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Installation Configurations - Whirlpool WFM18 Installation Instructions Manual

80% single-stage multispeed gas furnace
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Installation Clearances and Accessibility
Unobstructed front clearance of 24" (61 cm) for servicing is
recommended.
Clearances to Combustibles—in. (cm)
Vent Pipe
B1-Vent
Single Wall
Connector Sides Front Back Top (Plenum)
1 (2.5)
6 (15.2)
1 (2.4)
NOTE: Top clearance for horizontal configuration is 1" (2.5 cm).
A
A. Top clearance—1" (2.5 cm)
B. Vent pipe clearance—6" (15.2 cm)
for single wall connector, 1"
(2.5 cm) for B-1 vent
High Altitude Installations
High Altitude Derate
IMPORTANT: The furnace will naturally derate itself with altitude.
Do not attempt to increase the firing rate by changing orifices or
increasing the manifold pressure. This can cause poor
combustion and equipment failure.
High altitude installations may require both a pressure switch and
an orifice change. These changes are necessary to compensate
for the natural reduction in the density of both the gas fuel and
the combustion air at higher altitude.
3 (7.6)
0
1 (2.5)
B
C
E
C. Back clearance—0"
D. Side clearance—1" (2.5 cm)
E. Front clearance—3" (7.6 cm)
For installations above 7,000 ft (2,133.6 m), refer to your local
distributor for required kit(s).
Gas
Altitude
Natural
0 to
7,000 ft
Propane
(2,133.6 m)
NOTE: In Canada, gas furnaces are only certified to 4,500 ft
(1,371.6 m).
Contact your local distributor for a tabular listing of appropriate
manufacturer's kits for propane gas and/or high altitude
installations. The indicated kits must be used to insure proper
furnace operation. All conversions must be performed by a
qualified installer or service agency.
Propane Gas Conversion
D
Failure to follow these instructions can result in bodily
injury or death. Carefully read and follow all instructions
given in this section.
This unit is configured for Natural gas. The appropriate
manufacturer's propane gas conversion kit must be applied for
propane gas installations.
Contact your local distributor for a tabular listing of appropriate
manufacturer's kits for propane gas and/or high altitude
installations. The indicated kits must be used to insure safe and
proper furnace operation. All conversions must be performed by
a qualified installer or service agency.
Horizontal Installation
Line contact to framing is permitted when installed in the
horizontal configuration. Line contact is defined as the portion of
the cabinet that is formed by the intersection of the top and side.
IMPORTANT: Accessibility clearance, where greater, should take
precedence over minimum fire protection clearance.
A gas-fired furnace for installation in a residential garage must be
installed so that the ignition source and burners are located not
less than 18" (45.7 cm) above the floor and are protected or
located to prevent physical damage by vehicles.
A gas furnace must not be installed directly on carpeting, tile, or
other combustible materials other than wood flooring.
Manifold
Pressure
High
Kit
Orifice
Stage
None #43
3.5"
W.C.
LPM-
#55
10.0"
03B
W.C.
WARNING
Goodman 53

Installation Configurations

Pressure
Low
Switch
Stage
Change
1.9"
None
W.C.
6.0"
None
W.C.
7

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