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yellow orange glow of the hot surface igniter can be observed through the
observation port in the front boiler section just above the igniter.
After igniter warm-up, the gas valve is energized, and opens on the normal firing
rate regulator (2.5" w.c.) for a 6 second trial for ignition. Lamp D illuminates.
The blue orange glow of the burner can be seen through the observation port.
Two seconds later, Lamp C goes out as power is turned off to the hot surface
igniter. During the last two seconds of the 6 second trial for ignition, main burner
flame is proven by flame rectification through the hot surface igniter, providing a
flame signal to the integrated boiler control. The gas valve remains energized, and
the boiler runs.
Thermostat ends call for heat, de-energizing gas valve and system circulator.
Burner stops firing, and Lamp D goes out. Draft inducer remains powered. Lamp B
illuminates, indicating draft inducer is running for 30 second postpurge.
After 30 seconds, draft inducer is de-energized. Lamp B goes out. Boiler stands by
for next call for heat.
C.O
D.O
E. O
A. •
B. O
C. •
D. •
E. •
A. •
B. O
C, O
D, •
E. •
A, •
B. •
C. O
D, O
E. O
A. •
B. O
C, O
D. O
E. O
NOTE: First couple of cold starts may be rough due to gas line not being completely purged of
air, causing low firing rate and high excess air levels.
B. INSPECT VENTING AND AIR INTAKE SYSTEM
Operate the boiler and verify that all vent/air intake connections are gastight and watertight.
Repair any leaks immediately.
C. INSPECT CONDENSATE DRAIN
Verify that all connections are watertight, and that condensate flows freely. Repair any leaks
immediately.
D. INSPECT SYSTEM PIPING
Verify that all connections are watertight. Repair any leaks immediately.
E. TEST IGNITION SYSTEM SAFETY SHUTOFF DEVICE
1. Turn off manual gas valve
2. Set thermostat to call for heat
3. Boiler begins normal sequence of operation
4. After approximately 40 seconds (pre purge and igniter warm-up period), lamp D illuminates,
indicating gas valve is powered
5. After 6 seconds, gas valve closes, lamp D goes out as integrated boiler control senses that
flame is not present
6. To restart system, follow operating instructions under "START-UP PLACE IN
OPERATION"
38
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