Wiring Diagrams; Replacement Parts; Service Hints; Technical Service - Williams 2503531 Owner's Operation And Installation Manual

WIRING DIAGRAMS

Thermostat
Red White
Junction
Box
Black Black
Terminal Block
Green
White
White
Black
Transformer
370 V.A.C.
Capacitor
White
Brown
Brown
Brown
White
Motor
Green
Figure 20 - Wiring Diagram (25,000 BTU/Hr Model)
Thermostat
White White
Junction
Box
Black Black
Terminal Block
Green
White White
Red
Transformer
White
White
Brown
White
Motor
Green
Figure 21 - Wiring Diagram (40,000 BTU/Hr Model)
201843
Limit
Switch
Red Black
Time Delay
Relay
Black
Orange
Blue
Yellow
Brown
5 MFD
Gas Valve
Yellow
White
Black
Note:
Limit
Switch
Red Black
Time Delay
Relay
Black
Blue
Brown
Black
Brown
370 V.A.C.
Capacitor
5 MFD
Gas Valve
Brown
White
Brown
Black
Note:
OWNER'S MANUAL
Sail Switch
1
Green
2
Ignition
Control
Brown
3
Board
Yellow
4
5 (Open)
6
7
Black
White
Probe
Black
White
White
Glo-Bar
Sail Switch
1
Green
2
Ignition
Control
Brown
3
Board
Yellow
4
5
(Open)
Orange
6
7
Black
White
Probe
Black
White
White
Glo-Bar
19
REPLACEMENT
PARTS
Note: Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
All parts listed herein may be ordered from
your equipment supplier.
When ordering repair parts, always give the
following information:
• model number of your furnace
• type of gas, natural or propane/LP
• the replacement part number and de-
scription

SERVICE HINTS

When Gas Pressure Is Too Low
• glo-bar glows, but burner will not ignite
When Gas Quality Is Bad
• burner will not stay lit
• burner will produce flames and soot
You may feel your gas pressure is too low or
gas quality is bad. If so, contact your local
gas supplier.
TECHNICAL
SERVICE
You may have further questions about in-
stallation, operation, or troubleshooting. If
so, contact your installer, a qualified service
person, or Williams Technical Help Line at
1-800-266-0993.