Watts AERCO Benchmark OMM-0136 - Page 57

Benchmark Platinum-Edge [II]: Operation-Service Manual
SECTION 5 – SAFETY DEVICE TESTING
OMM-0137_E • GF-211 • 12/13/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 57 of 153
Figure 5-1a: BMK750/1000 LOW Gas Pressure Test Components
Figure 5-1b: BMK1500/2000 LOW Gas Pressure Test Components
SSOV
GAS INLET
TO AIR/FUEL
VALVE
LOW GAS PRESSURE
LEAK DETECTION BALL VALVE
(shown closed)
HIGH GAS PRESSURE
SWITCH
LOW GAS PRESSURE SWITCH
MANUAL SHUT-OFF
VALVE
1/4” NPT PLUG
Install manometer
here for LOW gas
pressure fault test.
NATURAL
GAS INLET
SSOV
HIGH GAS
PRESSURE
SWITCH
LOW GAS
PRESSURE
SWITCH
MANUAL
SHUT-OFF
VALVE
1/4” NPT PLUG
Install manometer here for LOW gas pressure fault test.
LOW GAS BALL VALVE
TO
AIR/FUEL
VALVE
(P/N 22322 shown)
(P/N 22314 shown)