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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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