Williams 3501522A Owner's Manual page 30

ISSUE
8. Abnormal operation.
9. Noisy blower.
10. Blower does not run.
30
VENTED ROOM HEATERS
POSSIBLE CAUSE(S)
D. Incorrect vent pipe.
E. Loose connections on the
vent safety wiring harness.
A. Delayed ignition - pilot
flame may be too low.
B. Expansion noise, ticking.
C. Combustible gas spillage.
D. Excessive flame roll-out.
E. Burner is over-fired.
F. Yellow burner flame.
G. Yellow pilot flame.
A. Housing rattling.
B. Blower dirty.
C. Blower wheel bent.
A. Fan switch not set.
B. Check bearings.
CORRECTIVE ACTION
the draft hood as possible to allow venting to begin before any restriction is
encountered. The use of too many offsets may also prevent proper venting.
Use listed B/W type vent pipe. DO NOT use transite or any other type of
ceramic pipe for venting. DO NOT use single wall pipe. When venting into
a masonry chimney, the chimney must be properly lined and sized for this
gas heater. The use of type "B" or flexible chimney liner is recommended.
Check the connection on both the switch and the gas valve. Tighten if
necessary.
Adjust pilot flame. Refer to "How to Care for Your Heater" section in this
manual.
Heater may be distorted by being vented through an uneven opening. A
restricted vent may create expansion noise. Refer to "Venting" section of
this manual.
Check vent system for a blocked flue, excessive down draft (wind) or
negative pressure in room caused by ventilating fan or a fire in a fireplace.
Heater is possibly overrated - check for high gas pressure at gas valve (see 4B).
Check the manifold gas pressure. Check the rate, this appliance is
manufactured for elevations up to 2,000 feet. It must be derated for
operation above 2,000 feet.
Check burner for obstructions. Install new burner and pilot orifices.
Remove pilot orifice, check and clean.
Tighten blower screws.
Clean blower wheel.
Straighten or replace.
Select fan speed.
Add oil as outlined in "Blower Accessory Instructions".