Carrier 48PG20 Controls, Start-Up, Operation, Service And Troubleshooting Instructions
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Carrier 48PG20 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

Single package rooftop units with comfortlink controls and puron (r-410a) refrigerant
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Controls, Start-Up, Operation, Service and
Troubleshooting Instructions
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
BASIC CONTROL USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
ComfortLink™ Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Scrolling Marquee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Accessory Navigator™ Display . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
System Pilot™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
CCN Tables and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . . . . . . . .4
START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Compressor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Refrigerant Service Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Crankcase Heater(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Subcooler Heat Exchanger (SHX) . . . . . . . . . . . . . . . . . . . . . . . . . .6
Evaporator Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Condenser Fans and Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Outdoor-Air Inlet Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Gas Heat (48PG Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Orifice Change (48PG Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Air Baffles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Accessory Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
CONTROLS QUICK START . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35,36
Thermostat Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Direct Wired (T-55 or T-56) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Space Humidity Control - Humidistat . . . . . . . . . . . . . . . . . . . .35
Space Humidity Control - Thermidistat™ . . . . . . . . . . . . . . . .35
CCN Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Control Configuration Checklist . . . . . . . . . . . . . . . . . . . . . . . . . .36
Programming Operating Schedules . . . . . . . . . . . . . . . . . . . . . . .36
SERVICE TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-38
THIRD PARTY CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38,39
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Humidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Humidity Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Remote Occupancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Fire Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Outdoor Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
IAQ Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
IAQ Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
OAQ Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
CONTROLS OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-52
Display Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Unit Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Occupancy Determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Indoor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
•
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480028-01
Book 1
1
Tab
1a 1b
with COMFORTLINK™ Controls
and PURON® (R-410A) Refrigerant
CONTENTS
Page
•
SPACE SENSOR CONTROL
•
OUTDOOR FANS
Gas Heating (48PG Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
•
THERMOSTAT CONTROL
•
•
SUPPLY AIR TEMPERATURE (SAT) SENSOR
Electric Heat (50PG Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
•
THERMOSTAT CONTROL
•
SPACE SENSOR CONTROL
•
SUPPLY AIR TEMPERATURE (SAT) SENSOR
Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
•
THERMOSTAT CONTROL
•
SPACE SENSOR CONTROL
•
•
UNOCCUPIED FREE COOLING
•
POWER EXHAUST
•
SETTING UP THE SYSTEM
•
REHEAT MODE SELECTION PROCESS
•
REHEAT MODE DIAGNOSTIC HELP
•
AIR BAFFLES
Indoor Air Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Temperature Compensated Start . . . . . . . . . . . . . . . . . . . . . . . . . 51
Alarm Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52-67
Complete Unit Stoppage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Restart Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Control Module Communication. . . . . . . . . . . . . . . . . . . . . . . . . . 54
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
•
•
Cooling Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Humidi-MiZer Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Economizer Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Heating Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Phase Loss Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Thermistor Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Transducer Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Forcing Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . . . . . . . . . . 67-84
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Economizer Control Board (ECB) . . . . . . . . . . . . . . . . . . . . . . . . 67
Integrated Gas Control (IGC) Board . . . . . . . . . . . . . . . . . . . . . . 67
Low Voltage Terminal Strip (TB2) . . . . . . . . . . . . . . . . . . . . . . . . . 67
Scrolling Marquee Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Accessory Navigator™ Display. . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Carrier Comfort Network® Interface . . . . . . . . . . . . . . . . . . . . . . 80
Subcooler Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Field-Installed Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
•
•
•
•
•
ECONOMIZER
•
POWER EXHAUST
•
TWO-POSITION DAMPER
•
INDOOR AIR QUALITY
•
OUTDOOR AIR QUALITY
•
SMOKE DETECTORS
•
FILTER STATUS
•
FAN STATUS
Printed in U.S.A.
Form 48/50PG-5T
Single Package Rooftop Units
Pg 1
6-06
48/50PG20-28
Page
Replaces: 48/50PG-2T

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Summary of Contents for Carrier 48PG20

  • Page 1: Table Of Contents

    Fire Shutdown ..........38 Carrier Comfort Network® Interface ..... . 80 Alarm Output .

  • Page 2: Safety Considerations

    Untrained The ComfortLink™ control is fully communicating and personnel can perform the basic maintenance functions of cable-ready for connection to the Carrier Comfort Network® replacing filters. Trained service personnel should perform all (CCN) building management system. The control provides other operations.

  • Page 3: Scrolling Marquee

    to the AUTO VIEW display category as shown under the RUN This device is the keypad inter- Scrolling Marquee — face used to access the control information, read sensor values, STATUS category. To show the top-level display, press the and test the unit. The Scrolling Marquee is located in the main ESCAPE key until a blank display is shown.

  • Page 4: System Pilot

    The System Pilot (33PILOT- System Pilot™ Device — shown in parenthesis after the value. As an example, Configu- 01) device is a component of Carrier’s 3V™ system and serves → → ration UNIT T.CTL = 1 (1 Stage Y1).
  • Page 5 Table 2 — Scrolling Marquee Menu Display Structure SERVICE TIME OPERATING TEMPERATURES PRESSURES SETPOINTS INPUTS OUTPUTS CONFIGURATION ALARMS STATUS TEST CLOCK MODES Auto View of Service Test Mode Suction Occupied Cool Thermostat Fan Outputs Display Time of Day Control Reset All Run Status (TEST) Temperatures...

  • Page 6: Start-Up

    various motor pulley settings. To alter fan performance, see START-UP Evaporator Fan Performance Adjustment section on page 87. Use the following information and Start-Up Checklist on Condenser fans and page CL-1 to check out unit PRIOR to start-up. Condenser Fans and Motors — motors are factory set.

  • Page 7: Orifice Change (48Pg Only)

    Purchase these orifices from your option are equipped with Motormaster® control to maintain local Carrier dealer. Follow instructions in accessory Installa- adequate discharge pressure for proper unit operation during tion Instructions to install the correct orifices.
  • Page 8 Table 4 — Fan Performance — 48PGE20 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5000 1.53 1.80 2.06 2.31 2.57 5500 1.90 2.19 2.47 2.74 3.01 6000 2.32 2.63 2.93 3.22 3.50 6500 2.79 3.12 3.44 3.75 4.05...
  • Page 9 Table 5 — Fan Performance — 48PGF20 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5000 1.53 1.80 2.06 2.31 2.57 5500 1.90 2.19 2.47 2.74 3.01 6000 2.32 2.63 2.93 3.22 3.50 6500 2.79 3.12 3.44 3.75 4.05...
  • Page 10 Table 6 — Fan Performance — 48PGD24 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 1.82 2.11 2.40 2.67 2.94 6,000 2.21 2.53 2.84 3.13 3.42 6,500 2.67 3.01 3.33 3.64 3.95 7,000 3.17 3.53 3.88 4.21 4.53...
  • Page 11 Table 7 — Fan Performance — 48PGE24 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 1.90 2.19 2.47 2.74 3.01 6,000 2.32 2.63 2.93 3.22 3.50 6,500 2.79 3.12 3.44 3.75 4.05 7,000 3.33 3.68 4.02 4.34 4.66...
  • Page 12 Table 8 — Fan Performance — 48PGF24 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 1.90 2.19 2.47 2.74 3.01 6,000 2.32 2.63 2.93 3.22 3.50 6,500 2.79 3.12 3.44 3.75 4.05 7,000 3.33 3.68 4.02 4.34 4.66...
  • Page 13 Table 9 — Fan Performance — 48PGD28 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 6,500 2.84 3.18 3.49 3.79 4.12 7,000 3.38 3.77 4.09 4.41 4.74 7,500 3.99 4.42 4.76 5.09 1024 5.43 8,000 4.65 5.13 5.51 1030...
  • Page 14 Table 10 — Fan Performance — 48PGE28 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 6,500 2.99 3.30 3.60 3.91 4.25 7,000 3.58 3.92 4.23 4.55 1000 4.88 7,500 4.24 4.61 4.94 1005 5.26 1043 5.60 8,000 4.98 5.37...
  • Page 15 Table 11 — Fan Performance — 48PGF28 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 6,500 2.99 3.30 3.60 3.91 4.25 7,000 3.58 3.92 4.23 4.55 1000 4.88 7,500 4.24 4.61 4.94 1005 5.26 1043 5.60 8,000 4.98 5.37...
  • Page 16 Table 12 — Fan Performance — 50PG20 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5000 1.27 1.54 1.82 2.10 2.37 5500 1.57 1.86 2.15 2.44 2.73 6000 1.92 2.21 2.52 2.82 3.13 6500 2.31 2.61 2.93 3.25 3.58...
  • Page 17 Table 13 — Fan Performance — 50PG24 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 1.57 1.86 2.15 2.44 2.73 6,000 1.92 2.21 2.52 2.82 3.13 6,500 2.31 2.61 2.93 3.25 3.58 7,000 2.75 3.06 3.39 3.73 4.07...
  • Page 18 Table 14 — Fan Performance — 50PG28 — Vertical Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 6,500 2.74 2.85 3.16 3.45 3.74 7,000 2.88 3.35 3.70 4.01 4.30 7,500 3.15 3.88 4.29 4.63 4.94 8,000 3.62 4.45 4.94 5.30 1006...
  • Page 19 Table 15 — Fan Performance — 48PGD20 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5000 2.65 2.93 3.21 1019 3.17 1066 3.52 5500 3.26 3.56 1036 3.53 1083 3.90 1127 4.28 6000 1013 3.58 1060 3.96...
  • Page 20 Table 16 — Fan Performance — 48PGE20 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5000 2.74 3.04 3.34 1035 3.33 1083 3.69 5500 3.38 1003 3.32 1053 3.70 1100 4.09 1145 4.49 6000 1029 3.74 1077...
  • Page 21 Table 17 — Fan Performance — 48PGF20 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5000 2.74 3.04 3.34 1035 3.33 1083 3.69 5500 3.38 1003 3.32 1053 3.70 1100 4.09 1145 4.49 6000 1029 3.74 1077...
  • Page 22 Table 18 — Fan Performance — 48PGD24 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 3.26 3.56 1036 3.53 1083 3.90 1127 4.28 6,000 1013 3.58 1060 3.96 1105 4.35 1149 4.75 1191 5.16 6,500 1089...
  • Page 23 Table 19 — Fan Performance — 48PGE24 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 3.38 1003 3.32 1053 3.70 1100 4.09 1145 4.49 6,000 1029 3.74 1077 4.15 1123 4.56 1167 4.98 1210 5.41 6,500...
  • Page 24 Table 20 — Fan Performance — 48PGF24 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 3.38 1003 3.32 1053 3.70 1100 4.09 1145 4.49 6,000 1029 3.74 1077 4.15 1123 4.56 1167 4.98 1210 5.41 6,500...
  • Page 25 Table 21 — Fan Performance — 48PGD28 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 6,500 3.06 3.26 3.51 3.80 4.12 7,000 3.69 3.89 4.14 4.42 4.74 7,500 4.40 4.61 4.85 5.13 1026 5.44 8,000 5.20 5.40...
  • Page 26 Table 22 — Fan Performance — 48PGE28 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 6,500 3.14 3.35 3.61 3.90 4.24 7,000 3.79 4.00 4.25 4.54 4.87 7,500 4.52 4.74 4.99 1006 5.27 1042 5.59 8,000 5.33...
  • Page 27 Table 23 — Fan Performance — 48PGF28 — Horizontal Supply and Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 6,500 3.14 3.35 3.61 3.90 4.24 7,000 3.79 4.00 4.25 4.54 4.87 7,500 4.52 4.74 4.99 1006 5.27 1042 5.59 8,000 5.33...
  • Page 28 Table 24 — Fan Performance — 50PG20 — Horizontal Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5000 1.37 1.61 1.84 2.08 2.33 5500 1.71 1.96 2.21 2.45 2.71 6000 2.09 2.35 2.62 2.88 3.14 6500 2.53 2.80 3.08 3.35 3.63...
  • Page 29 Table 25 — Fan Performance — 50PG24 — Horizontal Supply/Return Units AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) 5,500 1.71 1.96 2.21 2.45 2.71 6,000 2.09 2.35 2.62 2.88 3.14 6,500 2.53 2.80 3.08 3.35 3.63 7,000 3.02 3.30 3.59 3.88 4.17...
  • Page 30 Using the fan motors up to the bhp ratings shown will not result in nuisance tripping or prema- ture motor failure. Unit warranty will not be affected. See Tables 29 and Table 27 — Air Quantity Limits (48PG20-28 Units) COOLING HEATING...
  • Page 31 4,500 5,400 6500 12,000 Medium Heat (50 kW) 3,750 4,800 Low Heat (25 kW) 3,750 3,750 Table 29 — Evaporator Fan Motor Specifications — 48PG20-28 Units UNIT DRIVE ORIENTATION NOMINAL HP VOLTAGE MAX WATTS EFFICIENCY % MAX BHP MAX BkW...
  • Page 32 Table 29 — Evaporator Fan Motor Specifications — 48PG20-28 Units (cont) UNIT DRIVE ORIENTATION NOMINAL HP VOLTAGE MAX WATTS EFFICIENCY % MAX BHP MAX BkW MAX AMPS 48PG 4578 87.5 5.37 4.01 15.8 5115 87.5 6.00 4.48 15.4 Vertical 5115 87.5...
  • Page 33 Table 30 — Evaporator Fan Motor Specifications — 50PG20-28 Units (cont) UNIT DRIVE ORIENTATION NOMINAL HP VOLTAGE MAX WATTS EFFICIENCY % MAX BHP MAX BkW MAX AMPS 50PG 3700 85.8 4.26 3.17 10.6 3700 85.8 4.26 3.17 Vertical 3700 85.8 4.26 3.17 5015...
  • Page 34 2. The static pressure must be added to external static pressure. The sum and the evapo- rator entering-air cfm should then be used in conjunction with the Fan Performance table to determine blower rpm, bhp, and watts. Table 33 — Fan RPM At Motor Pulley Settings* — 48PG20-28 Units MOTOR PULLEY TURNS OPEN UNIT...

  • Page 35: Controls Quick Start

    Table 34 — Fan Rpm At Motor Pulley Settings* — 50PG20-28 MOTOR PULLEY TURNS OPEN 50PG DRIVE Low Range Vertical Mid-Low Range Vertical 1013 1035 1056 1078 1099 1120 1142 1163 1185 1206 Mid-High Range Vertical 1000 1019 1039 1059 1078 1098 1117...

  • Page 36: Control Configuration Checklist

    Refer to check- Control Configuration Checklist — SERVICE TEST list CL-1 for recording site specific unit control configurations. The Service Test function can be used to verify proper oper- ation of compressors, heating stages, indoor fan, outdoor fans, Programming Operating Schedules — power exhaust fans, economizer, and alarm relay.
  • Page 37 Table 35 — Setting an Occupied Time Schedule — Weekdays Only for 7:30 to 22:30 DISPLAY SUB-SUB KEYPAD ITEM DISPLAY ITEM EXPANSION COMMENT MENU MODE ENTRY TIMECLOCK Local Occupancy Schedule ENTER SCH.L PER.1 OCC.1 Period Occupied Time ENTER 00.00 Scrolling stops ENTER 00.00 Hours Flash...

  • Page 38: Third Party Control

    Table 36 — Service Test Modes and Submodes Directory DISPLAY MENU/ EXPANDED CCN TABLE/ VALUES UNITS DEFAULT SUB-MENU/NAME NAME SUB-TABLE NAME SERVICE TEST MAINTENANCE DISPLAY TEST Field Service Test Mode On/Off (TEST = display only) INDP Test Independent Outputs TESTINDP ECON Economizer Position Test 0 to 100...

  • Page 39: Iaq Switch

    Operating Modes, system mode is displayed as expandable For units with the economizer option or IAQ Switch — text. accessory and the ECB control board, the IAQ switch input is provided on the field connection terminal board (TB2). The → IAQ Switch Input configuration, Configuration AIR.Q RUN STATUS...

  • Page 40: Occupancy Determination

    Shut Down on IDF Failure (IDF.F) — This configuration unoccupied. If the unit is operating with a space temperature applies only if a fan switch is installed and configured. A YES sensor (T-55, T-56 or T-58), occupancy affects the unit set value will enable diagnostic Alert T409 to shut down the unit points and the operation of the economizer.

  • Page 41: Indoor Fan

    ensure proper time delays and SAT control when the econo- The indoor fan is controlled by the indoor Indoor Fan — → → mizer is cooling. Cooling begins when the Y1 input is ener- fan relay output (Outputs FANS IDF) on the MBB (main gized.

  • Page 42: Gas Heating (48Pg Units)

    Two methods are used to add and remove stages of cooling level 1 when Fan LEV0 Max Pressure limit is reached. Chang- for units with more than one compressor. The first method es between levels 1 to 3 are initially selected based on outdoor causes the unit to operate around its steady-state number of air temperature (OAT) input and the level On and Off tempera- stages.

  • Page 43: Space Sensor Control

    If the indoor fan control is configured to cycle with the heat- is satisfied, the MBB will turn off HT.1 which will turn off gas → → ing demand (Configuration UNIT OC.FN = No) the to the main burners. → fan will stop after a configured delay, Configuration If the user has selected Adaptive (see Cooling section) for →...

  • Page 44: Electric Heat (50Pg Units)

    The control uses two methods to add a stage of heating. The indoor fan will follow the HT.1 output. During continuous fan, first method will add a stage of heating when the the indoor fan will follow the G input. →...

  • Page 45: Economizer Actuator Communications

    → → SPACE SENSOR CONTROL — If the unit is in cooling, Free Cooling (Configuration ECON UEFC), Free Cool- → → operating under space temperature control, the economizer is ing Preoccupancy Time (Configuration ECON FC.TM) → available for cooling, and no compressors are operating, the and Free Cool Low Temp Limit (Configuration →...
  • Page 46 Outdoor fan control for Humidi-MiZer system units Compressor staging control for Humid-MiZer units requires includes a Motormaster® variable-speed control of some or all that circuit A always operate when circuit B is on. This applies outdoor fans, depending on unit model size. The Motormaster to normal operation, service test, and for control alarm respons- control automatically adjusts the outdoor fan speed to maintain es.
  • Page 47 RH2.x RH1.x COND COIL HUMIDI-MIZER COIL COMP OUTDOOR AIR METERING DEVICE EVAP COIL CLOSED VALVE OPEN VALVE 3-WAY VALVE INDOOR ENTERING a48-8224 Fig. 8 — Hot Gas Reheat Mode (Reheat2) — Humidi-MiZer™ System → → Space Humidity Switch (Configuration UNIT RH.SW) multiple circuits in Reheat2 mode.
  • Page 48 REHEAT MODE SELECTION PROCESS — Selection of the reheat mode for each refrigerant circuit is determined from the space humidity (from RH sensor or switch input) and the circuit cooling demand (from space temperature sensor or ther- mostat input). Table 42 shows the corresponding circuit mode and output status for the different demand combinations.

  • Page 49: Indoor Air Quality

    a48-8226 Fig. 10 — Wind Baffle Dimensions remove contaminants and CO generated by sources other than The ComfortLink™ con- Indoor Air Quality (IAQ) — people. The EC.MN should be set to an economizer position trol has the capability for several methods of demand ventila- that brings in enough fresh air to remove contaminants and tion control.
  • Page 50 → → → EC.MN or Configuration AIR.Q OVR.P to provide OUTDOOR AIR QUALITY (Analog Input) — The economizer cooling. ComfortLink control is configured for outdoor air quality sen- sors which provide 4 to 20 mA for 0 to 2000 ppm. If a sensor IA.CF = 3 (Control Minimum Position) —...

  • Page 51: Temperature Compensated Start

    IAQ algorithm has caused It is possible to configure the ComfortLink™ control tion — the indoor fan to operate. The configuration Configuration to participate as an element of the Carrier Comfort Network → → AIR.Q II.FN (IAQ Switch Input Fan CFG) determines...

  • Page 52: Alarm Handling

    → Timed Override Hours (SCH.O OV.EX) — This displays ALARM RELAY OUTPUT — The alarm relay output is a the current number of hours left in an override. It is possible to normally open 24 vac output between field connection terminal cancel an override in progress by writing “0”...
  • Page 53 Table 43 — ComfortLink™ Alarm Codes ALARM OR ACTION TAKEN RESET ALERT DESCRIPTION PROBABLE CAUSE BY CONTROL METHOD NUMBER High-pressure switch open. Compressor internal protection open. Wiring Compressor A1 Safety Trip Add Strike for Circuit A Automatic error T051 Compressor A1 Current Detected After Turnoff Turn off all compressors Automatic Welded contactor...

  • Page 54: Restart Procedure

    YELLOW LED — The MBB has one yellow LED which is compressor stops, and the CS no longer detects current, used to indicate CCN communication activity. The Carrier causing the control to activate this alert. Comfort Network® (CCN) LED will blink during times of 2.
  • Page 55 and there is no current, verify CS wiring and replace if 240 F (–40 to 116 C). This alert will only occur if the unit is necessary. configured for a return air sensor. There is no control action as a result of this alert. This alert resets automatically. The cause 4.
  • Page 56 return air, or stuck open economizer when the ambient tempera- upon its configuration. This alarm is usually caused by an aux- ture is low. iliary device that is trying to shut down the unit, e.g., smoke de- tector. The configuration for this switch input can be found at Alert Code T140 (Loss of Charge) —...

  • Page 57: Cooling Troubleshooting

    Alert Code T412 (W2 without W1) — This alert occurs in corrected and cleared, operation of the compressors and fans Thermostat mode when W2 is energized and W1 is not. Verify may be verified by using the Service Test mode (see page 36 and thermostat and thermostat wiring.
  • Page 58 Table 44 — Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and Fan Will Not Start. Power failure. Call power company. Fuse blown or circuit breaker tripped. Check CB1, CB2, and Replace fuse or reset circuit breaker. CB3. Disconnect off. Power disconnect. Compressor time guard to prevent short cycling.
  • Page 59 Table 45 — Humidi-MiZer™ Service Analysis PROBLEM CAUSE REMEDY General cooling mode problem. See Cooling Service Analysis (Table 44). Subcooling Reheat Mode No dehumidification demand. See No Dehumidification Demand, below. Will Not Activate. Circuit RH1 valve is not open. See RH1 Valve Operation, below. General cooling mode problem.

  • Page 60: Heating Troubleshooting

    Enter Service Test mode and run the Calibrate Close at 0% or Fully Open at 100%. Economizer (E.CAL) procedure. LEGEND CCN — Carrier Comfort Network® — Indoor Air Quality PHASE REVERSAL PROTECTION — If the control sens- Use the unit Scrolling Heating Troubleshooting —...

  • Page 61: Thermistor Troubleshooting

    A red LED is provided to indicate the function of the board. REFRIGERANT TEMPERATURES — Condenser coil tem- See the table below. peratures are measured with 5 kilo-ohm thermistors. These measurements provide an approximate saturated condensing temperature for each circuit (SCT.A, SCT.B). Ensure that ther- LED STATUS FUNCTION mistors are placed at the correct location and are snapped se-...
  • Page 62 Table 48 — IGC Board LED Alarm Codes LED FLASH ACTION TAKEN BY DESCRIPTION RESET METHOD PROBABLE CAUSE CODE CONTROL Normal Operation — — — Hardware Failure No gas heating. — Loss of power to the IGC. Check 5 amp fuse on IGC, power to unit, 24V circuit breaker, transformer, and wir- ing to the IGC.
  • Page 63 LEGEND IDM — Induced-Draft Motor IGC — Integrated Gas Unit Controller NOTE: Thermostat Fan Switch in the “AUTO” position. a48-5656 Fig. 12 — IGC Service Analysis Logic...

  • Page 64: Transducer Troubleshooting

    adjustments to IAQ and OAQ sensor readings. The space temperature may be corrected by entering either a calibration temperature value in SPT.C, or an offset temperature value in SPT.T. The supply-air temperature may be corrected by enter- ing either a calibration temperature value in SAT.C, or an offset temperature value in SAT.T.
  • Page 65 Table 50 — Temperature (°F) vs Resistance/Voltage Drop Values for OAT, SAT, and SPT Thermistors (10K at 25 C Resistors) TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE DROP (V) (Ohms) DROP (V) (Ohms) DROP (V) (Ohms) –25 4.758 196,453 2.994 14,925...
  • Page 66 Table 51 — Temperature (°F) vs. Resistance/Voltage Drop Values for SCT Sensors (5K at 25 C Resistors) VOLTAGE VOLTAGE VOLTAGE TEMP RESISTANCE TEMP RESISTANCE TEMP RESISTANCE DROP DROP DROP (Ohms) (Ohms) (Ohms) 1.982 7,866 0.511 1,190 –25 3.699 98,010 1.956 7,665 0.502 1,165...

  • Page 67: Major System Components

    ‘1’. Do not change this setting. boards and a majority of the field-installed accessories. See Fig. 25 and Table 56. The interface connection for the Carrier The ECB con- Economizer Control Board (ECB) —...
  • Page 68 a48-7627...
  • Page 69 a48-8227...
  • Page 70 a48-7778...
  • Page 71 a50-8101...
  • Page 72 a48-7628 Fig. 18 — Power Schematic — Units without Humidi-MiZer™ System...
  • Page 73 a48-8228 Fig. 19 — Power Schematic — Units with Humidi-MiZer™ System...
  • Page 74 a48-8229...
  • Page 75 a48-8230...
  • Page 76 RED LED - STATUS GREEN LED - YELLOW LED - a48-7075 LEN (LOCAL EQUIPMENT NETWORK) CCN (CARRIER COMFORT NETWORK) INSTANCE JUMPER (SET TO 1) CEPL130346-01 STATUS Fig. 22 — Main Base Board (MBB) Table 53 — MBB Connections CONNECTION DISPLAY NAME...
  • Page 77 a48-7156 Fig. 23 — Economizer Control Board (ECB) Table 54 — ECB Connections CONNECTION DISPLAY NAME POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O PIN NUMBER INPUTS Input power from MBB control box 24 VAC J1, 1-2 RM.OC Remote occupancy switch field installed switch input J4, 2-3...
  • Page 78 RED LED-STATUS a48-7827 Fig. 24 — Integrated Gas Control (IGC) Board Table 55 — IGC Connections CONNECTION TERMINAL LABEL POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O PIN NUMBER INPUTS RT, C Input power from TRAN 1 control box 24 VAC —...
  • Page 79 J12, 3-4 Return air temperature Local Equipment Network (LEN) communication J13, 1-3, 4-5 Carrier Comfort Network (CCN) communication J13, 6-8, 4-5 *Refer to Third Party Control section on page 38 for information on wiring fire shutdown with a Humidi-MiZer™ system.

  • Page 80: Scrolling Marquee Display

    LEN port on either TB2 or the ECB Fig. 26 — Scrolling Marquee board. a39-2239 Carrier Comfort Network® (CCN) Interface — The 48/50PG units can be connected to the CCN if desired. The communication bus wiring is a shielded, 3-conductor 30-650f cable with drain wire and is field supplied and installed.
  • Page 81 ROOFTOP UNIT UNIT BUILDING SUPERVISOR NETWORK ROOFTOP ROOFTOP OPTIONS UNIT UNIT LEGEND — Carrier Comfort Network® — ComfortLink™ Controls HEATING/COOLING UNITS — Digital Air Volume HVAC — Heating, Ventilation, and Air Conditioning REMOTE AUTODIAL — Terminal Control Unit CCN SITE...

  • Page 82: Field-Installed Accessories

    ENBL. A SAT sensor in the supply duct is the preferred con- TWO-POSITION DAMPER — This accessory wires direct- figuration for systems with Carrier VVT® controls. ly into the low voltage circuit for the indoor fan control. No other control configuration is needed.
  • Page 83 SENSOR WIRING RED (SPT) CCN+ RED (+) BLACK (-) WHITE (GND) a48-7157 RED (+) LEGEND CCN — Carrier Comfort Network a33-374 Fig. 33 — T-58 Communicating Space Temperature Sensor Wiring Fig. 31 — T-55 Space Temperature Sensor Wiring (P/N 33ZCT55SPT)
  • Page 84 TB2-T55 TO MAIN BASE BOARD SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4 SPACE TEMPERATURE AVERAGING — 4 T-55 SENSOR APPLICATION TB2-T55 TO MAIN BASE BOARD SENSOR 1 SENSOR 3 SENSOR 2 LEGEND — Terminal Block Factory Wiring Field Wiring SENSOR 4 SENSOR 5 SENSOR 6...

  • Page 85: Service

    Totaline® environmentally sound coil cleaner is essential to Puron® (R-410A) refrigerant systems operate at higher extend the life of coils. This cleaner is available from Carrier pressures than standard R-22 systems. Do not use R-22 Replacement parts division as part number P902-0301 for a...

  • Page 86: Lubrication

    NOTE: Do NOT USE water in excess of 130 F, as the enzy- matic activity will be destroyed. 5. Thoroughly apply Totaline environmentally sound coil cleaner solution to all coil surfaces including finned area, tube sheets and coil headers. 6. Hold garden sprayer nozzle close to finned areas and ap- ply cleaner with a vertical, up-and-down motion.

  • Page 87: Manual Outdoor Air Damper

    2. Cover area in front of the unit service panel with a terry 4. Screw movable flange toward fixed flange to increase cloth shop towel to absorb lubricant spills and prevent speed and away from fixed flange to decrease speed. run-offs.

  • Page 88: Evaporator Fan Belt Tension Adjustment

    Verify that thermistor, Evaporator Fan Belt Tension Adjustment — Verify Sensor Performance — adjust belt tension: transducer, and switch inputs (see Tables 50-52) are reading correctly. These values can be accessed through the Scrolling 1. Turn off unit power. Marquee display in the Temperatures, Pressures, and Inputs 2.

  • Page 89: Refrigerant Charge

    Amount of refrigerant charge is Refrigerant Charge — listed on unit nameplate. Refer to Carrier GTAC II; Module 5; Add Charge if Above the Curve Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. Unit panels must be in place when unit is operating during charging procedure.

  • Page 90: Gas Valve Adjustment (48Pg Only)

    Recovery cylinder service pressure rating must be 400 psig. Puron systems should be charged with liquid refrigerant. Use a commercial-type metering device in the manifold hose. Mani- fold sets should be 750 psig high-side and 200 psig low-side with 520 psig low-side retard. Use hoses with 750 psig service pressure rating.

  • Page 91: Main Burners (48Pg Only)

    9. Remove 2 screws that hold the burner assembly to vesti- bule plate. SEE DETAIL “C” a48-5096 a48-4600 Fig. 47 — Spark Gap Adjustment (48PG Only) Table 58 — Altitude Compensation* — 48PG20-28 NATURAL GAS PROPANE GAS NATURAL GAS ORIFICE SIZE† PROPANE GAS ORIFICE SIZE† ELEVATION...

  • Page 92: Filter Drier

    A complete list of replacement Replacement Parts — main locked out until an alarm reset is initiated via CCN or parts may be obtained from any Carrier distributor upon manually via the Scrolling Marquee display (see Alarms and request. Alerts section on page 54 for more details).

  • Page 93: Appendix A - Local Display And Ccn Tables

    APPENDIX A — LOCAL DISPLAY AND CCN TABLES MODE — RUN STATUS CCN TABLE/ WRITE ITEM EXPANSION RANGE UNITS SUB-TABLE POINT STATUS RUN STATUS STATUS DISPLAY VIEW Auto View of Run Status (VIEW = Display only) HVAC HVAC Mode Status 1=Disabled 2=Fan Only 3=Cool...
  • Page 94 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — RUN STATUS (cont) CCN TABLE/ WRITE ITEM EXPANSION RANGE UNITS SUB-TABLE POINT STATUS RUN STATUS (cont) COOL (cont) CIR.B Refrigerant Circuit B CMP.B Compressors B On/Off COMP_B TG.B Timeguard B TIMGD_B CS.B1 Compressor B1 Feedback...
  • Page 95 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — SERVICE TEST CCN TABLE/ WRITE ITEM EXPANSION RANGE UNITS DEFAULT SUB-TABLE POINT STATUS SERVICE TEST MAINTENANCE DISPLAY TEST Field Service Test Mode On/Off (TEST = display only) Forcible INDP Test Independent Outputs TESTINDP ECON...
  • Page 96 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — SET POINTS DISPLAY MENU/ EXPANDED CCN TABLE/ VALUES UNITS DEFAULT SUB-MENU/NAME NAME SUB-TABLE NAME SETPOINT CONFIGURATION SETPOINTS SET_PNT OCSP Occupied Cool Setpoint 55 to 80 OCSP UCSP Unoccupied Cool Setpoint 75 to 95 UCSP OHSP...
  • Page 97 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — CONFIGURATION ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/SUB-TABLE CCN POINT PAGE NO. CONFIGURATION SERVICE CONFIGURATION DISP Display Configuration DISPLAY METR Metric Display On/Off DISPUNIT LANG Language Selection 0=English LANGUAGE 1=Spanish 2=French 3=Portuguese...
  • Page 98 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/ SUB-TABLE CCN POINT PAGE NO. CONFIGURATION (cont) COOL (cont) CIR.B Circuit B CS.B1 B1 Current Sensing Enable/Disable Enable B1_SENSE B1.FN B Circuit Level 1 Fans 0 to 7 No Humidi-MiZer FIOP...
  • Page 99 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/SUB-TABLE CCN POINT PAGE NO. CONFIGURATION (cont) HMZR Humidimizer Config HMZR CFG 42, 47 REHT Humidimizer Equipped Yes/No No: no Humidi-MiZer FIOP REHEAT 47, 56 Yes: Humidi-MiZer FIOP...
  • Page 100 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE UNITS DEFAULT CCN TABLE/SUB-TABLE CCN POINT PAGE NO. CONFIGURATION (cont) AIR.Q Air Quality Configuration IAQ_CFG IA.CF IAQ Analog Input Config 0=No IAQ 0: no FIOP IAQANCFG 39, 49, 82 1=Demand Ventilation...
  • Page 101 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — TIME CLOCK CCN TABLE/ ITEM EXPANSION RANGE UNITS DEFAULT SUB-TABLE POINT TIME CLOCK CONFIGURATION TIME Time of Day TIME Hour and Minute xx.xx hh.mm (not in CCN table) DATE Current Date MNTH Month of Year...
  • Page 102 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — OPERATING MODES CCN TABLE/ WRITE ITEM EXPANSION RANGE UNITS SUB-TABLE POINT STATUS OPERATING MODES MAINTENANCE DISPLAY Control Modes MODES MODE System Mode text string SYS_MODE HVAC HVAC Mode text string HVACMODE Currently Occupied Yes/No...
  • Page 103 APPENDIX A — LOCAL DISPLAY AND CCN TABLES (cont) MODE — OPERATING MODES (cont) CCN TABLE/ WRITE ITEM EXPANSION RANGE UNITS SUB-TABLE POINT STATUS OPERATING MODES (cont) MAINTENANCE DISPLAY ECON Economizer Diagnostic ECONDIAG EC.EN Economizer Installed Yes/No ECONO Currently Occupied Yes/No OCCUPIED Forcible...

  • Page 104: Appendix B - Control Modes With Humidi-Mizer System And Economizer

    APPENDIX B — CONTROL MODES WITH HUMIDI-MIZER™ SYSTEM AND ECONOMIZER Thermostat input shown for cooling demand (versus tem- Circuit Subcooling mode = REHEAT 1 perature sensor and set point). Humidistat input shown for Circuit HGRH mode = hot gas reheat = REHEAT 2 dehumidification demand (versus relative humidity sensor and Circuit ON mode = normal cooling set point).
  • Page 106 Copyright 2006 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 Catalog No. 04-53480028-01 Printed in U.S.A. Form 48/50PG-5T Pg 106 6-06 Replaces: 48/50PG-2T 1a 1b...
  • Page 107 CONTROL SET POINT AND CONFIGURATION LOG Model Number: ________________________________________ Software Versions: _______________________________________ Serial Number: ________________________________________ MBB: CESR131320-- __ __ Date: ________________________________________ ECB: CESR131249-- __ __ Technician: ________________________________________ MARQ: CESR131171-- __ __ INDICATE UNIT SETTINGS BELOW Control Type: Thermostat / T-55 Space Temp. / T-56 Space Temp. / T-58 Space Temp. Set Points: Cooling Occupied:_____________...

  • Page 108: Configuration Log

    MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE DEFAULT ENTRY CONFIGURATION (cont) COOL (cont) Supply Air Temperature SA.PD SAT Cool Demand (+) Level 0.5 to 10 ^F SA.ND SAT Cool Demand (–) Level –10 to –0.5 ^F –1 SAT.U Minimum SAT Upper Level 35.0 to 65.0 dF SAT.L Minimum SAT Lower Level 35.0 to 65.0 dF...
  • Page 109 MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE DEFAULT ENTRY CONFIGURATION (cont) OFC (cont) 3.OFF Fan Lev3 Off Temperature 0 to 100 F no Humidi-MiZer FIOP: Humidi-MiZer FIOP: 78 (20) 62 (24) 62 (28) HMZR Humidimizer Config REHT Humidimizer Equipped Yes/No No: no Humidi-MiZer FIOP Yes: Humidi-MiZer FIOP...
  • Page 110 MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE DEFAULT ENTRY CONFIGURATION (cont) ECON (cont) FC.TM Free Cool PreOcc Time 1 to 9999 min FC.LO Free Cool Low Temp Limit 0 to 70 dF PE.EN Power Exhaust Installed Yes/No No: no FIOP Yes: FIOP PE.1 PE Stage1 Econo...
  • Page 111 MODE — CONFIGURATION (cont) ITEM EXPANSION RANGE DEFAULT ENTRY CONFIGURATION (cont) TRIM Sensor Calibration SPT.C Space Temp Calibration –30 to 120 dF SPT.T Space Temp Trim –30 to 30 ^F SAT.C Supply Air Temp Calib. –30 to 130 dF SAT.T Supply Air Temp Trim –30 to 30 ^F RAT.C...

  • Page 112: Unit Start-Up Checklist

    VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS ON PAGES 89 AND 90 GENERAL ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS Copyright 2006 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 Catalog No.

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