I purchased an iaqualink kit with an RS4 board to control my spa.
It has 4 3hp relays.
Relay 1 is for the pump.
Relay 2 (aux 1) for a 240 volt blower
Relay 3 (aux 2) replaced with a 2 stage pump relay
Relay 4 (aux 3) for water colors led.
The heater for the spa is a heat exchanger that works off my oil burner. I have low voltage wire that turns on the boiler and circulator pump by completing the circuit by simply connecting the wires.
Is there a way to have the rs4 control the heater via the gas heater controls 1 and 2 on the board.
Does this close a circuit when activated or does it send out voltage to activate a relay?
If it sends out voltage to close a relay, can I have it control the 3 hp relay taken out of the aux 2 position so that it can open and close the ir unit to activate he boiler and circulator pump to the heat exchanger?
Is there a better wy to do this?
Thanks in advance