Watts AERCO Benchmark BMK5000 Operation And Service Manual page 62

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 5 – SAFETY DEVICE TESTING
LOW Gas Pressure Test Instructions: BMK3000 – 6000 Only
FM Natural Gas pressure
DBB Natural Gas pressure →____ x 0.5 + 0.9 = ______ min gas pressure
BMK5000N
Propane Gas pressure
FM Natural Gas pressure
LGP* Natural Gas pressure →____ x 0.5 + 0.9 = ______ min gas pressure
BMK5000
Propane Gas pressure
FM Natural Gas pressure
LGP* Natural Gas pressure →____ x 0.5 + 1.3 = ______ min gas pressure
BMK6000
Propane Gas pressure
* LGP refers to Low Gas Pressure models
6. Remove the cover from the Low Gas Pressure switch and set the dial indicator to 2 (the
minimum).
7. Open the external gas supply ball valve upstream of the unit.
8. On the Controller, go to:
Manual Mode control.
9. Adjust the Air/Fuel Valve position to 100% using the + (Plus) and – (Minus) controls.
10. While the unit is firing, read the CO value on the combustion analyzer and slowly decrease
the incoming gas supply pressure until the CO reading is approximately 300 ppm.
11. Take a reading of the inlet gas pressure. If the inlet pressure is below the minimum
calculated in step 5, above, then increase the pressure to match the calculated minimum.
12. Slowly turn the indicator dial on the Low Gas Pressure switch until the unit shuts down due
to a gas pressure fault.
13. Readjust the inlet gas pressure to what it was prior to the test.
14. Press the Edge Controller's CLEAR button to clear the fault.
15. The fault message should clear, the red FAULT LED go off, and the unit should restart.
16. For Dual Fuel units, repeat the previous procedure on the Propane gas train, starting with
the Propane Low Gas Pressure Switch.
OMM-0137_J •
12/20/2022
→____ x 0.5 + 0.9 = ______ min gas pressure
→ ____x 0.5 + 1.6 = ______ min gas pressure
→____ x 0.5 + 6.0 = ______ min gas pressure
→____ x 0.5 + 3.7 = ______ min gas pressure
→____ x 0.5 + 6.0 = ______ min gas pressure
→____ x 0.5 + 3.7 = ______ min gas pressure
Main Menu → Diagnostics → Manual Run
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
and then enable the
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