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Trane Manuals
Heat Pump
WSC120A
Installation operation & maintenance
Trane WSC120A Installation Operation & Maintenance
Packaged heat pump 3 through 10 ton
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Table Of Contents
65
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Warnings, Cautions and Notices
Environmental Concerns
Model Number Description
Overview of Manual
Unit Nameplate
Table of Contents
Model Number Descriptions
General Information
Unit Nameplate
Compressor Nameplate
Unit Description
System Input Devices & Functions
Supply Fan Failure Input
Clogged Filter Switch
Compressor Disable (CPR1/2)
High Pressure Control
Power Exhaust Control
Lead/Lag Control
Programmable Zone Sensor
Remote Zone Sensor
Evaporator Frost Control
High Temperature Sensor (BAYFRST001A)
Smoke Detector Sensor (Optional)
Phase Monitor
Table.
Unit Inspection
Precautionary Measures
First Aid Measures
Pre-Installation
Unit Clearances
Unit Clearances
Typical Unit Weights & Point Loading Data
Corner Weights
Rigging and Center-Of-Gravity Data
2. Net Weight Should be Added to Unit Weight When Ordering Factory
Installed Accessories
Foundation
Horizontal Units
Ductwork
Installation
Roof Curb
Rigging
Factory Installed Economizer
Fork Lift Pockets
General Unit Requirements
Temperature Limit Switch Usage for Electric Heat Units
Horizontal Discharge Conversion WSC036A-WSC060A, WSC036E, WSC048E
Horizontal Discharge Conversion WSC072A - WSC120A, WSC060E
TCO-A Instructions
Downflow View
Return Air Smoke Detector
Electric Heat Requirements
Horizontal View
Low Voltage Wiring (AC & DC) Requirements
Main Electrical Power Requirements
Condensate Drain Configuration
To Convert Drain Condensate through the Base of Unit
Condensate Trap Installation
Field Installed Power Wiring
Filter Installation
Main Unit Power Standard Wiring
Field Installed Control Wiring
Main Unit Power Optional TBUE Wiring
AC Conductors
Control Power Transformer
Controls Using 24 VAC
Controls Using DC Analog Input/Outputs
DC Conductors
Reliatel Conventional Thermostat Field Wiring Diagram
Customer Control Low Voltage Routing
Reliatel Refrigeration Module
Smoke Detector
Smoke Detector Field Wiring Examples
Space Temperature Averaging
Pre-Start
Typical Field Wiring Diagrams for Optional Controls
Temperature Versus Resistance (Temperature Vs. Resistance Is Negative)
General Unit Requirements
Voltage Imbalance
Electrical Phasing (Three Phase Motors)
Compressor Crankcase Heaters
Test Modes
Reliatel Controls
Verifying Proper Air Flow
Reliatel Control
Service Test Guide for Component Operation
Oversized Motor 5
Start-Up
Economizer Start-Up Reliatel Control
Heating Start-Up
Scroll Compressors
Compressor Start-Up
Final System Setup
Fan Belt Adjustment - Belt Drive Units
Unit Mounted Disconnect 5
Belt Tension Gauge
Belt Tension Measurement and Deflection Ranges
Return Air Smoke Detector Maintenance
Filters
Monthly Maintenance
Maintenance
Heating Season
Coil Cleaning
Hail Guard Removal
Slide-Style and Ball-Style Latches
Hail Guard Reinstallation
Final Process
Sample Maintenance Log
System Status Checkout Procedure
Trouble Shooting
System Failure
Cooling Failure
Service Failure
Simultaneous Heat and Cool Failure
Heat Failure
Cool Failure
Resetting Cooling and Heating Lockouts
Test 1 Zone Temperature Thermistor (ZTEMP)
Zone Temperature Sensor (ZTS) Test
Fan Failure Switch
Zone Temperature Sensor (ZTS) Service Indicator
System Mode and Fan Selection
LED Indicator Test
Programmable & Digital Zone Sensor Test
Testing Serial Communication Voltage
Unit Economizer Control (ECA) Troubleshooting Reliatel Control
Unit Operation Without a Zone Sensor
Wiring Diagrams
Limited Warranty
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Model Number Description
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Unit Nameplate
3
Unit Nameplate
4
Unit Description
5
General Information
6
Trouble Shooting
7
Wiring Diagrams
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Installation
Operation
Maintenance
Packaged Heat Pump
3 Through 10 Ton
Model Numbers
WSC036A - WSC120A
WSC036E - WSC060E
Rt-Svx23D-En
February 2009
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Table of Contents
Troubleshooting
Trouble Shooting
52
Unit Economizer Control (ECA) Troubleshooting ReliaTel Control
57
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