Start/Stop Levels - Watts AERCO Benchmark BMK5000 Operation And Service Manual

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 3 - START SEQUENCE

3.3 START/STOP LEVELS

The start and stop levels are the Air/Fuel Valve positions (% open) that start and stop the unit,
based on load. These levels are Factory preset as follows:
TABLE 3-1a: Start/Stop Levels – NATURAL GAS
BMK BMK
750/ 750/1000
1000 DF
Start
22% 24%
Level:
Stop
18% 18%
Level:
Ignition
35% 30%
Position
TABLE 3-1b: Start/Stop Levels – PROPANE GAS
BMK
BMK
750/1000
750/
1000
DF
Start
22% 24%
Level:
Stop
18% 18%
Level:
Ignition
35% 30%
Position
Normally, these settings do not require adjustment.
Note that the energy input of the boiler is not linearly related to the Air/Fuel Valve position.
OMM-0137_J •
12/20/2022
BMK BMK BMK
1500 2000 2500
20% 24% 24%
16% 18% 16%
29% 29% 29%
BMK BMK BMK
1500 2000 2500
20% 24% 26%
16% 18% 18%
29% 29% 29%
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
BMK BMK BMK
3000 4000 5000N
20% 27% 24%
14% 23% 18%
29% 45% 40%
BMK BMK
BMK
4000 5000N
3000
22% 24% 24%
14% 18% 18%
29% 35% 35%
BMK
4000 &
BMK BMK
5000 6000
5000N
DF
24% 24% 24%
18% 18% 18%
35% 35% 50%
BMK BMK
5000 6000
24% 24%
18% 18%
35% 50%
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