Aerco Benchmark BMK 750 User Manual page 117

Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX H – BENCHMARK 2500/3000 PART LIST
The Benchmark 2500 and 3000 gas trains (P/N 22244 and 22215) contain a Valve Proving
device (P/N 24629-2). This device monitors the gas pressure on both sides of the Actuator. If
the pressure difference falls below a fixed value, indicating the failure of the Actuator or leakage
in the gas line, it triggers the shutdown of the boiler.
Once the problem has been diagnosed and corrected, the Valve Proving device must be reset
by pressing the red Reset switch before the unit is restarted.
AERCO
International, Inc.
Blauvelt, NY 10913
OMM-0128_0C
GF-206-K
Benchmark 2500/3000 Part List
Benchmark 2500 28536-TAB rev E
Benchmark 3000 28382-TAB rev F
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
YELLOW RUN LIGHT
• OFF during normal
operation
• ON during valve proving
operation
• ON when unit is not
running
RED ALARM LIGHT &
RESET SWITCH
• OFF during normal
operation
• ON indicates a leak or
Actuator failure
10/09/2017
Sheet 5 of 8
Page 117 of 146
11/29/2017