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Figure 2
Typical Downflow Installation
See Vent Termination
Shielding in Vent Section.
*8² Min.
20¢ Max.
Inlet Pipe
in same
(not used on
Single Pipe
atmospheric zone
model)
Vent Pipes MUST be
supported Horizontally
and Vertically
* Increase minimum from 8² to 18² for cold climates (sustained temperatures
below 0°F).
!
DEATH, PERSONAL INJURY AND/OR PROPERTY
DAMAGE HAZARD.
Failure to properly install this furnace can result in death,
personal injury and/or property damage.
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 for combustion air
evaluation and remedy.
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 the vent pipes as short as practical. (See Gas Vent
Installation section).
4.
Do NOT install furnace directly on carpeting, tile or other com-
bustible material other than wood flooring.
5.
Maintain clearance for fire safety and servicing. A front clear-
ance of 30² is minimum for access to the burner, controls and
filter. See clearance requirements in Figure 3 or.
6.
Use a raised base if the floor is damp or wet at times.
7.
Residential garage installations require:
·
Burners and ignition sources installed at least 18² (457 mm)
above the floor.
·
Furnace must be located or physically protected from pos-
sible damage by a vehicle.
8.
If the furnace is to be suspended from the floor joists in a base-
ment or a crawl space or the rafters in an attic, it is necessary
to use steel pipe straps or an angle iron frame to attach the fur-
nace. These straps should be attached to the furnace with
sheet metal screws and to the rafters or joists with bolts. The
440 01 1020 02
preferred method is to use an angle iron frame bolted to the
rafters or joists.
This furnace may be used for construction heat provided that:
Coupling on inside
and outside of wall
·
The furnace is permanently installed with all electrical wiring,
to restrain vent pipe
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 con-
8² Min.
taining the furnace. This prevents a negative pressure con-
dition as created by the circulating air blower, causing a
flame rollout and/or drawing combustion products into the
structure.
·
The furnace is controlled by a thermostat. It may not be "hot
*8² Min.
wired" to provide heat continuously to the structure without
20¢ Max.
thermostatic control.
in same
atmospheric zone
·
Clean outside air is provided for combustion. This is to mini-
mize 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.
·
The temperature of the return air to the furnace is no less
than 55° F, with no evening setback or shutdown. The use of
the furnace while the structure is under construction is
25--23--33a
deemed to be intermittent operation per our installation in-
structions.
·
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.
·
The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
·
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.
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 at-
tached 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 at-
tached to the back of the furnace.
Furnace Installation Considerations
The installation of the furnace for a given application will dictate the
position of the furnace, the airflow, ductwork connections, vent and
combustion air piping. Consideration must be given to the follow-
ing:
Condensate Trap and Drain Lines
The supplied condensate trap must be attached to the furnace side
panel on either the left or right side. For horizontal installations, the
drain trap is vertically attached to the side panel below the furnace.
A minimum clearance of 6² below the furnace is required for the
condensate trap. Downward slope of the condensate drain line
from the condensate trap to the drain location must be provided.
Adequate freeze protection of the drain trap and the drain line must
be provided. See "Condensate Drain Trap" section for further de-
tails.
5
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