2
This furnace has been designed and manufactured to give the
most reliable performance possible. Each unit has been given a
running inspection before shipment to assure that every component
is operating efficiently.
The safe and dependable operation of the furnace depends upon
proper installation and compliance with all national and local
codes and standards.
INSTALLATION AND OPERATING INSTRUCTIONS
1. LOCATION – The furnace should be centrally located to the
heating area.
2. POSITIONS – It can be installed for vertical, horizontal or
downflow operation. When installed horizontally, the furnace
should be positioned such as the door will not end up being on
the top. The door should be on the side of the furnace, to
ensure that the motor bearings are in their designed position.
In vertical downflow installations, use only “L”- or “T”-shaped
plenum with no openings or registers directly below furnace.
3. INSTALLATION CLEARANCES – As shipped from the factory,
each unit is approved for “zero inch” clearance. If additional
clearance is required, it will be indicated on the data label
attached to the furnace.
4. TEMPERATURE RISE – Furnaces are shipped to operate at
0.20” (5 mm) W.C. (50 Pa) external static pressure. They are
certified for operation up to 0.50” (13 mm) W.C. (125 Pa). Check
the following page for temperature rise table on specification
chart and, if necessary, adjust the unit to match.
5. SERVICE CLEARANCE – Units are serviced from the FRONT.
Leave at least 24” (610 mm) clearance in front of the door.
GENERAL REQUIREMENTS AND SPECIFICATIONS
FK0003A
FRONT VIEW
RIGHT SIDE VIEW
REAR VIEW
LEFT SIDE VIEW
TOP VIEW
1½”
(38 mm)
1½”
(38 mm)
20”
(508 mm)
20”
(508 mm)
1”
(25 mm)
39”
(991 mm)
FILTER FRAME
(EITHER SIDE, REAR
OR BOTTOM)
1½” x 1½” KO
(38 mm x 38 mm)
1½” x 1½” KO
(38 mm x 38 mm)
1½” x 1½” KO
(38 mm x 38 mm)
WIRING KO’S
A
B
C
WIRING KO’S
C
A = 1” (25 mm)
B = 1/4” (6 mm) & 1¼” (32 mm)
C = 1/2” (13 mm) & 1½” (38 mm)
WIRING KO’S VALUES
DISCHARGE
17” x 17”
(432 mm x 432 mm)
18” x 18”
(457 mm x 457 mm)
RETURN
18” x 18”
(457 mm x 457 mm)
RETURN
18” x 18”
(457 mm x 457 mm)
RETURN
CAUTION
This unit must be installed in a dry place, in a non-corrosive, well-ventilated environment, without excessive dust. The ambient
temperature must be over 10°C and under 27°C. If the ambient temperature is 10°C or less, the plenum must be insulated on 10
ft linear minimum length.
