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Installation
WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to properly vent this furnace or other
appliances could result in personal injury or death.
This furnace can NOT be common vented or
connected to any type B, BW or L vent or vent
connector, nor to any portion of a factory−built or
masonry chimney. If this furnace is replacing a
previously common-vented furnace, it may be
necessary to resize the existing vent and chimney
to prevent oversizing problems for the other
remaining appliance(s). See Venting and
Combustion Air Check in the Combustion &
Ventilation Air section. This furnace MUST be
vented to the outside.
Installation Positions
This furnace can be installed in an upflow, horizontal (either left or
right) or downflow airflow position. DO NOT install this furnace on
its back. For the upflow position, the return air ductwork can be
attached to either the left or right side panel and/or the bottom. For
horizontal and downflow positions, the return air ductwork must be
attached to the bottom. The return air ductwork must never be
attached to the back of the furnace.
Location and Clearances
1.
Refer to Figure 1 or Figure 2 for typical installation and
basic connecting parts required. Refer to Figure 3 for
typical horizontal direct vent installation and basic
connecting parts required. Supply and return air plenums
and duct are also required.
2.
If furnace is a replacement, it is usually best to install the
furnace where the old one was. Choose the location or
evaluate the existing location based upon the minimum
clearance and furnace dimensions (Figure 4).
WARNING
!
CARBON MONOXIDE POISONING HAZARD.
Failure to follow this warning could result in
personal injury or death.
Do NOT operate furnace in a corrosive atmosphere
containing chlorine, fluorine or any other damaging
chemicals, which could shorten furnace life.
Refer to Combustion & Ventilation Air section,
Contaminated Combustion Air for combustion air
evaluation and remedy.
CAUTION
!
FROZEN AND BURST WATER PIPE HAZARD
FaiIure to protect against the risk of freezing may
result in property damage.
Special precautions MUST be made if installing
furnace in an area which may drop below freezing.
This can cause improper operation or damage to
equipment. If furnace environment has the
potential of freezing, the drain trap and drainline
must be protected. The use of electric heat tape or
RV antifreeze is recommended for these
installations. (See "Condensate Trap Freeze
Protection Section")
6
*8" (203.2mm) Min.
20' (6.1m) Max.
in same
atmospheric
zone
Vent Pipes MUST be
supported
Horizontally and
Vertically
* Increase minimum from 8, (203.2mm) to 18, (457.2 mm) for cold climates (sus
tained temperatures 05 F (-175 C) and below for 24 or more consecutive hours).
Vent Pipes MUST
be supported Horizon
tally and Vertically
* Increase minimum from 8, (203.2mm) to 18, (457.2 mm) for cold climates (sus
tained temperatures 05 F (-175 C) and below for 24 or more consecutive hours).
Specifications are subject to change without notice.
Figure 1
Typical Upflow Installation
Aluminum or non-rusting shield recommended.
(See Vent Termination Shielding for dimensions).
Inlet Pipe
(not used on
Single Pipe
model)
Figure 2
Typical Downflow Installation
See Vent Termination
Shielding in Vent Section.
Inlet Pipe
(203.2mm)
*8"
(6.1m)
(not used on
20'
Single Pipe
same atmospheric zone
model)
Coupling on ends of
exhaust pipe. Total
pipe & coupling out
side structure = 8"
(203.2mm)
*8" (203.2mm) Min.
20' (6.1m) Max.
in same atmospheric zone
25−23−33
Coupling on inside
and outside of wall to
restrain vent pipe
Min.
8" Min.
Max. in
(203.2mm)
*8"
(6.1m)
20'
Max.
in same
atmospheric zone
25−23−33a
440 01 1051 02
Min.
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