Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 3 - START SEQUENCE
OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 45 of 122
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!
• 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.
• 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:
• 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.
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.
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