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Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 5 – SAFETY DEVICE TESTING
LOW Gas Pressure Test Instructions: BMK 750 – 2500
MANUAL SHUT-OFF
HIGH GAS PRESSURE
SWITCH
SSOV
1/4" NPT PLUG
Install manometer
here for LOW gas
pressure fault test
Figure 5-1a: BMK 750/1000 LOW Gas Pressure Test Components
MANUAL
SHUT-OFF
VALVE
Install manometer here for LOW gas pressure fault test.
Figure 5-1b: BMK 1500/2000 LOW Gas Pressure Test Components
OMM-0121_D • GF-205 • 5/9/2019
TO AIR/FUEL
VALVE
VALVE
LOW GAS PRESSURE SWITCH
LOW GAS PRESSURE
LEAK DETECTION BALL VALVE
(shown closed)
TO
AIR/FUEL
VALVE
HIGH GAS
PRESSURE
SWITCH
LOW GAS BALL VALVE
1/4" NPT PLUG
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
GAS INLET
NATURAL
GAS INLET
SSOV
LOW GAS
PRESSURE
SWITCH
Page 79 of 122
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