Manual

Installation - Wiring
H
N
High Voltage
120
V
.A.C.
24
V.A.C.
Room
Thermostat
Room
Thermostat
Zone 1
Zone 2
Additional zones
Additional zones may
be added as shown above
Transformer
(Power)
Z
one Valve
Zone Valve
Zone Valve
1
2
C
Water Heater
Thermostat
S
nap-Set
W
ater
H
eater
Z
one
*Isolation Relay
Boiler
Thermostat
Terminals
* Use isolation relay on
3-wire zone valves with
non-isolated end switches.
Transformer and boiler
control can burn out if
isolation relay is not used
16
Typical 3-wire Zone Valve Zoning,
without Domestic Priority
H
N
High Voltage
120
V.A.C.
2
4
V.A.C.
Room
Thermostat
Room
Thermostat
Zone 1
Zone 2
Additional zones
Additional zones may
be added as shown above
T
ransformer
(Power)
Zone Valve
Zone Valve
Zone Valve
1
2C
W
ater Heater
T
hermostat
Snap-Set
W
ater
Heater
Zone
Boiler
Thermostat
Terminals
High Voltage
Low Voltage
Boiler Low Voltage
Typical 4-wire Zone Valve Zoning,
without Domestic Priority
Fig. 14:
Fig. 15: