Watts AERCO Benchmark BMK5000 - Page 53

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 4 – INITIAL START-UP
OMM-0145_D • GF-218 • 11/2/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 53 of 213
Figure 4-1e: Port Location for Combustion Calibration – BMK4000
Gas Supply Manometer Installation Instructions BMK5000 - 6000
1. Turn off the main gas supply upstream of the unit.
2. Remove the front panel from the boiler to access the gas train.
3. Connect the manometer directly to the Low and High Gas Pressure Switches, as shown in
Figure 4-1f.
HIGH GAS
PRESSURE
SWITCH
NATURAL
GAS INLET
TO AIR/FUEL
VALVE
MANUAL SHUT-
OFF VALVE
LOW GAS
PRESSURE
SWITCH
SSOV
LEAK DETECTION
BALL VALVE
LEAK DETECTION
BALL VALVE