LG AR-DR12-05A Installation And Operation Manual page 85

Combination Valve Adjustments
Conduct this step when the Commissioning Menu reaches the High Fire Setting screen. Connect a manometer to the outlet pressure tap on
the Honeywell combination valve and remove the cover over the outlet pressure adjustment screw. Use the outlet pressure adjustment screw
on the combination valve to adjust the outlet pressure to the value listed in the table.
Figure 45: Combination Valve Adjustment
Modulating Valve Adjustments
At start-up, remove the cover from the circuit board housing by loosen-
ing the two Phillips head retaining screws. Identify Button #1 and Button
#2 and also locate the LED indicator light.
Modulating Valve High Fire Setting
Conduct this step with the Commissioning Menu on the High Fire Set-
ting screen.
1. Connect a manometer to the test port on the burner manifold.
2. Press and hold button #1 until
the LED lights solid red. Re-
lease the button. Observe the
gas pressure on the manometer.
3. Adjust the modulating valve by
pushing button #1 to increase
the pressure or by pushing
button #2 to decrease the pressure.
4. Save the High Fire setting by simultaneously holding down buttons
#1 and #2 until the LED turns off. If the new setting is not saved
within five minutes, the modulating valve will default back to its last
saved setting.
During the adjustment process, each push of either button will increase or decrease the pressure in steps. Holding down either button auto-steps
and eliminates the need to repeatedly push the button. Use this feature to rapidly increase or decrease the gas flow.
INDIRECT GAS FIRED FURNACES
Due to our policy of continuous product innovation, some specifications may change without notification.
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Furnace Start Up
Figure 46: Modulating Valve Adjustment
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