Watts AERCO Benchmark OMM-0136 - Page 36

Benchmark Platinum-Edge [II]: Operation-Service Manual
SECTION 4 – INITIAL START-UP
OMM-0137_E • GF-211 • 12/13/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 36 of 153
Figure 4-1c: BMK2500 1/4 Inch Gas Plug Location – BMK2500 (P/N 22318 shown)
Figure 4-1d: 1/4 Inch Gas Plug Location – BMK3000 (P/N 22310 shown)
SSOV
TO
AIR/FUEL
VALVE
LEAK DETECTION
BALL VALVE
1/4” NPT PLUG
(Install manometer here
for downstream
combustion calibration
reading)
HIGH GAS PRESSURE
SWITCH
LOW GAS
PRESSURE SWITCH
MANUAL SHUT-
OFF VALVE
NATURAL GAS INLET
NATURAL
GAS INLET
TO
AIR/FUEL
VALVE
LEAK DETECTION
BALL VALVE
1/4” NPT PLUG
(Install manometer here for upstream
combustion calibration reading)
HIGH GAS
PRESSURE WITCH
LOW GAS
PRESSURE
SWITCH
MANUAL
SHUT-OFF VALVE
SSOV
1/4” NPT PLUG
(Install manometer here
for upstream combustion
calibration reading)
LEAK DETECTION
BALL VALVE
1/4” NPT PLUG
(Install manometer here for downstream
combustion calibration reading)
LEAK DETECTION
BALL VALVE