Benchmark Platinum-Edge: Operation-Service Manual
SECTION 3 - START SEQUENCE
OMM-0137_D • GF-211
•
7/16/2019
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Start Sequence
Figure 3-1e: BMK 5000-6000: SSOV Location
3. The Auxiliary Delay occurs for a configurable length of time and the Delayed Interlocks are
closed.
4. Once all required safety device switches are closed, a purge cycle is initiated and the
following events occur:
a. The Blower relay energizes and turns on the blower.
b. The Air/Fuel Valve rotates to the full-open purge position and closes purge position
switch. The dial on the Air/Fuel Valve (Figure 3-2a and 3-2b) will read
100
to indicate
that it is full-open (100%).
c.
The
Fire Rate
bargraph on the Controller’s front face shows 100%.
Figure 3-2a: BMK 750 & 1000 Air/Fuel Valve in Purge Position
STEPPER MOTOR
TO
BLOWER
AIR INLET
100
UPSTREAM
SSOV
TO AIR/FUEL
VALVE
GAS INLET
MANUAL SHUT-
OFF VALVE
DOWNSTREAM
SSOV WITH
POC
HIGH GAS
PRESSURE SWITCH
- BMK 6000
:
10.5” W.C., 2.6 kPa
- BMK 5000
:
11.0” W.C., 2.7 kPa
UPSTREAM LOW GAS
PRESSURE SWITCH
- BMK 6000
:
8.5” W.C., 2.1 kPa
- BMK 5000
:
8.0” W.C., 2.0 kPa
