Aerco Benchmark BMK 750 User Manual page 107

Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX G – BENCHMARK 1500/2000 PART LISTS
The Benchmark 1500/2000 gas train (P/N 22240
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
4
Benchmark 1500/2000
Gas Train P/N 22240
See full part lists below
63
Benchmark 1500/2000 Part List
Benchmark 1500 29313-TAB rev G
Benchmark 2000 29337-TAB rev G
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
) contain a Valve Proving device (P/N 24629-2):
YELLOW RUN LIGHT
1. OFF during normal
operation
2. ON during valve proving
operation
3. ON when unit is not
running
RED ALARM LIGHT &
RESET SWITCH
1. OFF during normal
operation
2. ON indicates a leak or
Actuator failure
10/02/2017
Sheet 5 of 7
Page 107 of 146
11/29/2017