Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480037-01 Printed in U.S.A. Form 48/50A-4T Pg 154 8-06 Replaces: 48/50A-3T
Book 1 1
Ta b 1 a 1 b
Copyright 2006 Carrier Corporation
INDEX
Accessory control components 114
Accessory installation 7
Accessory Navigator™ display 4, 116
Airflow control during
fire-smoke modes 63
Alarm output 30
Alarms and alerts 86
Alert limit configuration 69
Auto view of run status 83
Basic control usage 3-6
Building pressure configuration 61
Building pressure control 61
Carrier Comfort Network (CCN) 68
CCN tables and display 5
CCN tables 131-143
Cleaning 118
ComfortLink™ control 3
Complete unit stoppage 74
Compressor run hours display table 84
Compressor starts display table 84
Condenser-fan adjustment 121
Controls 7
Controls operation 4, 32-72
Controls quick start 27-29
Controls set point and configuration
log CL-1 to CL-4
Conventions used in this manual 5
Cool mode selection process 39
Cooling 30
Cooling control 36
Cooling mode diagnostic help 43
Crankcase heaters 7
Dehumidification and reheat 66
Demand controlled ventilation control 31
Demand limit control 31, 45
Dirty filter switch 57
Discrete switch logic configuration 70
Display configuration 71
Economizer 57
Economizer diagnostic help 60
Economizer integration with
mechanical cooling 47
Economizer operation 58
Economizer options 28
Economizer run status 83
Evacuation mode 63
Evaporator fan 7, 120, 121
Exhaust options 28
Factory-installed components 94
Fan status monitoring 57
Fans 30
Filter drier 122
Fire shutdown mode 63
Fire-smoke inputs 63
Four-inch filter replacement 121
Forcing inputs and outputs 83
Gas heat (48A only) 7
Gas valve adjustment (48A only) 122
Generics table 5
Head pressure control 46
Heat mode diagnostic help 49
Heat mode selection process 48
Heating 30
Heating control 47
Hot gas bypass 72
HVAC modes 33
Independent outputs 30
Indoor air quality control 63
Indoor air quality options 28
Internal wiring 7
Local display tables 123-130
Lubrication 120
Main burners 122
Major system components 94-117
Mode trip helper 84
Modes 32
Multi-stage constant volume units with
mechanical thermostat 28
Multi-stage constant volume units
with space sensor 28
Power failure 121
Pressurization mode 63
Programming operating schedules 29
Refrigerant charge 121
Remote control switch input 71
Remote switch 30
Replacement parts 122
Restart procedure 74
Run status menu 83
Safety considerations 2
Scrolling Marquee 3, 112
Sensor trim configuration 69
Service 118-122
Service access 118
Service analysis 74
Service test 29, 30
Service test mode logic 29
Set clock on VFD (if installed) 28
Single circuit stoppage 74
Smoke control modes 63
Smoke purge mode 63
Software version numbers
display table 85
Space temperature offset 72
Staged gas heating control 51
Start up 7-26
Static pressure control 54
Static pressure reset 55
SumZ cooling algorithm 43
Supply air reset 31
Supply fan status monitoring logic 57
System modes 32
System Pilot™ interface 4
Temperature compensated start 67
Temperature compensated start logic 68
Thermistor troubleshooting 74
Thermostat 30
Thermostatic expansion valve (TXV) 122
Third party control 30-32
Time clock configuration 72-74
Transducer troubleshooting 74
Troubleshooting 74-94
Two-stage constant volume units
with mechanical thermostat
27
Two-stage constant volume units
with space sensor 27
Unit Configuration submenu 35
Unit preparation 7
Unit setup 7
Unit staging tables 42, 43
Unit start-up checklist CL-5
Unoccupied economizer free cooling 59
Variable air volume units using return
air sensor or space temperature sensor 27
VFD control 31
VFD information 152, 153
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