Benchmark 750-3000 Installation & Startup Manual
SECTION 3 - START SEQUENCE
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5/9/2019
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SECTION 3:
START SEQUENCE
3.1 INTRODUCTION
The information in this Section provides a guide to starting the Benchmark Boiler using the C-
More Controller mounted on the front of the unit. It is imperative that the initial startup of this
unit be performed by factory trained personnel. Operation prior to initial startup by factory
trained personnel may void the equipment warranty. In addition, the following WARNINGS and
CAUTIONS must be observed at all times.
WARNING!
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Electrical voltages in this system include
120 VAC (BMK 750
– 20000) or 208 or 460
VAC (BMK 2500/3000) and 24 volts AC
. It must be serviced only by factory certified
service technicians.
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Do not attempt to dry fire the unit
. Starting the unit without a full water level can
seriously damage the unit and may result in injury to personnel or property damage. This
situation will void any warranty.
CAUTION!
All of the installation procedures in Section 2 must be completed before attempting to start
the unit.
3.2 START SEQUENCE
When the C-more Controller ON/OFF switch is set to the
ON
position, it checks all pre-purge
safety switches to ensure they are closed. These switches include:
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Safety Shut-Off Valve (SSOV) Proof of Closure (POC) switch
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Low Water Level switch
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High Water Temperature switch
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High Gas Pressure switch
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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.
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
