Installation; Location And Clearances - International comfort products N9MP1 Installation Instructions Manual

Installation

WARNING
!
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning 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 Combus-
tion Air Check in Gas Vent Installation section. This
furnace MUST be vented to the outside.

Location and Clearances

1. Refer to Figure 1 or Figure 2 for typical installation and
basic connecting parts required. Refer to Figure 5 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 3).
Figure 1
Typical Upflow Installation
Aluminum or non-rusting shield recommended. (See Vent
Termination Shielding for dimensions).
*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, (457.2mm) for cold climates (sus­
tained temperatures 05 F (-175 C) and below for 24 or more consecutive hours).
6
Coupling on ends of
exhaust pipe. Total
Inlet Pipe
pipe & coupling out­
(not used on
side structure = 8"
Single Pipe
(203.2mm)
model)
*8" (203.2mm) Min.
20' (6.1m) Max.
in same atmospheric zone
25−23−33
Specifications are subject to change without notice
Figure 2 Typical Downflow Installation
See Vent Termination
Shielding in Vent Section.
(203.2mm)
Inlet Pipe *8"
(not used on (6.1m)
20'
Single Pipe
same atmospheric zone
model)
Vent Pipes MUST
be supported Hori­
zontally and Vertically
* Increase minimum from 8, (203.2mm) to 18, (457.2mm) for cold climates (sus­
tained temperatures 05 F (-175 C) and below for 24 or more consecutive hours).
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
Failure to follow this caution 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")
Do NOT operate furnace in a corrosive atmosphere
containing chlorine, fluorine or any other damaging
chemicals. Refer to Combustion & Ventilation Air section,
Contaminated Combustion Air.
Coupling on inside
and outside of wall to
restrain vent pipe
Min.
8" Min.
Max. in
(203.2mm)
*8" Min.
(6.1m)
20' Max.
in same
atmospheric zone
25−23−33a
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