FM Natural Gas pressure →____ x 0.5 + 6.0 = ______ min gas pressure
LGP * Natural Gas pressure →____ x 0.5 + 0.9 = ______ min gas pressure
Propane Gas pressure →____ x 0.5 + 3.7 = ______ min gas pressure
FM Natural Gas pressure →____ x 0.5 + 6.0 = ______ min gas pressure
LGP * Natural Gas pressure →____ x 0.5 + 1.3 = ______ min gas pressure
Propane Gas pressure →____ x 0.5 + 3.7 = ______ min gas pressure
* Applies to all models except Low Gas Pressure (LGP) 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: Main Menu → Diagnostics → Manual Mode and then enable the
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 [i] 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.
Figure 5-2a: BMK3000 LOW and HIGH Gas Pressure Test Components
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