Manuals
/
Carrier
/
Household Appliance
/
Heating System
Carrier
48PG20-28 specifications Base Unit Dimensions
Models:
48PG20-28
1
5
64
64
Download
64 pages
4.71 Kb
1
2
3
4
5
6
7
8
<
>
Troubleshooting
Specifications
Poor Flame Characteristics
Install
Charging Chart - 48PG20
Dimension
Field Power Wiring Connections
IGC Board LED Alarm Codes
Evaporator-FanMotor Adjustment
Fan Rpm at Motor Pulley Settings
Page 5
Image 5
5
Fig. 4 — Base Unit Dimensions
Page 4
Page 6
Page 5
Image 5
Page 4
Page 6
Contents
SAFETY CONSIDERATIONS
Installation, Start-Upand Service Instructions
CONTENTS
INSTALLATION Step 1 - Provide Unit Support
Fig. 1 - Roof Curb Details
SHIPPING RAILS
Fig. 2 - Shipping Rail Removal
Fig. 3 - Rigging Details
Fig. 4 - Base Unit Dimensions
Table 1 - Physical Data
48PG
1750
Fig. 5 - Alignment Hole Details
Step 5 - Make Unit Duct Connections
Fig. 6 - Alignment Hole Location
Fig. 8 - Air Distribution - Concentric Duct
Fig. 11 - Combustion Fan Housing Location
Step 6 - Install Flue Hood and Inlet Hood
Fig. 9 - Concentric Duct Details
Fig. 10 - Flue and Inlet Hood Locations
Fig. 12 - Condensate Drain Details
Step 9 - Make Electrical Connections
Fig. 13 - Condensate Drain Piping Details
Fig. 14 - Field Gas Piping
Fig. 16 - Field Control Thermostat Wiring
Fig. 15 - Field Power Wiring Connections
Fig. 17 - Outdoor-AirHood Component
Shipping Location
COMPRESSOR
10.6
Fig. 18 - Outdoor-AirHood Details
LEGEND AND NOTES FOR TABLES 4A AND 4B
Fig. 20 - Manual Damper Details
Fig. 19 - Outdoor-AirHood Assembled
Fig. 22 - Bracket and Hood Positioning
START-UP
PRE-START-UP
3.Connect pressure gage to manifold pressure tap
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
Page
AIRFLOW
AIRFLOW
Page
AIRFLOW
AIRFLOW
Page
AIRFLOW
Page
Page
AIRFLOW
AIRFLOW
GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES
Table 24 - Operation Air Quantity Limits
Table 25 - Evaporator Fan Motor Specifications
HD60FK651
Table 27 - Fan Rpm at Motor Pulley Settings
Table 28 - EconoMi$er IV Sensor Usage
Fig. 25 - Temperature Changeover Set Points
Fig. 24 - Sensor Locations OAT and MAT
Fig. 26 - EconoMi$er IV Wiring
Fig. 27 - Enthalpy Changeover Set Points
APPROXIMATE DRY BULB TEMPERATURE- F C
and LED Locations
13B C
TO x OA + TR x RA = TM
Operating Sequence
Table 29 - CO2 Sensor Standard Settings
Fig. 30 - Subcooler Operation
What to do if you smell gas
SERVICE
Fig. 32 - Removing Heat Exchanger Ceramic
Lubrication
Fig. 31 - Typical Gas Heating Section
Baffles and Clips
Fig. 34 - Evaporator-FanAlignment and Adjustment
Fig. 33 - Evaporator-FanMotor Adjustment
Table 30 - Belt Tension Adjustment
Condenser-FanAdjustment Fig
Fig. 35 - Condenser-FanAdjustment
Table 31 - Sensor Temperature/Resistance Values
Fig. 37 - Charging Chart - 48PG20
Gas Valve Adjustment
Fig. 38 - Charging Chart - 48PG24
Fig. 39 - Charging Chart - 48PG28
Fig. 40 - Gas Valve
Fig. 41 - Spark Gap Adjustment
Table 32 - Altitude Compensation
Protective Devices
Fig. 42 - Typical Low Voltage Control Schematic
Fig. 43 - Typical Power Schematic
Page
LEGEND FOR FIG
Fig. 45 - Typical Component Arrangement - 48PG28
LEGEND TXV - Thermostatic Expansion Valve
TROUBLESHOOTING
Table 33 - Cooling Service Analysis
PROBLEM
Table 34 - Gas Heating Service Analysis
Poor Flame Characteristics
CAUSE
IGC - Integrated Gas Unit Controller
Fig. 46 - IGC Control Heating and Cooling
LEGEND IDM - Induced-DraftMotor
Table 35 - IGC Board LED Alarm Codes
EconoMi$er IV Troubleshooting
MIXED-AIRINPUT - To check mixed-airinput
Copyright 2005 Carrier Corporation
Page
TEMPERATURES
UNIT START-UPCHECKLIST
I. PRE-START-UP
II.START-UP