5
SCALE 1 :
1
Thermostat
If 2-pipe with
auxiliary electric heat
24vac
24 volt
water
valve
H
2
0 Changeover Sensor
(G100-71520306)
(closes below 60˚,
opens above 75˚)
R
G
Y1
G3
W1
G2
C
H2O
R
V
EH
C
R
C
G3
G2
G
COM
IEC relay board
L2
L2
LO
W
ME
D
HI
GH
L1
CO
M
CO
M
LO
W
ME
D
CO
M
HI
GH
2-Pipe, Low Voltage Valves,
H2O Changeover Sensor
Wiring Diagram