Carrier 48HG014, 48HG028, 50HG028, 50HG014, 48HG024 Controls Operation And Troubleshooting

...

Download

Page 1

48/50HG014-028

Single Package Large Rooftop Units

with

Comfort

Link™ Controls

Controls Operation and Troubleshooting

CONTENTS

SAFETY CONSIDERATIONS GENERAL MAJOR SYSTEM COMPONENTS

General Main Base Board (MBB) Economizer Control Board (ECB) Scrolling Marquee Display Board Addresses Control Module Communication

• RED LED

• GREEN LED

• YELLOW LED

Carrier Comfort Network Interface Field-Installed Accessories

• SPACE TEMPERATURE SENSOR (T55)

• SPACE TEMPERATURE SENSOR (T56)

• SPACE TEMPERATURE SENSOR (T58)

• SPACE TEMPERATURE SENSOR CALIBRATION

• ECONOMIZER

• POWER EXHAUST

• INDOOR AIR QUALITY

• SMOKE DETECTOR

• FILTER STATUS

• FAN STATUS

• ENTHALPY SENSORS

CONTROLS AND FUNCTIONS Marquee Display Usage Clearing Unit Alarms Service Test

OPERATION Unit Control Type (U.CTL) Occupancy Determination Indoor Fan Outdoor Fans Economizer Indoor Air Quality (IAQ) Power Exhaust Compressor Staging Heating (48HG Units)

• THERMOSTAT CONTROL

• SPACE SENSOR CONTROL

Heating (50HG Units)

• THERMOSTAT CONTROL

• SPACE SENSOR CONTROL

Cooling

• THERMOSTAT CONTROL

• SPACE SENSOR CONTROL

Space Temperature Sensor Calibration

and Trim

Alarm Handling TROUBLESHOOTING

Complete Unit Stoppage Single Circuit Stoppage Service Analysis Restart Procedure Alarms and Alerts

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

. . . . . . . . . . . . . . . . . . . . . . . . . 31-39

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

. . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . .1-11

. . . . . . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . 11-25

. . . . . . . . . . . . . . . . . . . . . . . . . 11

. . . . . . . . . . . . . . . . . . . . . . . 26

. . . . . . . . . . . . . . . . . . . . . . . . . 27

. . . . . . . . . . . . . . . . . . . . . . . . 31

. . . . . . . . . . . . . . . . . . . . . . . . . 31

• DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES

Thermistor Troubleshooting

• THERMISTOR/TEMPERATURE SENSOR CHECK

Transducer Troubleshooting START-UP APPENDIX A — CCN TABLES CONTROL SET-UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-43

. . . . . . . . . . . . . . . . . . . . . 39

. . . . . . . . . . . . . . . . . . . . 39

. . . . . . . . . . . . . . . . 44-52

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained personnel can perform the basic maintenance functions of replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply. Follow all safety codes. Wear safety glas ses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.

GENERAL

This publication contains Start-Up, Controls, Operation,

and Troubleshooting information for the 48/50HG rooftop units. See Table 1. These units are equipped with ComfortLink controls.

Table 1 — Unit Sizes (48/50HG)

UNIT MODEL NOMINAL TONS

48/50HG014

48/50HG016 48/50HG020 48/50HG024 48/50HG028

MAJOR SYSTEM COMPONENTS

General —

electric cooling and with gas heating (48HG units) or electric cooling and electric heating (50HG Units) contain the ComfortLink electronic control system that monitors all operations of the rooftop. The control system is composed of several components as listed in sections below. See Fig. 1-3 for the control and power schematics. Figure 4 shows the layout of the control box, unit, and thermistor and transducer locations.

Main Base Board (MBB) —

the center of the ComfortLink control system. It contains t he major portion of the operating software and controls the operation of the unit. The MBB continuously monitors input/output channel information received from its inputs and from the Economizer Control Board (ECB). The MBB receives inputs

The 48/50HG single package rooftop units with

See Fig. 5. The MBB is

Page

. . . . . . . . . .CL-1, CL-2

15 18 20 25

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

Book 1144 Tab 1a1b6a6b

PC 111 Catalog No. 534-80090 Printed in U.S.A. Form 48/50HG-2T Pg 1 202 10-01 Replaces: 48/50HG-1T

Page 2

from thermistors T1 through T5 and transducers T6 through T8. See Table 2. The MBB also receives the Current Sensor inputs for compressors A1, B1 and C1 and other discrete or digital inputs. See Table 3. The MBB reads space temperature (SPT) from either a T55, T56 or T58 device and space temperature offset (SPTO) from a T56 device. See Table 4 and FieldInstalled Accessories section below. The MBB controls 11 relays. See Table 5.

Economizer Control Board (ECB) —

trols the economizer actuator. See Fig. 6. Relay 6 on the ECB supplies 24 VAC to the actuator. The control signal from the ECB uses the Belimo communication protocol. The ECB has inputs for Indoor Air Quality (IAQ), Outdoor Air Quality (OAQ), and enthalpy. See Table 4. It also controls two power exhaust motors (PE1 and PE2). See Table 5.

By communicating with the ECB, the e conomizer actuator is able to provide the damper position and diagnostic information to the ComfortLink controller. The damper position is displayed as EC.AP under Outputs/Econ on the Scrolling Marquee. Diagnostic information is displayed via Alert T414. More information about these alarms is contained in the Alarms and Alerts section.

Scrolling Marquee Display —

pad interface used to access rooftop information, read sensor values, and test the unit. See Fig. 7. The marquee display is a 4-key, 4-character, 16-segment LED (light-emitting diode) display. Eleven mode LED s are located on the display as well as an Alarm Status LED. See Marquee Di splay Usage se ction on page 11 for further details.

Board Addresses —

a 3-position instance jumper that is set at the factory to “1.” Do not change this setting. The ECB has a 4-position DIP switch. Each DIP switch is s et to “0” at the factory. Do not change this setting.

The Main Base Board (MBB) has

The ECB con-

This device is the key-

Control Module Communication

RED LE D — Proper operation of the control boards can be visually checked by looking at the red status LEDs. When operating correctly, the red status LEDs should blink 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. Also, be sure that the Main Base Board is supplied with the current software. If necessary, reload current software. If the problem still persists, replace the MBB. A board LED that is lit continuously or blinking at a rate of once per second or faster indicates that the board should be replaced.

GREE N 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 that will blink whenever power is on. If LE N LED is not blinking, check LEN connections for potential communication errors (J3 and 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.

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

Carrier Comfort Network Interface —

units can be connected to the CCN if desired. The communication bus wiring is a shielded, 3-conductor cable with drain wire and is field supplied and installed. See T able 6 for wiring information. The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each

The 48/50HG

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 TB2. See Fig. 1 and 2. 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. See Table 6.

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 communic ation 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.)

3. Connect the red wire to (+) terminal on TB2 of the plug, the white wire to COM terminal, and the black wire to the (–) terminal.

4. The RJ14 CCN connector on TB2 can also be used, but is only intended for temporary connection (for example, a laptop computer running Service Tool).

5. Restore power to unit.

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 probl ems with all sys tem elem en ts on th e bu s.

Field-Installed Accessories

SPACE TEMPERATURE SENSOR (T55) — The T55 Space Temperature Sensor (Part No. CEC0121448-01) is a fieldinstalled accessory. The sensor is installed on a building interior wall to measure room air temperature. T he T55 sensor a lso includes an override button on the front cover to permit occupants to override the Unoccupied Schedule (if programmed). The jumper wire in the inst aller’s packet must be connected between R and W1 when using a T55 device. See Fig. 8-10.

SPACE TEMPERATURE SENSOR (T56) — The T56 Space Temperature Sensor (Part No. CEC0121503-01) is a fieldinstalled accessory. This sensor includes a sliding scale on the front cover that permits an occupant to adjust the space temperature set point remotely. The jumper wire in the installer’s packet must be connected between R and W1 when using a T56 device. See Fig. 8, 9, and 11.

Page 3

Fig. 1 — Low Voltage Control Schematic — 48HG Units

Page 4

Fig. 2 — Low Voltage Control Schematic — 50HG Units

Page 5

Fig. 3 — Typical Power Schematic

Page 6

THERMOSTAT/IGC MARKINGS

NOTES:

1. Factory wiring is in accordance with the National Electrical

Te r m i na l B l oc k

TB —

Codes. Any field modifications or additions must be in com-

pliance with all applicable codes.

2. Use 75° C min wire for field power supply. Use copper wires

Blower Motor

Common

Inducer Motor

BM —

C—

CM —

Transformer

Room Temp Device

Room Temp Device with Set

TRAN —

T- 55 —

T- 56 —

for all units.

3. All circuit breakers Must Trip Amps are equal to or less than

Centrifugal Switch

Fan

Indoor Fan On

CS —

G—

IFO —

Point Adjustment

Te r m i na l B l oc k

156% RLA.

phase motors protected against primar y single-phase

4. Compressor and fan motors are thermally protected. Three-

Line 1

Thermostat Power

Power Supply

L1 —

R—

RT —

Terminal (Unmarked)

conditions.

5. Red jumper wire must be added between R and W1 for

Speed Sensor

Thermostat Heat

SS —

W—

Terminal (Marked)

Splice

Space Temperature mode and temporarily during Service-

Test mode when the heaters need to operate.

1st Stage of Heating

2nd Stage of Heating

W1 —

W2 —

Factory Wiring

Alarm Output

1st Stage of Cooling

2nd Stage of Cooling

X—

Y1 —

Y2 —

Field Wiring

To indicate common potential

only, not to represent wiring.

To indicate FIOP or Accessory

Fig. 4 — Typical Component Arrangement

Induced-Draft Motor

Indoor-Fan Contactor

Indoor-Fan Circuit Breaker

Indoor-Fan Motor

Integrated Gas Controller

Local Equipment Network

Limit Switch

Main Base Board

Outdoor-Air Quality

Outdoor-Air Temperature

Outdoor-Fan Contactor

Outdoor-Fan Motor

Power Exhaust Contactor

Power Exhaust Motor

Plug

Quick Connect

Quadruple Terminal

Rollout Switch

Supply-Air Temperature

Saturated Condensing Temp

QC —

QT —

RS —

Fuse

Ground

Gas Valve

FU —

GND —

GV —

Saturated Suction Pressure

SAT —

SCT —

SSP —

High-Pressure Switch

Ignitor

Indoor-Air Quality

HPS —

I—

IAQ —

LEGEND FOR FIG. 1 TO 4

IDM —

IFC —

IFCB —

IFM —

IGC —

LEN —

LS —

MBB —

OAQ —

OAT —

OFC —

OFM —

PEC —

PEM —

PL —

Circuit A

Auxiliary Contact

Circuit B

Circuit C

Compressor, Contactor

Capacitor

Circuit Breaker

Carrier Comfort Network

Crankcase Heater

Compressor

Current Sensor

Enthalpy Control

Economizer Control Board

Factory-Installed Option

Flame Sensor

---.A —

AUX —

---.B —

---.C —

C—

CAP —

CB —

CCN —

CCH —

COMP —

CS —

EC —

ECB —

FIOP —

FS —

Page 7

RED LED - STATUS GREEN LED -

LEN (LOCAL EQUIPMENT NETWORK)

CEPL130346-01

YELLOW LED CCN (CARRIER COMFORT NETWORK)

INSTANCE JUMPER

SENSOR

OAT (T1)

SAT (T2)

SCT_A

(T3)

SCT_B

(T4)

SCT_C

(T5)

SSP_A

(T6)

SSP_B

(T7)

SSP_C

(T8)

LEN

STATUS

CCN

Fig. 5 — Main Base Board

Table 2 — Thermistor and Transducer Designations

CONNECTION

POINT

J8 — 5,6 (MBB) Outside Air Temperature (OAT) — Attached to the economizer support

J8 — 7,8 (MBB) Supply Air Temperature (SAT) — Inserted into the heat section under-

J8 — 9,10 (MBB) Saturated Condensing Temperature for Cir. A (SCT_A) — Circuit A

J8 — 11,12 (MBB) Saturated Condensing Temperature for Cir. B (SCT_B) — Circuit B

J8 — 13,14 (MBB) Saturated Condensing Temperature for Cir. C (SCT_C) — Circuit C

J8 — 18,19,20 (MBB) Saturated Suction Pressure for Cir. A (SSP_A) — Suction line of Circuit A

J8 — 21,22,23 (MBB) Saturated Suction Pressure for Cir. B (SSP_B) — Suction line of Circuit B

J8 — 24,25,26 (MBB) Saturated Suction Pressure for Cir. C (SSP_C) — Suction line of Circuit C

bracket, behind the control box, inside the outside air duct of the economizer.

neath the indoor fan motor

condenser hairpin

in compressor compartment

FUNCTION AND LOCATION PART NO.

Thermistors

Transducers

J10

HH79NZ016

HH79NZ079 (48HG Units) HH79NZ084 (50HG Units)

HH79NZ003

HK05YZ001

Page 8

Table 3 — Discrete or Digital Inputs

INPUT

Compressor

Current Sensor A1

Compressor

Current Sensor B1

Compressor

Current Sensor C1

Filter Status

Fan Status

Y2 W1 W2

Fan Feedback

Shutdown

Enthalpy

CONNECTION

POINT

J9 — 10,11,12 (MBB) —

TERMINAL

CONNECTION

POINT

COMMENT

Part No. = HK50AA035

J9 — 7,8,9 (MBB) —

J9 — 4,5,6 (MBB) —

J9 — 2,3 (MBB) TB3 — 14,16 Part No. = HK06WC029

J8 — 15,16 (MBB) TB3 — 11,12 Part No. = HK06WC028

J7 — 10 (MBB) TB4 — 2 Thermostat Y1 (1

J7 — 8 (MBB) TB4 — 3 Thermostat Y2 (2 J7 — 6 (MBB) TB4 — 4 Thermostat W1 (1 J7 — 4 (MBB) TB4 — 5 Thermostat W2 (2

Stage Cooling)

Stage Heating)

J7 — 2 (MBB) TB4 — 6 Thermostat G (Fan)

J7 — 4 (MBB) —

Senses when the indoor fan contactor coil is being energized

J6 — 5, 6 (MBB) TB3 — 5,6 Request Unit Shutdown via smoke detector, etc.

J5 — 4 (ECB) TB5 — 1,4 Part No. = HH57AC077

Fig. 6 — Economizer Control Board

Page 9

Table 4 — Additional Analog Inputs

Fig. 7 — Scrolling

Comfort

Link™ Display

INPUT

Space Temperature (SPT)

T55

T56

Space Temperature (SPT) and Space

Temperature Offset (SPTO)

Indoor Air Quality (IAQ)

Outdoor Air Quality (OAQ)

LEGEND

ECB — MBB —

Economizer Control Board Main Base Board

Table 5 — Main Base Board and Economizer Control Board Outputs

OUTPUT

C.A1 C.B1 C.C1

IFC

Fan Power

OFC1 OFC2 OFC3

W1 W2

ALARM

Economizer Power

Economizer Control Signal

PE_1 PE_2

CONNECTION

POINT

TERMINAL

CONNECTION

POINT

COMMENT

J8 — 1,2 (MBB) TB3 — 7,8 Part No. = CEC0121448-01

J8 — 1,2,3 (MBB) TB3 — 7,8,9 Part No. = CEC0121503-01

J5 — 2,3 (ECB) TB5 — 2,3 Part No. = CRCBDIOX001A00 J5 — 3,5 (ECB) TB5 — 3,4 Part No. = CRCBDIOX001A00

CONNECTION

DESCRIPTION

POINT

J10 — 11 (MBB) First compressor of Circuit A J10 — 9 (MBB) First compressor of Circuit B J10 — 6 (MBB) First compressor of Circuit C J10 — 21 (MBB) Request for indoor fan. IGC controls the Indoor Fan Motor (48HG only) J10 — 3 (MBB) Allows indoor fan to operate J10 — 19 (MBB) Controls outdoor fan motor 1 J10 — 16 (MBB) Controls outdoor fan motor 3 and 6 (also 2 and 5 on size 028 units) J10 — 13 (MBB) Controls outdoor fan motor 4 J10 — 27 (MBB) Request for first stage of heating. IGC controls heating (48HG only). J10 — 25 (MBB) Second stage of heating. J10 — 23 (MBB) TB4 — 7,8 J8 — 18 (ECB) ECB can turn off the power to the actuator J7 — 1, 3 (ECB) Belimo Communication Protocol J8 — 3 (ECB) Power Exhaust Motor No. 1 J8 — 6 (ECB) Power Exhaust Motor No. 2

ECB — IFC — IGC — MBB — OFC —

Economizer Control Board Indoor-Fan Contactor Integrated Gas Controller Main Base Board Outdoor-Fan Contactor

Table 6 — CCN Communication Bus Wiring

LEGEND

MANUFACTURER PART NO.

Alpha

American

Belden

Columbia

2413 or 5463

A22503

8772

02525

MODE

Run Status Service Test

Temperature

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

Alarm Status

ESCAPE

ENTER

Page 10

SW1

SEN

RED(+)

WHT(GND)

BLK(-)

CCN COM

Cool

Warm

Fig. 8 — Space Temperature Sensor

(P/N CEC0121503-01 Shown)

BLK (GND)

RED (SPT)

SENSOR WIRING

Fig. 10 — T55 Space Temperature Sensor Wiring

(P/N CEC0121448-01)

RED(+)

WHT(GND)

BLK(-)

CCN COM

NOTE: Dimensions are in inches.

Fig. 9 — Space Temperature Sensor Mounting

SET

SEN

SW1

WHT

(T56) BLK (GND) RED (SPT)

Cool Warm

Fig. 11 — T56 Space Temperature Sensor Wiring

(P/N CEC0121503-01)

SENSOR WIRING

JUMPER TERMINALS AS SHOWN

Page 11

SPACE TEMPERATURE SENSOR (T58) — T h e T58 Space

ESCAPE

ENTER

Temperature Sensor (Part No. CEPL130464-01) is a fieldinstalled accessory. The T58 sensor communicates with the ComfortLink™ controller, providing space temperature, heating and cooling set points, and mode operation information. The jumper wire in the installer’s packet must be connected between R and W1 when using a T58 device.

IMPORTANT: A T58 sensor can only be used with unit running Version 2.0 or higher of the unit software. If a T58 sensor is installed but will not function with the 48/ 50HG unit, check the unit software version with the ComfortLink controls. The new version of the software may need to be loaded into the unit controls.

SPACE TEMPERATURE SENSOR CALIBRATION — The temperature reading of th e space tempe rature sensors can be calibrated. Refer to the Space Temperature Sensor Calibration and Trim section on page 31 for more information.

ECONOMIZER — The economizer accessory (Part No. CRECOMZR009A00) is a field-installed accessory. When installing this accessory, the unit must be configured for economizer installation by setting EC.EQ to YES. The default settin gs for the other economizer configurations should be satisfactory. If they need to be changed, additional information about these configuration settings can be found in the Ec onomizer section.

POWER EXHAUST — The power exhaust accessories (Part No. CRPWREXH018A00, CRPWREXH019A00, CRPWREXH020A00) are field-installed accessories for power exhaust for different voltages. When installing this accessory, the unit must be configured for power exhaust installation by setting PE.EN to YES. The default settings for the other power exhaust configurations should be satisfactory. If they need to be changed, additional information about these configurations can be found in the Power Exhaust section.

INDOOR AIR QUALITY — The indoor air quality (IAQ) accessory (Part No. CRCBDIOX001A00) is a field-installed accessory. This sensor measures CO return. The defaults for IAQ configurations should be satisfactory; however, if they are not, additional information about these configurations can be found in the I ndoor Air Quality section.

SMOKE DETECTOR — The smoke detector accessory (Part No. CRSMKDET001A00) is a field-installed accessory. This accessory detects smoke in the return duct. When installing this accessory, set the switch configuration to normally open or normally closed as wired (FS.SW). Normally closed (2) is the preferred configuration.

FI LTER STATUS — The filter status accessory (Part No. CRSTATUS002A00) is a field-installed accessory. This accessory detects plugged filters. When installing this accessory, set the switch configuration to normally open or normally closed as wired (FL.SW). Normally open (1) is the preferred configuration.

FAN S TATUS — The fan status accessory (Part No. CRSTATUS003A00) is a field-installed accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, set the switch configuration to normally open or normally closed as wired (FN.SW). Normally open (1) is the preferred configuration.

ENTHALPY SENSORS — The enthalpy accessories (Part No. CRENTSNG001A00 or CRDENTDIF001A00) are f ieldinstalled accessories. The first accessory (outdoor air only) determines when the enthalpy is low relative to a fixed reference. The second accessory (outdoor and return enthalpy are measured) compares the enthalpy between the outdoor and return airstreams. In each case, the enthalpy 4-20mA signals are converted to a switch output which i s read by the ECB. When installing this accessory, set the switch configuration to normally open or normally closed as wired (EN.SW). Normally open (1) is the preferred configuration.

concentrations in the unit

CONTROLS AND FUNCTIONS

Marquee Display Usage —

The display module provides the user interface to the ComfortLink control system. The display has up and down arrow keys, an key, and an key. These keys are used to navigate through the different levels of the display structure. See Table 7. Press the key until the display is blank to move through the top 11 mode levels indicated by LEDs on the left side of the display.

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

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

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

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

item, value, or units display will resume. Repeat the process as required for other items. See Tables 7-21 for further details.

ESCAPE ENTER

ENTER

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

key to accept it. Press the key and the

Clearing Unit Alarms —

through the ComfortLink display. To check the current alarms, enter into the Alarms menu. The first submenu is the CURR submenu. The CURR function displays the list of current alarms (maximum of 25). The second submenu item is the R.CUR (Reset Current Alarms) function. Press to reset the current alarms. The next submenu item, HIST, displays the list of cleared alarms (maximum of 20). The HIST function can be cleared with the R.HIS function. See Tables 21 and 22.

→

ECONOMIZER CALIBRATION — Because of a mechanical problem with the economizer, the actuator might acquire a new degree of rotation which is less than 90 degrees. If this occurs, a “T414 Economizer Damper Actuator Out of Calibration” alert will be generated. The economizer calibration procedure (E.CAL under the INDP submenu) will reconfigure the actuator to the new fully closed and fully open positions. To implement the calibration procedure, change E.CAL from OFF to ON. E.CAL will remain ON as long as the calibration procedure is being implemented (as long as 5 minutes). During th e calibration procedure the actuator will close fully and then open fully. After the calibration is complete, the degree of rotation should be greater than 90 degrees, causing the T414 alarm to clear. If the T414 alert does not clear, check th e economiz er damper for other mechanical problems.

See Fig. 7 and T ables 7-21.

ESCAPE

ENTER

ESCAPE

The unit alarms can be cleared

ENTER

202

Page 12

Service Test —

The Service Test function can be used to verify proper operation of compressors, indoor, outdoor and power exhaust fans, heaters, economizer and alarm relay. The Service Test function can also be used to calibrate the economizer. Refer to Table 9. Use the display keys to enter the mode and display TEST. Pr ess twice so that OFF flashes.

ENTER En ter the password i f required (1111 default). Use either arrow key to change the TEST value to the ON position and press

ENTER

Press and the button to enter the INDP, FANS,

. By selecting ON, Service Test mode is now enabled.

ESCAPE

COOL or HEAT submodes.

Of these four submodes, only INDP is independent, and therefore only its items can be changed at any time without affecting the performance of other items (FANS, COOL or HEAT submodes). For exampl e, if A1 was selected from the COOL submode, compressor A1 would operate with the indoor fan and necessary outdoor fans. If ECON (part of INDP) was changed, the performance of t he COOL outputs would not be affected. However, if the user selected IDF from FANS, all of the outputs currently operat ing beca use of A1, including IDF, would be turned off and then IDF would be

→

Table 7 — Marquee Display Menu Structure

turned on again after a small delay. The ECON settin g, as a member of INDP , w ould not be affected.

This system of dependent and independent submodes was developed to ensure that the indoor and outdoor fans were adequately controlled at all times. It wa s also implemented to make sure that certain outputs, which could cause the MCA (Minimum Current Amps) and the MOCP (Maximum Overcurrent Protection) of the unit to be exceeded, do not operate at the same time.

The INDP submode can used to test the system outputs that are independent and can operate in all modes: fan only, cooling and heating. These outputs are ECON, E.PWR, PE.1, PE.2 and ALM.

When an economizer output (ECON) other than zero is selected, the economizer power relay E.PWR will automatically be turned ON and the economizer is moved to the selected position. Afterwards, the user can turn off the power to the economizer by setting E.PWR to OFF. However, this will not turn off ECON. If the user reselects ECON, the economizer power relay will once again be turned ON.

Text continues on page 25.

RUN

STATUS

Auto Display (VIEW)

Software

Ver si on (VERS)

Run Hours

(HRS)

Component

Cycles

(CYCS)

Comp/Heater

Timeguard

(TMGD)

SERVICE

TEST

Manual

Mode

On/Off

(TEST)

Test

Independent

Outputs

(INDP)

Test Fa ns

(FANS)

Test Cooling

(COOL)

Test Heating

(HEAT)

TEMPERATURES PRESSURES

Unit

Temperatures

(UNIT)

Circuit

Temperatures

(CIRC)

Calibrate

Temperatures

(CALB)

SET

POINTS

Cooling (COOL)

Heating (HEAT)

Supply Air

(SAT)

Heat-Cool

Set Point

Gap

(HC.SG)

INPUTS OUTPUTS

Thermostat

Inputs

(STAT)

Switch

Inputs

(SW.IN)

IAQ Inputs

(AQ.IN)

Compressor

Current Sensor (CS.IN)

Fans

(FANS)

Compressor

(CMPR)

Heat

(HEAT)

Economizer

(ECON)

CONFIGURA-

TION

Unit

Configuration

(UNIT)

Cooling

Configuration

(COOL)

Heating

Configuration

(HEAT)

Economizer

Configuration

(ECON)

IAQ

Configuration

(IAQ)

CCN

Configuration

(CCN)

Display

Configuration

(DISP)

Alarm Output

Control (ALRM)

TIME

CLOCK

Time

(TIME)

Date

(DATE)

Daylight Savings

Config (DST)

Occupancy

Schedule

Number (SCH.N)

Override

Time

Limit

(OTL)

SPT

Override

Enabled?

(OVR.E)

Local

Occupancy

Schedule

(SCH.L)

Global Holidays (HOL.G)

Local

Holiday

Schedule

(HOL.L)

OPERATING

MODES

System

(SYS)

HVAC

(HVAC)

ALARMS

Current Alarms (CURR)

Reset Current Alarms

(R.CUR)

Alarm History

(HIST)

Reset

Alarm History (R.HIS)

202

Page 13

Table 8 — “Run Status” Mode and Submode Directory

SUBMODE

VIEW Auto View of Run Status

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION COMMENT

SAT XXX.X Supply Air Temperature

OCC YES/NO Currently Occupied

ALRM XX Current Alarms & Alerts

TIME XX.XX Time of Day 00.00 – 23.59

VERS Software Version Numbers

ENTER

MBB CESR131248-XX-XX

ECB CESR131249-XX-XX

MARQ CESR131171-XX-XX

HRS Component Run Hours

ENTER

A1 XXXX Comp A1 Run Hours

B1 XXXX Comp B1 Run Hours

C1 XXXX Comp C1 Run Hours

IDF XXXX Indoor Fan Run Hours

OFC.1 XXXX OD Fan Cont. 1 Run Hours

OFC.2 XXXX OD Fan Cont. 2 Run Hours

OFC.3 XXXX OD Fan Cont. 3 Run Hours

HTR.1 XXXX Heat Stage 1 Run Hours

HTR.2 XXXX Heat Stage 2 Run Hours

PE.1 XXXX Power Exhaust1 Run Hours

PE.2 XXXX Power Exhaust2 Run Hours

E.PWR XXXX Economizer Pwr Run Hours

ALM XXXX Alarm Output Run Hours

CYCS Component Cycles

ENTER

A1 XXXX Compressor A1 Cycles

B1 XXXX Compressor B1 Cycles

C1 XXXX Compressor C1 Cycles

IDF XXXX Indoor Fan Cycles

OFC.1 XXXX OD Fan Contact. 1 Cycles

OFC.2 XXXX OD Fan Contact. 2 Cycles

OFC.3 XXXX OD Fan Contact. 3 Cycles

HTR.1 XXXX Heat Stage 1 Cycles

HTR.2 XXXX Heat Stage 2 Cycles

PE.1 XXXX Power Exhaust 1 Cycles

PE.2 XXXX Power Exhaust 2 Cycles

E.PWR XXXX Economizer Power Cycles

ALM XXXX Alarm Output Cycles

TMGD Comp/Heater Timeguards

ENTER

TG.A1 XXX A1 Timeguard (secs)

TG.B1 XXX B1 Timeguard (secs)

TG.C1 XXX C1 Timeguard (secs)

TG.H1 XXX Heat 1 Timeguard (secs)

TG.H2 XXX Heat 2 Timeguard (secs)

Page 14

SUBMODE

TEST

INDP

FANS

COOL

HEAT

KEYPAD

ENTRY

ENTER

Table 9 — “Service Test” Mode and Submode Directory

ITEM DISPLAY ITEM EXPANSION COMMENT

ON/OFF Field Service Test Mode Use to Enable/Disable Manual Mode

Test Independent Outputs

ECON XXX Economizer Position Test %

E.PWR ON/OFF Economizer Power Test

E.CAL ON/OFF Calibrate Economizer

PE.1 ON/OFF Power Exhaust 1 Test

PE.2 ON/OFF Power Exhaust 2 Test

ALM ON/OFF Alarm Relay Test

Te s t F a n s

IDF ON/OFF Indoor Fan Test

IDFP ON/OFF Indoor Fan Power Test

OFC.1 ON/OFF Outdoor Fan Cntr 1 Test

OFC.2 ON/OFF Outdoor Fan Cntr 2 Test

OFC.3 ON/OFF Outdoor Fan Cntr 3 Test

Test Cooling

A1 ON/OFF Compressor A1 Test

B1 ON/OFF Compressor B1 Test

C1 ON/OFF Compressor C1 Test

Test Heating

HTR.1 ON/OFF Heat Stage 1 Test

HTR.2 ON/OFF Heat Stage 2 Test

SUBMODE

UNIT

CIRC

CALB

KEYPAD

ENTRY

ENTER

Table 10 — “Temperatures” Mode and Submode Directory

ITEM DISPLAY ITEM EXPANSION COMMENT

Unit Temperatures

SAT XXX.X Supply Air Temperature

OAT XXX.X Outdoor Air Temperature

SPT XXX.X Space Temperature

SPTO X.X Space Temperature Offset

Circuit Temperatures

SST.A XXX.X Saturated Suct Temp A Temperature is calculated

SCT.A XXX.X Saturated Cond Temp A

SST.B XXX.X Saturated Suct Temp B Temperature is calculated

SCT.B XXX.X Saturated Cond Temp B

SST.C XXX.X Saturated Suct Temp C Temperature is calculated

SCT.C XXX.X Saturated Cond Temp C

Calibrate Temperatures

SPT.C XXX.X Space Sensor Calibration

SPT.T XXX.X Space Temperature Trim

Enter either temperature or trim but not both

Page 15

Table 11 — “Pressures” Mode and Submode Directory

SUBMODE

COOL

HEAT

SAT

KEYPAD

ENTRY

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION COMMENT

SSP.A XXX.X Saturated Suct Press A

SCP.A XXX.X Saturated Cond Press A Pressure is calculated

SSP.B XXX.X Saturated Suct Press B

SCP.B XXX.X Saturated Cond Press B Pressure is calculated

SSP.C XXX.X Saturated Suct Press C

SCP.C XXX.X Saturated Cond Press C Pressure is calculated

Table 12 — “Set Points” Mode and Submode Directory

ITEM DISPLAY ITEM EXPANSION COMMENT

Cooling Set points

OCSP XX Occupied Cool Set point Default: 78

UCSP XX Unoccupied Cool Set point Default: 85

Heating Set points

OHSP XX Occupied Heat Set point Default: 68

UHSP XX Unoccupied Heat Set point Default: 60

Supply Air Set points

LCSP XX Low Cool SAT Set point Default: 65

HC.SG

SUBMODE

COOL

ENTER

KEYPAD

ENTRY

ENTER

ESCAPE

HCSP XX High Cool SAT Set point Default: 55

MIN.L XX.X Minimum SAT Lower Level Default: 48.0

MIN.H XX.X Minimum SAT Upper Level Default: 58.0

HC.SG XX Heat-Cool Set Point Gap Default: 5

Table 13 — Reading and Changing Cooling Occupied Set Point

ITEM DISPLAY ITEM EXPANSION COMMENT

OCSP 78 Occupied Cool Set point Default: 78

78 Scrolling Stops

78 Value flashes

Select 75

75 Change accepted

OCSP 75 Occupied Cool Set point Item/Value/Units scroll again

Page 16

Table 14 — “Inputs” Mode and Submode Directory

SUBMODE

STAT

SW.IN

AQ.IN

CS.IN

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION

Thermostat Inputs

Y1 ON/OFF Thermostat Y1 Input

Y2 ON/OFF Thermostat Y2 Input

W1 ON/OFF Thermostat W1 Input

W2 ON/OFF Thermostat W2 Input

G ON/OFF Thermostat G Input

Switch Inputs

FIL.S DRT/CLN Filter Status

FAN.S ON/OFF Fan Status

FDWN ON/OFF Unit Shutdown Input

ENTH HIGH/LOW Enthalpy Switch Input

RM.OC ON/OFF Remote Occupancy Input

IAQ Inputs

IAQ XXXX Indoor Air Quality

OAQ XXXX Outdoor Air Quality

Current Sensor Inputs

CS.A1 ON/OFF A1 Current Sensor

CS.B1 ON/OFF B1 Current Sensor

CS.C1 ON/OFF C1 Current Sensor

SUBMODE

FANS

CMPR

HEAT

ECON

Table 15 — “Outputs” Mode and Submode Directory

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION

Fan Outputs

IDF ON/OFF Indoor Fan

IDFP ON/OFF Indoor Fan Power

OFC.1 ON/OFF Outdoor Fan Contactor 1

OFC.2 ON/OFF Outdoor Fan Contactor 2

OFC.3 ON/OFF Outdoor Fan Contactor 3

Compressor Outputs

A1 ON/OFF Compressor A1

B1 ON/OFF Compressor B1

C1 ON/OFF Compressor C1

Heat Outputs

HTR.1 ON/OFF Heat Stage 1

HTR.2 ON/OFF Heat Stage 2

Economizer Outputs

EC.AP XXX Economizer Position

EC.CP XXX Economizer Commanded Pos

E.PWR ON/OFF Economizer Power

PE.1 ON/OFF Power Exhaust Relay 1

PE.2 ON/OFF Power Exhaust Relay 2

Page 17

SUBMODE

UNIT

COOL

KEYPAD

ENTRY

ENTER

Table 16 — “Configuration” Mode and Submode Directory

ITEM DISPLAY ITEM EXPANSION COMMENT

Unit Configuration

Default: 1

U.CTL X Unit Control Type

T.CTL X Thermostat Control Type

OC.FN YES/NO Fan On When Occupied Default: YES

S.DLY XXX Start Up Delay Default: 30 sec

IDF.F YES/NO Shut Down On IDF Failure Default: YES

FN.SW X Fan Status Input

FL.SW X Filter Status Input

FS.SW X Fire Shutdown Input

RM.SW X Remote Occupancy Switch

ECB YES/NO ECB Installed Default: YES

SAT.T XXX SAT Settling Time (Secs) Default: 240 sec

Cooling Configuration

N.CMP X Number of Compressors Default: 3 (016-024), 2 (014,028)

MC.LO XX Compressor Lockout Temp Default: 0° F

MRT.C XXX Compressor Min On Time Default: 180 sec

MOT.C XXX Compressor Min Off Time Default: 300 sec

CL.PD X.X SPT Cool Demand(+) Level Default: 1.0 ∆F

CL.ND X.X SPT Cool Demand (–) Level Default: –1.0 ∆F

C.LAG X.X Cool Thermal Lag Factor Default: 1.0 min

SA.PD X.X SAT Cool Demand (+) Level Default: 1.0 ∆F

SA.ND X.X SAT Cool Demand (–) Level Default: –1.0 ∆F

C.INC XXX Cool Stage Increase Secs Default: 450 sec

C.DEC XXX Cool Stage Decrease Secs Default: 300 sec

A.NOW YES/NO Alert Each Strike Default: YES

INV.E YES/NO Invert Evaporators Default: YES

A1.CS YES/NO A1 Current Sensing Default: YES

B1.CS YES/NO B1 Current Sensing Default: YES

C1.CS YES/NO C1 Current Sensing Default: YES

1 = Auto Select 2 = Thermostat 3 = Space Sensor

Default: 0 0 = Adaptive 1 = 1 Stage Y1 2 = 2 Stage Y1

Default: 0 0 = No Switch 1 = Normal Open 2 = Normal Close

Page 18

Table 16 — “Configuration” Mode and Submode Directory (cont)

SUBMODE

HEAT Heating Configuration

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION COMMENT

HT.TY X Type of Heat Installed

N.HTR X Number of Heat Stages Default: 2

HT.LO XX Heating Lockout Temp Default: 75 F

MRT.H XXX Heat Minimum On Time Default: 120 sec

MOT.H XXX Heat Minimum Off Time Default: 120 sec

HT.PD X.X SPT Heat Demand (+) Level Default: 1.0 ∆F

HT.ND X.X SPT Heat Demand (–) Level Default: –1.0 ∆F

H.LAG X.X Heat Thermal Lag Factor Default: 1.0 min

H.INC XXX Heat Stage Increase Secs Default: 450 sec

H.DEC XXX Heat Stage Decrease Secs Default: 300 sec

ECON Economizer Configuration

ENTER

EC.EQ YES/NO Economizer Equipped Unit Default: NO

MIN.P XXX Economizer Min Position Default: 30 %

ECL.H XX Econ High Temp Lockout Default: 65 F

ECL.L XX Econ Low Temp Lockout Default: 0° F

FC.EN YES/NO Unoccupied Free Cooling Default: Yes

EN.SW X Enthalpy Switch Input

PE.EN YES/NO Power Exhaust Control Default: NO

PE1.P XXX PE Stage1 Econo Position Default: 25 %

PE2.P XXX PE Stage2 Econo Position Default: 75 %

IAQ IAQ Configuration

ENTER

AQ.MP XXX Minimum IAQ Position Default: 10 %

MIN.P XXX Economizer Min Position Default: 30 %

AQD.L XXX AQ Differential Low Default: 100 PPM

AQD.H XXXX AQ Differential High Default: 700 PPM

I.4M XXXX IAQ Sensor Value at 4MA Default: 0 PPM

I.20M XXXX IAQ Sensor Value at 20MA Default: 2000 PPM

O.4M XXXX OAQ Sensor Value at 4MA Default: 0 PPM

O.20M XXXX OAQ Sensor Value at 20MA Default: 2000 PPM

OAQ.L XXXX OAQ Lockout Value Default: 600 PPM

CCN CCN Configuration

ENTER

CCN.A XXX CCN Address

CCN.B XXX CCN Bus Number

BAUD X CCN Baud Rate

B.TIM ON/OFF CCN Time/Date Broadcast Default: OFF

B.OAT ON/OFF CCN OAT Broadcast Default: OFF

B.GS ON/OFF Global Schedule Broadcast Default: OFF

B.ACK ON/OFF CCN Broadcast Ack’RDefault: OFF

Default: 0 0: No Heat 1: Gas 2: Electric

Default: 0 0: No Switch 1: Normal Open 2: Normal Close

Default: 1 Range: 1 to 239

Default: 0 Range: 1 to 239

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

Page 19

Table 16 — “Configuration” Mode and Submode Directory (cont)

SUBMODE

DISP Display Configuration

ALRM

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION COMMENT

METR YES/NO Metric Display

LANG X Language Selection

PROT ENBL/DSBL Password Protection Default = Disabled

PSWD XXXX User Password Default = 1111

TEST ON/OFF Test Display LEDs

Alarm Output Control

A.SPT YES/NO Space Sensor Failure Default: YES

A.SAT YES/NO SAT Thermistor Failure Default: YES

A.OAT YES/NO OAT Thermistor Failure Default: YES

A.CS YES/NO Current Sensor Failure Default: YES

A.CMP YES/NO Compressor Failure Default: YES

A.CKT YES/NO Refrig Circuit Failure Default: YES

A.SSP YES/NO SSP Transducer Failure Default: YES

A.SCT YES/NO SCT Ther mistor Failure Default: YES

A.FAN YES/NO Indoor Fan Failure Default: YES

A.FIL YES/NO Plugged Filter Default: YES

A.TST YES/NO Thermostat Failure Default: YES

A.ECO YES/NO Economizer Failure Default: YES

LEGEND

AQ — CCN — ECB — IAQ — OAQ —

Air Quality Carrier Comfort Network EconoMi$er Control Board Indoor-Air Quality Outdoor-Air Quality

OAT — PE — SAT — SCT — SPT —

Outdoor-Air Temperature Power Exhaust Supply Air Temperature Saturated Condensing Temperature Space Temperature

Default: NO YES = Metric NO = English

Default: 0 0 = English 1 = Espanol 2 = Francais 3 = Portuguese

SUBMODE

CCN

KEYPAD

ENTRY

ENTER

ESCAPE

ENTER

ESCAPE

Table 17 — Example of Changing the CCN Configuration

ITEM DISPLAY ITEM EXPANSION COMMENT

CCN.A 1 CCN Address Default: 1

1 Scrolling Stops

Value flashes

Select 2

Change accepted

CCN.A Item/Value/Units scroll again

CCN.B CCN Bus Number No change

BAUD CCN Baud Rate Default: 3 = 9600

3 Scrolling Stops

3 Value flashes

Select 5 = 38,400

5 Change accepted

BAUD 5 CCN Baud Rate Item/Value/Units scroll again

Page 20

Table 18 — “Time Clock” Mode and Submode Directory

SUBMODE

TIME

DATE

DST

SCH.N

OVR.E

OTL

SCH.L

SUB-SUB

MODE

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION COMMENT

TIME XX.XX Hour and Minute Military (00.00-23.59)

Current Date

MNTH XX Month of Year 1=Jan, 2=Feb, etc.

DOM XX Day of Month Range 1-31

YEAR XXXX Year

DAY XX Day of Week 1=Mon, 2=Tue, etc.

ENTER

Daylight Savings Config.

STR.M XX DST Start Month Default: 4

STR.W X DST Start Week Default: 1

STR.D X DST Start Day Default: 7

M.ADD XX DST Minutes to Add Default: 60

STP.M XX DST Stop Month Default: 10

STP.W X DST Stop Week Default: 5

STP.D X DST Stop Day Default: 7

M.SUB XX DST Minutes to Subtract Default: 60

ENTER

PER.1 Occupancy Period 1

ENTER

SCH.N XX Occupancy Schedule Num.

OVR.E YES/NO SPT Override Enabled Default: YES

OTL X Override Time Limit Default: 4

Local Occupancy Schedule

0 = Always Occupied 1 – 64 = Local Schedule 65 – 99 = Global Schedule

OCC.1 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.1 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

MON.1 YES/NO Monday In Period Default = No

TUE.1 YES/NO Tuesday In Period Default = No

WED.1 YES/NO Wednesday In Period Default = No

THU.1 YES/NO Thursday In Period Default = No

FRI.1 YES/NO Friday In Period Default = No

SAT.1 YES/NO Saturday In Period Default = No

SUN.1 YES/NO Sunday In Period Default = No

ESCAPE

PER.2 Occupancy Period 2

ENTER

HOL.1 YES/NO Holiday In Period Default = No

OCC.2 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.2 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

Page 21

Table 18 — “Time Clock” Mode and Submode Directory (cont)

SUBMODE

SCH.L

(cont)

SUB-SUB

MODE

PER.2

KEYPAD

ENTRY

ITEM DISPLAY ITEM EXPANSION COMMENT

MON.2 YES/NO Monday In Period Default = No

(cont)

TUE.2 YES/NO Tuesday In Period Default = No

WED.2 YES/NO Wednesday In Period Default = No

THU.2 YES/NO Thursday In Period Default = No

FRI.2 YES/NO Friday In Period Default = No

SAT.2 YES/NO Saturday In Period Default = No

SUN.2 YES/NO Sunday In Period Default = No

ESCAPE

PER.3 Occupancy Period 3

ENTER

HOL.2 YES/NO Holiday In Period Default = No

OCC.3 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.3 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

MON.3 YES/NO Monday In Period Default = No

TUE.3 YES/NO Tuesday In Period Default = No

WED.3 YES/NO Wednesday In Period Default = No

THU.3 YES/NO Thursday In Period Default = No

FRI.3 YES/NO Friday In Period Default = No

SAT.3 YES/NO Saturday In Period Default = No

SUN.3 YES/NO Sunday In Period Default = No

ESCAPE

PER.4 Occupancy Period 4

ENTER

HOL.3 YES/NO Holiday In Period Default = No

OCC.4 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.4 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

MON.4 YES/NO Monday In Period Default = No

TUE.4 YES/NO Tuesday In Period Default = No

WED.4 YES/NO Wednesday In Period Default = No

THU.4 YES/NO Thursday In Period Default = No

FRI.4 YES/NO Friday In Period Default = No

SAT.4 YES/NO Saturday In Period Default = No

SUN.4 YES/NO Sunday In Period Default = No

ESCAPE

PER.5 Occupancy Period 5

ENTER

HOL.4 YES/NO Holiday In Period Default = No

OCC.5 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.5 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

MON.5 YES/NO Monday In Period Default = No

TUE.5 YES/NO Tuesday In Period Default = No

WED.5 YES/NO Wednesday In Period Default = No

THU.5 YES/NO Thursday In Period Default = No

FRI.5 YES/NO Friday In Period Default = No

SAT.5 YES/NO Saturday In Period Default = No

Page 22

Table 18 — “Time Clock” Mode and Submode Directory (cont)

SUBMODE

SCH.L

(cont)

SUB-SUB

MODE

PER.5

KEYPAD

ENTRY

ITEM DISPLAY ITEM EXPANSION COMMENT

SUN.5 YES/NO Sunday In Period Default = No

(cont)

ESCAPE

PER.6 Occupancy Period 6

ENTER

HOL.5 YES/NO Holiday In Period Default = No

OCC.6 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.6 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

MON.6 YES/NO Monday In Period Default = No

TUE.6 YES/NO Tuesday In Period Default = No

WED.6 YES/NO Wednesday In Period Default = No

THU.6 YES/NO Thursday In Period Default = No

FRI.6 YES/NO Friday In Period Default = No

SAT.6 YES/NO Saturday In Period Default = No

SUN.6 YES/NO Sunday In Period Default = No

ESCAPE

PER.7 Occupancy Period 7

ENTER

HOL.6 YES/NO Holiday In Period Default = No

OCC.7 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.7 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

MON.7 YES/NO Monday In Period Default = No

TUE.7 YES/NO Tuesday In Period Default = No

WED.7 YES/NO Wednesday In Period Default = No

THU.7 YES/NO Thursday In Period Default = No

FRI.7 YES/NO Friday In Period Default = No

SAT.7 YES/NO Saturday In Period Default = No

SUN.7 YES/NO Sunday In Period Default = No

ESCAPE

PER.8 Occupancy Period 8

ENTER

HOL.7 YES/NO Holiday In Period Default = No

OCC.8 XX.XX Period Occupied Time Range: 00.00 to 23.59; Default: 00.00

UNC.8 XX.XX Period Unoccupied Time Range: 00.00 to 23.59; Default: 00.00

MON.8 YES/NO Monday In Period Default = No

TUE.8 YES/NO Tuesday In Period Default = No

WED.8 YES/NO Wednesday In Period Default = No

THU.8 YES/NO Thursday In Period Default = No

FRI.8 YES/NO Friday In Period Default = No

SAT.8 YES/NO Saturday In Period Default = No

SUN.8 YES/NO Sunday In Period Default = No

ESCAPE

HOL.8 YES/NO Holiday In Period Default = No

Page 23

Table 18 — “Time Clock” Mode and Submode Directory (cont)

SUBMODE

HOL.G

HOL.L

SUB-SUB

MODE

HOL.1 Holiday 1

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION COMMENT

HOL.G YES/NO Accept Global Holidays Default: YES

Local Holiday Schedule

MTH.1 XX Holiday Start Month Default: 0

DAY.1 X Holiday Start Day Default: 0

ESCAPE

HOL.2 Holiday 2

ENTER

LEN.1 XX Holiday Duration (Days) Default: 0

MTH.2 XX Holiday Start Month Default: 0

DAY.2 X Holiday Start Day Default: 0

ESCAPE

HOL.3 Holiday 3

ENTER

LEN.2 XX Holiday Duration (Days) Default: 0

MTH.3 XX Holiday Start Month Default: 0

DAY.3 X Holiday Start Day Default: 0

ESCAPE

HOL.4 Holiday 4

ENTER

LEN.3 XX Holiday Duration (Days) Default: 0

MTH.4 XX Holiday Start Month Default: 0

DAY.4 X Holiday Start Day Default: 0

ESCAPE

HOL.5 Holiday 5

ENTER

LEN.4 XX Holiday Duration (Days) Default: 0

MTH.5 XX Holiday Start Month Default: 0

DAY.5 X Holiday Start Day Default: 0

ESCAPE

HOL.6 Holiday 6

ENTER

LEN.5 XX Holiday Duration (Days) Default: 0

MTH.6 XX Holiday Start Month Default: 0

DAY.6 X Holiday Start Day Default: 0

ESCAPE

HOL.7 Holiday 7

ENTER

LEN.6 XX Holiday Duration (Days) Default: 0

MTH.7 XX Holiday Start Month Default: 0

DAY.7 X Holiday Start Day Default: 0

ESCAPE

HOL.8 Holiday 8

ENTER

LEN.7 XX Holiday Duration (Days) Default: 0

MTH.8 XX Holiday Start Month Default: 0

DAY.8 X Holiday Start Day Default: 0

ESCAPE

HOL.9 Holiday 9

ENTER

LEN.8 XX Holiday Duration (Days) Default: 0

ESCAPE

MTH.9 XX Holiday Start Month Default: 0

DAY.9 X Holiday Start Day Default: 0

LEN.9 XX Holiday Duration (Days) Default: 0

Page 24

Table 19 — Setting an Occupied Time Schedule – Weekdays Only for 7:30 to 22:30

SUBMODE

SCH.L

SUB-SUB

MODE

PER.1 OCC.1 Period Occupied Time

KEYPAD

ENTRY

ENTER

ITEM DISPLAY ITEM EXPANSION COMMENT

Local Occupancy Schedule

00.00 Scrolling stops

00.00 Hours Flash

07.00 Select 7

ENTER

07.00 Change accepted, minutes flash

07.30 Select 30

ENTER

ESCAPE

OCC.1 07.30 Period Occupied Time Item/Value/Units scrolls again

07.30 Change accepted

UNC.1 00.00 Period Unoccupied Time

ENTER

00.00 Scrolling stops

00.00 Hours Flash

22.00 Select 22

ENTER

22.00 Change accepted, minutes flash

22.30 Select 30

ENTER

ESCAPE

UNC.1 22.30 Period Unoccupied Time Item/Value/Units scrolls again

22.30 Change accepted

MON.1 NO Monday In Period

ENTER

NO Scrolling stops

YES Select YES

ENTER

ESCAPE

MON.1 YES Monday In Period Item/Value/Units scrolls again

YES Changed accepted

TUE.1 NO Tuesday In Period

ENTER

NO Scrolling stops

YES Select YES

ENTER

ESCAPE

TUE.1 YES Tuesday In Period Item/Value/Units scrolls again

YES Changed accepted

WED.1 NO Wednesday In Period

ENTER

NO Scrolling stops

YES Select YES

ENTER

ESCAPE

WED.1 YES Wednesday In Period Item/Value/Units scrolls again

YES Changed accepted

THU.1 NO Thursday In Period

ENTER

NO Scrolling stops

YES Select YES

ENTER

ESCAPE

THU.1 YES Thursday In Period Item/Value/Units scrolls again

YES Changed accepted

FRI.1 NO Friday In Period

ENTER

NO Scrolling stops

YES Select YES

ENTER

ESCAPE

FRI.1 YES Friday In Period Item/Value/Units scrolls again

YES Changed accepted

Page 25

Table 20 — “Operating Modes” Mode and Submode Directory

SUBMODE

SYS

HVAC

SUBMODE

CURR

R.CUR

HIST

R.HIS

SUBMODE

CURR

KEYPAD

ENTRY

KEYPAD

ENTRY

ENTER

KEYPAD

ENTRY

ENTER

ESCAPE

ITEM DISPLAY COMMENT

Item expansion changes as a function of system status Item expansion changes as a function of the HVAC status.

Table 21 — “Alarms” Mode and Submode Directory

ITEM ITEM EXPANSION COMMENT

AXXX or TXXX Currently Active Alarms

YES/NO Reset All Current Alarms

AXXX or TXXX Alarm History

YES/NO Reset Alarm History

Alarms are shown as AXXX Alerts are shown as TXXX

Table 22 — Example of Reading and Clearing Alarms

ITEM ITEM EXPANSION COMMENT

AXXX or TXXX

Active Alarms (AXXX) or Aler ts (TXXX) displayed

R.CUR

ENTER

NO Use to clear active alarms/alerts

NO NO Flashes

YES Select YES

NO Alarms/alerts clear, YES changes to NO

The FANS submode is used to test the IDF, IDFP, OFC.1, OFC.2 and OFC.3 variables. The IDF variable is used to force the IGC to turn on the indoor fan (48HG units only). The IGC closes a relay, which then supplies power to the IDFP relay. On 50HG units, the PL3 is jumpered by simulating a permanently closed IGC relay. The indoor fan power relay then is energized to close the IDF contactor. If IDFP is off, the indoor fan cannot operate. This enables the software to tu rn off the indoor fan power imme di at ely, even if an I G C is inst al led .

The COOL submode is used to test the compressors. In t h is mode, the user can turn on any combination of the three compressors. The software will stagger the compressor start-ups by 15 seconds. During Service Test, the compressor minimum off time is 30 seconds. While the compressors operate, the software will control the indoor and outdoor fans as necessary to maintain safe unit operation. All safeties are monitored while

the compressors operate and the safeties will turn a compressor, circuit or the unit off if required. If a compressor shuts down because of a safety, the software will set the compressor request (A1, B1 or C1) to OFF, forcing the user to reselect the compressor to re start the compress or in Service mode. All other menus are available during Service Test, enabling the user to watch temperatures and pressures while the compressors operate in Service mode.

In the HEAT submode, TB4-1 (R) must be connected to TB4-4 (W1) in order to operate the heaters. If the control mode is Thermostat Mode, remove the jumper after l eaving Service T est mode.

All outputs are turned off when the software transitions from TEST m o d e t o NO R M AL mode. To r e tu r n to NORMAL mode, set TEST to OFF.

Page 26

OPERATION

Unit Control Type (U.CTL) —

determined by Unit Control Type, which can be found in UNIT, a submode of Configuration. There are three available options that can be set from the Scrolling Marquee.

1. Auto (U.CTL = 1) — This mode selects the active mode by evaluating the devices connected to the unit. If a valid space temperature probe is connected t o the unit, the unit will operate in Space Sensor mode. If not, the unit will operate in Thermostat mode.

2. Thermostat (U.CTL = 2) — The unit determines cooling and heating demand by the state of G, Y1, Y 2, W1 and W2.

3. Space Sensor (U.CTL = 3) — The unit det ermines cooling or heating demand based on the space temperature and the appropriate set point.

The available set points are Occupied Cool Set Point (OCSP), Unoccupied Cool Set Point (UCSP), Occupied Heat Set Point (OHSP), and Unoccupied Heat Set Point (UHSP). The occupied or unoccupied heating set point should always be a minimum of 5 F below the corresponding cooling set point. This ensures that the unit does not switch from cooling to heating unnecessarily. The cooling and heating set point deadband can be changed (HC.SG).

Occupancy Determination —

mine whether the unit considers the building occupied or unoccupied. If the unit is operating with a space tempera ture probe (T55, T56 or T58), occupancy affects the unit set points and the operation of the economizer. If the unit is operating under thermostat control, occupancy only affects the operation of the economizer. The factors affecting occupancy are listed below from highest to lowest priority.

1. The CCN point OCCUPIED is forced via an external device such as a ComfortID ™ cont roller — Whe n O CCU PIED is forced to YES, the unit is considered occupied. When OCCUPIED is forced to NO, the unit is considered unoccupied. If OCCUPIED is not being forced, proceed to the level 2.

2. Remote Occupancy Switch is configured as Normally Open or Normally Closed — This switc h should b e configured to either Normally Open or Normally Closed when the user would like to control the occupancy with an external switch. There are three possible configurations for the remote occupancy switch: No Switch (0), Normally Open (1) or Normally Closed (2). This configuration is accessible on the display at Configuration/Unit/RM.SW. If the switch is configured to No Switch (0), the switch input value will be ignored and software will proceed to the level 3 priority. For each type of switch, the appropriate configuration and states are listed in the table below .

TYPE OF SWITCH

Occupied when

closed or Unoccupied

when open

Occupied when

open or Unoccupied

when closed

3. The following occupancy options are determined by the state of Occupancy Schedule Number (SCH.N) and the Global Schedule Broadcast (B.GS). The Schedule Number is a submode of Time Clock on the Scrolling Marquee

SWITCH

CONFIGURATION

Normal Open (1)

Normal Close (2)

The control method is

Many factors deter-

STATE OF

SWITCH AND STATE

OF OCCUPANCY

Open and Unoccupied

Closed and Occupied

Open and Occupied

Closed and Unoccupied

and Global Schedule Broadcast can be found on the Scrolling Marquee under Configuration/CCN.

a. SCH.N = 0: The unit is always considered occu-

pied and the programmed schedule is ignored. This is the factory default.

b. SCN.N = 1-64: Follow the local programmed

schedule. Schedules 1 to 64 are local within the controller. The Centurion unit can only store one local schedule and therefore changing this number only changes the title of the schedule table.

c. SCH.N = 65-99: Follow the global programmed

schedule. If the Centurion unit is configured as a Global Schedule broadcaster (B.GS = YES), the unit will follow the unit’s programmed schedule and broadcast the schedule so that other devices programmed to follow this schedule number can receive the schedule. If the Centurion unit is not programmed as a Global Schedule broadcaster (B.GS = NO), the unit will receive its information from the unit programmed to broadcast this schedule number.

Indoor Fan

48HG UN ITS — The indoor fan is controlled by three independent relays on a 48HG unit. The MBB fan relay is located on the MBB and signals the IGC to turn on the indoor fan. The IGC fan relay is located on the IGC and ca n operate independently of the MBB relay. When the IGC receives a request from the MBB rela y, t he IGC will turn on it s relay. The IGC will also turn on its relay when it determines that the indoor fan should be on for gas heating. The IGC fan relay supplies 24 volts to the final relay known as indoor fan power relay (IDFP), located on the MBB. This final relay supplies 24V t o the indoor fan contactor and to the indoor fan feedback input. Unless there is a problem, this relay will be closed. When the unit needs to shut down immediately because of a smoke problem, this relay will open. This allows the Centurion unit to turn off the indoor fan immediately even when the IGC is control ling the indoor fan. The fan feedback input allows the MBB to determine when the IGC has turned on the indoor fan. For indoor fan operation, see Indoor Fan Control section below.

50HG UNITS — Because a 50HG unit does not have an IGC, the indoor fan is controlled by the indoor fan rel ay (IDF) and the indoor fan power relay (IDFP) on the MBB. The IGC fan relay is replaced by a jumper wire on the 50HG unit. The indoor fan will operate whenever the IDF and the IDFP are closed. For indoor fan operation, see the Indoor Fan Control section below. Unless there is a problem, the IDFP relay will be closed. When the unit needs to shut down immediately because of a smoke problem, this relay will open.

INDOOR-FAN CONTROL (48HG AND 50HG UNITS) — In Space Temperature mode, the IDF relay will be on in the following situations. If the unit is in Occupied mode and the indoor fan is configured to always run while occupied (OC.FN = YES), the indoor fan will be ON. If OC.FN equals NO or the unit is unoccupied, the indoor fan will opera te only when heating or cooling is necessary.

In Thermostat mode, the IDF relay will be on in the following situatio n s. If G is On, then the I D F w ill be On. If the unit is in the Cool mode, the IDF will be on. If the unit is in the H eat mode for a 50HG unit, the IDF will be On. The unit will not turn on the IDF on a 48HG unit while in Heat mode (unless G is On) because the IGC is capable of controlling the indoor fan in this situation.

Page 27

Outdoor Fans —

The operation of the outdoor fans depends on the on/off status and discharge pressure, measured by the condensing temperature thermistors, of each circuit. Depending upon these values, the “fan level” for each circuit will be either 0, 1, or 2 as defined by Table 23. Fan level will increment when the discharge pressure is greater than the “On” level and decrement when the discharge pressure is less than the “Off” level. For example, if the discharge pressure starts at 90 psig for Circuit A, the fan level for Circuit A will be 0. When the pressure rises above 150 psig, the fan level will change from 0 to 1. Later, if the pressure drops below 0 psig, the fan level will return to 0. However, since the pressure cannot drop below 0 once the circuit is level 1, it will remain at least level 1 until the corresponding compressor is turned off.

Depending upon the fan level of each circuit, the unit will control the three outdoor fan contactors as specified in Table 24. If any circuit requires an outdoor fan contactor to be ON, then it will be ON even if another circuit does not require it to be ON. As shown in Fig. 3, OFC1 controls OFM1; OFC2 controls OFM2 (028 only), OFM3, OFM5 (028 only) and OFM6; and OFC3 controls OFM4. For example, if the fan levels for Circuits A and B are 0 and the fan level for Circuit C is 1, OFC1 and OFC3 will be energized.

Economizer —

If an economizer is installed, then Economizer Equipped configuration should be set to YES (EC.EQ). If the indoor fan is off or the building is unoccupied, the economizer position is zero. If in Occupied mode and the unit is heating or cooling and the economizer cannot provide free cooling, the economizer position is the Economizer Min Position (MIN.P) or the position specified by the IAQ algorithm. If in Unoccupied mode, the position is 0% open.

In cooling, the economizer will be allowed to help with cooling if the outdoor air temperature (OAT) is less than the economizer high temperature lockout (ECL.H). If an enthalpy sensor is installed, the outdoor temperature must be be low the economizer high temperature lockout temperature and enthalpy must be low. If the outdoor temperature is less than economizer low temperature lockout (ECL.L), the economizer will not provide free cooling.

If the unit is in cooling, operating under thermostat control, Y1 = ON, and the economizer is available for cooling, the economizer will control the supply air temperature to the low cool set point (LCSP). When Y2 = ON, the economizer will control the supply air temperature to high cool set point (HCSP).

If the unit is in cooling, operating under spac e temperature control, the economizer is available for cooling, and no compressors are operating, the economizer will control the SAT to either LCSP or HCSP (see Table 25). If a compress or is ON, the economizer will try to position itself at 100%.

If at any time there is a l o w suction pressure problem whil e the economizer is cooling, the maximum allowable economizer position will be reduced. The maximum values are 50, 25 and 0% for circuits A, B and C respectively. The maximum value will remain in effect until the compressor “in trouble” turns off. The effective maximum economizer position must always be higher than the current minimum position.

Table 23 — Outdoor Fan Level Transitions

FAN LEVEL

Lev1Off Lev1On Lev2Off Lev2On

CIRCUIT (PRESSURE) (psig)

ABC

000 150 150 150 100 100 100 200 200 200

Table 24 — Fan Level Control of

Outdoor Fan Contactors (1,2,3)

FAN L E V E L

0 1 2

ABC

———

131, 3

1, 2 2, 3 1, 2, 3

CIRCUIT

Table 25 — LCSP and HCSP Transitions for

Space Temperature Mode

CURRENT SAT

SET POINT

LCSP HCSP LCSP

LEGEND

Supply-Air Temperature

SAT —

Indoor Air Quality (IAQ) —

indoor air quality (IAQ) is measured using a CO

COOL DEMAND

∆∆∆∆

(

>0.5 HCSP

<0 LCSP

<–0.5 Exit Cooling

On the Centurion unit,

NEXT SAT

SET POINT

sensor whose

measurements are displayed in parts per million (PPM). The IAQ sensor can be field- or factory-installed in the return duct. If IAQ must be measured directly in the space instead of the unit return, a wall-mounted accessory can be field installed.

The Centurion unit’s indoor air quality algorithm modulates the position of the economizer damper between two user configurations depending upon the relationship between the IAQ and the Outdoor Air Quality (OAQ). The lower of these two positions is referred to as the Minimum IAQ Damper Position (AQ.MP) while the higher is referred as Economizer Minimum Position (MIN.P). The AQ.MP should be set to an economizer position that brings in enough fresh air to remove contaminants and CO The MIN.P should be set to an economizer position that brings in enough fresh air to remove contaminants and CO

generated by sources other than people.

generated

by all sources including people. The MIN.P value is the design value for maximum occupancy.

The ComfortLink™ control will begin to open the damper from the AQ.MP position when the IAQ level begins to exceed the OAQ level by a configurable amount, which is referred to as AQ Differential Low (AQD.L). If OAQ is not being measured, OAQ will be assumed to equal 400 PPM. When the differential between IAQ and OAQ reaches AQ Differential High (AQD.H), the economizer position will be MIN.P. When the IAQ/OAQ differential is between AQD.L and AQD.H, th e control will modulate the damper between AQ.MP and MIN.P in a linear manner as shown in Fig. 12 below. The damper position will never exceed the bounds specified by AQ.MP and MIN.P during IAQ control. If the building is occupied and the indoor fan is running and the differential between IAQ and OAQ is less than AQD.L, the economizer will remain at AQ.MP. The economizer will not close completely. The damper position will be 0 when the fan is not running or the building is unoccupied. The damper position may exceed MIN.P in order to provide free cooling.

The ComfortLink control is configured for air quality sensors which provide 4 mA at 0 PPM and 20 mA at 2000 PPM. If a sensor has a different range, these bounds must be reconfigured. The values for I.4M, I.20M, O.4M and O.20M on the display represent the PPM corresponding to 4 mA and 20 mA for IAQ and OAQ, respectively.

If OAQ exceeds the OAQ Lockout Value (OAQ.L), the economizer will remain at AQ.MP.

Page 28

ECONOMIZER MINIMUM DAMPER POSITION (MIN. P)

VENTILATION FOR PEOPLE

MINIMUM IAQ DAMPER POSITION (AQ.MP)

INCREASING VENTILATION

VENTILATION FOR SOURCES

100 500

AQ DIFFERENTIAL LOW (AQD.L)

→

Power Exhaust —

To enable power exhaust, PE.EN must be set to YES. If power exhaust is enabled, Power Exhaust 1 will turn on when the economizer position is greater than PE1.P. If power exhaust is enabled, Power Exhaust 2 will turn on when the economizer position is greater than PE2.P. There are small time delays to ensure that rapid cyc ling does not occur.

Compressor Staging —

The electronic controls determine the number of cooling stages neede d at any given time as specified in the Cooling section. However, which specific cooling stage operates at any given time depends on compressor staging order and compressor status.

COMPRESSOR ST AGI NG ORDER — T he 48/50HG016-024 units have three stages of cooling (Circuits A, B and C). The 48/50HG014 and 028 units have two stag es of cooling ( Circuits A and B). The position of the evaporators for Circuits A, B and C are bottom, mi ddle and to p (see Fig. 4 ) for a 3-ci rcuit unit. The position of the evaporators is bottom and top for Circuits A and B on a 2-circuit unit. Depending on conditions listed below, circuits will either stage from the bottom evaporator to the top evaporator (BtoT) or from the top evaporator to the bottom evaporator (TtoB). When the unit is staging TtoB, the unit is stated to be inverted.

If inverting is not allowed as determined by the configuration (INV.E = NO), the unit will always stage BtoT. However, if INV.E = YES, then the unit will invert if the outdoor temperature as measured by OAT is greater than 80 F for 15 minutes continuously. Inverting will continue until either INV.E is set to NO or the OAT drops below 75 F for 1 minute.

COMPRESSOR STATUS — Having determined whether staging will occur as either BtoT or TtoB, the unit controls will determine the final order of compressor staging. If all circuits are functioning properly, the compressor staging will always follow either BtoT or TtoB. Therefore if the staging method is BtoT, then Circuit A must turn On before Circuit B and Circuit B before Circuit C. Likewise when removing stages,

Fig. 12 — IAQ Control

700

1100

AQ DIFFERENTIAL HIGH (AQD.H)

INSIDE/OUTSIDE CO INSIDE CO

CONCENTRATION

DIFFERENTIAL

the stages must be removed in the opposite order. In all cases, the minimum on-time of 3 minutes (MRT.C) and the minimum off-time of 5 minutes (MOT.C) must be honored. Therefore, if the staging order is BtoT and Circuit A was shut down two minutes previously, no circuits will turn on until the minimum off-time for Circuit A has expired; no matter how many circuits are requested.

The rules are different if a circuit has shutdown because of an alarm such as low refrigerant pressure. When a circuit is unavailable because it is not functioning properly, it will be replaced immediately by another circuit. Therefore, if Circuit A and B are operating because two circuits have been requested, the staging is BtoT, and then Circuit A shuts down because of low refrigerant pressure, the control will turn off Circuit A and replace it with Circuit C. Later if Circuit A is allowed to restart (see Alarm Handling on page 31) and BtoT is still active with two requested stages, Circuit A will attempt to restart. If Circuit A has run for 1 minute without sensing any problems, it will be deemed acceptable, causing Circuit C to shutdown. Circuit C will shut down because only two circuits are needed and Circuit A and B are functioning properly.

Heating (48HG Units)

NOTE: THE 48HG units have 2 stages of heat.

For 48HG units, the heat type will automatical ly be set to 1 for gas units (HT.TY). Heat will not operate if the outdoor temperature is greater than the heat lockout temp (HT.LO).

THERMOSTAT CO NTROL — Wh en the thermostat calls for heating, the MBB senses that W1 is On and closes the HTR.1 relay. When the relay is closed, it sends power to W on the IGC (integrated gas unit controller) board. An LED (lightemitting diode) on the IGC board will be on during normal operation. A check is made to ensure that the rollout switch and limit switch are closed. The induced-draft motor is then energized. When speed is proven with the Hall Effect sensor on the motor, the ignition activation period begins.

202

Page 29

The burners will ignite within 5 seconds. If the burners do not light, there is a 22-second delay before another 5-second attempt. If the burners still do not light, this sequence is repeated for 15 minutes. After the 15 minutes have elapsed, i f the burners still have not ignited, heating is locked out. The control will reset when the request for heat is temporarily removed.

When ignition occurs, the IGC board will continue to monitor the condition of the rollout switch, limit switches, Hall Effect sensor, and the flame sensor. If the unit is controlled through a room thermostat set for fan auto, 45 seconds after ignition occurs the indoor-fan motor will be energized (and the outdoor-air dampers will open to their minimum position). If for some reason the overtemperature limit opens prior to the start of the indoor fan blower, on the next attempt, the 45-second delay will be shortened to 5 seconds less than the time from initi ation of heat to w hen th e limi t trip ped. Ga s will not be interrupted to the burners and heating will continue. Once modified, the fan on delay will not change back to 45 seconds unless power is reset to the control.

When additional heat is required and the MBB senses that W2 is On, the MBB closes the HTR.2 relay and sends power to the second stage of the main gas valve. If the thermostat removes the call for W2, the unit will turn off HTR.2 (minimum on-time 2 minutes [MRT.H], minimum off-time 2 mi nutes [MOT.H]). If W1 is satisfied, the main base board will open HTR.1 (minimum on-time 2 minutes and minimum off-time 2 minutes), interrupting the flow of gas to the main burners. The IGC also has a minimum on-time of 1 mi nute. Therefore, in modes such as Service Test where the long minimum on-time and off-times are not enforced, the one minute minimum on-time for the IGC will still be followed. If the unit is controlled through a room thermostat set for fan auto, the indoor-fan motor will continue to operate for an additional 45 seconds then stop. If the overtempera ture limit opens after the indoor motor is stopped within 10 minutes of W becoming inactive, on the next cycle the time will be extended by 15 seconds. The maximum delay is 3 minutes. Once modified, the fan off delay will not change back to 45 seconds unless power is reset to the control.

An LED indicator is provided on the IGC to monitor operation. The IGC is located by removing the heat section side panel. See Fig. 4. During normal operation, the LED is continuously on. See Ta ble 26 for error codes.

If the user has selected Adaptive (see Cooling section) for its thermostat mode, the algorithm will follow the configurable delays for adding and removing stages. When adding additional heat stages, the delay is measured from whe n the last stage was added (H.INC). When removing stages, the delay is measured from when the last stage was removed (H.DEC). Therefore, if W1 and W2 turn on simultaneously, the second stage will turn on after a H.INC delay.

NOTE: If the mode is not Adaptive, then there are no delays for adding and removing stages.

SPACE SENSOR CONTROL — During Space Sensor control, the electronic control uses information from the space sensor to determine the number of heat stages. Once the number of stages needed for heating is determined, this information is passed to the IGC by turning on either HTR.1 or HTR.1 and HTR.2. See Thermostat Control section for description of IGC operation.

NOTE: The jumper wire in the instal ler’s packer must be connected between R and W1 when using a T55, T56, or T58 device. See Fig. 1 and 2.

During Space Sensor control, two methods are used to add stages of heat and two methods are used to subtract stages of heat. The first method of adding and subtracting stages causes the unit to operate around its configured steady state number of stages. Fo r ex a m p le , if the correct numb er o f s t ag es is between 0 and 1, this method will cause the first stage to cycle. If the

correct number of stages is between 1 and 2, this method will cause the second stage to cycle.

The second method of adding and subtracting stages causes the unit to find the steady state number of stages. The first method will not add or remove a stage of heating unless the current Heat Demand (set point – SPT), corrected by the rate of change in the Heat Demand, is greater than Heat Demand Positive Level (HT.PD) or less than Heat Demand Negative Level (HT.ND). The correction term is the Heat Thermal Lag (H.LAG) multiplied by the change in the Heat Demand. Therefore, if the corrected current demand is in between –1.0 and

1.0, the number of stages will not change no matter how long there has been a positive error. Because the corrected heat demand incorporates the rate of change in heat demand, it will have a tendency to add or remove stages earlier when the temperature in the space is moving very rapidly, thereby reducing overshoot.

Because the first method of adding or removing a stage of heat is used to operate around the steady number of stages, this method can not be used to add an additional stage until a stage has been subtracted. Likewise, if this method has subtract ed a stage, it can not be used again to subtract another stage until a stage has been added.

The second method will add additional stages of heat whenever Heat Demand is greater than HT.PD + 0.5 and the heat demand is increasing at rate greater than 0.3 F per min. Additional stages of heat will be removed whenever the Heat Demand is less than HT.ND – 0.5 and the heat demand is decreasing at rate less than 0.3 F per min.

Table 26 — IGC LED Indications

ERROR CODE LED INDICATION Normal Operation Hardware Failure Fan On/Off Delay Modified Limit Switch Fault Flame Sense Fault Five Consecutive Limit Switch Faults Ignition Lockout Fault Inducer Switch Fault Rollout Switch Fault Internal Control Fault Software Lockout

LEGEND

IGC — LED —

NOTES:

1. There is a 3-second pause between error code displays.

2. If more than one error code exists, all applicable error codes will

3. Error codes on the IGC will be lost if power to the unit is

Integrated Gas Unit Controller Light-Emitting Diode

be displayed in numerical sequence.

interrupted.

On Off

1 Flash 2 Flashes 3 Flashes 4 Flashes 5 Flashes 6 Flashes 7 Flashes 8 Flashes 9 Flashes

Heating (50HG Units)

NOTE: THE 50HG units have 2 stages of heat.

For 50HG units, the heat type will automatical ly be set to 2 for electric heat units if the electric heat was installed in the factory (HT.TY ). If elec tric heat is being i nstalled in the field, the user must change HT.TY from 0 to 2. If a 15 kW heater is installed, N.HTR must be changed from 2 to 1.

Heat will not operate if the outdoor temperature is greater than the heat lockout temperature (HT.LO).

THERMOSTAT CO NTROL — The first stage of electric heat (HTR.1) will follow the W1 input and the second stage (HTR.2) of heat will follow the W2 input. During auto fan, the indoor fan will follow the HTR.1 output. During continuous fan, the indoor fan will follow the G input.

Page 30

If the user has selected Adaptive (see Cooling section) for thermostat mode, the algorithm will follow the configurable delays for adding and removing stages. When adding additional heat stages, the delay is measured from whe n the last stage was added (H.INC). When removing stages, the delay is measured from when the last stage was removed (H.DEC). Therefore, if W1 and W2 turn on simultaneously, the second stage will turn on after a H.INC delay.

NOTE: If the mode is not Adaptive, then there are no delays for adding and removing stages.

SPACE SENSOR CONTROL — During Space Sensor control, the electronic control uses information from the space sensor to determine the number of heat stages. Once, the number of stages needed for heating is determined, either HTR.1 or W1 and W2 outputs will be turned on. See Space Sensor Control section for 48HG units.

NOTE: The jumper wire in the installer's pa cker must be connected between R and W1 when using a T55, T56, or T58 device. See Fig. 1 and 2.

Cooling —

pressor Lockout Temperature (MC.LO), then compressors will not operate.

THERMOST AT CONTROL — There ar e three t yp e s o f thermostat control as defined by thermostat control type (T.CTL): 0 is referred to as Adaptive control, 1 is referred to as 1-stage Y1, and 2 as 2-stage Y1. The preferred method of control is Adaptive.

For both 1-stage Y1 and 2-stage Y1 control methods, the adaptive control method is used whenever the ec onomizer c an provide cooling, regardless of the selected control method. This will ensure proper time delays and SAT control whe n the economizer is cooling. If the economizer cannot provide cooling, then the 1-stage Y1 and 2-stage Y1 control methods follow the thermostat inputs directly.

On two-compressor units (size 014 and 028 units), the 1-stage Y1 and 2-stage Y1 control methods are ide ntical and the compressor outputs follow the thermostat inputs directly, obeying the compressor minimum on-time (MRT.C) and minimum off-time (MOT.C) (equal to 3 and 5 minutes, respectively).

For 3-compressor units (size 016 to 024 units), Y1 will turn on one stage when configured for 1-stage Y1, and two stages when configured for 2-stage Y1. When Y2 is On, all three stages will operate. The compressor must follow the minimum on- and off-time requirements. If multiple compressor are requested on or off simultaneously, the compressors will be staged at a 5-second interval.

In Adaptive mode, thermostat cooling begins when the Y 1 input is energized. If the economizer is available for cooling, the economizer will try to provide cooling as discussed in the Economizer section. If the economizer is not available for cooling or the economizer has been at 100% for 5 minutes, compressor staging will begin when Y1 is energized.

For size 014 and 028 units, the compressor stages will follow the Y1 and Y2 inputs directly with a configurable delay when adding stages (C.INC) and when removing stages (C.DEC). Therefore, if Y1 and Y2 turn on simultaneously, the second stage will turn on after a C.INC delay. In Adaptive mode, a stage of compression cannot be turned on if the Supply Air Temperature (SAT) is less than Minimum Supply Air Temperature Upper Level (MIN.H). In addition, a stage of compression will be removed if SAT is less than the Minimum Supply Air Temperature Lower Level (MIN.L). If MIN.H and MIN.L are configured so that they are close togethe r, the last

If the outdoor temperature is less than the Com-

stage of compressor might cycle rapidly, slowed only by its minimum on- and off-time requirements.

For size 016 to 024 units, the algorithm must decide how to map a two-stage thermostat to three stages of compression. The staging algorithm uses information from Y1, Y2, and the supply-air temperature to determine the number of stages. If Y1 = OFF, then no compressors will operate unless they are being forced to run in order to status their minimum on-time. If Y1 = ON, then either 1 or 2 stages will operate. Finally, if Y2 = ON, then after the C.INC delay times, the maximum number of stages will operate. When only Y1 is ON, the unit will decide to operate 1 or 2 stages of compression using the following logic. When Y1 turns ON, the first stage of compressor will turn on immediately . The algorithms begin to count the number of seconds since the last change in the number of compressors (in this case, from 0 to 1). After the compressor settling time (SAT.T) is reached, a reference value for SAT is stored. If, while operating with only one compressor on, the return temperature begins to rise, and therefore the SAT temperature rises also, the second compressor will be added when SAT is greater the SAT reference plus SAT positive demand (SA.PD). After the second compressor has been added, another SAT reference value will be taken. The second stage will be turned off when SAT is less than SAT reference plus SAT negative demand (SA.ND). If at anytime Y2 is turned ON, then the algorithm would immediately try to reach 3 stages following the C.INC requirement. If Y1 turns OFF, then all the compressors will turn off after their minimum on-time has been met.

SPACE SENSOR C ONTROL — To operate the unit in Space Sensor mode, Unit Control Type must be set to Space Sensor (3) and a wire must be added between R and W1 on TB4. See Fig. 1 or 2.

While in space sensor control mode, the unit tries to maintain the Space Temperature (SPT) at one of 4 different set points: the Occupied Cool Set Point (OCSP), the Unoccupied Cool Set Point (UCSP), the Occupied Heat Set Point (OHSP), or the Unoccupied Heat Set Point (UHSP). The building’s occupancy is affected by a number of different factors. See Occupancy Determination section on page 26. When the building is occupied, the occupied set points are active. When the building is unoccupied, the unoccupied set points are active.

Because Space Sensor mode is an “Auto” mode, the control will switch between cooling and heating to maintain t emperature. However, to minimize unnecessary cool to heat and heat to cool changes, there is a 10-minute delay after the last stage turns off before the control will switch modes.

T o maintain temperature while cooling, the unit will turn on compressors as needed when the economizer is either unavailable or not providing enough cooling. Information from the space sensor and the supply temperature sensor is used to determine the number of necessary stages. The minimum on-time for each compressor is 3 minutes (MRT.C). The minimum off-time is 5 minutes (MOT .C).

Because the unit contains 3 compressors, each with its own circuit, there are 3 stages of cooling (the economizer is not considered a stage of cooling even though it can provide cooling in certain situations). In general, the minimum time between increasing stages is a configurable delay (C.INC). The minimum time between decreasing stages is a configurable delay (C.DEC).

The unit will request a stage of c ooling whenever t he Cool Demand (SPT – set point) is greater than the SPT Cool Demand Positive Level (CL.PD) plus the change in Cool Demand times the Cool Thermal Lag (C.LAG).

Page 31

Consider the following values: Cool Demand = 0.9, change in Cool Demand = 0.2, Cool Thermal Lag = 1.0, and Cool Demand Positive Level = 1.0. Because 0.9 + 0.2*1.0 is greater than 1.0, a stage of cooling would be added. This method of adding a stage can only be used after the compressor settling time has expired (SAT.T) and trend in SAT is increasing or slowly decreasing. This method of adding a stage of cooling can not be used again until a stage of cooling has been removed. Additional stages of cooling can be added whenever Cool Demand is greater than CL.PD + 0.5 and the SAT is increasing at rate greater than –0.3 F/min.

The unit will remove a stage of cooling whenever the Cool Demand (SPT – set point) is less than the SPT Cool Demand Negative Level (CL.ND) plus the change in Cool Demand times the Cool Thermal Lag (C.LAG). Consider the following values: Cool Demand = –0.9, change in Cool Demand = –0.2, Cool Thermal Lag = 1.0, and Cool Demand Negative Level = –1.0. Because –0.9 + –0.2*1.0 is less than –1.0, a stage of cooling would be removed. This method of removing a stage can only be used after the compressor settling time has expired (SAT.T) and the trend in SAT is decreasing or slowly increasing. This method of removing a stage of cooling cannot be used again until a stage of cooling has been added. Additional stages of cooling can be removed whenever the Cool – D emand is less than CL.ND –0.5 and the SAT is increasing at rate less than 0.2 F/min.

Space Temperature Sensor Calibration and Tri m —

temperature sensor (SPT) can be calibrated. The sensor can be calibrated by entering data using either the ComfortLink™ display or by using Service Tool. The SPT calibration information is found under CALB submenu of Temperatures when using the Scrolling Marquee, or under the maintenance table SENS_CAL when using Service Tool. When using either method, the user can calibrate the sensor by entering the correct space temperature at SPT.C (display) or SPT_CAL (Service Too l ). The s oftw are wil l a utom a tical ly ca lcu lat e the tri m v al ue SPT.T (display) or SPT_OFF (Service Tool). The space temperature should be measured with an accurate temperature measuring device. The user can also calibrate the sensor by entering the trim value directly. The trim value should be positive when the SPT sensor is reading low and it should be negative when the SPT is reading high.

calibrated. In general, the SPT should be calibrated only when the space is near its expected operating temperature. If the calibration value is refused by either the Scrolling Marquee or its CCN table, calibration is currently not being allowed by the software. The SPT Trim can be set at any time.

→

Alarm Handling —

and alarms in the system. Alerts are indicated by TXXX (where XXX is the alert number) on the display and generally signify that the improperly functioning circuit can restart without human interaction. If an alarm occurs, indicated by AXXX (where XXX is the alarm number), the damaged circuit will generally not restart without an alarm reset via the Scrolling Marquee display or CCN.

alarms depends on the seriousness of the particular alert or alarm. In the mildest case, an alert does not affect the operation of the unit in any manner. An alert can also cause a “strike.” A “striking” alert will cause the circuit to shut down for 15 minutes. This feature reduces the likelihood of false alarms causing a properly working system to be shutdown incorrectly. If three strikes occur before the circuit has an opportunity to show that it can function properly, the circuit will strike out, causing the shutdown alarm for that parti cular circuit. Once activated, the shutdown alarm can only be cleared via an alarm reset.

On units with V ersion 2.1 software or later , the space

If SP T if forced (T58 sensors) or failed, the sensor cannot be

There are a variety of different alerts

The response of the control system to various alerts and

However, circuits with strikes will be given an opportunity to reset their strike counter to zero. As discussed above, a strike typically causes the circuit to shutdown. Fifteen minutes lat er, that circuit will once again be allowed to run. If the circuit is able to run for 1 minute, its replacement circuit will be allowed to shut down (if not required to run to satisfy requested stages). However, the “troubled” circuit must run continuously for 5 minutes with no detectable problems before the strike counter will be reset to zero.

Operators with CCN networks might not want to be notified of “striking” alerts until a circuit has been shut down because of three alerts. If the operator sets A.NOW (Alarm Now ) to NO, alerts will not be announced until a circuit is permanently shut down. This implies that alarm will not be broadcast on the CCN network or listed on the display until a permanent shutdown alarm occurs.

The status of A.NOW is ignored during Service Test mode because it is presumed that the service techni cian will want to be notified of any alerts or alarms immediately. So as not to confuse a monitor center, the words “SERVICE TEST” are inserted into every alarm message while the unit is operating in Service Test Mode. The alarm output relay can be configured using the Scrolling Marquee under ALRM in the configuration menu or by using the ALARMOUT table via Service Tool. This configuration allows the user to decide whether or not the alarm output will activate when a part icular set of alarms occurs. (See Appendix A, ALARMOUT table.)

TROUBLESHOOTING

The Scrolling Marquee display shows the actual operating conditions of the unit while it is running. If there are alarms or there have been alarms, they will be displayed in either the current alarm list or the history alarm list. See Tables 21 and

27. The Service Test mode allows proper operation of the compressors, fans, and other components to be checked while the unit is not operating. See Service Test on page 12.

Complete Unit Stoppage —

tions that can cause the unit not to provide heating or cooling:

• If an alarm is active which causes the unit to shut down,

diagnose the problem using the information provided in Alarms and Alerts section below.

• Cooling and heating loads are satisfied.

• Programmed schedule.

• General power failure.

• Tripped CB1, CB2 or CB3 (24-volt transformer circuit

breakers).

• Blown fuse (1 or 2).

• Unit is turned off through the CCN network.

• If unit cannot cool, supply air temperature may be less

than variable MIN.L (Default = 48 F).

Single Circuit Stoppage —

incorrectly, there are several possible causes. The problem should be investigated using information from the alarm list. See Tabl e 27.

Service Analysis —

found in T ables 28, 29, and 30 and in Fig. 13.

Restart Procedure —

machine, check the alarm list to determine the cause of the shutdown. If the shutdown alarm for a particular circuit has occurred, determine and correct the cause before allow ing the unit to run under its own control again. When there is problem, the unit should be diagnosed in Service Test mode. The alarms must be reset before the circuit can operate in either Normal mode or Service Test mode.

Detailed service analysis can be

Before attempting to restart the

There are several condi-

If a single circuits stops

202

Page 32

Alarms and Alerts —

abnormal or fault conditions, and may cause either one circuit or the entire unit to shut down. They are assigned code numbers and descriptions as described below. The description for an alarm can be viewed from the Scrolling Marquee display by pressing and keys simultaneously while displaying the alarm code number. Be sure to expand the description for each alert a nd alarm, because in some cases, there are different possible descriptions for each number. T able 27 contains a detailed description of each alarm and alert code error and possible cause. Possible actions taken by the electronic controls are:

• nothing

• adding a “strike” to the strike counter for a particular circuit

• shutting down a circuit

• shutting down the unit.

When a “strike” is added, the circuit is shut down for 15 minutes. After 3 strikes, the circuit will be permanently shut down until the alarms are reset via the Scrolling Marquee display. More i nformation concerning alarm handling can be found in Alarm Handling on page 31.

DIAGNOSTIC ALARM CODES AND POSSIBLE CAUSES

→

Alert Codes 51, 55 and 59 (Compressor Safety) codes 51, 55, and 59 are for compressors A1, B1, and C1, re spectively. These alerts occur when the Current Sensor (CS) does not detect compressor current during compressor operation. When this occurs, the control turns off the compressor and logs a strike for the respective circuit. These alerts reset automatically.

The possible causes are:

1. High-pressure switch (HPS) open. The HPS-pressure switch is wired in series with compressor relays on the MBB. If the high-pressure switch opens during compressor operation, the compressor stops, and the CS no longer detects current, causing the control to activate this alert.

2. Compressor internal protection is open.

3. Wiring error . A wiring error might not allow the compressor to start.

T o check out alerts 51, 55 and 59:

1. Turn on the compressor in question using Service Test mode. If the compressor does not start, then most l ikely the problem is one of the following: HPS open, open internal protection, incorrect safety wiring, or incorrect compressor wiring.

2. If the compressor starts, verify that the indoor and outdoor fans are operating properly.

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

4. Return to Normal mode and observe compressor operation to verify that compressor current sensor is working and condenser fans are energized after compressor starts.

Alert Codes 51, 55 and 59 (Current Detected After Turnoff) — Alert codes 51, 55, and 59 are for compressors A1, B1, and C1, respectively. These alerts occur when the Current Sensor (CS) detects current when the compressor should be off. When this occurs, the control turns off the compressor and logs a strike for the respective circuit. Use the Scrolling Marquee to reset the alert.

ESCAPE

Alarms and alerts are warnings of

ENTER

— Alert

The possible causes are

1. W elded contactor.

2. Frozen compressor relay on MBB.

T o check out alerts 51, 55 and 59:

1. Place the unit in Service Test Mode. All compressors should be Off.

2. Verify that there is not 24V at the contactor coil. If there is 24V at the contactor, check relay on MBB and wiring.

3. Check for welded contactor.

4. Verify CS wiring.

5. Return to Normal mode and observe compressor operation to verify that compressor current sensor is working and condenser fans are energized after compressor starts.

Alert Codes 64, 65 and 80 (Condensing Temp. Failure) Alert codes 64, 65, and 80 are for circuits A , B and C, respectively. These alerts occur when the temperature is outside the range –40 to 240 F (–40 to 116 C). When this occurs, the control uses the outdoor temperature to control the outdoor fans. If the outdoor temperature is greater than 40 F, t h e circuit will run at Fan Level 2. If t he outdoor temperature is less t han 35 F , the circuits will run at Fan Level 1. If the outdoor-air sensor is also bad, the circuit will be locked out, otherwise this alert resets automatically.

The cause of the alert is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection.

Alert Code 73 (Outside Air Temp. Failure) when the temperature is outside the range –40 to 240 F (–40 to 116 C). This alert resets automatically. The cause of the alert is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection.

Alert Code 74 (Space Temp. Failure) when the temperature is outside the range –40 to 240 F (–40 to 116 C). This alert will only occur if the unit is in Space Sensor Mode. The unit will shut down if this alert occurs while in Space Sensor mode. This al ert resets automa tically. The cause of the alert is usually a faulty thermistor in the T55, T56, or T58 device, a shorted or open thermistor caused by a wiring error, or a loose connection.

→

Alert Code 75 (Supply Air Temp. Failure) when the temperature is outside the range –40 to 240 F (–40 to 116 C). This alert resets automatically. The cause of the alert is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or a loose connection.

Alert Code 80 (Condensing Temp. Failure) Alert Codes 92, 93, 101 (Suction Pres. Trans. Failure)

codes 92, 93, and 101 are for circuits A, B and C, respectively. These alerts occur when the pressure is outside the range 0.5 to

134.5 psig. A circuit cannot run when this alert is active. U se the Scrolling Marquee to reset the alarm. The cause of the alert is usually a faulty transducer, faulty 5-V power supply, or a loose connection.

Alert Codes 102, 103, 104 (Current Sensor Failure) codes 102, 103, and 104 are for compressors A1, B1, and C1, respectively. These alerts occur when the output of the current sensor (CS) is a constant high value. These alerts reset automatically. The cause of the alert is a wiring error or a loose connection. If the problem cannot be resolved and the CS board must be replaced, the CS board can be temporarily disabled while securing a replaced board. A CS board is disabled by setting the corresponding configuration to DISABLE (CS.A1, CS.B1 or CS.C1).

— This alert oc curs

— This alert occurs

— See Alert 64.

— Alert

—

202

Page 33

Alert Codes 110, 111, 140 (Loss of Charge) 110, 111, and 140 are for circuits A, B and C, respectively. These alerts occur when the compressor is OFF and the suction pressure < 5 psig and OAT > –5 F for 1 continuous minute. Use the Scrolling Marquee to res et the alert. The cause of the al ert is usually low refrigerant pressure or a faulty suction pressure. These alerts only occur when the compressor is OFF because the low refrigerant pressure alarms (alerts 133, 134 and 141) handle this situation when the compressor is operating.

→

Alert Codes 126 , 127, 14 2 (Hi gh Ref rige rant Pres sure) codes 126, 127, and 142 are for circuits A, B, and C, respectively. These alerts occur when alerts 51, 55, or 59 are active while the appropriate condensing temperature is greater than 150 F. Thes e alert s reset automat ically. The cause of the alarm is usually an overcharged system, high outdoor ambient temperature coupled with dirty outdoor coil, plugged filter drier , or a faulty high pressure switch. See Alerts 51, 55 and 59 for diagnostic procedure.

Alert Codes 133, 134, 141 (Low Refrigerant Pressure) codes 133, 134, and 141 are f or c irc uits A, B and C, res pectively. These alerts occur when the compressor is operating and the evaporating temperature (converted from the suction pressure) is less than 20 F for 5 minutes , 15 F for 3 minutes, or 10 F for

1.5 minutes. When the outdoor temperature is less than 40 F , the above values are reduced by an o ffset that scales between 0 and 10 as the outdoor temperature goes from 40 to 0° F. These alerts cause a strike for the respective circuit. These alerts will activate when the coil becomes frosted. However, during the 15-minute reset period, the coils will thaw and strike should clear at restart if there is nothing else wrong with the circuit. The alert resets automatically. The cause of the alert is usually low refrigerant charge, dirty filters, evaporator fan operating backwards, loose or broken belt, plugged filter drier, faulty transducer, excessively cold return air, or stuck open economizer when the ambient temperature is low.

Alert Code 140 (Loss of Charge) Alert Code 141 (Low Refrigerant Pressure) Alert Code 142 (High Refrigerant Pressure) Alert Codes 143, 144, 145 (Failure to Pressurize)

codes 143, 144, and 145 are for circuits A, B, and C, respectively. These alerts occur when the compressor turns on and the suction pressure does not drop 5 psig during the first 15 seconds and the condensing temperature does not rise 5 F during the first minute. These alerts cause a s trike for the respective circuit. The alert resets automatica lly. The cause of the alert is usually compressor wiring causing reverse rotation or a faulty compressor.

Alarm Codes 163, 164, 165 (Circuit Failure) 163, 164, and 165 are for circuits A, B, and C, respectively. These alarms occur when a circuit has 3 strikes. Use the Scrolling Marquee display to reset the a larm. Investigate the alarm that caused the strikes to occur.

Alert Code 179 (Com. Failure with ECB) when the MBB cannot communicate with the ECB. This is usually caused by a wiring problem. Investigate using the Low Voltage Schematic.

Alert Codes 180 (Com. Failure with Economizer Actuator) This alert occurs when the MBB cannot communicate with the

— See Alert 110.

— Alert codes

— Alert

— See Alert 133.

— See Alert 126.

— Alert

— Alarm codes

— This aler t occurs

— Alert

—

Belimo Actuator. This is usually caused by a wiring problem. Investigate using the Low Voltage Schematic.

Alarm Code 404 (Fire Shutdown) the shutdown input is either open or closed depending upon its configuration. This alarm is usually caused by an auxiliary device that is trying to shut down the unit, e.g., smoke detector. The configuration for this switch input can be found at variable FS.SW. Verify t hat the configuration is set correct, verify the wiring and auxiliary device. This alarm resets automatically .

Alert Code 408 (Dirty Air Filter) the Filter Status switch senses a plugged filter for 120 continuous seconds after the indoor fan has been running for 10 seconds. Because the Dirty Air Filter switch can be configured normally opened or closed, the switch might be open or closed. The configuration for this switch input can be found at variable FL.SW. Verify that the configuration is set correct, verify the wiring and filter status switch. The hose should be connected to the low side of the switch. This alert resets automatically.

Alert Code 409 (Fan Status Switch On, Fan Contactor Off) — This alarm occurs when the fan status switch has sensed that the indoor fan has been on for 10 seconds and the indoor fan feedback has determined that the indoor fan should be off. Because the Fan Status switch can be configured normally opened or closed, the switch might be open or closed. The configuration for this switch input can be found at Scrolling Marquee: Configuration mode, UNIT submode, FN.SW. Verify that the configuration is set correctly. Verify the wiring and fan status switch. The hose should be connected to the high side of the switch. If the IDF is configured to shut down the unit when this alarm occurs (Scrolling Marquee: Configuration mode, UNIT submode, IDF .F = YES), then this alarm can only be reset manually and the unit is shut down. I f the IDF is not configured to shut the unit down when this alarm occurs (Scrolling Marquee: Configuration mode, UNIT submode, IDF.F = NO), then this alarm resets automatically and no specific control action is taken.

→

Alert Code 409 (Fan Status Switch Off, Fan Contactor On) — This alert occurs when the fan status switch has sensed that the indoor fan has been off for 10 seconds and the indoor fan feedback has determined that the indoor fan should be on. Because the Fan Status switch can be configured normally opened or closed, the switch might be open or closed. The configuration for this switch input can be found at Scrolling Marquee: Configuration mode, UNIT submode, FN.SW. Verify that the configuration is set correctly. Verify the wiring and fan status switch. The hose should be connected to the high side of the switch. If the IDF is configured to shut down the unit down when this alert occurs (Scrolling Marquee: Configuration mode, UNIT submode, IDF .F = YES), then this alarm can only be reset manually and the unit is shut down. I f the IDF is not configured to shut the unit down when this alert occurs (Scrolling Marquee: Configuration mode, UNIT submode, IDF.F = NO), then this alert resets automatically and no specific control action is taken.

Alert Code 409 (Fan Feedback On When Not Expected) This alert occurs when the Fan Fe edback signal has been On for more than 5 seconds yet the Fan Power relay is Off. Verify wiring.

— This alarm occurs when

— This alert occurs when

—

202

Page 34

Alert Code 409 (Fan Feedback Off When Not Expected) This alert occurs when the IDF has been on for more than 15 seconds yet the Fan Feedback is Off. Verify wiring. Compressors will not be allowed to run until this alert clears. Check for errors on the IGC which might have caused the IDF to turn off.

Alert Code 410 (R-W1 Jumper Not Installed in Spare Temp Mode) — This alert occurs when the control mode is Space Tem perature Mode via Auto Select or Spa ce Temp Select yet there is no power to W1. Verify that space temperature mode is the desired mode or add jumper between R and W1. This alert resets automatically.

→

Alert Code 410 (R-W1 Jumper Must be Installed to Run Heat in Service Test) — This alert occurs when a request for a heat output has occurred yet the W1 input is not high. A jumper must be installed between R and W1 when trying to test heat in Service Test. The alert will clear when Service Test is exited or if another Service Test mode is selected. Remove jumper when done using Service Test if the unit is operating with a Thermostat. The jumper should only be left in place if the unit is operating with a Space Temperature Probe.

Alert Code 411 (Y2 without Y1) Thermostat Mode when Y2 is energized and Y1 is not. Verify thermostat and thermostat wiring. When Y2 turns On, the software will behave as if Y1 and Y2 are both On. When Y2 turns Off, the software will behave as if Y1 and Y2 are both Off. This alert resets automatically when Y1 is turned On.

Alert Code 412 (W2 without W1) Thermostat Mode when W2 is energized and W1 is not. Verify thermostat and thermostat wiring. When W2 turns On, the software will behave as if W1 and W2 are both On. When W2 turns Off, the software will behave as if W1 and W2 a re both Off. This alert resets automatically when W1 is turned On.

Alert Code 413 (Y and W Simultaneously) occurs in Thermostat Mode when Y1 or Y2 is energized simultaneously with W1 or W2. Verify thermostat and thermostat

— This alert occurs in

— This alert

—

wiring. The software will enter either the cooling or heating mode depending upon which input turned on first. This alert resets automatically when Y1 and Y2 are not on simultaneously with W1 and W2.

Alert Code 414 (Economizer Damper Actuator Out of Calibration) — This alert occurs when the economizer range of motion is less than 90 degrees. Initiate economizer calibration (E.CAL) using the Service Test menu. The economizer calibration procedure will try to find new maximum open and closed positions. If the alert does not clear automatically after the calibration procedure is complete, investigate what is limiting economizer rotation. This alert resets automatically.

Alert Code 414 (Economizer Damper Actuator Torque Above Load Limit) — This alert occurs when the actuator load is too high. Investigate to determine what is increasing damper load . Th is aler t r eset s a utom ati cal ly.

Alert Code 414 (Economizer Damper Actuator Hunting Excessively) — This alert occurs when the commanded damper position is changing too rapidly. This alert resets automatically.

Alert Code 414 (Economizer Damper Stuck or Jammed) This alarm occurs when the actuator senses it can no longer move. Investigate what is stopping the rotation of the actuator and fix. This alert resets automatically.

Alert Code 414 (Economizer Damper Actuator Mechanical Failure) — This alert occurs when the actuator senses a catastrophic failure. Investigate actuator and replace if necessary. This alert r es ets a utom ati cal ly.

Alert Code 414 (Economizer Damper Actuator Direction Switch Wrong) — This alert occurs when the economizer damper direction switch is in the wrong position. The direction switch should be in the clockwise position and the actuator should be mounted so that the CW face of the actuator is accessible. Correct if necessary. This alert clears automatically.

—

202

Page 35

→

ALARM OR

ALERT

NUMBER

T051

T055

T059

T064

T065

T073

T074

T075

T080

T092 T093 T101 T102 T103 T104 T110 T111 T126

T127

T133

T134

T140 T141

T142

T143 T144

T145 A163 A164 A165

T179

T180

A404

T408

T409

T410

T411

T412

T413

T414

ECB — IGC — MBB — OAT —

Table 27 — Alarm Codes

DESCRIPTION

Compressor A1 Safety Trip Add Strike for Circuit A Automatic High-pressure switch open. Check for T126 Compressor internal pro-

Compressor A1 Current Detected After Turnoff Turn off all compressors Automatic Welded contactor Compressor B1 Safety Trip Add Strike for Circuit B Automatic High-pressure switch open. Check for T127 Compressor internal pro-

Compressor B1 Current Detected After Turnoff Turn off all compressors Automatic Welded contactor Compressor C1 Safety Trip Add Strike for Circuit C Automatic High-pressure switch open. Check for T142 Compressor internal pro-

Compressor C1 Current Detected After Turnoff Turn off all compressors Automatic Welded contactor Circuit A Saturated Condensing Temp Thermistor

Failure Circuit B Saturated Condensing Temp Thermistor

Failure Outdoor Air Temperature Thermistor Failure — Automatic Faulty, shorted, or open thermistor caused by wiring error or loose

Space Temperature Thermistor Failure Unit shutdown Automatic Faulty, shorted, or open thermistor caused by wiring error or loose

Supply Air Temperature T hermistor Failure — Automatic Faulty, shor ted, or open thermistor caused by wiring error or loose

Circuit C Saturated Condensing Temp Thermistor Failure

Circuit A Suction Pressure Transducer Failure Shutdown Circuit A Manual Faulty transducer, faulty 5-V power supply, or loose connection Circuit B Suction Pressure Transducer Failure Shutdown Circuit B Manual Faulty transducer, faulty 5-V power supply, or loose connection Circuit C Suction Pressure Transducer Failure Shutdown Circuit C Manual Faulty transducer, faulty 5-V power supply, or loose connection Compressor A1 Current Sensor Failure — Automatic Faulty current sensor caused by wiring error or loose connection Compressor B1 Current Sensor Failure — Automatic Faulty current sensor caused by wiring error or loose connection Compressor C1 Current Sensor Failure — Automatic Faulty current sensor caused by wiring error or loose connection Circuit A Loss of Charge Shutdown Circuit A Manual Low refrigerant or faulty suction pressure transducer Circuit B Loss of Charge Shutdown Circuit B Manual Low refrigerant or faulty suction pressure transducer Circuit A High Refrigerant Pressure Shutdown Circuit A Automatic An overcharged system, high outdoor ambient temperature coupled

Circuit B High Refrigerant Pressure Shutdown Circuit B Automatic An overcharged system, high outdoor ambient temperature coupled

Circuit A Low Refrigerant Pressure Add Strike for Circuit A Automatic Low refrigerant charge, dirty filters, evaporator fan turning backwards,

Circuit B Low Refrigerant Pressure Add Strike for Circuit B Automatic Low refrigerant charge, dirty filters, evaporator fan turning backwards,

Circuit C Loss of Charge Shutdown Circuit C Manual Low refrigerant or faulty suction pressure transducer Circuit C Low Refrigerant Pressure Add Strike for Circuit C Automatic Low refrigerant charge, dir ty filters, evaporator fan turning backwards,

Circuit C High Refrigerant Pressure Shutdown Circuit C Automatic An overcharged system, high outdoor ambient temperature coupled

Circuit A Failure To Pressurize Add Strike for Circuit A Automatic Wiring causing reverse rotation or faulty compressor Circuit B Failure To Pressurize Add Strike for Circuit B Automatic Wiring causing reverse rotation or faulty compressor Circuit C Failure To Pressurize Add Strike for Circuit C Automatic Wiring causing reverse rotation or faulty compressor Circuit A Down Due to Failure Shutdown Circuit A Manual Circuit has 3 strikes or has been locked out by another alarm Circuit B Down Due to Failure Shutdown Circuit B Manual Circuit has 3 strikes or has been locked out by another alarm Circuit C Down Due to Failure Shutdown Circuit C Manual Circuit has 3 strikes or has been locked out by another alarm Loss of communication with the Economizer

Control Board Loss of communication with the Economizer

Actuator Fire Shutdown Unit Shutdown Automatic Smoke detected by smoke detector Dirty Filter — Automatic Dirty Filter Fan Status Switch ON, Contactor OFF If IDF.F = Yes, then Unit Shutdown If IDF.F = YES,

Fan Status Switch OFF, Contactor ON If IDF.F = Yes, then Unit Shutdown If IDF.F = YES,

Fan Feedback ON when not Expected — Automatic Bad relay. Fan Feedback OFF when not Expected Compressors will not operate Automatic Bad IGC, wiring problem, or bad MBB relays. R-W1 Jumper Not Installed in Space Temp Mode Unable to run heat Automatic Missing jumper wire R-W1 Jumper Must Be Installed to Run Heat In

Service Test Thermostat Y2 Input Activated without Y1

Activated Thermostat W2 Input Activated without W1

Activated Thermostat Y and W Inputs Activated

Simultaneously Economizer Damper Actuator Out of Calibration Aler t Generated Automatic Calibrate economizer (E.CAL). If problem still exist then determine

Economizer Damper Actuator Torque Above Load Limit

Economizer Damper Actuator Hunting Excessively Alert Generated Automatic Damper position changing too quickly. Economizer Damper Stuck or Jammed Alert Generated Automatic No economizer motion. Check actuator. Economizer Damper Actuator Mechanical Failure Alert Generated Automatic Check actuator and replace if necessary. Economizer Damper Actuator Direction Switch

Wrong

LEGEND

Economizer Control Board Integrated Gas Controller Main Base Board Outdoor-Air Thermistor

ACTION TAKEN

BY CONTROL

Use OAT to control Outdoor fans Automatic Faulty, shorted, or open thermistor caused by wiring error or loose

— Automatic Communication wiring problem with ECB or faulty MBB or ECB

— Automatic Communication wiring problem with actuator.

Unable to Test Heat Outputs Automatic Missing jumper wire.

Run unit as if Y2 and Y1 are On Automatic Bad Thermostat or Thermostat Wiring

Run unit as if W2 and W1 are On Automatic Bad Thermostat or Thermostat Wiring

Run unit in mode activated first Automatic Bad Thermostat or Thermostat Wiring

Alert Generated Automatic Actuator load too high. Check damper load.

Alert Generated Automatic Switch wired incorrect direction.

RESET

METHOD

then Automatic,

otherwise

manual

then Automatic,

otherwise

manual

PROBABLE CAUSE

tection open. Wiring error

connection.

with dirty outdoor coil, plugged filter drier, or a faulty high-pressure switch.

loose or broken fan belt, plugged filter drier, faulty transducer, excessively cold return air, or stuck open economizer when the ambient temperature is low.

with dirty outdoor coil, plugged filter drier, or a faulty high-pressure switch.

Bad Fan Status Switch. Configuration incorrect.

Tripped Circuit Breaker. Broken belt. Bad indoor fan motor. Configuration incorrect. Bad fan status switch.

what is limiting economizer rotation.

202

Page 36

→

PROBLEM CAUSE REMEDY

Compressor and fan will not start.

Compressor cycles (other than normally satisfying thermostat).

Compressors operates continuously.

Excessive head pressures.

Condenser fans not operating. Excessive suction pressure.

Suction pressure too low.

LEGEND

CB — TXV —

Circuit Breaker Thermostatic Expansion Valve

Table 28 — Cooling Service Analysis

Power failure. Call power company. Fuse blown or circuit breaker tripped. Check CB1,

CB2, and CB3. Disconnect off. Power disconnect. Compressor time guard to prevent short cycling. Check using Thermostat or occupancy schedule set point not call-

ing for Cooling. Outdoor temperature too low. Check Compressor Lockout Temperature (MC.LO)

Active alarm. Check active alarms using

Insufficient line voltage. Determine cause and correct. Active alarm. Check active alarms using

Unit undersized for load. Decrease load or increase of size of unit. Thermostat or occupancy schedule set point too low. Reset thermostat or schedule set point. Dirty air filters. Replace filters. Low refrigerant charge. Check pressure, locate leak, repair evacuate, and

Condenser coil dirty or restricted. Clean coil or remove restriction. Loose condenser thermistors. Tighten thermistors. Dirty condenser coil. Clean coil. Refrigerant overcharge. Recover excess refrigerant. Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

Condenser air restricted or air short cycling. Determine cause and correct. Restriction in liquid tube. Remove restriction. No Power to contactors. Fuse blown or plug at motor loose. High heat load. Check for sources and eliminate Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

Refrigerant overcharged. Recover excess refrigerant. Dirty air filters. Replace air filters. Low refrigerant charge. Check for leaks, repair, and recharge. Faulty TXV. 1. Check TXV bulb mounting and secure tightly to

Insufficient evaporator airflow. Check belt tension. Check for other restrictions. Temperature too low in conditioned area (low return-

air temperature).

Replace fuse or reset circuit breaker.

Comfor t

Link™ Scrolling Marquee.

Check using

using

Marquee.

recharge.

suction line and insulate.

2. Replace TXV (and filter drier) if stuck open or closed.

suction line and insulate.

2. Replace TXV (and filter drier) if stuck open or closed.

suction line and insulate.

2. Replace TXV (and filter drier) if stuck open or closed.

Reset thermostat or occupancy schedule.

Comfor t

Comfort

Link Scrolling Marquee.

Comfor t

Link Scrolling

Comfor t

Link Scrolling

202

Page 37

PROBLEM CAUSE REMEDY

Burners will not ignite.

Inadequate Heating.

Poor flame characteristics.

Burners will not turn off.

Table 29 — Gas Heating Service Analysis

Active alarm. Check active alarms using

No power to unit. Check power supply, fuses, wiring, and circuit breakers. No power to IGC (Integrated Gas Control). Check fuses and plugs. Heaters off due to time guard to prevent short

cycling. Thermostat or occupancy schedule set point not

calling for Cooling. No gas at main burners. Check gas line for air and purge as necessary. After purg-

Water in gas line. Drain water and install drip. Dirty air filters. Replace air filters. Gas input too low. Check gas pressure at manifold. Refer to gas valve adjust-

Thermostat or occupancy schedule set point only calling for W1.

Unit undersized for load. Decrease load or increase of size of unit. Restricted airflow. Remove restriction. Too much outdoor air. Check economizer position and configuration. Adjust mini-

Limit switch cycles main burners. Check rotation of blower, thermostat heat anticipator set-

Incomplete combustion (lack of combustion air) results in: Aldehyde odors, CO, sooting flame, or floating flame.

Unit is in Minimum on-time. Check using Unit running in Service Test Mode. Check using

Marquee.

Check using

ing gas line of air, allow gas to dissipate for at least 5 minutes before attempting to re-light unit.

ment in Installation, Start-up, and Service Manual. Allow time for W2 to energize.

mum position using

tings, and temperature rise of unit. Adjust as needed. Check all screws around flue outlets and burner compart-

ment. Tighten as necessary. Cracked heat exchanger, replace. Over-fire unit reduce input. Adjust gas line or manifold

pressure. Check vent for restriction. Clean as necessary. Check orifice to burner alignment.

Comfor t

Comfor t Comfor t

Comfor t

Link™ Scrolling

Link Scrolling Marquee.

Comfort

Link Scrolling Marquee

Link Scrolling Marquee. Link Scrolling Marquee.

No Heat.

Table 30 — Electric Heating Service Analysis

PROBLEM CAUSE REMEDY

Power failure. Call power company. Fuse blown or circuit breaker tripped. Check CB1,

CB2, and CB3. Thermostat occupancy schedule set point not call-

ing for Heating. No 24 VAC at primary contactor. Check transformer and circuit breaker. No power (high voltage) to L2 of primary contactor. Check safety switches “one-shot” backup and auto limit. Bad electrical elements. Power off unit and remove high voltage wires. Check resis-

Replace fuse or reset circuit breaker.

Check using

tance of heater, replace if open.

Comfort

Link Scrolling Marquee.

Page 38

LEGEND

IDM — IGC —

NOTE: Thermostat Fan Switch in the “AUTO” position.

Induced-Draft Motor Integrated Gas Unit Controller

Fig. 13 — IGC Control (Heating and Cooling)

Page 39

Thermistor Troubleshooting —

trol uses five 5K-thermistors (T1 through T5) to sense temperatures used to control operation of the unit. See Fig. 1 or 2. Resistances at various temperatures ar e listed in Tables 31 and

32. Thermistor pin connection points are shown in T abl e 2. The locations of the thermistors are shown on Fig. 4. When replacing thermistors T3 through T5, reuse the original hardware. These thermistors must be clamped tightly to the hairpins of the condenser.

The T55, T56, and T58 space temperature sensors use 10K thermistors. Resistances at vari ous temperatures are listed in T ables 33 and 34.

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

1. Connect the digital voltmeter across the appropriate thermistor term ina ls at the J8 terminal st rip o n the M a in Base Board (see Fig. 1).

2. Using the voltage reading obtained, read the sensor temperature from Tables 31-34.

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

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

Transducer Troubleshooting —

trol uses 3 suction pressure transducers to measure the suction

The electronic con-

pressure of circuits A, B, and C. The pressure/voltage characteristics of these transducers are in shown in Table 35. The accuracy of these transducers can be verified by connecting an accurate pressure gage to the second refrigerant port in the suction line.

START-UP

IMPORTANT: Do not attempt to start unit, even momentarily, until all items on the Start-Up Checklist (in installation instructions) and the following steps have been completed.

1. Verify unit has been instal led per t he Installation Instructions included in the unit installation packet.

2. Verify that all auxiliary components (thermostat, sensors, controls, etc.) have been in stalled and wired to the unit control box per these instructions, the unit Installation instructions, and the unit wiring label diagrams.

3. Set any control configurations that are required (fieldinstalled accessories, etc.). The unit is factory configured for all appropriate factory-installed options with the applicable controls, pre-programmed to the default values. See Table 16 and Table 17 for additional information on setting configurations.

4. Enter unit set points. The unit is shipped with the set point default values. If a different set point is required, change per directions in Tables 12 and 13.

5. Configure the Occupancy schedule.

6. Verify that the control time periods programmed meet current requirements.

7. Check all electrical connections to be sure that they are tight.

8. Start unit using Service Test mode to veri fy operation of all major components.

Page 40

TEMP

(F)

–25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10

–9 –8 –7 –6 –5 –4 –3 –2 –1

0 1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

Table 31 — Thermistor Temperature (F) vs Resistance/Voltage Drop Values for

OAT, SAT, and SCT Thermistors (5K at 25 C Resistors)

59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

VOLTAGE

DROP

(V)

1.982 7,686

1.956 7,665

1.930 7,468

1.905 7,277

1.879 7,091

1.854 6,911

1.829 6,735

1.804 6,564

1.779 6,399

1.754 6,238

1.729 6,081

1.705 5,929

1.681 5,781

1.656 5,637

1.632 5,497

1.609 5,361

1.585 5,229

1.562 5,101

1.538 4,976

1.516 4,855

1.493 4,737

1.470 4,622

1.448 4,511

1.426 4,403

1.404 4,298

1.382 4,196

1.361 4,096

1.340 4,000

1.319 3,906

1.298 3,814

1.278 3,726

1.257 3,640

1.237 3,556

1.217 3,474

1.198 3,395

1.179 3,318

1.160 3,243

1.141 3,170

1.122 3,099

1.104 3,031

1.086 2,964

1.068 2,898

1.051 2,835

1.033 2,773

1.016 2,713

0.999 2,655

0.983 2,597

0.966 2,542

0.950 2,488

0.934 2,436

0.918 2,385

0.903 2,335

0.888 2,286

0.873 2,239

0.858 2,192

0.843 2,147

0.829 2,103

0.815 2,060

0.801 2,018

0.787 1,977

0.774 1,937

0.761 1,898

0.748 1,860

0.735 1,822

0.723 1,786

0.710 1,750

0.698 1,715

0.686 1,680

0.674 1,647

0.663 1,614

0.651 1,582

0.640 1,550

0.629 1,519

0.618 1,489

0.608 1,459

0.597 1,430

0.587 1,401

0.577 1,373

0.567 1,345

0.557 1,318

0.548 1,291

0.538 1,265

0.529 1,240

0.520 1,214

RESISTANCE

(Ohms)

TEMP

(F)

143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225

VOLTAGE

DROP

(V)

3.699 98,010

3.689 94,707

3.679 91,522

3.668 88,449

3.658 85,486

3.647 82,627

3.636 79,871

3.624 77,212

3.613 74,648

3.601 72,175

3.588 69,790

3.576 67,490

3.563 65,272

3.550 63,133

3.536 61,070

3.523 59,081

3.509 57,162

3.494 55,311

3.480 53,526

3.465 51,804

3.450 50,143

3.434 48,541

3.418 46,996

3.402 45,505

3.386 44,066

3.369 42,679

3.352 41,339

3.335 40,047

3.317 38,800

3.299 37,596

3.281 36,435

3.262 35,313

3.243 34,231

3.224 33,185

3.205 32,176

3.185 31,202

3.165 30,260

3.145 29,351

3.124 28,473

3.103 27,624

3.082 26,804

3.060 26,011

3.038 25,245

3.016 24,505

2.994 23,789

2.972 23,096

2.949 22,427

2.926 21,779

2.903 21,153

2.879 20,547

2.856 19,960

2.832 19,393

2.808 18,843

2.784 18,311

2.759 17,796

2.735 17,297

2.710 16,814

2.685 16,346

2.660 15,892

2.634 15,453

2.609 15,027

2.583 14,614

2.558 14,214

2.532 13,826

2.506 13,449

2.480 13,084

2.454 12,730

2.428 12,387

2.402 12,053

2.376 11,730

2.349 11,416

2.323 11,112

2.296 10,816

2.270 10,529

2.244 10,250

2.217 9,979

2.191 9,717

2.165 9,461

2.138 9,213

2.112 8,973

2.086 8,739

2.060 8,511

2.034 8,291

2.008 8,076

RESISTANCE

(Ohms)

TEMP

(F)

100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142

VOLTAGE

DROP

(V)

0.511 1,190

0.502 1,165

0.494 1,141

0.485 1,118

0.477 1,095

0.469 1,072

0.461 1,050

0.453 1,029

0.445 1,007

0.438 986

0.430 965

0.423 945

0.416 925

0.408 906

0.402 887

0.395 868

0.388 850

0.381 832

0.375 815

0.369 798

0.362 782

0.356 765

0.350 750

0.344 734

0.339 719

0.333 705

0.327 690

0.322 677

0.317 663

0.311 650

0.306 638

0.301 626

0.296 614

0.291 602

0.286 591

0.282 581

0.277 570

0.272 561

0.268 551

0.264 542

0.259 533

0.255 524

0.251 516

0.247 508

0.243 501

0.239 494

0.235 487

0.231 480

0.228 473

0.224 467

0.220 461

0.217 456

0.213 450

0.210 445

0.206 439

0.203 434

0.200 429

0.197 424

0.194 419

0.191 415

0.188 410

0.185 405

0.182 401

0.179 396

0.176 391

0.173 386

0.171 382

0.168 377

0.165 372

0.163 367

0.160 361

0.158 356

0.155 350

0.153 344

0.151 338

0.148 332

0.146 325

0.144 318

0.142 311

0.140 304

0.138 297

0.135 289

0.133 282

RESISTANCE

(Ohms)

Page 41

TEMP

(C)

–32 –31 –30 –29 –28 –27 –26 –25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10

–9 –8 –7 –6 –5 –4 –3 –2 –1

10 11 12 13 14

VOLTAGE

DROP

(V)

3.705 100,260

3.687 94,165

3.668 88,480

3.649 83,170

3.629 78,125

3.608 73,580

3.586 69,250

3.563 65,205

3.539 61,420

3.514 57,875

3.489 54,555

3.462 51,450

3.434 48,536

3.406 45,807

3.376 43,247

3.345 40,845

3.313 38,592

3.281 38,476

3.247 34,489

3.212 32,621

3.177 30,866

3.140 29,216

3.103 27,633

3.065 26,202

3.025 24,827

2.985 23,532

2.945 22,313

2.903 21,163

2.860 20,079

2.817 19,058

2.774 18,094

2.730 17,184

2.685 16,325

2.639 15,515

2.593 14,749

2.547 14,026

2.500 13,342

2.454 12,696

2.407 12,085

2.360 11,506

2.312 10,959

2.265 10,441

2.217 9,949

2.170 9,485

2.123 9,044

2.076 8,627

2.029 8,231

Table 32 — Thermistor Temperature (C) vs Resistance/Voltage Drop Values for

OAT, SAT, and SCT Thermistors (5K at 25 C Resistors)

RESISTANCE

(Ohms)

TEMP

(C)

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

VOLTAGE

DROP

(V)

1.982 7,855

1.935 7,499

1.889 7,161

1.844 6,840

1.799 6,536

1.754 6,246

1.710 5,971

1.666 5,710

1.623 5,461

1.580 5,225

1.538 5,000

1.497 4,786

1.457 4,583

1.417 4,389

1.378 4,204

1.340 4,028

1.302 3,861

1.265 3,701

1.229 3,549

1.194 3,404

1.160 3,266

1.126 3,134

1.093 3,008

1.061 2,888

1.030 2,773

0.999 2,663

0.969 2,559

0.940 2,459

0.912 2,363

0.885 2,272

0.858 2,184

0.832 2,101

0.807 2,021

0.782 1,944

0.758 1,871

0.735 1,801

0.713 1,734

0.691 1,670

0.669 1,609

0.649 1,550

0.629 1,493

0.610 1,439

0.591 1,387

0.573 1,337

0.555 1,290

0.538 1,244

0.522 1,200

RESISTANCE

(Ohms)

TEMP

(C)

100 101 102 103 104 105 106 107

62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

VOLTAGE

DROP

(V)

0.506 1,158

0.490 1,118

0.475 1,079

0.461 1,041

0.447 1,006

0.433 971

0.420 938

0.407 906

0.395 876

0.383 836

0.371 805

0.360 775

0.349 747

0.339 719

0.329 693

0.319 669

0.309 645

0.300 623

0.291 602

0.283 583

0.274 564

0.266 547

0.258 531

0.251 516

0.244 502

0.237 489

0.230 477

0.223 466

0.217 456

0.211 446

0.204 436

0.199 427

0.193 419

0.188 410

0.182 402

0.177 393

0.172 385

0.168 376

0.163 367

0.158 357

0.154 346

0.150 335

0.146 324

0.142 312

0.138 299

0.134 285

RESISTANCE

(Ohms)

Page 42

TEMP

(F)

–25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10

–9 –8 –7 –6 –5 –4 –3 –2 –1

0 1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

Table 33 — Thermistor Temperature (°F) vs Resistance/Voltage Drop Values for

T55, T56, and T58 Space Temperature Sensors (10K at 25 C Resistors)

VOLTAGE DROP (V)

4.758 196,453

4.750 189,692

4.741 183,300

4.733 177,000

4.724 171,079

4.715 165,238

4.705 159,717

4.696 154,344

4.686 149,194

4.676 144,250

4.665 139,443

4.655 134,891

4.644 130,402

4.633 126,183

4.621 122,018

4.609 118,076

4.597 114,236

4.585 110,549

4.572 107,006

4.560 103,558

4.546 100,287

4.533 97,060

4.519 94,020

4.505 91,019

4.490 88,171

4.476 85,396

4.461 82,729

4.445 80,162

4.429 77,662

4.413 75,286

4.397 72,940

4.380 70,727

4.363 68,542

4.346 66,465

4.328 64,439

4.310 62,491

4.292 60,612

4.273 58,781

4.254 57,039

4.235 55,319

4.215 53,693

4.195 52,086

4.174 50,557

4.153 49,065

4.132 47,627

4.111 46,240

4.089 44,888

4.067 43,598

4.044 42,324

4.021 41,118

3.998 39,926

3.975 38,790

3.951 37,681

3.927 36,610

3.903 35,577

3.878 34,569

3.853 33,606

3.828 32,654

3.802 31,752

3.776 30,860

3.750 30,009

3.723 29,177

3.697 28,373

3.670 27,597

3.654 26,838

3.615 26,113

3.587 25,396

3.559 24,715

3.531 24,042

3.503 23,399

3.474 22,770

3.445 22,161

3.416 21,573

3.387 20,998

3.357 20,447

3.328 19,903

3.298 19,386

3.268 18,874

3.238 18,384

3.208 17,904

3.178 17,441

3.147 16,991

3.117 16,552

3.086 16,131

3.056 15,714

3.025 15,317

RESISTANCE

(Ohms)

TEMP

(F)

61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98

99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146

VOLTAGE DROP (V)

2.994 14,925

2.963 14,549

2.932 14,180

2.901 13,824

2.870 13,478

2.839 13,139

2.808 12,814

2.777 12,493

2.746 12,187

2.715 11,884

2.684 11,593

2.653 11,308

2.622 11,031

2.592 10,764

2.561 10,501

2.530 10,249

2.500 10,000

2.470 9,762

2.439 9,526

2.409 9,300

2.379 9,078

2.349 8,862

2.319 8,653

2.290 8,448

2.260 8,251

2.231 8,056

2.202 7,869

2.173 7,685

2.144 7,507

2.115 7,333

2.087 7,165

2.059 6,999

2.030 6,838

2.003 6,683

1.975 6,530

1.948 6,383

1.921 6,238

1.894 6,098

1.867 5,961

1.841 5,827

1.815 5,698

1.789 5,571

1.763 5,449

1.738 5,327

1.713 5,210

1.688 5,095

1.663 4,984

1.639 4,876

1.615 4,769

1.591 4,666

1.567 4,564

1.544 4,467

1.521 4,370

1.498 4,277

1.475 4.185

1.453 4,096

1.431 4,008

1.409 3,923

1.387 3,840

1.366 3,759

1.345 3,681

1.324 3,603

1.304 3,529

1.284 3,455

1.264 3,383

1.244 3,313

1.225 3,244

1.206 3,178

1.187 3,112

1.168 3,049

1.150 2,986

1.132 2,926

1.114 2,866

1.096 2,809

1.079 2,752

1.062 2,697

1.045 2,643

1.028 2,590

1.012 2,539

0.996 2,488

0.980 2,439

0.965 2,391

0.949 2,343

0.934 2,297

0.919 2,253

0.905 2,209

RESISTANCE

(Ohms)

TEMP

(F)

147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225

VOLTAGE DROP (V)

RESISTANCE

(Ohms)

0.890 2,166

0.876 2,124

0.862 2,083

0.848 2,043

0.835 2,003

0.821 1,966

0.808 1,928

0.795 1,891

0.782 1,855

0.770 1,820

0.758 1,786

0.745 1,752

0.733 1,719

0.722 1,687

0.710 1,656

0.699 1,625

0.687 1,594

0.676 1,565

0.666 1,536

0.655 1,508

0.645 1,480

0.634 1,453

0.624 1,426

0.614 1,400

0.604 1,375

0.595 1,350

0.585 1,326

0.576 1,302

0.567 1,278

0.558 1,255

0.549 1,233

0.540 1,211

0.532 1,190

0.523 1,169

0.515 1,148

0.507 1,128

0.499 1,108

0.491 1,089

0.483 1,070

0.476 1,052

0.468 1,033

0.461 1,016

0.454 998

0.447 981

0.440 964

0.433 947

0.426 931

0.419 915

0.413 900

0.407 885

0.400 870

0.394 855

0.388 841

0.382 827

0.376 814

0.370 800

0.365 787

0.359 774

0.354 762

0.349 749

0.343 737

0.338 725

0.333 714

0.328 702

0.323 691

0.318 680

0.314 670

0.309 659

0.305 649

0.300 639

0.296 629

0.292 620

0.288 610

0.284 601

0.279 592

0.275 583

0.272 574

0.268 566

0.264 557

Page 43

TEMP

(C)

–32 –31 –30 –29 –28 –27 –26 –25 –24 –23 –22 –21 –20 –19 –18 –17 –16 –15 –14 –13 –12 –11 –10

–9 –8 –7 –6 –5 –4 –3 –2 –1

0 1 2 3 4 5 6 7 8

9 10 11 12 13 14

Table 34 — Thermistor Temperatures (°C) vs Resistance/Voltage Drop Values for

T55, T56, and T58 Space Temperature Sensors (10K at 25 C Resistors)

VOLTAGE DROP (V)

4.762 200,510

4.748 188,340

4.733 177,000

4.716 166,342

4.700 156,404

4.682 147,134

4.663 138,482

4.644 130,402

4.624 122,807

4.602 115,710

4.580 109,075

4.557 102,868

4.533 97,060

4.508 91,588

4.482 86,463

4.455 81,662

4.426 77,162

4.397 72,940

4.367 68,957

4.335 65,219

4.303 61,711

4.269 58,415

4.235 55,319

4.199 52,392

4.162 49,640

4.124 47,052

4.085 44,617

4.044 42,324

4.003 40,153

3.961 38,109

3.917 36,182

3.873 34,367

3.828 32,654

3.781 31,030

3.734 29,498

3.686 28,052

3.637 26,686

3.587 25,396 3,537 24,171

3.485 23,013

3.433 21,918

3.381 20,883

3.328 19,903

3.274 18,972

3.220 18,090

3.165 17,255

3.111 16,474

RESISTANCE

(Ohms)

TEMP

(C)

15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61

VOLTAGE DROP (V)

3.056 15,714

3.000 15,000

2.944 14,323

2.889 13,681

2.833 13,071

2.777 12,493

2.721 11,942

2.666 11,418

2.610 10,921

2.555 10,449

2.500 10,000

2.445 9,571

2.391 9,164

2.337 8,776

2.284 8,407

2.231 8,056

2.178 7,720

2.127 7,401

2.075 7,096

2.025 6,806

1.975 6,530

1.926 6,266

1.878 6,014

1.830 5,774

1.784 5,546

1.738 5,327

1.692 5,117

1.648 4,918

1.605 4,727

1.562 4,544

1.521 4,370

1.480 4,203

1.439 4,042

1.400 3,889

1.362 3,743

1.324 3,603

1.288 3,469

1.252 3,340

1.217 3,217

1.183 3,099

1.150 2,986

1.117 2,878

1.086 2,774

1.055 2,675

1.025 2,579

0.996 2,488

0.968 2,400

RESISTANCE

(Ohms)

TEMP

(C)

62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98

99 100 101 102 103 104 105 106 107

VOLTAGE DROP (V)

0.940 2,315

0.913 2,235

0.887 2,157

0.862 2,083

0.837 2,011

0.813 1,943

0.790 1,876

0.767 1,813

0.745 1,752

0.724 1,693

0.703 1,637

0.683 1,582

0.663 1,530

0.645 1,480

0.626 1,431

0.608 1,385

0.591 1,340

0.574 1,297

0.558 1,255

0.542 1,215

0.527 1,177

0.512 1,140

0.497 1,104

0.483 1,070

0.470 1,037

0.457 1,005

0.444 974

0.431 944

0.419 915

0.408 889

0.396 861

0.386 836

0.375 811

0.365 787

0.355 764

0.345 742

0.336 721

0.327 700

0.318 680

0.310 661

0.302 643

0.294 626

0.287 609

0.279 592

0.272 576

0.265 561

RESISTANCE

(Ohms)

PRESSURE

(PSIG)

0 1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

Table 35 — Suction Pressure Transducer Pressure (PSIG) vs Voltage Drop Values for

SSP-A, SSP-B, and SSP-C

VOLTAGE DROP (V)

0.290

0.324

0.357

0.391

0.425

0.458

0.492

0.526

0.560

0.593

0.627

0.661

0.694

0.728

0.762

0.795

0.829

0.863

0.897

0.930

0.964

0.998

1.031

1.065

1.099

1.132

1.166

1.200

1.234

1.267

1.301

1.335

1.368

1.402

PRESSURE

(PSIG)

34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67

VOLTAGE DROP (V)

1.436

1.470

1.503

1.537

1.571

1.604

1.638

1.672

1.705

1.739

1.773

1.807

1.840

1.874

1.908

1.941

1.975

2.009

2.042

2.076

2.110

2.144

2.177

2.211

2.245

2.278

2.312

2.346

2.380

2.413

2.447

2.481

2.514

2.548

PRESSURE

(PSIG)

68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98

99 100 101

VOLTAGE DROP (V)

2.582

2.615

2.649

2.683

2.717

2.750

2.784

2.818

2.851

2.885

2.919

2.952

2.986

3.020

3.054

3.087

3.121

3.155

3.188

3.222

3.256

3.290

3.323

3.357

3.391

3.424

3.458

3.492

3.525

3.559

3.593

3.627

3.660

3.694

PRESSURE

(PSIG)

102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135

VOLTAGE

DROP (V)

3.728

3.761

3.795

3.829

3.862

3.896

3.930

3.964

3.997

4.031

4.065

4.098

4.132

4.166

4.200

4.233

4.267

4.301

4.334

4.368

4.402

4.435

4.469

4.503

4.537

4.570

4.604

4.638

4.671

4.705

4.739

4.772

4.806

4.840

Page 44

DESCRIPTION STATUS DEFAULT UNITS POINT

Number of Compressors

Compressor Min On Time Compressor Min Off Time Runtime to Reset Strikes Cool Stage Decrease Rate Cool Stage Increase Rate Fan-off Delay, Mech Cool Invert Evaporators Alert Each Strike Suction OK Temperature Low Suction — Level 1 Low Suction — Level 2 Low Suction — Level 3

APPENDIX A — CCN TABLES

UNIT (General Unit Configurations)

1 – 3 2: 12.5, 25 ton

3: 15, 18, 20 ton 120 – 999 180 sec MIN_ON 300 – 999 300 sec MIN_OFF 120 – 999 300 sec MIN_ON_S 120 – 999 300 sec STAGEDEC 120 – 999 450 sec STAGEINC 0 – 600 60 sec COOL_FOD Yes/No Yes INVERT_E Yes/No Yes ALM_NOW 10 – 50 18 dF SSTOK 10 – 50 20 dF SSTLEV1 5 – 50 15 dF SSTLEV2 0 – 50 10 dF SSTLEV3

NUM_COMP

Type of Heat Installed

Number of Heat Stages

Heat Minimum On Time Heat Minimum Off Time Heat Stage Decrease Rate Heat Stage Increase Rate Fan-off Delay, Elec Heat Fan-off Delay, Gas Heat

SAT Cool Demand (+) Level SAT Cool Demand (–) Level SAT Settling Time Minimum SAT Upper Level Minimum SAT Lower Level

A1 Current Sensing Circuit A Evaporator Pos Circuit A Level 1 Fans A Fan Lev1 ON Pressure A Fan Lev1 OFF Pressure Circuit A Level 2 Fans A Fan Lev2 ON Pressure A Fan Lev2 OFF Pressure

B1 Current Sensing Circuit B Evaporator Pos Circuit B Level 1 Fans B Fan Lev1 ON Pressure B Fan Lev1 OFF Pressure Circuit B Level 2 Fans B Fan Lev2 ON Pressure B Fan Lev2 OFF Pressure

0 = No Heat 1 = Gas 2 = Electric

1 – 2 2 (All units except 50HG014 with low heat)

60 – 999 120 sec HMIN_ON 60 – 999 120 sec HMIN_OFF 120 – 999 300 sec HSTAGDEC 120 – 999 450 sec HSTAGINC 10 – 600 30 sec ELEC_FOD 45 – 600 45 sec GAS_FOD

0.5 – 10.0 1.0 ^F SAT_POS

-10.0 – -0.5 -1.0 ^F SAT_NEG 10 – 900 240 sec SAT_SET

35.0 – 65.0 58.0 dF SATMIN_H

35.0 – 65.0 48.0 dF SATMIN_L

Enable/Disable Enable A1_SENSE 1 – 3 1 CIR_A_P 1 – 7 1 CIR_A_1 0 – 500.0 150.0 PSIG ALEV1ON 0 – 500.0 0.0 PSIG ALEV1OFF 1 – 7 3 CIR_A_2 0 – 500.0 200.0 PSIG ALEV2ON 0 – 500.0 100.0 PSIG ALEV2OFF

Enable/Disable Enable B1_SENSE 1 – 3 2 CIR_B_P 1 – 7 4 CIR_B_1 0 – 500.0 150.0 PSIG BLEV1ON 0 – 500.0 0.0 PSIG BLEV1OFF 1 – 7 6 CIR_B_2 0 – 500.0 200.0 PSIG BLEV2ON 0 – 500.0 100.0 PSIG BLEV2OFF

1: 48 Series

2: 50 Series with electric heat

0: 50 Series with no electric heat

1 (50HG014 with low heat)

HEATTYPE

NUM_HEAT

C1 Current Sensing Circuit C Evaporator Pos Circuit C Level 1 Fans C Fan Lev1 ON Pressure C Fan Lev1 OFF Pressure Circuit C Level 2 Fans C Fan Lev2 ON Pressure C Fan Lev2 OFF Pressure

Enable/Disable Enable C1_SENSE 1 – 3 3 CIR_C_P 1 – 7 5 CIR_C_1 0 – 500.0 150.0 PSIG CLEV1ON 0 – 500.0 0.0 PSIG CLEV1OFF 1 – 7 7 CIR_C_2 0 – 500.0 200.0 PSIG CLEV2ON 0 – 500.0 100.0 PSIG CLEV2OFF

Page 45

APPENDIX A — CCN TABLES (cont)

DESCRIPTION STATUS DEFAULT UNITS POINT Startup Delay (seconds) Unit Control Type

Thermostat Control Type

Fan On When Occupied Shut Down on IDF Failure Economizer Equipped Unit Fan Status Switch

Filter Status Switch

Fire Shutdown Switch

Remote Occupancy Switch

IAQ (Indoor Air Quality Configurations)

OPTIONS1 (Option Configurations)

0 – 600 30 sec STARTDLY 1 = AutoSelect

2 = Thermostat 3 = Space Sensor

0 = Adaptive 1 = 1 Stage Y1 2 = 2 Stage Y1

Yes/No Yes OCC_FAN Yes/No Yes FATALFAN Yes/No Yes ECONO 0 = Not Installed

1 = Normally Open 2 = Normally Closed

0 = Not Installed 1 = Normally Open 2 = Normally Closed

1 CTL_TYPE

0STATTYPE

0FANSTCFG

0: No FIOP 1: FIOP

0: No FIOP 2: FIOP

0 REMOCCFG

FILSTCFG

SHTDNCFG

DESCRIPTION STATUS DEFAULT UNITS POINT Minimum IAQ Position Economizer Min Position AQ Differential Low AQ Differential High

IAQ Sensor Value at 4mA IAQ Sensor Value at 20mA OAQ Sensor Value at 4mA OAQ Sensor Value at 20mA

OAQ Lockout Value

SEN_CAL (Space Temperature Sensor Calibration)

DESCRIPTION STATUS DEFAULT UNITS POINT Space Temperature Calibration Space Temperature Trim

0 – 30 10 % IAQMINP 0 – 100 30 % ECONOMIN 0 – 1000 100 DAQ_LOW 100 – 2000 700 DAQ_HIGH

0 – 5000 0 IAQ_4MA 0 – 5000 2000 IAQ_20MA 0 – 5000 0 OAQ_4MA 0 – 5000 2000 OAQ_20MA

600 OAQLOCK

–30 – 130 F SPT_CAL –30 – 30 0 ^F SPT_OFF

Page 46

APPENDIX A — CCN TABLES (cont)

ECONOCFG (Economizer Configurations)

DESCRIPTION STATUS DEFAULT UNITS POINT Economizer Control Board Installed Economizer Min Position Econ High Temp Lockout Econ Low Temp Lockout Unoccupied Free Cooling

Yes/No Yes ECB_ECON 0 – 100 30 % ECONOMIN 55 – 75 65 dF OATLECLH 0 – 50 30 dF OATLECLL Enable/Disable FC_ENABL

Power Exhaust Control

PE Stage1 Econo Position PE Stage2 Econo Position

Enthalpy Switch

Economizer Travel Time Bottom Stage Max Econmzr Middle Stage Max Econmzr Top Stage Max Econmzr Economizer PID Deadband Economizer PID – kP Economizer PID – kI Economizer PID – kD Economizer PID – rate

DESCRIPTION STATUS DEFAULT UNITS POINT Occupied Cool Set point Occupied Heat Set point Unoccupied Cool Set point Unoccupied Heat Set point Heat-Cool Set point Gap

Enable/Disable Disable : NO FIOP

0 – 100 25 % PE1_POS 0 – 100 75 % PE2_POS

0 = Not Installed 1 = Normally Open 2 = Normally Closed

5 – 300 150 sec ECONOTRV 0 – 100 50 % ECONMAXB 0 – 100 25 % ECONMAXM 0 – 100 0 % ECONMAXT 0 – 25 3 % ECONBAND

0.0 – 99.9 2.5 ECONO_P

0.0 – 99.9 .12 ECONO_I

0.0 – 99.9 1 ECONO_D

0.0 – 99.9 15.0 sec ECONO_DT

Enable: FIOP

0 ENTHLCFG

PE_ENABL

SET_PNT (Unit Set Points)

55 – 80 78 dF OCSP 55 – 80 68 dF OHSP 75 – 95 85 dF UCSP 40 – 80 60 dF HCSP 2 – 10 5 ^F HCSP_GAP

Heating Lockout Temp Compressor Lockout Temp Econ High Temp Lockout Econ Low Temp Lockout

Minimum SAT Upper Level Minimum SAT Lower Level Low Cool SAT Set point High Cool SAT Set point

55 – 90 75 dF OATLHEAT 0 – 75 0 dF OATLCOMP 40 – 75 65 dF OATLECLH 0 – 50 0 dF OATLECLL

35 – 65 58 dF SATMIN_H 35 – 65 48 dF SATMIN_L 55 – 75 65 dF LCSASP 50 – 70 55 dF HCSASP

Page 47

APPENDIX A — CCN TABLES (cont)

GENERAL

DESCRIPTION STATUS UNITS POINT FORCIBLE UNIT: Currently Occupied Supply Air Temperature Outdoor Air Temperature Space Temperature Space Temperature Offset Cooling Demand Heating Demand Unit Shutdown Input Fan Status Filter Status Remote Occupancy Input Indoor Fan Indoor Fan Feedback Indoor Fan Power Outdoor Fan Contactor 1 Outdoor Fan Contactor 2 Outdoor Fan Contactor 3

Yes/No OCCUPIED Y snnn.n dF SAT N snnn.n dF OAT Y snnn.n dF SPT Y sn.n dF SPTO Y snn.n ^F COOL_DMD N snn.n ^F HEAT_DMD N On/Off FIREDOWN Y On/Off FAN_STAT N Dirty/Clean FILTSTAT N On/Off REM_OCC Y On/Off IDF N On/Off IDF_FDBK N On/Off IDFPWR N On/Off OFC_1 N On/Off OFC_2 N On/Off OFC_3 N

Heat Stage 1 Heat 1 Timeguard (secs) Heat Stage 2 Heat 2 Timeguard (secs)

CIRCUIT A: Saturated Suct Temp A Saturated Suct Press A Saturated Cond Temp A Saturated Cond Press A Compressor A1 A1 Current Sensor A1 Timeguard (secs) Circuit A Fan Level Circuit A Strikes

CIRCUIT B: Saturated Suct Temp B Saturated Suct Press B Saturated Cond Temp B Saturated Cond Press B Compressor B1 B1 Current Sensor B1 Timeguard (secs) Circuit B Fan Level Circuit B Strikes

On/Off HEAT_1 N Nnn TIMGD_H1 N On/Off HEAT_2 N nnn TIMGD_H2 N

snnn.n dF SST_A N nnn.n PSIG SSP_A N snnn.n dF SCT_A N

0.0 PSIG SCP_A N On/Off COMP_A1 N On/Off CS_A1 N nnn TIMGD_A1 N n A_FANLEV N n ASTRIKES N

snnn.n dF SST_B N nnn.n PSIG SSP_B N snnn.n dF SCT_B N

0.0 PSIG SCP_B N On/Off COMP_B1 N On/Off CS_B1 N nnn TIMGD_B1 N n B_FANLEV N n BSTRIKES N

CIRCUIT C: Saturated Suct Temp C Saturated Suct Press C Saturated Cond Temp C Saturated Cond Press C Compressor C1 C1 Current Sensor C1 Timeguard (secs) Circuit C Fan Level Circuit C Strikes

snnn.n dF SST_C N nnn.n PSIG SSP_C N snnn.n dF SCT_C N

0.0 PSIG SCP_C N On/Off COMP_C1 N On/Off CS_C1 N nnn TIMGD_C1 N n C_FANLEV N n CSTRIKES N

Page 48

APPENDIX A — CCN TABLES (cont)

TSTAT (Thermostat)

DESCRIPTION STATUS UNITS POINT FORCIBLE Thermostat Y1 Input Thermostat Y2 Input Thermostat W1 Input Thermostat W2 Input Thermostat G Input

DESCRIPTION STATUS UNITS POINT FORCIBLE Economizer Power Economizer Commanded Pos Economizer Position Minimum Position in Effect

On/Off Y1 Y On/Off Y2 Y On/Off W1 Y On/Off W2 Y On/Off G Y

ECONOMZR (Economizer)

On/Off ECON_PWR N nn % ECONOCMD N nn % ECONOPOS N Nnn % MIN_POS N

Supply Air Temperature Supply Air Temp Demand

Enthalpy Indoor Air Quality Outdoor Air Quality Power Exhaust Relay 1 Power Exhaust Relay 2

snnn.n dF SAT N snn.n ^F SAT_DMD N

High/Low ENTHALPY Y nnnn IAQ Y nnnn OAQ Y On/Off PE_1 N On/Off PE_2 N

Page 49

APPENDIX A — CCN TABLES (cont)

COOLING

DESCRIPTION STATUS UNITS POINT FORCIBLE

In Cooling Mode?

Ye s / N o I N _ C O O L N

Outdoor Air is Cool OK to Use Compressors Available Cooling Stages Requested Cooling Stages Actual Cooling Stages Compressor A1 Compressor B1 Compressor C1

Space Temperature Cooling Demand Cool Demand d/dt (F/min) Supply Air Temperature Supply Air d/dt (F/min) Supply Air Temp Demand SAT Delta Reference Temp Economizer Position

Cool Thermal Lag Factor SPT Cool Demand(+) Level SPT Cool Demand(-) Level SAT Cool Demand(+) Level SAT Cool Demand(-) Level MET2Add SAT Trend Level

Yes/No OAT_COOL N Yes/No MECHCOOL N nAVLCSTGSN nREQCSTGSN n ACTCSTGS N On/Off COMP_A1 N On/Off COMP_B1 N On/Off COMP_C1 N

snnn.n dF SPT Y snn.n ^F COOL_DMD N snnn.n CLDTREND N snnn.n dF SAT N snnn.n SATTREND N snn.n ^F SAT_DMD N snnn.n dF SAT_REF N nnn % ECONOPOS N

n.n COOL_LAG Y n.n ^F DEM_POS Y sn.n ^F DEM_NEG Y n.n ^F SAT_POS Y sn.n ^F SAT_NEG Y sn.n ^F M2ADC.T Y

HEATING

DESCRIPTION STATUS UNITS POINT FORCIBLE

in Heating Mode?

OK to Use Heat Available Heating Stages Requested Heating Stages Actual Heating Stages Heat Stage 1 Heat Stage 2

Space Temperature Heating Demand Heat Demand d/dt (F/min) Supply Air Temperature Supply Air d/dt (F/min)

Heat Thermal Lag Factor SPT Heat Demand (+) Level SPT Heat Demand (-) Level

Ye s / N o I N _ H E AT N

Yes/No OKTOHEAT N nAVLHSTGSN nREQHSTGSN n ACTHSTGS N On/Off HEAT_1 N On/Off HEAT_2 N

snnn.n dF SPT Y snn.n ^F HEAT_DMD N snnn.n HTDTREND N snnn.n dF SAT N snnn.n SATTREND N

n.n HEAT_LAG Y n.n ^F HDEM_POS Y sn.n ^F HDEM_NEG Y

STATUS (Status of Modes)

SYSTEM MODE:

HVAC MODE:

Level 1 Description Level 2 Description Level 3 Description

Page 50

APPENDIX A — CCN TABLES (cont)

DESCRIPTION STATUS DEFAULT UNITS POINT

ALARM OUTPUT ACTIVE FOR:

Space Sensor Failure SAT Thermistor Failure OAT Thermistor Failure Current Sensor Failure Compressor Failure Refrig Circuit Failure Thermostat Failure Economizer Failure SSP Transducer Failure SCT Thermistor Failure Indoor Fan Failure Plugged Filter

STRTHOUR (Component Hours and Cycles)

DESCRIPTION STATUS UNITS POINT Compressor A1 Run Hours Compressor B1 Run Hours Compressor C1 Run Hours Compressor A1 Cycles Compressor B1 Cycles Compressor C1 Cycles

ALARMOUT

Yes/No Yes SPT_AL Yes/No Yes SAT_AL Yes/No Yes OAT_AL Ye s / N o Ye s C S _ A L Ye s / N o Ye s C O M P _ A L Yes/No Yes CKT_AL Yes/No Yes TSTAT_AL Yes/No Yes ECON_AL Yes/No Yes SSP_AL Yes/No Yes SCT_AL Yes/No Yes FAN_AL Ye s / N o Ye s F I LT _ A L

nnnnn.nn hours HR_A1 nnnnn.nn hours HR_B1 nnnnn.nn hours HR_C1 nnnnnn CY_A1 nnnnnn CY_B1 nnnnnn CY_C1

Indoor Fan Run Hours Indoor Fan Cycles

OD Fan Cont. 1 Run Hours OD Fan Cont. 2 Run Hours OD Fan Cont. 3 Run Hours OD Fan Contact. 1 Cycles OD Fan Contact. 2 Cycles OD Fan Contact. 3 Cycles

Heat Stage 1 Run Hours Heat Stage 2 Run Hours Heat Stage 1 Cycles Heat Stage 2 Cycles

Power Exhaust1 Run Hours Power Exhaust2 Run Hours Power Exhaust 1 Cycles Power Exhaust 2 Cycles

Economizer Pwr Run Hours Economizer Power Cycles

Alarm Output Run Hours Alarm Output Cycles

nnnnn.nn hours HR_IDF nnnnnn CY_IDF

nnnnn.nn hours HR_OFC_1 nnnnn.nn hours HR_OFC_2 nnnnn.nn hours HR_OFC_3 nnnnnn CY_OFC_1 nnnnnn CY_OFC_2 nnnnnn CY_OFC_3

nnnnn.nn hours HR_HTR_1 nnnnn.nn hours HR_HTR_2 nnnnnn CY_HTR_1 nnnnnn CY_HTR_2

nnnnn.nn hours HR_PE_1 nnnnn.nn hours HR_PE_2 nnnnnn CY_PE_1 nnnnnn CY_PE_2

nnnnn.nn hours HR_ECPWR nnnnnn CY_ECPWR

nnnnn.nn hours HR_ALM nnnnnn CY_ALM

VERSIONS

DESCRIPTION VERSION NUMBER STATUS MBB ECB MARQUEE

CESR131278- nn-nn CESR131249- nn-nn CESR131171- nn-nn

Page 51

DESCRIPTION STATUS DEFAULT UNITS POINT

CCN Time/Date Broadcast

CCN OAT Broadcast

Global Schedule Broadcast

CCN Broadcast Ackr

Daylight Savings Start

Start Month

Start Week

Start Day

Minutes to add

Daylight Savings Stop

Stop Month

Stop Week

Stop Day

Minutes to subtract

DESCRIPTION STATUS POINT Current Mode (1=Occup.) Current Occup. Period # Timed-Override in Effect Time-Override Duration Current Occupied Time Current Unoccupied Time Next Occupied Day Next Occupied Time Next Unoccupied Day Next Unoccupied Time Previous Unoccupied Day Previous Unoccupied Time

APPENDIX A — CCN TABLES (cont)

BRODEFS (Broadcast POC Definition Table)

Yes/No No CCNBC Yes/No No OATBC Yes/No No GSBC Yes/No No CCNBCACK

1 to 12 4 STARTM 1 to 5 1 STARTW 1 to 7 7 STARTD 0 to 60 60 min MINADD

1 to 12 10 STOPM 1 to 5 5 STOPW 1 to 7 7 STOPD 0 to 60 60 min MINSUB

OCCUPANCY MAINTENANCE TABLE

OCCUPANCY SUPERVISORY

0,1 MODE 0-8 PER-NO Yes/No OVERLAST 0-4 hours OVR_HRS hh:mm STRTTIME hh:mm ENDTIME

NXTOCDAY

hh:mm NXTOCTIM

NXTUNDAY

hh:mm NXTUNTIM

PRVUNDAY

hh:mm PRVUNTIM

DISPLAY (STDU SETUP)

DESCRIPTION STATUS DEFAULT UNITS POINT Service Password Password Enable Metric Display Language Selection

nnnn 1111 PASSWORD Enable/Disable Enable PASS_EBL Off/On Off DISPUNIT 0 = ENGLISH

1 = FRANCAIS 2 = ESPANOL 3 = PORTUGUES

0LANGUAGE

SCHEDOVR (TIMED OVERRIDE SETUP)

DESCRIPTION STATUS DEFAULT UNITS POINT Schedule Number Accept Global Holidays Override Time Limit Timed Override Hours Timed Override

0-99 0 SCHEDNUM

Yes/No Yes HOLIDAYT

0-4 4 hours OTL 0-4 0 hours OTL_EXT

Yes/No Yes TIMEOVER

Page 52

APPENDIX A — CCN TABLES (cont)

ALARMDEF (Alarm Definition Table)

DESCRIPTION STATUS DEFAULT UNITS POINT Alarm Routing Control Equipment Priority Comm Failure Retry Time Re-alarm Time Alarm System Name

DESCRIPTION STATUS UNITS POINT Reset All Current Alarms Reset Alarm History

00000000 00000000 ALRM_CNT 0 to 7 4 EQP_TYPE 1 to 240 10 min RETRY_TM 1 to 255 30 min RE-ALARM XXXXXXXX 48/50HG ALRM_NAM

ALARMS

No ALRESET No ALHISCLR

Circuit A Strikes Circuit B Strikes Circuit C Strikes

Active Alarm #1 Active Alarm #2 Active Alarm #3 Active Alarm #4 Active Alarm #5 Active Alarm #6 Active Alarm #7 Active Alarm #8 Active Alarm #9 Active Alarm #10 Active Alarm #11 Active Alarm #12 Active Alarm #13 Active Alarm #14 Active Alarm #15 Active Alarm #16 Active Alarm #17 Active Alarm #18 Active Alarm #19 Active Alarm #20 Active Alarm #21 Active Alarm #22 Active Alarm #23 Active Alarm #24 Active Alarm #25

NOTE: Alerts will displayed as Txxx.

n ASTRIKES n BSTRIKES n CSTRIKES

Axxx or Txxx ALARM01C Axxx or Txxx ALARM02C Axxx or Txxx ALARM03C Axxx or Txxx ALARM04C Axxx or Txxx ALARM05C Axxx or Txxx ALARM06C Axxx or Txxx ALARM07C Axxx or Txxx ALARM08C Axxx or Txxx ALARM09C Axxx or Txxx ALARM10C Axxx or Txxx ALARM11C Axxx or Txxx ALARM12C Axxx or Txxx ALARM13C Axxx or Txxx ALARM14C Axxx or Txxx ALARM15C Axxx or Txxx ALARM16C Axxx or Txxx ALARM17C Axxx or Txxx ALARM18C Axxx or Txxx ALARM19C Axxx or Txxx ALARM20C Axxx or Txxx ALARM21C Axxx or Txxx ALARM22C Axxx or Txxx ALARM23C Axxx or Txxx ALARM24C Axxx or Txxx ALARM25C

Page 53

Page 54

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

Book1144 Tab 1a1b6a6b

PC 111 Catalog No. 534-80090 Printed in U.S.A. Form 48/50HG-2T Pg 54 202 10-01 Replaces: 48/50HG-1T

Page 55

CONTROL SET-UP CHECKLIST

Model Number: ____________________________________ Software Versions: ____________________________________ Serial Number:_____________________________________ MBB: CESR131278-00- __ __ Date: ____________________________________________ SCB/ECB: CESR131249-00- __ __ T echnician:________________________________________ MARQ: CESR131171-01- __ __

INDICATE UNIT SETTINGS BELOW

Control Type: Thermostat / T55 Space Temp. / T56 Space T emp. / T58 Space T emp. Set Points: Cooling Occupied:___________ Unoccupied:____________

Heating Occupied:___________ Unoccupied:____________

Configurations SETTING Default UNIT

U.CTL ________ Auto Thermostat Space Sensor T .CTL ________ Adaptive 1 Stage Y1 2 Stage Y1 OC.FN ________ Y N S.DLY ________ 30 IDF .F ________ N Y FN.SW ________ No Switch Normal Open Normal Close FL.SW ________ No Switch Normal Open Normal Close FS.SW ________ No Switch Normal Open Normal Close RM.SW ________ No Switch Normal Open Normal Close ECB ________ Y N SAT.T ________ 240

COOL

N.CMP ________ 3 (016-024) or 2 (014,028) MC.LO ________ 0° F MRT.C ________ 180 sec MOT .C ________ 300 sec CL.PD ________ 1.0 ∆F CL.ND ________ –1.0 ∆F C.LAG ________ 1.0 min SA.PD ________ 1.0 ∆F SA.ND ________ –1.0 ∆F C.INC ________ 450 sec C.DEC ________ 300 sec A.NOW ________ Y N INV.E ________ Y N A1.CS ________ Y N B1.CS ________ Y N C1.CS ________ Y N

HEAT

→

HT.TY ________ No Heat GAS ELECTRIC N.HTR ________ 2 HT .LO ________ 75 F MRT.H ________ 120 sec MOT .H ________ 120 sec HT .PD ________ 1.0 ∆F HT.N D ________ –1.0 ∆F H.LAG ________ 1.0 min H.INC ________ 450 sec

H.DEC ________ 300 sec

CL-1

202

Page 56

ECON

IAQ

CCN

DISP

ALRM

EC.EQ ________ N Y MIN.P ________ 30 % ECL.H ________ 65 F ECL.L ________ 0° F FC.EN ________ Y N EN.SW ________ No Switch Normal Open Normal Close PE.EN ________ N Y PE1.P ________ 25 % PE2.P ________ 75 %

AQ.MP ________ 10 % MIN.P ________ 30 % AQD.L ________ 100 PPM AQD.H ________ 700 PPM I.4M ________ 0 PPM I.20M ________ 2000 PPM O.4M ________ 0 PPM O.20M ________ 2000 PPM OAQ.L ________ 600 PPM

CCN.A ________ 1 CCN.B ________ 0 BAUD ________ 3 (9600 baud) B.TIM ________ OFF ON B.OAT ________ OFF ON B.ES ________ OFF ON B.ACK ________ OFF ON

METR ________ N Y LANG ________ 0 (English) PROT ________ Disabled Enabled PSWD ________ 1111

A.SPT ________ Y N A.SAT ________ Y N A.OAT ________ Y N A.CS ________ Y N A.CMP ________ Y N A.CKT ________ Y N A.SSP ________ Y N A.SCT ________ Y N A.F AN ________ Y N A.FIC ________ Y N A.TST ________ Y N A.ECO ________ Y N

CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE

Time/Date Set Y N Occupancy Schedule Number 0 1-64 65-99 Occupancy Schedules Set Y N Holiday Schedules Set Y N Correct Compressor Rotation Verified Y N Installation Checklist Completed Y N

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

Book1144 Tab 1a1b6a6b

PC 111 Catalog No. 534-80090 Printed in U.S.A. Form 48/50HG-2T Pg CL-2 202 10-01 Replaces: 48/50HG-1T

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - -

Carrier 48HG014, 48HG028, 50HG028, 50HG014, 48HG024 Controls Operation And Troubleshooting

Specifications and Main Features

Frequently Asked Questions

User Manual