Manuals
/
Carrier
/
Household Appliance
/
Heating System
Carrier
48PG20-28 specifications Typical Power Schematic
Models:
48PG20-28
1
54
64
64
Download
64 pages
4.71 Kb
51
52
53
54
55
56
57
58
<
>
Troubleshooting
Poor Flame Characteristics
Dimension
EconoMi$er IV Wiring
Condenser-FanAdjustment Fig
Checklist
Service
Page 54
Image 54
Fig. 43 — Typical Power Schematic
54
Page 53
Page 55
Page 54
Image 54
Page 53
Page 55
Contents
Installation, Start-Upand Service Instructions
CONTENTS
SAFETY CONSIDERATIONS
INSTALLATION Step 1 - Provide Unit Support
Fig. 1 - Roof Curb Details
Fig. 2 - Shipping Rail Removal
Fig. 3 - Rigging Details
SHIPPING RAILS
Fig. 4 - Base Unit Dimensions
Table 1 - Physical Data
48PG
1750
Fig. 6 - Alignment Hole Location
Step 5 - Make Unit Duct Connections
Fig. 5 - Alignment Hole Details
Fig. 8 - Air Distribution - Concentric Duct
Fig. 9 - Concentric Duct Details
Step 6 - Install Flue Hood and Inlet Hood
Fig. 11 - Combustion Fan Housing Location
Fig. 10 - Flue and Inlet Hood Locations
Fig. 13 - Condensate Drain Piping Details
Step 9 - Make Electrical Connections
Fig. 12 - Condensate Drain Details
Fig. 14 - Field Gas Piping
Fig. 17 - Outdoor-AirHood Component
Fig. 15 - Field Power Wiring Connections
Fig. 16 - Field Control Thermostat Wiring
Shipping Location
COMPRESSOR
10.6
LEGEND AND NOTES FOR TABLES 4A AND 4B
Fig. 18 - Outdoor-AirHood Details
Fig. 19 - Outdoor-AirHood Assembled
Fig. 20 - Manual Damper Details
Fig. 22 - Bracket and Hood Positioning
PRE-START-UP
START-UP
3.Connect pressure gage to manifold pressure tap
AIRFLOW
AIRFLOW
AIRFLOW
AIRFLOW
Page
AIRFLOW
AIRFLOW
Page
AIRFLOW
AIRFLOW
Page
AIRFLOW
Page
Page
AIRFLOW
AIRFLOW
GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES
Table 25 - Evaporator Fan Motor Specifications
Table 24 - Operation Air Quantity Limits
HD60FK651
Table 27 - Fan Rpm at Motor Pulley Settings
Fig. 24 - Sensor Locations OAT and MAT
Fig. 25 - Temperature Changeover Set Points
Table 28 - EconoMi$er IV Sensor Usage
Fig. 26 - EconoMi$er IV Wiring
13B C
Fig. 27 - Enthalpy Changeover Set Points
and LED Locations
D C B A
TO x OA + TR x RA = TM
Table 29 - CO2 Sensor Standard Settings
Operating Sequence
Fig. 30 - Subcooler Operation
SERVICE
What to do if you smell gas
Fig. 31 - Typical Gas Heating Section
Lubrication
Fig. 32 - Removing Heat Exchanger Ceramic
Baffles and Clips
Fig. 33 - Evaporator-FanMotor Adjustment
Fig. 34 - Evaporator-FanAlignment and Adjustment
Fig. 35 - Condenser-FanAdjustment
Condenser-FanAdjustment Fig
Table 30 - Belt Tension Adjustment
Table 31 - Sensor Temperature/Resistance Values
Fig. 38 - Charging Chart - 48PG24
Gas Valve Adjustment
Fig. 37 - Charging Chart - 48PG20
Fig. 39 - Charging Chart - 48PG28
Fig. 41 - Spark Gap Adjustment
Fig. 40 - Gas Valve
Protective Devices
Table 32 - Altitude Compensation
Fig. 42 - Typical Low Voltage Control Schematic
Fig. 43 - Typical Power Schematic
Page
Fig. 45 - Typical Component Arrangement - 48PG28
LEGEND FOR FIG
TROUBLESHOOTING
Table 33 - Cooling Service Analysis
LEGEND TXV - Thermostatic Expansion Valve
Poor Flame Characteristics
Table 34 - Gas Heating Service Analysis
PROBLEM
CAUSE
Fig. 46 - IGC Control Heating and Cooling
LEGEND IDM - Induced-DraftMotor
IGC - Integrated Gas Unit Controller
EconoMi$er IV Troubleshooting
Table 35 - IGC Board LED Alarm Codes
MIXED-AIRINPUT - To check mixed-airinput
Copyright 2005 Carrier Corporation
Page
II.START-UP
UNIT START-UPCHECKLIST
I. PRE-START-UP
ELECTRICAL