Installation Guide

Y1
W
G
O/B
R
X
Y1
Y2
W1
W2
G
O/B
R
X
Y1
Y2
W1
W2
G
O/B
R
Y1
Y2
W1
W2
G
O/B
R
R
X
iO-TWIN
1 2 3 4 5 6 7 8
iO-LL
LEAD/LAG
CONTROL
Y1
W
G
O/B
R
X
Y1
W
G
O/B
R
X
WIRING DIAGRAM USING iO-LL LEAD/LAG CONTROLLERS AND
iO-TWIN TWINNING KIT AND RY-2 DPDT RELAY FOR
2 HEAT / 1 COOL HEAT PUMP
NC C NO NC C NO
24V
Indianapolis, IN 46237
www.iohvaccontrols.com
For Technical Support Call Toll Free: 866-225-5032