Carrier 38APD025-100, 38APS025-050 User Manual

GEMINI™ SELECT

38APS025-050,38APD025-100

Commercial Air-Cooled Condensing Units

with COMFORTLINK™ Controls

Controls, Start-Up, Operation,

Service, and Troubleshooting

50/60 Hz

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . 1,2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Conventions Used in This Manual. . . . . . . . . . . . . . . . 2

Display Module Usage . . . . . . . . . . . . . . . . . . . . . . . . . . 17

• SCROLLING MARQUEE DISPLAY

• ACCESSORY NAVIGATOR™ DISPLAY MODULE

Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . . . . 18

Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . . . 18

Energy Management Module (EMM) . . . . . . . . . . . . . 18

Compressor Expansion Module (CXB) . . . . . . . . . . 19

AUX Board (AUX). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Enable/Off/Remote Contact Switch. . . . . . . . . . . . . . 19

Emergency On/Off Switch . . . . . . . . . . . . . . . . . . . . . . . 19

Board Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Control Module Communication. . . . . . . . . . . . . . . . . 19

Carrier Comfort Network

OPERATING DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-33

Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

• RETURN AIR TEMPERATURE (RAT) ACCESSORY

• SUPPLY AIR TEMPERATURE (SAT) ACCESSORY

• COMPRESSOR RETURN GAS TEMPERATURE SENSOR (RGT)

• OUTDOOR-AIR TEMPERATURE SENSOR (OAT)

• DISCHARGE TEMPERATURE THERMISTOR (DTT)

• SPACE TEMPERATURE SENSOR (SPT)

Fan Status Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Thermostat Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Pressure Transducer Inputs. . . . . . . . . . . . . . . . . . . . . 23

Energy Management Module . . . . . . . . . . . . . . . . . . . . 23

Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Service Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Operation of Machine Based on Control

Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Set Point Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

• DEMAND LIMIT (2-Stage Switch Controlled)

• EXTERNALLY POWERED DEMAND LIMIT (4 to 20 mA Controlled)

• DEMAND LIMIT (CCN Loadshed Controlled)

Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . . . 32

Digital Scroll Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

System Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-49

Preliminary Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Adjust Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . 34

Check Compressor Oil Level . . . . . . . . . . . . . . . . . . . . 47

Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

®

(CCN) Interface. . . . . . . 20

Page

Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Actual Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

• AMBIENT LIMITATIONS

• VOLTAGE (ALL UNITS)

Operation Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-59

Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . 49

• CONTROL COMPONENTS

Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Pressure Transducers. . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Condenser Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Motormaster

• GENERAL OPERATION

• CONFIGURATION

• DRIVE PROGRAMMING

•EPM CHIP

• LOSS OF CCN COMMUNICATIONS

• TROUBLESHOOTING

• REPLACING DEFECTIVE MODULES

Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59,60

Recommended Maintenance Schedule. . . . . . . . . . 59

Microchannel Heat Exchanger (MCHX) Condenser

Coil Maintenance and Cleaning

Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 60-66

Complete Unit Stoppage and Restart. . . . . . . . . . . . 60

• GENERAL POWER FAILURE

• UNIT ENABLE-OFF-REMOTE CONTACT SWITCH

IS OFF

• FAN STATUS INPUT OPEN

• OPEN 24-V CONTROL CIRCUIT BREAKER(S)

• COOLING LOAD SATISFIED

• THERMISTOR FAILURE

• COMPRESSOR SAFETIES

Alarms and Alerts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

APPENDIX A — DISPLAY TABLES . . . . . . . . . . . 67-78

APPENDIX B — CCN TABLES . . . . . . . . . . . . . . . . 79-84

START-UP CHECKLIST FOR 38AP SPLIT SYSTEM

CONDENSING UNIT . . . . . . . . . . . . . . . . . . . . CL-1-CL-5

®

V Controller . . . . . . . . . . . . . . . . . . . . . . 54

SAFETY CONSIDERATIONS

Installing, starting up, and servicing this equipment can be hazardous due to system pressures, electrical components, and equipment location (roof, elevated structures, mechanical rooms, etc.). Only trained, qualified installers and service mechanics should install, start up, and service this equipment.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53380003-01 Printed in U.S.A. Form 38AP-1T Pg 1 210 11-09 Replaces: New

When working on this equipment, observe precautions in

ENTER

ESCAPE

ENTER

the literature, and on tags, stickers, and labels attached to the equipment, and any other safety precautions that apply. Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting this equipment, and in handling all electrical components.

WARNING

Electrical shock can cause personal injury and death. Shut off all power to this equipment during installation and service. There may be more than one disconnect switch. Tag all disconnect locations to alert others not to restore power until work is completed.

WARNING

DO NOT VENT refrigerant relief valves within a building. Outlet from relief valves must be vented outdoors in accordance with the latest edition of ANSI/ASHRAE (American National Standards Institute/American Society of Heating, Refrigeration and Air Conditioning Engineers) 15 (Safety Code for Mechanical Refrigeration). The accumulation of refrigerant in an enclosed space can displace oxygen and cause asphyxiation. Provide adequate ventilation in enclosed or low overhead areas. Inhalation of high concentrations of vapor is harmful and may cause heart irregularities, unconsciousness or death. Misuse can be fatal. Vapor is heavier than air and reduces the amount of oxygen available for breathing. Product causes eye and skin irritation. Decomposition products are hazardous.

WARNING

DO NOT attempt to unbraze factory joints when servicing this equipment. Compressor oil is flammable and there is no way to detect how much oil may be in any of the refrigerant lines. Cut lines with a tubing cutter as required when performing service. Use a pan to catch any oil that may come out of the lines and as a gage for how much oil to add to system. DO NOT re-use compressor oil.

CAUTION

This unit uses a microprocessor-based electronic control system. Do not use jumpers or other tools to short out components, or to bypass or otherwise depart from recommended procedures. Any short-to-ground of the control board or accompanying wiring may destroy the electronic modules or electrical components.

CAUTION

Puron® refrigerant (R-410A) systems operate at higher pressures than standard R-22 systems. Do not use R-22 service equipment or components on Puron refrigerant equipment. If service equipment is not rated for Puron refrigerant, equipment damage or personal injury may result.

CAUTION

GENERAL

This publication contains Controls Start-Up, Service, Operation, and Troubleshooting information for the Gemini™ Select 38AP condensing units with ComfortLink controls. See Table 1 for unit size information.

Table 1 — Unit Sizes

38AP UNIT SIZE

025 25 027 27 030 30 040 40 050 50 060 60 070 70 080 80 090 90 100 100

NOMINAL CAPACITY,

TONS, 60 Hz

CONTROLS

General —

the ComfortLink™ electronic control system that controls and monitors all operations of the unit.

The control system is composed of several components as listed in the sections below. See Fig. 1-3 for typical control box drawing. See Fig. 4-17 for power and control wiring.

The 38AP air-cooled condensing unit contains

Conventions Used in This Manual — The follow-

ing conventions for discussing configuration points for the local display (scrolling marquee or Navigator™ accessory) will be used in this manual.

Point names will be written with the mode name first, then any sub-modes, then the point name, each separated by an arrow symbol (. Names will also be shown in bold and italics. As an example, the Lead/Lag Circuit Select Point, which is located in the Configuration mode, Option sub-mode, would be written as Configuration OPT2LLCS.

This path name will show the user how to navigate through the local display to reach the desired configuration. The user would scroll through the modes and sub-modes using the

and keys. The arrow symbol in the path name represents pressing to move into the next level of the menu structure.

When a value is included as part of the path name, it will be shown at the end of the path name after an equals sign. If the value represents a configuration setting, an explanation will be shown in parenthesis after the value. As an example, ConfigurationOPT2LLCS = 2 (Circuit A leads).

Pressing the and keys simultaneously will scroll an expanded text description of the point name or value across the display. The expanded description is shown in the local display tables but will not be shown with the path names in text.

The CCN (Carrier Comfort Network referenced in the local display tables for users configuring the unit with CCN software instead of the local display. The CCN tables are located in Appendix B of the manual.

®

) point names are also

Refrigerant charge must be removed slowly to prevent loss of compressor oil that could result in compressor failure.

2

Fig. 1 — Component Arrangement — Unit Sizes 025-030

LEGEND

AUX — Auxiliary C—Contactor CB — Circuit Breaker CCHR — Crankcase Heater Relay CSB — Current Sensor Board EMM — Energy Management Module EQUIP GND — Equipment Ground FB — Fuse Block FC — Fan Contactor LON — Local Operating Network MBB — Main Base Board SW — Switch TB — Terminal Block TRAN — Transformer UPC — Unitary Protocol Converter

3

Fig. 2 — Component Arrangement — Unit Sizes 040-060

LEGEND

AUX — Auxiliary C—Contactor CB — Circuit Breaker CCH — Crankcase Heater Relay CSB — Current Sensor Board EMM — Energy Management Module EQUIP GND — Equipment Ground FC — Fan Contactor FCB — Fan Circuit Breaker LON — Local Operating Network MBB — Main Base Board MM — Motormaster

®

SW — Switch TB — Terminal Block TRAN — Transformer UPC — Unitary Protocol Converter

4

Fig. 3 — Component Arrangement — Unit Sizes 070-100

LEGEND

AUX — Auxiliary C—Contactor CB — Circuit Breaker CCH — Crankcase Heater Relay CSB — Current Sensor Board CXB — Compressor Expansion Board EMM — Energy Management Module EQUIP GND — Equipment Ground FC — Fan Contactor FCB — Fan Circuit Breaker LON — Local Operating Network MBB — Main Base Board SW — Switch TB — Terminal Block TRAN — Transformer UPC — Unitary Protocol Converter

5

Fig. 4 — Power Wiring Schematic — 38APS,APD025-030

6

Fig. 5 — Power Wiring Schematic — 38APS040,050

7

8

Fig. 6 — Power Wiring Schematic — 38APD040-060

9

Fig. 7 — Power Wiring Schematic — 38APD070-100

10

Fig. 8 — Control Wiring Schematic — 38APS025-050

Fig. 9 — Control Wiring Schematic — 38APD025-060

11

12

Fig. 10 — Control Wiring Schematic — 38APD070-100

Legend and Notes for Fig. 4-10

LEGEND NOTES:

ACCSY — Accessory ALM — Alarm AMPS — Amperes AUX — Auxiliary C—Contactor CB — Circuit Breaker CCB — Compressor Circuit Breaker CCH — Crankcase Heater Relay CH — Crankcase Heater COMP — Compressor CSB — Current Sensor Board CXB — Compressor Expansion Module DGS — Digital Scroll DPT — Discharge Pressure Transducer DTT — Discharge Temperature Thermistor DUS — Digital Unloaded Solenoid EMM — Energy Management Module EQUIP GND — Equipment Ground FB — Fuse Block FC — Fan Contactor FCB — Fan Circuit Breaker FIOP — Factory-Installed Option FR — Fan Relay FS — Fan Status FU — Fuse GND — Ground HPS — High Pressure Switch LLSV — Liquid Line Solenoid Valve LV T — Low Voltage Terminal MBB — Main Base Board MLV — Minimum Load Valve MM — Motormaster MP — Modular Motor Protector NEC — National Electrical Code OAT — Outdoor Air Thermistor OFM — Outdoor Fan Motor OPT — Option PL — Plug RAT — Return Air Temperature RGT — Return Gas Temperature RLY — SAT — Supply Air Temperature SEN — Sensor Terminal Block SET — Set Point Terminal Block SPT — Suction Pressure Transducer SW — Switch TB — Terminal Block TEMP — Temperature TRAN — Transformer UPC — Unitary Protocol Converter Y—Cool Stage

Relay

1. Factory wiring is in accordance with UL (Underwriters Laboratories) 1995 standards. Any field modifications or additions must be in compliance with all applicable codes.

2. Use 75 C minimum wire for field power supply.

3. All field interlock contacts must have a minimum rating of 2 amps at 24-vac sealed. See field interlock wiring.

4. Compressor and fan motors are thermally protected. Threephase motors protected against single-phase conditions.

5. Terminals 13 and 14 of LVT are for field connection of remote on-off. The contact must be rated for dry circuit application capable of handling a 5-vdc, 1 mA to 20 mA load.

6. For 500 series unit operation at 208-3-60 line voltage, TRAN1 primary connections must be moved to terminals H3 and H4.

7. For 575-3-60 units, fan circuit breakers FCB1 and FCB2 are replaced with fuse blocks FB1 and FB2.

8. For units with low ambient Motormaster option or field-installed acessory, fan contactors FC1 and FC2 are replaced with fan relays FR1 and FR2.

9. MP-A1 not used in the following units: 070-100: 400-v, 460-v units without digital scroll

10. MP-A2 not used in the following units: 070-100: 400-v, 460-v

11. MP-B1 not used in the following units: 070: all units 080-100: 400-v, 460-v

12. MP-B2 not used in the following units: 070: all units 080-100: 400-v, 460-v

13. MP-A3 not used in the following units: 090,100: 400-v, 460-v

14. MP-B3 not used in the following units: 070: all units 080-100: 400-v, 460-v

15. Jumper plug required when modular motor protector is not used.

®

V factory-installed

13

OUTSIDE AIR

DUCT SUPPLY

RETURN AIR

MAT/RAT SATFS1*

FAN

EVAPORATOR COIL

Fig. 11 — Field Power Wiring

LEGEND

NOTES:

1. Factory wiring is in accordance with UL 1995 standards. Field modifications or additions must be in compliance with all applicable codes.

2. All units or modules have single point primary power connection. Main power must be supplied from a field or factory-supplied disconnect.

3. Wiring for main field supply must be rated 75 C. Use copper conductors only.

a. Incoming wire size range for terminal block with MCA (minimum circuit

amps) up to 175 amps is 14 AWG (American Wire Gage) to 2/0.

b. Incoming wire size range for terminal block with MCA from 175.1 amps to

420 amps is 2 AWG to 600 kcmil.

c. Incoming wire size range for non-fused disconnect with MCA up to

100 amps is 14 AWG to 1/0.

d. Incoming wire size range for non-fused disconnect with MCA from

100.1 amp to 200 amps is 6 AWG to 350 kcmil.

e. Incoming wire size range for non-fused disconnect with MCA from

200.1 amp to 450 amps is 3/0 to 500 kcmil.

4. Refer to certified dimensional drawings for exact locations of the main power and control power entrance locations.

EQUIP GND — Equipment Ground NEC — National Electrical Code

a38-7122

LEGEND

*FS1 can be pressure differential switch (shown), motor current detection, or sail switch.

FS1 — Fan Status Switch (24-v) MAT — Mixed Air Temperature Sensor RAT — Return Air Temperature Sensor SAT — Supply Air Temperature Sensor

a38-7133

Fig. 12 — MAT/RAT and SAT Sensor Layout

14

a38-7125

a38-7127

*See Fig. 12 for MAT/RAT and SAT location. †Not required for single circuit units.

Fig. 15 — Constant Volume Application Wiring Diagram Space Temperature Sensor Control, Sizes 025-100

Fig. 14 — Constant Volume Application Wiring Diagram 2-Stage Thermostat Control —

with Digital Scroll Option, Sizes 025-030 or All Sizes 040-100

Fig. 13 — Constant Volume Application Wiring Diagram 2-Stage Thermostat Control, Sizes 025-030 —

without Digital Scroll Option

*Not required for single circuit units.

25242322212019181716151413

REMOTE

ON/OFF

LV T TERMINAL STRIP

121110987654321

ALM

R

COOL 1

COOL 2

FS 1

LLSV-A

LLSV-B

*

SEE NOTE 6

a38-7126

*See Fig. 12 for MAT/RAT and SAT location. †Not required for single circuit units.

25242322212019181716151413

REMOTE

ON/OFF

LV T TERMINAL STRIP

121110987654321

ALM

R

COOL 1

FS 1

LLSV-A

LLSV-B

*

SEE NOTE 6

COOL2

121110987654321

25242322212019181716151413

LV T TERMINAL

STRIP

SAT

FS 1

SPT

*

MAT/RAT

*

SA

†

LLSV-B

REMOTE

ON/OFF

ALM

R

15

LLSV-A

SEE NOTE 6

25242322212019181716151413

REMOTE

ON/OFF

LV T TERMINAL STRIP

121110987654321

ALM

R

FS 1

LLSV-A

SEE NOTE 6

SAT

*

MAT/RAT

*

LLSV-B

†

a38-7128

Fig. 16 — Variable Air Volume Application Wiring Diagram, Sizes 025-100

*See Fig. 12 for MAT/RAT and SAT location. †Not required for single circuit units.

Fig. 17 — Optional Energy Management Module Wiring

a38-7129

Legend and Notes for Fig. 13-17

LEGEND

NOTES:

1. Factory wiring is in accordance with UL 1995 standards. Field modifications or additions must be in compliance with all applicable codes.

2. All units or modules have single point primary power connection. Main power must be supplied from a field or factorysupplied disconnect.

3. Wiring for main field supply must be rated 75 C. Use copper conductors only.

a. Incoming wire size range for terminal block with MCA (mini-

mum circuit amps) up to 175 amps is 14 AWG (American Wire Gage) to 2/0.

b. Incoming wire size range for terminal block with MCA from

175.1 amps to 420 amps is 2 AWG to 600 kcmil.

c. Incoming wire size range for non-fused disconnect with MCA

up to 100 amps is 14 AWG to 1/0.

d. Incoming wire size range for non-fused disconnect with MCA

from 100.1 amp to 200 amps is 6 AWG to 350 kcmil.

e. Incoming wire size range for non-fused disconnect with MCA

from 200.1 amp to 450 amps is 3/0 to 500 kcmil.

4. Terminals 1 and 2 of the LVT are for the alarm relay. The maximum load allowed for the alarm relay is 5-va sealed and 10-va inrush at 24-v. Field power supply is not required.

5. Refer to certified dimensional drawings for exact locations of the main power and control power entrance locations.

6. Terminals 24, 25, and 2 of the LVT are for the control of the field-supplied LLSV. The maximum load allowed for the LLSV is 15-va sealed and 30-va inrush at 24-v. Field power supply is not required.

7. LLSV (24-v) should be 15-va maximum per valve as required.

8. Installation of fan status switch (FS1) is recommended.

9. The contacts for remote ON/OFF, fan status, and demand limit options must be rated for dry circuit application capable of handling a 24-vac load up to 50 mA.

ALM R — Alarm Relay (24-v), 5-va Maximum COOL1 — Thermostat Stage 1 (24-v) COOL2 — Thermostat Stage 2 (24-v) FS1 — Fan Status Switch (24-v) LLSV — Liquid Line Solenoid Valve LV T — Low Voltage Terminal MAT — Mixed Air Temperature Sensor RAT — Return Air Temperature Sensor SA — Set Point Adjustment (T-56, T-59) SAT — Supply Air Temperature Sensor SPT — Space Temperature Sensor (T-55, T-56, T-59)

Field Control Wiring

LV T TERMINAL

121110987654321

25242322212019181716151413

STRIP

–

+

TEMP

RESET

4-20 mA

–

+

–

+

DEMAND LIMIT STEP 1

DEMAND LIMIT STEP 2

DEMAND

LIMIT

4-20 mA

COOLING

SETPOINT/

CAPACITY

REQUESTED

4-20 mA

16

Display Module Usage

Run Status

Service Test

Temperature

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

Alarm Status

ENTER

MODE

ESCAPE

Fig. 18 — Scrolling Marquee Display

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

R

un

S

ta

tu

s

S

er

vic

e

T

e

s

t

T

e

m

pe

ra

tu

r

e

s

P

res

s

u

res

S

e

tpo

ints

Inp

u

ts

O

u

tpu

ts

C

o

nfig

u

ratio

n

T

im

e

C

lo

ck

O

p

e

ra

tin

g

M

o

d

e

s

A

la

rm

s

EN

TER

ES

C

M

O

D

E

Alarm Status

Comfort

Link

Fig. 19 — Accessory Navigator Display Module

SCROLLING MARQUEE DISPLAY — This device is the keypad interface used for accessing unit information, reading sensor values, and testing the unit. See Fig. 18. The scrolling marquee display is a 4-key, 4-character, 16-segment LED (light-emitting diode) display. Eleven mode LEDs are located on the display as well as an Alarm Status LED. See Appendix A — Display Tables for further details.

The scrolling marquee display module provides the user interface to the ComfortLink™ control system. The display has up and down arrow keys, an key, and an key. These keys are used to navigate through the different levels of the display structure. See Table 2. Press the key until the display is blank to move through the top 11 mode levels indicated by LEDs on the left side of the display.

Pressing the and keys simultaneously will scroll a clear language text description across the display indicating the full meaning of each display acronym. Pressing the and keys when the display is blank (Mode LED level) will return the scrolling marquee display to its default menu of rotating display items. In addition, the password will be disabled requiring that it be entered again before changes can be made to password protected items. Clear language descriptions will be displayed in English.

When a specific item is located, the display will flash showing the operator, the item, followed by the item value and then followed by the item units (if any). Press the key to stop the display at the item value. Items in the Configuration and Service Test modes are password protected. The display will flash PASS and WORD when required. Use the and arrow keys to enter the 4 digits of the password. The default password is 1111.

Changing item values or testing outputs is accomplished in the same manner. Locate and display the desired item. Press

to stop the display at the item value. Press the key again so that the item value flashes. Use the

arrow keys to change the value or state of an item and press the

key to accept it. Press the key and the item, value, or units display will resume. Repeat the process as required for other items.

ACCESSORY NAVIGATOR™ DISPLAY MODULE — The Navigator module provides a mobile user interface to the

ComfortLink™ control system, which is only available as a field-installed accessory. The display has up and down arrow keys, an key, and an key. These keys are used to navigate through the different levels of the display structure. Press the key until ‘Select a Menu Item’ is displayed to move through the top 11 mode levels indicated by LEDs on the left side of the display. See Fig. 19.

Once within a Mode or sub-mode, a “>” indicates the cur-

rently selected item on the display screen. Pressing the

and keys simultaneously will put the Navigator module into expanded text mode where the full meaning of all sub-modes, items and their values can be displayed. Pressing the and keys when the display says ‘Select Menu Item’ (Mode LED level) will return the Navigator module to its default menu of rotating display items (those items in Run Status



VIEW). In addition, the password will be disabled, requiring that it be entered again before changes can be made to password protected items. Press the key to exit out of the expanded text mode.

NOTE: When the Language Selection (Configuration DISPLANG), variable is changed, all appropriate display expansions will immediately change to the new language. No power-off or control reset is required when reconfiguring languages.

When a specific item is located, the item name appears on the left of the display, the value will appear near the middle of the display and the units (if any) will appear on the far right of the display. Press the key at a changeable item and the value will begin to flash. Use the up and down arrow keys to change the value, and confirm the value by pressing the key.

Changing item values or testing outputs is accomplished in the same manner. Locate and display the desired item. Press

so that the item value flashes. Use the arrow keys to change the value or state and press the key to accept it. Press the key to return to the next higher level of structure. Repeat the process as required for other items.

Items in the Configuration and Service Test modes are password protected. The words Enter Password will be displayed when required, with 1111 also being displayed. The default password is 0111. Use the arrow keys to change the number and press to enter the digit. Continue with the remaining digits of the password. The password can only be changed through CCN operator interface software such as ComfortWORKS

®

, ComfortVIEW™ and Service Tool.

17



Adjusting the Contrast

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER



— The contrast of the display can be adjusted to suit ambient conditions. To adjust the contrast of the Navigator module, press the key until the display reads, “Select a menu item.” Using the arrow keys move to the Configuration mode. Press to obtain access to this mode. The display will read:

> TEST OFF METR OFF LANG ENGLISH

Pressing will cause the “OFF” to flash. Use the up or down arrow to change “OFF” to “ON”. Pressing will illuminate all LEDs and display all pixels in the view screen. Pressing and simultaneously allows the user to adjust the display contrast. Use the up or down arrows to adjust the contrast. The screen’s contrast will change with the adjustment. Press to accept the change. The Navigator module will keep this setting as long as it is plugged in to the LEN bus.

Adjusting the Backlight Brightness

— The backlight of the display can be adjusted to suit ambient conditions. The factory default is set to the highest level. To adjust the backlight of the Navigator module, press the key until the display reads, “Select a menu item.” Using the arrow keys move to the Configuration mode. Press to obtain access to this mode. The display will read:

> TEST OFF METR OFF LANG ENGLISH

Pressing will cause the “OFF” to flash. Use the up

or down arrow keys to change “OFF” to “ON”. Pressing

will illuminate all LEDs and display all pixels in the

view screen. Pressing the up and down arrow keys simultaneously allows the user to adjust the display brightness. Use the up or down arrow keys to adjust screen brightness. Press

to accept the change. The Navigator module will

keep this setting as long as it is plugged in to the LEN bus.

Main Base Board (MBB) — See Fig. 20. The MBB is

the heart of the ComfortLink control system. It contains the major portion of operating software and controls the operation of the machine. The MBB continuously monitors input/output channel information received from its inputs and from all other modules. The MBB receives inputs from the discharge and suction pressure transducers, current sensor boards (CSB) and thermistors. See Table 3. The MBB also receives the discrete inputs from the thermostat contacts and other status switches. See Table 4. The MBB also controls several outputs. Information is transmitted between modules via a 3-wire communication bus or LEN (Local Equipment Network). The CCN (Carrier Comfort Network

®

) bus is also supported. Connections to both LEN and CCN buses are made at the LVT (low voltage terminal) terminal strip.

Current Sensor Board (CSB) — The CSB is used to

monitor the status of the compressors by measuring current and providing an analog input to the main base board (MBB) or compressor expansion module (CXB).

Energy Management Module (EMM) — The EMM

module is available as a factory-installed option or as a fieldinstalled accessory. The EMM module receives 4 to 20 mA inputs for the percent capacity, temperature reset, cooling set point, and demand limit functions. The EMM module also receives the switch inputs for the field-installed 2-stage demand limit and when two thermostats are used for one unit. The EMM module communicates the status of all inputs with the MBB, and the MBB adjusts the control point, capacity limit, and other functions according to the inputs received.

Table 2 — Scrolling Marquee Display Menu Structure*

MODE

SUB-MODE

LEGEND

Ckt — Circuit

*Throughout this text, the location of items in the menu structure will be described in

the following format: Item Expansion (Mode Name Sub-mode N ame ITEM)

RUN

STATUS

Auto Display (VIEW)

Machine

Hours/Starts

(RUN)

Compressor

Run Hours

(HOUR)

Compressor

Starts

(STRT)

Preventive

Maintenance

(PM)

Software

Ver si on (VERS)

SERVICE

TEST

Manual

Mode

On/Off

(TEST)

Unit Outputs (OUTS)

Ckt A Comp

Tests

(CMPA)

Ckt B Comp

Tests

(CMPB)

TEMPERATURES PRESSURES

Unit

Temperatures

(UNIT)

Ckt A

Temperatures

(CIR.A)

Ckt B

Temperatures

(CIR.B)

Ckt A

Pressures

(PRC.A)

Ckt B

Pressures

(PRC.B)

SET

POINTS

Cooling (COOL)

Head

Pressure

(HEAD)

INPUTS OUTPUTS CONFIGURATION

Unit

Discrete

(GEN.I)

Ckt A/B (CRCT)

Unit

Analog

(4-20)

Unit

Discrete

(GEN.O)

Ckt A

(CIR.A)

Ckt B

(CIR.B)

Display

(DISP)

Unit Configuration

(UNIT)

CCN Network

(CCN)

Options 1

(OPT1)

Options 2

(OPT2)

Motormaster

(M.MST)

Reset Cool

Temperature

(RSET)

Set Point Select

(SLCT) Service

Configuration

(SERV)

Broadcast

Configuration

(BCST)

TIME

CLOCK

Unit Time

(TIME)

Unit Date

(DATE)

Daylight

Saving

Time

(DST)

Local

Holiday

Schedules

(HOL.L)

Schedule

Number

(SCH.N)

Local

Schedule

Number

(SCH.L)

Schedule

Overide

(OVR)

OPERATING

MODES

Modes

(MODE)

Task State

(TSKS)

ALARMS

Current (CRNT)

Reset

Alarms

(RCRN)

Alarm

History

(HIST)

18

Table 3 — Thermistor Designations

CEPL130346-01

STATUS

LEN

J1

J2

J4

J3

J5

J6

J7

J8

J9

J10

CCN

RED LED - STATUS GREEN LED -

LEN (LOCAL EQUIPMENT NETWORK)

YELLOW LED CCN (CARRIER COMFORT NETWORK)

INSTANCE JUMPER

K11

K10 K9

K8

K7

K6

K5

K4

K3 K2

K1

Fig. 20 — Main Base Board

THERMISTOR INPUT PIN CONNECTION POINT

Return Air (Accessory) MBB J8-11,12; LVT 19,20 Supply Air (Accessory) MBB J8-12,13; LVT 11,19 Compressor Return Gas

Temperature A Compressor Return Gas

Temperature B Outdoor Air Temperature MBB J8-7,8 Discharge Temperature

(Digital Option Only) Space Temperature (Accessory) MBB J8-5,6; LVT 21,22

Table 4 — Switch Inputs

Thermostat Y1 (Accessory) LVT 12,18 Thermostat Y2 (Accessory) LVT 15,18 Fan Status 1 (Accessory) LVT 16,18 Fan Status 2 (Accessory) LVT 17,18 Remote On/Off LVT 13,14 High Pressure Switch A MBB J6-4 High Pressure Switch B MBB J6-6

SWITCH INPUT PIN CONNECTION POINT

Compressor Expansion Module (CXB) — The

CXB is only used on unit sizes 070-100 to provide additional inputs and outputs for fans and compressors when the unit has more than 4 compressors.

AUX Board (AUX) — The AUX is used with the digital

scroll option and the low ambient head pressure option. It provides additional inputs and outputs for digital scroll control along with analog outputs to control head pressure control fan speeds.

Enable/Off/Remote Contact Switch — The Enable/

Off/Remote Contact switch is a 3-position switch used to control the unit. When switched to the Enable position, the unit is under its own control. Move the switch to the Off position to shut the unit down. Move the switch to the Remote Contact position and a field-installed dry contact can be used to start the unit. The contacts must be capable of handling a 24 vac, 50 mA load. In the Enable and Remote Contact (dry contacts closed)

MBB J8-1,2

MBB J8-3,4

AUX J6- 1, 2

positions, the unit is allowed to operate and respond to the scheduling configuration, CCN configuration and set point data. See Fig. 21.

Emergency On/Off Switch — The Emergency On/Off

switch should only be used when it is required to shut the unit off immediately. Power to the MBB, CXB, AUX, EMM, and scrolling marquee display is interrupted when this switch is off and all outputs from these modules will be turned off.

Board Addresses — The main base board (MBB) has a

3-position Instance jumper that must be set to ‘1.’ All other boards have 4-position DIP switches. All switches are set to ‘On’ for all boards.

Control Module Communication

RED LED — Proper operation of the control boards can be visually checked by looking at the red status LEDs (light-emitting diodes). When operating correctly, the red status LEDs should be blinking in unison at a rate of once every 2 seconds. If the red LEDs are not blinking in unison, verify that correct power is being supplied to all modules. Be sure that the main base board (MBB) is supplied with the current software. If necessary, reload current software. If the problem still persists, replace the MBB. A red LED that is lit continuously or blinking at a rate of once per second or faster indicates that the board should be replaced.

GREEN LED — The MBB has one green LED. The Local Equipment Network (LEN) LED should always be blinking whenever power is on. All other boards have a LEN LED which should be blinking whenever power is on. Check LEN connections for potential communication errors at the board J3 and/or J4 connectors. Communication between modules is accomplished by a 3-wire sensor bus. These 3 wires run in parallel from module to module. The J4 connector on the MBB provides both power and communication directly to the marquee display only.

YELLOW LED — The MBB has one yellow LED. The Carrier Comfort Network (CCN) LED will blink during times of network communication.

19

Carrier Comfort Network® (CCN) Interface —

CB1

REMOTE

CONTROL

ENABLE

SCROLLING MARQUEE

DISPLAY

ENABLE/OFF/REMOTE CONTACT SWITCH

EMERGENCY ON-OFF SWITCH

SW1 OFF

OFF

ON

SW2

CB2 CB3

Fig. 21 — Scrolling Marquee, Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations

LEGEND

CB — Circuit Breaker SW — Switch

The 38AP units can be connected to the CCN if desired. The communication bus wiring is a shielded, 3-conductor cable with drain wire and is supplied and installed in the field. See Table 5. The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system elements on either side of it. This is also required for the negative and signal ground pins of each system element. Wiring connections for CCN should be made at LVT. Consult the CCN Contractor’s Manual for further information.

NOTE: Conductors and drain wire must be 20 AWG (American Wire Gage) minimum stranded, tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –20 C to 60 C is required. Wire manufactured by Alpha (2413 or 5463), American (A22503), Belden (8772), or Columbia (02525) meets the above mentioned requirements.

It is important when connecting to a CCN communication bus that a color coding scheme be used for the entire network to simplify the installation. It is recommended that red be used for the signal positive, black for the signal negative, and white for the signal ground. Use a similar scheme for cables containing different colored wires.

At each system element, the shields of its communication bus cables must be tied together. If the communication bus is entirely within one building, the resulting continuous shield must be connected to a ground at one point only. If the communication bus cable exits from one building and enters another, the shields must be connected to grounds at the lightning suppressor in each building where the cable enters or exits the building (one point per building only). To connect the unit to the network:

1. Turn off power to the control box.

2. Cut the CCN wire and strip the ends of the red (+), white

3. Connect the red wire to (+) terminal on LVT of the plug,

(ground), and black (–) conductors. (Substitute appropriate colors for different colored cables.)

the white wire to COM terminal, and the black wire to the (–) terminal.

20

4. The RJ14 CCN connector on LVT can also be used, but is only intended for temporary connection (for example, a laptop computer running Service Tool).

IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent the unit from starting. If abnormal conditions occur, unplug the connector. If conditions return to normal, check the CCN connector and cable. Run new cable if necessary. A short in one section of the bus can cause problems with all system elements on the bus.

Table 5 — CCN Communication Bus Wiring

MANUFACTURER

Alpha 1895 — American A21451 A48301 Belden 8205 884421 Columbia D6451 — Manhattan M13402 M64430 Quabik 6130 —

Regular Wiring Plenum Wiring

PART N O.

OPERATING DATA

Sensors — The electronic control uses 3 to 7 thermistors to

sense temperatures for controlling unit operation. See Table 3. These sensors are outlined below. Three different thermistor curves are utilized depending on the thermistor and the configuration of the input. The three different types are 5 kat 77 F (25 C), 10 kat 77 F (25 C), and 86 k at 77 F (25 C). See Thermistors section on page 49 for additional information.

RETURN AIR TEMPERATURE (RAT) ACCESSORY (Part No. 33ZCSENSAT) — A return air temperature sensor is required for unit sizes 040-100 and all units equipped with the digital scroll option. The sensor is field installed in the indoor unit and wired to the LVT of the unit to measure the air temperature entering the evaporator coil. The sensor should be located directly in front of the evaporator coil after an outside air intake.

The RAT sensor consists of a thermistor encased within a stainless steel probe. See Fig. 22. The sensor probe is 6 in. nominal length with 114 in. of unshielded, 2-conductor 18 AWG twisted-pair cables. The sensor temperature range is –40 to 245 F with a nominal resistance of 10,000 ohms at 77 F. The sensor has with an accuracy of ±0.36 F.

Fig. 22 — 33ZCSENSAT Sensor

.39

.08

FOAM GASKET

.40'' O.D.

.250 ±.01 Dia

5.5 ±.5

PLENUM RATED CABLE 114'' ±6

3.00

3.90

.175 DIA x .600

NOTE: All dimensions shown in inches.

2

3

45

61

SW1

SEN

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-)

CCN COM

SENSOR WIRING

Fig. 23 — Space Temperature Sensor

Typical Wiring (33ZCT55SPT)

2

3

45

61

SW1

SEN

SET

Cool Warm

BRN (GND) BLU (SPT)

RED(+)

WHT(GND)

BLK(-)

CCN COM

SENSOR WIRING

JUMPER TERMINALS AS SHOWN

BLK (T56)

Fig. 24 — Space Temperature Sensor

Typical Wiring (33ZCT56SPT)

SUPPLY AIR TEMPERATURE (SAT) ACCESSORY (33ZCSENSAT) — A supply air temperature sensor is required for unit sizes 040-100 and all units equipped with the digital scroll option. The SAT sensor consists of a thermistor encased within a stainless steel probe. See Fig. 22. The SAT sensor probe is 6 in. nominal length with 114 in. of unshielded, 2-conductor 18 AWG twisted-pair cables. The sensor temperature range is –40 to 245 F with a nominal resistance of 10,000 ohms at 77 F. The sensor has an accuracy of ±0.36 F.

NOTE: The sensor must be mounted in the discharge of the unit, downstream of the cooling coil and before any heating coil or heat exchanger if reheat is utilized. Be sure the probe tip does not come in contact with any of the unit surfaces.

COMPRESSOR RETURN GAS TEMPERATURE SENSOR (RGT) — These sensors are factory installed in a friction fit well located in the suction line of each circuit. They are a 5 k thermistor connected to the main base board.

OUTDOOR-AIR TEMPERATURE SENSOR (OAT) — This sensor is factory installed on a bracket which is inserted through the base pan of the unit on the unit sizes 025-060 and mounted to the back of the control box on the unit sizes 070-

100. This sensor is a 5 k thermistor connected to the main base board.

DISCHARGE TEMPERATURE THERMISTOR (DTT) — This sensor is only used on units with a digital compressor. The sensor is mounted on the discharge line close to the discharge of the digital compressor. It attaches to the discharge line using a spring clip and protects the system from high discharge gas temperature when the digital compressor is used. This sensor is a 86 k thermistor connected to the AUX board.

SPACE TEMPERATURE SENSOR (SPT) — The space temperature sensors are used to measure the interior temperature of a building. The following three types of SPT sensors are available:

• Space temperature sensor (33ZCT55SPT) with timed override button (see Fig. 23)

• Space temperature sensor (33ZCT56SPT) with timed override button and set point adjustment (see Fig. 24)

• Space temperature sensor (33ZCT59SPT) with occupancy override button, set point adjustment slidebar, and LCD (liquid crystal display) display

The sensor should be mounted approximately 5 ft from the floor in an area representing the average temperature in the space. Allow at least 4 ft between the sensor and any corner. Mount the sensor at least 2 ft from an open doorway.

To connect the space temperature sensor (Fig. 25):

1. Use a 20 gage wire to connect the sensor to the controller. The wire is suitable for distances of up to 500 ft. Use a three-conductor shielded cable for the sensor and set point adjustment connections. The standard CCN communication cable may be used. If the set point adjustment (slidebar) is not required, then an unshielded, 18 or 20 gage, two-conductor, twisted pair cable may be used. Connect one wire of the twisted pair to one SEN terminal and connect the other wire to the other SEN terminal located under the cover of the space temperature sensor.

2. Connect the other ends of the wires to terminals 21 and 22 on LVT located in the unit control box.

3. Connect the T56 set point adjustment between the SET terminal and LVT terminal 23.

21

Units on the CCN can be monitored from the space using

Fig. 25 — Typical SPT Wiring

T-55 SPACE SENSOR

CCN+

CCN GND

CCN-

TO CCN COMM 1 BUS (PLUG) AT UNIT

1

2

3

4

5

6

Fig. 26 — CCN Communications Bus Wiring to

Optimal Space Sensor RJ11 Connector

J6

6

7

RED

BLK

RED

BLK

RED

BLK

RED

SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4

J6

6

7

RED

BLK

RED

BLK

SENSOR 2

SENSOR 1

RED

BLK

SENSOR 3

SENSOR 4

BLK

RED

BLK

SENSOR 8

SENSOR 9

SENSOR 5

RED

BLK

SENSOR 6

SENSOR 7

BLK

RED

SPACE TEMPERATURE AVERAGING — 4 SENSOR APPLICATION

Fig. 27 — Space Temperature Averaging

LEGEND

Factory Wiring

Field Wiring

SPACE TEMPERATURE AVERAGING — 9 SENSOR APPLICATION

the RJ11 connector provided with the space sensor, if desired. To wire the RJ11 connector into the CCN (Fig. 26):

IMPORTANT: The cable selected for the RJ11 connector wiring MUST be identical to the CCN communication bus wire used for the entire network. Refer to Table 5 for acceptable wiring.

1. Cut the CCN wire and strip ends of the red (+), white (ground), and black (–) conductors. (If another wire color scheme is used, strip ends of appropriate wires.)

2. Insert and secure the red (+) wire to terminal 5 of the space temperature sensor terminal block.

3. Insert and secure the white (ground) wire to terminal 4 of the space temperature sensor.

4. Insert and secure the black (–) wire to terminal 2 of the space temperature sensor.

5. Connect the other end of the communication bus cable to the remainder of the CCN communication bus.

NOTE: See Fig. 27 for space temperature averaging.

SEN

SPT

SENSOR

SEN

SET

LVT

21

22

23

22

Fan Status Input — A proof-of-fan operation is recom-



CEBD430351-0396-01C

TEST 1

CEPL130351-01

PWR

TEST 2

J1

J2

J4 J3

J5

J6

J7

LEN

STATUS

RED LED - STATUS

GREEN LED LEN (LOCAL EQUIPMENT NETWORK)

ADDRESS DIP SWITCH

Fig. 28 — Energy Management Module

mended and needs to be field installed in the indoor unit. Several different types of switches can be utilized, such as a differential pressure switch located across the indoor fan or auxiliary contacts on an indoor fan contactor.

Thermostat Input — A two-stage thermostat can be

used for constant volume applications to provide Y1 and Y2 cooling inputs.

Pressure Transducer Inputs — Each refrigerant cir-

cuit is equipped with a suction and discharge pressure transducer. The suction pressure transducers have a yellow body with a pressure range of -6.7 to 420 psig while the discharge transducers have a red body with a pressure range of 14.5 to 667 psig. These inputs connect to the MBB (main base board) and are used to monitor the status of the unit and to ensure the unit operates within the compressor envelope. The transducers are used to protect the compressor from operating at too low or too high of a pressure condition. In some cases, the unit may not be able to run at full capacity. The MBB will automatically reduce the capacity of a circuit as needed to maintain specified maximum/minimum operating pressures.

Energy Management Module (Fig. 28) — The

energy management module (EMM) is a factory-installed option (FIOP) or field-installed accessory used for the following types of temperature reset, demand limit, and capacity control features:

• 4 to 20 mA temperature reset

• 4 to 20 mA cooling set point

• 4 to 20 mA desired capacity set point

• 4 to 20 mA demand limit

• Discrete inputs for 2-step demand limit (requires fieldsupplied dry contacts capable of handling a 24 vac, 50 mA load)

• Discrete inputs for units with dual thermostats

NOTE: A field-supplied 4 to 20 mA signal generator is required for use with the EMM.

See VAV Supply Air Temperature Reset and Demand Limit

sections on pages 29 and 31 for further details.

CAUTION

Care should be taken when interfacing with other manufacturer’s control systems due to possible power supply differences, full wave bridge versus half wave rectification. The two different power supplies cannot be mixed. ComfortLink™ controls use half wave rectification. A signal isolation device should be utilized if a full wave bridge signal generating device is used.

Control — When mechanical cooling is required, the MBB

has the capability to control the unit capacity by staging multiple scroll compressors and controlling the digital scroll compressor operation. The control also checks on various other operation parameters in the unit to make sure that safeties are not exceeded and the compressors are reliably operated.

The ComfortLink™ control system offers two basic control approaches to mechanical cooling; constant volume operation for 2 stages of cooling or VAV operation for multiple stages of cooling. In addition to these methods of control, the ComfortLink control offers the ability to run multiple stages of cooling for either a space temperature sensor or thermostat control by controlling the unit to either a low or high cool set point. The control type Configuration OPT2 C.TYP determines the selection of the type of cooling control as well as the method for selecting a cooling mode.

SETTING UP THE SYSTEM Machine Control Type (

— The most important cooling control configuration is located under Configuration OPT2. This configuration defines the method and control source responsible for selecting a cooling mode. The configuration also determines the method by which compressors are staged. Control types are:

• C.TYP = 1 (VAV-RAT) configuration refers to standard

VAV operation.

Configuration OPT2 C.TYP)

23



Fig. 29 — Space Temperature vs.

Space Temperature Set Point

A48-7701

• C.TYP = 3 (TSTAT-MULTI) configuration will force the MBB to monitor the thermostat inputs to make a determination of mode. Unlike traditional 2-stage thermostat control, the unit is allowed to use multiple stages of cooling control and perform VAV style operation. The control will be able to call out a low set point or a high set point to maintain supply air temperature. (Required for 025-030 units with digital scroll option and 040-100 units with two-stage thermostat control.)

• C.TYP = 4 (TSTAT-2STG) configuration will force the MBB to monitor the thermostat inputs to make a determination of mode.

• C.TYP = 5 (SPT-MULTI) configuration will force the MBB to monitor a space temperature sensor to make a determination of mode. Unlike traditional 2-stage space temperature control, the unit is allowed to use multiple stages of cooling control and perform VAV style operation. The control will be able to call out a low set point or a high set point to maintain supply air temperature.

• C.TYP = 7 (% CAPACITY) configuration will force the MBB to monitor the 4-20 cooling demand CL.MA input and translate this into desired % capacity for the unit.

• C.TYP = 9 (VAV-SETPOINT) configuration will force the MBB to monitor the 4-20 cooling demand CL.MA input. This value will be translated into a desired leaving-air set point ranging from 40 to 80 F. The control will translate the input linearly with 4 ma equal to 40 F set point and 20 mA equal to 80 F set point.

Unit Capacity Control Based on Unit Type

— The MBB uses several set points to control capacity depending on unit type. The set points are located in the set point area of the display SetPoints COOL. Refer to Table 6 and the following descriptions.

Table 6 — Unit Capacity Control

ITEM DESCRIPTION RANGE UNITS DEFAULT CSP1 Cooling Set Point 1 40-80 F 65 CSP2 Cooling Set Point 2 40-80 F 55

SPS.P Space Temperature Cooling Set

Poin t

L.C.ON Demand Level Low Cool On –1-2 ^F 1.5

H.C.ON Demand Level (+) High Cool On 0.5-20.0 ^F 0.5

L.C.OF Demand Level (–) Low Cool Off 0.5-2 ^F 1

65-80 F 74

• C.TYP = 1 (VAV-RAT) is a capacity control routine that controls compressor capacity to supply air temperature. The MBB will attempt to control leaving temperature to the control point (CTPT) which equals CSP1 plus any reset which is being applied.

• C.TYP = 3 (TSTAT-MULTI) configuration will force the MBB to monitor the thermostat inputs to make a determination of control point (CTPT). The control will vary the control point based on Y1 and Y2 inputs. When Y1 is closed CSP1 will be used and when Y2 is closed CSP2 will be used as the supply air temperature set point. CSP1 should be greater than CSP2.

• C.TYP = 4 (TSTAT-2STG) configuration will force the MBB to monitor the thermostat inputs to make a determination of mode and capacity. If Y1 input is closed, 50% of the unit capacity will be energized and if Y2 is closed, 100% of the unit capacity will be energized.

NOTE: This is not a preferred method of control for units with greater than 2 stages of capacity

• C.TYP = 5 (SPT-MULTI) configuration will force the MBB to monitor the thermostat inputs to determine mode and cooling set point as the unit is controlled by space temperature vs space temperature set point SPS.P. Unlike traditional 2-stage thermostat control, the unit is allowed to use multiple stages of cooling control and perform VAV style operation. The control will be able to call out a low set point (CSP1) or high set point (CSP2) for

supply air depending on space temperature vs space temperature set point. The control uses SPS.P, LC.ON,

HC.ON, and LC.OF to determine the leaving set point. LC.ON and HC.ON are added to the space temperature

set point to determine when cooling mode will begin and when CSP1 and CSP2 will be used for leaving set point.

Based on LC.OF, the control point transitions between CSP1 and CSP2. LC.OF is used to calculate the space temperature at which control point is raised based on space temperature vs space temperature set point (SPS.P) plus

LC.ON minus LC.OF. The control point transition from CSP2 to CSP1 occurs when space temperature is below LC.OF divided by 2.

For example (see Fig. 29):

Given: SPS.P = 72 F, LC.ON = 1, HC.ON = 3,

LC.OF = 2 F, CSP1 = 60 F, and CSP2 = 55 F

If space temperature equals 73 F (72+1) (Low Cool)

cooling will begin and control set point equals 60 F

(CSP1).

If space temperature is greater than 76 F (72+1+3 = 76)

(High Cool), control point set point would equal 55 F

(CSP2).

If space temperature falls below 72 F (73-2/2) (Low

Cool minus LC.OF/2), control point transitions back to

60 F CSP1 if space continues to fall below 71 F (73-2)

(Low Cool minus LC.OF), the unit is shut off.

76 F

H.C.ON

73 F

L.C.ON

L.C. OF

Cooling Setpoint

L.C. OF/2

Hi Cool End 72 F72 F

Lo Cool End 71 F

• C.TYP = 7 (% CAPACITY) configuration will force the MBB to monitor the input 4-20 cooling demand CL.MA and translate this into desired % capacity for the unit. The control will attempt to match the desired capacity insuring the unit operates the compressor within compressor safeties and timeguards. (Requires the EMM option or accessory.)

• C.TYP = 9 (VAV-SETPOINT) configuration will force the MBB to operate as a VAV unit and control capacity to meet supply air temperature. The control point is developed from the 4-20 cooling demand CL.MA input value. The 4 to 20 mA input will be translated into a desired control point ranging from 40 to 80 F. The control will translate the input linearly with 4 mA equal to 40 F set point and 20 mA equal to 80 F set point. (Requires the EMM option or accessory.)

Capacity Control Logic when Control is Controlling to Supply Temperature — The control system cycles compressors, hot gas bypass and the digital compressor to maintain the supply temperature at or close to the control point of the unit. The SAT and RAT sensors are used by the main base board (MBB) to determine the temperature drop across the evaporator and are used in determining the optimum time to add or subtract capacity stages. The CSP set points can be automatically reset by

24

Hi Cool Start

Lo Cool Start

the return temperature, space, or outdoor-air temperature reset features. It can also be reset from an external 4 to 20 mA signal (requires energy management module factory-installed option or field-installed accessory).

The control has an automatic lead-lag feature built in which determines the wear factor (combination of starts and run hours) for each compressor. If all compressors are off and less than 30 minutes has elapsed since the last compressor was turned off, the wear factor is used to determine which compressor to start next. As additional stages of compression are required, the processor control will add them. If a circuit is to be stopped, the compressor with the lowest wear factor will be

The capacity control algorithm runs every 30 seconds. The algorithm attempts to maintain the control point at the desired set point. Each time it runs, the control reads the entering and leaving temperatures. The control determines the rate at which conditions are changing and calculates 2 variables based on these conditions. Next, a capacity ratio is calculated using the 2 variables to determine whether or not to make any changes to the current stages of capacity. This ratio value ranges from –100 to +100%. If the next stage of capacity is a compressor, the control starts (stops) a compressor when the ratio reaches +100% (-100%). A delay of 90 seconds occurs after each capacity step change. Refer to Table 8.

shut off first. See Table 7 for compressor size information and Table 8 for compressor loading sequence.

Table 7 — Compressor Size Information

UNIT SIZE

38APS025 11 11 — — — — 38APD025 11 — — 11 — — 38APS027 13 13 — — — — 38APD027 13 — — 13 — — 38APS030 15 15 — — — — 38APD030 15 — — 15 — — 38APS040 13 13 13 — — — 38APD040 10 10 — 9 9 — 38APS050 15 15 15 — — — 38APD050 12 12 — 13 13 — 38APD060 13 13 — 15 15 — 38APD070 15 15 — 11 11 11 38APD080 15 15 — 15 15 15 38APD090 13 13 13 15 15 15 38APD100 15 15 15 15 15 15

Compressor A1 Compressor A2 Compressor A3 Compressor B1 Compressor B2 Compressor B3

CIRCUIT A (Nominal hp) CIRCUIT B (Nominal hp)

Table 8 — Part Load Data Percent

38AP UNIT SIZE

38APS025-030

38APD025-030

38APS040,050

38APD040

38APD050,060

38APD070

38APD080

38APD090

38APD100

NOTES:

1. These capacity steps may vary due to different capacity staging sequences.

CONTROL

STEPS

150A1—— 2 100 A1,A2 — —

1 50A150B1 2 100 A1, B1 100 A1,B1

133A1—— 267A1,A2—— 3 100 A1,A2,A3 — —

127A123B1 2 50 A1,B1 50 A1,B1 3 77A1,A2,B1 73A1,B1,B2 4 100 A1,A2,B1,B2 100 A1,A2,B1,B2

123A127B1 2 50 A1,B1 50 A1,B1 3 73A1,A2,B1 77A1,B1,B2 4 100 A1,A2,B1,B2 100 A1,A2,B1,B2

1 15A115B1 2 42 A1,B1 42 A1,B1 3 57A1,A2,B157A1,B1,B2 4 85 A1,A2,B1,B2 85 A1,A2,B1,B2 5 100 A1,A2,B1,B2,B3 100 A1,A2,B1,B2,B3

1 20A120B1 2 40 A1,B1 40 A1,B1 3 60A1,A2,B160A1,B1,B2 4 80 A1,A2,B1,B2 80 A1,A2,B1,B2 5 100 A1,A2,B1,B2,B3 100 A1,A2,B1,B2,B3

1 15A118B1 2 32 A1,B1 32 A1,B1 3 48A1,A2,B151A1,B1,B2 4 66 A1,A2,B1,B2 66 A1,A2,B1,B2 5 82 A1,A2,A3,B1,B2,B3 85 A1,A2,B1,B2,B3 6 100 A1,A2,A3,B1,B2,B3 100 A1,A2,A3,B1,B2,B3

1 17A117B1 2 33 A1,B1 33 A1,B1 3 50A1,A2,B150A1,B1,B2 4 67 A1,A2,B1,B2 67 A1,A2,B1,B2 5 83A1,A2,A3,B1,B283A1,A2,B1,B2,B3 6 100 A1,A2,A3,B1,B2,B3 100 A1,A2,A3,B1,B2,B3

% Displacement Compressor % Displacement Compressor

LOADING SEQUENCE A LOADING SEQUENCE B

2. When unit is equiped with digital scroll option, sequence A is always used.

25

MINUTES LEFT FOR START — This value is displayed





only in the network display tables (using Service Tool, ComfortVIEW™ or ComfortWORKS

®

software) and represents the amount of time to elapse before the unit will start its initialization routine. This value can be zero without the machine running in many situations. This can include being unoccupied, ENABLE/OFF/REMOTE CONTACT switch in the OFF position, CCN not allowing unit to start, Demand Limit in effect, no call for cooling due to no load, and alarm or alert conditions present. If the machine should be running and none of the above are true, a minimum off time (DELY, see below) may be in effect. The machine should start normally once the time limit has expired.

MINUTES OFF TIME (Configuration OPT2

DELY) — This user-configurable time period is used by the control to determine how long unit operation is delayed after power is applied/restored to the unit. Typically, this time period is configured when multiple machines are located on a single site. For example, this gives the user the ability to prevent all the units from restarting at once after a power failure. A value of zero for this variable does not mean that the unit should be running. NOTE: If the unit has digital scroll or hot gas bypass, circuit A is always lead.

LEAD/LAG DETERMINATION — This is a configurable choice and is factory set to be automatic for all units. The value can be changed to Circuit A or Circuit B leading as desired. Set at automatic, the control will sum the current number of logged circuit starts and one-quarter of the current operating hours for each circuit. The circuit with the lowest sum is started first. Changes to which circuit is the lead circuit and which is the lag are also made when total machine capacity is at 100% or when there is a change in the direction of capacity (increase or decrease) and each circuit’s capacity is equal.

CAPACITY CONTROL OVERRIDES — The following overrides will modify the normal operation of the routine.

Deadband Multiplier

— The user configurable deadband mul-

tiplier (Configuration SLCT Z.GN) has a default value of

1.0. The range is from 1.0 to 4.0. When set to other than 1.0, this factor is applied to the capacity Load/Unload Factor. The larger this value is set, the longer the control will delay between adding or removing stages of capacity.

First Stage Override

— If the current capacity stage is zero, the control will modify the routine with a 1.2 factor on adding the first stage to reduce cycling. This factor is also applied when the control is attempting to remove the last stage of capacity.

Slow Change Override

— This control prevents the capacity

stages from being changed when the supply temperature is

Table 9 — Fan Stages

38AP UNIT SIZE

025-030

040,050

060

070

080

090,100

* Fan Stage 1 on unit size 070 is used only when ambient temperature is less than 32 F.

CIRCUIT A STAGES/COMMON FAN STAGES CIRCUIT B FAN STAGES

Fan Stage Contactor Energized Fans Operating Fan Stage Contactor Energized Fans Operating

Stage 1 Stage 2

Stage 1 Stage 2 Stage 3

Stage 1 Stage 2 Stage 3 Stage 4

Stage 1* Stage 2 Stage 3

Stage 1 Stage 2

Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6

FC1

FC1,2

FC1 FC2

FC1,2

FC1 FC2

FC1,2

FC1,2,3

FC2,4

FC1

FC1,3

FC1

FC1,3

FC4

FC1 FC4,1 FC4,3 FC1,3

FC4,1,3

OFM1

OFM1,2

OFM3

OFM1,2

OFM1,2,3

OFM3

OFM1,2

OFM1,2,3

OFM1,2,3,4

OFM1,2

OFM3

OFM3,4

OFM5

OFM5,6,(2)

OFM3 OFM5

OFM3,5 OFM3,(2),4,6 OFM5,(2),4,6

OFM3,5,(2),4,6

close to the set point (within an adjustable deadband) and moving toward the set point.

Ramp Loading

— The ramp loading control (Configuration

SLCT CRMP) limits the rate of change of supply temperature. If the unit is in a Cooling mode and configured for Ramp Loading, the control makes 2 comparisons before deciding to change stages of capacity. The control calculates a temperature difference between the control point and supply temperature. If the difference is greater than 4° F (2.2° C) and the rate of change (°F or °C per minute) is more than the configured Cooling Ramp Loading value (CRMP), the control does not allow any changes to the current stage of capacity.

Minimum Load Control

— If equipped, the minimum load control valve is energized only when one compressor on the circuit is running and the unit is unloading.

Low Saturated Suction Protection

— The control will try to prevent shutting a circuit down due to low saturated suction conditions by removing stages of capacity. See Alerts section.

Head Pressure Control — The main base board

(MBB) controls the condenser fans to maintain the lowest condensing temperature possible, and thus the highest unit efficiency. The MBB uses the saturated condensing temperature input from the discharge pressure transducer and outside air temperature sensor to control the fans. If OAT is greater than 70 F before a circuit is starting, then all condenser fan stages will be energized. A fan stage is increased based on SCT. When the highest SCT of both circuits is greater than fan on set point, then an additional stage of fan will be added to the current fan stage. Fan On Set Point (F. O N ) equals Head Set Point ON (115 F) except after a fan stage increase when Head Set Point is increased by Fan Stage Delta (10 F). A fan stage is decreased when the SCTs of both circuits are less than fan off set point for two minutes. Fan Off Set Point (F. O F F ) equals Head Set Point OFF (–72 F). Table 9 shows the number of fan stages, contactors energized and the fans that are on during the fan stage. Unit sizes 025 to 060 have common fan control. Unit sizes 070 to 100 have some fans that are common and some that are controlled individually. Figure 30 shows the location of each fan and compressor within the unit.

MOTORMASTER tion, the first stage of fans is equipped with the Motormaster V head pressure controller option or accessory. For units with common fans, the control will control the Head Pressure Setpoint (–10 F) and the highest SCT to try to maintain it at 100 F. Unit sizes 070 to 100 have one Motormaster V for each circuit and the control tries to maintain SCT at 100 F for the circuit. The controller is given an ON command with the first stage of fan and adjusts fan speed.

Stage 1* Stage 2 Stage 3

Stage 1 Stage 2 Stage 3

Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6

®

V OPTION — For low-ambient opera-

———

FC1,3

FC2

FC2,4

FC4

FC3,4

FC2,3,4

FC4

FC2 FC4,2 FC4,3 FC2,3

FC4,2,3

OFM3,4

OFM1

OFM1,2

OFM3

OFM3,2,(6)

OFM3,1,2,(6)

OFM3 OFM1

OFM3,1 OFM3,2,4,(6) OFM1,2,4,(6)

OFM3,1,2,4,(6)

26

Outdoor Fan Layout – Top View

Sizes 025-030 Sizes 040, 050 Sizes 060, 070

CONTROL BOX

OFM1

OFM2 OFM2

OFM3

OFM1

CONTROL BOX

OFM3

OFM4

OFM2

OFM1

Size 080 Sizes 090, 100

CONTROL BOX

OFM2

OFM3

OFM5

OFM6

OFM1

CONTROL BOX

OFM4

OFM5

OFM6

OFM2

OFM3

OFM1

Compressor Layout Dual Circuit – Top View

Sizes 025-030 Sizes 040-060 Sizes 070, 080

CONTROL BOX

1

B1

CONTROL BOX

B1

B2

1

2

CONTROL BOX

B1

B2

2

1

B3

Sizes 090, 100

CONTROL BOX

B1

B2

B3

3

2

1

Sizes 025-030 Sizes 040, 050

CONTROL BOX

Compressor Layout Single Circuit – Top View

1

2

1

2

3

Fig. 30 — Compressor and Fan Location

A

27

Service Test — Both main power and control circuit

ENTER

ESCAPE







power must be on.

The Service Test function should be used to verify proper operation of condenser fan(s), compressors, minimum load valve solenoid (if installed), liquid line solenoid valve (if installed), and remote alarm relay. To use the Service Test mode, the Enable/Off/Remote Contact switch must be in the OFF position. Use the display keys and Service Test Mode and Sub-Mode Directory table in Appendix A to enter the mode and display TEST. Press twice so that OFF flashes. Enter the password if required. Use either arrow key to change the TEST value to the ON position and press . Place the Enable/Off/Remote Contact switch in the ENABLE position. The Service Test mode is now enabled. Press and the down key to enter the OUTS, COMPA or COMPB sub-mode.

Test the condenser fans, liquid line solenoid and alarm relay by changing the item values from OFF to ON. These discrete outputs are then turned off if there is no keypad activity for 10 minutes. When testing the digital output the display can be changed from 1 to 15 by using either the up or down arrow; the number represents the cycle rate out of a 15 second duty cycle that the output will be energized. If the cycle is set for 7, the output will be energized 7 seconds out of every 15 seconds. Test the compressor and minimum load valve solenoid (if installed) outputs in a similar manner. The minimum load valve solenoids will be turned off if there is no keypad activity for 10 minutes. Compressors will stay on until they are turned off by the operator. The Service Test mode will remain enabled for as long as there is one or more compressors running. All safeties are monitored during this test and they will turn a compressor, circuit or the machine off if required. Any other mode or sub-mode can be accessed, viewed, or changed during the TEST mode. The STAT item (Run/Status VIEW) will display "0" as long as the Service mode is enabled. The TEST sub-mode value must be changed back to OFF before the unit can be switched to Enable or Remote contact for normal operation.

Operating Modes

RAMP LOAD LIMITED (MD05) — Ramp load (pulldown) limiting is in effect. In this mode, the rate at which supply fluid temperature is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling Ramp Loading (Configuration SLCT CRMP). The pull-down limit can be modified, if desired, to any rate from 0.2 to 2° F (0.1 to 1° C) per minute.

TIMED OVERRIDE IN EFFECT (MD06) — Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed schedule, forcing unit to Occupied mode. Override can be implemented with unit under Local (Enable) or CCN (Carrier Comfort Network ter each use.

SLOW CHANGE OVERRIDE (MD09) — Slow change override is in effect. The supply fluid temperature is close to and moving towards the control point.

MINIMUM OFF TIME ACTIVE (MD10) — Unit is being held off by Minutes Off Time (Configuration OPT2 DELY).

TEMPERATURE RESET (MD14) — Temperature reset is in effect. In this mode, unit is using temperature reset to adjust supply fluid set point upward and is currently controlling to the modified set point. The set point can be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to 20 mA signal.

DEMAND LIMITED (MD15) — Demand limit is in effect. This indicates that the capacity of the unit is being limited by

®

) control. Override expires af-

demand limit control option. Because of this limitation, the unit may not be able to produce the desired supply fluid temperature. Demand limit can be controlled by switch inputs or a 4 to 20 mA signal.

LOW TEMPERATURE COOLING (MD17) — Unit is in Cooling mode and the rate of change of the supply fluid is negative and decreasing faster than -0.5° F per minute. Error between supply fluid and control point exceeds fixed amount. Control will automatically unload the unit if necessary.

HIGH TEMPERATURE COOLING (MD18) — Unit is in Cooling mode and the rate of change of the supply fluid is positive and increasing. Error between supply fluid and control point exceeds fixed amount. Control will automatically load the unit if necessary to better match the increasing load.

TIME GUARD ACTIVE (MDTG) — Compressor time guard is active, preventing the compressor from starting.

HIGH SCT CIRCUIT A (MD21) — Unit is in a Cooling mode and the saturated condensing temperature (SCT) is greater than the calculated maximum limit. No additional stages of capacity will be added. Unit capacity may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature.

HIGH SCT CIRCUIT B (MD22) — Unit is in a Cooling mode and the saturated condensing temperature (SCT) is greater than the calculated maximum limit. No additional stages of capacity will be added. Unit capacity may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature.

MINIMUM COMP ON TIME (MD23) — Cooling load may be satisfied, however control continues to operate compressor to ensure proper oil return. This may be an indication of oversized application, low fluid flow rate or low loop volume.

LOW SOUND MODE (MD25) — Not applicable.

Operation of Machine Based on Control Method —

the configuration of the control method (Configuration OPT2 CTRL). With the control method set to 0, simply switching the Enable/Off/Remote Contact switch to the Enable or Remote Contact position (external contacts closed) will put the unit in an occupied state. The control mode (Operating Modes MODE) will be 1 (OFF LOCAL) when the switch is Off and will be 5 (ON LOCAL) when in the Enable position or Remote Contact position with external contacts closed.

Two other control methods are available for Machine On/

Off control: OCCUPANCY SCHEDULE (CTRL=2) — The main base

board will use the operating schedules as defined under the Time Clock mode in the scrolling marquee display. These schedules are identical. The schedule number must be set to 1 for local schedule.

The schedule number can be set anywhere from 65 to 99 for operation under a CCN global schedule. The Enable/Off/ Remote Contact must be in the Enable or Remote Contact position. The control mode (Operating Modes MODE) will be 1 when the switch is Off. The control mode will be 3 when the Enable/Off/Remote Contact switch input is On and the time of day is during an unoccupied period. Similarly, the control mode will be 7 when the time of day is during an occupied period.

CCN SCHEDULE (CTRL=3) — An external CCN device controls the On/Off state of the machine. This CCN device forces the variable 'CHIL_S_S' between Start/Stop to control the unit. The control mode (Operating Modes MODE) will be 1 when the switch is Off. The control mode will be 2 when the Enable/Off/Remote Contact switch input is On and the

Machine On/Off control is determined by

28

CHIL_S_S variable is 'Stop.' Similarly, the control mode will





64

62

60

58

56

54

52

17.8

16.7

15.6

14.4

13.3

12.2

11.1

40 45 50 55 60 65 70 75 80 85 90

4.4 7.2 10.0 12.8 15.6 18.3 21.1 23.9 26.7 29.4 32.2

OUTSIDE TEMPERATURE (F)

OUTSIDE TEMPERATURE (C)

SAT TEMPERATURE (F)

MAXIMUM RESET

RESET SET POINT

CHILLED SET POINT

CHANGE IN SAT SET POINT

CHANGE IN

RESET TEMPERATURE

SAT

SAT TEMPERATURE (C)

LEGEND

Fig. 31 — Outdoor-Air Temperature Reset

SAT — Supply Air Temperature

LEGEND

Fig. 32 — Space Temperature Reset

SAT — Supply Air Temperature

be 6 when the CHIL_S_S variable is 'Start.'

Set Point Adjustment

CV SET POINT ADJUSTMENT — If the unit is configured for control type SPT MULTI (C.TYP =5) and the Space Temperature Offset Sensor is enabled. (SP.O.S) set to enable [Configuration OPT1]. Space temperature offset corresponds to a slider on a T56 sensor that allows the occupant to adjust the space temperature by a configured range during an occupied period. The space temperature offset range (SP.O.R) value is either added or subtracted from the space temperature cool set point. Example SPS.P equals 72 F and SP.O.R equals 5 then the cooling set point can be adjusted from 68 to 77 F by adjusting the T56 slider.

ITEM EXPANSION RANGE UNITS CCN POINT

SP.O.S

SP.O.R

Space Temp

Offset Sensor

Space Temp

Offset Range

VAV SUPPLY AIR TEMPERATURE RESET — The control system is capable of changing the controlling set point based on several different methods. The methods are return temperature, space temperature (SPT), outside air temperature (OAT) and from an externally powered 4 to 20 mA signal. Return air is a measure of the building load. The return temperature reset is in effect an average building load reset method. An accessory sensor must be used for SPT reset; either a T55, T56, or T59 sensor can be used. The energy management module (EMM) must be used for temperature reset using a 4 to 20 mA signal. To use 4 to 20 mA reset, one variable must be configured MA.DG, which is the amount of reset desired with a 20 mA signal. The control will interpolate between 0 degrees reset at 4 mA and the value entered for MA.DG at 20 mA. See Table 10 for an example of 4 to 20 mA reset.

Enable/ Disable

1-10 SPTO_RNG

SPTOSENS

be set to the temperature difference where the maximum reset should occur. The variable RM.DG

should be set to the maximum amount of reset desired. To verify that reset is functioning correctly proceed to Run Status mode, sub-mode VIEW, and subtract the active set point (SETP) from the con- trol point (CTPT) to determine the degrees reset. Under normal operation, the unit will maintain a constant leaving temperature approximately equal to the cooling set point. As the unit load varies, the return air temperature will change in proportion to the load. Usually the unit size and supply air temperature set point are selected based on a full-load condition. At part load, the air temperature set point may be colder than required. If the leaving air temperature was allowed to increase at part load, the efficiency of the machine would increase.

Return temperature reset allows for the leaving temperature set point to be reset upward as a function of the return air temperature or, in effect, the building load.

Figures 31 and 32 are examples of outdoor air and space temperature reset.

CAUTION

Care should be taken when interfacing with other control systems due to possible power supply differences; full wave bridge versus half wave rectification. Connection of control devices with different power supplies may result in permanent equipment damage. ComfortLink™ controls incorporate power supplies with half wave rectification. A signal isolation device should be utilized if the signal generator incorporates a full wave bridge rectifier.

To use Outdoor Air or Space Temperature reset, four variables must be configured. In the Configuration mode under the sub-mode RSET, items CRST, RM.NO, RM.F and RT.DG must be properly set. See Table 11. The outdoor air reset example provides 0° F (0° C) reset to the active set point at 85 F (29.4 C) outdoor-air temperature and 6 F (3.3 C) reset at 55 F (12.8 C) outdoor-air temperature. See Fig 31. The space temperature reset example provides 0° F (0° C) reset to the active set point at 72 F (22.2 C) space temperature and 6 F (3.3 C) reset at 68 F (20.0 C) space temperature. See Fig 32. The variable CRST should be configured for the type of reset desired. The variable RM.NO should be set to the temperature that no reset should occur. The variable RM.F should be set to the tempera- ture that maximum reset is to occur. The variable RM.DG should be set to the maximum amount of reset desired.

To use Return reset, four variables must be configured. In the Configuration mode under the sub-mode RSET, items CRST, RT.NO, RT.F and RT.DG must be properly set. See Table 12.

This example provides 5 F (2.8 C) active set point reset at 2 F (1.1 C) T and 0° F (0° C) reset at 10 F (5.6 C) T. The variable RT.NO should be set to the air temperature difference ( T) where no reset should occur. The variable RT.F should

29

SAT TEMPERATURE (C)

17.8

16.7

15.6

14.4

13.3

12.2

11.1

64

62

60

58

MAXIMUM RESET

56

SAT TEMPERATURE (F)

54

52

65 66 67 68 69 70 71 72 73 74

18.3 18.9 19.4 20.0 20.6 21.1 21.7 22.2 22.8 23.3

SPACE TEMPERATURE (F)

SPACE TEMPERATURE (C)

CHANGE IN

RESET TEMPERATURE

SAT

RESET SET POINTCHILLED SET POINT

CHANGE IN SAT SET POINT

Table 10 — 4 to 20 mA Reset

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

RSET

CRST 1

MA.DG

5.0 F

(2.8 C)

NOTE: The example above shows how to configure the unit for 4 to 20 mA reset. No reset will occur at 4.0 mA input, and a 5.0 F reset will occur at 20.0 mA. An energy management module is required.

Table 11 — Configuring Outdoor Air and Space Temperature Reset

MODE

(RED LED)

CONFIGURATION

*1 item skipped in this example.

KEYPAD

ENTRY

SUB-

MODE

KEYPAD

ENTRY

ITEM

DISP

UNIT

OPT1

OPT2

M.MST

RSET CRST 2 4

RM.NO* 85 °F 72 °F

RM.F 55 °F 68 °F

RM.DG 15 °F 6 °F

ITEM

EXPANSION

COOLING RESET

TYPE

4-20 mA DEGREES RESET

DISPLAY

Outdoor

Air

Space

COOLING RESET

REMOTE - FULL

REMOTE - DEGREES

COMMENT

0 = no reset 1 = 4 to 20 mA Input 2 = Outdoor Air Temp 3 = Return Fluid 4 = Space Temperature

Default: 0° F (0° C) Reset at 20 mA Range: –30 to 30 F (–16.7 to 16.7 C)

ITEM

EXPANSION

2 = Outdoor-Air Temperature

TYPE

REMOTE - NO RESET TEMP

RESET TEMP

RESET

4 = Space Temperature (Connect to LTV-21,22)

Default: 125.0 F (51.7 C) Range: 0° to125 F

Default: 0.0° F (-17.7 C) Range: 0° to 125 F

Default: 0° F (0° C) Range: –30 to 30 F (–34.4 to -1.1 °C)

COMMENT

(-17.7 to 51.7 C)

MODE

(RED LED)

KEYPAD

ENTRY

CONFIGURATION

*4 items skipped in this example.

Table 12 — Configuring Return Temperature Reset

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

DISP

UNIT

CNN

OPT1

OPT2

M.MST

RSET CRST* 3

RT.NO* 10°

RT.F 0°

RT.DG 5° F

F

RETURN - DEGREES

ITEM

EXPANSION

COOLING

RESET TYPE

RETURN - NO RESET TEMP

RETURN - FULL

RESET TEMP

RESET

COMMENT

0 = No Reset 1 = 4 to 20 mA Input (EMM required) 2 = Outdoor-Air Temperature 3 = Return Air Temperature 4 = Space Temperature

Default: 10° Range: 0° to 30 F

Default: 0° Range: 0° to 10 F T (-17.7 to –12.2 C)

Default: 0° Range: –30 to 30°F (–16.7 to 16.7 C)

F (5.6° C)

T (-17.7 to 16.7 C)

F (–17.8° C)

F (0° C)

30

Demand Limit — Demand Limit is a feature that allows





ENTER

the unit capacity to be limited during periods of peak energy usage. There are 3 types of demand limiting that can be configured. The first type is through 2-stage switch control, which will reduce the maximum capacity to 2 user-configurable percentages. The second type is by 4 to 20 mA signal input which will reduce the maximum capacity linearly between 100% at a 4 mA input signal (no reduction) down to the userconfigurable level at a 20 mA input signal. The third type uses the CCN loadshed module and has the ability to limit the current operating capacity to maximum and further reduce the capacity if required.

NOTE: The 2-stage switch control and 4 to 20 mA input signal types of demand limiting require the energy management module (EMM).

To use Demand Limit, select the type of demand limiting to use. Then configure the Demand Limit set points based on the type selected.

DEMAND LIMIT (2-Stage Switch Controlled) — To configure Demand Limit for 2-stage switch control, set the Demand Limit Select (Configuration RSET DMDC) to 1. Then configure the 2 Demand Limit Switch points (Configuration RSET DLS1 and DLS2) to the desired capacity limit. See Table 13. Capacity steps are controlled by 2 relay switch inputs field wired to low voltage terminal (LVT) strip terminal 3-6. Refer to the unit wiring diagram for these connections.

For Demand Limit by 2-stage switch control, closing the first stage demand limit contact will put the unit on the first demand limit level. The unit will not exceed the percentage of capacity entered as Demand Limit Switch 1 set point. Closing contacts on the second demand limit switch prevents the unit

Table 13 — Configuring Demand Limit

MODE

CONFIGURATION

KEYPAD

ENTRY

SUB-MODE

DISP

UNIT

KEYPAD

ENTRY

ITEM DISPLAY ITEM EXPANSION COMMENT

from exceeding the capacity entered as Demand Limit Switch 2 set point. The demand limit stage that is set to the lowest demand takes priority if both demand limit inputs are closed. If the demand limit percentage does not match unit staging, the unit will limit capacity to the closest capacity stage.

To disable demand limit, configure the DMDC to 0. See

Table 13. EXTERNALLY POWERED DEMAND LIMIT (4 to

20 mA Controlled) — To configure Demand Limit for 4 to 20 mA control, set the Demand Limit Select (Configura- tion RSET DMDC) to 2. Then configure the Demand Limit at 20 mA (Configuration RSET DM20) to the maximum loadshed value desired. Connect the output from an externally powered 4 to 20 mA signal to terminal block LVT strip terminals 7 and 8. Refer to the unit wiring diagram for these connections to the optional/accessory energy management module and terminal block. The control will reduce allowable capacity to this level for the 20 mA signal. See Table 13 and Fig. 33.

CAUTION

Care should be taken when interfacing with other manufacturer’s control systems, due to possible power supply differences, full wave bridge versus half wave rectification. The two different power supplies cannot be mixed. Com- fortLink™ controls use half wave rectification. A signal isolation device should be utilized if a full wave bridge signal generating device is used. Failure to comply could result in possible equipment damage.

*Seven items skipped in this example.

CCN

OPT1

OPT2

M.MST

RSET CRST X Cooling Reset Type

DMDC* X Demand Limit Select

DM20 XXX % Demand Limit at 20 mA

SHNM XXX Loadshed Group Number

SHDL XXX% Loadshed Demand Delta

SHTM XXX MIN Maximum Loadshed Time

DLS1 XXX % Demand Limit Switch 1

DLS2 XXX % Demand Limit Switch 2

Default: 0 0 = None 1 = Switch 2 = 4 to 20 mA Input 3 = CCN Loadshed

Default: 100% Range: 0 to 100

Default: 0 Range: 0 to 99

Default: 0% Range: 0 to 60%

Default: 60 min. Range: 0 to 120 min.

Default: 80% Range: 0 to 100%

Default: 50% Range: 0 to 100%

31

DEMAND LIMIT (CCN Loadshed Controlled) — To con-







ENTER

50% CAPACITY AT 20 mA

0

2

4

6

8

10

12

14

16 18

20

100

80

60

40

20

0

MAX.

ALLO

W

ABLE LO

AD (%

)

100% CAPACITY AT 4mA

75% CAPACITY AT 12 mA

50% CAPACITY AT 12 mA

DM20 = 50

DM20 = 0

DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT

Fig. 33 — 4 to 20 mA Demand Limiting — Demand Limit Select (DMDC = 2)

figure Demand Limit for CCN Loadshed control, set the Demand Limit Select (Configuration RSET DMDC) to 3. Then configure the Loadshed Group Number (Configura-

tion RSET SHNM), Loadshed Demand Delta (Configuration RSET SHDL), and Maximum Loadshed Time

(Configuration RSET SHTM). See Table 13.

The Loadshed Group number is established by the CCN system designer. The ComfortLink controls will respond to a Redline command from the Loadshed control. When the Redline command is received, the current stage of capacity is set to the maximum stages available. Should the loadshed control send a Loadshed command, the ComfortLink controls will reduce the current stages by the value entered for Loadshed Demand delta. The maximum loadshed time is the maximum length of time that a loadshed condition is allowed to exist. The control will disable the Redline/Loadshed command if no Cancel command has been received within the configured maximum loadshed time limit.

Cooling Set Point (4 to 20 mA) — A field supplied

and generated, externally powered 4 to 20 mA signal can be used to provide the leaving temperature set point. The energy management module (EMM) must be used for cooling set point control using a 4 to 20 mA signal. To use the 4 to 20 mA set point, the unit type must be configured for control type VAV set point (Configuration OPT2 C.TYP = 9). Once configured, the control will translate the input linearly with 4 mA equal to 40 F set point and 20 mA equal to 80 F set point. Connect the signal to LVT strip terminal 10,8 (+,-). See Table 14 for instructions to enable the function. Figure 34 shows how the 4 to 20 mA signal is linearly calculated.

Digital Scroll Option — The 38AP units have a

factory-installed option for a digital scroll compressor which provides additional stages of unloading for the unit. The digital

Table 14 — Configuration VAV 4 to 20 mA Set Point

compressor is always installed in the A1 compressor location. When a digital compressor is installed, a digital unloader solenoid (DUS) is used on the digital compressor.

DIGITAL SCROLL OPERATION — A digital scroll operates in two stages - the "loaded state" when the solenoid valve is normally closed and the "unloaded state" when the solenoid valve is open. During the loaded state, the compressor operates like a standard scroll and delivers full capacity and mass flow.

However, during the unloaded state, there is no capacity and no mass flow through the compressor. The capacity of the system is varied by varying the time the compressor operates in an unloaded and loaded state during a 15-second period. If the DUS is energized for 7.5 seconds, the compressor will be operating at 50% capacity. If the DUS is energized for 11 seconds, the compressor will be operating at approximately 25% of its capacity. Capacity is the time averaged summation of loaded and unloaded states, and its range is continuous from 10% to 100%. Regardless of capacity, the compressor always rotates with constant speed. As the compressor transitions from a loaded to unloaded state, the discharge and suction pressures will fluctuate and the compressor sound will change.

The ComfortLink controller controls and integrates the operation of the DUS into the compressor staging routine to maintain temperature control. When a digital compressor is installed, an additional discharge gas thermistor (DTT) is installed along with the AUX board for control of the DUS.

DIGITAL COMPRESSOR CONFIGURATION — When a digital compressor is installed, the configuration parameter Configuration Unit A1.TY is configured to YES. There is also a maximum unload time configuration, Configuration

Unit MAX.T, that is set to 7 seconds, which indicates the maximum unloading for the digital compressor is 50%. This is done to optimize efficiency of the system.

MODE

(RED LED)

CONFIGURATION

KEYPAD

ENTRY

SUB-MODE

DISP

UNIT

CCN

OPT1

OPT2 C.TYP 4 Unit Options 2 Controls

KEYPAD

ENTRY

ITEM DISPLAY ITEM EXPANSION COMMENT

C.TYP 9 Machine Control Type

32

1 = VAV 3 = Tstat Multi 4 = Tstat 2 Stage 5 = SPT Multi 7 = PCT CAP 8 = Dual Stat 9 = VAV Set Point

(F)

90

80

70

60

50

40

30

20

10

0

(C)

32.2

26.7

21.1

15.6

10.0

4.4

-1.1

-6.7

-12.2

-17.8

SUPPLY SETPOINT

0 5 10 15 20

SETPOINT SIGNAL – 4-20 mA INPUT

Fig. 34 — 4 to 20 mA Supply Set Point

PRE-START-UP

IMPORTANT: Before beginning Pre-Start-Up or Start-Up, review Start-Up Checklist at the back of this publication. The checklist assures proper start-up of a unit and provides a record of unit condition, application requirements, system information, and operation at initial start-up.

Do not attempt to start the air-conditioning system until the

following checks have been completed.

System Check

1. Check all system components, including the air-handling equipment. Consult manufacturer's instructions. If the unit has field-installed accessories, be sure all are properly installed and wired correctly. Refer to unit wiring diagrams.

2. Open liquid line and suction line service valves.

3. Check tightness of all electrical connections.

4. Oil should be visible in the compressor sight glasses. An acceptable oil level in the compressor is from sight glass. Adjust the oil level as required. No oil should be removed unless the crankcase heater has been energized for at least 24 hours. See Add Oil section on page 47, for Carrier-approved oils.

5. Electrical power source must agree with unit nameplate.

6. Crankcase heaters must be firmly attached to compressors, and must be on for 24 hours prior to start-up.

7. Fan motors are 3-phase. Check rotation of fans during first start-up check.

EVACUATION AND DEHYDRATION — Because the 38AP systems use polyolester (POE) oil, which can absorb moisture, it is important to minimize the amount of time that the system interior is left exposed to the atmosphere. Minimizing the exposure time of the oil to the atmosphere will minimize the amount of moisture that needs to be removed during evacuation.

Once all of the piping connections are complete, leak test the unit and then pull a deep dehydration vacuum. Connect the vacuum pump to the charging valve in the suction line and to the liquid line service valve. For best results, it is recommended that a vacuum of at least 500 microns (0.5 mm Hg) be obtained. Afterwards, to ensure that no moisture is present in the system, perform a standing vacuum-rise test.

1

/8 to 3/8 of

With the unit in deep vacuum (500 microns or less), isolate the vacuum pump from the system. Observe the rate-of-rise of the vacuum in the system. If the vacuum rises by more than 50 microns in a 30-minute time period, then continue the dehydration process. Maintain a vacuum on the system until the standing vacuum requirement is met. This will ensure a dry system.

By following these evacuation and dehydration procedures, the amount of moisture present in the system will be minimized. It is required that liquid line filter driers be installed between the condenser(s) and the expansion devices to capture any foreign debris and provide additional moisture removal capacity.

START-UP

IMPORTANT: Before beginning Pre-Start-Up or Start-Up, review Start-Up Checklist at the back of this publication. The checklist assures proper start-up of a unit and provides a record of unit condition, application requirements, system information, and operation at initial start-up.

CAUTION

Crankcase heaters on all units are wired into the control circuit, so they are always operable as long as the main power supply disconnect is on (closed), even if any safety device is open. Compressor heaters must be on for 24 hours prior to the start-up of any compressor. Equipment damage could result if heaters are not energized for at least 24 hours prior to compressor start-up.

Compressor crankcase heaters must be on for 24 hours before start-up. To energize the crankcase heaters, close the field disconnect and turn on the fan circuit breakers. Leave the compressor circuit breakers off/open. The crankcase heaters are now energized.

Preliminary Charge — Refer to GTAC II (General

Training Air Conditioning), Module 5, Charging, Recovery, Recycling, and Reclamation for charging procedures. Using the liquid charging method and charging by weight procedure, charge each circuit with the amount of Puron (R-410A) listed in Table 15.

®

refrigerant

33

Table 15 — Preliminary Puron Refrigerant (R-410A)

Charge, lb (kg)

38AP UNIT SIZE CIRCUIT A CIRCUIT B

38APS025 24 (10.9) — 38APD025 12 (5.6) 12 (5.6) 38APS027 26 (11.6) — 38APD027 13 (6.0) 13 (6.0) 38APS030 29 (12.9) — 38APD030 14 (6.5) 14 (6.5) 38APS040 39 (17.7) — 38APD040 21 (9.5) 17 (7.8) 38APS050 48 (21.5) — 38APD050 22 (9.9) 26 (11.6) 38APD060 27 (12.1) 29 (12.9) 38APD070 29 (12.9) 33 (15.1) 38APD080 29 (12.9) 46 (20.7) 38APD090 39 (17.7) 46 (20.7) 38APD100 46 (20.7) 46 (20.7)

NOTES:

1. Preliminary charge is based on 25 ft (7.6 m) of interconnecting liquid line piping between indoor and outdoor units.

2. For liquid line piping longer than 25 ft (7.6 m), use the following information:

1

/2 in. (12.7 mm) liquid line — 0.6 lb per 10 linear ft (0.27 kg per 3 m)

5

/8 in. (15.9 mm) liquid line — 1.0 lb per 10 linear ft (0.45 kg per 3 m)

7

/8 in. (22.2 mm) liquid line — 2.0 lb per 10 linear ft (0.91 kg per 3 m)

1

/8 in. (28.6 mm) liquid line — 3.5 lb per 10 linear ft (1.59 kg per 3 m)

Adjust Refrigerant Charge

CAUTION

Never charge liquid into the low pressure side of system. Do not overcharge. During charging or removal of refrigeration, be sure indoor fan system is operating. Failure to comply could result in personal injury or equipment damage.

CAUTION

Charging procedures for MCHX (microchannel heat exchanger) units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in

1

/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts. Failure to comply may result in equipment damage.

Due to the compact design of microchannel heat exchangers, refrigerant charge is reduced significantly. As a result, charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in are on and all compressors are running when using charging charts. If charging at low outdoor ambient, the condenser coil can be partially blocked in order to increase head pressure.

being serviced operating at full capacity, adjust the refrigerant charge in accordance with the unit charging charts in Fig. 35-

56. Charge vapor into compressor low-side service port located on the suction service valve. Measure pressure at the liquid line service valve, making sure a Schrader depressor is used. Also, measure liquid line temperature as close to the liquid service valve as possible. Add charge until the pressure and temperature conditions of the charging chart curve are met. If liquid pressure and temperature point fall above curve, add charge. If liquid pressure and temperature point fall below curve, reduce the charge until the conditions match the curve.

See Fig. 57 and 58. Ensure all fans and compressors on the circuit being serviced are operating. Also ensure maximum allowable liquid lift has not been exceeded. If the sight glass is cloudy, a restriction could exist in the liquid line. Check for a plugged filter drier or partially open solenoid valve. Replace or repair, as needed.

1

/4 lb increments until complete. Ensure that all fans

With all fans operating and all compressors on the circuit

If the sight glass is cloudy, check refrigerant charge again.

34

Fig. 36 — Charging Chart — 38APS025, 50/60 Hz

Fig. 35 — Charging Chart — 38APD025, 50/60 Hz

70

80

90

100

110

120

130

Circuit A or B

50

40

30

20

UID TEMPERATURE AT LIQUID VALVE (DEG C)

UID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CUR VE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A or B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CUR VE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7169

100

110

120

130

Single Circuit

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Single Circuit

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7170

35

100

110

120

130

Circuit A or B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A or B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

Fig. 37 — Charging Chart — 38APD027, 50/60 Hz

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7171

100

110

120

130

Single Circuit

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Single Circuit

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

Fig. 38 — Charging Chart — 38APS027, 50/60 Hz

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7172

36

Fig. 39 — Charging Chart — 38APD030, 50/60 Hz

100

110

120

130

Circuit A or B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A or B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7173

Fig. 40 — Charging Chart — 38APS030, 50/60 Hz

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7174

Single Circuit

130

120

50

40

AT LIQUID VALVE (DEG C)

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

120

ADD CHARGE IF ABOVE CURVE

110

100

AT LIQUID VALVE (DEG F)

90

80

70

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

60

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

1500

2000 2500 3000 3500

LIQUID PRESSURE AT LIQUID VALVE (kPag)

37

REDUCE CHARGE IF BELOW CURVE

50 SST

40 SST

30 SST

4000

Fig. 41 — Charging Chart — 38APD040 — Circuit A, 50/60 Hz

100

110

120

130

Circuit A

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

40 SST

30 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

40 SST

30 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7175

100

110

120

130

Circuit B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

40 SST

30 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

40 SST

30 SST

Fig. 42 — Charging Chart — 38APD040 — Circuit B, 50/60 Hz

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7176

38

Fig. 43 — Charging Chart — 38APS040, 50/60 Hz

Fig. 44 — Charging Chart — 38APD050 — Circuit A, 50/60 Hz

90.0

100.0

110 .0

120.0

130.0

Single Circuit

50

40

30

ATURE AT LIQUID VALVE (DEG C)

ATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

40 SST

30 SST

60.0

70.0

80.0

90.0

100.0

110 .0

120.0

130.0

200.0 250.0 300.0 350.0 400.0 450.0 500.0 550.0 600.0

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Single Circuit

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

40 SST

30 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7177

100

110

120

130

Circuit A

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7178

39

Fig. 46 — Charging Chart — 38APS050, 50/60 Hz

100

110

120

130

Circuit B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

Fig. 45 — Charging Chart — 38APD050 — Circuit B, 50/60 Hz

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7179

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7180

Single Circuit

130

50

40

AT LIQUID VALVE (DEG C)

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

120

110

100

AT LIQUID VALVE (DEG F)

90

80

70

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

60

200 250 300 350 400 450 500 550 600

ADD CHARGE IF ABOVE CURVE

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Single Circuit

REDUCE CHARGE IF BELOW CURVE

50 SST

40 SST

30 SST

1500

2000 2500 3000 3500

LIQUID PRESSURE AT LIQUID VALVE (kPag)

40

4000

Fig. 48 — Charging Chart — 38APD060 — Circuit B, 50/60 Hz

Fig. 47 — Charging Chart — 38APD060 — Circuit A, 50/60 Hz

90.0

100.0

110 .0

120.0

130.0

Circuit A

50

40

30

ATURE AT LIQUID VALVE (DEG C)

ATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60.0

70.0

80.0

90.0

100.0

110 .0

120.0

130.0

200.0 250.0 300.0 350.0 400.0 450.0 500.0 550.0 600.0

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7181

90.0

100.0

110 .0

120.0

130.0

Circuit B

50

40

30

ATURE AT LIQUID VALVE (DEG C)

ATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60.0

70.0

80.0

90.0

100.0

110 .0

120.0

130.0

200.0 250.0 300.0 350.0 400.0 450.0 500.0 550.0 600.0

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7182

41

Fig. 50 — Charging Chart — 38APD070 — Circuit B, 50/60 Hz

100

110

120

130

Circuit A

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

Fig. 49 — Charging Chart — 38APD070 — Circuit A, 50/60 Hz

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7183

100

110

120

130

Circuit B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7184

42

Fig. 52 — Charging Chart — 38APD080 — Circuit B, 50/60 Hz

100

110

120

130

Circuit A

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

Fig. 51 — Charging Chart — 38APD080 — Circuit A, 50/60 Hz

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7185

100

110

120

130

Circuit B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7186

43

Fig. 54 — Charging Chart — 38APD090 — Circuit B, 50/60 Hz

Fig. 53 — Charging Chart — 38APD090 — Circuit A, 50/60 Hz

100

110

120

130

Circuit A

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7187

100

110

120

130

Circuit B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7188

44

Fig. 56 — Charging Chart — 38APD100 — Circuit B, 50/60 Hz

Fig. 55 — Charging Chart — 38APD100 — Circuit A, 50/60 Hz

100

110

120

130

Circuit A

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit A

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7189

100

110

120

130

Circuit B

50

40

AT LIQUID VALVE (DEG C)

AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

50 SST

30 SST

40 SST

60

70

80

90

100

110

120

130

200 250 300 350 400 450 500 550 600

LIQUID PRESSURE AT LIQUID VALVE (PSIG)

Circuit B

1500

2000 2500 3000 3500

4000

LIQUID PRESSURE AT LIQUID VALVE (kPag)

50

40

30

20

LIQUID TEMPERATURE AT LIQUID VALVE (DEG C)

LIQUID TEMPERATURE AT LIQUID VALVE (DEG F)

ADD CHARGE IF ABOVE CURVE

REDUCE CHARGE IF BELOW CURVE

50 SST

30 SST

40 SST

NOTE: Charging procedures for MCHX units require very accurate measurement techniques. Charge should be added in small increments. Using cooling charging charts provided, add or remove refrigerant until conditions of the chart are met. As conditions get close to the point on the chart, add or remove charge in 1/4 lb increments until complete. Ensure that all fans are on and all compressors are running when using charging charts.

LEGEND

SST — Saturated Suction Temperature

a38-7190

45

LEGEND

*Field-supplied. †Field-supplied when required. Must be controlled by 38AP unit control.

Fig. 57 — Required Location of Solenoid Valves and Recommended Filter Drier and

Sight Glass Locations for 38APD025-100 Dual-Circuit Units

LLS — Liquid Line Solenoid TXV — Thermostatic Expansion Valve

*Field-supplied. †Field-supplied when required. Must be controlled by 38AP unit control.

Fig. 58 — Required Location of Solenoid Valves and Recommended Filter Drier and

Sight Glass Locations for 38APS025-050 Single-Circuit Units

†

a38-7117

SECTION 1

SECTION 2

SOLENOID VALVE†

LIQUID LINE

a38-7118

46

Check Compressor Oil Level — After adjusting the





Fig. 60 — Typical Trio Compressor Assembly

LEGEND

DPT — Discharge Pressure Transducer DTT — Discharge Temperature Thermistor HPS — High Pressure Switch RGT — Return Gas Temperature Sensor SPT — Space Temperature Sensor

OIL SIGHT GLASS

HPS B

DPT B

SUCTION SCHRADER A

SUCTION SCHRADER B

RGT A

HPS A

DPT A

DTT A

SPT A

RGT B SPT B

Fig. 59 — Typical Tandem Compressor Assembly

LEGEND

DPT — Discharge Pressure Transducer DTT — Discharge Temperature Thermistor HPS — High Pressure Switch RGT — Return Gas Temperature Sensor SPT — Space Temperature Sensor

SUCTION SCHRADER A

OIL SIGHT GLASS

RGT A

HPS A

DPT A

DTT A

SPT A

OIL ADD LOCATION

refrigerant charge, allow each circuit to run fully loaded for 20 minutes. Stop the compressors and check the oil level. Oil level should be

1

/8 to 3/8 up on the sight glass.

IMPORTANT: Oil level should only be checked when the compressors are off.

Add oil only if necessary to bring the oil into view in the sight glass. If oil is added, run the circuit for an additional 10 minutes, then stop and check oil level. If the level remains low, check the piping system for proper design for oil return; also, check the system for leaks. If checking the oil level with unit running in part load, let unit run one hour, then run at full load for 10 minutes. If oil does not return to acceptable sight glass levels, check for correct suction piping and line sizing.

Final Checks — Ensure all safety controls are operating,

control panel covers are on, and the service panels are in place.

Oil Charge

CAUTION

The compressor in a Puron® refigerant (R-410A) system uses a polyol ester (POE) oil. This is extremely hygroscopic, meaning it absorbs water readily. POE oils can absorb 15 times as much water as other oils designed for HCFC and CFC refrigerants. Take all necessary precautions to avoid exposure of the oil to the atmosphere. Failure to do so could result in possible equipment damage.

Puron systems use a polyol ester (POE) oil. Use only Carrier approved compressor oil. Oil should be visible in compressor oil sight glass. An acceptable oil level is from sight glass. All compressors must be off when checking oil level. Recommended oil level adjustment method is as follows:

ADD OIL — Recover charge from the outdoor section of the unit and isolate the condensing unit using the liquid and suction service valves. Add oil to suction line Schrader valve on tandem compressors sets and the compressor Schrader on the trio and single compressor circuits. (See Fig. 59 and 60.) When oil can be seen at the bottom of the sight glass, add oil in 5 oz increments which is approximately

1

/8 in oil level. Run all compressors for 20 minutes then shut off to check oil level. Repeat procedure until acceptable oil level is present.

NOTE: Use only Carrier approved compressor oil. Approved sources are:

Totaline . . . . . . . . . . . . . . . . . . . . . . .3MAF POE P903-1601

Mobil . . . . . . . . . . . . . . . . . . . . . . . . . . . EAL Arctic 32-3MA

Uniqema . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RL32-3MAF

Do not reuse oil that has been drained out, or oil that has

been exposed to atmosphere.

Actual Start-Up

NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-5.

Actual start-up should be done only under supervision of a

qualified refrigeration mechanic. VAV APPLICATIONS — C.TYP = 1 and 9

1. Start indoor fan motor.

2. Fan status switch input should close. Note the unit will not start unless the Fan Status input is closed.

3. Unit C.TYP = 1: Using the scrolling marquee display, set leaving set point (Set Point COOL CSP.1). Unit C.TYP = 9: Using the 4 to 20mA input, set the control point (Run Status VIEW CTPT) for leaving set point.

1

/8 to 3/8 of

4. Turn ENABLE/OFF/REMOTE CONTACT switch to ENABLE position.

5. If supply air temperature is greater than the control point the unit will start to stage up.

CV APPLICATION — C.TYP = 4

1. Start indoor fan motor.

47

2. Fan status switch input should close. Note the unit will





–––

–

–––

–

not start unless the fan status input is closed.

3. Close Y1 input unit will stage up to 50 % capacity with 1 minute between stages.

4. Close Y2 input the unit will stage up to 100% capacity with 1 minute between stages.

CV APPLICATION — C.TYP = 3

1. Start indoor fan motor.

2. Fan status switch input should close. Note the unit will not start unless the fan status input is closed.

3. Close Y1 input unit. The control will control supply-air temperature to CSP1 and stage capacity as required.

4. Close Y2 input. The unit will control supply-air temperature to CSP2 and stage capacity as required.

CV APPLICATION — C.TYP = 5

1. Start indoor fan motor.

2. Fan status switch input should close. Note the unit will not start unless the fan status input is closed.

3. The control will use space temperature (Te mp e ra t ur e s

SPT) vs space temperature set point (Set Point

COOL SPS.P) to decide to whether to control supply-

air temperature to CSP1 or CSP2, and will stage capacity as required.

% CAPACITY INPUT — C.TYP = 7

1. Start indoor fan motor.

2. Fan status switch input should close. Note the unit will not start unless the fan status input is closed.

3. The control will adjust unit capacity based on the 4 to 20mA Cool mA (INPUTS 4-20 CL.MA).

4. Actual capacity and desired capacity may be different due to unit diagnostics.

OPERATION

Operating Limitations

AMBIENT LMITATIONS — See Table 16 for ambient limitations.

Table 16 — 38AP Unit Ambient Limitations

Single Circuit

38APS

UNIT

SIZE

025-050 45 F (7.2 C) 20 F ( 28.9 C) 122 F (50 C)

38APD

UNIT

025-040 32 F (0 C) 20 F ( 28.9 C) 122 F (50 C) 050-060 25 F ( 3.9 C) 20 F ( 28.9 C) 122 F (50 C) 070-100 32 F (0 C) 20 F( 28.9 C) 122 F (50 C)

* Factory-installed option or field-installed accessory. †Operation above listed temperature depends on the saturated suction tem-

perature the unit is operating at. Refer to ECAT for exact limitations.

VOLTAGE (ALL UNITS) Main Power Supply

supply voltages are listed in the Installation Instructions.

Unbalanced 3-Phase Supply Voltage — Never operate a motor where a phase imbalance between phases is greater than 2%.

To determine percent voltage imbalance:

% Voltage Imbalance = 100 x

SIZE

MINIMUM LOW

AMBIENT

(Standard Unit)

MINIMUM LOW

AMBIENT

(Standard Unit)

— Minimum and maximum acceptable

MINIMUM LOW AMBIENT

MOTORMASTER

CONTROL*

Dual Circuit

MINIMUM LOW AMBIENT

MOTORMASTER

CONTROL*

max voltage deviation

from avg voltage

average voltage

MAXIMUM

AMBIENT†

MAXIMUM

AMBIENT†

®

The maximum voltage deviation is the largest difference between a voltage measurement across 2 legs and the average across all 3 legs.

Example: Supply voltage is 240-3-60.

AB = 243 v

BC = 236 v AC = 238 v

1. Determine average voltage:

Average voltage =

243 + 236 + 238

3

717

=

3

= 239

2. Determine maximum deviation from average voltage: (AB) 243 – 239 = 4 v

(BC) 239 – 236 = 3 v (AC) 239 – 238 = 1 v

Maximum deviation is 4 v.

3. Determine percent voltage imbalance:

% Voltage Imbalance = 100 x

4

239

= 1.7%

This voltage imbalance is satisfactory as it is below the

maximum allowable of 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately. Do not operate unit until imbalance condition is corrected.

Control Circuit Power

— Power for the control circuit is supplied from the main incoming power through a factoryinstalled control power transformer (TRAN1) for all models. Field wiring connections are made to LVT terminal board.

Operation Sequence — During unit off cycle, if power

is maintained to the unit and the EMERGENCY ON/OFF switch is left in the OFF position, the compressor crankcase heaters will be energized.

The unit is started by putting the ENABLE/OFF/REMOTE CONTACT switch in the ENABLE or REMOTE CONTACT position. When the unit receives a call to run (either from the internal control, or CCN network command or remote contact closure), the unit stages up in capacity to maintain either supply air temperature or space temperature. The first compressor

1

starts 1

or selected based on compressor run hours and starts depending on field configuration. The unit control will override this selection under certain starting conditions to properly maintain oil return to the compressors. The MBB controls fan stages to maintain the head pressure set point and will automatically adjust unit capacity as required to keep compressors from operating outside of the specified envelope. There are no pumpout or pumpdown sequences on these units.

pressor is operating in the circuit and also when the circuit is OFF and the OAT is less than the SST. The liquid line solenoid valve is de-energized 5 seconds after the circuit stops and also when the circuit is OFF and the OAT is greater than the SST plus 2° F. Each circuit operates independently.

/2 to 3 minutes after the call for cooling.

The lead circuit can be specifically designated on all models

The liquid line solenoid valve is energized anytime a com-

48

For all units, if temperature reset is used, the unit controls to a higher leaving temperature as the building load reduces. If demand limit is used, the unit may temporarily be unable to maintain the desired leaving-air temperature because of imposed power limitations. Loading sequence for compressors is shown in Table 8.

SERVICE

WARNING

ELECTRIC SHOCK HAZARD: Turn off all power to unit before servicing. The ENABLE/OFF/REMOTE CONTACT switch on control panel does not shut off control power; use field disconnect. Failure to do so could result in personal injury.

Electronic Components

CONTROL COMPONENTS — Unit uses an advanced electronic control system that normally does not require service. For details on controls refer to Operating Data section.

Access to the compressors is through latched panels from beneath the control box on the unit sizes 025-060 and on each end of the unit on sizes 070-100. The front door(s) provide access to the compressor(s) and all components of the refrigeration system. For unit sizes 025-030, access to the controls is through the upper latched outer door above the compressor access door. Similarly, the upper center latched door on sizes 040-060 gives access to the controls. Inner panels are secured in place and should not be removed unless all power to the unit is off.

Thermistors — Electronic control uses up to 7 thermistors

to sense temperatures used to control operation of the unit. The standard unit comes with return gas temperature (RGT) and outside air temperature (OAT) thermistors. These thermistors are 5 k thermistors, identical in their temperature and voltage drop performance. Resistance at various temperatures is listed in Tables 17-21.

DISCHARGE TEMPERATURE THERMISTOR (DTT) — This sensor is only used on units with a digital compressor. The sensor is mounted on the discharge line close to the discharge of the digital compressor. It attaches to the discharge line using a spring clip and protects the system from high discharge gas temperature when the digital compressor is used. This sensor is a 86 k thermistor connected to the AUX board.

RETURN GAS THERMISTORS (RGTA,B) — The RGTA,B thermistors are located in the suction line of the respective circuits and are used to monitor superheat entering the compressor and generate low superheat alarms.

OUTSIDE AIR THERMISTOR (OAT) — The OAT is located inside the base rail on unit sizes 025-060 and on the back of the control box on sizes 070-100. It is used to control fan cycling on the unit.

The remaining thermistors are installed in either the space, ductwork or air handler. These include the space temperature

(SPT), supply air temperature (SAT) and return air temperature (RAT/EAT) thermistors.

SPACE TEMPERATURE THERMISTOR (SPT) — This sensor is a field-supplied accessory and is part of the T55 or T56 sensor package that can be used to control space temperature on constant volume (CV) units. The sensor is connected to the LVT. The SPT has a 10 k input channel and has a different set of temperature vs. resistance and voltage drop performance than the 5 k thermistors.

SUPPLY AIR THERMISTOR (SAT) — This sensor is field supplied and is used to measure the supply air temperature of the unit. The SAT thermistor is configurable to be either a 5 k or 10 k thermistor. Care should be taken to ensure the configuration matches the type of thermistor which is installed. This is configured under the Configuration menu OPT1, SAT.T and by selecting 0 for 5 k or 1 for 10 k or 2 for none. The proper temperature vs. resistance and voltage drop performance tables should be followed based on the configuration.

RETURN AIR OR EVAPORATOR AIR THERMISTOR (RAT) — This sensor is field supplied and should be located directly upstream of the evaporator. The RAT is used to measure the evaporator entering or return air temperature of the unit. The RAT thermistor is configurable to be either a 5 k or 10 k thermistor. Care should be taken to ensure the configuration matches the type of thermistor which is installed. This is configured under the Configuration menu OPT1, RAT.T and by selecting 0 for 5 k or 1 for 10 k or 2 for none. The proper temperature vs. resistance and voltage drop performance tables should be followed based on configuration.

See Table 3 for thermistor pin connection points.

THERMISTOR/TEMPERATURE SENSOR CHECK — A high quality digital volt-ohmmeter is required to perform this check.

1. Connect the digital voltmeter across the appropriate themistor terminals at the J8 terminal strip on the main base board (see Fig. 61).

2. Using the voltage reading obtained, read the sensor temperature from Tables 17-21.

3. To check thermistor accuracy, measure temperature at probe location with an accurate thermocouple-type temperature measuring instrument. Insulate thermocouple to avoid ambient temperatures from influencing reading. Temperature measured by thermocouple and temperature determined from thermistor voltage reading should be close, ± 5° F (3° C) if care was taken in applying thermocouple and taking readings.

If a more accurate check is required, unit must be shut down and thermistor removed and checked at a known temperature (freezing point or boiling point of water) using either voltage drop measured across thermistor at the J8 terminal, by determining the resistance with unit shut down and thermistor disconnected from J8. Compare the values determined with the value read by the control in the Temperatures mode using the scrolling marquee display.

REPLACING RETURN GAS THERMISTORS (RGTA,B) — Add a small amount of thermal conductive grease to the thermistor well and end of probe. Tighten the retaining nut

1

/4 turn past finger tight.

49

Table 17 — 5K Thermistor Temperatures (°F) vs. Resistance/Voltage Drop

TEMP

(F)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

–25 3.699 98,010 –24 3.689 94,707 –23 3.679 91,522 –22 3.668 88,449 –21 3.658 85,486 –20 3.647 82,627 –19 3.636 79,871 –18 3.624 77,212 –17 3.613 74,648 –16 3.601 72,175 –15 3.588 69,790 –14 3.576 67,490 –13 3.563 65,272 –12 3.550 63,133 –11 3.536 61,070 –10 3.523 59,081

–9 3.509 57,162 –8 3.494 55,311 –7 3.480 53,526 –6 3.465 51,804 –5 3.450 50,143 –4 3.434 48,541 –3 3.418 46,996 –2 3.402 45,505 –1 3.386 44,066

0 3.369 42,679 1 3.352 41,339 2 3.335 40,047 3 3.317 38,800 4 3.299 37,596 5 3.281 36,435 6 3.262 35,313 7 3.243 34,231 8 3.224 33,185

9 3.205 32,176 10 3.185 31,202 11 3.165 30,260 12 3.145 29,351 13 3.124 28,473 14 3.103 27,624 15 3.082 26,804 16 3.060 26,011 17 3.038 25,245 18 3.016 24,505 19 2.994 23,789 20 2.972 23,096 21 2.949 22,427 22 2.926 21,779 23 2.903 21,153 24 2.879 20,547 25 2.856 19,960 26 2.832 19,393 27 2.808 18,843 28 2.784 18,311 29 2.759 17,796 30 2.735 17,297 31 2.710 16,814 32 2.685 16,346 33 2.660 15,892 34 2.634 15,453 35 2.609 15,027 36 2.583 14,614 37 2.558 14,214 38 2.532 13,826 39 2.506 13,449 40 2.480 13,084 41 2.454 12,730 42 2.428 12,387 43 2.402 12,053 44 2.376 11,730 45 2.349 11,416 46 2.323 11,112 47 2.296 10,816 48 2.270 10,529 49 2.244 10,250 50 2.217 9,979 51 2.191 9,717 52 2.165 9,461 53 2.138 9,213 54 2.112 8,973 55 2.086 8,739 56 2.060 8,511 57 2.034 8,291 58 2.008 8,076

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

59 1.982 7,686 60 1.956 7,665 61 1.930 7,468 62 1.905 7,277 63 1.879 7,091 64 1.854 6,911 65 1.829 6,735 66 1.804 6,564 67 1.779 6,399 68 1.754 6,238 69 1.729 6,081 70 1.705 5,929 71 1.681 5,781 72 1.656 5,637 73 1.632 5,497 74 1.609 5,361 75 1.585 5,229 76 1.562 5,101 77 1.538 4,976 78 1.516 4,855 79 1.493 4,737 80 1.470 4,622 81 1.448 4,511 82 1.426 4,403 83 1.404 4,298 84 1.382 4,196 85 1.361 4,096 86 1.340 4,000 87 1.319 3,906 88 1.298 3,814 89 1.278 3,726 90 1.257 3,640 91 1.237 3,556 92 1.217 3,474 93 1.198 3,395 94 1.179 3,318 95 1.160 3,243 96 1.141 3,170 97 1.122 3,099 98 1.104 3,031

99 1.086 2,964 100 1.068 2,898 101 1.051 2,835 102 1.033 2,773 103 1.016 2,713 104 0.999 2,655 105 0.983 2,597 106 0.966 2,542 107 0.950 2,488 108 0.934 2,436 109 0.918 2,385 110 0.903 2,335 111 0.888 2,286 112 0.873 2,239 113 0.858 2,192 114 0.843 2,147 115 0.829 2,103 116 0.815 2,060 117 0.801 2,018 118 0.787 1,977 119 0.774 1,937 120 0.761 1,898 121 0.748 1,860 122 0.735 1,822 123 0.723 1,786 124 0.710 1,750 125 0.698 1,715 126 0.686 1,680 127 0.674 1,647 128 0.663 1,614 129 0.651 1,582 130 0.640 1,550 131 0.629 1,519 132 0.618 1,489 133 0.608 1,459 134 0.597 1,430 135 0.587 1,401 136 0.577 1,373 137 0.567 1,345 138 0.557 1,318 139 0.548 1,291 140 0.538 1,265 141 0.529 1,240 142 0.520 1,214

TEMP

(F)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

143 0.511 1,190 144 0.502 1,165 145 0.494 1,141 146 0.485 1,118 147 0.477 1,095 148 0.469 1,072 149 0.461 1,050 150 0.453 1,029 151 0.445 1,007 152 0.438 986 153 0.430 965 154 0.423 945 155 0.416 925 156 0.408 906 157 0.402 887 158 0.395 868 159 0.388 850 160 0.381 832 161 0.375 815 162 0.369 798 163 0.362 782 164 0.356 765 165 0.350 750 166 0.344 734 167 0.339 719 168 0.333 705 169 0.327 690 170 0.322 677 171 0.317 663 172 0.311 650 173 0.306 638 174 0.301 626 175 0.296 614 176 0.291 602 177 0.286 591 178 0.282 581 179 0.277 570 180 0.272 561 181 0.268 551 182 0.264 542 183 0.259 533 184 0.255 524 185 0.251 516 186 0.247 508 187 0.243 501 188 0.239 494 189 0.235 487 190 0.231 480 191 0.228 473 192 0.224 467 193 0.220 461 194 0.217 456 195 0.213 450 196 0.210 445 197 0.206 439 198 0.203 434 199 0.200 429 200 0.197 424 201 0.194 419 202 0.191 415 203 0.188 410 204 0.185 405 205 0.182 401 206 0.179 396 207 0.176 391 208 0.173 386 209 0.171 382 210 0.168 377 211 0.165 372 212 0.163 367 213 0.160 361 214 0.158 356 215 0.155 350 216 0.153 344 217 0.151 338 218 0.148 332 219 0.146 325 220 0.144 318 221 0.142 311 222 0.140 304 223 0.138 297 224 0.135 289 225 0.133 282

50

Table 18 — 5K Thermistor Temperatures (°C) vs. Resistance/Voltage Drop

TEMP

(C)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

–32 3.705 100,260 –31 3.687 94,165 –30 3.668 88,480 –29 3.649 83,170 –28 3.629 78,125 –27 3.608 73,580 –26 3.586 69,250 –25 3.563 65,205 –24 3.539 61,420 –23 3.514 57,875 –22 3.489 54,555 –21 3.462 51,450 –20 3.434 48,536 –19 3.406 45,807 –18 3.376 43,247 –17 3.345 40,845 –16 3.313 38,592 –15 3.281 38,476 –14 3.247 34,489 –13 3.212 32,621 –12 3.177 30,866 –11 3.140 29,216 –10 3.103 27,633

–9 3.065 26,202 –8 3.025 24,827 –7 2.985 23,532 –6 2.945 22,313 –5 2.903 21,163 –4 2.860 20,079 –3 2.817 19,058 –2 2.774 18,094 –1 2.730 17,184

0 2.685 16,325 1 2.639 15,515 2 2.593 14,749 3 2.547 14,026 4 2.500 13,342 5 2.454 12,696 6 2.407 12,085 7 2.360 11,506 8 2.312 10,959

9 2.265 10,441 10 2.217 9,949 11 2.170 9,485 12 2.123 9,044 13 2.076 8,627 14 2.029 8,231

TEMP

(C)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

15 1.982 7,855 16 1.935 7,499 17 1.889 7,161 18 1.844 6,840 19 1.799 6,536 20 1.754 6,246 21 1.710 5,971 22 1.666 5,710 23 1.623 5,461 24 1.580 5,225 25 1.538 5,000 26 1.497 4,786 27 1.457 4,583 28 1.417 4,389 29 1.378 4,204 30 1.340 4,028 31 1.302 3,861 32 1.265 3,701 33 1.229 3,549 34 1.194 3,404 35 1.160 3,266 36 1.126 3,134 37 1.093 3,008 38 1.061 2,888 39 1.030 2,773 40 0.999 2,663 41 0.969 2,559 42 0.940 2,459 43 0.912 2,363 44 0.885 2,272 45 0.858 2,184 46 0.832 2,101 47 0.807 2,021 48 0.782 1,944 49 0.758 1,871 50 0.735 1,801 51 0.713 1,734 52 0.691 1,670 53 0.669 1,609 54 0.649 1,550 55 0.629 1,493 56 0.610 1,439 57 0.591 1,387 58 0.573 1,337 59 0.555 1,290 60 0.538 1,244 61 0.522 1,200

TEMP

(C)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

62 0.506 1,158 63 0.490 1,118 64 0.475 1,079 65 0.461 1,041 66 0.447 1,006 67 0.433 971 68 0.420 938 69 0.407 906 70 0.395 876 71 0.383 836 72 0.371 805 73 0.360 775 74 0.349 747 75 0.339 719 76 0.329 693 77 0.319 669 78 0.309 645 79 0.300 623 80 0.291 602 81 0.283 583 82 0.274 564 83 0.266 547 84 0.258 531 85 0.251 516 86 0.244 502 87 0.237 489 88 0.230 477 89 0.223 466 90 0.217 456 91 0.211 446 92 0.204 436 93 0.199 427 94 0.193 419 95 0.188 410 96 0.182 402 97 0.177 393 98 0.172 385

99 0.168 376 100 0.163 367 101 0.158 357 102 0.154 346 103 0.150 335 104 0.146 324 105 0.142 312 106 0.138 299 107 0.134 285

51

Table 19 — 10K Thermistor Temperature (°F) vs. Resistance/Voltage Drop

TEMP

(F)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

–25 4.758 196,453 –24 4.750 189,692 –23 4.741 183,300 –22 4.733 177,000 –21 4.724 171,079 –20 4.715 165,238 –19 4.705 159,717 –18 4.696 154,344 –17 4.686 149,194 –16 4.676 144,250 –15 4.665 139,443 –14 4.655 134,891 –13 4.644 130,402 –12 4.633 126,183 –11 4.621 122,018 –10 4.609 118,076

–9 4.597 114,236 –8 4.585 110,549 –7 4.572 107,006 –6 4.560 103,558 –5 4.546 100,287 –4 4.533 97,060 –3 4.519 94,020 –2 4.505 91,019 –1 4.490 88,171

0 4.476 85,396 1 4.461 82,729 2 4.445 80,162 3 4.429 77,662 4 4.413 75,286 5 4.397 72,940 6 4.380 70,727 7 4.363 68,542 8 4.346 66,465

9 4.328 64,439 10 4.310 62,491 11 4.292 60,612 12 4.273 58,781 13 4.254 57,039 14 4.235 55,319 15 4.215 53,693 16 4.195 52,086 17 4.174 50,557 18 4.153 49,065 19 4.132 47,627 20 4.111 46,240 21 4.089 44,888 22 4.067 43,598 23 4.044 42,324 24 4.021 41,118 25 3.998 39,926 26 3.975 38,790 27 3.951 37,681 28 3.927 36,610 29 3.903 35,577 30 3.878 34,569 31 3.853 33,606 32 3.828 32,654 33 3.802 31,752 34 3.776 30,860 35 3.750 30,009 36 3.723 29,177 37 3.697 28,373 38 3.670 27,597 39 3.654 26,838 40 3.615 26,113 41 3.587 25,396 42 3.559 24,715 43 3.531 24,042 44 3.503 23,399 45 3.474 22,770 46 3.445 22,161 47 3.416 21,573 48 3.387 20,998 49 3.357 20,447 50 3.328 19,903 51 3.298 19,386 52 3.268 18,874 53 3.238 18,384 54 3.208 17,904 55 3.178 17,441 56 3.147 16,991 57 3.117 16,552 58 3.086 16,131 59 3.056 15,714 60 3.025 15,317

TEMP

(F)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

61 2.994 14,925 62 2.963 14,549 63 2.932 14,180 64 2.901 13,824 65 2.870 13,478 66 2.839 13,139 67 2.808 12,814 68 2.777 12,493 69 2.746 12,187 70 2.715 11,884 71 2.684 11,593 72 2.653 11,308 73 2.622 11,031 74 2.592 10,764 75 2.561 10,501 76 2.530 10,249 77 2.500 10,000 78 2.470 9,762 79 2.439 9,526 80 2.409 9,300 81 2.379 9,078 82 2.349 8,862 83 2.319 8,653 84 2.290 8,448 85 2.260 8,251 86 2.231 8,056 87 2.202 7,869 88 2.173 7,685 89 2.144 7,507 90 2.115 7,333 91 2.087 7,165 92 2.059 6,999 93 2.030 6,838 94 2.003 6,683 95 1.975 6,530 96 1.948 6,383 97 1.921 6,238 98 1.894 6,098

99 1.867 5,961 100 1.841 5,827 101 1.815 5,698 102 1.789 5,571 103 1.763 5,449 104 1.738 5,327 105 1.713 5,210 106 1.688 5,095 107 1.663 4,984 108 1.639 4,876 109 1.615 4,769 110 1.591 4,666 111 1.567 4,564 112 1.544 4,467 113 1.521 4,370 114 1.498 4,277 115 1.475 4,185 116 1.453 4,096 117 1.431 4,008 118 1.409 3,923 119 1.387 3,840 120 1.366 3,759 121 1.345 3,681 122 1.324 3,603 123 1.304 3,529 124 1.284 3,455 125 1.264 3,383 126 1.244 3,313 127 1.225 3,244 128 1.206 3,178 129 1.187 3,112 130 1.168 3,049 131 1.150 2,986 132 1.132 2,926 133 1.114 2,866 134 1.096 2,809 135 1.079 2,752 136 1.062 2,697 137 1.045 2,643 138 1.028 2,590 139 1.012 2,539 140 0.996 2,488 141 0.980 2,439 142 0.965 2,391 143 0.949 2,343 144 0.934 2,297 145 0.919 2,253 146 0.905 2,209

TEMP

(F)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

147 0.890 2,166 148 0.876 2,124 149 0.862 2,083 150 0.848 2,043 151 0.835 2,003 152 0.821 1,966 153 0.808 1,928 154 0.795 1,891 155 0.782 1,855 156 0.770 1,820 157 0.758 1,786 158 0.745 1,752 159 0.733 1,719 160 0.722 1,687 161 0.710 1,656 162 0.699 1,625 163 0.687 1,594 164 0.676 1,565 165 0.666 1,536 166 0.655 1,508 167 0.645 1,480 168 0.634 1,453 169 0.624 1,426 170 0.614 1,400 171 0.604 1,375 172 0.595 1,350 173 0.585 1,326 174 0.576 1,302 175 0.567 1,278 176 0.558 1,255 177 0.549 1,233 178 0.540 1,211 179 0.532 1,190 180 0.523 1,169 181 0.515 1,148 182 0.507 1,128 183 0.499 1,108 184 0.491 1,089 185 0.483 1,070 186 0.476 1,052 187 0.468 1,033 188 0.461 1,016 189 0.454 998 190 0.447 981 191 0.440 964 192 0.433 947 193 0.426 931 194 0.419 915 195 0.413 900 196 0.407 885 197 0.400 870 198 0.394 855 199 0.388 841 200 0.382 827 201 0.376 814 202 0.370 800 203 0.365 787 204 0.359 774 205 0.354 762 206 0.349 749 207 0.343 737 208 0.338 725 209 0.333 714 210 0.328 702 211 0.323 691 212 0.318 680 213 0.314 670 214 0.309 659 215 0.305 649 216 0.300 639 217 0.296 629 218 0.292 620 219 0.288 610 220 0.284 601 221 0.279 592 222 0.275 583 223 0.272 574 224 0.268 566 225 0.264 557

52

Table 20 — 10K Thermistor Temperature (°C) vs. Resistance/Voltage Drop

TEMP

(C)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

–32 4.762 200,510 –31 4.748 188,340 –30 4.733 177,000 –29 4.716 166,342 –28 4.700 156,404 –27 4.682 147,134 –26 4.663 138,482 –25 4.644 130,402 –24 4.624 122,807 –23 4.602 115,710 –22 4.580 109,075 –21 4.557 102,868 –20 4.533 97,060 –19 4.508 91,588 –18 4.482 86,463 –17 4.455 81,662 –16 4.426 77,162 –15 4.397 72,940 –14 4.367 68,957 –13 4.335 65,219 –12 4.303 61,711 –11 4.269 58,415 –10 4.235 55,319

–9 4.199 52,392 –8 4.162 49,640 –7 4.124 47,052 –6 4.085 44,617 –5 4.044 42,324 –4 4.003 40,153 –3 3.961 38,109 –2 3.917 36,182 –1 3.873 34,367

0 3.828 32,654 1 3.781 31,030 2 3.734 29,498 3 3.686 28,052 4 3.637 26,686 5 3.587 25,396 6 3.537 24,171 7 3.485 23,013 8 3.433 21,918

9 3.381 20,883 10 3.328 19,903 11 3.274 18,972 12 3.220 18,090 13 3.165 17,255 14 3.111 16,464

TEMP

(C)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

15 3.056 15,714 16 3.000 15,000 17 2.944 14,323 18 2.889 13,681 19 2.833 13,071 20 2.777 12,493 21 2.721 11,942 22 2.666 11,418 23 2.610 10,921 24 2.555 10,449 25 2.500 10,000 26 2.445 9,571 27 2.391 9,164 28 2.337 8,776 29 2.284 8,407 30 2.231 8,056 31 2.178 7,720 32 2.127 7,401 33 2.075 7,096 34 2.025 6,806 35 1.975 6,530 36 1.926 6,266 37 1.878 6,014 38 1.830 5,774 39 1.784 5,546 40 1.738 5,327 41 1.692 5,117 42 1.648 4,918 43 1.605 4,727 44 1.562 4,544 45 1.521 4,370 46 1.480 4,203 47 1.439 4,042 48 1.400 3,889 49 1.362 3,743 50 1.324 3,603 51 1.288 3,469 52 1.252 3,340 53 1.217 3,217 54 1.183 3,099 55 1.150 2,986 56 1.117 2,878 57 1.086 2,774 58 1.055 2,675 59 1.025 2,579 60 0.996 2,488 61 0.968 2,400

TEMP

(C)

VO LTAGE

DROP

(V)

RESISTANCE

(Ohms)

62 0.940 2,315 63 0.913 2,235 64 0.887 2,157 65 0.862 2,083 66 0.837 2,011 67 0.813 1,943 68 0.790 1,876 69 0.767 1,813 70 0.745 1,752 71 0.724 1,693 72 0.703 1,637 73 0.683 1,582 74 0.663 1,530 75 0.645 1,480 76 0.626 1,431 77 0.608 1,385 78 0.591 1,340 79 0.574 1,297 80 0.558 1,255 81 0.542 1,215 82 0.527 1,177 83 0.512 1,140 84 0.497 1,104 85 0.483 1,070 86 0.470 1,037 87 0.457 1,005 88 0.444 974 89 0.431 944 90 0.419 915 91 0.408 889 92 0.396 861 93 0.386 836 94 0.375 811 95 0.365 787 96 0.355 764 97 0.345 742 98 0.336 721

99 0.327 700 100 0.318 680 101 0.310 661 102 0.302 643 103 0.294 626 104 0.287 609 105 0.279 592 106 0.272 576 107 0.265 561

TEMP

(C)

-40 -40 2,889,600

-35 -31 2,087,220

-30 -22 1,522,200

-25 -13 1,121,440

-20 -4 834,720

-15 5 627,280

-10 14 475,740

-5 23 363,990 0 32 280,820 5 41 218,410

10 50 171,170 15 59 135,140 20 68 107,440 25 77 86,000 30 86 69,280 35 95 56,160 40 104 45,810 45 113 37,580 50 122 30,990 55 131 25,680 60 140 21,400 70 158 15,070

TEMP

(F)

Table 21 — 86K Thermistor vs Resistance (DTT)

RESISTANCE

(Ohms)

53

TEMP

(C)

75 167 12,730 80 176 10,790 85 185 9,200 90 194 7,870 95 203 6,770 100 212 5,850 105 221 5,090 110 230 4,450 115 239 3,870 120 248 3,350 125 257 2,920 130 266 2,580 135 275 2,280 140 284 2,020 145 293 1,800 150 302 1,590 155 311 1,390 160 320 1,250 165 329 1,120 170 338 1,010 175 347 920 180 356 830

TEMP

(F)

RESISTANCE

(Ohms)

Pressure Transducers — The suction and discharge

Fig. 61 — Thermistor Connections to

Main Base Board, J8 Connector

26

25

24

23

22

17

16

15

14

13

12

11

10

9

8

7

6

3

1

3

1

3

1

6

2

4

2

4

2

12

11

21

20

19

18

10

9

8

7

6

5

4

5

4

3

2

1

4

2

1

3

5

J8

BLK

RED

LVT

4

3

22

23

T-55 ACCSY

SEN

OAT

BLU

BLK

RED

RGTB

BLK

RED

RGTA

SPTB

-

+

DPTB

-

+

A

C

B

A

C

B

GRN

RED

BLK

GRN

RED

BLK

SPTA

-

+

DPTA

-

+

A

C

B

A

C

B

GRN

RED

BLK

GRN

RED

BLK

RED

EVAPORATOR ENTERING FLUID TEMP

BLK

RED

EVAPORATOR LEAVING FLUID TEMP

SPACE TEMPERATURE ACCESSORY OR DUAL CHILLER LWT

J12 T55

LEGEND

ACCSY — Accessory DPT — Discharge Pressure Transducer LV T — Low Voltage Terminal LWT — Leaving Fluid Temperature OAT — Outdoor Air Temperature Sensor RGT — Return Gas Temperature Sensor SEN — Sensor Terminal Block SPT — Space Temperature Sensor

transducer.eps

in job folder (WIP)

Fig. 62 — Mounted Fan Position

fan height.eps in job folder (WIP)

transducers are different part numbers and can be distinguished by the color of the transducer body, suction (yellow) and discharge (red). Figures 59 and 60 shows typical location of pressure transducers on each circuit. No pressure transducer calibration is required. The transducers operate on a 5 vdc supply, which is generated by the main base board (MBB). See Fig. 61 for transducer connections to the J8 connector on the MBB.

IMPORTANT: Check for proper fan rotation (clockwise when viewed from above). If necessary, switch any 2 power leads to reverse fan rotation.

LOW SOUND FAN — A shroud and a wire guard provide protection from the rotating fan. The exposed end of the fan motor shaft is protected from weather by grease. If fan motor must be removed for service or replacement, be sure to regrease fan shaft and reinstall fan guard. The fan motor has a step in the motor shaft. For proper performance, fan should be positioned such that it is securely seated on this step. Tighten the bolt to 15 ± 1 ft-lb (20 ± 1.3 N·m).

IMPORTANT: Check for proper fan rotation (counterclockwise when viewed from above). If necessary, switch any 2 power leads to reverse fan rotation.

TROUBLESHOOTING — If a transducer is suspected of being faulty, first check supply voltage to the transducer. Supply voltage should be 5 vdc ± 0.2 v. If supply voltage is correct, compare pressure reading displayed on the scrolling marquee display module against pressure shown on a calibrated pressure gauge. Pressure readings should be within ± 15 psig. If the two readings are not reasonably close, replace the pressure transducer.

Condenser Fans — Each fan is supported by a formed

wire mount bolted to a fan deck and covered with a wire guard. METAL FANS — The exposed end of fan motor shaft is pro-

tected from weather by grease and a rubber boot. If fan motor must be removed for service or replacement, be sure to regrease fan shaft and reinstall fan guard. For proper performance, fan web should be 0.32 in. (8 mm) below top of orifice on the fan deck to top of the fan hub. (See Fig. 62.) Tighten set screws to 15 ± 1 ft-lb (20 ± 1.3 N-m). Figure 62 shows the proper position of mounted fan.

Motormaster® V Controller — The optional or acces-

sory Motormaster V controller uses an input signal from the AUX board. See Fig. 63. The controller is factory configured and requires no field programming. If a situation arises where the drive does not function properly, the information provided below and in Table 22 can be used to troubleshoot the drive.

WARNING

Hazard of electrical shock! Wait three minutes after disconnecting incoming power before servicing drive. Capacitors retain charge after power is removed. Drive assembly includes externally mounted current limiting resistors. Use extreme caution when servicing the drive. Failure to comply could result in possible personal injury.

WARNING

When configured as shown below, this equipment is designed to start when it receives line power. Ensure that all personnel are clear of fans and guards are installed before applying power. Failure to comply could result in possible personal injury.

CAUTION

If input power has not been applied to the drive for a period of time exceeding three years (due to storage, etc.), the electrolytic DC bus capacitors within the drive can change internally, resulting in excessive leakage current. This can result in premature failure of the capacitors if the drive is operated after such a long period of inactivity or storage. In order to reform the capacitors and prepare the drive for operation after a long period of inactivity, apply input power to the drive for 8 hours prior to actually operating the motor. Before attempting to operate the drive, motor, and driven equipment, be sure all procedures pertaining to installation and wiring have been properly followed. Failure to comply could result in equipment damage.

54

CAUTION



DO NOT connect incoming AC power to output terminals T1, T2, and T3! Severe damage to the drive will result. Do not continuously cycle input power to the drive more than once every two minutes. Damage to the drive will result.

GENERAL OPERATION — The speed varies in proportion to a 4 to 20 mA signal produced by the ComfortLink™ controls. The MMV output speed is displayed in Hz.

The ComfortLink controls must be configured for MMV operation in order for it to operate. This is configured under the Configuration menu M.MAST MMR.S and selecting “YES”. This configuration menu also contains the gains and minimum speed for the motormaster control logic.

CONFIGURATION — The MMV is configured for 1 of 12 operation modes based on the inputs to the control terminal block. The 38AP units use operating modes 5-8. In these configurations, the MMV follows a 4 to 20 mA speed reference signal present on terminals 25 (+) and 2 (-). One additional jumper is required to configure the drive for 50/60 Hz operation and input voltage. See Table 23 for proper inputs. Once the drive is powered, it will change to the mode selected according to the inputs. See Fig. 64.

DRIVE PROGRAMMING

CAUTION

It is strongly recommended that the user NOT change any programming without consulting Carrier service personnel. Unit damage may occur from improper programming.

To enter password and change program values:

1. Press Mode.

2. Upper right decimal point blinks.

3. Display reads “00”. To enter the PROGRAM mode to access the parameters, press the Mode button. This will ac- tivate the PASSWORD prompt (if the password has not been disabled). The display will read “00” and the upper right-hand decimal point will be blinking. (See Fig. 63.)

4. Use the and buttons to scroll to the password value (the factory default password is “111”) and press the Mode button. Once the correct password value is entered, the display will read “P01”, which indicates that the PROGRAM mode has been accessed at the beginning of the parameter menu (P01 is the first parameter).

NOTE: If the display flashes “Er”, the password was incorrect, and the process to enter the password must be repeated.

5. Press Mode to display present parameter number. Upper right decimal point blinks.

Use the and buttons to scroll to the desired parameter number.

Once the desired parameter number is found, press the Mode button to display the present parameter setting. The upper right-hand decimal point will begin blinking, indicating that the present parameter setting is being displayed, and that it can be changed by using the up and down buttons. Use and to change setting. Press Mode to store new setting.

Pressing the Mode will store the new setting and also exit the PROGRAM mode. To change another parameter, press the Mode key again to re-enter the PROGRAM mode (the parameter menu will be accessed at the parameter that was last viewed or changed before exiting). If the Mode key is pressed within two minutes of exiting the PROGRAM mode, the password is not required to access the parameters. After two minutes, the password must be entered in order to access the parameters again.

To change password: first enter the current password then change parameter P44 to the desired password.

To disable automatic control mode and enter manual speed control mode:

1. Change P05 to ‘01- keypad’.

2. Push UP and DOWN arrow key to set manual speed.

3. Set P05 to ‘04 - 4-20mA control’ to restore 4 to 20 mA control.

EPM CHIP — The drive uses a electronic programming module (EPM) chip to store the program parameters. This is an EEPROM memory chip and is accessible from the front of the VFD. It should not be removed with power applied to the VFD.

LOSS OF CCN COMMUNICATIONS — Carrier Comfort Network systems can be affected by high frequency electrical noise generated by the Motormaster V control. Ensure unit is well grounded to eliminate ground currents along communication lines.

trol is in operation, order a signal isolator (CEAS420876-2) and power supplies (CEAS221045-01, 2 required) for the CCN communication line.

Fault Codes start after a fault and will attempt to restart three times after a fault (the drive will not restart after CF, cF, GF, F1, F2-F9, or Fo faults). If all three restart attempts are unsuccessful, the drive will trip into FAULT LOCKOUT (LC), which requires a manual reset.

®

(CCN) communications with external control

If communications are lost only while Motormaster V con-

— The drive is programmed to automatically re-

55

Table 22 — Fault Codes

L1

L2

L3

Mode

DANGER

T1

T2

T3

B+

B-

DISPLAY

BUTTONS

Mode

MMV TERMINAL BLOCK

Fig. 63 — Motormaster® V Mode Buttons and Mode Display

LEGEND

MMV — Motormaster V Control

FAULT CODE DESCRIPTION SOLUTION

AF High Temperature Fault: Ambient temperature is too high; Cooling

CF Control Fault: A blank EPM, or an EPM with corrupted data has

cF Incompatibility Fault: An EPM with an incompatible parameter ver-

CL CURRENT LIMIT: The output current has exceeded the CURRENT

fan has failed (if equipped).

been installed.

sion has been installed.

LIMIT setting (Parameter 25) and the drive is reducing the output frequency to reduce the output current. If the drive remains in CURRENT LIMIT too long, it can trip into a CURRENT OVERLOAD fault (PF).

GF Data Fault: User data and OEM defaults in the EPM are corrupted. Restore factory defaults P48, see section above. If

HF High DC Bus Voltage Fault: Line voltage is too high; Deceleration

JF Serial Fault: The watchdog timer has timed out, indicating that the

rate is too fast; Overhauling load.

serial link has been lost.

LF Low DC Bus Voltage Fault: Line voltage is too low. Check line voltage — set P01 appropriately OF Output Transistor Fault: Phase to phase or phase to ground short

PF Current Overload Fault: VFD is undersized for the application;

SF Single-phase Fault: Single-phase input power has been applied to a

circuit on the output; Failed output transistor; Boost settings are too high; Acceleration rate is too fast.

Mechanical problem with the driven equipment.

three-phase drive. F1 EPM Fault: The EPM is missing or damaged. F2-F9, Fo Internal Faults: The control board has sensed a problem Consult factory Drive display = 60.0 even though it is

cold outside and it should be running slower

Drive display = ‘---’ even though drive should be running

Drive display = 8.0 even though fan should be running faster

VFD flashes 57 and LCS Feedback or speed signal lost. Drive will operate at 57 Hz until reset

Feedback signal is above set point Check for proper set point

Start jumper is missing Replace start jumper. See section above

Feedback signal is below set point and fan is at minimum speed Check for proper set point

or loss of start command. Resetting requires cycling start command

(or power).

Check cooling fan operation

Perform a factory reset using Parameter 48 — PROGRAM SELECTION.

Either remove the EPM or perform a factory reset (Parameter 48) to change the parameter version of the EPM to match the parameter version of the drive.

Check for loose electrical connections. Check for faulty condenser fan motor. Check Parameter P25 from Table 23 is set correctly.

that does not work, replace EPM. Check line voltage — set P01 appropriately

Check serial connection (computer) Check settings for PXX. Check settings in communication software to match PXX.

Reduce boost or increase acceleration values. If unsuccessful, replace drive. Check for incorrect wiring T1, T2, T3.

Check line voltage — set P01 appropriately Check for dirty coils Check for motor bearing failure

Check input power phasing

Check liquid line pressure

Check liquid line pressure In stand alone mode: Check transducer wiring and

feedback voltage. Feedback voltage displayed on P-69. Pin 6 should be 5 v output. Pin 5 (feedback) should be somewhere between 0 and 5 v.

56

208/230, 460, 575 VOLT ONLY

MOTORMASTER V TERMINAL BLOCK

21

FR1

1

2 5 6 11 12 2 14 13A13B13C15252

208 VOLT ONLY

RED

BLK

400 VOLT ONLY

14

21

FR1

14

21

FR1

14

Fig. 64 — Typical Motormaster® Wiring

Configuration Table

*208-v can run in mode 5 or 6.

MODE NOMINAL VOLTAGE Hz

CONTROL INPUT

(PINS 25, 2)

START JUMPER

5 208/230/460/575* 60 External control 4-20 mA TB1-TB2 6 208/380 60 External control 4-20 mA TB13A-TB2 7 230 50 External control 4-20 mA TB13B-TB2 8 380/415 50 External control 4-20 mA TB13C-TB2

LEGEND

AUX — Auxiliary FB — Fuse Block FR — Fan Relay MM — Motormaster OFM — Outdoor Fan Motor TB — Terminal Block

57

Table 23 — Motormaster

PARAMETER DESCRIPTION MODE 5 MODE 6 MODE 7 MODE 8

P01 Line Voltage: 01 = low line, 02 = high line 01 02 01 02 P02 Carrier Freq: 01 = 4 kHz, 02 = 6 kHz, 03=8 kHz 01 01 01 01 P03 Start-up mode: flying restart 06 06 06 06 P04 Stop mode: coast to stop 01 01 01 01 P05 Standard Speed source: 04=4-20 mA, 05=R22, 06=R134a 04 04 04 04 P06 TB-14 output: 01 = none 01 01 01 01 P08 TB-30 output: 01 = none 01 01 01 01 P09 TB-31 Output: 01 = none 01 01 01 01 P10 TB-13A function sel: 01 = none 01 01 01 01 P11 TB-13B function sel: 01 = none 01 01 01 01 P12 TB-13C function sel: 01 = none 01 01 01 01 P13 TB-15 output: 01 = none 01 01 01 01 P14 Control: 01 = Terminal strip 01 01 01 01 P15 Serial link: 02 = enabled 9600,8,N,2 with timer 02 02 02 02 P16 Units editing: 02 = whole units 02 02 02 02 P17 Rotation: 01 = forward only, 03 = reverse only 01 01 01 01 P19 Acceleration time: 10 sec 10 10 10 10 P20 Deceleration time: 10 sec 10 10 10 10 P21 DC brake time: 0 0000 P22 DC BRAKE VOLTAGE 0% 0000 P23 Min freq = 8 Hz ~ 100 - 160 rpm 8888 P24 Max freq 60 60 50 50 P25 Current limit: 125 125 110 110 P26 Motor overload: 100 100 100 100 100 P27 Base freq: 60 or 50 Hz 60 60 50 50 P28 Fixed boost: 0.5% at low frequencies 0.5 0.5 0.5 0.5 P29 Accel boost: 0% 0000 P30 Slip compensation: 0% 0000 P31 Preset spd #1: 0 57 57 47 47 P32 Preset spd #2: 0 0000 P33 Preset spd #3: 0 0000 P34 Preset spd 4 default – R22 setpoint. TB12-2 open 18.0 18.0 18.0 18.0 P35 Preset spd 5 default – R134a setpoint. TB12-2 closed 12.6 12.6 12.6 12.6 P36 Preset spd 6 default 0000 P37 Preset spd 7 default 0000 P38 Skip bandwidth 0000 P39 Speed scaling 0000 P40 Frequency scaling 50 or 60 Hz 60 60 50 50 P41 Load scaling: default (not used so NA) 200 200 200 200 P42 Accel/decel #2: default (not used so NA) 60 60 60 60 P43 Serial address 1111 P44 Password:111 111 111 111 111 P45 Speed at min signal: 8 Hz used when PID disabled and 4-20 mA input 8888 P46 Speed at max feedback: 60 or 50 Hz. Used when PID disabled and 4-20 mA input 60 60 50 50 P47 Clear history? 01 = maintain. (set to 00 to clear) 01 01 01 01 P48 Program selection: Mode 1 – 12 05 06 07 08 P61 PI Mode: 05= reverse, 0-5V, 01 = no PID 01 01 01 01 P62 Min feedback = 0 (0V *10) 0000 P63 Max feedback = 50 (5V * 10) 50 50 50 50 P64 Proportional gain = 4% 4444 P65 Integral gain = .2 .2 .2 .2 .2 P66 PI accel/decel (setpoint change filter) = 5 5555 P67 Min alarm 0000 P68 Max alarm 0000

LEGEND

NA — Not Applicable PID — Proportional Integral Derivative TB — Terminal Block

®

V Program Parameters for Operating Modes

58

TROUBLESHOOTING — Troubleshooting the Motormas-

®

ter

V control requires a combination of observing system operation and VFD display information. The MMV should follow the 4 to 20 mA signal from the ComfortLink™ controls.

The speed command from the ComfortLink controls can be

monitored in 2 ways:

1. Variables VH.PA, VH.PB in the "outputs" submenu of ComfortLink - given as a percentage of 4 to 20 mA range.

2. P56 in Motormaster V shows 4-20 mA input in percent of maximum input.

Refer to Table 24 for the variable definitions of each

controller.

Table 24 — Controller Cross-Reference

CONTROL

SIGNAL

4 mA 0% 20% 8 Hz 12 mA 50% 60% 26 Hz 20 mA 100% 100% 60 Hz

VH.PA, VH.PB

(COMFORTLINK)

4-20 mA

INPUT (P56,

MOTORMASTER V)

VFD SPEED

(MOTORMASTER V)

The MMV also provides real time monitoring of key in-

puts and outputs. The collective group is displayed through parameters 50-56 and all values are read only.

• P50: FAULT HISTORY — Last 8 faults

• P51: SOFTWARE version

• P52: DC BUS VOLTAGE — in percent of nominal. Usually rated input voltage x 1.4.

• P54: LOAD — in percent of drives rated output current rating

• P55: VDC INPUT — in percent of maximum input: 50 will indicate full scale which is 5 v

• P56: 4-20 mA INPUT — in percent of maximum input: 20% = 4 mA, 100% = 20 mA

REPLACING DEFECTIVE MODULES — The Comfort-

™

Link

replacement modules are shown in Table 25. If the main base board (MBB) has been replaced, verify that all configuration data is correct. Follow the Configuration mode table and verify that all items under sub-modes UNIT, OPT1 and OPT2 are correct. Any additional field-installed accessories or options (RSET, SLCT sub-modes) should also be verified as well as any specific time and maintenance schedules.

Refer to the Start-Up Checklist for 38AP units (completed at time of original start-up) found in the job folder. This information is needed later in this procedure. If the checklist does not exist, fill out the current information in the Configuration mode on a new checklist. Tailor the various options and configurations as needed for this particular installation.

CAUTION

5. Mount the new module in the unit’s control box using a Phillips screwdriver and the screws saved in Step 2.

6. Reinstall all module connectors. For accessory Navigator™ device replacement, make sure the plug is installed at LVT in the LEN connector.

7. Carefully check all wiring connections before restoring power.

8. Verify the ENABLE/OFF/REMOTE CONTACT switch is in the OFF position.

9. Restore control power. Verify that all module red LEDs blink in unison. Verify that all green LEDs are blinking and that the scrolling marquee or Navigator display is communicating correctly.

10. Verify all configuration information, settings, set points and schedules. Return the ENABLE/OFF/REMOTE CONTACT switch to its previous position.

Table 25 — Replacement Modules

MODULE

Main Base Board (MBB) 38AP501672

Scrolling Marquee Display HK50AA031

Energy Management

Module (EMM)

Navigator Display HK50AA033

Compressor Expansion Board HK50AA027

Auxiliary Board 32GB500442EE

REPLACEMENT PART NO.

(with Software)

30GT515218

Compressors

WARNING

Do not supply power to unit with compressor cover removed. Failure to follow this warning can cause a fire, resulting in personal injury or death.

WARNING

Exercise extreme caution when reading compressor currents when high-voltage power is on. Correct any of the problems described below before installing and running a replacement compressor. Wear safety glasses and gloves when handling refrigerants. Failure to follow this warning can cause fire, resulting in personl injury or death.

CAUTION

Do not manually operate contactors. Serious damage to the machine may result.

Electrical shock can cause personal injury. Disconnect all electrical power before servicing.

1. Check that all power to unit is off. Carefully disconnect all wires from the defective module by unplugging its connectors.

2. Remove the defective module by removing its mounting screws with a Phillips screwdriver, and removing the module from the control box. Save the screws for later use.

3. Verify that the instance jumper (MBB) or address switches (all other modules) exactly match the settings of the defective module.

NOTE: Handle boards by mounting standoffs only to avoid electrostatic discharge.

4. Package the defective module in the carton of the new module for return to Carrier.

COMPRESSOR REPLACEMENT — To change out a faulty compressor, refer to the compressor replacement procedure included with the new compressor.

OIL CHARGE — Compressors are factory charged with 110 oz of POE oil. Refer to Oil Charge section page 47 for proper oil and charge procedure.

MAINTENANCE

Recommended Maintenance Schedule —

lowing are only recommended guidelines. Jobsite conditions may dictate that maintenance schedule is performed more often than recommended.

59

The fol-

Every month:

• Check condenser coils for debris, clean as necessary.

• Check moisture indicating sight glass for possible refrigerant loss and presence of moisture.

Every 3 months:

• Check refrigerant charge.

• Check all refrigerant joints and valves for refrigerant leaks, repair as necessary.

• Check fan status switch operation.

• Check condenser coils for debris.

• Check all condenser fans for proper operation.

• Check compressor oil level.

• Check crankcase heater operation.

Every 12 months:

• Check all electrical connections, tighten as necessary.

• Inspect all contactors and relays, replace as necessary.

• Check accuracy of thermistors, replace if greater than ± 2° F (1.2° C) variance from calibrated thermometer.

• Obtain and test an oil sample. Change oil only if necessary.

• Check refrigerant filter driers for excessive pressure drop, replace as necessary.

• Check condition of condenser fan blades and ensure they are securely fastened to the motor shaft.

• Perform service test to confirm operation of all components.

Microchannel Heat Exchanger (MCHX) Condenser Coil Maintenance and Cleaning Recommendations

TROUBLESHOOTING

Complete Unit Stoppage and Restart —

ble causes for unit stoppage and reset methods are shown below. (See Table 26 also.) Refer to Fig. 1-3 and 8-17 for component arrangement and control wiring diagrams.

GENERAL POWER FAILURE — After power is restored, restart is automatic through normal MBB start-up.

UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS OFF — When the switch is OFF, the unit will stop immediately. Place the switch in the ENABLE position for local switch control or in the REMOTE CONTACT position for control through remote contact closure.

FAN STATUS INPUT OPEN — After the problem causing the fan status input to be open has been corrected, reset is automatic by closing the fan status input.

OPEN 24-V CONTROL CIRCUIT BREAKER(S) — Determine the cause of the failure and correct. Reset circuit breaker(s). Restart is automatic after MBB start-up cycle is complete.

COOLING LOAD SATISFIED — Unit shuts down when cooling load has been satisfied. Unit restarts when required to satisfy set point.

THERMISTOR FAILURE — If a thermistor fails in either an open or shorted condition, the unit will be shut down. Replace SAT or RAT as required. Unit restarts automatically, but must be reset manually by resetting the alarm with the scrolling marquee as shown in Table 27.

Possi-

CAUTION

Do not apply any chemical cleaners to MCHX condenser coils. These cleaners can accelerate corrosion and damage the coil.

Routine cleaning of coil surfaces is essential to maintain

proper operation of the unit. Elimination of contamination and removal of harmful residues will greatly increase the life of the coil and extend the life of the unit. The following steps should be taken to clean MCHX condenser coils:

1. Remove any foreign objects or debris attached to the coreface or trapped within the mounting frame and brackets.

2. Put on personal protective equipment including safetyglasses and/or face shield, waterproof clothing and gloves. It is recommended to use full coverage clothing.

3. Start high pressure water sprayer and purge any soap or industrial cleaners from sprayer before cleaning condenser coils. Only clean, potable water is authorized for cleaning condenser coils.

4. Clean condenser face by spraying the core steady and uniformly from top to bottom while directing the spray straight toward the core. Do not exceed 900 psig or 30 degree angle. The nozzle must be at least 12 in. from the core face. Reduce pressure and use caution to prevent damage to air centers.

CAUTION

Excessive water pressure will fracture the braze between air centers and refrigerant tubes.

If unit stoppage occurs more than once as a result of any of the safety devices listed, determine and correct cause before attempting another restart.

COMPRESSOR SAFETIES — The 38AP units with Com- fortLink™ controls include a compressor protection board that protects the operation of each of the compressors. Each board senses the presence or absence of current to each compressor.

If there is a command for a compressor to run and there is no current, then one of the following safeties or conditions have turned the compressor off:

Compressor Overcurrent

— All compressors have internal line breaks or a motor protection device located in the compressor electrical box.

Compressor Short Circuit

— There will not be current if the compressor circuit breaker that provides short circuit protection has tripped.

Compressor Motor Over Temperature

— The internal line-

break or over temperature switch has opened. High-Pressure Switch Trip

— The high pressure switch has opened. Below are the factory settings for the fixed high pressure switch.

38AP UNIT

SIZE

025-100 650 4482 500 3447

ASTP Protection Trip

CUTOUT CUT-IN

psig kPa psig kPa

— All non-digital Copeland compressors are equipped with an advanced scroll temperature protection (ASTP). A label located above the terminal box identifies models that contain this technology. See Fig. 65.

60

Advanced scroll temperature protection is a form of internal

Fig. 66 — Recommended Minimum Cool Down

Time After Compressor is Stopped*

0

10

20

30

40

50

60

70

80

90

100

110

120

0 10203040 5060708090

Compressor Unloaded Run Time (Minutes)

Recommended Cooling Ti me

(Mi

nut

es)

*Times are approximate. NOTE: Various factors, including high humidity, high ambient temperature, and the presence of a sound blanket will increase cool-down times.

ENTER

Fig. 65 — Advanced Scroll Temperature

Protection Label

discharge temperature protection that unloads the scroll compressor when the internal temperature reaches approximately 300 F. At this temperature, an internal bi-metal disk valve opens and causes the scroll elements to separate, which stops compression. Suction and discharge pressures balance while the motor continues to run. The longer the compressor runs unloaded, the longer it must cool before the bi-metal disk resets. See Fig. 66 for approximate reset times.

To manually reset ASTP, the compressor should be stopped and allowed to cool. If the compressor is not stopped, the motor will run until the motor protector trips, which occurs up to 90 minutes later. Advanced scroll temperature protection will reset automatically before the motor protector resets, which may take up to 2 hours.

Compressor Time Guards

— For compressors, the control will use a Compressor Minimum OFF Time of 2 minutes or a Compressor Minimum ON Time of 3 minutes.

High Discharge Gas Temperature Protection equipped with digital compressors have an additional thermistor located on the discharge line, If discharge temperature exceeds 265 F (129.4 C), the digital compressor will be shut off.

Alarms will also occur if the current sensor board malfunctions or is not properly connected to its assigned digital input. If the compressor is commanded OFF and the current sensor reads ON, an alert is generated. This will indicate that a compressor contactor has failed closed. In this case, a special mode, Compressor Stuck on Control, will be enabled and all other compressors will be turned off. An alarm will then be enabled to indicate that service is required. Outdoor fans will continue to operate. The first outdoor fan stage is turned on immediately. The other stages of fan will be turned on as required by SCT.

— Units

Low Saturated Suction

— Several conditions can lead to low saturated suction alarms. The controls have several override modes built in which will attempt to keep the unit from shutting down. Low airflow, low refrigerant charge and plugged filter driers are the main causes for this condition. To avoid permanent damage, do NOT repeatedly reset these alert and/or alarm conditions without identifying and correcting the cause(s).

Alarms and Alerts — These are warnings of abnormal

or fault conditions, and may cause either one circuit or the whole unit to shut down. They are assigned code numbers as described in Table 26.

Automatic alarms will reset without operator intervention if the condition corrects itself. The following method must be used to reset manual alarms (refer to Table 27):

Before resetting any alarm, first determine the cause of the alarm and correct it. After determining and correcting the cause of the alarm, enter the Alarm mode indicated by the LED on the side of the scrolling marquee display. Press and

until the sub-menu item RCRN “RESET ALL CURRENT ALARMS” is displayed. Press . The control will prompt the user for a password, by displaying PASS and WORD. Press to display the default password, 1111. Press for each character. If the password has been changed, use the arrow keys to change each individual character. Toggle the display to “YES” and press . The alarms will be reset.

DIAGNOSTIC ALERT CODES AND POSSIBLE CAUSES

T048 (Circuit A Compressor Availability Alert) T049 (Circuit B Compressor Availability Alert) — Alert

codes 048 and 049 are for circuits A and B respectively. These alerts occur when two compressors are unavailable to run on a 3 compressor circuit. This alert can only occur on single circuit unit sizes 040-060 and three compressor circuit unit sizes 70-

100. The control ensures proper oil return by insuring a circuit does not operate with one compressor for longer than one hour of cumulative run time.

COMPRESSOR FAILURE ALERTS T051, T052, T053 (Circuit A Compresser Failures) T055, T056, T057 (Circuit B Compressor Failures) — Alert

codes 051, 052, 053, 55, 56 and 057 are for compressors A1, A2, A3, B1, B2, and B3 respectively. These alerts occur when the current sensor (CS) does not detect compressor current during compressor operation. When this occurs, the control turns off the compressor.

If the current sensor board reads OFF while the compressor

relay has been commanded ON, an alert is generated. POSSIBLE CAUSES Compressor Overload

load protector is open or the external overload protector (Kriwan module) has activated. The external overload protector modules are mounted in the compressor wiring junction box. Temperature sensors embedded in the compressor motor windings are the inputs to the module. The module is powered with 24 vac from the units main control box. The module output is a normally closed contact that is wired in series with the compressor contactor coil. In a compressor motor overload condition, contact opens, deenergizing the compressor contactor.

Low Refrigerant Charge extended period of time with low refrigerant charge, the compressor ASTP device will open, which will cause the compressor to trip on its overload protection device.

Circuit Breaker Trip short circuit by a breaker in the control box.

61

— Either the compressor internal over-

— If the compressor operates for an

— The compressors are protected from

Wiring Error sor to start.

To check out alerts T051-T057:

1. Turn on the compressor in question using Service Test

2. If the compressor does start, verify it is rotating in the cor-

IMPORTANT: Prolonged operation in the wrong direction can damage the compressor. Correct rotation can be verified by a gage set and looking for a differential pressure rise on start-up.

IMPORTANT: If the CS is always detecting current, verify that the compressor is on. If the compressor is on, check the contactor and the relay on the MBB. If the compressor is off and there is no current, verify the CS wiring and replace if necessary.

IMPORTANT: Return to Normal mode and observe compressor operation to verify that compressor current sensor is working and condenser fans are energized.

COMPRESSOR STUCK ON FAILURE ALARMS Circuit A A051, A052, A053 Circuit B A055, A056, A057 — Alarm codes 051, 052, 053,

055, 056 and 057 are for compressors A1, A2, A3, B1, B2 and B3. These alarms occur when the current sensor (CS) detects current when the compressor should be off. When this occurs, the control turns off the compressor.

If the current sensor board reads ON while the compressor relay has been commanded OFF for a period of 4 continuous seconds, an alarm is generated. These alarms are only monitored for a period of 10 seconds after the compressor relay has been commanded OFF. This is done to facilitate a service technician forcing a relay to test a compressor.

In addition, if a compressor stuck failure occurs and the current sensor board reports the compressor and the request off, certain diagnostics will take place as follows:

1. If any of the compressors are diagnosed as stuck on and

2. The control will shut off all other compressors.

To check out alarms A051-A057:

1. Place the unit in Service Test mode. All compressors

2. Verify that there is not 24-v at the contactor coil. If there

3. Check for welded contactor.

4. Verify CS wiring.

5. Return to Normal mode and observe compressor opera-

A060 (Supply Air Thermistor Failure) quired to use the supply air thermistor input (C.TYP 1, 3, 5, and

9) and the sensor reading is outside the range of –40 to 245 F (–40 to 118 C) then the alarm will occur. The cause of the alarm is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection. If the supply temperature is being written to by CCN or a third party

— A wiring error might not allow the compres-

mode. If the compressor does not start, then most likely the problem is one of the following: HPS open, open internal protection, circuit breaker trip, incorrect safety wiring, or incorrect compressor wiring.

rect direction.

the current sensor board is on and the request is off, the control will command the condenser fans to maintain normal head pressure.

The possible causes include welded contactor or frozen compressor relay on the MBB.

should be off.

is 24 v at the contactor, check relay on MBB and wiring.

tion to verify that compressor current sensor is working and condenser fans are energized.

— If the unit is re-

control, the supply-air temperature must be updated every 3 minutes. If it is not updated, then the alarm will be generated. Failure of this thermistor will shut down the entire unit.

A061 (Return Air Thermistor Failure) quired to use the return air thermistor input (C.TYP 1, 3, 5, and

9) and the sensor reading is outside the range of –40 to 245 F (–40 to118 C) then the alarm will occur. The cause of the alarm is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection. If the return temperature is being written to by CCN or a third party control, the return-air temperature must be updated every 3 minutes. If it is not updated, then the alarm will be generated. Failure of this thermistor will shut down the entire unit.

T068, T69 (Circuit A,B Compressor Return Gas Temperature Thermistor Failure) — This alert occurs when the compressor return gas temperature sensor is outside the range of –40 to 245 F (–40 to 118 C). Failure of this thermistor will disable any elements of the control which requires its use.

T073 (Outside Air Temperature Thermistor Failure) alert occurs when the outside air temperature sensor is outside the range of –40 to 245 F (–40 to 118 C). Failure of this thermistor will disable any elements of the control which requires its use.

T074 (Space Temperature Thermistor Failure) occurs when the space temperature sensor is outside the range of –40 to 245 F (–40 to 118 C). Failure of this thermistor will disable any elements of the control which requires its use. If the unit is configured for SPT 2 stage or SPT multi-stage operation and the sensor fails, no cooling mode may be chosen. The cause of the alert is usually a faulty thermistor in the T55, T56, or T58 device, a shorted or open thermistor caused by a wiring error, or a loose connection.

T090 (Circuit A Discharge Pressure Transducer Failure) T091 (Circuit B Discharge Pressure Transducer Failure) —

Alert codes 090 and 091 are for circuits A and B respectively. These alerts occur when the pressure is outside the range of 0.0 to 667.0 psig. A circuit cannot run when this alert is active. Use the scrolling marquee to reset the alert. The cause of the alert is usually a faulty transducer, faulty 5-v power supply, or a loose connection.

T092 (Circuit A Suction Pressure Transducer Failure) T093 (Circuit B Suction Pressure Transducer Failure) —

Alert codes 092 and 093 are for circuits A and B respectively. These alerts occur when the pressure is outside the range of 0.0 to 420.0 psig. A circuit cannot run when this alert is active. Use the scrolling marquee to reset the alert. The cause of the alert is usually a faulty transducer, faulty 5-v power supply, or a loose connection.

T094 (Discharge Gas Thermistor Failure) curs for units which have the digital compressor installed on circuit A. If discharge gas temperature is open or shorted, the circuit will be shutoff. The alert will reset itself when discharge temperature is less than 250 F (121.1 C). The cause of the alert is usually low refrigerant charge or a faulty thermistor.

T110 (Circuit A Loss of Charge) T111 (Circuit B Loss of Charge) — Alert codes 110 and 111

are for circuits A and B respectively. These alerts occur when the compressor is OFF and the suction pressure is less than 26 psig.

T112 (Circuit A High Saturated Suction Temperature) T113 (Circuit B High Saturated Suction Temperature) —

Alert codes 112 and 113 occur when compressors in a circuit have been running for at least 5 minutes and the circuit saturated suction temperature is greater than 70 F (21.1 C). The high saturated suction alert is generated and the circuit is shut down.

— If the unit is re-

— This

— This alert

— This alert oc-

62

T114 (Circuit A Low Superheat) T115 (Circuit B Low Superheat) — Alert codes 114 and 115 occur when the superheat of a circuit is less than 5 F (2.8 C) for 5 continuous minutes. The low superheat alert is generated and the circuit is shut down.

T118 (High Discharge Gas Temperature Alert) A118 (High Discharge Gas Temperature Alarm) — This

alert or alarm occurs for units which have the digital compressor installed on circuit A. If discharge gas temperature is greater than 268 F (131.1 C), the circuit will be shut off. The alert will reset itself when discharge temperature is less than 250 F (121.1 C). If this alert occurs 3 times within a day, the A118 alarm will be generated and the alarm must be reset manually. The cause of the alert is usually low refrigerant charge or a faulty thermistor.

P120 (Circuit A Low Saturated Suction Temperature — Compressor Shutdown)

T120 (Circuit A Low Saturated Suction Temperature Alert) A120 (Circuit A Low Saturated Suction Temperature

Alarm) P121 (Circuit B Low Saturated Suction Temperature —

Compressor B2 Shutdown) T121 (Circuit B Low Saturated Suction Temperature Alert) A121 (Circuit B Low Saturated Suction Temperature

Alarm) — This alert or alarm is used to keep the evaporator from freezing and the saturated suction temperature above the low limit for the compressors.

When SSTA or SSTB is less than 20 F (–6.7 C) for 4 minutes, less than 10 F (–12.2 C) for 2 minutes, less than 0° F (–17.8 C) for 1 minute, or less than –20 F (–28.9 C) for 20 seconds continuously, one compressor of the affected circuit will be shut down with a local alert (P120, P121) and a 10-minute time guard will be added to the compressor. If saturated suction temperature continues to be less than 20 F (–6.7 C) for 4 minutes, less than 10 F (–12.2 C) for 2 minutes, less than 0° F (–17.8 C) for 1 minute, or less than –20 F (–28.9 C) for 20 seconds continuously, then another compressor will be shut down until the last compressor on the circuit is shut down at which time an alert or alarm will be issued (T120, T121, A120, A121).

This failure follows a 3 strike methodology whereby the first two times a circuit goes down entirely, an alert will be generated (T120, T121) which keeps the circuit off for 15 minutes before allowing the circuit to try again. The third time this happens, an alarm (A120, A121) will be generated which will necessitate a manual reset to get the circuit back running.

To recover from these alerts, a 10-minute hold off timer must elapse and the saturated suction temperature must rise above 29.32 F (–1.5 C). If recovery occurs, staging will be allowed on the circuit again. Therefore, it is possible that multiple P120 or P121 alerts may be stored in the alarm.

If there are 1 or 2 strikes on the circuit and the circuit recovers for a period of time, it is possible to clear out the strikes thereby resetting the strike counter automatically. The control must have saturated suction temperature greater than or equal to 34 F (1.1 C) for 60 minutes in order to reset the strike counters.

T122 (Circuit A High Pressure Trip) T123 (Circuit B High Pressure Trip) — Alert codes 122 and

123 are for circuits A and B respectively. T126 (Circuit A High Head Pressure) T127 (Circuit B High Head Pressure) — Alert codes 126 and

127 are for circuits A and B respectively. These alerts occur when the appropriate saturated condensing temperature is greater than 150 F (65.6 C). Prior to the alert, the control will shut down one compressor on a circuit if that circuit's saturated condensing temperature is greater than 145 F (62.8 C). If SCT

continues to rise to greater than 150 F (65.6 C), the alert will occur and the circuit's remaining compressor will shut down. The cause of the alarm is usually an overcharged system, high outdoor ambient temperature coupled with dirty outdoor coil, plugged filter drier, or a faulty high-pressure switch.

A140 (Reverse Rotation Detected) power up, for suction pressure change on the first activated circuit. The unit control determines failure as follows:

1. The suction pressure of both circuits is sampled 5 seconds before the compressor is brought on, right when the compressor is brought on and 5 seconds afterwards.

2. The rate of suction pressure change from 5 seconds before the compressor is brought on to when the compressor is brought on is calculated.

3. The rate of suction pressure change from when the compressor is brought on to 5 seconds afterwards is calculated.

4. With the above information, the test for reverse rotation is made. If the suction pressure change 5 seconds after compression is greater than the suction pressure change 5 seconds before compression – 1.25, then there is a reverse rotation error.

This alarm will disable mechanical cooling and will require manual reset. This alarm may be disabled once the reverse rotation check has been verified by setting REV.R = Yes.

A150 (Unit is in Emergency Stop) stop command is received, the alarm is generated and the unit will be immediately stopped.

If the CCN point name "EMSTOP" in the system table is set to emergency stop, the unit will shut down immediately and broadcast an alarm back to the CCN, indicating that the unit is down. This alarm will clear when the variable is set back to "enable."

A151 (Illegal Configuration) invalid configuration has been entered. The following are illegal configurations.

• Invalid unit size has been entered.

• Dual thermostat configured for single-circuit unit.

• Dual thermostat and switch demand limit configure

• AUX board incorrect revision.

• Unit configuration set to invalid type. A152 (Unit Down Due to Failure)

due to alerts and/or alarms. Reset is automatic when all alarms are cleared. This alarm indicates the unit is at 0% capacity.

T153 (Real Time Clock Hardware Failure) has been detected with MBB real time clock hardware. Try resetting the power and check the indicator lights. If the alarm continues, the board should be replaced.

A154 (Serial EEPROM Hardware Failure) has been detected with the EEPROM on the MBB. Try resetting the power and check the indicator lights. If the alarm continues, the board should be replaced.

T155 (Serial EEPROM Storage Failure Error) has been detected with the EEPROM storage on the MBB. Try resetting the power and check the indicator lights. If the alert continues, the board should be replaced.

A156 (Critical Serial EEPROM Storage Failure Error) problem has been detected with the EEPROM storage on the MBB. Try resetting the power and check the indicator lights. If the alarm continues, the board should be replaced.

A157 (A/D Hardware Failure) ed with A/D conversion on the boards. Try resetting the power and check the indicator lights. If the alarm continues, the board should be replaced.

— A test is made once, on

— If the CCN emergency

— An A151 alarm indicates an

— Both circuits are off

— A problem

— A

— A problem has been detect-

63

A170 (Loss of Communication with the Compressor Expansion Module) — This alarm indicates that there are communications problems with the compressor expansion, which is required for unit sizes 070 to 100. The alarm will automatically reset.

A173 (Energy Management Module Communication Failure) — This alarm indicates that there are communications problems with the energy management. All functions performed by the EMM will stop, which can include demand limit, reset and capacity input. The alarm will automatically reset.

T174 (4 to 20 mA Cooling Set point Input Failure)

— This alert indicates a problem has been detected with cooling set point 4 to 20 mA input. The input value is either less than 2 mA or greater than 22 mA.

T176 (4 to 20 mA Reset Input Failure)

— This alert indicates a problem has been detected with reset 4 to 20 mA input. The input value is either less than 2 mA or greater than 22 mA. The reset function will be disabled when this occurs.

T177 (4 to 20 mA Demand Limit Input Failure)

— This alert indicates a problem has been detected with demand limit 4 to 20 mA input. The input value is either less than 2 mA or

greater than 22 mA. The reset function will be disabled when this occurs.

A200 (Fan Status Switch 1 Failure) T201 (Fan Status Switch 1 Failure) T202 (Fan Status Switch 2 Failure) — This alarm or alert indicates the fan status input 1 or 2 is open when the unit is ON. The unit will be in an alert condition until the fan status switch is closed. The alarm or alert is an automatic reset when the fan status switch closes. The A200 alarm is for single circuit units.

T303 (Condenser Coil Maintenance Due) Countdown (C.L.DN) expired. Complete condenser coil cleaning and enter ‘YES’ for Coil Maintenance Done (C.L.MN) item.

T500, T501, T502 (Current Sensor Board Failure — A xx Circuit A)

T503, T504, T505 (Current Sensor Board Failure — B xx Circuit B) — Alert codes 500, 501, 502, 503, 504, and 505 are for compressors A1, A2, A3, B1, B2, and B3 respectively. These alerts occur when the output of the current sensor (CS) is a constant high value. These alerts reset automatically. If the problem cannot be resolved, the CS board must be replaced.

Table 26 — Alarm and Alert Codes

ALARM/

ALERT CODE

T048 Alert

T049 Alert

T051, T052, T053 Alert

T055, T056, T057 Alert

A051, A052, A053 Alarm

A055, A056, A057 Alarm

A060 Alarm

A061 Alarm

T068 Alert

T069 Alert

T073 Alert

T074 Alert

T090 Alert

T091 Alert

T092 Alert

T093 Alert

T094 Alert

CCN — Carrier Comfort Network CSB — Current Sensor Board MBB — Main Base Board CXB — Compressor Expansion Module SCT — Saturated Condensing Temperature DTT — Discharge Temperature Thermistor SST — Saturated Suction Temperature EEPROM — Electrically Erasable Programmable

EMM — Energy Management Module

ALARM OR

ALERT

Read-Only Memory

DESCRIPTION WHY WAS THIS ALARM GENERATED?

Circuit A Compressor

Availability Alert

Circuit B Compressor

Availability Alert

Circuit A

Compressor A1,A2,A3

Failure

Circuit B

Compressor B1,B2,B3

Failure

Circuit A

Compressor A1,A2,A3

Failure

Circuit B

Compressor B1,B2,B3

Failure

Supply Air

Thermistor Failure

Supply Air Temperature

Update not received

Return Air

Thermistor Failure

Return Air Temperature

Update not received

Circuit A Return Gas

Thermistor Failure

Circuit B Return Gas

Thermistor Failure

Outside Air

Thermistor Failure

Space Temperature

Thermistor Failure

Circuit A Discharge Pres-

sure Transducer Failure

Circuit B Discharge Pres-

sure Transducer Failure

Circuit A Suction Pressure

Transducer Failure

Circuit B Suction Pressure

Transducer Failure

Discharge Gas

Thermistor Failure

LEGEND

®

LWT — Leaving Fluid Temperature

TSTAT — Thermostat

Two compressors on circuit failed Circuit shut down Manual

Respective current sensor board (CSB)

feedback signal does not match relay state

Respective current sensor board (CSB)

feedback signal does not match relay state

Respective current sensor board (CSB)

feedback signal is ON when the compressor

Respective current sensor board (CSB)

feedback signal is ON when the compressor

Thermistor outside range of –40 to 245 F

Temperature not updated during 3 minutes Unit shut down Automatic

Thermistor outside range of –40 to 245 F

Temperature not updated during 3 minutes Unit shut down Automatic

Thermistor is outside range of –40 to 245 F

Thermistor outside range of –40 to 245 F

The pressure is outside the range of

should be off

(–40 to 118 C)

0.0 to 667.0 psig

0.0 to 420.0 psig

Discharge thermistor (DTT) is

either open or shorted

— Coil Service

ACTION TAKEN

BY CONTROL

Respective compressor shut

down in Circuit A.

Respective compressor shut

down in Circuit B.

Unit shut down Manual

Unit shut down Automatic

Circuit shut down Automatic

Temperature reset disabled.

Unit runs under normal

control/set points.

Temperature reset disabled.

Unit runs under normal

control/set points.

Circuit A shut down Automatic

Circuit B shut down Automatic

Circuit A shut down Automatic

Circuit B shut down Automatic

Digital compressor shut down. Automatic

RESET

METHOD

Manual

Autom atic

64

Table 26 — Alarm and Alert Codes (cont)

ALARM/

ALERT CODE

T110 Alert Circuit A Loss of Charge

T111 Alert Circuit B Loss of Charge

T112 Alert

T113 Alert

T114 Alert

T115 Alert

T118 Alert

A118 Alarm

P120 Alert

T120 Alert

A120 Alarm

P121 Alert

T121 Alert

A121 Alarm

T122 Alert

T123 Alert

T126 Alert

A126 Alarm

T127 Alert

A127 Alarm

A140 Alarm Reverse Rotation Detected Incoming unit power leads not phased correctly Unit shut down. Manual

A150 Alarm Emergency Stop CCN emergency stop command received

A151 Alarm Illegal Configuration One or more illegal configurations exists. Unit is not allowed to start.

A152 Alarm Unit Down Due to Failure Both circuits are down due to alarms/alerts. Unit is unable to run.

CCN — Carrier Comfort Network CSB — Current Sensor Board MBB — Main Base Board CXB — Compressor Expansion Module SCT — Saturated Condensing Temperature DTT — Discharge Temperature Thermistor SST — Saturated Suction Temperature EEPROM — Electrically Erasable Programmable

EMM — Energy Management Module

ALARM OR

ALERT

Read-Only Memory

DESCRIPTION WHY WAS THIS ALARM GENERATED?

If the compressors are off and discharge pressure

reading is less than 26 psig for 30 sec.

If the compressors are off and discharge pressure

Circuit A High Saturated

Suction Temperature

Circuit B High Saturated

Suction Temperature

Circuit A Low Suction

Superheat

Circuit B Low Suction

Superheat

High Discharge

Gas Temperature

High Discharge

Gas Temperature

Circuit A Low

Saturated Suction

Circuit A Low

Saturated Suction

Circuit A Low

Saturated Suction

Circuit A Low

Saturated Suction

Circuit B Low

Saturated Suction

Circuit B Low

Saturated Suction

High Pressure Switch

Trip Circuit A

High Pressure Switch

Trip Circuit B

Circuit A High

Discharge Pressure

Circuit A High

Discharge Pressure

Circuit B High

Discharge Pressure

Circuit B High

Discharge Pressure

LEGEND

®

LWT — Leaving Fluid Temperature

TSTAT — Thermostat

reading is less than 26 psig for 30 sec.

Circuit is on and saturated suction temperature is

greater than 70 F (15.6 C) for 5 minutes

Circuit is on and saturated suction temperature is

greater than 70 F (15.6 C) for 5 minutes

Suction superheat is less than 5 F (2.8 C)

Discharge Thermistor (DTT) reading is

3 Discharge Gas Temperature alarms

SSTA is less than 20 F for 4 minutes, less than

10 F for 2 minutes, less than 0° F for 1 minute or

less than –20 F for 20 seconds continuously

SSTA is less than 20 F for 4 minutes, less than

10 F for 2 minutes, less than 0° F for 1 minute or

less than –20 F for 20 seconds continuously

SSTA is less than 20 F for 4 minutes, less than 10 F for 2 minutes, less than 0° F for 1 minute or less than –20 F for 20 seconds continuously and

SSTB is less than 20 F for 4 minutes, less than

10 F for 2 minutes, less than 0° F for 1 minute or

less than –20 F for 20 seconds continuously

SSTB is less than 20 F for 4 minutes, less than 10 F for 2 minutes, less than 0° F for 1 minute or less than –20 F for 20 seconds continuously and

High Pressure A Switch Input opento MBB Circuit shut down Manual

High Pressure B Switch Input open to MBB Circuit shut down Manual

for 5 minutes.

greater than 250 F

occur within a day

only one compressor running

SCTA >150 F Circuit shut down

SCTA >150 F Circuit shut down Manual

SCTB >150 F Circuit shut down

SCTB >150 F Circuit shut down Manual

ACTION TAKEN

BY CONTROL

Circuit not allowed to start. Manual

Circuit shut down Manual

Circuit A is shut down after

pumpdown complete.

Circuit B is shut down after

pumpdown complete.

Compressor A1 shut down Automatic

Compressor A1 shut down Manual

Circuit A will remove one

compressor stage.

Circuit A shut down

Circuit A shut down Manual

Circuit B will remove one

compressor stage.

Circuit B shut down

Circuit B shut down Manual

Unit shutdown without going

through pumpdown.

Automatic after first

CCN command for

configuration errors

cleared that prevent

RESET

METHOD

daily occurance,

manual

thereafter

daily occurance,

manual

thereafter

Autom atic

unless

3rd strike.

Autom atic

unless

3rd strike.

Automatic, only

after first 3 daily

occurrences.

Automatic, only

after first 3 daily

occurrences

Automatic once

EMSTOP returns

to normal

Manual once

are corrected

Automatic once

alarms/alerts are

the chiller from

starting.

65

Table 26 — Alarm and Alert Codes (cont)

ENTER

ESCAPE

ENTER

ALARM/

ALERT CODE

T153 Alert

A154 Alarm

T155 Alert

A156 Alarm

A157 Alarm A/D Hardware Failure Hardware failure with peripheral device Unit is not allowed to run. Manual

A170 Alarm

A173 Alarm

T174 Alert

T176 Alert

T177 Alert

A200 Alarm

T201 Alert

T202 Alert

T303 Alert

T500 Alert

T501 Alert

T502 Alert

T503 Alert

T504 Alert

T505 Alert

CCN — Carrier Comfort Network CSB — Current Sensor Board MBB — Main Base Board CXB — Compressor Expansion Module SCT — Saturated Condensing Temperature DTT — Discharge Temperature Thermistor SST — Saturated Suction Temperature EEPROM — Electrically Erasable Programmable

EMM — Energy Management Module

ALARM OR

ALERT

Read-Only Memory

DESCRIPTION WHY WAS THIS ALARM GENERATED?

Real Time Clock

Hardware Failure

Serial EEPROM

Hardware Failure

Serial EEPROM

Storage Failure

Critical Serial EEPROM

Storage Failure

Loss of Communication

with CXB

Loss of Communication

with EMM

4 to 20 mA Cooling Set

Point/Desired % Capacity

Input Failure

4 to 20 mA Temperature

Reset Input Failure

4 to 20 mA Demand Limit

Input Failure

Fan Status

Switch 1 Open

Fan Status Switch 1

is open with Dual TSTAT

configuration

Fan Status Switch 2

is open with Dual TSTAT

configuration

Condenser Coil

Maintenance Due

Current Sensor Board

A1 Failure

Current Sensor Board

A2 Failure

Current Sensor Board

A3 Failure

Current Sensor Board

B1 Failure

Current Sensor Board

B2 Failure

Current Sensor Board

B3 Failure

LEGEND

®

LWT — Leaving Fluid Temperature

TSTAT — Thermostat

Complete condenser coil cleaning and enter ‘YES’

Internal clock on MBB fails

Hardware failure with MBB Unit is unable to run. Manual

Configuration/storage failure with MBB No action Manual

Configuration/storage failure with MBB Unit is not allowed to run. Manual

MBB loses communication with CXB CXB functions disabled Automatic

MBB loses communication with EMM

If configured with EMM and input less than

2 mA or greater than 22 mA

If configured with EMM and input less than

2 mA or greater than 22 mA

If configured with EMM and input less than

2 mA or greater than 22 mA

Alarm is generated when fan status switch 1

is open when the unit is in an ON state

Alert is generated when fan status switch 1

is open when Y1 or Y2 are closed

Alert is generated when fan status switch 1

is open when Y3 or Y4 are closed

Coil Service Countdown (C.L.DN) expired.

for Coil Maintenance Done (C.L.MN) item.

Alert occurs when CSB output

is a constant high value

Alert occurs when CSB output

is a constant high value

Alert occurs when CSB output

is a constant high value

Alert occurs when CSB output

is a constant high value

Alert occurs when CSB output

is a constant high value

Alert occurs when CSB output

is a constant high value

ACTI ON TAKEN

BY CONTROL

Occupancy schedule will not

be used. Unit defaults to

Local On mode.

4 to 20 mA temperature

reset disabled. Demand Limit

set to 100%. 4 to 20 mA

set point disabled.

Set point function/%

capacity function disabled.

Reset function disabled.

Unit returns to normal

set point control.

Demand limit function

disabled. Unit returns to

100% demand limit control.

Unit not allowed to start Automatic

Circuit A is not allowed to run Automatic

Circuit B is not allowed to run Automatic

None Automatic

Compressor A1 shut down Automatic

Compressor A2 shut down Automatic

Compressor A3 shut down Automatic

Compressor B1 shut down Automatic

Compressor B2 shut down Automatic

Compressor B3 shut down Automatic

RESET

METHOD

Automatic when

correct clock

control restarts.

Autom atic

Table 27 — Example of Reading and Clearing Alarms

SUB-MODE

CRNT AXXX or TXXX CURRENTLY ACTIVE ALARMS

CRNT

RCRN

KEYPAD

ENTRY

ITEM ITEM EXPANSION COMMENT

NO Use to clear active alarms/alerts

NO NO Flashes

YES Select YES

NO Alarms/alerts clear, YES changes to NO

66

ACTIVE ALARMS (AXXX) OR ALERTS (TXXX) DISPLAYED.

APPENDIX A — DISPLAY TABLES

Run Status Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

VIEW RAT xxx.x ºF Return Air Temperature

SAT xxx.x ºF Supply Air Temperature SETP xxx.x ºF Active Set Point CTPT xxx.x ºF Control Point

LOD.F xxx Load/Unload Factor

0=Service Test

1=Off Local

2=Off CCN 3=Off Time

4=Off Emrgcy

5=On Local

6=On CCN 7=On Time

0=COOL OFF

1=LO COOL

2=HI COOL

3=COOL ON

1 - 12 (1 = January,

2 = February, etc.)

RUN

HOUR

STAT Control Mode

SPT.M Space Temp Control Mode

OCC YES/NO Occupied

MODE YES/NO Override Modes in Effect

CAP xxx Percent Total Capacity STGE x Requested Stage ALRM xxx Current Alarms & Alerts

TIME xx.xx Time of Day 00:00-23:59

MNTH xx Month of Year

DATE xx Day of Month 01-31

YEAR xx Year of Century

UNIT RUN HOUR AND START HRS.U xxxx HRS Machine Operating Hours STR.U XXXX Machine Starts

CIRC AND COMP RUN HOURS HRS.A xxxx HRS Circuit A Run Hours HRS.B xxxx HRS Circuit B Run Hours

HR.A1 xxxx HRS Compressor A1 Run Hours HR.A2 xxxx HRS Compressor A2 Run Hours HR.A3 xxxx HRS Compressor A3 Run Hours HR.B1 xxxx HRS Compressor B1 Run Hours HR.B2 xxxx HRS Compressor B2 Run Hours HR.B3 xxxx HRS Compressor B3 Run Hours

67

APPENDIX A — DISPLAY TABLES (cont)

Run Status Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

COMPRESSOR STARTS ST.A1 XXXX Compressor A1 Starts ST.A2 XXXX Compressor A2 Starts

STRT

PM

VERS

ST.A3 XXXX Compressor A3 Starts ST.B1 XXXX Compressor B1 Starts ST.B2 XXXX Compressor B2 Starts ST.B3 XXXX Compressor B3 Starts

PREVENTIVE MAINTENANCE

COIL COIL MAINTENANCE

SI.CL xxxx HRS Coil Cleaning Srvc Int

C.L.DN xxxx HRS Coil Service Countdown

C.L.MN YES/NO Coil Cleaning Maint.Done User Entry

CL.DT COIL MAINTENANCE DATES C.L.M0 MM/DD/YY HH:MM C.L.M1 MM/DD/YY HH:MM C.L.M2 MM/DD/YY HH:MM C.L.M3 MM/DD/YY HH:MM C.L.M4 MM/DD/YY HH:MM

SOFTWARE VERSION NUMBERS

MBB CESR131279-XXXXX

AUX CESR131333-XXXXX CXB CESR131173-XXXXX

EMM CESR131174-XXXXX

MARQ CESR131171-XXXXX

NAVI CESR130227-XXXXX

Service Test Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

To enable Service Test mode, move

TEST Service Test Mode

OUTPUTS FAN1 ON/OFF Fan 1 Relay FAN2 ON/OFF Fan 2 Relay FAN3 ON/OFF Fan 3 Relay FAN4 ON/OFF Fan 4 Relay

OUTS

CMPA

CMPB

FAN5 ON/OFF Fan 5 Relay

V.HPA xx Var Head Press % Cir A V.HPB xx Var Head Press % Cir B

DIG.P xx Comp A1 Load Percent LSV.A ON/OFF Liquid Line Solenoid A LSV.B ON/OFF Liquid Line Solenoid B

RMT.A ON/OFF Remote Alarm Relay

CIRCUIT A COMPRESSOR TEST

CC.A1 ON/OFF Compressor A1 Relay

UL.TM xx Comp A1 Unload Time

CC.A2 ON/OFF Compressor A2 Relay CC.A3 ON/OFF Compressor A3 Relay

MLV ON/OFF Minimum Load Valve Relay

CIRCUIT B COMPRESSOR TEST CC.B1 ON/OFF Compressor B1 Relay CC.B2 ON/OFF Compressor B2 Relay CC.B3 ON/OFF Compressor B3 Relay

Enable/Off/Remote contact switch to

OFF. Change TEST to ON.

Move switch to ENABLE

68

APPENDIX A — DISPLAY TABLES (cont)

Temperature Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

ENTERING AND LEAVING UNIT TEMPERATURES

RAT xxx.x °F Return Air Temperature

UNIT

CIR.A

CIR.B

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

PRC.A

PRC.B

SAT xxx.x °F Supply Air Temperature OAT xxx.x °F Outside Air Temperature

SPT xxx.x °F Space Temperature

SCT.D xxx.x ΔF Circuit SCT Difference

TEMPERATURES CIRCUIT A SCT.A xxx.x °F Saturated Condensing Tmp SST.A xxx.x °F Saturated Suction Temp

RGT.A xxx.x °F Compr Return Gas Temp D.GAS xxx.x °F Discharge Gas Temp

SH.A xxx.x ΔF Suction Superheat Temp

TEMPERATURES CIRCUIT B SCT.B xxx.x °F Saturated Condensing Tmp SST.B xxx.x °F Saturated Suction Temp

RGT.B xxx.x °F Compr Return Gas Temp

SH.B xxx.x ΔF Suction Superheat Temp

Pressures Mode and Sub-Mode Directory

PRESSURES CIRCUIT A DP.A XXX.XPSIG Discharge Pressure SP.A XXX.XPSIG Suction Pressure

PRESSURES CIRCUIT B DP.B XXX.XPSIG Discharge Pressure SP.B XXX.XPSIG Suction Pressure

Set Points Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION RANGE COMMENT

COOLING SET POINTS CSP.1 xxx.x °F Cooling Set Point 1 40 to 80 Default: 55 F CSP.2 xxx.x °F Cooling Set Point 2 40 to 80 Default: 50 F

SPS.P xxx.x °F Space T Cool Set Point 65 to 80 Default: 78 F

COOL

HEAD

SPT.O xx.x ΔF Space Temperature Offset STP.O xxx.x °F Space T SP Plus Offset P.CAP XXX Percent CAP Requested LCON xx.x ΔF Lo Cool On Set Point –1 to 2 Default: 1

HCON xx.x ΔF HI Cool On Set Point 0.5 to 20 Default: 3

LCOF xx.x ΔF Lo Cool Off Set Point 0.5 to 2 Default: 0.5

HEAD PRESSURE SET POINTS

H.SP xxx.x °F Head Set Point ON 85 to 120 Default: 110 F

HSPF xxx.x °F Head Set Point OFF 45 to 90 Default: 72 F

F.ON xxx.x °F Fan On Set Point

F.OFF xxx.x °F Fan Off Set Point

F.DLT XX.X Fan Stage Delta 0 to 50

F.TME XXX Fan Delta Active Time 0 to 300

69

APPENDIX A — DISPLAY TABLES (cont)

Inputs Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

GENERAL INPUTS

STST ON/OFF Start/Stop Switch

IDFA ON/OFF Indoor Fan Status-CIRA

Y.1 ON/OFF Y1 Thermostat Input

GEN.I

CRCT

4-20

Y.2 ON/OFF Y2 Thermostat Input

IDFB ON/OFF Indoor Fan Status-CIRB

Y.3 ON/OFF Y3 Thermostat Input

Y.4 ON/OFF Y4 Thermostat Input DLS1 ON/OFF Demand Limit Switch 1 DLS2 ON/OFF Demand Limit Switch 2

CIRCUIT INPUTS FKA1 ON/OFF Compressor A1 Feedback FKA2 ON/OFF Compressor A2 Feedback FKA3 ON/OFF Compressor A3 Feedback

HPSA ON/OFF High Pressure Switch A

FKB1 ON/OFF Compressor B1 Feedback FKB2 ON/OFF Compressor B2 Feedback FKB3 ON/OFF Compressor B3 Feedback

HPSB ON/OFF High Pressure Switch B

4-20 MA INPUTS

DMND XX.X 4-20 ma Demand Signal

RSET XX.X 4-20 ma Reset Signal

CL.MA XX.X 4-20 Cooling Demand

Outputs Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

GENERAL OUTPUTS FAN1 ON/OFF Fan 1 Relay FAN2 ON/OFF Fan 2 Relay FAN3 ON/OFF Fan 3 Relay

GEN.O

CIR.A

CIR.B

FAN4 ON/OFF Fan 4 Relay FAN5 ON/OFF Fan 5 Relay

MLV.R ON/OFF Minimum Load Valve Relay

V.HPA XXX Var Head Press Out Cir A

V.HPB XXX Var Head Press Out Cir B

OUTPUTS CIRCUIT A

CC.A1 ON/OFF Compressor A1 Relay

DPE.R XXX Comp A1 Load Percent

D.SOL ON/OFF Digital Scroll Solenoid CC.A2 ON/OFF Compressor A2 Relay CC.A3 ON/OFF Compressor A3 Relay

LSV.A ON/OFF Liquid Line Solenoid A

OUTPUTS CIRCUIT B CC.B1 ON/OFF Compressor B1 Relay CC.B2 ON/OFF Compressor B2 Relay CC.B3 ON/OFF Compressor B3 Relay

LSV.B ON/OFF Liquid Line Solenoid B

70

APPENDIX A — DISPLAY TABLES (cont)

Configuration Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

DISPLAY CONFIGURATION

TEST ON/OFF Test Display LEDs

METR ON/OFF Metric Display Off = English On = Metric

Default: 0

DISP

UNIT

CCN

OPT1

OPT2

LANG X Language Selection

PAS.E ENBL/DSBL Password Enable

PASS XXXX Service Password

UNIT CONFIGURATION

SIZE Unit Size NCKT X Number of Refrigerant Circuits SZ.A1 XX Compressor A1 Size SZ.A2 XX Compressor A2 Size SZ.A3 XX Compressor A3 Size SZ.B1 XX Compressor B1 Size SZ.B2 XX Compressor B2 Size SZ.B3 XX Compressor B3 Size FAN.S XX Fan Sequence Number A1.TY YES/NO Compressor A1 Digital

MAX.T XX Maximum A1 Unload Time

CCN NETWORK CONFIGS

CCNA XXX CCN Address

CCNB XXX CCN Bus Number

BAUD X CCN Baud Rate

UNIT OPTIONS 1 HARDWARE

MLV.S YES/NO Minimum Load Valve Select

CSB.E ENBL/DSBL CSB Boards Enable

SPT.S ENBL/DSBL Space Temp Sensor SPOS ENBL/DSBL Space Temp Offset Enable SPOR XX Space Temp Offset Range 1 to 10

RAT.T X RAT Thermistor Type

SAT.T X SAT Thermistor Type

EMM YES/NO EMM Module installed

UNIT OPTIONS 2 CONTROLS

C.TYP X Machine Control Type

CTRL X Control Method

LOAD X Loading Sequence Select

LLCS X Lead/Lag Circuit Select

DELY XX Minutes Off Time

0 = Enable/Off/Remote Switch

0 = English

1 = Espanol

2 = Francais

3 = Portuguese

Default: 1

Range: 0 to 239

Default: 1

Range: 0 to 239

Default: 3

1 = 2400 2 = 4800

3 = 9600 4 =19,200 5 =38,400

Default: 0 0 = 5 K

1 = 10 K

2 = None Default: 0

0 = 5 K

1 = 10 K

2 = None

Default: 4

1 = VAV

2 = Invalid

3 = TSTAT MULTI 4 = TSTAT 2 STG

5 = SPT MULTI

6 = Invalid

7 = PCT CAP

8 = DUAL TSTAT

9 = VAV SETPOINT

Default: 0

1 = Occupancy

2 = CCN Control

Default: 1 1 = Equal

2 = Staged

Default: 1

1 = Automatic 2 = Circuit A Leads 3 = Circuit B Leads

Default: 0

Range: 0 to 15 Minutes

71

APPENDIX A — DISPLAY TABLES (cont)

Configuration Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

MOTORMASTER

MMR.S YES/NO Motormaster Select

Default: 1

Range: 1 to 4

Default: 0.1

Range: -20 to 20

Default: 0.0

Range: -20 to 20

Default: 0

0 = No Reset

1 = 4 to 20 mA Input

3 = Return Temperature

4 = Space Temperature

Default: 0.0 ΔF

Range: -30 to 30 ΔF

Default: 125 F

Range: 0º to125 F

Default: 0 F

Range: 0º to125 F

Default: 0.0 ΔF

Range: -30 to 30 ΔF

Default: 10.0 ΔF

Range: 0º to125 F

Default: 0 ΔF

Range: 0º to125 F

Default: 0.0 ΔF

Range: -30 to 30 ΔF

Default: 0

0 = None

1 = Switch

2 - 4 to 20 mA Input

3 = CCN Loadshed

Default: 100%

Range: 0 to 100%

Default: 0

Range: 0 to 99

Default: 0%

Range: 0 to 60%

Default: 60 minutes

Range: 0 to 120 minutes

Default: 80%

Range: 0 to 100%

Default: 50%

Range: 0 to 100%

Default: 1.0

Range: 0.3 to 2

Default: 1

Range: 1 to 99

Default: 1

Range: 1 to 4

M.MST

RSET

SLCT

SERV

BCST

P.GAN XX Head Pressure P Gain

I.GAN XX.X Head Pressure I Gain

D.GAN XX.X Head Pressure D Gain

MIN.S XX Minimum Fan Speed

RESET COOL TEMP

CRST X Cooling Reset Type

MA.DG XX.XΔF 4-20 - Degrees Reset

RM.NO XXX.X °F Remote - No Reset Temp

RM.F XXX.X °F Remote - Full Reset Temp

RM.DG XX.X °F Remote - Degrees Reset

RT.NO XXX.XΔF Return - No Reset Temp

RT.F XXX.XΔF Return - Full Reset Temp

RT.DG XX.X °F Return - Degrees Reset

DMDC X Demand Limit Select

DM20 XXX% Demand Limit at 20 mA

SHNM XXX Loadshed Group Number

SHDL XXX% Loadshed Demand Delta

SHTM XXX Maximum Loadshed Time

DLS1 XXX% Demand Limit Switch 1

DLS2 XXX% Demand Limit Switch 2

SETPOINT AND RAMP LOAD

RL.S ENBL/DSBL Ramp Load Select Default: Enable

CRMP ENBL/DSBL Cooling Ramp Loading

SCHD XX Schedule Number

Z.GN X.X Deadband Multiplier

SERVICE CONFIGURATION EN.A1 YES/NO Enable Compressor A1 EN.A2 YES/NO Enable Compressor A2 EN.A3 YES/NO Enable Compressor A3 EN.B1 YES/NO Enable Compressor B1 EN.B2 YES/NO Enable Compressor B2 EN.B3 YES/NO Enable Compressor B3 EN.FB YES/NO Enable Compressor FBack REV.R YES/NO Reverse Rotation Enable

BROADCAST CONFIGURATION

T.D.B ON/OFF CCN Time/Date Broadcast OAT.B ON/OFF CCN OAT Broadcast G.S.B ON/OFF Global Schedule Broadcst

BC.AK ON/OFF CCN Broadcast Ack'er

2 = Outdoor Air Temperature

72

APPENDIX A — DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

TIME

DATE

DST

HOL.L LOCAL HOLIDAY SCHEDULES

HD.01

HD.02

HD.03

HD.04

HD.05

HD.06

HD.07

HD.08

HH.MM XX.XX Hour and Minute Military (00:00 - 23:59)

MONTH, DATE, DAY, AND YEAR

MNTH XX Month of Year

DOM XX Day of Month Range: 01 -31

DAY X Day of Week

YEAR XXXX Year of Century

STR.M XX Month Default: 4 Range 1- 12

STR.W X Week Default: 1 Range 1- 5

STR.D X Day Default: 7 Range 1- 7 MIN.A XX Minutes to Add Default: 60 Range 0 - 99 STP.M XX Month Default: 10 Range 1- 12 STP.W XX Week Default: 5 Range 1- 5 STP.D XX Day Default: 7 Range 1- 7 MIN.S XX Minutes to Subtract Default: 60 Range 0 - 99

MON XX Holiday Start Month

DAY XX Start Day LEN XX Duration (days)

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

TIME OF DAY

DAYLIGHT SAVINGS TIME

HOLIDAY SCHEDULE 01

HOLIDAY SCHEDULE 02

HOLIDAY SCHEDULE 03

HOLIDAY SCHEDULE 04

HOLIDAY SCHEDULE 05

HOLIDAY SCHEDULE 06

HOLIDAY SCHEDULE 07

HOLIDAY SCHEDULE 08

1 - 12 (1 = January,

2 = February, etc.)

1 - 7 (1 = Sunday,

2 = Monday, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

73

APPENDIX A — DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

HOLIDAY SCHEDULE 09

HD.09

HD.10

HD.11

HD.12

HD.13

HD.14

HD.15

HD.16

HD.17

HD.18

HD.19

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 10

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 11

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 12

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 13

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 14

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 15

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 16

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 17

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 18

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

HOLIDAY SCHEDULE 19

MON XX Holiday Start Month

DAY XX Start Day 01-31

LEN XX Duration (days)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

74

APPENDIX A — DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

HOLIDAY SCHEDULE 20

HD.20

HD.21

HD.22

HD.23

HD.24

HD.25

HD.26

HD.27

HD.28

HD.29

HD.30

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 21

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 22

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 23

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 24

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 25

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 26

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 27

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 28

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 29

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

HOLIDAY SCHEDULE 30

MON XX Holiday Start Month

DAY XX Start Day 01-31 LEN XX Duration (days)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

1 - 12 (1 = January,

2 = February, etc.)

75

APPENDIX A — DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

SCH.N Schedule Number 0 SCH.L LOCAL OCCUPANCY SCHEDULE

OCCUPANCY PERIOD 1 OCC.1 XX:XX Period Occupied Time Military (00:00 - 23:59) UNC.1 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.1 YES/NO Monday In Period

TUE.1 YES/NO Tuesday In Period

PER.1

PER.2

PER.3

PER.4

PER.5

WED.1 YES/NO Wednesday In Period

THU.1 YES/NO Thursday In Period

FRI.1 YES/NO Friday In Period

SAT.1 YES/NO Saturday In Period SUN.1 YES/NO Sunday In Period HOL.1 YES/NO Holiday In Period

OCCUPANCY PERIOD 2 OCC.2 XX:XX Period Occupied Time Military (00:00 - 23:59) UNC.2 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.2 YES/NO Monday In Period

TUE.2 YES/NO Tuesday In Period

WED.2 YES/NO Wednesday In Period

THU.2 YES/NO Thursday In Period

FRI.2 YES/NO Friday In Period

SAT.2 YES/NO Saturday In Period SUN.2 YES/NO Sunday In Period HOL.2 YES/NO Holiday In Period

OCCUPANCY PERIOD 3 OCC.3 XX:XX Period Occupied Time Military (00:00 - 23:59) UNC.3 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.3 YES/NO Monday In Period

TUE.3 YES/NO Tuesday In Period

WED.3 YES/NO Wednesday In Period

THU.3 YES/NO Thursday In Period

FRI.3 YES/NO Friday In Period

SAT.3 YES/NO Saturday In Period SUN.3 YES/NO Sunday In Period HOL.3 YES/NO Holiday In Period

OCCUPANCY PERIOD 4 OCC.4 XX:XX Period Occupied Time Military (00:00 - 23:59) UNC.4 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.4 YES/NO Monday In Period

TUE.4 YES/NO Tuesday In Period

WED.4 YES/NO Wednesday In Period

THU.4 YES/NO Thursday In Period

FRI.4 YES/NO Friday In Period

SAT.4 YES/NO Saturday In Period SUN.4 YES/NO Sunday In Period HOL.4 YES/NO Holiday In Period

OCCUPANCY PERIOD 5 OCC.5 XX:XX Period Occupied Time Military (00:00 - 23:59) UNC.5 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.5 YES/NO Monday In Period

TUE.5 YES/NO Tuesday In Period WED.5 YES/NO Wednesday In Period THU.5 YES/NO Thursday In Period

FRI.5 YES/NO Friday In Period

SAT.5 YES/NO Saturday In Period SUN.5 YES/NO Sunday In Period HOL.5 YES/NO Holiday In Period

76

APPENDIX A — DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

OCCUPANCY PERIOD 6

OCC.6 XX:XX Period Occupied Time Military (00:00 - 23:59)

UNC.6 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.6 YES/NO Monday In Period

TUE.6 YES/NO Tuesday In Period

PER.6

PER.7

PER.8

OVR

WED.6 YES/NO Wednesday In Period

THU.6 YES/NO Thursday In Period

FRI.6 YES/NO Friday In Period

SAT.6 YES/NO Saturday In Period SUN.6 YES/NO Sunday In Period HOL.6 YES/NO Holiday In Period

OCCUPANCY PERIOD 7

OCC.7 XX:XX Period Occupied Time Military (00:00 - 23:59)

UNC.7 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.7 YES/NO Monday In Period

TUE.7 YES/NO Tuesday In Period

WED.7 YES/NO Wednesday In Period

THU.7 YES/NO Thursday In Period

FRI.7 YES/NO Friday In Period

SAT.7 YES/NO Saturday In Period SUN.7 YES/NO Sunday In Period HOL.7 YES/NO Holiday In Period

OCCUPANCY PERIOD 8

OCC.8 XX:XX Period Occupied Time Military (00:00 - 23:59)

UNC.8 XX:XX Period Unoccupied Time Military (00:00 - 23:59)

MON.8 YES/NO Monday In Period

TUE.8 YES/NO Tuesday In Period

WED.8 YES/NO Wednesday In Period

THU.8 YES/NO Thursday In Period

FRI.8 YES/NO Friday In Period

SAT.8 YES/NO Saturday In Period SUN.8 YES/NO Sunday In Period HOL.8 YES/NO Holiday In Period

SCHEDULE OVERRIDE OVR.T X Timed Override Hours Default: 0 Range 0-4 hours OVR.L X Override Time Limit Default: 0 Range 0-4 hours SPT.O XX.X Space Temperature Offset T.OVR YES/NO Timed Override User Entry

77

APPENDIX A — DISPLAY TABLES (cont)

Operating Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

MODES CONTROLLING UNIT MD05 ON/OFF Ramp Load Limited MD06 ON/OFF Timed Override in effect MD09 ON/OFF Slow Change Override MD10 ON/OFF Minimum OFF time active MD14 ON/OFF Temperature Reset

MODE

TSKS

MD15 ON/OFF Demand Limited MD17 ON/OFF Low Temperature Cooling MD18 ON/OFF High Temperature Cooling

MDTG ON/OFF Time Guard Active

MD21 ON/OFF High SCT Circuit A MD22 ON/OFF High SCT Circuit B MD23 ON/OFF Minimum Comp. On Time MD25 ON/OFF Low Sound Mode

TASK STATES

TKCA X Circuit A State

TKCB X Circuit B State

TKFA X Circuit A Fan State

TKFB X Circuit B Fan State

0 = OFF

1 = ALLOW TO RUN

2 = PRE START

3 = STARTING

4 = RUNNING

5 = STOPPING

0 = OFF

1 = ALLOW TO RUN

2 = PRE START

3 = STARTING

4 = RUNNING

5 = STOPPING

1 = PRE-START DETERMINATION

0 = OFF

2 = PRE START

3 = NORMAL

4 = STOPPING

0 = OFF

2 = PRE START

3 = NORMAL

4 = STOPPING

Alarms Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

CURRENTLY ACTIVE ALARMS

CRNT

RCRN YES/NO Reset All Current Alarms

HIST

AXXX TXXX PXXX

Current Alarms 1-25

ALARM HISTORY

Alarm History 1-20

Alarms are hown as AXXX

Alerts are shown as TXXX

Alarms are shown as AXXX

Alerts are shown as TXXX

78

APPENDIX B — CCN TABLES

Status Tables

DESCRIPTION VALUE UNITS POINT NAME

TSTAT_IN (Thermostat Input)

Indoor Fan Status-CIRA Off/On IDFA_FS

Y1 Thermostat Input Off/On Y1 Y2 Thermostat Input Off/On Y2

Indoor Fan Status-CIRB Off/On IDFB_FS

Y3 Thermostat Input Off/On Y3 Y4 Thermostat Input Off/On Y4

A_UNIT (General Unit Parameters)

Control Mode 10-char ASCII STAT

Space Temp Control Mode N SPTMODE

Occupied No/Yes OCC CCN Chiller stop/start CHIL_S_S Alarm State 6-char ASCII ALM

4-20 Cooling Demand NN.n milliAmps COOL_MA

Active Demand Limit NNN % DEM_LIM

Override Modes in Effect No/Yes MODE

Percent Total Capacity NNN % CAP_T

Requested Stage NN STAGE

Active Set Point NNN.n degF SP

Control Point NNN.n degF CTRL_PNT Return Air Temperature NNN.n degF RETURN_T Supply Air Temperature NNN.n degF SUPPLY_T

Emergency Stop Enable/EMStop EMSTOP

Minutes Left for Start 5-char ASCII MIN_LEFT

CIRCA_AN (Circuit A Analog Parameters)

Percent Total Capacity NNN % CAPA_T

Percent Available Capacity NNN % CAPA_A

Discharge Pressure NNN.n PSIG DP_A

Suction Pressure NNN.n PSIG SP_A

Head Set Point ON NNN.n degF HSP_ON

Head Set Point OFF NNN.n degF HSP_OFF

Saturated Condensing Temperature NNN.n degF SCTA

Saturated Suction Temperature NNN.n degF SSTA

Variable Head Press Out Circuit A NNN.n % VHPA_ACT

Compressor Return Gas Temperature NNN.n degF RGTA

Discharge Gas Temperature NNN.n degF DIGCMPDT

Suction Superheat Temperature NNN.n deltaF SH_A

CIRCADIO (Circuit A Discrete Inputs/Outputs)

CIRC.A DISCRETE OUTPUTS

Compressor A1 Relay Off/On K_A1_RLY

Comp A1 Load Percent NNN.n % DIGITAL%

Compressor A2 Relay Off/On K_A2_RLY Compressor A3 Relay Off/On K_A3_RLY

Minimum Load Valve Relay Off/On MLV_RLY

Liquid Line Solenoid A Off/On LLSV_A

CIRC.A DISCRETE INPUTS

Compressor A1 Feedback Off/On K_A1_FBK Compressor A2 Feedback Off/On K_A2_FBK Compressor A3 Feedback Off/On K_A3_FBK

High Pressure Switch A Open/Close HPSA

79

APPENDIX B — CCN TABLES (cont)

Status Tables (cont)

DESCRIPTION VALUE UNITS POINT NAME

CIRCB_AN (Circuit B Analog Parameters)

Percent Total Capacity NNN % CAPB_T

Percent Available Capacity NNN % CAPB_A

Discharge Pressure NNN.n PSIG DP_B

Suction Pressure NNN.n PSIG SP_B

Saturated Condensing Temperature NNN.n degF SCTB

Saturated Suction Temperature NNN.n degF SSTB

Variable Head Press Out Circuit B NNN.n % VHPB_ACT

Compressor Return Gas Temperature NNN.n degF RGTB

Suction Superheat Temperature NNN.n deltaF SH_B

CIRCBDIO (Circuit B Discrete Inputs/Outputs)

CIRC.B DISCRETE OUTPUTS

Compressor B1 Relay Off/On K_B1_RLY Compressor B2 Relay Off/On K_B2_RLY Compressor B3 Relay Off/On K_B3_RLY

Minimum Load Valve Relay Off/On MLV_RLY

Liquid Line Solenoid B Off/On LLSV_B

CIRC.B DISCRETE INPUTS

Compressor B1 Feedback Off/On K_B1_FBK Compressor B2 Feedback Off/On K_B2_FBK Compressor B3 Feedback Off/On K_B3_FBK

High Pressure Switch B Open/Close HPSB

OPTIONS (Unit Parameters)

FAN S Fan Stage Circuit A NNN FANSTGEA Fan Stage Circuit B NNN FANSTGEB

Fan 1 Relay Off/On FAN_1 Fan 2 Relay Off/On FAN_2 Fan 3 Relay Off/On FAN_3 Fan 4 Relay Off/On FAN_4 Fan 5 Relay Off/On FAN_5

UNIT ANALOG VALUES

Return Air Temperature NNN.n degF RETURN_T Supply Air Temperature NNN.n degF SUPPLY_T

Circuit SCT Difference NNN.n deltaF SCTDELTA

TEMPERATURE RESET

4-20 ma Reset Signal NN.n milliAmps RST_MA

Outside Air Temperature NNN.n degF OAT

Space Temperature NNN.n degF SPT

DEMAND LIMIT

4-20 ma Demand Signal NN.n milliAmps LMT_MA

Demand Limit Switch 1 Off/On DMD_SW1 Demand Limit Switch 2 Off/On DMD_SW2

CCN Loadshed Signal N DL_STAT

MISCELLANEOUS

Supply Air Set Point NNN.n degF SAT_SP

80

APPENDIX B — CCN TABLES (cont)

CCN Configuration Tables

DESCRIPTION VALUE UNITS POINT NAME

UNIT (Unit Configuration)

Unit Size NNN tons SIZE

Number of Refrig Ckts N NUMCKTS

Compressor A1 Size NNN tons SIZE_A1 Compressor A2 Size NNN tons SIZE_A2 Compressor A3 Size NNN tons SIZE_A3 Compressor B1 Size NNN tons SIZE_B1 Compressor B2 Size NNN tons SIZE_B2 Compressor B3 Size NNN tons SIZE_B3

Fan Sequence Number N FAN_TYPE

Compressor A1 Digital No/Yes CPA1TYPE

Maximum A1 Unload Time NN secs MAXULTME

OPTIONS1 (Options 1 Configuration)

Motormaster Select No/Yes MM_SLCT

Minimum Load Valve Select No/Yes MLV_FLG

CSB Boards Enable Disable/Enable CSB_ENA

Space Temperature Sensor Disable/Enable SPTSENS Space Temperature Offset Enable Disable/Enable SPTOSENS Space Temperature Offset Range NN deltaF SPTO_RNG

RAT Thermistor Type N RATTYPE SAT Thermistor Type N SATTYPE

EMM Module Installed No/Yes EMM_BRD

OPTIONS2 (Options 2 Configuration)

Machine Control Type N CTRLTYPE

Control Method N CONTROL

Loading Sequence Select N SEQ_TYPE

Lead/Lag Circuit Select N LEAD_TYP

Ramp Load Select Disable/Enable RAMP_EBL

Minutes Off Time NN mins DELAY

Deadband Multiplier N.n Z_GAIN

SCHEDOVR (Timed Override Set Up)

Schedule Number NN SCHEDNUM

Override Time Limit N hours OTL

Timed Override Hours N hours OVR_EXT

Timed Override No/Yes TIMEOVER

RESETCON (Temperature Reset and Demand Limit)

COOLING RESET

Cooling Reset Type N CRST_TYP

4-20 MA RESET

4-20 - Degrees Reset NNN.n deltaF 420_DEG

REMOTE RESET

Remote - No Reset Temperature NNN.n degF REM_NO

Remote - Full Reset Temperature NNN.n degF REM_FULL

Remote - Degrees Reset NNN.n deltaF REM_DEG

RETURN TEMPERATURE RESET

Return - No Reset Temperature NNN.n deltaF RTN_NO

Return - Full Reset Temperature NNN.n deltaF RTN_FULL

Return - Degrees Reset NNN.n deltaF RTN_DEG

DEMAND LIMIT

Demand Limit Select N DMD_CTRL

Demand Limit at 20 mA NNN % DMT20MA Loadshed Group Number NN SHED_NUM Loadshed Demand Delta NN % SHED_DEL

Maximum Loadshed Time NNN mins SHED_TIM

Demand Limit Switch 1 NNN % DLSWSP1 Demand Limit Switch 2 NNN % DLSWSP2

81

APPENDIX B — CCN TABLES (cont)

CCN Configuration Tables (cont)

DESCRIPTION VALUE UNITS POINT NAME

DISPLAY (Marquee Display Set Up)

Service Password NNNN PASSWORD

Password Enable Disable/Enable PASS_EBL

Metric Display Off/On DISPUNIT

Language Selection N LANGUAGE

HPA (Head Pressure)

SCT Delta for Compressor A1 NNN.n deltaF A1SCTDT SCT Delta for Compressor A2 NNN.n deltaF A2SCTDT

HPB (Head Pressure)

SCT Delta for Comp B1 NNN.n deltaF B1SCTDT SCT Delta for Comp B2 NNN.n deltaF B2SCTDT

SERVICE

Enable Compressor A1 Disable/Enable ENABLEA1 Enable Compressor A2 Disable/Enable ENABLEA2 Enable Compressor A3 Disable/Enable ENABLEA3 Enable Compressor B1 Disable/Enable ENABLEB1 Enable Compressor B2 Disable/Enable ENABLEB2 Enable Compressor B3 Disable/Enable ENABLEB3

SET POINT

COOLING Cooling Set Point 1 NNN.n degF CSP1 Cooling Set Point 2 NNN.n degF CSP2

Space T Cool Set Point NNN.n degF SPT_SP

Space Temperature Offset NN.n deltaF SPTO

Space T SP Plus Offset NN.n degF SPSP_PO

Lo Cool On Set Point NN.n deltaF DMDLCON HI Cool On Set Point NN.n deltaF DMDHCON Lo Cool Off Set Point NN.n deltaF DMDLCOFF

RAMP LOADING

Cooling Ramp Loading N.n CRAMP

Head Set Point ON NNN.n degF HSP_ON

Head Set Point OFF NNN.n degF HSP_OFF

Fan On Set Point NNN.n degF FANONSP Fan Off Set Point NNN.n degF FANOFFSP

Fan Stage Delta NNN.n deltaF FSTGDLTA

Fan Delta Active Time NNN secs FANDLTTM

Unload Time Threshold NN secs UTTHRESH

CCN Maintenance Tables

DESCRIPTION VALUE UNITS POINT NAME

STRTHOUR (Maintenance Display)

Machine Operating Hours NNNNNN hours HR_MACH

Machine Starts NNNNNN CY_MACH

Circuit A Run Hours NNNNNN hours HR_CIRA Compressor A1 Run Hours NNNNNN.n hours HR_A1 Compressor A2 Run Hours NNNNNN.n hours HR_A2 Compressor A3 Run Hours NNNNNN.n hours HR_A3

Circuit B Run Hours NNNNNN hours HR_CIRB Compressor B1 Run Hours NNNNNN.n hours HR_B1 Compressor B2 Run Hours NNNNNN.n hours HR_B2 Compressor B3 Run Hours NNNNNN.n hours HR_B3

Circuit A Starts NNNNNN CY_CIRA Compressor A1 Starts NNNNNN CY_A1 Compressor A2 Starts NNNNNN CY_A2 Compressor A3 Starts NNNNNN CY_A3

Circuit B Starts NNNNNN CY_CIRB Compressor B1 Starts NNNNNN CY_B1 Compressor B2 Starts NNNNNN CY_B2 Compressor B3 Starts NNNNNN CY_B3

82

APPENDIX B — CCN TABLES (cont)

CCN Maintenance Tables (cont)

DESCRIPTION VALUE UNITS POINT NAME

CURRMODS (Maintenance Display)

Ramp Load Limited Off/On MODE_5

Timed Override in effect Off/On MODE_6

Slow Change Override Off/On MODE_9

Minimum OFF time active Off/On MODE_10

Temperature Reset Off/On MODE_14

Demand Limited Off/On MODE_15 Low Temperature Cooling Off/On MODE_17 High Temperature Cooling Off/On MODE_18

High SCT Circuit A Off/On MODE_21 High SCT Circuit B Off/On MODE_22

Minimum Comp. On Time Off/On MODE_23

Low Sound Mode Off/On MODE_25

Time Guard Active Off/On MODE_TG

Alarms (Maintenance Display)

Active Alarm #1 4-char ASCII ALARM01C Active Alarm #2 4-char ASCII ALARM02C Active Alarm #3 4-char ASCII ALARM03C Active Alarm #4 4-char ASCII ALARM04C Active Alarm #5 4-char ASCII ALARM05C Active Alarm #6 4-char ASCII ALARM06C Active Alarm #7 4-char ASCII ALARM07C Active Alarm #8 4-char ASCII ALARM08C

Active Alarm #9 4-char ASCII ALARM09C Active Alarm #10 4-char ASCII ALARM10C Active Alarm #11 4-char ASCII ALARM11C Active Alarm #12 4-char ASCII ALARM12C Active Alarm #13 4-char ASCII ALARM13C Active Alarm #14 4-char ASCII ALARM14C Active Alarm #15 4-char ASCII ALARM15C Active Alarm #16 4-char ASCII ALARM16C Active Alarm #17 4-char ASCII ALARM17C Active Alarm #18 4-char ASCII ALARM18C Active Alarm #19 4-char ASCII ALARM19C Active Alarm #20 4-char ASCII ALARM20C Active Alarm #21 4-char ASCII ALARM21C Active Alarm #22 4-char ASCII ALARM22C Active Alarm #23 4-char ASCII ALARM23C Active Alarm #24 4-char ASCII ALARM24C Active Alarm #25 4-char ASCII ALARM25C

Versions (Software Versions)

MBB CESR131279- 5-char ASCII

AUX CESR131333- 5-char ASCII CXB CESR131173- 5-char ASCII

EMM CESR131174- 5-char ASCII

MARQUEE CESR131171- 5-char ASCII

NAVIGATOR CESR130227- 5-char ASCII

LOADFACT (Maintenance Display)

Load/Unload Factor NNN SMZ

Control Point NNN.n degF CTRL_PNT Return Air Temperature NNN.n degF RETURN_T Supply Air Temperature NNN.n degF SUPPLY_T

Ramp Load Limited Off/On MODE_5

Slow Change Override Off/On MODE_9 Low Temperature Cooling Off/On MODE_17 High Temperature Cooling Off/On MODE_18

Minimum Comp. On Time Off/On MODE_23

LEARNFNS (Maintenance Display)

SCT Delta for Comp A1 NNN.n deltaF A1SCTDT SCT Delta for Comp A2 NNN.n deltaF A2SCTDT SCT Delta for Comp B1 NNN.n deltaF B1SCTDT SCT Delta for Comp B2 NNN.n deltaF B2SCTDT

83

DESCRIPTION VALUE UNITS POINT NAME

PM-COIL (Maintenance Display)

Coil Cleaning Srvc Inter NNNNN hours SI_COIL

Coil Service Countdown NNNNN hours CL_CDOWN

Coil Cleaning Maint.Done No/Yes CL_MAINT

Coil Cleaning Maint.Date 15-char ASCII COIL_PM0 Coil Cleaning Maint.Date 15-char ASCII COIL_PM1 Coil Cleaning Maint.Date 15-char ASCII COIL_PM2 Coil Cleaning Maint.Date 15-char ASCII COIL_PM3 Coil Cleaning Maint.Date 15-char ASCII COIL_PM4

TESTMODE (Maintenance Display)

Service Test Mode Off/On NET_CTRL Compressor A1 Relay Off/On S_A1_RLY Compressor A2 Relay Off/On S_A2_RLY Compressor A3 Relay Off/On S_A3_RLY Compressor B1 Relay Off/On S_B1_RLY Compressor B2 Relay Off/On S_B2_RLY Compressor B3 Relay Off/On S_B3_RLY

Fan 1 Relay Off/On S_FAN_1 Fan 2 Relay Off/On S_FAN_2 Fan 3 Relay Off/On S_FAN_3 Fan 4 Relay Off/On S_FAN_4

Fan 5 Relay Off/On S_FAN_5 Liquid Line Solenoid A Off/On S_LLSV_A Liquid Line Solenoid B Off/On S_LLSV_B

Comp A1 Unload Time NN secs S_A1ULTM

Minimum Load Valve Relay Off/On S_MLV

Remote Alarm Relay Off/On S_ALM

RUNTEST (Maintenance Display)

Percent Total Capacity NNN % CAPA_T

Percent Available Capacity NNN % CAPA_A

Discharge Pressure NNN.n PSIG DP_A

Suction Pressure NNN.n PSIG SP_A

Head Set Point ON NNN.n degF HSP_ON

Head Set Point OFF NNN.n degF HSP_OFF

Saturated Condensing Temperature NNN.n degF SCTA

Saturated Suction Temperature NNN.n degF SSTA

Compr Return Gas Temperature NNN.n degF RGTA

Discharge Gas Temperature NNN.n degF DIGCMPDT

Suction Superheat Temperature NNN.n deltaF SH_A

Compressor A1 Relay Off/On K_A1_RLY Compressor A2 Relay Off/On K_A2_RLY Compressor A3 Relay Off/On K_A3_RLY

Minimum Load Valve Relay Off/On MLV_RLY

Compressor A1 Feedback Off/On K_A1_FBK Compressor A2 Feedback Off/On K_A2_FBK Compressor A3 Feedback Off/On K_A3_FBK

Percent Total Capacity NNN % CAPB_T

Percent Available Capacity NNN % CAPB_A

Discharge Pressure NNN.n PSIG DP_B

Suction Pressure NNN.n PSIG SP_B

Head Set Point ON NNN.n degF HSP_ON

Head Set Point OFF NNN.n degF HSP_OFF

Saturated Condensing Temperature NNN.n degF SCTB

Saturated Suction Temperature NNN.n degF SSTB

Compr Return Gas Temperature NNN.n degF RGTB

Suction Superheat Temperature NNN.n deltaF SH_B

Compressor B1 Relay Off/On K_B1_RLY Compressor B2 Relay Off/On K_B2_RLY Compressor B3 Relay Off/On K_B3_RLY

Minimum Load Valve Relay Off/On MLV_RLY

APPENDIX B — CCN TABLES (cont)

CCN Maintenance Tables (cont)

84

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53380003-01 Printed in U.S.A. Form 38AP-1T Pg 86 210 11-09 Replaces: New

START-UP CHECKLIST FOR 38AP SPLIT SYSTEM CONDENSING UNIT

(Remove and use for Job File)

I. Project Information

JOB NAME ______________________________________________________________________________

ADDRESS _______________________________________________________________________________

CITY ____________________________________________ STATE _______________ ZIP______________

INSTALLING CONTRACTOR ________________________________________________________________

SALES OFFICE ___________________________________________________________________________

START-UP PERFORMED BY ________________________________________________________________

Design Information

CAPACITY OAT

SUPPLY AIR

TEMPERATURE

RETURN AIR

TEMPERATURE

COIL SIZE

(sq ft)

COIL

CIRCUITING

CFM

SUCTION LINE

DIAMETER

LIQUID LINE

DIAMETER

LINE LENGTH

DOUBLE RISER

(Y/N)

CV/VAV

CONTROL TYPE (1-9)

ELEVATION DELTA

BETWEEN

INDOOR/OUTDOOR

UNIT MODEL ______________________________ SERIAL ________________________________

II. Preliminary Equipment Check

IS THERE ANY PHYSICAL DAMAGE?  YES  NO

DESCRIPTION ____________________________________________________________________________

________________________________________________________________________________________

1. UNIT IS INSTALLED LEVEL AS PER THE INSTALLATION INSTRUCTIONS.

2. POWER SUPPLY AGREES WITH THE UNIT NAMEPLATE.

3. ELECTRICAL POWER WIRING IS INSTALLED PROPERLY.

4. UNIT IS PROPERLY GROUNDED.

5. ELECTRICAL CIRCUIT PROTECTION HAS BEEN SIZED AND INSTALLED PROPERLY.

6. ALL TERMINALS ARE TIGHT.

7. ALL PLUG ASSEMBLIES ARE TIGHT.

 YES  NO

8. ALL CABLES AND THERMISTORS HAVE BEEN INSPECTED FOR CROSSED WIRES.

9. ALL THERMISTORS ARE FULLY INSERTED INTO WELLS.

10. MOTORMASTER IS INSTALLED ON FAN 1.

11. SENSORS (RAT, SAT, SPT) FOR CONTROL TYPES 3, 4, AND 5 ARE INSTALLED.

12. LONG LINE OPTION KIT IS INSTALLED, IF NEED.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53380003-01 Printed in U.S.A. Form 38AP-1T Pg CL-1 210 11-09 Replaces: New

 YES  NO

Refrigeration System Check

1. ALL SERVICE VALVES ARE OPEN.

2. ONLY BLEED TXV(S) ARE INSTALLED.

3. ALL PIPING IS CONNECTED PROPERLY.

4. FILTER DRIERS AND SIGHT GLASSES ARE INSTALLED NEAR THE TXV(S).

5. THE SYSTEM HAS BEEN EVACUATED.

6. THE SYSTEM HAS BEEN CHARGED WITH THE APPROPRIATE INITIAL CHARGE.

7. EVAPORATOR FANS ARE TURNING IN THE CORRECT DIRECTION.

8. EVAPORATOR FAN STATUS SWITCH IS OPERATIONAL.

9. CRANKCASE HEATERS ARE OPERATIONAL AND HAVE BEEN ENERGIZED TO REMOVE ANY LIQUID FROM THE COMPRESSORS.

10. WATER HAS BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE.

11. THE PROPER FILTERS HAVE BEEN INSTALLED.

12. THE FAN AND MOTOR PULLEYS OF THE INDOOR FAN HAVE BEEN CHAECKED FOR PROPER ALIGNMENT

13. THE INDOOR FAN BELTS HAVE THE PROPER TENSION.

14. THE CORRECT FAN ROTATION ON BOTH INDOOR AND OUTDOOR UNITS HAS BEEND VERIFIED.

 YES  NO

15. THE LIQUID SOLENOID VALVES, IF INSTALLED, ARE NEAR THE EVAPORATOR.

16. THE PIPING HAS BEEN CHECKED FOR LEAKS WITH A LEAK DETECTOR.

 YES  NO

LOCATE, REPAIR, AND REPORT ANY LEAKS________________________________________________

17. OIL IS VISABLE APPROXIMATELY

OF THE COMPRESSOR.

1

/2 WAY IN THE SIGHT GLASS(ES)

 YES  NO

RECORD THE OIL LEVEL(S) ______________________________________________________________

III. Unit Start-Up

1. COMPRESSOR OIL LEVEL IS CORRECT.  YES  NO

2. VERIFY COMPRESSOR MOUNTING BOLT TORQUE IS 10-14 FT-LB. (13.5-18.9 N-M).

3. LEAK CHECK UNIT. LOCATE, REPAIR AND REPORT ANY REFRIGERANT LEAKS.

4. VOLTAGE IS WITHIN UNIT NAMEPLATE RANGE.

5. CONTROL TRANSFORMER PRIMARY CONNECTION SET FOR PROPER VOLTAGE.

6. CONTROL TRANSFORMER SECONDARY VOLTAGE =

7. CHECK VOLTAGE IMBALANCE: A-B

A-C B-C

v

AVERAGE VOLTAGE = (A-B + A-C + B-C)/3 MAXIMUM DEVIATION FROM AVERAGE VOLTAGE = VOLTAGE IMBALANCE = ____________% (MAX. DEVIATION/AVERAGE VOLTAGE) X 100 VOLTAGE IMBALANCE LESS THAN 2%. (DO NOT START UNIT IF VOLTAGE IMBALANCE IS GREATER THAN 2%. CONTACT LOCAL UTILITY FOR ASSISTANCE.)

 YES  NO

8. VERIFY EVAPORATOR FAN CFM.

 YES  NO

CL-2

Start and Operate Machine. Complete the Following:

1. COMPLETE COMPONENT TEST.

2. CHECK REFRIGERANT AND OIL CHARGE.

3. FINISH CHARGING ACCORDING TO THE CHARGING CHART PROVIDED.

4. RECORD COMPRESSOR MOTOR CURRENT.

5. RECORD CONFIGURATION SETTINGS.

6. RECORD OPERATING TEMPERATURES AND PRESSURES.

7. PROVIDE OPERATING INSTRUCTIONS TO OWNER’S PERSONNEL.

 YES  NO

Instruction Time ________ hours.

8. RECORD COMPRESSOR OIL LEVELS AFTER INITIAL RUN. ____________________________________

9. OIL LEVELS ARE STILL WITHIN SIGHT GLASS(ES).

 YES  NO

OPERATING DATA:

RECORD THE FOLLOWING INFORMATION FROM THE PRESSURES AND TEMPERATURES MODES WHEN MACHINE IS IN A STABLE OPERATING CONDITION:

PRESSURE/TEMPERATURE

CIRCUIT A CIRCUIT B

DISCHARGE PRESSURE DP.A DP.B

SUCTION PRESSURE SP.A SP.B

SATURATED CONDENSING TEMP SCT.A SCT.B

SATURATED SUCTION TEMP SST.A SST.B

LIQUID LINE TEMPERATURE*

LIQUID LINE PRESSURE

DISCHARGE LINE TEMPERATURE*

RETURN GAS TEMPERATURE RGT.A RGT.B

RETURN AIR TEMPERATURE* RAT

SUPPLY AIR TEMPERATURE* SAT

OUTDOOR-AIR TEMPERATURE OAT

CONTROL POINT CTPT

PERCENT TOTAL CAPACITY CAP.T

*Readings taken with a digital thermometer.

CL-3

Compressor Running Current — All readings taken at full load.

COMPRESSOR MOTOR CURRENT L1 L2 L3

COMPRESSOR A1

COMPRESSOR A2

COMPRESSOR A3

COMPRESSOR B1

COMPRESSOR B2

COMPRESSOR B3

CONDENSER FAN MOTOR CURRENT L1 L2 L3

FAN MOTOR 1

FAN MOTOR 2

FAN MOTOR 3

FAN MOTOR 4

FAN MOTOR 5

FAN MOTOR 6

L1 L2 L3

EVAPORATOR MOTOR CURRENT

Record Software Versions MODE — RUN STATUS

SUB-MODE ITEM DISPLAY ITEM

EXPANSION

VERS MBB CESR-131279- _ _-_ _

MARQ CESR-131171- _ _-_ _ EMM CESR-131174- _ _-_ _ NAVI CESR-131227- _ _-_ _ AUX CESR-131333- _ _-_ _ CXB CESR-131173- _ _-_ _

(PRESS ENTER & ESCAPE SIMULTANEOUSLY TO OBTAIN SOFTWARE VERSIONS)

CL-4

COMMENTS:

_________________________________________________________________________________________

SIGNATURES:

START-UP CUSTOMER TECHNICIAN ____________________________ REPRESENTATIVE ____________________________

DATE ___________________________________ DATE ________________________________________

CL-5

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53380003-01 Printed in U.S.A. Form 38AP-1T Pg CL-6 210 11-09 Replaces: New

CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - -

Carrier 38APD025-100, 38APS025-050 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual