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Benchmark 1.5ln low nox boiler, Gf-120 – AERCO BMK 1.5 LN October 2012 User Manual

Page 44

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CHAPTER 3
OPERATION

Page 44 of 166 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 PR1:10/18/12

Benchmark 1.5LN Low NOx Boiler

Installation, Operation and Maintenance Manual

GF-120

OMM-0041 0E

AIR/FUEL
VALVE OUTLET
TO BLOWER

BLOWER
PROOF
SWITCH

Figure 3-5: Blower Proof Switch

25

TO BLOWER

AIR IN

DIAL
(DETAIL “A”)

STEPPER

MOTOR

DETAIL “A”

Figure 3-6: Air/Fuel Valve In Ignition Position

Up to 7 seconds will be allowed for ignition to be detected. The igniter relay will be

6.

turned off one second after flame is detected.