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WARNING: Danger of illness, bodily injury or death.
Draft hood spillage, with unobstructed vents, indicates
that additional air must be brought into the structure
from the outside. Keep a window open (minimum
2-inches near the appliance until a permanent air duct
is installed.
EXAMPLES OF AIR INLETS AND OUTLETS
CHIMNEY OR GAS VENT
OUTLET AIR
OUTLET AIR
INLET AIR
MAX
INLET AIR
Recessed & Internal Wall Mount
Installation
Recessed wall mount installation on single sided models:
C255H, C256H, C355H, C356H.
The maximum recess depth from rear of furnace forward
is 4½-inches.
Internal Wall Mount Installation - Dual Sided Models:
C505H, C506H
NOTE:
1. The dual sided models should be installed only to an
internal wall (between two rooms) and not an outside/
external wall.
2. The placement should be such that the wall is in-between
two face panesl (ref. Figure 9B).
FIND THE STUDS AND CEILING JOINTS
Use a stud locater 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 5A, 5B. If wall
studs are not on 16-inch centers. See "CLOSE OFF STUD
SPACE." Figure 6
VENTILATED
ATTIC
12
TO
ATTIC
100 SQ
INCHES
EACH
WALL
FURN
10 CRAWL
SPACE
12
VENTILATED
CRAWL SPACE
CUT WALL OPENING
Cut wall opening 14⅜-inches wide and 66⅛-inches high
measured from the top of the floor plate. Figure 5A, 5B.
All corners must be square.
INSTALLATION OF REAR OUTLET REGISTER
(SINGLE SIDED MODELS ONLY)
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 5A.
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 5A, 5B.
CAUTION: Be careful not to damage any furnace components
while making any alternate hole.
FIGURE 5A - RECESSED WALL MOUNT INSTALLATION
B-W VENT
BASE PLATE
115.V OUTLET
PLASTER TO TOP OF HEADER PLASTER GROUND
FOR OPTIONAL
REAR REGISTER OPTIONAL FOR SINGLE
BLOWER
BURNER MODELS ONLY
TOP OF HEADER
9 1/8ʺ
BOTTOM OF HEADER NAILING
3 3/4ʺ
FLANGE
PLASTER GROUND
8 1/8ʺ X 13 1/4ʺ
NAIL
CUTOUT
FLANGE
REAR
OUTLET
REGISTER
OPENING
14 3/8ʺ
A = 4ʺ
MODELS
25,000 &
35,000
BTU/HR.
ALTERNATE
GAS STUB
LOCATION
2ʺ x 4ʺ
PLATE
FIGURE 5B - CUT WALL OPENING
HEADER ASSEMBLY
66 1/8ʺ
(1679mm)
WALL OPENING
A = 2 5/8ʺ
MODELS
50,000
BTU/HR.
66 1/8ʺ
2 X 4
FLOOR
PLATE
14 3/8ʺ
(368mm)
GAS STUB
LOCATION
2ʺ x 4ʺ STUDS
TOP OF
HEATER
14 3/8ʺ
GAS STUB
LOCATION
FINISHED
FLOOR
11
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