Installation / Operation Instruction Manual

11
Venting System Condensation
Condensate formation does not occur in all installations of power 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 in (3 cm)) 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 molded exhaust adapter with drain
outlet is secured with one hose clamp, 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.
Venting Specifications for 40 Gallon (151.4 L)/50 Gallon (189.2 L):
This water heater is a power vented appliance and is designed to vent its products
of combustion through 2 in (5.1 cm) or 3 in (7.6 cm) diameter vent pipe to the
outdoors. The water heater may be either vented horizontally through the wall or
vertically through the roof. Use a 3 in (7.6 cm) to 2 in (5.1 cm) reducer to connect to
the vent outlet when using 3 in (7.6 cm) vent pipe. Apply proper cement at joint
locations. Table 1 lists the maximum vent lengths for this water heater using 2 in
(5.1 cm) vent 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
2 in (5.1 cm) vent pipe in Table 1 then use 3 in (7.6 cm) vent pipe for the vent
connector.
Table 2 lists the venting distances allowed with 3 in (7.6 cm) diameter vent pipe.
When venting with 3 in (7.6 cm) vent pipe, use a 3 in (7.6 cm) to 2 in (5.1 cm)
reducer to exit through the building wall with 2 in (5.1 cm) vent pipe. Use the 2 in
(5.1 cm) vent terminal supplied with the water heater to terminate on the outside of
the building. If the length of the 2 in (5.1 cm) needed to go through the wall is
greater than 14 in (35.6 cm), use 3 in (7.6 cm) vent pipe to go through the wall and
reduce to 2 in (5.1 cm) vent pipe immediately after exiting the outside wall. Refer to
the venting illustrations on the following pages. If replacing a water heater and the
existing vent terminal is identical to the vent terminal supplied with the new water
heater, replacement of the vent terminal is not required. The vent terminal should
be inspected to make sure that it is in good condition. Make sure the vent pipe
terminal is at least 1 in (2.5 cm) away from the edge of the wall.