At what pneumatic air pressures does the Fresh Air and Exhaust
dampers close?
The Fresh Air and Exhaust dampers close start close at 3 psi
and should be fully closed at 8.5 psi. Note: The Exhaust damper
should not close fully, it should only close about 90%.
The Humidity valve will start to open at 9 psi and will be
fully open at 15 psi.
The oven chamber actuator, whether it is a gas burner
actuator or a steam coil valve, will start to open at
approximately 3 psi and will be fully open at 15 psi.