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RC GRH YW2 W1A OBC
3-WIRE
HYDRONIC
ZONE VALVE
SYSTEM
XFMR
TYPICAL 24-VOLT, CONVENTIONAL, 1-STAGE, HOT WATER
HEAT ONLY SYSTEMS WITH A 3-WIRE ZONE VALVE
A
6
RH
R
V
3
Y
W1
W
H
4
C
Factory RH-RC Jumper Wire Installed
O
P
T
I
O
N
A
L
#2
Lux Products PSP721U Thermostat User Manual