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SECTION IV: INSTALLATION (cont .)
VENT & COMBUSTION AIR INTAKE (cont.)
• Over the wet primer, apply a medium coat of cement to the fitting socket and pipe joint
area.
• Insert pipe into fitting with a slight twisting motion. Ensure that the pipe is bottomed
into the fitting.
• Hold pipe and fitting for 30 seconds to prevent push off.
• Wipe off excess cement. Cure time may be up to 2 hours for Ø3" pipe at 60°F. Longer
cure time is required for larger diameter pipe and/or lower temperatures.
Note: The vent and combustion air intake pipe/fittings must overlap a minimum
of 1/2 inch (1.3 cm) at each joint. DO NOT drill or punch holes in the plastic pipe
or fittings.
Condensate Drain Kit
When downward sloping of the vent system is not possible or a vertical vent arrangement
is used, the condensate drain kit must be installed. Follow these steps to properly install
the kit:
• Turn off all electrical power to the water heater.
• Remove the cap from the exhaust adapter.
• Insert one end of the 3/8" OD plastic tube into the fitting on the exhaust adapter. There
should be a tight fit between the tube and the fitting. If the connection is not tight,
apply adhesive aluminum tape around the connection to secure.
• Form a trap by looping a portion of the plastic tube into approximately a 6" diameter
circle. With respect to the water heater, form the loop such that it can be mounted on
the upper 1/3 of the heater.
• Use the supplied loop clamps and screws to secure the tubing to the side of the water
heater and hold the loop trap in place.
• The condensate drain tube must terminate at a proper floor drain or run to a condensate
neutralizer (prior to the floor drain).
• Prime the loop trap with water prior to resuming operation of the water heater.
Disconnect the end of the tube that was connected to the exhaust adapter. With the
free end above the loop trap, pour water into the tube until the loop is filled halfway.
• Reconnect the free end to the exhaust adapter fitting and turn on electrical power to the
water heater.
Failure to prime the condensate drain loop with water will result in combustion gas
(which may contain carbon monoxide) entering the room. To avoid the risk of
asphyxiation from carbon monoxide, never operate the water heater unless the
condensate drain loop is sealed with water.
An example of this installation is shown in Figure 17.
DANGER
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