CONTENTS
Two-StageConstant Volume Units with
Multi-StageConstant Volume Units with
SAFETY CONSIDERATIONS
CONTENTS cont
APPENDIX A — LOCAL DISPLAY TABLES . . . .
APPENDIX D - MODE SELECTION
GENERAL
BASIC CONTROL USAGE
Table 1 — A Series Product Line
Fig. 1 — Scrolling Marquee
Fig. 2 — Accessory Navigator Display
Fig. 3 — System Pilot User Interface
ComfortLink Display Modes
START-UP
AIRFLOW
Table 6 — Fan Performance — 48AJ,AK036 Units
Table 8 — Fan Performance — 48AJ,AK041 Units
Table 10 — Fan Performance — 48AJ,AK051 Units
AIRFLOW
AIRFLOW
Table 15 — Fan Performance — 50AJ,AK036 Units
Table 17 — Fan Performance — 50AJ,AK041 Units
Table 19 — Fan Performance — 50AJ,AK051 Units
AIRFLOW CFM 4,000 5,000 6,000 7,000 7,500 8,000
Table 24 — Fan Performance — 48AW,AY036 Units
Table 26 - Fan Performance - 48AW,AY041 Units
Table 28 — Fan Performance — 48AW,AY051 Units
4.81
0.62
Table 33 — Fan Performance — 50AW,AY036 Units
Table 35 — Fan Performance — 50AW,AY041 Units
Table 37 - Fan Performance - 50AW,AY051 Units
Table 39 — Motor Limitations
CONTROLS QUICK START
figure the unit, perform the following
Indoor Air Quality IAQ Options
SERVICE TEST
Fans in Service Test Mode — Upon entering the
Demand Controlled Ventilation Control —
THIRD PARTY CONTROL
CONTROLS OPERATION
SYSTEM MODES Operating Modes→SYS.M
Table 42 — Operating Modes Display Table
Fire
Fig. 4 — Mode Selection
System
Smoke
C.TYP = 1 VAV-RATand C.TYP = 2 VAV-SPT
•MAT.S =
Table 43 — Unit Configuration
•MAT.S =
MAT.S =
under Configuration→UNIT
Table 46 — Supply Air Reset Configuration
Table 44 - Machine Dependent Configurations
→SA.S.R
Table 45 — Setpoints
Table 47 — Cooling Configuration
Protection Label
Fig. 5 — Advanced Scroll Temperature
Fig. 6 — Recommended Minimum Cool-Down
Time After Compressor is Stopped
Fig. 8 — Cool Mode Evaluation
•Lo Cool Mode mechanical stages =
Table 50 — 2-StageSequence — 48/50AJ,AW030-060
Table 49 — 2-StageSequence — 48/50AJ,AW020-027
Table 56 — 2-StageSequence — 48/50A2,A4030-060
Table 55 — 2-StageSequence — 48/50A2,A4020-027
STAGE
Z.PLU = Configuration→COOL→Z.GN * 10 +
Z.MIN = Configuration→COOL→Z.GN * –10+
Table 61 - Run Status Mode Trip Helper
R.PCT = MAT – EDT/ C.CAP
Table 62 — Run Status Cool Display
•MAT.S =
Inputs→GEN.I→DL.S1 Inputs→GEN.I→DL.S2
•MAT.S =
•MAT.S =
•Configuration→COOL→M.M. – Motor Master Control?
Table 63 - Demand Limit Configuration
EC.C.P = Setpoints→SA.LO + Inputs→RSET→SA.S.R
Table 64 — Condenser Fan Staging
Table 65 — Heating Configuration
Table 66 — Heat/Cool Set Point Offsets
Fig. 9 — Heating Offsets
Table 67 — Mode Trip Helper Table
Error = HT.C.P – LAT
Table 69A — Staged Gas Heat — 48AJ,AK,AW,AY Units
Table 68 — Staged Gas Configuration
Table 69B — Staged Gas Heat — 48A2,A3,A4,A5 Units
Table 74 — IGC LED Indicators
•For all other cases, the trip point is T.V.UN
Table 75 — Static Pressure Control Configuration
Fan Status Monitoring
Table 76 — Static Pressure Reset Related Points
Table 77 - Fan Status Monitoring Configuration
Table 78 - Dirty Filter Switch Points
Inputs→GEN.I→E.SW
Fig. 10 — Psychrometric Chart for
E.SEL =
Enthalpy Control
Fig. 11 — Custom Changeover Curve Example
Table 79 — Economizer Configuration Table
C.TYP =
C.TYP =
C.TYP =
C.TYP =
Table 80 — Economizer Run Status Table
Table 82 — Power Exhaust Staging BP.CF =
Table 81 — Building Pressure Configuration
Table 83 — Power Exhaust Staging BP.CF =
RELEVANT ITEMS
Point Configuration→IAQ→AQ.SP→D.F.OF. The con
Point Configuration→IAQ→AQ.SP→D.F.ON. The fan
Fig. 12 — IAQ Control
Fig. 13 — IAQ Response Curve
IAQ Purge Configuration → IAQ → IAQ.P → IQ.PG—
Table 85 — Dehumidification Configuration
Table 84 - Indoor Air Quality Configuration
Carrier Comfort Network CCN System - It
Temperature Compensated Start — This logic is
Table 86 — CCN Configuration
Table 88 - Sensor Trim Configuration
Table 87 — Alert Limit Configuration
Discrete Switch Logic Configuration — The SW.LG
TIME CLOCK CONFIGURATION
Table 92 — Remote Switch Logic Configuration
TROUBLESHOOTING
Table 94 — Cooling Service Analysis
Table 94 — Cooling Service Analysis cont
Table 96 — Electric Heat Service Analysis
Table 95 — Gas Heating Service Analysis
A48-5656
Fig. 14 — IGC Service Analysis Logic
TEMP
TEMP
TEMP
48/50AJ,AK,AW,AY Units Only
48/50AJ,AK,AW,AY Units Only
PRESSURE
48/50A2,A3,A4,A5 Units Only
48/50A2,A3,A4,A5 Units Only cont
R.PCT = MAT - EDT/C.CAP
Y.MIN = -SUB.R*0.4375
Y.PLU = –ADD.R*0.4375
Table 106 - Economizer Run Status Display Table
Table 105 — Auto View of Run Status Display Table
Z.MIN = Configuration→COOL→Z.GN * –10+
Z.PLU = Configuration→COOL→Z.GN * 10 +
Table 108 — Mode Trip Helper Display Table
Table 107 — Cooling Information Display Table
Table 109 — CCN/Linkage Display Table
Table 110 — Compressor Run Hours Display Table
Table 112 — Time Guard Display Table
Table 114 — Alert and Alarm Codes
Table 114 — Alert and Alarm Codes cont
A051 Circuit A, Compressor 1 Stuck On Failure
T092 Circuit A Suction Pressure Transducer Failure
Demand Limit Select Configuration→DMD.L→DM.L.S
T303 Supply Temperature Above Limit— If the supply
at Configuration→UNIT→SENS→FLT.S
MAJOR SYSTEM COMPONENTS
Factory-InstalledComponents
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RED JUMPER WIRE MUST BE ADDED
TO NEXT PAGE
a48-8355
a48-8355
a48-8355
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A48-7294
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A48-7296
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A48-8358
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a48-8360
FROM PREVIOUS PAGE
Page
a48-8361
SW1 SW2 OR DEHUMIDIFY SWITCH
a48-8362
A48-7302
LEGEND
LEGEND AND NOTES FOR FIG.
A48-7811
Fig. 26 — Main Base Board MBB
POINT
A48-7707
Fig. 28 — Staged Gas Heat Control Board SCB
CEPL130351
Fig. 29 — Controls Expansion Board CEM
CEBD430351
TEST
Table 119 — Controls Expansion Board CEM Inputs
Table 120 — IGC Board Inputs and Outputs
Fig. 30 — Scrolling Marquee
Table 121 — VFD Terminal Designations
Fig. 31 — VFD Wiring
TB5 TB6
W2 G
Table 122 — Field Connection Terminal Strips
Fig. 34 — Accessory Navigator Display
Fig. 35 — CCN System Architecture
Fig. 37 - Spark Gap Adjustment
SERVICE
Fig. 36 — Door Latch
Fig. 38 — Typical Gas Heating Section
Fig. 39 — Gas Heat Section Details
Lubrication
Fig. 40 — Evaporator-FanAlignment and Adjustment
Belt Tension Adjustment — To adjust belt tension
Evaporator Fan Service and Replacement
Evaporator-FanMotor Replacement
Fig. 42 — Belt Tension Adjustment
Gas Valve Adjustment
Condenser-FanAdjustment
Fig. 43 — Condenser-FanAdjustment
Table 123 - Round Tube, Plate Fin Unit Charge
a48-8401
a48-8402
25 and 27 Ton MCHX CIRCUIT A Charging Chart
25 and 27 Ton MCHX CIRCUIT B Charging Chart
30 Ton MCHX CIRCUIT B Charging Chart
30 Ton MCHX CIRCUIT A Charging Chart
35 Ton MCHX CIRCUIT B Charging Chart
35 Ton MCHX CIRCUIT A Charging Chart
50 Ton MCHX Charging Chart
40 Ton MCHX Charging Chart
60 Ton MCHX CIRCUIT B Charging Chart
60 Ton MCHX CIRCUIT A Charging Chart
Fig. 52 — Main Burner Removal
Fig. 51 — Gas Valve Part Number EF33CW271
MODE — RUN STATUS
APPENDIX A — LOCAL DISPLAY TABLES
MODE — SERVICE TEST
APPENDIX A - LOCAL DISPLAY TABLES cont
MODE — TEMPERATURES
MODE — RUN STATUS cont
MODE — PRESSURES
APPENDIX A — LOCAL DISPLAY TABLES cont
MODE — SET POINTS
MODE — INPUTS
APPENDIX A — LOCAL DISPLAY TABLES cont
MODE — CONFIGURATION
MODE — INPUTS cont
MODE — OUTPUTS
DEFAULT
MODE - CONFIGURATION cont
APPENDIX A — LOCAL DISPLAY TABLES cont
ITEM
→BP.CF
APPENDIX A — LOCAL DISPLAY TABLES cont
→CCNA
APPENDIX A — LOCAL DISPLAY TABLES cont
APPENDIX A — LOCAL DISPLAY TABLES cont
MODE — ALARMS
MODE — TIME CLOCK
MODE - OPERATING MODES
STATUS DISPLAY TABLES
APPENDIX B — CCN TABLES
STATUS DISPLAY TABLES cont
APPENDIX B - CCN TABLES cont
APPENDIX B — CCN TABLES cont
STATUS DISPLAY TABLES cont
TABLE
CONFIG TABLES
SET POINT TABLE
APPENDIX B — CCN TABLES cont
CONFIG TABLES cont
SERVICE-CONFIGTABLES
APPENDIX B — CCN TABLES cont
APPENDIX B — CCN TABLES cont
SERVICE-CONFIGTABLES cont
SERVICE-CONFIGTABLES cont
APPENDIX B — CCN TABLES cont
TABLE
DEFAULT
SERVICE-CONFIGTABLES cont
APPENDIX B — CCN TABLES cont
TABLE
APPENDIX B — CCN TABLES cont
MAINTENANCE DISPLAY TABLES
APPENDIX B — CCN TABLES cont
MAINTENANCE DISPLAY TABLES cont
DISPLAY NAME
RANGE
MAINTENANCE DISPLAY TABLES cont
APPENDIX B — CCN TABLES cont
TABLE
MAINTENANCE DISPLAY TABLES cont
APPENDIX B — CCN TABLES cont
TABLE
TIME SCHEDULE CONFIG TABLE
MAINTENANCE DISPLAY TABLES cont
APPENDIX B - CCN TABLES cont
Fig. A — VFD Wiring
APPENDIX C - VFD INFORMATION
Table A — VFD Terminal Designations
Table B — VFD Configurations
APPENDIX C — VFD INFORMATION cont
Fig. B — VFD Keypad
APPENDIX C — VFD INFORMATION cont
Fig. C — Standard Display Example
APPENDIX C — VFD INFORMATION cont
To set the clock, perform the following procedure
the status LED on the control panel
APPENDIX C — VFD INFORMATION cont
APPENDIX C - VFD INFORMATION cont
Table C — Fault Codes
Table E — Maintenance Intervals
Table D — Alarm Codes
Check the heat sink as follows when necessary
1.Remove power from drive
Fig. E — Main Fan Replacement
Fig. D - Main Fan Replacement Frame Sizes R1-R4
Frame Sizes R5 and R6
APPENDIX C — VFD INFORMATION cont
Fig. F - Internal Enclosure Fan Replacement
APPENDIX C — VFD INFORMATION cont
A48-7716
APPENDIX D — MODE SELECTION PROCESS
Configuration→SP→SP.CF = 1,2 and the static
Fig. A — Address Rotary Switches
APPENDIX E — UPC OPEN CONTROLLER
Fig. B — UPC Open Controller
Table A — SW3 Protocol Switch Settings for MS/TP
Configuring the BAS Port for BACnet MS
Fig. C — DIP Switches
Fig. D — Network Wiring
Fig. E — BT485 Terminator Installation
Table C — MS/TP Wiring Recommendations
APPENDIX E — UPC OPEN CONTROLLER cont
APPENDIX E — UPC OPEN CONTROLLER cont
Fig. F — BACview6 Device Connection
Configuring the UPC Open Controllers Prop
Table E — LED Status Indicators
APPENDIX E — UPC OPEN CONTROLLER cont
APPENDIX E — UPC OPEN CONTROLLER cont
NETWORK POINTS LIST
APPENDIX E — UPC OPEN CONTROLLER cont
NETWORK POINTS LIST cont
APPENDIX E — UPC OPEN CONTROLLER cont
NETWORK POINTS LIST cont
Return Air Relative Humidity
APPENDIX E — UPC OPEN CONTROLLER cont
NETWORK POINTS LIST cont
BACNET
APPENDIX E — UPC OPEN CONTROLLER cont
NETWORK POINTS LIST cont
BACNET
Local Machine Disable
APPENDIX E — UPC OPEN CONTROLLER cont
NETWORK POINTS LIST cont
APPENDIX E — UPC OPEN CONTROLLER cont
NETWORK POINTS LIST cont
BACNET
Internal wiring
INDEX
Multi-stageconstant volume units with
Multi-stageconstant volume units
Catalog No.
Copyright 2010 Carrier Corporation
Printed in U.S.A
Form 48/50A-9T
DEFAULT
CONTROLS SET POINT AND CONFIGURATION LOG
ITEM
EXPANSION
CL-2
CL-3
CL-4
CL-5
DEFAULT
ITEM
EXPANSION
PRE-START-UP
UNIT START-UPCHECKLIST
TEMPERATURES
START-UP
