Williams 4003532 - Manual (Page 7)

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OWNER’S MANUAL
10. Feed thermostat wires from attic to
furnace through 1/2" hole in ceiling
wall plate.
11. Connect thermostat wires from attic to
thermostat wires on furnace. Connect
red wires together, then connect white
wires together. Use wire nuts to make
connections.
IMPORTANT: Make sure
thermostat wires do not touch combus-
tion chamber.
INSTALLATION
(Continued)
Mounting the Thermostat to Wall
1. Connect thermostat wires to the two
terminal screws on back of thermostat
(see Figure 6). Connect red wire to “R”
terminal. Connect white wire to “W”
terminal.
2. Push any excess wire back through hole
in wall and plug hole with insulation
to prevent drafts. Drafts affect the ther-
mostat operation.
3. Use thermostat base to mark mounting
screw locations.
4. Drill proper-sized holes for wall anchors.
5. Attach thermostat to wall using screws
provided (see Figure 7).
W
R
Red Wire
White Wire
Figure 7 - Mounting Thermostat to Wall
.2
.3
.4
.5 .7 1. 0
SOLID STATE IGNITION
50 60 70 80 90
50 60 70 80 90
OFF
Figure 6 - Connecting Thermostat Wires
to Thermostat
Wall
Anchors
CAUTION: Use only new,
black iron or steel pipe. Copper
tubing may be acceptable in cer-
tain areas. Check local codes.
Use pipe large enough in diam-
eter to allow proper gas volume
to furnace. If pipe is too small,
undue loss of pressure will oc-
cur. Refer to chart on page 9.
WARNING: Unplug furnace
before connecting to gas supply.
WARNING: Never connect
furnace to private (non-utility) gas
wells. This gas is commonly
known as wellhead gas.
WARNING: A qualified ser-
vice person must connect fur-
nace to gas supply. Follow all
local codes.
CAUTION: Lightly apply pipe
joint sealant to male threads be-
fore connecting. Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
CONNECTING TO GAS
SUPPLY
All piping must comply with local codes
and ordinances or with the National Fuel
Gas Code (ANS Z223.1 NFPA No. 54),
whichever applies.
You can connect furnace to gas supply at
front of furnace (inside) or at rear of furnace
(outside).
Connecting Furnace to Gas
Supply at Front of Furnace
1. Locate gas inlet pipe on lower, right
front of furnace (see Figure 8).
2. Connect 3/8" NPT pipe or nipple to gas
inlet pipe (see Figure 8). See Provid-
ing Gas Piping to Furnace, pages 9 and
10, for correct gas pipe installation.
Continued
Gas Inlet Pipe
Figure 8 - Connecting Gas from Inside of
Room
3/8" NPT
Pipe or
Nipple