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Aluminum or non--rusting shield recommended.
(See Vent Termination Shielding for dimensions).
*8" (203.2mm) Min.
20' (6.1m) Max.
in same
Inlet Pipe
atmospheric
(not used on
zone
Single Pipe
model)
Vent Pipes MUST be
supported
Horizontally and
Vertically
* 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).
Fig. 1 - - Typical Upflow Installation
See Vent Termination
Shielding in Vent Section.
*8" Min. (203 mm)
Inlet Pipe
20' Max. in same (6 M)
(not used on
atmospheric zone
Single Pipe
model)
Vent Pipes MUST
be supported Horizon-
tally and Vertically
Increase minimum from 8" " to 18" (203 to 457 mm) for cold climates (sustained temperatures
*
0°F ( - 1 8 °C ) and ) below for 24 or more consecutive hours).
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
Combustion Air Piping section).
5. Maintain clearance for fire safety and servicing. A front
clearance of 24" (607 mm) 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
wet at times.
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 even
when a coil box or cabinet is used.
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
A07700
Coupling on inside
and outside of wall to
restrain vent pipe
8" Min. (203 mm)
*8" Min. (203 mm)
20' Max. (6.1 M)
in same
atmospheric zone
25--23--33a
A07762
instructions.
(See
Vent
and
8. For horizontal installations, line contact is permissible
only between lines formed by intersection of back and two
sides of furnace jacket, and building joists, studs or
framing.
9. Residential garage installations require:
S Burners and ignition sources installed at least 18" (457 mm)
above the floor.
S Located or physically protected from possible damage by a
vehicle.
10. Local codes may require a drain pan under the entire
furnace and condensate trap when the furnace is installed
in attic application.
This furnace may be used for construction heat provided that all
the following conditions are met:
S The furnace is permanently installed with all electrical wiring,
piping, venting and ducting installed according to these
installation instructions. A return air duct is provided, sealed
to the furnace casing, and terminated outside the space
containing the furnace. This prevents a negative pressure
condition as created by the circulating air blower, causing a
flame rollout and/or drawing combustion products into the
structure.
S The furnace is controlled by a thermostat. It may not be "hot
wired" to provide heat continuously to the structure without
thermostatic control.
S Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and other
construction materials. It also prevents the entrainment of
drywall dust into combustion air, which can cause fouling and
plugging of furnace components.
S The temperature of the return air to the furnace is maintained
between 55° F (13° C) and 80° F (27° C) , with no evening
setback or shutdown. The use of the furnace while the
structure is under construction is deemed to be intermittent
operation per our installation instructions.
S The air temperature rise is within the rated rise range on the
furnace rating plate, and the firing rate has been set to the
rating plate value.
S The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
S The furnace, ductwork and filters are cleaned as necessary to
remove drywall dust and construction debris from all HVAC
system components after construction is completed.
S After construction is complete, verify furnace operating
conditions including ignition, input rate, temperature rise and
venting according to these instructions.
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.
6
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