9/23/2023 0 Comments Dungs gas valve lpg injector5) Press the S1 button to run the unit down into the lowest fire, and hook up your digital manometer onto the offset tapping 6) Once low fire has been established, start making adjustments to the offset adjustment screw targeting -.02" W.C. pressure drop the unit will start roughly. ![]() 3) Start up boiler using the service mode and if necessary use your hand to throttle the air/gas mixture assembly to get unit to establish flame 4) Once the unit is running, check incoming gas pressure again. We’re looking for 7” water column (W.C.) 2) Bottom out (CW) the throttle adjustment screw and bring back 2½ turns (CCW) for a 399 or 6 turns (CCW) on a Dungs valves. Natural gas Munchkin calibration procedure 1) Loosen inlet pressure tapping and set up your manometer to test incoming gas pressure.
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