Carrier 48HG014 Controls Operation And Troubleshooting
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Carrier 48HG014 Controls Operation And Troubleshooting

Carrier 48HG014 Controls Operation And Troubleshooting

Single package large rooftop units with comfortlink controls
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Controls Operation and Troubleshooting
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . . .1-11

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Economizer Control Board (ECB) . . . . . . . . . . . . . . . . 2
Scrolling Marquee Display . . . . . . . . . . . . . . . . . . . . . . . 2
Board Addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Control Module Communication. . . . . . . . . . . . . . . . . . 2
Carrier Comfort Network Interface. . . . . . . . . . . . . . . . 2
Field-Installed Accessories . . . . . . . . . . . . . . . . . . . . . . 2
• SPACE TEMPERATURE SENSOR (T56)
• SPACE TEMPERATURE SENSOR (T58)
• ECONOMIZER
CONTROLS AND FUNCTIONS . . . . . . . . . . . . . . . . 11-25
Marquee Display Usage . . . . . . . . . . . . . . . . . . . . . . . . . 11
Clearing Unit Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-31
Unit Control Type (U.CTL) . . . . . . . . . . . . . . . . . . . . . . . 26
Occupancy Determination. . . . . . . . . . . . . . . . . . . . . . . 26
Indoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Outdoor Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Indoor Air Quality (IAQ) . . . . . . . . . . . . . . . . . . . . . . . . . 27
Power Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Compressor Staging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Heating (48HG Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Heating (50HG Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
• THERMOSTAT CONTROL
• SPACE SENSOR CONTROL
and Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Alarm Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 31-39
Complete Unit Stoppage . . . . . . . . . . . . . . . . . . . . . . . . 31
Single Circuit Stoppage . . . . . . . . . . . . . . . . . . . . . . . . . 31
Service Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Restart Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Book 1
1
4
4
Tab
1a 1b 6a 6b
Single Package Large Rooftop Units
Catalog No. 534-80090
Printed in U.S.A.
48/50HG014-028
with ComfortLink™ Controls
Thermistor Troubleshooting. . . . . . . . . . . . . . . . . . . . . 39
Transducer Troubleshooting . . . . . . . . . . . . . . . . . . . . 39
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-43
APPENDIX A - CCN TABLES . . . . . . . . . . . . . . . . 44-52
CONTROL SET-UP CHECKLIST . . . . . . . . . .CL-1, CL-2

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. 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 glasses 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
48/50HG014
48/50HG016
48/50HG020
48/50HG024
48/50HG028

MAJOR SYSTEM COMPONENTS

General -
The 48/50HG single package rooftop units with
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 opera-
tions 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 the
major portion of the operating software and controls the opera-
tion 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
Form 48/50HG-2T
Pg 1
202
Page
NOMINAL TONS
1
12
/
2
15
18
20
25
See Fig. 5. The MBB is
10-01
Replaces: 48/50HG-1T

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  • Page 1: Table Of Contents

    • YELLOW LED be hazardous due to system pressure and electrical compo- Carrier Comfort Network Interface....2 nents. Only trained and qualified service personnel should Field-Installed Accessories .

  • Page 2: Economizer Control Board (Ecb)

    R and W1 when using a T55 device. See Fig. 8-10. YELLOW LED — The MBB has one yellow LED. The SPACE TEMPERATURE SENSOR (T56) — The T56 Space Carrier Comfort Network (CCN) LED will blink during times Temperature Sensor (Part No. CEC0121503-01) is a field- of network communication.
  • Page 5 Fig. 3 — Typical Power Schematic...
  • Page 7 RED LED - STATUS GREEN LED - YELLOW LED - LEN (LOCAL EQUIPMENT NETWORK) CCN (CARRIER COMFORT NETWORK) INSTANCE JUMPER CEPL130346-01 STATUS Fig. 5 — Main Base Board Table 2 — Thermistor and Transducer Designations SENSOR CONNECTION FUNCTION AND LOCATION PART NO.
  • Page 8 Table 3 — Discrete or Digital Inputs TERMINAL INPUT CONNECTION CONNECTION COMMENT POINT POINT Compressor Part No. = HK50AA035 J9 — 10,11,12 (MBB) — Current Sensor A1 Compressor J9 — 7,8,9 (MBB) — Current Sensor B1 Compressor J9 — 4,5,6 (MBB) —...
  • Page 9 Table 4 — Additional Analog Inputs TERMINAL INPUT CONNECTION CONNECTION COMMENT POINT POINT J8 — 1,2 (MBB) TB3 — 7,8 Part No. = CEC0121448-01 Space Temperature (SPT) Space Temperature (SPT) and Space J8 — 1,2,3 (MBB) TB3 — 7,8,9 Part No. = CEC0121503-01 Temperature Offset (SPTO) Indoor Air Quality (IAQ) J5 —...

  • Page 10: Space Temperature Sensor (T55)

    RED(+) WHT(GND) CCN COM BLK(-) BLK (GND) SENSOR WIRING RED (SPT) Cool Warm Fig. 8 — Space Temperature Sensor (P/N CEC0121503-01 Shown) Fig. 10 — T55 Space Temperature Sensor Wiring (P/N CEC0121448-01) RED(+) WHT(GND) CCN COM BLK(-) (T56) BLK (GND) SENSOR WIRING RED (SPT) JUMPER...

  • Page 11: Space Temperature Sensor Calibration

    SPACE TEMPERATURE SENSOR (T58) — The T58 Space CONTROLS AND FUNCTIONS Temperature Sensor (Part No. CEPL130464-01) is a field- Marquee Display Usage — See Fig. 7 and Tables 7-21. installed accessory. The T58 sensor communicates with the ComfortLink™ controller, providing space temperature, heat- The display module provides the user interface to the ing and cooling set points, and mode operation information.

  • Page 12: Service Test

    Service Test — turned on again after a small delay. The ECON setting, as a The Service Test function can be used to member of INDP, would not be affected. verify proper operation of compressors, indoor, outdoor and This system of dependent and independent submodes was power exhaust fans, heaters, economizer and alarm relay.
  • Page 13 Table 8 — “Run Status” Mode and Submode Directory KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT ENTRY VIEW Auto View of Run Status ENTER XXX.X Supply Air Temperature YES/NO Currently Occupied ALRM Current Alarms & Alerts TIME XX.XX Time of Day 00.00 –...
  • Page 14 Table 9 — “Service Test” Mode and Submode Directory KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT ENTRY TEST ON/OFF Field Service Test Mode Use to Enable/Disable Manual Mode ENTER INDP Test Independent Outputs ENTER ECON Economizer Position Test E.PWR ON/OFF Economizer Power Test E.CAL ON/OFF...
  • Page 15 Table 11 — “Pressures” Mode and Submode Directory KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT ENTRY 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...
  • Page 16 Table 14 — “Inputs” Mode and Submode Directory KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION ENTRY STAT Thermostat Inputs ENTER ON/OFF Thermostat Y1 Input ON/OFF Thermostat Y2 Input ON/OFF Thermostat W1 Input ON/OFF Thermostat W2 Input ON/OFF Thermostat G Input SW.IN Switch Inputs ENTER FIL.S...
  • Page 17 Table 16 — “Configuration” Mode and Submode Directory KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT ENTRY UNIT Unit Configuration ENTER Default: 1 1 = Auto Select U.CTL Unit Control Type 2 = Thermostat 3 = Space Sensor Default: 0 0 = Adaptive T.CTL Thermostat Control Type 1 = 1 Stage Y1...
  • Page 18 Table 16 — “Configuration” Mode and Submode Directory (cont) KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT ENTRY HEAT Heating Configuration ENTER Default: 0 0: No Heat HT.TY Type of Heat Installed 1: Gas 2: Electric N.HTR Number of Heat Stages Default: 2 HT.LO Heating Lockout Temp...
  • Page 19 A.ECO YES/NO Economizer Failure Default: YES LEGEND — Air Quality — Outdoor-Air Temperature — Carrier Comfort Network — Power Exhaust — EconoMi$er Control Board — Supply Air Temperature — Indoor-Air Quality — Saturated Condensing Temperature OAQ — Outdoor-Air Quality — Space Temperature Table 17 —...
  • Page 20 Table 18 — “Time Clock” Mode and Submode Directory SUB-SUB KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT MODE ENTRY TIME XX.XX Hour and Minute Military (00.00-23.59) TIME ENTER DATE Current Date ENTER MNTH Month of Year 1=Jan, 2=Feb, etc. Day of Month Range 1-31 YEAR XXXX...
  • Page 21 Table 18 — “Time Clock” Mode and Submode Directory (cont) SUB-SUB KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT MODE ENTRY SCH.L PER.2 MON.2 YES/NO Monday In Period Default = No (cont) (cont) TUE.2 YES/NO Tuesday In Period Default = No WED.2 YES/NO Wednesday In Period...
  • Page 22 Table 18 — “Time Clock” Mode and Submode Directory (cont) SUB-SUB KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT MODE ENTRY SCH.L PER.5 SUN.5 YES/NO Sunday In Period Default = No (cont) (cont) HOL.5 YES/NO Holiday In Period Default = No ESCAPE PER.6 Occupancy Period 6...
  • Page 23 Table 18 — “Time Clock” Mode and Submode Directory (cont) SUB-SUB KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT MODE ENTRY HOL.G YES/NO Accept Global Holidays Default: YES HOL.G ENTER HOL.L Local Holiday Schedule ENTER HOL.1 Holiday 1 ENTER MTH.1 Holiday Start Month Default: 0 DAY.1 Holiday Start Day...
  • Page 24 Table 19 — Setting an Occupied Time Schedule – Weekdays Only for 7:30 to 22:30 SUB-SUB KEYPAD SUBMODE ITEM DISPLAY ITEM EXPANSION COMMENT MODE ENTRY SCH.L Local Occupancy Schedule ENTER PER.1 OCC.1 Period Occupied Time ENTER 00.00 Scrolling stops ENTER 00.00 Hours Flash ENTER...
  • Page 25 Table 20 — “Operating Modes” Mode and Submode Directory KEYPAD SUBMODE ITEM DISPLAY COMMENT ENTRY Item expansion changes as a function of system status Item expansion changes as a function of the HVAC status. HVAC Table 21 — “Alarms” Mode and Submode Directory KEYPAD SUBMODE ITEM...

  • Page 26: Operation

    OPERATION and Global Schedule Broadcast can be found on the Scrolling Marquee under Configuration/CCN. Unit Control Type (U.CTL) — The control method is a. SCH.N = 0: The unit is always considered occu- determined by Unit Control Type, which can be found in pied and the programmed schedule is ignored.

  • Page 27: Outdoor Fans

    Outdoor Fans — Table 24 — Fan Level Control of The operation of the outdoor fans Outdoor Fan Contactors (1,2,3) depends on the on/off status and discharge pressure, measured by the condensing temperature thermistors, of each circuit. CIRCUIT Depending upon these values, the “fan level” for each circuit FAN LEVEL will be either 0, 1, or 2 as defined by Table 23.

  • Page 28: Power Exhaust

    ECONOMIZER MINIMUM DAMPER POSITION (MIN. P) VENTILATION FOR PEOPLE MINIMUM DAMPER POSITION (AQ.MP) VENTILATION FOR SOURCES INSIDE/OUTSIDE CO DIFFERENTIAL 1100 INSIDE CO CONCENTRATION DIFFERENTIAL DIFFERENTIAL LOW (AQD.L) HIGH (AQD.H) → Fig. 12 — IAQ Control Power Exhaust — the stages must be removed in the opposite order. In all cases, To enable power exhaust, PE.EN the minimum on-time of 3 minutes (MRT.C) and the minimum must be set to YES.

  • Page 29: Space Sensor Control

    The burners will ignite within 5 seconds. If the burners do correct number of stages is between 1 and 2, this method will not light, there is a 22-second delay before another 5-second cause the second stage to cycle. attempt. If the burners still do not light, this sequence is repeat- The second method of adding and subtracting stages causes ed for 15 minutes.

  • Page 30: Thermostat Control

    If the user has selected Adaptive (see Cooling section) for stage of compressor might cycle rapidly, slowed only by its thermostat mode, the algorithm will follow the configurable minimum on- and off-time requirements. delays for adding and removing stages. When adding addition- For size 016 to 024 units, the algorithm must decide how to al heat stages, the delay is measured from when the last stage map a two-stage thermostat to three stages of compression.

  • Page 31: Space Temperature Sensor Calibration

    Consider the following values: Cool Demand = 0.9, change However, circuits with strikes will be given an opportunity in Cool Demand = 0.2, Cool Thermal Lag = 1.0, and Cool to reset their strike counter to zero. As discussed above, a strike Demand Positive Level = 1.0.

  • Page 32: Alarms And Alerts

    Alarms and Alerts — The possible causes are Alarms and alerts are warnings of abnormal or fault conditions, and may cause either one circuit 1. Welded contactor. or the entire unit to shut down. They are assigned code 2. Frozen compressor relay on MBB. numbers and descriptions as described below.
  • Page 33 Alert Codes 110, 111, 140 (Loss of Charge) — Alert codes Belimo Actuator. This is usually caused by a wiring problem. 110, 111, and 140 are for circuits A, B and C, respectively. Investigate using the Low Voltage Schematic. These alerts occur when the compressor is OFF and the suction Alarm Code 404 (Fire Shutdown) —...
  • Page 34 Alert Code 409 (Fan Feedback Off When Not Expected) — wiring. The software will enter either the cooling or heating This alert occurs when the IDF has been on for more than mode depending upon which input turned on first. This alert 15 seconds yet the Fan Feedback is Off.
  • Page 35 → Table 27 — Alarm Codes ALARM OR ACTION TAKEN RESET ALERT DESCRIPTION PROBABLE CAUSE BY CONTROL METHOD NUMBER T051 Compressor A1 Safety Trip Add Strike for Circuit A Automatic High-pressure switch open. Check for T126 Compressor internal pro- tection open. Wiring error Compressor A1 Current Detected After Turnoff Turn off all compressors Automatic...
  • Page 36 → Table 28 — Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and fan will not Power failure. Call power company. start. Fuse blown or circuit breaker tripped. Check CB1, Replace fuse or reset circuit breaker. CB2, and CB3. Disconnect off. Power disconnect.
  • Page 37 Table 29 — Gas Heating Service Analysis PROBLEM CAUSE REMEDY Burners will not ignite. Active alarm. Check active alarms using ComfortLink™ Scrolling Marquee. No power to unit. Check power supply, fuses, wiring, and circuit breakers. No power to IGC (Integrated Gas Control). Check fuses and plugs.
  • Page 38 LEGEND Induced-Draft Motor IDM — Integrated Gas Unit Controller IGC — NOTE: Thermostat Fan Switch in the “AUTO” position. Fig. 13 — IGC Control (Heating and Cooling)

  • Page 39: Thermistor Troubleshooting

    Thermistor Troubleshooting — pressure of circuits A, B, and C. The pressure/voltage charac- The electronic con- teristics of these transducers are in shown in Table 35. The trol uses five 5K-thermistors (T1 through T5) to sense tempera- accuracy of these transducers can be verified by connecting an tures used to control operation of the unit.
  • Page 40 Table 31 — Thermistor Temperature (F) vs Resistance/Voltage Drop Values for OAT, SAT, and SCT Thermistors (5K at 25 C Resistors) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 7,686 0.511 1,190 –25 3.699 98,010...
  • Page 41 Table 32 — Thermistor Temperature (C) vs Resistance/Voltage Drop Values for OAT, SAT, and SCT Thermistors (5K at 25 C Resistors) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 7,855 0.506 1,158 –32 3.705 100,260...
  • Page 42 Table 33 — Thermistor Temperature (°F) vs Resistance/Voltage Drop Values for T55, T56, and T58 Space Temperature Sensors (10K at 25 C Resistors) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) –25 4.758...
  • Page 43 Table 34 — Thermistor Temperatures (°C) vs Resistance/Voltage Drop Values for T55, T56, and T58 Space Temperature Sensors (10K at 25 C Resistors) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) –32 4.762...

  • Page 44: Appendix A - Ccn Tables

    APPENDIX A — CCN TABLES UNIT (General Unit Configurations) DESCRIPTION STATUS DEFAULT UNITS POINT Number of Compressors 1 – 3 2: 12.5, 25 ton NUM_COMP 3: 15, 18, 20 ton Compressor Min On Time 120 – 999 MIN_ON Compressor Min Off Time 300 –...
  • Page 45 APPENDIX A — CCN TABLES (cont) OPTIONS1 (Option Configurations) DESCRIPTION STATUS DEFAULT UNITS POINT Startup Delay (seconds) 0 – 600 STARTDLY Unit Control Type 1 = AutoSelect CTL_TYPE 2 = Thermostat 3 = Space Sensor Thermostat Control Type 0 = Adaptive STATTYPE 1 = 1 Stage Y1 2 = 2 Stage Y1...
  • Page 46 APPENDIX A — CCN TABLES (cont) ECONOCFG (Economizer Configurations) DESCRIPTION STATUS DEFAULT UNITS POINT Economizer Control Board Installed Yes/No ECB_ECON Economizer Min Position 0 – 100 ECONOMIN Econ High Temp Lockout 55 – 75 OATLECLH Econ Low Temp Lockout 0 – 50 OATLECLL Unoccupied Free Cooling Enable/Disable...
  • Page 47 APPENDIX A — CCN TABLES (cont) GENERAL DESCRIPTION STATUS UNITS POINT FORCIBLE UNIT: Currently Occupied Yes/No OCCUPIED Supply Air Temperature snnn.n Outdoor Air Temperature snnn.n Space Temperature snnn.n Space Temperature Offset sn.n SPTO Cooling Demand snn.n COOL_DMD Heating Demand snn.n HEAT_DMD Unit Shutdown Input On/Off...
  • Page 48 APPENDIX A — CCN TABLES (cont) TSTAT (Thermostat) DESCRIPTION STATUS UNITS POINT FORCIBLE Thermostat Y1 Input On/Off Thermostat Y2 Input On/Off Thermostat W1 Input On/Off Thermostat W2 Input On/Off Thermostat G Input On/Off ECONOMZR (Economizer) DESCRIPTION STATUS UNITS POINT FORCIBLE Economizer Power On/Off ECON_PWR...
  • Page 49 APPENDIX A — CCN TABLES (cont) COOLING DESCRIPTION STATUS UNITS POINT FORCIBLE In Cooling Mode? Yes/No IN_COOL Outdoor Air is Cool Yes/No OAT_COOL OK to Use Compressors Yes/No MECHCOOL Available Cooling Stages AVLCSTGS Requested Cooling Stages REQCSTGS Actual Cooling Stages ACTCSTGS Compressor A1 On/Off...
  • Page 50 APPENDIX A — CCN TABLES (cont) ALARMOUT DESCRIPTION STATUS DEFAULT UNITS POINT ALARM OUTPUT ACTIVE FOR: Space Sensor Failure Yes/No SPT_AL SAT Thermistor Failure Yes/No SAT_AL OAT Thermistor Failure Yes/No OAT_AL Current Sensor Failure Yes/No CS_AL Compressor Failure Yes/No COMP_AL Refrig Circuit Failure Yes/No CKT_AL...
  • Page 51 APPENDIX A — CCN TABLES (cont) BRODEFS (Broadcast POC Definition Table) DESCRIPTION STATUS DEFAULT UNITS POINT CCN Time/Date Broadcast Yes/No CCNBC CCN OAT Broadcast Yes/No OATBC Global Schedule Broadcast Yes/No GSBC CCN Broadcast Ackr Yes/No CCNBCACK Daylight Savings Start Start Month 1 to 12 STARTM Start Week...
  • Page 52 APPENDIX A — CCN TABLES (cont) ALARMDEF (Alarm Definition Table) DESCRIPTION STATUS DEFAULT UNITS POINT Alarm Routing Control 00000000 00000000 ALRM_CNT Equipment Priority 0 to 7 EQP_TYPE Comm Failure Retry Time 1 to 240 RETRY_TM Re-alarm Time 1 to 255 RE-ALARM Alarm System Name XXXXXXXX...
  • Page 54 Copyright 2001 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 534-80090 Printed in U.S.A. Form 48/50HG-2T Pg 54 10-01 Replaces: 48/50HG-1T...

  • Page 55: Control Set-Up Checklist

    CONTROL SET-UP CHECKLIST Model Number: ____________________________________ Software Versions: ____________________________________ Serial Number: _____________________________________ MBB: CESR131278-00- __ __ Date: ____________________________________________ SCB/ECB: CESR131249-00- __ __ Technician: ________________________________________ MARQ: CESR131171-01- __ __ INDICATE UNIT SETTINGS BELOW Control Type: Thermostat / T55 Space Temp. / T56 Space Temp. / T58 Space Temp. Set Points: Cooling Occupied:___________...
  • Page 56 Occupancy Schedules Set Holiday Schedules Set Correct Compressor Rotation Verified Installation Checklist Completed Copyright 2001 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book PC 111 Catalog No.

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