Install Instructions

21
E. Check Pilot Burner Flame.
1. See Figure 19. The pilot burner should be lit only
if thermostat is calling for heat. The pilot burner
produces three (3) ames. The center ame should
be steady, medium hard blue enveloping 3/8 to 1/2
inch of thermocouple.
F. Check Ignition System Safety Shut-off Device.
Remove 3-wire plug from gas valve.
If burners do not shut down determine cause of
malfunction. Replace necessary items and check
operation.
G. Check Vent Damper Operation. Vent Damper must
be in open position when main burners are ignited.
H. Check High Limit Control.
Jumper Thermostat connections in boiler wiring
harness. Allow burners to operate until shutdown by
limit. REMOVE JUMPER.
I. Check Thermostat Operation. Raise and lower
temperature setting to start and stop boiler operation.
Adjust thermostat to normal setting.
J. Combustion Chamber Burn-off
1. The mineral wool combustion chamber panels
may contain a cornstarch based binder that must be
burned out at installation to prevent odors during
subsequent boiler operation.
2. Ventilate the boiler room, set the high limit to its
maximum setting, set the thermostat to call for heat.
Figure 19: Pilot Burner Flame, Honeywell Q3481B,
Models 20 through 100: Natural and LP Gas
Allow the boiler to re for at least an hour or until
the odor from the cornstarch has dissipated.
3. Return the high limit and thermostat to their desired
settings.
K. Review User's Information Manual and system
operation with owner or operator.
L. Post instructions near boiler for reference by owner
and service personnel.