Watts AERCO Benchmark BMK750 Operation And Service Manual page 52

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 4 – INITIAL START-UP
1/4" NPT PLUG
(Install manometer here
for downstream
combustion calibration
reading)
LEAK DETECTION
BALL VALVE
MANUAL SHUT-
OFF VALVE
Figure 4-1c: BMK2500 1/4 Inch Gas Plug Location – BMK2500 (P/N 22318 shown)
TO
AIR/FUEL
VALVE
MANUAL
SHUT-OFF VALVE
PRESSURE WITCH
LEAK DETECTION
(Install manometer here for downstream
combustion calibration reading)
Figure 4-1d: 1/4 Inch Gas Plug Location – BMK3000 (P/N 22310 shown)
OMM-0145_A99 • GF-218 •
HIGH GAS PRESSURE
SWITCH
HIGH GAS
BALL VALVE
1/4" NPT PLUG
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019
TO
AIR/FUEL
VALVE
1/4" NPT PLUG
(Install manometer here for upstream
combustion calibration reading)
NATURAL GAS INLET
SSOV
LOW GAS
PRESSURE SWITCH
LEAK DETECTION
BALL VALVE
1/4" NPT PLUG
(Install manometer here
for upstream combustion
calibration reading)
NATURAL
GAS INLET
SSOV
LOW GAS
PRESSURE
SWITCH
LEAK DETECTION
BALL VALVE
Page 52 of 157