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Benchmark 1.5ln low nox boiler, Gf-120 – AERCO BMK 1.5 LN July 2011 User Manual

Page 40

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CHAPTER 3: CONTROL PANEL OPERATION

Page

40 of 152 PR2: 05/09/12

Benchmark 1.5LN Low NOx Boiler

Operation and Maintenance Manual

OMM-0041_0D

GF-120

AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288

100

DETAIL “A”

TO BLOWER

AIR IN

DIAL

(DETAIL “A”)

STEPPER

MOTOR

Figure 3-4: Air/Fuel Valve In Purge Position

AIR/FUEL

VALVE OUTLET

TO BLOWER

BLOWER

PROOF

SWITCH

Figure 3-5: Blower Proof Switch