Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 4 – INITIAL START-UP
OMM-0121_D • GF-205 • 5/9/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 59 of 122
Figure 4-1b: BMK 1500 & 2000 1/4 Inch Gas Plug Location
Figure 4-1c: BMK 2500 1/4 Inch Gas Plug Location
NATURAL GAS INLET
SSOV
AIR/FUEL
LEAK DETECTION BALL VALVE
1/4” NPT PLUG
(Install manometer here for
Combustion Calibration)
HIGH GAS
PRESSURE
SWITCH
LOW GAS
PRESSURE
SWITCH
MANUAL
SHUT-OFF
VALVE
SSOV
TO
AIR/FUEL
VALVE
LEAK
DETECTION
BALL VALVE
1/4” NPT PLUG
(Install manometer
here for Combustion
Calibration)
HIGH GAS PRESSURE
SWITCH
LOW GAS
PRESSURE
SWITCH
MANUAL
SHUT-OFF
VALVE
NATURAL GAS INLET
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