Carrier
48EZ(N)-A
installation instructions
48EZ-A42-60 Unit Dimensions
Troubleshooting
Install
Unit Heating Rise Motor Wire
Dimension
Maintenance
Symptom Cause Remedy
Adjust Gas Input
Temperatures
Limit Switch
Page 4
48EZ
--
A
A09451
Fig. 3 -
48EZ-A42-60
Unit Dimensions
4
Page 3
Page 5
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Page 5
Contents
Table of Contents
Safety Considerations
Receiving and Installation
Introduction
Check Equipment
Provide Unit Support
48EZ-A24-36 Unit Dimensions
48EZ-A42-60 Unit Dimensions
Roof Curb Dimensions
Number
Field Fabricate Ductwork
Provide Clearances
Rig and Place Unit
Inspection
Install Flue Hood
Install Gas Piping
Connect Condensate Drain
Rigging/Lifting of Unit See Fig
Fire or Explosion Hazard
Sediment Trap
Install Duct Connections
Configuring Units for Downflow Vertical Discharge
Physical Data Unit 48EZ-A
Maximum Gas Flow Capacity
Physical Data Unit 48EZ-A Cont’d
Heating Inputs
Install Electrical Connections
Special Procedures for 208-V Operation
High-Voltage Connections
Unit Component Damage Hazard
Balance Point Setting-Thermidistat or Hybrid Thermostat
PRE-START-UP
Control Voltage Connections
Transformer Protection
Start-up Heating and Make Adjust- ments
START-UP
Check for Refrigerant Leaks
Unit Sequence of Operation
Check Gas Input
Adjust Gas Input
Unit Damage Hazard
Start-up Cooling and Make Adjust- ments
Checking and Adjusting Refrigerant Charge
Indoor Airflow and Airflow Adjustments
Gas Heating Fan Speed Set-up
Unit Operation Hazard
Continuous Fan Operation
Two Cooling Fan Speeds Set-up Dehumidification feature used
Color Coding for Indoor Fan Motor Leads
Unit Heating Rise Motor
Dry Coil Air Delivery* Horizontal Unit 48EZ-A24-60
Range Speed Color
Dry Coil Air Delivery* Horizontal Discharge Unit 48EZ-A24-60
1354 1290 1226 1158 1102 1046 981 918 843 55oF Heating Rise
Medium1
48EZ ---,NA48090
48EZ ---,NA48130
Unit Heating Rise Motor Wire
Horizontal and Downflow Filter Pressure Drop Table IN. W.C
Unit Standard CFM Scfm Size
Downflow Cooling Standard CFM Scfm Economizer + Tons
Cooling Standard CFM Scfm
48EZ a
208/230-1-60 Ladder Wiring Diagram, Unit 48EZ-A
208/230-3-60 Connection Wiring Diagram, Unit 48EZ-A
Cont. 208/230-3-60 Ladder Wiring Diagram, Unit 48EZ-A
Cooling Charging Table-Subcooling
Maintenance
Cleaning the Blower Motor and Wheel
Air Filter
Indoor Blower and Motor
Limit Switch
Induced Draft combustion air Blower Assembly
Burner Ignition
Main Burners
Outdoor Fan
Electrical Controls and Wiring
Refrigerant Circuit
Pressure Switches
Loss of Charge Switch
Gas Input
Indoor Airflow
Copeland Scroll Compressor Puron Refrigerant
High-Pressure Switch
Explosion Hazard
Refrigerant System
Unit Operation and Safety Hazard
Compressor Oil
START-UP Checklist
Troubleshooting
Puronr R-410A Quick Reference Guide
Troubleshooting Guide Cooling or Heat Pump Heating Mode
Symptom Cause Remedy
Troubleshooting Guide-LED Error Codes
Troubleshooting Guide-Heating
LED OFF
Temperatures
Remove and Store in Job Files
Preliminary Information Model no
III. START-UP Electrical Supply Voltage Compressor Amps
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