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EGH-105 to EGH-125 EGH-105 to EGH-125
EGH-105 to EGH-125 EGH-105 to EGH-125
EGH-105 to EGH-125 Control Supplement
Part Number 550-110-677/0299
24
Check-out procedure — operationVIII
Always follow boiler Operating instructions, Figure 11, when starting the
boiler. Failure to do so could result in severe personal injury, death or substantial
property damage.
1. Increase setting of room thermostat (or operating control) to call for heat.
2. Vent damper (if provided) will slowly open. When damper is fully open, the ignition
control will open pilot gas valve and start spark.
Vent damper must be in open position when appliance main burners are
operating. If damper is not in open position, flue products will spill into the
building, causing severe personal injury or death.
3. If pilot lights and proves within 15 seconds, the ignition control turns off the spark and
opens the main gas valve (dual valves in single body). Main burners ignite.
If pilot does not light and prove within 15 seconds, the ignition control shuts
off pilot gas and spark and waits 5 minutes. It then will retry. If the second
ignition attempt fails, the ignition control will lockout and close the alarm
contact of the impulse relay.
4. During main burner operation:
• The ignition control monitors pilot flame current. If signal is lost, main valve is closed,
spark is activated, and the operating sequence returns to step 3.
• If power is interrupted, the control system shuts off pilot and main gas valves and
restarts at Step 1 when power is restored.
5. Stop the call for heat (lower thermostat or operating control).
• Pilot and main gas valves will close.
• Damper (if provided) will close.
6. Boiler is now in the off cycle.
7. Repeat steps 1 through 6 several times to verify operation.
8. Return thermostat or operating control to normal setting.