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Connect Condensate Drain; Install Duct Work - Whirlpool WPG Installation Instructions Manual

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Connect Condensate Drain

The condensate drain outlet is a ³⁄₄ in. threaded PVC fitting
located at the bottom on the side of the furnace. A ³⁄₄ in. drain line
with trap must be installed on all applications to prevent
accumulation of condensate under or around the unit.
Install Condensate Trap
1. Construct the condensate trap from PVC tubing as shown in
"Condensate Trap Construction."
NOTES:
The condensate trap allows a standing column of water of
at least 2 in. (50 mm).
The top of the outlet from the condensate trap must be at
least 1 in. (25 mm) below the top of the outlet.
The trap should be installed as close to the furnace as
possible, while still providing proper drainage.
Do not block heat exchanger access panel with drain line.
2. Thread the drain assembly into the ³⁄₄ in. PVC fitting.
NOTE: Do not glue the threaded fitting.
3. Run the drain line to an open drain or other suitable disposal
point.
1
1"
2"
3"
2
³⁄₄
1.
in. PVC fitting (threaded)
³⁄₄
2.
in. drain line
3. 3 in. from top of outlet to bottom of trap
Remove Blower Shipping Support
The furnace is shipped with a corrugated shipping support
mounted under the blower motor housing. This blower support
must be removed before operating the unit.
1. Remove the blower access panel on the exhaust vent side of
the unit.
2. Remove and discard the blower shipping support by sliding it
away from the blower assembly as shown.
NOTE: It may be necessary to pull up slightly on the blower
assembly to remove the corrugated support.
6
3. Replace the blower access panel.
1. Blower shipping support

Install Duct Work

Install duct work in accordance with NFPA 90B and any local
codes.
The use of flexible, non-combustible connectors between the
main trunk ducts and the supply and return air plenums is
recommended to minimize vibration transmission.
Plenums must be individually sealed to unit casing with ducts
terminating inside the structure.
Flashing used to cover ductwork must permit removal of
access panels and top. See "Minimum Clearances" in the
"Locations Requirements" section.
Large chassis models WPG148, WPG 248, WPG 160 and
WPG 260 have 2 horizontal return air duct openings. Both
return openings must be used for horizontal applications.
Filters
Filters are not supplied with these furnaces; however, filters must
be used. It is the installer's responsibility to install a filter rack with
the duct work and to install properly sized filters in accordance
with the "Minimum Filter Requirements Chart."
All return air must pass through a filter before entering the unit.
An electronic air cleaner, filter rack or other accessible filter
arrangement must be installed in the return air ductwork.
Minimum recommended filter areas are listed in the Minimum
Filter Requirements Chart, and are based on a face velocity of
325 ft. (99.1 m) per min. for disposable filters and 525 ft. (160 m)
per min. for cleanable filters.
Minimum Filter Requirements Chart
Nominal
Nominal
Cooling Tons
Airflow
Range (CFM)
2
700 - 900
2¹⁄₂
875 - 1125
3
1050 - 1350
3¹⁄₂
1225 - 1575
4
1400 - 1800
5
1750 - 2250
1
Minimum Filter Sizes
Disposable
Cleanable
Filters
Filters
(1) 20 x 20
(1) 15 x 20
(1) 20 x 25
(1) 15 x 20
(1) 25 x 25
(1) 20 x 20
(2) 15 x 25
(1) 20 x 20
(2) 20 x 20
(1) 25 x 25
(2) 20 x 25
(1) 25 x 25

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