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5
INSTALLATION
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 Combustion Air
Check in Gas Vent Installation section. This furnace MUST be
vented to the outside.
!
WARNING
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 Fig. 1 for typical installation and basic connecting
parts required. Refer to Fig. 4 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 fur-
nace where the old one was. Choose the location or evaluate
the existing location based upon the minimum clearance and
furnace dimensions (Fig. 2).
FROZEN AND BURST PIPE HAZARD
Failure to follow this caution may result in property damage.
Special precautions MUST be made is installing f urnace 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 drain line must
be protected. The use of electric heat tape or RV antifreeze is
recommended for these installations. (See “Condensate Trap
Freeze Protection Section”)
CAUTION
!
Vent PipesMUST be
supported
Horizontally and
Vertically
*8″ (203.2mm) Min.
20′ (6.1m) Max.
insameatmosphericzone
*8″ (203.2mm) Min.
20′ (6.1m) Max.
in same
atmospheric
zone
Coupling on ends of
exhaust pipe. Total
pipe & coupling out-
side structure = 8″
(203.2mm)
Aluminum or non--rusting shield recommended.
(See Vent Termination Shielding for dimensions).
* Increase minimum from 8″
″
(203.2mm) to 18
″
(457.2mm) for cold climates (sus-
tained temperatures 0
°
F(-17
°
C) and below for 24 or more consecutive hours).
DISCHARGE AIR
25--23 --33
Inlet Pipe
(not used on
Single Pipe
model)
A07700
Fig. 1 -- Typical Upflow Installation
*8″ Min. (203 mm)
20′ Max.insame (6 M)
atmosphericzone
Vent Pipes MUST
besupportedHorizon-
tally and Vertically
*
Increase minimum from8″
″
to 18
″
(203 to 457 mm) for cold climates(sustained temperatures
0
°
F(-18
°
C ) and ) below for 24 ormore consecutive hours).
See Vent Termination
Shielding in Vent Section.
*8″ Min. (203 mm)
20′ Max. (6.1 M)
in same
atmospheric zone
8″ Min. (203 mm)
Couplingoninside
andoutsideofwallto
restrain vent pipe
25--23--33a
Inlet Pipe
(not used on
Single Pipe
model)
A07762
Fig. 2 -- Typical Downflow Installation
Installation Requirements
1. Install furnace level.
2. This furnace is NOT to be used for temporary heat of
buildings or structures under construction.
3. Install furnace as centralized as practical with respect to the
heat distribution system.
4. Install the vent pipes as short as practical, and in accordance
to these instructions. (See Vent and Combustion Air Piping
section).
5. Maintain clearance for fire safety and servicing. A front
clearance of 24″ (609.6mm) required and 30″ (762mm)
recommended for access to the burner, controls and filter .
See clearance requirements in Fig. 4.
6. Use a raised base for upflow furnace if the floor is damp or
wetattimes.
7. For downflow installations, non combustible subbase must
be used under the furnace unless installation is on a non
combustible floor surface. This requirement applies e ven
when a coil box or cabinet is used.
58HDV