Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX G – BENCHMARK 1500/2000 PART LISTS
OMM-0128_0A
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
109
of
144
GF-206-K
Ph.: 800-526-0288
07/17/2017
The Benchmark 1500 gas train (P/N
22240
)
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.
PARTIAL FRONT VIEW
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
AERCO
International, Inc.
Blauvelt, NY 10913
Benchmark 1500/2000 Part List
01/03/2017
29313-TAB rev E, 29337-TAB rev E
Sheet 7 of 7
