Carrier 30RAP010-060 User Manual 2

30RAP010-060

AQUASNAP® Air-Cooled Chillers

with COMFORTLINK™ Controls

Controls, Start-Up, Operation,

Service, and Troubleshooting

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .2

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Conventions Used in this Manual. . . . . . . . . . . . . . . . . . . . 3

Basic Controls Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-44

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Energy Management Module (EMM) . . . . . . . . . . . . . . . .19

Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . . . . . .19

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

Expansion Valve Board (EXV) . . . . . . . . . . . . . . . . . . . . . .19

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

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

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

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

Carrier Comfort Network

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

• COOLER LEAVING FLUID SENSOR

• COOLER ENTERING FLUID SENSOR

• COMPRESSOR RETURN GAS
TEMPERATURE SENSOR

• OUTDOOR-AIR TEMPERATURE SENSOR (OAT)

• DISCHARGE TEMPERATURE THERMISTOR (DTT)

• REMOTE SPACE TEMPERATURE SENSOR OR DUAL
LEAVING WATER TEMPERATURE SENSOR

Energy Management Module . . . . . . . . . . . . . . . . . . . . . . .29

Loss-of-Cooler Flow Protection. . . . . . . . . . . . . . . . . . . . .29

Electronic Expansion Valves (EXV) . . . . . . . . . . . . . . . . .29

Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

• MINUTES LEFT FOR START

• MINUTES OFF TIME

• LEAD/LAG DETERMINATION

• CAPACITY CONTROL OVERRIDES

Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Operation of Machine Based on Control Method

and Cooling Set Point Selection Settings. . . . . . . . .32

Cooling Set Point Select. . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Low Sound Mode Operation . . . . . . . . . . . . . . . . . . . . . . . .34

Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Optional Factory-Installed Hydronic Package. . . . . . .34

Cooler Pump Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Cooler Pump Sequence of Operation . . . . . . . . . . . . . . .35

Configuring and Operating Dual Chiller Control . . . . 36

Temperature Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

• 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). . . . . . . . . . . . . . . . . . . . . .43

Digital Scroll Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

• DIGITAL SCROLL OPERATION

• DIGITAL COMPRESSOR CONFIGURATION

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44,45

®

(CCN) Interface . . . . . . . . . . 19

System Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

START-UP AND OPERATION . . . . . . . . . . . . . . . . . . . . 45,46

Actual Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Check Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . 45

Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

• TEMPERATURES

• LOW AMBIENT OPERATION

• VOLTAGE — ALL UNITS

OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . .46,47

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47-63

Page

Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

• CONTROL COMPONENTS

Electronic Expansion Valve (EXV) . . . . . . . . . . . . . . . 47

EXV Troubleshooting Procedure . . . . . . . . . . . . . . . . . . . 47

• FIELD SERVICING INSTRUCTIONS

• VALVE REPLACEMENT

• VALVE REASSEMBLY

Compressor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . 49

Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

• BRAZED-PLATE COOLER HEAT EXCHANGER
REPLACEMENT

• BRAZED-PLATE COOLER HEAT EXCHANGER
CLEANING

Oil Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Microchannel Heat Exchanger (MCHX)
Condenser Coil Maintenance and Cleaning

Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Check Refrigerant Feed Components . . . . . . . . . . . . . . 50

•FILTER DRIER

• MOISTURE-LIQUID INDICATOR

• MINIMUM LOAD VALVE

• PRESSURE RELIEF DEVICES

Check Unit Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

• HIGH-PRESSURE SWITCH

• PRESSURE TRANSDUCERS

• COOLER FREEZE-UP PROTECTION

• HEATER CABLE

• WINTER SHUTDOWN

Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Chilled Water Flow Switch. . . . . . . . . . . . . . . . . . . . . . . . . . 53

Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Condenser Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Motormaster

• GENERAL OPERATION

• CONFIGURATION

• DRIVE PROGRAMMING

•EPM CHIP

• LOSS OF CCN COMMUNICATIONS

• REPLACING DEFECTIVE MODULES

Hydronic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63,64

Recommended Maintenance Schedule . . . . . . . . . . . . . 63

Microchannel Heat Exchanger (MCHX)
Condenser Coil Maintenance and Cleaning

Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . 64-73

®

V Controller . . . . . . . . . . . . . . . . . . . . . . . . . 58

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

Catalog No. 04-53300067-01 Printed in U.S.A. Form 30RAP-2T Pg 1 12-10 Replaces: 30RAP-1T

CONTENTS (cont)

Complete Unit Stoppage and Restart . . . . . . . . . . . . . . 64

• GENERAL POWER FAILURE

• UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS
OFF

• CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN

• OPEN 24-V CONTROL CIRCUIT BREAKERS

• COOLING LOAD SATISFIED

• THERMISTOR FAILURE

• LOW SATURATED SUCTION

• COMPRESSOR SAFETIES

Alarms and Alerts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

APPENDIX A — DISPLAY TABLES . . . . . . . . . . . . . . 74-89

APPENDIX B — CCN TABLES . . . . . . . . . . . . . . . . . . 90-100

APPENDIX C — FACTORY SETTINGS FOR

PUMP AND MANUAL STARTERS. . . . . . . . . . . . . . . . 101

APPENDIX D — OPTIONAL BACNET

COMMUNICATONS WIRING . . . . . . . . . . . . . . . . . 102-109

APPENDIX E — MAINTENANCE SUMMARY

AND LOG SHEETS . . . . . . . . . . . . . . . . . . . . . . . . . . 110-113

START-UP CHECKLIST FOR 30RAP LIQUID

CHILLER

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1 to CL-10

Page

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

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.

When working on this equipment, observe precautions in

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. 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.

To prevent potential damage to heat exchanger, always run
fluid through heat exchanger when adding or removing
refrigerant charge. Use appropriate brine solutions in cooler
fluid loop to prevent the freezing of brazed plate heat
exchanger, optional hydronic section and/or interconnecting
piping when the equipment is exposed to temperatures
below 32 F (0 °C). Proof of flow switch and strainer are
factory installed on all models. Do NOT remove power
from this chiller during winter shutdown periods without
taking precaution to remove all water from heat exchanger
and optional hydronic system. Failure to properly protect
the system from freezing may constitute abuse and may
void warranty.

CAUTION

Compressors and optional hydronic system pumps require
specific rotation. Test condenser fan(s) first to ensure
proper phasing. Swap any two incoming power leads to
correct condenser fan rotation before starting any other
motors.

CAUTION

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

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.

2

ENTER

ESCAPE

ENTER

ENTER

ESCAPE

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ESCAPE

ENTER

ENTER

ENTER

Run Status

Service Test

Temperature

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

Alarm Status

ENTER

MODE

ESCAPE

Fig. 1 — Scrolling Marquee Display

ENTER

ENTER

ESCAPE

ENTER

ENTER

ENTER

GENERAL

This publication contains Controls, Start-Up, Operation,
Service, and Troubleshooting information for the 30RAP
AquaSnap

®

air-cooled chillers. See Table 1. These chillers are
equipped with ComfortLink™ controls and electronic expan­sion valves (EXVs).

WARNING

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

Table 1 — Unit Sizes

UNIT NOMINAL CAPACITY (TONS)
30RAP010 10
30RAP015 14
30RAP018 16
30RAP020 19
30RAP025 24
30RAP030 28
30RAP035 34
30RAP040 39
30RAP045 43
30RAP050 48
30RAP055 53
30RAP060 56

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 OPTN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OPTNLLCS = 1 (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

) point names are also
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.

Basic Controls Usage

SCROLLING MARQUEE DISPLAY — The scrolling mar­quee display is the standard interface display to the ComfortLink

Control System for 30RAP units. 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 the highest
operating level is displayed to move through the top 11 mode
levels indicated by LEDs on the left side of the display. See
Fig. 1 and Tables 2-14.

Once within a mode or sub-mode, pressing the
and keys simultaneously will put the scrolling
marquee display into expanded text mode where the full mean­ing of all sub-modes, items and their values can be displayed
for the current selection. Press the and
keys to return the scrolling marquee display to its default menu
of rotating display items (those items in Run Status
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 alternates
with the value. Press the key at a changeable item
and the value will be displayed. Press again and the
value will begin to flash indicating that the value can be
changed. 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 ‘PASS’ and ‘WORD’ will alternate
on the display when required. The default password is 0111.
Press and the 1111 password will be displayed. Press

again and the first digit will begin to flash. Use the
arrow keys to change the number and press to accept
the digit. Continue with the remaining digits of the password.
The password can only be changed through CCN operator in-

®

terface software such as ComfortWORKS

, ComfortVIEW™

and Service Tool.

See Tables 2-14 and Appendix A for further details.

3



VIEW).



ACCESSORY NAVIGATOR™ DISPLAY MODULE —

ENTER

ESCAPE

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ESCAPE

ENTER

ENTER

ENTER

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ENTER

ENTER

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ENTER

ENTER

ENTER

Fig. 2 — 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. 2.

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 dis-

abled, 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 1111. 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.

Adjusting the Contrast

— 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.

ComfortLink

MODE

Alarm Status

Run Status

Service Test

Temperatures

Pressure

s

Setpoints

Inputs

Outputs

Configuration

Time Clock

ESC

Operating Modes

Alarms

ENTER

4

Table 2 — Scrolling Marquee Display Menu Structure*

MODE

SUB-MODE

RUN

STATUS

Auto

View of

Run Status

(VIEW)

Unit Run

Hour and

Start

(RUN)

Compressor

Run Hours

(HOUR)

Compressor

Starts

(STRT)

Preventive

Maintenance

(PM)

Software

Ver si on
(VERS)

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
For example, using the language selection item:
Language Selection (Configuration

SERVICE

TEST

Service

Te s t M o d e

(TEST)

Outputs

and Pumps

(OUTS)

Ciruit A Comp

Te st

(CMPA)

Ciruit B Comp

Test

(CMPB)



TEMPERATURES PRESSURES

Ent and Leave Unit

Temperatures

Temperatures

Sub-mode NameITEM)



DISPLANG)

Te mp s
(UNIT)

Ckt A

(CIR.A)

Ckt B

(CIR.B)

Pressures

Ckt A

(PRC.A)

Pressures

Ckt B

(PRC.B)

SET

POINTS

Cooling

Setpoints

(COOL)

Head

Pressure

Setpoint

(HEAD)

Brine

Freeze

Setpoint

(FRZ)

INPUTS OUTPUTS CONFIGURATION

General

Inputs

(GEN.I)

Circuit
Inputs

(CRCT)

4-20mA

Inputs
(4-20)

General
Outputs

(GEN.O)

Outputs

Circuit A

EXV

(A.EXV)
Outputs

Circuit B

EXV

(B.EXV)

Outputs

Circuit A

(CIR.A)

Outputs

Circuit B

(CIR.B)

Display

Configuration

(DISP)

Unit

Configuration

(UNIT)

Unit Options 1

Hardware

(OPT1)

Unit Options 2

Controls

(OPT2)

CCN Network
Configuration

(CCN)

Head Pressure

Comp. Delta

(HP.A)

Head Pressure

Comp. Delta

(HP.B)

Cir. A EXV

Configuration

(EXV.A)

Cir. B EXV

Configuration

(EXV.B)

Motormaster

Configuration

(MM)

Reset Cool Temp

(RSET)

Set Point and

Ramp Load

(SLCT)
Service

Configuration

(SERV)

Broadcast

Configuration

(BCST)

TIME

CLOCK

Time of

Day

(TIME)

Month,

Date, Day,

and Year

(DATE)

Daylight
Savings

Time

(DST)

Local

Holiday

Schedules

(HOL.L)

Local
Occu­pancy

Schedule

(SCH.L)

Schedule

Override

(OVR)

OPERATING

MODES

Modes

(MODE)

ALARMS

Current
(CRNT)

Reset

Alarms

(RCRN)

Alarm

History

(HIST)

5

Table 3 — Run Status Mode and Sub-Mode Directory

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY SUB-ITEM DISPLAY SUB-ITEM DISPLAY

VIEW EWT XXX.X F ENTERING FLUID TEMP

LWT XXX.X F LEAVING FLUID TEMP

SETP XXX.X F ACTIVE SETPOINT

CTPT XXX.X F CONTROL POINT

LOD.F XXX LOAD/UNLOAD FACTOR

STAT X CONTROL MODE 0 = Service Test

LD.PM LEAD PUMP

OCC YES/NO OCCUPIED

LS.AC YES/NO LOW SOUND ACTIVE

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

ITEM

EXPANSION

COMMENT

1 = Off Local

2 = Off CCN

3 = Off Time

4 = Off Emrgcy

5 = On Local

6 = On CCN

7 = On Time

8 = Ht Enabled

9 = Pump Delay

MNTH XX MONTH OF YEAR 1 = January, 2 = February, etc.

DATE XX DAY OF MONTH 01-31

YEAR XX YEAR OF CENTURY

RUN HRS.U XXXX HRS MACHINE OPERATING HOURS

STR.U XXXX MACHINE STARTS

HR.P1 XXXX.X PUMP 1 RUN HOURS

HR.P2 XXXX.X PUMP 2 RUN HOURS

HOUR HRS.A XXXX HRS CIRCUIT A RUN HOURS

HRS.B XXXX HRS CIRCUIT B RUN HOURS See Note

HR.A1 XXXX HRS COMPRESSOR A1 RUN HOURS

HR.A2 XXXX HRS COMPRESSOR A2 RUN HOURS

HR.B1 XXXX HRS COMPRESSOR B1 RUN HOURS See Note

HR.B2 XXXX HRS COMPRESSOR B2 RUN HOURS See Note

STRT ST.A1 XXXX COMPRESSOR A1 STARTS

ST.A2 XXXX COMPRESSOR A2 STARTS

ST.B1 XXXX COMPRESSOR B1 STARTS See Note

ST.B2 XXXX COMPRESSOR B2 STARTS See Note

PM PUMP PUMP MAINTENANCE

SI.PM XXXX HRS PUMP SERVICE INTERVAL Default: 8760

P.1.DN XXXX HRS PUMP 1 SERVICE COUNTDOWN

P.2.DN XXXX HRS PUMP 2 SERVICE COUNTDOWN

P.1.MN YES/NO PUMP 1 MAINTENANCE DONE User Entry

P.2.MN YES/NO PUMP 2 MAINTENANCE DONE User Entry

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

6

Table 3 — Run Status Mode and Sub-Mode Directory (cont)

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ESCAPE

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY SUB-ITEM DISPLAY SUB-ITEM DISPLAY

PM (cont) PMDT PUMP MAINTENANCE DATES

P.1.M0 MM/DD/YY HH:MM

P.1.M1 MM/DD/YY HH:MM

P.1.M2 MM/DD/YY HH:MM

P.1.M3 MM/DD/YY HH:MM

P.1.M4 MM/DD/YY HH:MM

P.2.M0 MM/DD/YY HH:MM

P.2.M1 MM/DD/YY HH:MM

P.2.M2 MM/DD/YY HH:MM

P.2.M3 MM/DD/YY HH:MM

P.2.M4 MM/DD/YY HH:MM

STRN STRAINER MAINTENANCE

SI.ST XXXX HRS STRAINER SRVC INTERVAL Default: 8760

S.T.DN XXXX HRS STRAINER SRVC COUNTDOWN

S.T.MN YES/NO STRAINER MAINT. DONE User Entry

ST.DT STRAINER MAINT. DATES

S.T.M0 MM/DD/YY HH:MM

ITEM

EXPANSION

COMMENT

S.T.M1 MM/DD/YY HH:MM

S.T.M2 MM/DD/YY HH:MM

S.T.M3 MM/DD/YY HH:MM

S.T.M4 MM/DD/YY HH:MM

COIL COIL MAINTENANCE

SI.CL XXXX HRS COIL SRVC INTER Default: 8760

C.L.DN XXXX HRS COIL SERVICE COUNTDOWN

C.L.MN YES/NO COIL 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

VERS MBB CESR131460-xx-xx xx-xx is Version number*

EXV CESR131172-xx-xx xx-xx is Version number*

AUX1 CESR131333-xx-xx xx-xx is Version number*

EMM CESR131174-xx-xx xx-xx is Version number*

MARQ CESR131171-xx-xx xx-xx is Version number*

NAVI CESR130227-xx-xx xx-xx is Version number*

*Press and simultaneously to obtain version number.

7

Table 4 — Service Test Mode and Sub-Mode Directory

ENTER

ENTER

ENTER

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

TEST ON/OFF SERVICE TEST MODE To Enable Service Test Mode,

OUTS OUTPUTS AND PUMPS

EXV.A 0 to 100% EXV A % OPEN

EXV.B 0 to 100% EXV B % OPEN

FAN 1 ON / OFF FAN 1 REL AY

FAN 2 ON / OFF FAN 2 REL AY

FAN 3 ON / OFF FAN 3 REL AY

FAN 4 ON / OFF FAN 4 REL AY

FAN 5 ON / OFF FAN 5 REL AY

FAN 6 ON / OFF FAN 6 REL AY

V.HPA 0 to 100% VAR HEAD PRESS %

V.HPB 0 to 100% VAR HEAD PRESS %

CLP.1 ON/OFF COOLER PUMP 1 RELAY

CLP.2 ON/OFF COOLER PUMP 2 RELAY

UL.TM 0 to 15 COMP A1 UNLOAD TIME

CL.HT ON/OFF COOLER/PUMP HEATER

ITEM

EXPANSION

COMMENT

move Enable/Off/Remote
Contact switch to OFF. Change
TEST to ON. Move switch to
ENABLE.

RMT.A ON/OFF REMOTE ALARM RELAY

CMPA CIRCUIT A COMPRESSOR TEST

CC.A1 ON/OFF COMPRESSOR A1 RELAY

UL.TM 0 to 15 COMP A1 UNLOAD TIME

CC.A2 ON/OFF COMPRESSOR A2 RELAY

CC.A3 ON/OFF COMPRESSOR A3 RELAY

CC.A4 ON/OFF COMPRESSOR A4 RELAY

MLV ON/OFF MINIMUM LOAD VALVE RELAY

CMPB CIRCUIT B COMPRESSOR TEST See Note

CC.B1 ON/OFF COMPRESSOR B1 RELAY

CC.B2 ON/OFF COMPRESSOR B2 RELAY

CC.B3 ON/OFF COMPRESSOR B3 RELAY

CC.B4 ON/OFF COMPRESSOR B4 RELAY

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

8

Table 5 — Temperature Mode and Sub-Mode Directory

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

UNIT ENT AND LEAVE UNIT TEMPS

CEWT XXX.X F COOLER ENTERING FLUID

CLWT XXX.X F COOLER LEAVING FLUID

OAT XXX.X F OUTSIDE AIR TEMPERATURE

SPT XXX.X F SPACE TEMPERATURE

DLWT XXX.X F LEAD/LAG LEAVING FLUID

CIR.A 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.G AS XXX.X F DISCHARGE GAS TEMP

SH.A XXX.X ^F SUCTION SUPERHEAT TEMP

CIR.B TEMPERATURES CIRCUIT B See Note

SCT.B XXX.X F SATURATED CONDENSING TMP See Note

SST.B XXX.X F SATURATED SUCTION TEMP See Note

RGT.B XXX.X F COMPR RETURN GAS TEMP See Note

SH.B XXX.X ^F SUCTION SUPERHEAT TEMP See Note

ITEM

EXPANSION

COMMENT

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Table 6 — Pressure Mode and Sub-Mode Directory

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

PRC.A PRESSURES CIRCUIT A

DP.A XXX.X PSIG DISCHARGE PRESSURE

SP.A XXX.X PSIG SUCTION PRESSURE

PRC.B PRESSURES CIRCUIT B See Note

DP.B XXX.X PSIG DISCHARGE PRESSURE See Note

SP.B XXX.X PSIG SUCTION PRESSURE See Note

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

ITEM

EXPANSION

Table 7 — Set Points Mode and Sub-Mode Directory

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

COOL COOLING SETPOINTS

CSP.1 XXX.X

F COOLING SETPOINT 1 Default: 44 F

CSP.2 XXX.X F COOLING SETPOINT 2 Default: 44 F

CSP.3 XXX.X F ICE SETPOINT Default: 32 F

HEAD HEAD PRESSURE SETPOINTS

H.DP XXX.X F HEAD SETPOINT Default: 95 F

F. O N XXX.X F FAN ON SETPOINT Default: 95 F

F. O F F XXX.X F FAN OFF SETPOINT Default: 72 F

ITEM

EXPANSION

COMMENT

COMMENT

B.OFF XXX.X F BASE FAN OFF DELTA TEMP Default: 23 F

F. D LT XXX.X F FAN STAGE DELTA Default: 15 F

FRZ BRINE FREEZE SETPOINT

BR.FZ XXX.X F BRINE FREEZE POINT Default: 34 F

9

Table 8 — Inputs Mode and Sub-Mode Directory

ENTER

ENTER

ENTER

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

GEN.I GENERAL INPUTS

STST STRT/STOP START/STOP SWITCH

FLOW ON/OFF COOLER FLOW SWITCH

PM.F.1 OPEN/CLSE COOLER PUMP 1 INTERLOCK

PM.F.2 OPEN/CLSE COOLER PUMP 2 INTERLOCK

HT.RQ ON/OFF HEAT REQUEST

DLS1 ON/OFF DEMAND LIMIT SWITCH 1

DLS2 ON/OFF DEMAND LIMIT SWITCH 2

ICED ON/OFF ICE DONE

DUAL ON/OFF DUAL SETPOINT SWITCH

CRCT CIRCUITS INPUTS

FKA1 ON/OFF COMPRESSOR A1 FEEDBACK

FKA2 ON/OFF COMPRESSOR A2 FEEDBACK

FKA3 ON/OFF COMPRESSOR A3 FEEDBACK

FKA4 ON/OFF COMPRESSOR A4 FEEDBACK

FKB1 ON/OFF COMPRESSOR B1 FEEDBACK See Note

FKB2 ON/OFF COMPRESSOR B2 FEEDBACK See Note

FKB3 ON/OFF COMPRESSOR B3 FEEDBACK See Note

ITEM

EXPANSION

COMMENT

FKB4 ON/OFF COMPRESSOR B4 FEEDBACK See Note

4-20 4-20 MA INPUTS

DMND XX.X MA 4-20 MA DEMAND SIGNAL

RSET XX.X MA 4-20 MA RESET SIGNAL

CSP XX.X MA 4-20 MA COOLING SETPOINT

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

Table 9 — Outputs Mode and Sub-Mode Directory

SUB-MODE

GEN.O GENERAL OUTPUTS

KEYPAD

ENTRY

ITEM DISPLAY

FAN1 ON/OFF FAN 1 RELAY

FAN2 ON/OFF FAN 2 RELAY

FAN3 ON/OFF FAN 3 RELAY

FAN4 ON/OFF FAN 4 RELAY

FAN5 ON/OFF FAN 5 RELAY

FAN6 ON/OFF FAN 6 RELAY

V.HPA ON/OFF FAN SPEED CIRCUIT A

V.HPB ON/OFF FAN SPEED CIRCUIT B

C.WP1 ON/OFF COOLER PUMP RELAY 1

C.WP2 ON/OFF COOLER PUMP RELAY 2

CLHT ON/OFF COOLER/PUMP HEATER

MLV.R ON/OFF MINIMUM LOAD VALVE RELAY

ITEM

EXPANSION

COMMENT

10

Table 9 — Outputs Mode and Sub-Mode Directory (cont)

ENTER

ENTER

ENTER

ENTER

ENTER

SUB-MODE

A.EXV OUTPUTS CIRCUIT A EXV

B.EXV OUTPUTS CIRCUIT B EXV

CIR.A OUTPUTS CIRCUIT A

CIR.B OUTPUTS CIRCUIT B (See Note)

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

KEYPAD

ENTRY

ITEM DISPLAY

EXV.A 0 to 100% EXV % OPEN

APPR ON/OFF CIRCUIT A APPROACH

AP.SP APPROACH SETPOINT

X.SH.R SH RESET AT MAX UNL-DIG

S.SH.R DIGLOAD TO START SH RST

SH_R AMOUNT OF SH RESET

OVR.A EXVA OVERRIDE

SPH.A SUCTION SUPERHEAT TEMP

ASH.S ACTIVE SUPERHEAT SETPT

AMP.S ACTIVE MOP SETPT

PLM.A CIR A EXV POSITION LIMIT

SPR.1 SPARE 1 TEMPERATURE

EXV.B 0 to 100% EXV % OPEN

APPR ON/OFF CIRCUIT B APPROACH

AP.SP APPROACH SETPOINT

OVR.B EXVB OVERRIDE

SPH.B SUCTION SUPERHEAT TEMP

ASH.S ACTIVE SUPERHEAT SETPT

AMP.S ACTIVE MOP SETPT

PLM.B CIR B EXV POSITION LIMIT

SPR.2 SPARE 2 TEMPERATURE

CC.A1 ON/OFF COMPRESSOR A1 RELAY

DPE.R ON/OFF COMP A1 LOAD PERCENT

CC.A2 ON/OFF COMPRESSOR A2 RELAY

CC.A3 ON/OFF COMPRESSOR A3 RELAY

CC.A4 ON/OFF COMPRESSOR A4 RELAY

CC.B1 ON/OFF COMPRESSOR B1 RELAY

CC.B2 ON/OFF COMPRESSOR B2 RELAY

CC.B3 ON/OFF COMPRESSOR B3 RELAY

CC.B4 ON/OFF COMPRESSOR B4 RELAY

ITEM

EXPANSION

COMMENT

Table 10 — Configuration Mode and Sub-Mode Directory

SUB-MODE

DISP DISPLAY CONFIGURATION

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.

KEYPAD

ENTRY

ITEM DISPLAY

TEST ON/OFF TEST DISPLAY LEDS

METR ON/OFF METRIC DISPLAY Off = English; On = Metric

LANG X LANGUAGE SELECTION

PAS.E ENBL/DSBL PASSWORD ENABLE Default: Enable

PASS xxxx SERVICE PASSWORD Default: 1111

ITEM

EXPANSION

11

COMMENT

Default: 0
0 = English

1 = Espanol
2 = Francais
3 = Portuguese

Table 10 — Configuration Mode and Sub-Mode Directory

ENTER

ENTER

SUB-MODE

UNIT UNIT CONFIGURATION

KEYPAD

ENTRY

ITEM DISPLAY

SIZE XX UNIT SIZE

SZA.1 XX COMPRESSOR A1 SIZE Unit Dependent

SZA.2 XX COMPRESSOR A2 SIZE Unit Dependent

SZA.3 XX COMPRESSOR A3 SIZE Unit Dependent

SZA.4 XX COMPRESSOR A4 SIZE Unit Dependent

SZB.1 XX COMPRESSOR B1 SIZE Unit Dependent

SZB.2 XX COMPRESSOR B2 SIZE Unit Dependent

SZB.3 XX COMPRESSOR B3 SIZE Unit Dependent

SZB.4 XX COMPRESSOR B4 SIZE Unit Dependent

SH.SP XX.X F SUPERHEAT SETPOINT Default: 9 F

FAN.S NUMBER OF FANS 1 = One Fan

ITEM

EXPANSION

COMMENT

2 = Two Fans
3 = Three Fans
4 = Four Fans

EXV YES/NO EXV MODULE INSTALLED?

A1.TY YES/NO COMPRESSOR A1 DIGITAL?

MAX.T 0 to 12 MAXIMUM A1 UNLOAD TIME

OPT1 UNIT OPTIONS 1 HARDWARE

FLUD X COOLER FLUID

MLV.S YES/NO MINIMUM LOAD VALVE SELECT Default: No

D.G.EN ENBL/DSBL DISCHARGE GAS TEMP ENABLE

CSB.E ENBL/DSBL CSB BOARDS ENABLE

CPC ON/OFF COOLER PUMP CONTROL Default: Off

PM1E YES/NO COOLER PUMP 1 ENABLE

PM2E YES/NO COOLER PUMP 2 ENABLE

PM.P.S YES/NO COOLER PMP PERIODIC STRT Default: No

PM.SL X COOLER PUMP SELECT Default: Automatic

PM.DY XX MIN COOLER PUMP SHUTDOWN DLY

PM.DT XXXX HRS PUMP CHANGEOVER HOURS Default: 500 hours

ROT.P YES/NO ROTATE COOLER PUMPS NOW User Entr y

EMM YES/NO EMM MODULE INSTALLED

CND.T 0,1 COND HX

MOPS XX EXV MOP SET POINT Range: 40 - 80 Default: 50

APPR XX CONFIG APPROACH SETPOINT Range: 5 - 40 Default: 9.0

Default: Yes

Default: No

Yes = A1 Compressor is Digital

Scroll

Default: 7

Max 12 010,015
Max 10 018-060

Default: Water
1 = Water
2 = Medium Temperature
Brine

0 = Automatic
1 = Pump 1 Starts first
2 = Pump 2 Starts first

0 to 10 minutes, Default: 1
min.

0 = RTPF
1 = MCHX Default MCHX

12

Table 10 — Configuration Mode and Sub-Mode Directory (cont)

ENTER

ENTER

ENTER

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

OPT2 UNIT OPTIONS 2 CONTROLS

CTRL X CONTROL METHOD Default: Switch

LOAD X LOADING SEQUENCE SELECT Default: Equal

LLCS X LEAD/LAG CIRCUIT SELECT Default: Automatic

LCWT XX.X F HIGH LCW ALERT LIMIT

DELY XX MINUTES OFF TIME

ICE.M ENBL/DSBL ICE MODE ENABLE Default: Disable

LS.MD X LOW SOUND MODE SELECT Default: 0

LS.ST 00:00 LOW SOUND START TIME Default: 00:00

LS.ND 00:00 LOW SOUND END TIME Default: 00:00

LS.LT XXX % LOW SOUND CAPACITY LIMIT

CCN CCN NETWORK CONFIGURATION

CCNA XXX CCN ADDRESS

CCNB XXX CCN BUS NUMBER

BAUD X CCN BAUD RATE Default: 9600

HP.A HEAD PRESSURE CMP DELTA

A1.DT XX SCT DELTA FOR COMP A1 Range: 0 - 50 Default: 12

A2.DT XX

SCT DELTA FOR COMP A2 Range: 0 - 50 Default: 12

HP.B HEAD PRESSURE CMP DELTA

B1.DT XX SCT DELTA FOR COMP B1 Range: 0 - 50 Default: 12

B2.DT XX

SCT DELTA FOR COMP B2 Range: 0 - 50 Default: 12

ITEM

EXPANSION

COMMENT

0 = Enable/Off/Remote Switch
2 = Occupancy
3 = CCN Control

1 = Equal
2 = Staged

1 = Automatic
2 = Circuit A Leads
3 = Circuit B Leads

Default: 60

Range: 2 to 60 F

Default: 0 Minutes
Range: 0 to 15 Minutes

0 = Mode Disable
1 = Fan Noise Only
2 = Fan/Compressor Noise

Default: 100%
Range: 0 to 100%

Default: 1
Range: 1 to 239

Default: 0
Range: 0 to 239

1 = 2400
2 = 4800
3 = 9600
4 = 19,200
5 = 38,400

13

Table 10 — Configuration Mode and Sub-Mode Directory (cont)

ENTER

ENTER

ENTER

SUB-MODE

EXV.A CIR A EXV CONFIGURATION

EXV.B CIR B EXV CONFIGURATION

MM MOTORMASTER CONFIGURATION

KEYPAD

ENTRY

ITEM DISPLAY

STR.A XXX EXV CIRC.A START POS Range: 0 - 100 Default: 30

MIN.A XXX EXV CIRC.A MIN POSITION Range: 0 - 100 Default: 8

RNG.A XXXXX EXVA STEPS IN RANGE Range: 0 - 65535 Default: *

SPD.A XXXXX EXVA STEPS PER SECOND Range: 0 - 65535 Default: 200

POF.A XXX EXVA FAIL POSITION IN % Range: 0 - 100 Default: 0

MIN.A XXXXX EXVA MINIMUM STEPS Range: 0 - 65535 Default: 0

MAX.A XXXXX EXVA MAXIMUM STEPS Range: 0 - 65535 Default: *

OVR. A XXX EXVA OVERRUN STEPS Range: 0 - 65535 Default: 167

TYP.A 0,1 EXVA STEPPER TYPE

H.SCT XXX HIGH SCT THRESHOLD Range: 50 - 140 Default: 115

X.PCT XX OPEN EXV X% ON 2ND COMP Range: 0 - 30 Default: 10

X.PER XX MOVE EXV X% ON DISCRSOL Range: 0 - 30 Default: 5

A.PCT XXX PRE-OPEN EXV - FAN ADDING Range: 0 - 100 Default: 10

M.PCT XXX PRE-CLOSE EXV - FAN SUB Range: 0 - 100 Default: 10

S.PCT XXX PRE-CLOSE EXV - LAG SHUT Range: 0 - 100 Default: 10

DELY XXX LAG START DELAY Range: 0 - 100 Default: 10

STR.B XXX EXV CIRC.B START POS Range: 0 - 100 Default: 50

MIN.B XXX EXV CIRC.B MIN POSITION Range: 0 - 100 Default: 8

RNG.B XXXXX EXVB STEPS IN RANGE Range: 0 - 65535 Default: *

SPD.B XXXXX EXVB STEPS PER SECOND Range:

POF.B XXX EXVB FAIL POSITION IN % Range: 0 - 100 Default: 0

MIN.B XXXXX EXVB MINIMUM STEPS Range: 0 - 65535 Default: 0

MAX.B XXXXX EXVB MAXIMUM STEPS Range: 0 - 65535 Default: *

OVR. B XXX EXVB OVERRUN STEPS Range: 0 - 65535 Default: 167

TYP.B 0,1 EXVB STEPPER TYPE

MMR.S YES/NO MOTORMASTER SELECT

P.GAN XX HEAD PRESSURE P GAIN Range: -20 - 20 Default: 1.0

I.GAN XX HEAD PRESSURE I GAIN Range: -20 - 20 Default: 0.1

D.GAN XX HEAD PRESSURE D GAIN Range: -20 - 20 Default: 0.0

MIN.S XXX MINIMUM FAN SPEED Range: 0 - 100 Default: 5.0

ITEM

EXPANSION

COMMENT

0 = UNIPOLAR

1 = BIPOLAR Default: 1

0 - 65535 Default: 200

0 = UNIPOLAR

1 = BIPOLAR Default: 1

* Sizes 010-020 and 035-045, default is 1596. Sizes 025,030, and 050-060, default is 2500.

14

Table 10 — Configuration Mode and Sub-Mode Directory (cont)

ENTER

ENTER

ENTER

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

RSET RESET COOL TEMP

CRST X COOLING RESET TYPE Default: No Reset

MA.DG XX.X F 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.X F RETURN - NO RESET TEMP

RT.F XXX.X F RETURN - FULL RESET TEMP

RT.DG XX.X F

RETURN - DEGREES RESET

DMDC X DEMAND LIMIT SELECT Default: None

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

LLEN ENBL/DSBL LEAD/LAG CHILLER ENABLE Default: Disable

MSSL SLVE/MAST MASTER/SLAVE SELECT Default: Master

SLVA XXX SLAVE ADDRESS

LLBL X LEAD/LAG BALANCE SELECT

LLBD XXX LEAD/LAG BALANCE DELTA

LLDY XXX LAG START DELAY

PARA YES PARALLEL CONFIGURATION Default: YES (CANNOT BE CHANGED)

SLCT SETPOINT AND RAMP LOAD

CLSP X COOLING SETPOINT SELECT Default: Single

RL.S ENBL/DSBL RAMP LOAD SELECT Default: Enable

CRMP X.X COOLING RAMP LOADING

SCHD XX SCHEDULE NUMBER

Z.GN X.X DEADBAND MULTIPLIER

SERV SERVICE CONFIGURATION

EN.A1 ENBL/DSBL ENABLE COMPRESSOR A1 Unit dependent

EN.A2 ENBL/DSBL ENABLE COMPRESSOR A2 Unit dependent

EN.B1 ENBL/DSBL ENABLE COMPRESSOR B1 Unit dependent

EN.B2 ENBL/DSBL ENABLE COMPRESSOR B2 Unit dependent

ITEM

EXPANSION

COMMENT

0 = No Reset
1 = 4 to 20 mA Input
2 = Outdoor Air Temperature
3 = Return Fluid
4 = Space Temperature

Default: 0.0F
Range: –30 to 30F

Default: 125F (51.7C)
Range: 0° to 125F

Default: 0.0F (-17.8C)
Range: 0 to 125F

Default: 0.0F
Range: –30 to 30F

Default: 10.0F (5.6C)
Range: 0 to 125F COOLER T

Default: 0.0F (0.0C)
Range: 0 to 125F COOLER T

Default: 0.0F
Range: –30 to 30F (–34.4 to -1.1 C)

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: 0
Range: 0 to 239

Default: Master Leads
0 = Master Leads
1 = Slave Leads
2 = Automatic

Default: 168 hours
Range: 40 to 400 hours

Default: 5 minutes
Range: 0 to 30 minutes

0 = Single
1 = Dual Switch
2 = Dual CCN Occupied
3 = 4 to 20 mA Input (requires

EMM)

Default: 1.0
Range: 0.2 to 2.0

Default: 1
Range: 1 to 99

Default: 1.0
Range: 1.0 to 4.0

15

Table 10 — Configuration Mode and Sub-Mode Directory (cont)

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

SUB-MODE

BCST BROADCAST CONFIGURATION

KEYPAD

ENTRY

ITEM DISPLAY

T.D.BC ON/OFF CCN TIME/DATE BROADCAST

OAT.B ON/OFF CCN OAT BROADCAST

G.S.BC ON/OFF GLOBAL SCHEDULE BROADCAST

BC.AK ON/OFF CCN BROADCAST ACK’ER

ITEM

EXPANSION

Table 11 — Time Clock Mode and Sub-Mode Directory

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY SUB-ITEM DISPLAY

TIME TIME OF DAY

HH.MM XX.XX HOUR AND MINUTE Military (00:00 – 23:59)

DATE MONTH,DATE,DAY AND YEAR

MNTH XX MONTH OF YEAR 1-12 (1 = January, 2 = February, etc)

DOM XX DAY OF MONTH Range: 01-31

DAY X DAY OF WEEK 1-7 (1 = Sunday, 2 = Monday, etc)

YEAR XXXX YEAR OF CENTURY

DST DAYLIGHT SAVINGS TIME

STR.M XX MONTH Default: 4, Range 1 – 12

ITEM

EXPANSION

COMMENT

COMMENT

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

HOL.L LOCAL HOLIDAY SCHEDULES HD.01 through HD.30

MON XX HOLIDAY START MONTH Range 0 – 12

DAY XX START DAY Range 0 – 31

LEN XX DURATION (DAYS) Range 0 - 99

SCH.N XX SCHEDULE NUMBER Default: 1, Range 1 – 99

SCH.L LOCAL OCCUPANCY SCHEDULE

PER.1 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

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

* Repeats for Occupancy Periods 2 through 8.

16

Table 11 — Time Clock Mode and Sub-Mode Directory (cont)

ENTER

ENTER

ENTER

ENTER

ENTER

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY SUB-ITEM DISPLAY

OVR 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

T.OVR YES/NO TIMED OVERRIDE User Entry

ITEM

EXPANSION

Table 12 — Operating Mode and Sub-Mode Directory

COMMENT

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

ITEM

EXPANSION

MODE MODES CONTROLLING UNIT

MD01 ON/OFF CSM CONTROLLING CHILLER

MD02 ON/OFF WSM CONTROLLING CHILLER

MD03 ON/OFF MASTER/SLAVE CONTROL

MD05 ON/OFF RAMP LOAD LIMITED

MD06 ON/OFF TIMED OVERRIDE IN EFFECT

MD07 ON/OFF LOW COOLER SUCTION TEMPA

MD08 ON/OFF LOW COOLER SUCTION TEMPB

MD09 ON/OFF SLOW CHANGE OVERRIDE

MD10 ON/OFF MINIMUM OFF TIME ACTIVE

MD13 ON/OFF DUAL SETPOINT

MD14 ON/OFF TEMPERATURE RESET

MD15 ON/OFF DEMAND/SOUND LIMITED

MD16 ON/OFF COOLER FREEZE PROTECTION

MD17 ON/OFF LOW TEMPERATURE COOLING

MD18 ON/OFF HIGH TEMPERATURE COOLING

MD19 ON/OFF MAKING ICE

MD20 ON/OFF STORING ICE

COMMENT

MD21 ON/OFF HIGH SCT CIRCUIT A

MD22 ON/OFF HIGH SCT CIRCUIT B

MD23 ON/OFF MINIMUM COMP ON TIME

MD24 ON/OFF PUMP OFF DELAY TIME

MD25 ON/OFF LOW SOUND MODE

LEGEND

CSM — Chillervisor System Manager
SCT — Saturated Condensing Temperature
WSM — Water System Manager

Table 13 — Alarms Mode and Sub-Mode Directory

SUB-MODE

KEYPAD

ENTRY

ITEM

CRNT AXXX OR TXXX CURRENTLY ACTIVE ALARMS

RCRN YES/NO RESET ALL CURRENT ALARMS

HIST AXXX OR TXXX ALARM HISTORY

ITEM

EXPANSION

17

COMMENT

Alarms are shown as AXXX.
Alerts are shown as TXXX.

Alarms are shown as AXXX.
Alerts are shown as TXXX.

Table 14 — Operating Modes

MODE

NO.

01 CSM CONTROLLING CHILLER Chillervisor System Manager (CSM) is controlling the chiller.

02 WSM CONTROLLING CHILLER Water System Manager (WSM) is controlling the chiller.

03 MASTER/SLAVE CONTROL Dual Chiller control is enabled.

05

06

07

08

09

10 MINIMUM OFF TIME ACTIVE Chiller is being held off by Minutes Off Time (Configuration

13

14

15

16

17

18

19

20

21

22

23

24

25

ITEM EXPANSION DESCRIPTION

RAMP LOAD LIMITED Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature

TIMED OVERRIDE IN EFFECT Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed

LOW COOLER SUCTION TEMPA Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Sat-

LOW COOLER SUCTION TEMPB Circuit B cooler Freeze Protection mode. At least one compressor must be on, and the Sat-

SLOW CHANGE OVERRIDE Slow change override is in effect. The leaving fluid temperature is close to and moving

DUAL SETPOINT Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set Points

TEMPERATURE RESET Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leav-

DEMAND/SOUND LIMITED Demand limit is in effect. This indicates that the capacity of the chiller is being limited by

COOLER FREEZE PROTECTION Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section

LOW TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and

HIGH TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing.

MAKING ICE Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set Points

STORING ICE Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set Points

HIGH SCT CIRCUIT A Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than

HIGH SCT CIRCUIT B Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than

MINIMUM COMP ON TIME Cooling load may be satisfied, however control continues to operate compressor to ensure

PUMP OFF DELAY TIME Cooling load is satisfied, however cooler pump continues to run for the number of minutes set

LOW SOUND MODE Chiller operates at higher condensing temperature and/or reduced capacity to minimize

is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling
Ramp Loading (Configuration
desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.

schedule, forcing unit to Occupied mode. Override can be implemented with unit under
Local (Enable) or CCN (Carrier Comfort Network

urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If
the saturated suction temperature is less than the Brine Freeze Point (Set Points



BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F
(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the satu­rated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for
90 seconds, a stage of capacity will be removed from the circuit. The control will continue to
decrease capacity as long as either condition exists.

urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If
the saturated suction temperature is less than the Brine Freeze Point (Set Points



BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F
(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the satu­rated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for
90 seconds, a stage of capacity will be removed from the circuit. The control will continue to
decrease capacity as long as either condition exists.

towards the control point.



CSP.1) during occupied periods and Cooling Set Point 2 (Set PointsCOOLCSP.2)
during unoccupied periods.

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

for definition). The chiller will be shut down when either fluid temperature falls below the
Freeze point.

decreasing faster than -0.5° F per minute. Error between leaving fluid and control point
exceeds fixed amount. Control will automatically unload the chiller if necessary.

Error between leaving fluid and control point exceeds fixed amount. Control will automatically
load the chiller if necessary to better match the increasing load.



CSP.3) to make ice. The ice done input to the Energy Management Module (EMM) is open.



CSP.2). The ice done input to the Energy Management Module (EMM) is closed.

the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity
may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con­densing temperature.

the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity
may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con­densing temperature.

proper oil return. May be an indication of oversized application, low fluid flow rate or low loop
volume.

by the configuration variable Cooler Pump Shutdown Delay (Configuration

PM.DY).



overall unit noise during evening/night hours (Configuration



SLCTCRMP). The pull-down limit can be modified, if

®

) control. Override expires after each use.



OPT2DELY).



OPT2LS.MD).





OPT1



FRZ



FRZ



COOL

COOL



COOL





18

CONTROLS

General —

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

The control system is composed of several components as
listed in the sections below. See Fig. 3-5 for typical control box
drawings. See Fig. 6 and 7 for control schematics.

The 30RAP air-cooled scroll chillers contain

Main Base Board (MBB) — See Fig. 8. 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 and thermistors. See Table 15. The
MBB also receives the feedback inputs from each compressor
current sensor board and other status switches. See Table 16.
The MBB also controls several outputs. Relay outputs con­trolled by the MBB are shown in Table 17. 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).
See Fig. 8.

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 leaving fluid 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 ice done functions. 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.

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).

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.

Expansion Valve Board (EXV) — The EXV board

communicates with the MBB and directly controls the expan­sion valves to maintain the correct compressor superheat.

Enable/Off/Remote Contact Switch — The Enable/

Off/Remote Contact switch is a 3-position switch used to
control the chiller. When switched to the Enable position the
chiller is under its own control. Move the switch to the Off
position to shut the chiller down. Move the switch to the
Remote Contact position and a field-installed dry contact can
be used to start the chiller. The contacts must be capable of
handling a 24 vac, 50-mA load. In the Enable and Remote
Contact (dry contacts closed) positions, the chiller is allowed to
operate and respond to the scheduling configuration, CCN
configuration and set point data. See Fig. 9.

Emergency On/Off Switch — The Emergency On/Off

switch should only be used when it is required to shut the
chiller off immediately. Power to the MBB, EMM, and
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.’ The elec­tronic expansion valve board (EXV) and energy management
board (EMM) have 4-position DIP switches. All switches are

set to ‘On’ for these boards. The auxiliary board (AUX) has an
8-position DIP switch. Switches 2, 5, and 7 are set to ‘On.’

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.

Carrier Comfort Network® (CCN) Interface —

The 30RAP chiller 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 18. 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
(ground), and black (–) conductors. (Substitute appropri­ate colors for different colored cables.)

19

3. Connect the red wire to (+) terminal on LVT of the plug,
the white wire to COM terminal, and the black wire to the
(–) terminal.

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 15 — Thermistor Designations

THERMISTOR

LWT J8-13,14 (MBB) Cooler Leaving Fluid

EWT J8-11,12 (MBB) Cooler Entering Fluid

RGTA

RGTB

OAT

SPT

DTT

LEGEND

LWT — Leaving Water Temperature
MBB — Main Base Board

PIN

CONNECTION

POINT

J8-1,2 (MBB) Circuit A Return Gas

J8-3,4 (MBB) Circuit B (035-060 only)

J8-7,8 (MBB) Outdoor-Air Temperature

J8-5,6 (MBB)
TB5-5,6

J6-1,2 (AUX) Discharge Temperature

THERMISTOR INPUT

Temperature

Return Gas Temperature

Sensor
Accessory Remote Space

Temperature Sensor or
Dual LWT Sensor

Thermistor

Table 16 — Status Inputs

STATUS SWITCH PIN CONNECTION POINT
Chilled Water Pump 1 J7-1,2
Chilled Water Pump 2 J7-3,4

Remote On/Off LVT-13,14

Cooler Flow Switch J7-9,10
Compressor Fault Signal, A1 J9-11,12
Compressor Fault Signal, A2 J9-5,6
Compressor Fault Signal, B1 J9-8,9
Compressor Fault Signal, B2 J9-2,3

Table 17 — Output Relays

RELAY

NO.

Energize Compressor A1 (010-030)

K1

Energize Compressor A1 and Condenser Fan Contac­tor 3 (055,060)

K2 Energize Compressor A2 (all but 010, 015 60 Hz)
K3 Energize Chilled Water Pump 1 Output
K4 Energize Chilled Water Pump 2 Output

Energize Compressor B1 (035-050)

K5

Energize Compressor B1 and Condenser Fan Contac­tor 3 (055,060)

K6 Energize Compressor B2 (035-060)
K7 Alarm Relay
K8 Cooler/Pump Heater

K9 Energize Condenser Fan Contactor 1 (018-060)
K10 Energize Condenser Fan Contactor 2 (018-060)
K11 Minimum Load Valve

DESCRIPTION

Table 18 — 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 .

Sensors — The electronic control uses 4 to 7 thermistors to

sense temperatures for controlling chiller operation. See
Table 15. These sensors are outlined below. Thermistors RG­TA, RGTB, EWT, LWT, and OAT are identical in temperature
versus resistance and voltage drop performance. The dual chill­er thermistor is 5 kat 77 F (25 C)thermistor. Space tempera­ture thermistor is a 10 kat 77 F (25 C). The DTT thermistor
is an 86 kat 77 F (25 C)thermistor. See Thermistors section
for temperature-resistance-voltage drop characteristics.

COOLER LEAVING FLUID SENSOR — The thermistor is
installed in a well in the factory-installed leaving fluid piping
coming from the bottom of the brazed-plate heat exchanger.

COOLER ENTERING FLUID SENSOR — The thermistor is
installed in a well in the factory-installed entering fluid piping
coming from the top of the brazed-plate heat exchanger.

COMPRESSOR RETURN GAS TEMPERATURE SEN­SOR — These thermistors are installed in a well located in the
suction line of each circuit.

OUTDOOR-AIR TEMPERATURE SENSOR (OAT) —
This sensor is factory installed on a bracket which is inserted
through the base pan of the unit.

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 connected to the AUX board.

REMOTE SPACE TEMPERATURE SENSOR OR DUAL
LEAVING WATER TEMPERATURE SENSOR — One of
two inputs can be connected to the LVT. See appropriate sen­sor below.

Remote Space Temperature Sensor
33ZCT55SPT) is an accessory sensor that is remotely mounted
in the controlled space and used for space temperature reset.
The sensor should be installed as a wall-mounted thermostat
would be (in the conditioned space where it will not be sub­jected to either a cooling or heating source or direct exposure
to sunlight, and 4 to 5 ft above the floor).

Space temperature sensor wires are to be connected to
terminals in the unit main control box. The space temperature
sensor includes a terminal block (SEN) and a RJ11 female
connector. The RJ11 connector is used access into the Carrier
Comfort Network

®

(CCN) at the sensor.

To connect the space temperature sensor (Fig. 10):

1. Using a 20 AWG twisted pair conductor cable rated for
the application, connect 1 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 5 and 6
on TB5 located in the unit control box.

— Sensor (part no.

20

Units on the CCN can be monitored from the space at the
sensor through the RJ11 connector, if desired. To wire the RJ11
connector into the CCN (Fig. 11):

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 18 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.

LEGEND FOR FIG. 3-7

ALMR — Alarm Relay
AUX — Auxilliary
BR — Boiler Relay
C—Contactor, Compressor
CB — Circuit Breaker
CCB — Compressor Circuit Breaker
CH — Crankcase Heater
CHC — Cooler/Pump Heater Contactor
COMP — Compressor
CSB — Current Sensor Board
CWFS — Chilled Water Flow Switch
CWP — Chilled Water Pump
DGS — Digital Scroll Compressor
DPT — Discharge Pressure Transducer
DTT — Discharge Temperature Thermistor
DUS — Digital Unloader Solenoid
EMM — Energy Management
EXV — Electronic Expansion Valve
FB — Fuse Block
FC — Fan Contactor
FCB — Fan Circuit Breaker
FIOP — factory Installed Option
FR — Fan Relay
GND — Ground
HPS — High-Pressure Switch
LON — Local Operating Network
LV T — Low Voltage Terminal Block
MBB — Main Base Board
MLV — Minimum Load Valve
MM — Motormaster
MP — Motor Protector
MS — Manual Starter
NEC — National Electrical Code
OAT — Outdoor-Air Thermistor
OFM — Outdoor Fan Motor
RGT — Return Gas Thermistor
SCCR — Short Circuit Current Rating
SPT — Suction Pressure Transducer
SW — Switch
TB — Terminal Block
TNKR — Storage Tank Heater Relay
TRAN — Transformer
UPC — Unitary Protocol Converter

Terminal Block

Terminal (Unmarked)

Terminal (Marked)

Splice

Factory Wiring

Field Wiring

Accessory or Option Wiring

To indicate common potential only; not to represent wiring.

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.

Dual Leaving Water Temperature Sensor

— For dual chiller
applications (parallel only are supported), connect the dual
chiller leaving fluid temperature sensor (refer to Configuring
and Operating Dual Chiller Control section on page 36) to the
space temperature input of the Master chiller. If space tempera­ture is required for reset applications, connect the sensor to the
Slave chiller and configure the slave chiller to broadcast the
value to the Master chiller.

21

CONTROL BOX

FAN

1

A1

COMPRESSOR

LOCATED OVER EMM AND EXV

EMM

EXV

LON

AUX

UPC

TB1

TB4

CSB-A1

MBB

CHC

CCB

FB-1

TRAN

DISCONNECT

OPTION/TB

C-A1

MM

MS-

CWP1

CWP1

MS-

CWP2

CWP2

Fig. 3 — Typical Control Box for 30RAP010,015

Fig. 4 — Typical Control Box for 30RAP018-030

a30-4962

a30-4963

FB-1

AUX

LON

EMM

EXV

CHC

CCB-1

CSB-A1

TB1

UPC

TB4

C-A1

FC1/MM

MBB

FB-3

MS-

CWP1

CWP1 CWP2

TRAN

MS-

CWP2

CSB-A2

FC2 C-A2

CCB-2

DISCONNECT

OPTION/TB

22

Fig. 5 — Typical Control Box for 30RAP035-060

a30-4964

OPTION/TB

DISCONNECT

CHC

EXV

EMM

CB-4

CB-3

TB1

CSB-B2

CSB-B1

UPC

LON

AUX

TB4

MS-

MS-

CWP2

CWP1

FR-4

FR-3

C-B2

CWP2

CWP1

C-B1

MBB

055,060 UNIT ONLY

B2

2

4

FAN

FAN

FAN3FAN

LOCATED OVER EMM AND EXV

1

B1

A2

COMPRESSORS

A1

CONTROL BOX END

FCB-1/2/3

CB-2

CB-1

TRAN-1

CSB-A2

CSB-A1

TRAN-2

23

FC-3

FC-2

MM

FC-1

FR-2

FR-1

C-A2

C-A1

OPTIONAL

Fig. 6A — Typical Wiring Schematic, 30RAP018-030 Units — Power Wiring

a30-4965

DISCONNECT

DISCONNECT

TO FUSED

PER NEC

EQUIP GND

~

FU5

RED

1

H3

H4

TRAN3

X3

WHT

WHT

GRN/YEL

2

GFI-CO

FIOP/ACCESSORY

SILVER SCREW

SILVER SCREW

GRN-YEL

FUSE

NUMBER

FU1 & FU2

380-3-60,460-3-60,575-3-60

FU3 (24V)

208/230-3-60,230-3-60

380-3-60,460-3-60,575-3-60

FU4 (115V)

380-3-60,460-3-60,575-3-60

FB1

(NO MM)

380-3-60,460-3-60,575-3-60

FB1

(WITH MM)

380-3-60,460-3-60,575-3-60

FB2

380-3-60,460-3-60,575-3-60

FB3

VOLTAGE SERIES

575-3-60 100 H1 & H2

380-3-60 200 H1 & H2

230-3-60 500 H2 & H4

208-3-60 500 H3 & H4

460-3-60 600 H1 & H4

CONNECT FOR
APPROPRIATE
PRIMARY VOLTAGE
SEE TABLE 1

TB4

XF

RED

7

FU3

RED

A1

SW2

C1

B1

VIO

CB3

3.2 AMPS

TB4

VIO

6

VIO

CB1A

1

2

3

H2

~

SECONDARY

115V

LINE

RESET

TEST

LOAD

UNIT VOLTAGE

208/230-3-60

380-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60,575-3-60

208/230-3-60

208/230-3-60

208/230-3-60

208/230-3-60

TABLE 1

TRAN1

PRIMARY

H2

H1

SECONDARY 24V

X1

BRN

VIO

3

2

BRN

1

VIO

BRN

VIO

BRN

STANDARD

TERMINAL

BLOCK

TB1A

TO FUSED DISCONNECT

11

PER NEC

12

13

~

FU6

BLK

1

HF

H1

X1

FU4

XF

BLK

2

BRASS SCREW

BRASS SCREW

VOLTAGE SERIES

575-3-60 100 H1-H2 XF-X2

230-3-60 400,500 H2-H4 XF-X2

208-3-60 500 H3-H4 XF-X2

460-3-60 600 H1-H4 XF-X2

REPLACE

TRAN

WITH

SIZE

FNQ-R-3.5

FNQ-R-2.5

200VA

FNQ-R-2

FNQ-R-1.5

FNM-10

200VA

FNQ-R-2.5

AV0056UF & 5UF

FNQ-R-3.5

FNM-6

500VA

LP-CC-20

NONE

KTK-R-15

NONE

KTK-R-20208/230-3-60

LP-CC-20

NONE

LP-CC-20

NONE

TERMINAL

CONNECTIONS

FOR PRIMARY SIDE

FU1

BLK

FU2

YEL

H3

H4

X2

GRN/YEL

BRN

BRN

C

TB1

UPC FIOP

24VAC

2

GND

UPC

HOT

1

3

J1

3

3

2

1

CWFS

MBB

2

2

BRN

1

1

RED

J2

31

BRN

BLU

21

22

23

CONNECTIONS

FOR PRIMARY SIDE

TERMINAL

3

2

1

BLK
BLK
BLK

YEL
YEL
YEL

BLU
BLU
BLU

CONNECTIONS FOR
SECONDARY SIDE

TB4CTB1

5

RED BRN

FIOP/ACCESSORY

J1

3

2

EMM

1

J2

TERMINAL

CH-A1

BLU

T2

T3

T2

T3

FC1

11 21

12

13 23

FC2

11 21

12

13 23

CA1

11 21

12 22

13 23

CA2

11 21

12 22

13 23

22

22

CHC

42

CHC

86

BLK

BLK

YEL

BLU

BLU
BLK

BLK

YEL

BLU

BLK

BLK

BLK

BLK

BLK

BLK

BLK-1

BLK-2

BLK-3

BLK-1

BLK-2

BLK-3

~

COOLER/PUMP
HEATERS
(380,460,575V)

~~

~

CH-A2

BLK

WHT

BLK

1

T1

2

T2

3

1

2

3

COMP A1

T3

GRN/YEL

T1

COMP A2

T2

T3

GRN/YEL

L1

CWP1
WATER

L2

PUMP

L3

GRN/YEL

L1

CWP2
WATER

L2

PUMP

L3

GRN/YEL

1

2

3

1

2

3

1

3

2

BLK

BLK

COOLER/PUMP
HEATERS
(208/230,230V)

~

WHT

OFM1

GRN/YEL

OFM2

GRN/YEL

1

2

3

380V,460V,575V

CCB-1

ONLY

11

BLK

12

YEL

13

FB3

11

12

13

HIGH SCCR
ONLY

BLU

BLK

YEL

BLU

208/230V ONLY

21

11

BLK

22

12

YEL

23

13

BLU

CCB-2

11

12

13

MS-CWP1

L1

BLK

YEL

L2

BLU

L3

MS-CWP2

L1

BLK

YEL

L2

BLU

L3

FB1

21

22

23

YEL

BLUBLK

BLK

YEL

BLU

CSB-A1

21

BLK

22

YEL

BLU

23

YEL

BLU BLK

CSB-A2

21

BLK

22

YEL

23

BLU

CHILLED WATER PUMP FIOP

CWP1

L1 T1

T1

L2

T2

T3

L3

CWP2

L1 T1

T1

L2

T2

T3

L3

BLK

YEL

BLU

BLK

YEL

BLU

YEL

BLUBLK

BLK

YEL

LOW AMBIENT OPERATION (MOTORMASTER V) FIOP/ACCESSORY

FB3

11

21

BLK

22

12

YEL

13

23

BLU

HIGH SCCR
ONLY

NOTES:

1. FACTORY WIRING IS IN ACCORDANCE WITH UL 1995 STANDARDS.
ANY FIELD MODIFICATIONS OR ADDITIONS MUST BE IN
COMPLIANCE WITH ALL APPLICABLE CODES.

C MIN WIRE FOR FIELD POWER SUPPLY.

3. ALL FIELD INTERLOCK CONTACTS MUST HAVE A MIN RATING OF
2 AMPS @ 24VAC SEALED. SEE FIELD INTERLOCK WIRING.

4. COMPRESSOR AND FAN MOTORS ARE THERMALLY PROTECTED-­ THREE PHASE MOTORS PROTECTED AGAINST PRIMARY SINGLE
PHASE CONDITIONS.

5. TERMINALS 13 & 14 OF LVT ARE FOR FIELD CONNECTION
OF REMOTE ON-OFF. THE CONTACT MUST BE RATED FOR DRY
CIRCUIT APPLICATION CAPABLE OF HANDLING A 5VDC
1 MA TO 20 MA LOAD.

6. FOR 500 SERIES UNIT OPERATION AT 208-3-60V LINE VOLTAGE,
TRAN1 PRIMARY CONNECTIONS MUST BE MOVED TO TERMINALS H3 & H4.

7. FOR UNITS WITH LOW AMBIENT MOTOR MASTER V FIOP/ACCESSORY,
FAN CONTACTOR FC1 IS REPLACED WITH MOTORMASTER RELAY MMR.

J1

EXV

J2

DGS FIOP

12

11

J1

AUX

3

3

2

2

1

1

3

3

2

2

BRN

1

1

RED

3

3

2

2

2

BRN

1

1

1

RED

FB1

11

21

BLK

22

12

YEL

13

23

BLU

FB2

11

21

BLK

22

12

YEL

13

23

BLU

MM-A

L1 T1

BLK

L2 T2

YEL

L3 T3

BLU

2

*1

25

2

FC2

11 21

BLK

YEL

22

12

13 23

BLU

BLK

YEL

CHC

42

CHC

86

1

BLK-1

2

BLK-2

3

BLK-3

YEL

MMR

VIO

11 14

240 1/4W

RED

FROM
AUX-J4

BLK

BLK-1

BLK-2

BLK-3

~

BLK

WHT

COOLER/PUMP
HEATERS
(380,460,575V)

~~

~

BLK

8. IF CHILLED WATER PUMP INTERLOCK IS USED,
REMOVE JUMPER FROM TERMINAL 11 TO 17 AND
WIRE INTERLOCK CONTACT ACROSS TERMINALS 11 & 17.

9. MP-A1 NOT USED IN THE FOLLOWING UNITS:

018,020: ALL UNITS
025,030: 460V UNITS WITHOUT DIGITAL SCROLL

10. MP-A2 NOT USED IN THE FOLLOWING UNITS:

018-020: ALL UNITS
025,030: 460V UNITS

11. JUMPER PLUG REQUIRED WHEN MP NOT USED

* MM SIGNAL CONNECTION

1

2

3

~

1

3

2

OFM1

GRN/YEL

VOLTAGE

208/230/460/575

380

BLK

BLK

COOLER/PUMP
HEATERS
(208/230,230V)

~

WHT

OFM2

GRN/YEL

ZHBT

061

06A31

1

2

3

24

HEAT

Fig. 6B — Typical Wiring Schematic, 30RAP018-030 Units — Control Wiring

a30-4966

SEE NOTES ON
PAGE 24.

CWPI

SEE

NOTE 8

REMOTE

ON-OFF

SWITCH

(SEE NOTE

5)

DUAL

SETPOINT

J10A

J10B

RLY 11

RLY 9

RLY 10

RLY 5

RLY 6

RLY 7

RLY 8

RLY 1

RLY 2

RLY 3

RLY 4

RED

WHT

BLK

RED

BLK

WHT

MBB

LVT

20

19

LVT

17

11

13

14

15

16

LEN CCN

J1

PORT 2

PORT 1A

J12

6

7

J11

2

3

4

11

12

13

14

9

7

8

6

5

LVT

(+)

(COM)

(-)

SHIELD

UPC

NET +

1

NET -

2

N/C

3

N/C

4

SIGNAL

5

NET +

1

NET 2

2

SHIELD

3

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

1

10

2

11

3

12

4

13

5

14

6

15

7

16

8

17

9

18

10

19

11

20

12

21

13

22

14

23

15

24

16

25

17

26

18

27

BR

HEAT/BOILER FIELD

INSTALLED WIRING

BLK

RED

OFF

RED

RED

VIO

J13

BLK

1

WHT

2

RED

3

BRN

4

RED

5

BLK

6

WHT

7

RED

8

OPTION

J3

UPC OPT

CB1

3.2 AMPS

CB2

5.2 AMPS

TB4

ORN

5

RED

RED

RED

GRA

PNK

A2

SW2

RED

ORN

C2

ORN

B2

RED

TB4

7

XF

RED

BLK

TRAN1

SECONDARY 24V

X1

FU3

GRA

GRA

MLV-A

MLV ACCSY

FC1

PNK

SEE NOTE 7

ORN

TB4

RED

4

RED

RED

BLK

RED

ORN

HPS-A

BLK

BLK

BLK

ORN

GRA

SEE NOTE 11

SEE NOTE 11

VIO

RED

6

6

GRA

5

5

GRA

4

4

3

J6

HR

ALMR

3

2

2

VIO

1

1

BRN

LVT

J11

18

1

STORAGE TANK
HEATER RELAY

ORN

PL1-2PL1-1

MP-A1

VIO

VIO

VIO

M1

M2

VIO

PL1-6PL1-5

MP-A2

VIO

M1

M2

VIO

LVT

J12

25

1

2

24

ORN

MAX LOAD-5VA SEALED

10VA INRUSH

ACCESSORY

RED

ORN

ORN

GRA

VIO

RED

FIOP OR

FIELD INSTALLED

OPTION

FIELD INSTALLED

MAX LOAD-5VA SEALED

10VA INRUSH

FC2

ALM

R

TNK

R

CHC

CA1

CA2

CWP

1

CWP

2

RED

TB1

X2

GRN/YEL

BRN

A2A1

A2A1

A2A1

A2A1

BRN

BRN

BRN

BRN

BRN

BRN

BRN

C

BRN

BRN

BRN

BRN

BRN

BRN

BRN

LVT

J12

5

21

BRN

BRN

BRN

BRN

A2A1

A2A1

A2A1

BRN

BRN

BRN

BRN

A2

A2

A2

A2

A2

A2

A2

C

C

C

A2

A2

C

A2

A2

MBB J1-2

UPC GND

CWFS 3

EXV J1-2

LVT J12-5

CHC

CA1

CWP1

CA2

FC2

FC1

FC3

TB1

TB1

TB1

CA2

CA1

TB1

CWP2

CWP1

TB4

4

RED

SEE NOTE 9

T2T1MP-A1

SEE NOTE 10

T2T1MP-A2

PL1-4

BRN

BRN

PL1-8

BRN

BRN

PL1-3

RED

RED

PL1-7

RED

RED

BRN

CWFS

4

2

10

10

WHT

1

RED

1

2

WHT

2

3

J3

9

ORN

9

J4

MAIN
BASE

8

8

SW1

A1

ENABLE

RED

C1

B1

RED

GRA

GRA

13

RED

14

CWP2

13

VIO

14

CWP1

BRN

RED

BLK

WHT

RED

BLK

WHT

RED

LON

GND

NET

J4

1

2

BOARD

7

7

6

6

5

5

4

4

3

3

2

2

1

1

10

10

9

9

8

8

7

7

6

6

5

5

4

4

3

3

2

2

1

1

J9

J7

J8

J5

BLK

3

4

4

1

RED

1

2

WHT

2

3

BLK

3

4

4

5

BRN

5

6

RED

6

1

1

RED

2

2

ORN

3

3

BRN

4

4

RED

5

5

ORN

6

6

BRN

7

7

RED

8

8

ORN

9

9

BRN

10

10

RED

11

11

ORN

12

12

BRN

1

1

2

2

3

3

4

4

5

5

6

6

1

7

2

8

3

9

4

10

1

11

2

12

3

13

4

14

1

15

2

16

3

17

4

18

5

19

6

20

7

21

8

22

9

23

10

24

11

25

12

26

1

MARQUEE

RED

1

DISPLAY

2

WHT

2

3

BLK

3

4

4

5

RED

5

6

BRN

6

2

CSB

3

B2

1

2

CSB

3

A2

1

2

CSB

3

B1

1

2

CSB

3

A1

1

B

C

A

B

C

A

RGTA

OAT

EVAPORATOR ENTERING
FLUID TEMP

EVAPORATOR LEAVING
FLUID TEMP

+

DPTA

-

+

SPTA

-

LVT

J12 T55

3

4

23

22

T-55

SEN

ACCSY

SPACE TEMPERATURE
ACCESSORY OR
DUAL CHILLER LWT

RED

BLK

BLU

BLU

RED

BLK

RED

BLK

RED

BLK

RED

GRN

BLK

RED

GRN

BLK

BLK

WHT

RED

BLK

WHT

RED

BLK

WHT

RED

BLK

WHT

RED

BLK

WHT

RED

4

4

3

3

2

2

1

1

4

4

3

3

2

2

1

1

6

-

3

5

G

2

4

+

1

3

-

3

2

G

2

1

+

1

12345678

DARK = SWITCH LOCATION

4

4

3

3

2

2

1

1

4

4

3

3

2

2

1

1

ACCESSORY

J3

J4

J9

DGS OR

FIOP

J3

J4

FIOP/

MM

EXV

AUX

EMM

1

1

2

2

3

3

J7

4

4

5

5

PL-EXVA

BLK

1

1

BLK

YEL

2

2

WHT

3

3

J6

4

GRN

4

5

5

RED

7

-

VIO RED

7

8

J2

CH1

BRN BLK

8

1

CH11

RED RED

1

2

J6

-

BLK BLK

2

1

CH9

RED

1

2

J4

-

BLK

2

ON

OFF

J5

J7

J6

1

CH10

1

2

-

2

1

1

GRA

2

2

GRA

3

3

RED

4

4

RED

5

5

BLU

6

6

BLU

7

7

8

8

9

9

10

10

11

11

12

12

13

13

14

14

1

1

2

2

VIO

3

3

BRN

4

4

5

5

ORN

6

6

7

7

8

8

PNK

9

9

10

10

11

11

12

12

PL50-1

PL50-2

PL50-3

PL50-4

TO MM-A

J10

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

EXV-A

GRY

RED

DUS

DTT

LVT

1

2

ICE DONE

3

4

DLS STEP 1

5

6

DLS STEP 2

DEMAND

+

7

LIMIT

-

8

4-20mA

TEMP

9

+

RESET

-

4-20mA

COOLING

+

10

SETPOINT

-

4-20mA

25

COMP A2

GRN/YEL

TRAN1

H2

H3

H4

SECONDARY 24V

RED

FC2

BLK-1

BLK-2

BLK-3

FU3

SW2

C1

A1

B1

1

2

3

H1

X1

CONNECT FOR
APPROPRIATE
PRIMARY VOLTAGE
SEE TABLE 1

1

2

3

CB1A

11

12

13

TO FUSED

DISCONNECT

PER NEC

OPTIONAL

DISCONNECT

3.2 AMPS

CB3

1

2

3

T3

T1

T2

T3

T1

T2

3

2

1

LOW AMBIENT OPERATION (MOTORMASTER V) FIOP/ACCESSORY

GRN/YEL

GRN/YEL

XF

VIO

11 21

12

22

13 23

11 21

12 22

13 23

CA1

BLK

YEL

BLU

11 21

12 22

13 23

CA2

11

12

13

21

22

23

CCB-1

BLK

YEL

BLU

BLK

YEL

BLU

YEL

BLU BLK

YEL

BLU

BLK

11

12

13

21

22

23

CCB-2

BLK

YEL

BLK

380V,460V,575V

ONLY

BLU

YEL

BLU

GRN/YEL

OFM1

FC3

1

2

3

11 21

12

22

13 23

COMP B2

1

2

3

T3

T1

T2

T3

T1

T2

3

2

1

GRN/YEL

GRN/YEL

11 21

12 22

13 23

CB1

BLK

YEL

BLU

11 21

12 22

13 23

CB2

11

12

13

21

22

23

CCB-3

BLK

YEL

BLU

BLK

YEL

BLU

YEL

BLU BLK

YEL

BLU

BLK

11

12

13

21

22

23

CCB-4

BLK

YEL

380V,460V,575V

ONLY

208/230V ONLY

BLU

BLU

BLU

BLU
BLU

YEL

YEL

YEL
YEL

BLK

BLK

BLK
BLK

BLK-1

BLK-2

BLK-3

BLK

YEL

BLU

BLK

YEL

BLU

YEL

BLUBLK

BRN

FU1

BLK

FU2

YEL

GRN/YEL

TRAN2

COM

RED

7

TB4

VIO

6

TB4

VIO

C

TB1

BLK

YEL

BRN

BRN

PRIMARY

PRIMARY

CONNECT FOR
APPROPRIATE
PRIMARY VOLTAGE
SEE TABLE 2

X2

* MM SIGNAL CONNECTION

VOLTAGE

TB HZ

208/230/460/575

160

380

13A 60

FCB2/FB2

NOTES:

1. FACTORY WIRING IS IN ACCORDANCE WITH UL 1995 STANDARDS.
ANY FIELD MODIFICATIONS OR ADDITIONS MUST BE IN
COMPLIANCE WITH ALL APPLICABLE CODES.

2. USE 75

C MIN WIRE FOR FIELD POWER SUPPLY.

3. ALL FIELD INTERLOCK CONTACTS MUST HAVE A MIN RATING OF
2 AMPS @ 24VAC SEALED. SEE FIELD INTERLOCK WIRING.

4. COMPRESSOR AND FAN MOTORS ARE THERMALLY PROTECTED-­ THREE PHASE MOTORS PROTECTED AGAINST PRIMARY SINGLE
PHASE CONDITIONS.

5. TERMINALS 13 & 14 OF LVT ARE FOR FIELD CONNECTION
OF REMOTE ON-OFF. THE CONTACT MUST BE RATED FOR DRY
CIRCUIT APPLICATION CAPABLE OF HANDLING A 5VDC
1 MA TO 20 MA LOAD.

6. FOR 500 SERIES UNIT OPERATION AT 208-3-60V LINE VOLTAGE,
TRAN1 PRIMARY CONNECTIONS MUST BE MOVED TO TERMINALS H3 & H4.

10. MP-A1 NOT USED IN THE FOLLOWING UNITS:
035-045: ALL UNITS

11. MP-A2 NOT USED IN THE FOLLOWING UNITS:
035-045: ALL UNITS

12. MP-B1 NOT USED IN THE FOLLOWING UNITS:
035,040: ALL UNITS
045-060: 460V UNITS

13. MP-B2 NOT USED IN THE FOLLOWING UNITS:
035,040: ALL UNITS
045-060: 460V UNITS

14. JUMPER PLUG REQUIRED WHEN MP NOT USED

7. FOR 575-3-60V UNITS, FAN CIRCUIT BREAKER FCB2
IS REPLACED WITH FUSE BLOCK FB2.

SEE NOTE 7

BLK

BLU

YEL

VOLTAGE SERIES

TERMINAL

CONNECTIONS

FOR PRIMARY SIDE

575-3-60 100 H1 & H2

380-3-60 200 H1 & H2

230-3-60 500 H2 & H4

208-3-60 500 H3 & H4

460-3-60 600 H1 & H4

TABLE 1

UNIT VOLTAGE

REPLACE

WITH

FNQ-R-3.5

FU1 & FU2

FUSE

NUMBER

380-3-60

TRAN
SIZE

200VA

FNQ-R-2.5

208/230-3-60

FNM-10

FU3 (24V)

380-3-60,460-3-60,575-3-60

200VA

208/230-3-60

VOLTAGE SERIES

TERMINAL

CONNECTIONS

FOR PRIMARY SIDE

575-3-60 100 COM & 575

380-3-60 200

230-3-60 500

208-3-60 500

460-3-60 600

TABLE 2

460-3-60

575-3-60

FNQ-R-2

FNQ-R-1.5

COM & 380

COM & 230

COM & 208

COM & 460

208

230

380

400

575
460

8. FOR UNITS WITH LOW AMBIENT MOTOR MASTER V FIOP/ACCESSORY,
030-050: FAN CONTACTOR FC1 IS REPLACED WITH MOTORMASTER RELAY MMR.

SECONDARY 24V

3.2 AMPS

CB4

RED

3

3

2

2

1

1

J2

BRN

RED

2

2

1

J1

1

3

3

EXV

BRN

RED

CWFS

CH-A2

BLU
BLK

CH-B1

BLU
BLK

CH-A1

BLU
BLK

CH-B2

BLU
BLK

GRN/YEL

OFM2

1

2

3

BLK-1

BLK-2

BLK-3

GRN/YEL

FC1

1

2

3

11 21

12

22

13 23

BLK-1

BLK-2

BLK-3

BLU

YEL

BLK

CWP1

CWP2

MS-CWP2

MS-CWP1

BLK

BLK

BLK

BLK

BLK

BLK

L3

L1

L2

CWP1
WATER
PUMP

L3

L1

L2

CWP2
WATER
PUMP

L1 T1

L2

T2

L3

T3

L1

L2

L3

T1

T2

T3

L1 T1

L2

T2

L3

T3

L1

L2

L3

T1

T2

T3

BLK

YEL

BLU

BLK

YEL

BLU

GRN/YEL

GRN/YEL

VOLTAGE SERIES

TERMINAL

CONNECTIONS

FOR PRIMARY SIDE

TERMINAL

CONNECTIONS FOR

SECONDARY SIDE

575-3-60 100 H1-H2 XF-X2

230-3-60 400,500 H2-H4 XF-X2

208-3-60 500 H3-H4 XF-X2

460-3-60 600 H1-H4 XF-X2

TRAN3

SECONDARY

115V

WHT

RESET

TEST

GRN-YEL

GFI-CO

FIOP/ACCESSORY

BRASS SCREW

SILVER SCREW

WHT

FU4

X3

X1

LOAD

LINE

BRASS SCREW

SILVER SCREW

BLK

2

2

XF

H4

H1

HF

H2

H3

BLK

1

FU6

RED

1

FU5

~

~

~

FU5 & FU6

500VA

FNM-6

FU4 (115V)

380-3-60,460-3-60,575-3-60

500VA

208/230-3-60

460-3-60,575-3-60

208/230-3-60,230-3-60

FNQ-R-2.5

FNQ-R-3.5

9. IF CHILLED WATER PUMP INTERLOCK IS USED,

REMOVE JUMPER FROM TERMINAL 11 TO 17 AND

CHILLED WATER PUMP FIOP

WIRE INTERLOCK CONTACT ACROSS TERMINALS 11 & 17.

050-060: 460V UNITS WITHOUT DIGITAL SCROLL

050-060: 460V UNITS

GRN/YEL

OFM3

OFM4

(055,060 ONLY)

(055,060 ONLY)

GRN/YEL

1

2

3

BLK-1

BLK-2

BLK-3

OFM4 (055,060)

OFM3 (035-050)

L1 T1

L2 T2

L3 T3

MMR

11 14

*1

2

YEL

VIO

MM-A

GRN/YEL

FC2

BLK-1

BLK-2

BLK-3

1

2

3

11 21

12

22

13 23

GRN/YEL

OFM1

FC1

1

2

3

11 21

12

22

13 23

BLK-1

BLK-2

BLK-3

BLK

YEL

BLU

BLK

YEL

BLU

FCB2/FB2

SEE NOTE 7

GRN/YEL

OFM2

1

2

3

BLK-1

BLK-2

BLK-3

OFM3

(055,060 ONLY)

(055,060 ONLY)

GRN/YEL

BLK

YEL

055,060: FAN CONTACTOR FC3 IS REPLACED WITH MOTORMASTER RELAY MMR..

208/230V ONLY

BLK

YEL

BLU

11

12

13

21

22

23

BLK

YEL

BLU

11

12

13

21

22

23

FB1

BLK

YEL

BLU

FB3

BLK

YEL

BLU

11

12

13

21

22

23

11

12

13

21

22

23

BLK

YEL

BLU

HIGH SCCR
ONLY

FB1

BLK

YEL

BLU

FB3

BLK

YEL

BLU

11

12

13

21

22

23

11

12

13

21

22

23

BLK

YEL

BLU

HIGH SCCR
ONLY

BLK

25

2

RED

FROM
AUX-J4

YEL

BLUBLK

FB2 NONE

LP-CC-20575-3-60

LP-CC-20

380-3-60,460-3-60,575-3-60

NONE

208/230-3-60

KTK-R-15

380-3-60,460-3-60,575-3-60

NONE

KTK-R-20208/230-3-60

FB1

(NO MM)

FB1

(WITH MM)

LP-CC-20

380-3-60,460-3-60,575-3-60

NONE

208/230-3-60

FB3

3

3

2

2

1

1

J2

BRN

VIO

2

2

1

J1

1

3

3

MBB

BRN

RED

3

3

2

2

1

1

J2

2

J1

1

3

FIOP/ACCESSORY

EMM

BRN

RED

12

2

11

1

J1

DGS FIOP

AUX

2

1

3

2

1

UPC FIOP

UPC

GND

HOT

24VAC

BRN

VIO

42

86

BLK

YEL

COOLER/PUMP
HEATERS
(208/230,230V)

1

2

3

BLK

BLK

WHT

COOLER/PUMP
HEATERS
(380,460,575V)

3

2

BLK

BLK

~

~

~

~

WHT

~~

42

86

BLK

YEL

COOLER/PUMP
HEATERS
(208/230,230V)

1

2

3

BLK

BLK

WHT

COOLER/PUMP
HEATERS
(380,460,575V)

3

2

BLK

BLK

~

~

~

~

WHT

~~

VIO

BRN

BRN

BLU

31

240 1/4W

CHC

CHC

CHC

CHC

STANDARD

TERMINAL

BLOCK

PER NEC

TO FUSED DISCONNECT

21

22

23

TB1A

EQUIP GND

COMP A1

COMP B1

CSB-A1

CSB-A2

CSB-B1

CSB-B2

Fig. 7A — Typical Wiring Schematic, 30RAP035-060 Units — Power Wiring

a30-

5283

26

LEGEND

TERMINAL BLOCK

X

TERMINAL (UNMARKED)
TERMINAL (MARKED)
SPLICE
FACTORY WIRING
FIELD WIRING
ACCESSORY OR OPTION WIRING
TO INDICATE COMMON POTENTIAL
ONLY,NOT TO REPRESENT WIRING

X

9

9

7

7

8

8

4

6

4

6

RLY 9

5

5

1

3

1

3

RLY 11

2

2

A2A1

A2A1

ORN

3

12

1

10

2

11

4

13

MAX LOAD-5VA SEALED

10VA INRUSH

C

TB1

SW2

C2

A2

B2

9

18

10

19

8

17

11

12

13

14

20

21

22

23

6

15

7

16

5

14

15

16

17

18

24

25

26

27

5.2 AMPS

CB2

A2A1

PNK

A2A1

ACCSY ACCESSORY
ALMR ALARM RELAY
AUX AUXILIARY
BR BOILER RELAY
C CONTACTOR, COMPRESSOR
CB CIRCUIT BREAKER
CCB COMPRESSOR CIRCUIT BREAKER
CH CRANKCASE HEATER
CHC COOLER/PUMP HEATER CONTACTOR
CO CONVENIENCE OUTLET
COMP COMPRESSOR
CSB CURRENT SENSOR BOARD
CWFS CHILLED WATER FLOW SWITCH
CWP CHILLED WATER PUMP
CWPI CHILLED WATER PUMP INTERLOCK
DGS DIGITAL SCROLL
DLS DEMAND LIMIT SWITCH
DPT DISCHARGE PRESSURE TRANSDUCER
DTT DISCHARGE TEMPERATURE THERMISTOR
DUS DIGITAL UNLOADER SOLENOID
EMM ENERGY MANAGEMENT
EWT ENTERING WATER TEMPERATURE
EXV EXPANSION VALVE CONTROL BOARD
FB FUSE BLOCK
FC FAN CONTACTOR
FCB FAN CIRCUIT BREAKER
FIOP FACTORY INSTALLED OPTION
FR FAN RELAY
FU FUSE
GND GROUND
HPS HIGH PRESSURE SWITCH
HR HEAT RELAY
LVT LOW VOLTAGE TERMINAL
LWT LEAVING WATER TEMPERATURE
MBB MAIN BASE BOARD
MLV MINIMUM LOAD VALVE
MM MOTORMASTER
MMR MOTORMASTER RELAY
MP MODULAR MOTOR PROTECTOR
MS MANUAL STARTER
OAT OUTDOOR AIR THERMISTOR
OFM OUTDOOR FAN MOTOR
PL PLUG
R RELAY
RGT RETURN GAS TEMPERATURE
RLY RELAY
SAT SUPPLY AIR TEMPERATURE
SCCR SHORT CIRCUIT CURRENT RATING
SPT SUCTION PRESSURE TRANSDUCER
SW SWITCH
TB TERMINAL BLOCK
TNKR STORAGE TANK HEATER RELAY
TRAN TRANSFORMER
UPC UNITARY PROTOCOL CONVERTER

RLY 10

J10A

J10B

RLY 5

RLY 6

RLY 7

RLY 8

RLY 1

RLY 2

RLY 3

RLY 4

12

11

10

9

8

7

6

5

4

3

2

1

26

25

24

23

22

17

16

15

14

13

12

11

10

9

8

7

6

10

9

8

7

6

5

4

3

2

1

8

8

3

1

3

1

3

1

6

2

4

2

4

2

12

1

2

3

4

5

6

7

8

9

10

11

1

2

3

4

5

6

12

11

10

9

8

7

3

4

4

3

2

2

1

1

BLK

WHT

RED

J9

21

20

19

18

10

9

8

7

6

5

4

5

4

3

2

1

4

2

1

3

5

RED

BRN

RED

WHT

BLK

RED

WHT

BLK

6

6

5

5

3

3

2

1

1

2

7

7

4

4

J7

MARQUEE
DISPLAY

MAIN
BASE

BOARD

J8

9

9

10

10

6

5

4

3

2

1

6

5

4

3

2

1

J6

FIOP/

M1

M2

SEE NOTE 14

M1

M2

M1

M2

M1

M2

ORN

GRA

A2A1

ORN

A2A1

VIO

A2A1

PNK

FC2

FC1

CB1

CB2

CHC

CA1

CA2

ORN

ORN

7

TB4

RED

SEE NOTE 14

SEE NOTE 14

SEE NOTE 14

RED

RED

RED

RED

BLU

PNK

ORN

VIO

PNK

RED

ORN

ORN

GRA

VIO

J5

GRA

6

6

5

5

RED

BRN

J4

1

2

3

4

5

6

1

2

3

4

5

6

BLK

WHT

RED

BRN

RED

CSB

B2

2

3

1

RED

ORN

BRN

CSB

A2

2

3

1

RED

ORN

BRN

CSB

B1

2

3

1

RED

ORN

BRN

CSB

A1

2

3

1

RED

ORN

BRN

EXV

4

3

2

1

4

3

2

1

J3

4

3

2

1

4

3

2

1

J4

RED

WHT

BLK

RED

WHT

BLK

ON

OFF

12345678

DARK = SWITCH LOCATION

DUS

3

2

1

3

2

1

6

5

4

3

2

1

J9

2

1

8

7

2

1

8

7

J2

J6

DTT

RED

WHT

BLK

DGS OR

MM

FIOP

MBB

BLK

RED

LVT

4

3

22

23

T-55
ACCSY

SEN

12

11

10

9

8

7

6

5

4

3

2

1

12

11

10

9

8

7

J7

EMM

4

3

2

1

4

3

2

1

J3

4

3

2

1

4

3

2

1

J4

RED

WHT

BLK

RED

WHT

BLK

12

11

10

9

8

7

6

5

4

3

2

1

12

11

10

9

8

7

J6

14

13

14

13

ACCESSORY

1

1

2

3

4

5

6

1

2

3

4

5

6

10

7

8

9

8

6

7

4

5

9

2

3

10

+

-

COOLING
SETPOINT
4-20mA

LVT

8

1

3

2

5

4

7

6

(+)

(-)

(COM)

SHIELD

LEN CCN

1

2

3

1

2

3

4

5

NET +

NET 2

SHIELD

NET +

NET -

N/C

N/C

SIGNAL

PORT 1A

UPC

PORT 2

J3

1

2

LON

OPTION

GND

J4

NET

UPC OPT

BLK

WHT

RED

RED

BLK

WHT

RED

WHT

BLK

RED

BRN

RED

WHT

BLK

OAT

BLU

BLU

PNK

ORN

BRN

VIO

+

-

TEMP
RESET
4-20mA

+

-

DEMAND
LIMIT
4-20mA

LVT

2

1

24

25

ALM

R

LVT

1

18

C

TB1

BRN

MBB J1-2

T2T1MP-A1

T2T1MP-A2

T2T1MP-B1

T2T1MP-B2

SEE NOTE 10

SEE NOTE 11

SEE NOTE 12

SEE NOTE 13

3.2 AMPS

CB1

4

TB4

RED

RED

RED

BRN

UPC GND

BRN

CWFS 3

BRN

CB1

A2

BRN

LVT J12-5

BRN

CHC

A2

BRN

CA1

A2

BRN

TRAN1

SECONDARY 24V

RED

FU3

X1

XF

BRN

X2

GRN/YEL

5

TB4

RED

VIO RED

PL50-1

BRN BLK

PL50-2

RED RED

PL50-3

BLK BLK

PL50-4

BLK

RED

RGTB

BLK

RED

RGTA

2

1

2

1

RED

BLK

J4

CH1

-

CH11

-

CH9

-

-

+

G

-

+

G

2

1

2

1

J5

CH10

-

TO MM-A

SEE NOTE 8

BLK

BLU

EXV-B

5

4

3

2

1

5

4

3

2

1

WHT

BLK

RED

GRN

PL-EXVB

EXV-A

5

4

3

2

1

5

4

3

2

1

WHT

BLK

RED

GRN

PL-EXVA

J7

J6

RED

RED

BLK

GRY

YEL

BLK

YEL

GRY

FIOP OR

FIELD INSTALLED

OPTION

VIO

RED

FIELD INSTALLED

MAX LOAD-5VA SEALED

10VA INRUSH

A2A1

CWP

1

A2A1

CWP

2

BRN

CWP1

A2

MLV-A

GRA

BRN

MLV ACCSY

FR4

2

4

FR3

2

4

FR2

2

4

TAN

TAN

PNK

FR1

2

4

TAN

PNK

PNK

A2A1

BRN

PNK

FC2

A2

FC3

(055,060 ONLY)

RED

RED

4

TB4

ORN

RED

ACCESSORY
STORAGE TANK
HEATER RELAY

TNK

R

BLK

ORN

BRN

C

TB1

BRN

CWP2

A2

BRN

C

TB1

BRN

CA1

A2

BRN

CA2

A2

BRN

C

TB1

BRN

CB1

A2

BRN

CB2

A2

BRN

C

TB1

BRN

CWP1

A2

BRN

FC2

A2

BRN

CA2

A2

BRN

FC1

A2

BRN

FC3

A2

14

15

4

3

12

13

6

5

11

RED

RED

BLU

BLU

DLS STEP 2

DLS STEP 1

LVT

16

17

2

1

GRA

GRA

ICE DONE

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

BLK

RED

EVAPORATOR ENTERING
FLUID TEMP

BLK

RED

EVAPORATOR LEAVING
FLUID TEMP

SPACE TEMPERATURE
ACCESSORY OR
DUAL CHILLER LWT

3

4

4

3

2

2

1

1

BLK

WHT

RED

J3

14

13

RED

CWP2

RED

14

13

VIO

CWP1

VIO

BRN

VIO

BR

HR

ALMR

HEAT/BOILER FIELD

INSTALLED WIRING

RED

C1

A1

B1

OFF

3

2

16

13

6

4

15

7

5

17

9

8

14

REMOTE
ON-OFF
SWITCH

(SEE NOTE

5)

ENABLE

SW1

LVT

ORN

12

11

13

11

14

CWFS

DUAL

SETPOINT

LVT

7

6

19

20

GRA

TAN

RED

RED

RED

GRA

GRA

SEE

NOTE 9

(055,060 ONLY)

(055,060 ONLY)

(055,060 ONLY)

(055,060 ONLY)

SEE NOTE 8

LVT

5

21

BRN

FR110

ORN BRN

(055,060 ONLY)

FR210

GRA BRN

(055,060 ONLY)

FR310

VIO BRN

(055,060 ONLY)

FR410

PNK BRN

(055,060 ONLY)

MP-B1

VIO

VIO

PL2-2PL2-1

VIO

MP-A1

VIO

VIO

PL1-2PL1-1

VIO

MP-B2

VIO

VIO

PL2-6PL2-5

VIO

MP-A2

VIO

VIO

PL1-6PL1-5

VIO

BLU

BLK

BLK

HPS-B

J12 T55

J13

J1

J12

J11

PL1-3

RED

RED

PL1-4

BRN

BRN

PL1-7

RED

RED

PL2-3

RED

RED

PL2-7

RED

RED

PL1-8

BRN

BRN

PL2-4

BRN

BRN

PL2-8

BRN

BRN

BRN

GRA

GRA

BLK

BLK

BLK

HPS-A

J10

J11

BLK

4

WHT

2

J12

CWPI

HEAT

J12

AUX

Fig. 7B — Typical Wiring Schematic, 30RAP035-060 Units — Control Wiring

a30-5284

27

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. 8 — Main Base Board

Fig. 9 — Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations

SPT (T10) PART NO. 33ZCT55SPT

SENSOR

SEN

SEN

LVT

3

4

Fig. 10 — Typical Space Temperature

Sensor Wiring

T-55 SPACE
SENSOR

CCN+

CCN GND

CCN-

TO CCN
COMM 1
BUS (PLUG)
AT UNIT

1

2

3

4

5

6

Fig. 11 — CCN Communications Bus Wiring

to Optional Space Sensor RJ11 Connector

a30-4967

a30-4968

28

Energy Management Module (Fig. 12) — This

factory-installed option (FIOP) or field-installed accessory is
used for the following types of temperature reset, demand
limit, and/or ice features:

• 4 to 20 mA leaving fluid temperature reset (requires
field-supplied 4 to 20 mA generator)

• 4 to 20 mA cooling set point reset (requires field­supplied 4 to 20 mA generator)

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

• 4 to 20 mA demand limit (requires field-supplied 4 to
20 mA generator)

• Discrete input for Ice Done switch (requires field­supplied dry contacts capable of handling a 24 vac,
50 mA load)

See Demand Limit and Temperature Reset sections on

pages 41 and 37 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.

Loss-of-Cooler Flow Protection — A proof-of-

cooler flow device is factory installed in all chillers. It is recom­mended that proper operation of the switch be verified on a reg­ular basis.

Electronic Expansion Valves (EXV) — All units are

equipped from the factory with EXVs. Each refrigeration cir­cuit is also supplied with a factory-installed liquid line filter
drier and sight glass.

The EXV is set at the factory to maintain 9° F (5.0° C) suc­tion superheat leaving the cooler by metering the proper
amount of refrigerant into the cooler. The superheat set point is
adjustable, but should not be adjusted unless absolutely
necessary.

The EXV is designed to limit the cooler saturated suction
temperature to 50 F (12.8 C). This makes it possible for unit to
start at high cooler fluid temperatures without overloading the
compressor.

Capacity Control — The control system cycles com-

pressors, digital scroll modulting solenoid (if equipped), and
minimum load valve solenoids (if equipped) to maintain the
user-configured leaving chilled fluid temperature set point. En­tering fluid temperature is used by the main base board (MBB)
to determine the temperature drop across the cooler and is used
in determining the optimum time to add or subtract capacity
stages. The chilled fluid temperature set point can be automati­cally reset by the return fluid 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 FIOP
or accessory).

The standard 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. If no compressors have been running
for more than 30 minutes and the leaving fluid temperature is
greater than the saturated condensing temperature, the wear
factor is still used to determine which compressor to start next.
If the leaving fluid temperature is less than the saturated con­densing temperature, then the control will start either compres­sor A1 or compressor B1 first, depending on the user-configu­rable circuit lead-lag value. For units with the minimum load
control valve, the A circuit with the minimum load valve is al­ways the lead circuit. The A circuit is also always the lead for
units with the digital compressor option. On units with the dig­ital scroll option, the A1 compressor operates continuously,
providing close leaving chilled water control. For this reason,
on/off cycling of the unit’s compressors is dramatically re­duced, which in turn reduces wear associated with compressor
start/stop cycles.

The EXVs will provide a controlled start-up. During start­up, the low pressure logic will be bypassed for 2
allow for the transient changes during start-up. As additional
stages of compression are required, the processor control will
add them. See Table 19.

If a circuit is to be stopped, the compressor with the lowest
wear factor will be shut off first except when a digital compres­sor is used. The digital compressor is always the last compres­sor to shut off.

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 fluid 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%). If installed, the minimum load
valve solenoid will be energized with the first stage of capacity.
Minimum load valve value is a fixed 30% in the total capacity
calculation. The control will also use the minimum load valve
solenoid as the last stage of capacity before turning off the last
compressor. A delay of 90 seconds occurs after each capacity
step change. Refer to Table 19.

MINUTES LEFT FOR START — This value is displayed
only in the network display tables (using Service Tool,
ComfortVIEW™ or ComfortWORKS
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
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.

1

/2 minutes to

®

software) and



OPT2



29

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. 12 — Energy Management Module

LEAD/LAG DETERMINATION — This is a configurable
choice and is factory set to be automatic for all units unless the
unit is equipped with a digital scroll compressor or minimum



load, then circuit A is lead (Configuration
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 oper-

OPT2 LLCS).

ating 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
Multiplier (Configuration

— The user configurable Deadband



SLCTZ.GN) has a default val-

ue 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. Figure 13 shows
how compressor starts can be reduced over time if the leaving
water temperature is allowed to drift a larger amount above and
below the set point. This value should be set in the range of 3.0
to 4.0 for systems with small loop volumes.

First Stage Override
the control will modify the routine with a 1.2 factor on adding

— If the current capacity stage is zero,

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

— The control prevents the capacity
stages from being changed when the leaving fluid temperature
is close to the set point (within an adjustable deadband) and
moving towards the set point.

Ramp Loading

tion



SLCTCRMP) limits the rate of change of leaving

fluid temperature. If the unit is in a Cooling mode and config-

— Ramp loading (Configura-

ured 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
leaving fluid 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.

Low Entering Fluid Temperature Unloading

— When the
entering fluid temperature is below the control point, the
control will attempt to remove 25% of the current stages being
used. If exactly 25% cannot be removed, the control removes
an amount greater than 25% but no more than necessary. The
lowest stage will not be removed.

Minimum Load Control
control valve is energized only when one compressor is run­ning on circuit A. If the close control feature is enabled the

— If equipped, the minimum load

minimum load control valve may be used as needed to obtain
leaving fluid temperature close to set point.

30