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Any vent pipe seams should be installed so they are oriented on the top of horizontal pipe runs.
Slope exhaust piping towards the exhaust terminal with a 2% slope (¼ inch per foot; 19 mm/m) to ensure rain
or any accumulating condensate near termination are drained.
A condensate collector is required for this system when there is a vertical vent configuration. A condensate
collection point should be installed on the vertical run of piping just prior to the heater to ensure proper
condensate drainage. Check with local codes for proper disposition and handling of condensate water; an air
gaped drain is usually required and in some cases condensate neutralization is also required.
Do not store hazardous or combustible materials near the vent piping.
Ensure the air intake and vent termination points are at least 12” (300 mm) above any possible snow
accumulation level. The flows must not be impeded by snow or debris.
Ensure the air intake and vent termination points are at least 24” (600 mm) from any obstruction or other
objects.
The exhaust pipe must maintain adequate clearances and be insulated with a fireproof material if it passes
through walls made of flammable materials. Consult local codes and vent pipe manufacture documentation
for proper material selection and installation requirements.
Minimum clearance of listed Type B vent or vent connector from a combustible wall or partition must conform
to local code, or in the absence of local code, the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or the Natural
Gas and Propane Installation Code, CSA B149.1.
If the heater will be installed in a building that has a system that maintains a nega-
tive pressure, it is possible for a back-draft to allow outside air to be pulled into the
heater while not in operation. This can create a situation where freezing might oc-
cur within the heater. Please consult a professional for a properly designed venting
solution.
CAUTION
An 80 mm (3.15 in.) to 75 mm (3 in.) pipe reducer is included with this water heater to allow connection of
a 3 in. vent pipe.
Slide the pipe over the air intake terminal.
Using a level, ensure the pipe is straight up and down.
Attach the pipe to the air intake terminal.
Apply a bead of silicone around the pipe and air intake terminal, ensuring an air tight connection.
AIR INTAKE PIPE ASSEMBLY
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