Installation Configurations - Whirlpool WFAU Installation Instructions Manual

Minimum Clearance to Combustibles Chart
All measurements in inches (centimeters)
Horizontal Installations (Models WFAR and WFLR only)
Cabinet Width Front
14¹⁄₂ (36.9) 4 (10.2)
17¹⁄₂ (44.4) 4 (10.2)
21 (53.3) 4 (10.2)
24¹⁄₂ (62.3) 4 (10.2)
1 May be 2" (5.1 cm) when Type B-1 vent pipe is used.
2 May be 1" (2.5 cm) when Type B-1 vent pipe is used.
3 Where values greater than 0 are shown, may be 0" when Type
High Altitude Installations
This furnace is approved for operation at altitudes from 0 to
4,500 ft (1,371.6 m) above sea level without any required
modifications.
From 4,500 to 7,500 ft (1,371.6 m to 2,286 m), the gas
manifold pressure needs to be adjusted according to the
information shown in the Manifold Pressure vs. Altitude
charts.
Models WFAU and WFLU must be installed only as an upflow
furnace. Models WFAT and WFLT may be installed as an upflow
or horizontal furnace. Models WFAR and WFLR may be installed
as either a counterflow or a horizontal furnace.
Models WFAR, WFLR, WFAT and WFLT furnaces can be
horizontally installed for airflow right to left or left to right.
Upflow Installations
WFAU, WFLU, WFAT and WFLT model furnaces can be installed
with either a side or bottom air return. For bottom air return the
bottom air return knockout plate must be removed. For units that
do not include a side or bottom return filter rack, kit no.
AFILT524-1 (side return) or kit no. AFILT529-1 (bottom return) can
be used.
To provide sufficient filter area for installations requiring more
than 1,600 CFM nominal air delivery, return air will have to be
brought through both sides of the furnace, or through one side
and the bottom, or an optional filter rack WAFILTHA7 may be
used.
Back Vent
1 0 6 (15.2)
1 0 6 (15.2)
1 0 6 (15.2)
1 0 6 (15.2)

Installation Configurations

Airflow
R to L
Top Bottom
2 3 (7.6) 2 0
2 2 (5.1) 2 0
2 1 (2.5) 0
2 1 (2.5) 0
B-1 vent pipe is used.
IMPORTANT:
For installations above 7,500 ft (2,286 m), the furnace input rate is
to be reduced per the requirements of the National Fuel Gas
Code (ANSI Z223.1/NFPA 54, latest edition), at the rate of 4
percent for each 1,000 ft (305 m) above sea level.
The furnace is not recommended for installation above 10,000 ft
(3,048 m).
Installation for Counterflow (Downflow) Models
Before installing counterflow (downflow) furnace on
combustible surface, such as wood, install one of the
following kits:
WABASE 511 (14.5" cabinets)
WABASE 512 (17.5" cabinets)
WABASE 568 (21" cabinets)
WABASE 569 (24.5" cabinets)
Contact your local dealer.
Failure to do so can result in death or fire.
IMPORTANT:
The furnace may be installed directly on the supply plenum or
coil cabinet if the furnace is installed on a noncombustible
floor.
L to R
Top Bottom
3 (7.6) 1 3 (7.6)
2 (5.1) 2 2 (5.1)
1 (2.5) 0
1 (2.5) 0
WARNING
Fire Hazard
2
2
5