Allow clearances from combustible materials as listed under
"C!ea,rances to Combustibles·, ensuring that seNice access is
allowed for both the burners and blower.
When the furnace is used in conjunction with a cooling coil, the
furnace must
be
installed parallel with or on the upstream side
of the cooling unit to avoid condensation in the primary heat
exchanger. When a parallel flow arrangement is used, the
_dampers or other means used jo control air flow shall be
adequate to prevent chilled air from entering the furnace, and
if manually operated, must be equipped with means to prevent
operation of either unit unless the damper is in the full heat or
cool position.
The furnace shall
be
located:
1.
Where a minimum amount of air intake/vent piping and
elbows will be required.
2.
As centralized with the air distribution as possible.
3.
han area where ventilation facilities provide for safe limits
of ambient temperature under normal operating condi
tions. Ambient temperatures must not fall below
32°F (0°
C).
4.
Where it will not interfere with proper air circulation in the
confined space.
5.
Where the outdoor combustion air/vent terminal will not
be
blocked or restricted.
6.
Where it will not interfere with the cleaning, seNicing or
- removal of other appliances.
COMBUSTION AIR A ND VENT S YSTEM
This furnace requires outdoor combustion air.
Two
separate,
properly-sized pipes must be used; one bringing outdoor air
from the accessory terminal kit outdoors to the furnace com
bustion air intake (top of unit), and one from the furna�e vent
connection (left or right side of unit) back to the termmal ktt
located outdoors.
The vent terminal kit should be located either through the wall
(horizontal or side vent) or through the roof (vertical vent). Care
should be taken to locate side vented systems where trees or
shrubs will not block or restrict supply air from entering or
combustion products from leaving the terminal. Also, the termi
nal assembly should be. located as far as possible from a
swimming pool or a location where swimming pool chemicals
might be stored. Be sure the terminal assembly follows the
outdoor clearances listed in the following table for U.S. instal
lations: In Ca
n
ada, refer to CAN/CGA-B 149.1 or
.2
Installation
9ode (latest edition -Venting Sys�ems and Air supply).
VENT TERMINATION (U.S. ONLY)
Dryer Vent
............................. ......... . ........... ..............
4 feet
Plumbing Vent Stack
.
.
....
..
.
.
....
.
.
.
.
.
..
.
..
....
..
.
...
.
.
.......
.
. .
.
.
3
feet
Gas Appliance Vent Terminal .
.
..
. .
.
.
.
. . .
..
.
.
.
.
.
.
.
...
.
.
.
.
.
.
.
.
..
. 1 foot
From any opening where vent
gas .coutd enter the building
.
.
.
.
. .
..
.
.
.
.
..
.
...
.
..
..
.
.
.
.
.
.
.....
.
1 foot
Above grade and anticipated
snow depth
...
.
.
....
.
.
.
.
.
..
.
.
.
.
.
.
.
...
.
..
.
.
..
.
..
.
.
.
..
.
..
.
.
....
. .
.
..
.
.....
1 foot
Above �rade when adjacent to
a publtc walkway·
.
. .
..
.....
.
.
..
.
.....
.
.
.
.
.
.
......
.
.
.
.
.
.
.
...
_.
.
..
.
.
.
.
..
7
feet
From electric, gas meters, regulators and rehef
equipll}ent - min. horizontal distance .
..
.
.
.
.
.
.
.
.
.
.
.
..
.
.
.
.
.
4
feet
NOTE:
Consideration must
be
given for degradation of building
materials by flue gases.
650.65-�
For proper vent/combustion air intake sizing and installation,
see the section of this instruction "Combustion AirNent Pipe
Sizing.·
UNIT INSTALLATION
DUCTWORK
The duct system's design and installation must:
1.
Handle an air volume appropriate for the seNed space and .
wit.hin the opera.ting parameters of the furnace specifica
tions.
2.
Be installed in accordance with standards of NFPA (Na·
tiona! Fire Protection Association) as outlined in NFPA
pamphlets 90A and 90B or applicable national, provincial,
local fire and safety codes.
3.
Create a closed duct system. The supply duct system must
be connected to the furnace outlet and the return duct
system must be sealed to the furnace inlet casing. Both
supply and return duct systems must terminate outside the
space containing the furnace.
4.
Generally complete a path for heated or cooled. air to
circulate through the air condition�ng and heating equip
ment and to and from the conditioned space.
NOTE:
The supply air temperature differential between the
side discharge versus front to back discharge is substan
tial./! is recommended that whenever possible position the
furnace so left and right side supply air is dominate.
After the unit is in the desired position, fasten the supply
ductwork to the furnace duct flanges. A removable access
panel should
be
provided in the outlet duct such that smoke or
reflected light would be obseNable inside the casing to indicate
the presence of leaks in the heat exchanger. This access cover
shall be attached in such a manner as to prevent leaks. Flexible
duct connectors are recommended to connect both the supply
and return ducts to the furnace.
Return air ductwork may be connected to an upflow furnace in
one of the following two ways:
1. Bottom Return - Before attaching the ductwork to the
furnace bottom, see the "Filters• section of this instruction.
2.
Side Return - Cut a hole in the side panel of the furnace
using the right-angle markings (See Figure 1) as a guide
for position and size of the opening. Install a single side
return filter ·frame accessory if one is required. If this
accessory is not needed, the ductwork can
be
fastened
directly to the fumace opening.
NOTE:
Some accessory side filter packages require cutting
c.
slightly larger opening.
CORNER
M.'.FU<INGS
FIGURE
1
-SIDE RETURN CUTOUT MARKINGS
