P/N 472592 Rev. C 10-5-07
22
Section 3. Installation
4. Install vent pipe so that it can expand and contract freely as the temperature changes. Support the vent pipe according
to applicable codes and the vent manufacturer’s instructions. Pipe support must allow the vent pipe free movement
out and back, from side to side, or up and down as necessary, without putting a strain on the heater or vent body. Slope
horizontal pipe runs up from the heater at least 1/4" per foot (2cm per meter). Install Listed condensate drains at low
points where condensate might collect. Plumb condensate drains to a drain through hard piping or high temperature
tubing such as silicone rubber or EPDM rubber – do not use vinyl or other low temperature tubing. Follow drain
manufacturer’s installation instructions.
5. Use Listed fire stop for floor and ceiling penetrations. Use Listed thimble for wall penetrations. Use a Listed roof
flashing, roof jack, or roof thimble for all roof penetrations. Do not fill the space around the vent (that is, the clear air
space in the thimble or fire stop) with insulation. The roof opening must be located so that the vent is vertical.
6. Do not run the heater vent into a common vent with any other appliance.
WARNING
Fire Hazard. Do not vent the heater directly into a masonry chimney. Installation into a masonry chimney must use a
chimney liner and must meet the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CSA B149.1, Natural Gas and Propane
Installation Codes requirements and all local code requirements.
WARNING
Risk of fire, carbon monoxide poisoning, or asphyxiation. It is recommended to use a CO Monitor and Fire Alarm in rooms
that contain gas fired appliances.
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