9
RC
G
RH
Y
W2
W1
A
OB
C
3-WIRE
HYDRONIC
ZO
N
E
V
A
LV
E
SY
STEM
XFMR
TYPICAL 24-VOL
T
, CONVENTIONAL, 1-ST
AGE, HOT W
A
TER
HEA
T ONL
Y SYSTEMS WITH A 3-WIRE ZONE V
A
L
V
E
A
6
RH
R
V
3
Y
W1
W
H
4
C
Factor
y RH-RC Jumper Wire Installed
O
P
T
I
O
N
A
L
#2