Watts AERCO Benchmark BMK750 Operation And Service Manual page 32

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 3 - START SEQUENCE
Start Sequence
1. The Controller's red DEMAND LED status indicator will light.
2. The unit checks all five pre-purge safety switches listed at the beginning of this section. The Edge [i]
Controller's ignition sequence screen walks you through the ignition screens and demonstrates (or
highlights) which switches are not met. SSOV locations are shown in Figure 3-1a through 3-1d.
NATURAL
GAS INLET
Figure 3-1a: BMK750 & 1000 SSOV Location (P/N 22322 shown)
MANUAL
SHUT-OFF
VALVE
Figure 3-1b: BMK1500 & 2000 SSOV Location (P/N 22314 shown)
OMM-0145_A99 • GF-218 •
LOW GAS
PRESSURE
SWITCH
TO
AIR/FUEL
VALVE
SSOV
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
9/18/2019
TO AIR/FUEL
VALVE
MANUAL
SHUT-OFF VALVE
SSOV
NATURAL
GAS INLET
HIGH GAS
PRESSURE
SWITCH
LOW GAS
PRESSURE
SWITCH
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