9
MAGNA3 INSULATED PUMPS INSTALLATION MANUAL
Wiring cont.
MAGNA3RELAY Board - The MAGNA3RELAY board is operated from a dry contact closure. The dry contact closure
can either be from the heat pump control accessory relay or from a SPST 230VAC coil relay. Wiring diagrams are shown
below for connecting to the accessory relay (Figure 8) or SPST 230VAC coil relay (Figure 7). Use two-conductor 18AWG
thermostat wire from the heat pump accessory relay to the relay board HP IN and OUT terminals. NOTE: When connecting
to the ABC accessory SW2-4 and SW2-5 must be in the “OFF” position (cycles with compressor).
HP-1 OUT
HP-1 IN
HP-2 OUT
HP-2 IN
HP-3 OUT
HP-3 IN
HP-4 OUT
HP-4 IN
HP-5 OUT
HP-5 IN
ACC NO
ACC COM
OUT
IN
Figure 8: Accessory relay to MAGNA3RELAY board
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