Main
Models:
CWD Series
Gas-Fired Direct Vent Hot Water Boilers INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
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I Product Description
II Speci cations
TABLE 1: SPECIFICATIONS
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III Before Installing
IV Locating the Boiler
NOTICE
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V Air for Combustion and Ventilation
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Step 2: Determine whether the boiler is to be installed in a con ned space
Step 3: Decide whether the boiler will be direct vented or direct exhausted
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Step 5: If Indoor Combustion Air is Used, Provide Air as Follows:
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VI Venting
A. Vent System Design
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TABLE 3a: SUMMARY OF HORIZONTAL VENTING OPTIONS
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TABLE 3c : SUMMARY OF VERTICAL COAXIAL VENTING OPTIONS
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TABLE 4: PERMISSIBLE VENT SYSTEMS AND PRINCIPLE VENT COMPONENTS
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B. Removing an Existing Boiler From a Common Chimney
TABLE 5a: VENT FITTING EQUIVALENT LENGTH
TABLE 5b: AIR INTAKE FITTING EQUIVALENT LENGTH
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C. Vent / Intake System Assembly
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TABLE 6: FAN OUTLET ORIFICE
NOTE
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VII Gas Piping
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VIII System Piping
A. Standard Piping
DANGER
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B. Piping for Special Situations
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IX Wiring
A. CB502 System - Single Zone Wiring
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C. CB502 Control System Sequence of Operation
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D. R8285 Control System - Single Zone Wiring
E. R8285 Control System - Wiring Variations
F. R8285 Control System Sequence of Operation
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X Start-up and Checkout
NOTE
OPERATING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE
FOR YOUR SAFETY READ BEFORE OPERATING
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XI Service and Maintenance
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Heat Exchanger Cleaning Procedure
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Service Notes
Do not leave the boiler in service with the intake cover removed.
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PAGE 1 OF 4
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PAGE 2 OF 4
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PAGE 3 OF 4
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PAGE 4 OF 4
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TROUBLESHOOTING CHART FOR BOILERS WITH R8285 CONTROL SYSTEM - PAGE 1 OF 2
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TROUBLESHOOTING CHART FOR BOILERS WITH R8285 CONTROL SYSTEM - PAGE 2 OF 2
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TROUBLESHOOTING CHART FOR IGNITION SYSTEMS USING UT 1003-626A IGNITION MODULE
XIII PARTS
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BLOCK, BASE, FLUE COLLECTOR COMPONENTS
* NOT PICTURED
KEY DESCRIPTION PART
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BURNER TRAY COMPONENTS
KEY DESCRIPTION PART#
OR QTY.
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JACKET COMPONENTS
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COMMON CONTROLS & TRIM
CONTROLS UNIQUE TO CB502 CONTROL SYSTEM
CONTROLS UNIQUE TO R8285 CONTROL SYSTEM
