December
Model Number
Installation Operation Maintenance
Packaged Heat Pump
Warnings and Cautions
Model Number Description
Contains Refrigerant
Hazardous Voltage w/Capacitors
Equipment Damage From Ultraviolet UV Lights
WC-IOM-7 Packaged Heat Pump
Contents
Contents
Contents
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 WCZ, WCY, WCX, WCC, WCD, WCH, WCM, WCP and WSC Parts Only. . . . 57 Models Less Than 20 Tons for Commercial Use*. . . . . . . . . . . . . . . . . . . . . . 57 Heat Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Standard Equipment Warranty Terms and Conditions. . . . . . . . . . . . . . . . . . 58 Commercial Equipment Warranty and Liability . . . . . . . . . . . . . . . . . . . . . . . 58 Models Larger that 20 Tons for Commercial Use*
Service digit
Model Number Description
Digit
Minor design sequence
General Information
Unit Nameplate
Compressor Nameplate
Unit Description
Clogged Filter Switch Optional
System Input Devices & Functions
General Information
RTOM - ReliaTel Options Module Optional
Compressor Disable CPR1/2
Power Exhaust Control Optional
Low Pressure Control
High Pressure Control Optional
Lead/Lag Control Dual Circuit Only
Zone Sensor Module ZSM BAYSENS007B
Zone Sensor Module ZSM BAYSENS009B
Zone Sensor BAYSENS011B
High Temperature Sensor BAYFRST001A
Remote Zone Sensor BAYSENS013C
Remote Zone Sensor BAYSENS014C
Remote Zone Sensor BAYSENS016A
General Information
Unit Inspection
Smoke Detector Sensor Optional
Precautionary Measures
Fiberglass Wool
First Aid Measures
Storage
Unit Clearances
General Information
Unit Dimensions
WC-IOM-7 Packaged Heat Pump
Unit Dimensions
Packaged Heat Pump WC-IOM-7
Figure 4. Unit Dimensional Data 20 Ton
Figure 5. Roofcurb Dimensional Data 20 Ton
Unit Dimensions
WC-IOM-7 Packaged Heat Pump
Packaged Heat Pump WC-IOM-7
Figure 7. Horizontal Duct Dimensional Data 20 Ton
Unit Dimensions
Typical weights and point loading data
Heavy Objects
Improper Unit Lift
Figure 8. Rigging and center of gravity data
Rigging
Unit Dimensions
Installation
If a Curb Accessory Kit is not used
Foundation
General Unit Requirements
Installation
Factory Installed Economizer
Main Electrical Power Requirements
Low Voltage Wiring AC & DC Requirements
Condensate Drain Configuration
Filter Installation
Field Installed Power Wiring
Figure 9. Condensate Trap Installation
Main Unit Power
Standard Wiring
Optional TBUE Wiring
NOTICE Use Copper Conductors Only
Field Installed Control Wiring
Control Power Transformer
Hazardous Voltage
Installation
Packaged Heat Pump WC-IOM-7
Controls using 24 VAC
Installation
RTRM
Table 3. DC Conductors Zone Sensor Module wiring
Installation
Installation
Smoke Detector Customer Low Voltage Wiring
Figure 12. Smoke detector wiring
Installation
WC-IOM-7 Packaged Heat Pump
Packaged Heat Pump WC-IOM-7
Space Temperature Averaging
Installation
Table 4. Temperature vs. Resistance
Installation
Temperature
Hazardous Voltage
Voltage Imbalance
Installation
Electrical Phasing Three Phase Motors
Live Electrical Components
Compressor Crankcase Heaters Optional
Installation
ReliaTel Controls
Installation
Live Electrical Components
Packaged Heat Pump WC-IOM-7
Test Modes
Service test guide for component operation
Pre-Start
Pre-Start
Verifying Proper Air Flow
Units with Belt Drive Indoor Fan
ReliaTel Control
Return Air Smoke Detector
Pre-Start
Start Up
Economizer Start-Up
Rotating Components
Compressor Start-Up
Scroll Compressors
Start Up
Heating Start-Up
Final System Setup
Start Up
Rotating Components
Maintenance
Fan Belt Adjustment - Belt Drive Units
Maintenance
Monthly Maintenance
value shown in Table
Belt tension measurement and deflection ranges
Return Air Smoke Detector Maintenance
Cooling Season
Filters
Maintenance
Maintenance
Coil Cleaning
Heating Season
Maintenance
Hazardous Pressures
Final Process
Sample maintenance log
Maintenance
ReliaTel Control
Troubleshooting
Hazardous Service Procedures
Troubleshooting
System Status Checkout Procedure
Method
LED 1 System
LED 4 Service
Service Failure
System Failure
Method
Resetting Cooling and Heating Lockouts
Heat Failure
Cool Failure
Troubleshooting
Zone Temperature Sensor ZTS Service Indicator
Clogged Filter Switch
Fan Failure Switch
Troubleshooting
Zone Temperature Sensor ZTS Test
Test Zone Temperature Thermistor ZTEMP
Test
Cooling Set Point CSP and Heating Set Point HSP
LED Indicator Test, SYS ON, HEAT, COOL & SERVICE
Testing serial communication voltage
Programmable & Digital Zone Sensor Test
Test System Mode and Fan Selection
ReliaTel Refrigeration Module RTRM Default Chart
System mode and fan selection chart
Unit Operation without a Zone Sensor
Troubleshooting
ReliaTel Control
Unit Economizer Control ECA Troubleshooting
Troubleshooting
Wiring Diagrams
Drawing
Number
Description
Models Less Than 20 Tons for Commercial Use
Warranty
Heat Pump
Warranty
Standard Equipment Warranty Terms and Conditions
Commercial Equipment Warranty and Liability
Models Larger that 20 Tons for Commercial Use
Page
Literature Order Number
WC-IOM-7
Date
12/04