RLY1 COM RLY2 COM NC COM NO NC COM NO NC COM NO
INDOOR UNIT TRANSCEIVER
C
R
Y
O
G
W
C
R
Y
O
G
W
24V
COIL
NO C NC
24V
COIL
NO C NC
RLY1 COM RLY2 COM NC COM NO NC COM NO NC COM NO
OUTDOOR UNIT TRANSCEIVER
24V
COIL
NO C NC
24V
COM
HOT
LINE
C
R
Y
O
W
COMPRESSOR
REVERSING VALVE
DEFROST
SPDT
RELAY
ENERGIZED
WHEN UNIT
GOES INTO
DEFROST
SPDT
RELAY
SPDT
RELAY
iO-WR-XR WIRELESS RELAY USED FOR SINGLE COMPRESSOR
HEAT PUMP WITH DEFROST SIGNAL
Indianapolis, IN 46237
www.iohvaccontrols.com
For Technical Support: 866-225-5032
TRANSFORMER
COM
HOT
FAN
AUXILIARY HEAT