U.S. Boiler Company INDEPENDENCE, Installation, Operating And Service Instructions

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Figure 43: Typical Pilot Flame, Honeywell Q3481B
Figure 42: Pilot Burner Flame, Honeywell Q327
Figure 44: 40mm Main Burner Flame
Figure 45: 1" Main Burner Flame
IX. System Start-up (continued)
G.
Check thermostat operation. Raise and lower
temperature setting to start and stop boiler operation.
H.
Check ignition system shutoff. Gas valve should close
and pilot and main burners extinguish.
1. Continuous Ignition (Standing Pilot): disconnect
thermocouple from gas valve.
2. Electronic Ignition (EI): disconnect igniter/sensor
cable from ignition module terminal "9".
I.
Check low water cutoff (steam only).
1. Adjust thermostat to highest setting.
2. With boiler operating, open drain and slowly drain
boiler.
CAUTION
Do not drain below gauge glass.
3. Main burners will extinguish when water level drops
below low water cutoff. Water should still be visible
in gauge glass. Verify limit, thermostat or other
controls have not shut off boiler.
4. Adjust thermostat to lowest setting. Refill boiler to
normal water line.
J.
Check Limit.
1. Adjust thermostat to highest setting.
2. Observe pressure gauge. When pressure is indicated,
adjust limit to setting below observed pressure.
Main burners should extinguish.
WARNING
Failure to properly adjust gas input rate will
result in over firing or under firing of the boiler.
Improper and unsafe boiler operation may result.