Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
CHAPTER 3 – OPERATION
OMM-0119_0A
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
49
of
170
GF-130-I
Ph.: 800-526-0288
11/03
/2016
3.10 START SEQUENCE
When the Control Box ON/OFF switch is set to the
ON
position, it checks all pre-purge safety
switches to ensure they are closed. These switches include:
•
Safety Shut-Off Valve (SSOV) Proof of Closure (POC) switch
•
Low Water Level switch
•
High Water Temperature switch
•
High Gas Pressure switch
•
Low Gas Pressure switch
NOTE
The
Blocked Inlet
and downstream
Blower Proof
switches are
not
checked prior to starting the pre-purge.
If all of the above switches are closed, the READY light above the ON/OFF switch will light and
the unit will be in the STANDBY mode.
When there is a demand for heat, the following events will occur:
NOTE
If any of the Pre-Purge safety device switches are open, the
appropriate fault message will be displayed. Also, the appropriate
messages will be displayed throughout the start sequence, if the
required conditions are not observed.
