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Venting System Condensation
Condensate formation does not occur in all installations of power direct vented
water heaters, but should be protected against on installations where
condensation can form in the venting system.
Formation of condensation in the venting system of Power Vented water
heaters is dependent upon installation conditions including, but not limited to:
ambient temperature and humidity of installation location;
ambient temperature and humidity of venting space;
vent distance and slope;
and product usage.
In order to effectively control condensate from adversely affecting the
mechanical components of the water heater several methods may be
employed:
1. For horizontal installations the vent pipe can be installed with a
downward slope (not less than 1/8" (3 mm)) and away from the blower.
2. In order to prevent condensate from draining back into the blower
(vertical or horizontal runs), an optional condensate kit is available as a
service part (Condensate kit, p/n 239-45875-00). A factory supplied
exhaust adapter with drain outlet mounts directly to the blower outlet
and is secured with two hose clamps, one to the blower and the other
to the vent pipe. Tubing is provided to drain any accumulated
condensate away from the water heater and to a suitable drain. The kit
comes complete with instructions for proper installation.
PART I - Venting Specifications for:
48 Gallon (181.6L)
65 Gallon (246.0L)
75 Gallon (283.9L)
This water heater is a power vented appliance and is designed to intake and
exhaust the products of combustion through 3" (7.6 cm) or 4" (10.2 cm)
diameter vent pipe to the outdoors. This water heater may be either vented
horizontally through the wall or vertically through the roof. Use a 3" (7.6 cm) to
4" (10.2 cm) reducer to connect to the intake and outlet when using 4" (10.2
cm) vent pipe. Apply the proper cement at the joint locations. Table 1 lists the
maximum vent lengths for this water heater using 3" (7.6 cm) intake and
exhaust pipe. If possible, locate the water heater so that the venting length and
number of elbows are kept to the minimum distance necessary to reach the
outside. If the installation requires venting lengths that exceed the lengths
listed for 3" (7.6 cm) vent pipe in Table 1, then use 4" (10.2 cm) vent pipe for
the vent connector.
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