Installation / Operation Instruction Manual

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 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.

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.

Venting Specifications for 55 gal (208.2 L), 75 gal (283.9 L)

This water heater is a power vented appliance and is designed to vent its products of

combustion through 3 in. (7.6 cm) or 4 in. (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 in. (7.6 cm) to 4 in. (10.2 cm) reducer to connect to the vent outlet

when using 4 in. (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 in. (7.6 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 3 in. (7.6 cm) vent

pipe in Table 1, then use 4 in. (10.2 cm) vent pipe for the vent connector.

Table 2 lists the venting distances allowed with 4 in. (10.2 cm) diameter vent pipe. When

venting with 4 in. (10.2 cm) vent pipe, use a 4 in. (10.2 cm) to 3 in. (7.6 cm) reducer to

exit through the building wall with 3 in. (7.6 cm) vent pipe. 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. Use the 3 in. (7.6 cm) vent terminal

supplied with the water heater to terminate on the outside of the building. If the length of

3 in. (7.6 cm) vent pipe needed to go through the wall is greater than 14 in. (35.5 cm),

use 4 in. (10.2 cm) to go through the wall and reduce to 3 in. (7.6 cm) vent pipe

immediately after exiting the outside wall. Refer to the venting illustrations on the

following pages. Make sure the vent pipe terminal elbow fitting is at least 1 in. (2.5 cm)

away from the edge of the wall.