GF-135
Esteem 399 Low NOx Boiler
Chapter 17
OMM-0089_0A
Installation, Operation & Maintenance Manual Maint. Procedures
Page
114
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
17.17 FLAME SIGNAL INSPECTION
The flame signal can be read from the Boiler
Information screen. It should be a min. 1μ Α−DC.
•
Check the igniter for fouling or damaged insulation if a low flame signal is observed.
•
Check ground wiring and continuity as a cause for low flame signal. Replace igniter if
conditions are satisfactory.
17.18 COMBUSTION LEVELS INSPECTION
Refer to Section
12.3.4 of this manual for measuring combustion levels and burner adjustments.
17.19 FLUE GAS TEMPERATURE CHECK
Checking the Flue Gas Temperature
1. Manually place the boiler into high fire. See Section 12.3.4 for procedure.
2. Navigate to the Boiler Information Menu to observe the flue gas temperature. See Section
10-12 for procedure.
3. If the flue gas temperature is more than 54°F [30°C] above the supply water temperature,
shut the boiler down and follow the heat exchanger cleaning procedure described in the next
section.
