Installation Instructions

Installing Your Furnace
CAUTION: Do not run wire behind flanges of
header plate or in any location where it might be
damaged. Avoid splicing thermostat wire unless the
spliced wires are properly cleaned, soldered and
taped.
Surface Mount Installation
FIND THE STUDS AND CEILING JOISTS
(See CAUTION on page 7)
Find two studs at spot where furnace is to be placed. Use a stud
indicator or small finishing nails. Repeatedly drive and remove a
nail into the wall in the area of the stud until you find it. Then find
one side. Leave the nail there. Drive another nail just on the other
side of the same stud.
Inside edge of the other stud should be about 14-1/2 inches from
the one found. Drive finishing nail on inside edge of this stud.
Using the nails as a guide, draw a line up both sides to the ceiling
to locate hole cut out for vent pipe and electrical connections.
CUT CEILING OPENING
Mark off and cut 3-1/2 x 12 inch rectangular hole in ceiling,
centered between wall studs. The back edge of the opening
should be about 1/8 inch from the wall. As shown on Page 15, Fig.
16.
ELECTRICAL SUPPLY ROUGH-IN
The electrical supply openings must be made in the wall or floor
below furnace to match holes in furnace bottom. See Fig. 13.
If desired, the power supply and thermostat cable can come into
the wall stud space from a basement, crawl space or an adjoining
stud space.
At selected location, drill a 1-inch hole for 115V power supply and
a ½ inch hole for the thermostat cable.
Run wiring through the holes to the furnace leaving enough
excess wire to make electrical connections after mounting
furnace.
CAUTION: To avoid damage to wiring, be sure to
route wire away from path of furnace vent.
GAS SUPPLY OPENING
A hole may need to be drilled for the gas line supply.
Decide whether the gas line will come through the floor or wall.
FIGURE 13 Knockout Dimensions
FIGURE 12
Closed
O
ff Stud Space (If
R
equired)
(1)
MODELS :
5508231
;
5508232
6508631; 6508632
(2) MODELS : 5008631; 5008632
(3) MODELS : 3508231; 3508232
3508631; 3508632