Williams 4505622A Owner's Manual page 11

Installing Your Furnace
FIGURE 7
FIGURE 8 Thermostat Connections
P323177 (NAT. GAS)
P323178 (L.P. GAS)
WILLIAMS PART NO.
P323177 OR P323178
19. Turn on the gas and check all gas fittings for leaks with a
soapy water solution or a liquid leak detection solution. DO
NOT USE A FLAME TO CHECK FOR LEAKS.
WARNING: The use of a flame for leak detection
can cause a dangerous explosion.
20. Refer to the "Lighting and Operation" section of this manual.
Carefully read the safety information, and then light the pilot
and the main burner according to the instructions. Allow the
main burner to burn for five minutes, see Page 12, Figure 11
for typical burner flame pattern.
21. Check the vent or chimney performance by holding a match
near the edge of the draft hood as shown in Page 12, Figure
12. If the flame is not pulled into the draft hood, the chimney
is not providing sufficient draft. This can allow hazardous
gases to escape the vent system. Find and correct the causes
of this malfunction.
22. Replace the grille on top of the furnace. The small clip
attached to the chain at the limit switch box should be hung
over a section of the grille so it can be used to override the
limit switch as described in the "Operating the Furnace"
section of this manual. Explain the operation of the furnace to
the homeowner and give these instructions to the homeowner.
WARNING: THIS IS A
SELF-CONTAINED
MILLIVOLT SYSTEM.
DO NOT CONNECT
TO LINE VOLTAGE.
For Models 4505621A & 4505622A:
Part Number P323674
For Models 6005621A & 6005622A:
Part Number P323673