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Part 1 - General Safety Information
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This boiler is approved for indoor installations only and is not intended
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for use as a pool heater. Clearance to combustible materials: 0" top,
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bottom, sides, and back. Boiler must have room for service: 24" front,
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18" top, 12" bottom, and 0" back are minimum recommended service
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clearances. Minimum recommended side clearances depend on
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model and installation options. (A combustible door or removable
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panel is acceptable front clearance. A 3" minimum clearance must
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be provided from the boiler front cover to the removable panel or
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combustible door.) This boiler has been approved for closet installation
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and installation on combustible flooring. Do not install directly on
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carpeting. Install the boiler in a location where relief valve discharge
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or a leak will not result in damage to the surrounding area. If such a
location is not available, install an auxiliary catch pan. The appliance
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is rated Category IV (pressurized vent, likely to form condensate in
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the vent) and requires a special vent system designed for pressurized
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venting. Use only Category IV vent systems.
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WARNING
!
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Installer - Read all instructions in this manual before installing.
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Perform steps in the given order.
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User - This manual is for use only by a qualified service technician.
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Have this boiler serviced / inspected annually by a qualified service
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technician.
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FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE
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CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE
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PERSONAL INJURY, OR DEATH.
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NOTE: Obey all local codes. Obtain all applicable permits before
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installing the boiler.
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NOTE: Install all system components and piping in such a manner
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that does not reduce the performance of any fire rated assembly.
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A. Operation and Installation Warnings
To avoid serious injury or death, read, understand, and follow all of the
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precautions listed here.
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!
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Vapors from flammable liquids will explode and can cause a fire,
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resulting in personal injury or death. The boiler has a burner that
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can come on at any time and ignite vapors. DO NOT use or store
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flammable liquids around the boiler.
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Improper venting can cause a build-up of carbon monoxide.
Breathing carbon monoxide can result in brain damage or death. DO
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NOT operate the boiler unless it is properly vented to the outside
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and has an adequate fresh air supply for safe operation. Inspect the
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exterior exhaust gas outlet port and fresh air inlet port on a regular
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basis to ensure they are functioning properly.
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A concentration of carbon monoxide as small as .04% (400 parts
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per million) in the air can be fatal. When making high fire or low
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fire adjustments, CO levels must be monitored using a calibrated
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combustion analyzer such that a CO level of no more than 150 ppm
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is exceeded at any time during operation.
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Adjusting the "low fire offset" or the "main flow restrictor" in small
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increments can result in a significant increase in CO concentration.
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To avoid serious injury or death, DO NOT make any adjustments
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to the gas valve without monitoring the exhaust gases with a fully
functional and calibrated combustion analyzer.
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Failure to follow these instructions will result in property damage,
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severe personal injury, or death.
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WARNING
!
After installation, all boiler safety devices should be tested.
DANGER
whl-648 Rev. 001 Rel. 003 Date 10.8.19
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