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Figure 27: Typical Pilot Flame, Honeywell Q348A
The pilot produces a single ame. The ame should
be steady, medium hard blue enveloping 3/8 to a 1/2
inch of thermocouple.
B. Continuous Ignition (Standing Pilot)
Natural gas Models 207 with 40mm (1-9/16")
diameter burners and 208 through 210.
See Figure 26.
LP gas Models 203 through 210. See Figure 26.
The pilot produces three (3) ames. The center
ame should be steady, medium hard blue
enveloping 3/8 to a 1/2 inch of thermocouple.
Figure 25: Typical Pilot Flame, Honeywell Q350
Figure 26: Typical Pilot Flame, Honeywell Q327
C. Electronic Ignition (EI), see Figure 27.
The pilot produces three (3) ames. The center
ame should be steady, medium hard blue
enveloping 3/8 to a ½ inch of sensing probe.
7. CHECK THERMOSTAT OPERATION. Raise and
lower temperature setting as required to start and stop
burners.
8. CHECK HIGH LIMIT CONTROL. Jumper
Thermostat Terminals or Thermostat connections in
Limit Control. Allow burners to operate until shutdown
by limit. REMOVE JUMPER.
9. CHECK DAMPER OPERATION. Vent Damper must
be open when boiler is running. Le registre doit être
ouvert lorsque le brûleur principal de l’appareil
fonctionne. Start boiler, refer to instructions on damper
to determine if damper is in the full open position.
10. CHECK IGNITION SYSTEM SAFETY SHUT-OFF
DEVICE.
A. 24 volt-loosen thermocouple at gas valve.
B. Electronic Ignition - Remove pilot lead wires from
gas valve.
If burners do not shut down determine cause of
malfunction. Replace necessary items and check
operation.
11. COMBUSTION CHAMBER BURN-OFF
A. 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.
B. 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.
C. Return the high limit and thermostat to their desired
settings.