Full Product Manual

Installing Your Furnace
10
Recessed Wall Mount Installation
On models 2509621A, 2519621A, 2539621A, 2559621A,
2509622A, 2519622A, 2539622A, 2559622A, 3509621A,
3519621A, 3539621A, 3559621A, 3509622A, 3519622A,
3539622A, and 3559622A, the maximum recess depth from rear
of furnace forward is 4½-inches.
FIND THE STUDS AND CEILING JOINTS
Use a stud locator or small finishing nails. Repeatedly drive and
remove a nail into the wall in the area of the stud until it is located.
Then find the inside edge of the stud. Leave the nail at this
location.
The other stud should be about 14½-inches from the one found.
Drive finishing nails on the inside of this stud. Draw wall cutout to
required size as shown in Figure 5. If wall studs are not on
16-inch centers. See "CLOSE OFF STUD SPACE.” (Figure 6).
CUT WALL OPENING
Cut wall opening 14⅜-inches wide and 66⅛-inches high
measured from the top of the floor plate. (Figure 5). All corners
must be square.
INSTALLATION OF REAR OUTLET REGISTER
The optional rear outlet register may be installed when the
furnace is recessed into the wall. In new construction, install the
rear outlet plaster ground at the same time you install the header
plate. For existing construction, make the necessary cutout and
install the plaster ground before you install the furnace. See
instructions packed with accessory and Figure 5.
Do not allow wall finish material to project into the furnace recess.
Do not install rear outlet register where grille may be blocked by a
door, curtains or any other obstruction.
GAS SUPPLY OPENING
A hole must be drilled for the gas line. Decide whether the gas
line will come through the floor or wall. Drill a 1½-inch hole
through the floor or wall as needed. (Figure 5).
CAUTION: Be careful not to damage any furnace
components while making any alternate hole.
FIGURE 5
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Recessed Wall Mount Installation