Installation Guide

19
Figure 15: Main Burner Flame
Figure 16: Pilot Burner Flame
CAUTION
Avoid operating this boiler in an environment
where saw dust, loose insulation bers, dry wall
dust, etc. are present. If boiler is operated under
these conditions, the burner interior and ports
must be cleaned and inspected daily to insure
proper operation.
6. Natural Gas Input:
Adjust Regulator on Gas Valve so that manifold
pressure is 3½ inches water column. Turning
Regulator Adjusting Screw Clockwise increases
pressure. Counter-clockwise rotation decreases
pressure.
D. Check Main Burner Flame. See Figure 15. Flame
should have a clearly dened inner cone with no yellow
tipping. Orange-yellow streaks caused by dust should
not be confused with true yellow tipping.
E. Check Pilot Burner Flame.
1. See Figure 16. 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 sensing probe.
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 operating.
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.
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.