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[Danford50]

looking at my freedom elite 2017 I seen something call a idolater delay relay what is it function can anyone tell me.

[JamieGeek]

If its the BIRD you're talking about (Bi-directional Isolator Relay Delay) its function is to charge both batteries after a short delay.

When the voltage on either side (house, or chassis) rises above a setpoint value for several minutes the BIRD tells the trombetta relay to close and connect the house and chassis batteries together in order to charge them.

Thus a few minutes after starting, or plugging in the BIRD will close the relay and both batteries will get charge voltage.