Benchmark 750-3000 Boiler Operation, Service, Maintenance Guide - KOREA
APPENDIX H – BENCHMARK 2500/3000 PART LISTS
OMM-0128_0A
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
119
of
144
GF-206-K
Ph.: 800-526-0288
07/17/2017
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.
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 2500/3000 Part List
12/15/2016
28536-TAB rev C, 28382-TAB rev D
Sheet 7 of 7
