Williams 2503531 - Manual (Page 5)

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OWNER’S MANUAL
CREATING WALL OPENING
AND MOUNTING FURNACE
Remove furnace front cover. Remove the
two screws at the lower edges of front cover.
Lift front cover away.
Installing in Normal Frame Wall
The 25,000 BTU/Hr model is designed to fit
between two wall studs set at 16 inch on
center. The 40,000 BTU/Hr model will not
fit between wall studs. Follow the steps
below to install.
1. Turn off electrical circuits that pass
through mounting wall. Make sure
there are no pipes or electrical wires in
area you intend to cut.
2. Use stud locator or small finishing nail
to find wall studs. When you locate
studs, drive a small finishing nail into
each stud. This provides a visual refer-
ence for stud locations.
3. 25,000 BTU/Hr Model: Cut an open-
ing in wall between the two studs. Make
opening 14
1 /
4
" wide by 13 5 /
8
" high
(see Figure 2). IMPORTANT: You
must install furnace horizontally. Do
not install furnace vertically.
40,000 BTU/Hr Model: Cut a 20 5 /
16
"
wide by 14 3 /
8
" high opening in wall (see
Figure 2). Start your cut right next to
stud you are going to anchor cabinet to.
Cut across wall and through the next
stud. Stop cut at proper width.
IMPORTANT: You must install furnace
horizontally. Do not install furnace ver-
tically.
4. 25,000 BTU/Hr Model: Mark screw
locations on wall (see Figure 2). Make
sure screws will anchor into studs.
Make sure screw locations match screw
holes on cabinet flange.
40,000 BTU/Hr Model: Mark screw
locations on wall (see Figure 2). Make
sure screws on one side will anchor into
studs. Screws on other side will only
anchor in wall material. Make sure
screw locations match screw holes on
INSTALLATION
(Continued)
Figure 2 - Wall Openings and Screw
Locations
Wall Studs
Wall
Opening
14 1 /
4
"
13
5 /
8 "
Approx.
Screw
Locations
Wall Studs
20 5 /
16
"
14
3 /
8 "
Wall Opening
Approx.
Screw
Locations
25,000 BTU/Hr Model
cabinet flange.
5. 25,000 BTU/Hr Model: Use a proper-
sized drill bit. Drill holes through wall
and into studs at marked locations.
40,000 BTU/Hr Model: Use a proper-
sized drill bit. On wall stud side of
opening, drill holes through wall and
into studs at marked locations. On other
side, drill holes through wall material.
6. Insert furnace into opening. Do this
from inside the room. Secure furnace
to wall with four large screws provided.
7. On outside of wall, caulk opening be-
tween the cabinet and the rough edges
of opening.
40,000 BTU/Hr Model
Approx.
Screw
Locations
Installing in Masonry Wall
You can mount both models in a masonry
wall. Follow the steps below to install.
1. Cut opening in wall. Make opening 14 1 /
4
"
wide by 13 5 /
8
" high for 25,000 BTU/Hr
models. Make opening 20 5 /
16
" wide by
14 3 /
8
" high for 40,000 BTU/Hr mod-
els. IMPORTANT: You must install
furnace horizontally. Do not install fur-
nace vertically.
INSTALLING THERMOSTAT
Mount the thermostat directly on the fur-
nace or on a wall in another part of the room.
If you have solid or masonry walls, mount
the thermostat on the furnace.
Mounting Thermostat to Furnace
1. Unplug furnace.
2. Locate red and white thermostat wires
coming out of side of furnace. These
wires are labeled “Thermostat.”
3. Cut thermostat wires to desired length.
4. Route thermostat wires through slot/
hole in side of thermostat mounting
plate. Then route wires through 5/8"
diameter hole in center of plate (see
Figure 4, page 6).
5. Connect thermostat wires to the two
terminal screws on back of thermostat
(see Figure 3). Connect red wire to “R”
terminal. Connect white wire to “W”
terminal.
WARNING: Unplug furnace
before installing thermostat.
2. Secure furnace to wall with toggle bolts
or hook bolts set in mortar.
3. Insert furnace into opening. Do this
from inside the room. Secure furnace
to wall with toggle bolts or hook bolts.
4. On outside of wall, caulk opening be-
tween the cabinet and the rough edges
of opening. You can also use mortar to
seal opening.
Figure 3 - Connecting Thermostat Wires
to Thermostat
Continued
W
R
Red Wire
White Wire