Technical Specifications

whl-648 Rev. 000 Rel. 003 Date 3.6.18
38
Part 6 - Installing the Condensate Drain
This condensing high eciency appliance has a condensate removal
system. Condensate is water vapor derived from combustion
products, similar to that produced by an automobile when it is
initially started. It is very important that the condensate line is sloped
down away from the appliance and to a suitable drain.
The condensate line must remain unobstructed. If allowed to freeze
in the line or obstructed in any other manner, condensate can exit
from the appliance tee, resulting in potential water damage to
property.
When installing a condensate pump, select one approved for use
with condensing appliances and furnaces. The condensate pump
should have an overow switch to prevent property damage from
spillage.
Condensate from the appliance will be slightly acidic (pH from 3.2 to
4.5). Check with your local gas company to determine if combustion
condensate disposal is permitted in your area. Install a neutralizing
lter if required by local codes.
NOTES:
1. Due to its ecient design, the appliance produces condensate
(water) as a normal by-product. This condensate is acidic, with a pH
level between 3 and 4. This condensate must be drained away from
the appliance and disposed in accordance with all local regulations.
2. Condensate line must be pitched at least ¼” per foot to properly
drain. If this cannot be done, or a very long length of condensate hose
is used, increase the condensate line to a minimum of 1” ID and place
a tee in the line after the condensate neutralizer to properly reduce
vacuum lock in the drain line.
3. Use corrosion-resistant materials to drain condensate. Use the
included exible plastic hose or ½” PVC and CPVC drain pipe complying
with ASTM D1785, F441, or D2665 may be used. Cement must comply
with ASTM D2564 for PVC pipe or F493 for CPVC pipe. For Canadian
applications, use CSA or ULC certied PVC or CPVC pipe, ttings, and
cement.
4. A frozen condensate line could result in a blocked vent condition.
It is very important to protect the condensate line from freezing
temperatures or any type of blockage. In installations that may
encounter sustained freezing conditions, the use of heat tape is
recommended to avoid freezing of the condensate line. It is also
recommended to bush up the condensate line size to 1” and terminate
Figure 28 - Internal Condensate
Trap
condensate discharge as close
to the unit as possible. Longer
condensate runs are more prone
to freezing. Damages due to
frozen or blocked condensate
lines ARE NOT covered by
warranty.
5. Support of the condensate
line may be necessary to avoid
blockage of the condensate ow.
6. Local building codes may
require an in-line neutralizer (1)
Figure 29 - Internal Condensate Trap
to be installed (not included) to
treat the condensate. If required
by local authorities, a condensate
lter of lime crystals, marble, or
phosphate chips will neutralize
slightly acidic condensate
(p/n 7450P-212 available from
Westinghouse). Follow all
the installation instructions
included with the neutralizer. If
a neutralizer is installed, periodic
replacement of the limestone
(or neutralizing agent) will be
required. The rate of depletion of
the limestone varies with usage
of the appliance. During the
rst year of appliance operation,
check the neutralizer every few
Figure 30 - Condensate Adapter
(Floor Models)
months for depletion.
7. Route the drain line to a nearby oor drain (2), laundry tub (3), or
condensate pump (4). If the appliance condensate outlet is lower
than the drain, you must use a condensate removal pump (kit p/n
554200 available from Westinghouse).
NOTE: If a nearby laundry tub is used as a disposal for waste water
from the washing machine, draining the condensate into this tub
allows the soapy water discharge to neutralize the acidic condensate.
8. An error will appear on the appliance display if condensate line is
blocked. The appliance will not operate with a blocked condensate
line. It is extremely important to have this condition repaired by a
qualied service technician.