Air Makeup Unit Technical Training Manual

Section 6

Typical Sequence of Operation

After flame is proven, Carel controller begins sending DC signal to gas actuator to control flame size and therefore heat going into the booth.

• DC signal will modulate up and down based on temperature demand from the booth. • If not much heat is needed, valve will stay mostly closed and voltage will be low • If heat is needed, valve will fully open and voltage will be high.

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