Mount Installation - Williams 3144030 Owner's Manual

Recessed Mount Installation (Con't)
NOTE
Flexible conduit may be used only if approved by your local
codes and ordinances. If you have any doubt, consult your
local Electrical or Building Inspector.
5. The electrical supply wires, ground wire and the
thermostat wires may now be routed to the furnace
location. See sections THERMOSTAT INSTALLATION
pages 8 and 9, and ELECTRICAL WIRING page 11.
6. Be sure to leave enough excess wire at the furnace to
make the connections inside the furnace junction box.
7. if it is more convenient for you to do so, you may pull
the wiring to the furnace after it is mounted.
CLOSE OFF STUD SPACE (If Required)
If studs are not on 16 inch centers, cut the hole for the
furnace next to an existing stud and frame in the other side
using a 2x4 and spacer blocks as required. See Fig. 5.
If the distance from the top of the cutout to the ceiling wall
plate is more than 18 inches it is recommended that it be
closed off.
Nail a 2x4 long enough to go between the studs at the
top of the opening to close off the stud space.
PLATE I
,/
2 X
4"
BACKING-'/[
IF MOR_"n-IAN
18" BETWEEN
TOP OF CUTOUT
& C_UNG PLATE
E_S_NG s'nJo -_
CLOSE OFF STUD SPACE
_- 14-3/8"-"
Ill
NEWS'_D
II
11
_-'_ SPACER
III CLOCKS
III ASRCO'O
III
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STUD
Surface Mount Installation
BEFORE YOU BEGIN: To avoid electrical shock turn off
electrical circuits that pass through the wall where you are
going to install the furnace.
If you intend to use the optional rear outlet, turn to page
10 for rear outlet installation procedure before you begin
to install the furnace. Use only the optional grille and boot
extension supplied by the manufacturer.
FIND THE STUDS
1. Find two studs at spot where furnace is to be placed.
Use a stud Iocator 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.
2. Inside edge of the other stud should be about 141/2in-
ches from the one found. Drive finishing nail on inside
edge of this stud.
CUT WALL OPENING
If you intend to use the OPTIONAL REAR OUTLET, cut
the 81/4 inch by 121/4 inch opening ONLY as shown in
Fig. 3, page 6. Also see OPTIONAL REAR OUTLET IN-
STALLATION on page 10.
ELECTRICAL SUPPLY ROUGH-IN
1.
If unpractical to route the wiring to the furnace from
the attic, you may make entry holes through either wall
stud above the furnace and route the conduit and
wiring from an adjoining stud space, crawl space or
basement.
2,
To properly route the conduit, electrical power supply
wires and thermostat wires to the furnace top, you must
also make entry holes in the wall board above the fur-
nace location.
3. The electrical supply openings should be located at 2
inches above furnace top to match openings shown in
Fig. 4, page 6.
4. At selected locations, drill a 1 inch hole for the elec-
trical supply wiring and a 1/2inch hole for the thermostat
wires.
5. Route the flexible conduit to the 1 inch hole in the
wallboard and allow it to extend at least 1 inch below
the furnace top (711/2inches from the finished floor).
See Fig. 3, page 6.
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