Smart 40 Indirect Water Heater Manual

Installation - Wiring
H
N
High Vo l t a g e
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)
Zone Va lv e
Zone Va lv e
Zone Va lv e
1
2C
W
ater Heater
Thermostat
S
nap-Set
Water
H
eater
Zone
*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
17
Typical 3-wire Zone Valve Zoning,
without Domestic Priority
H
N
H
igh Vo l t a g e
1
20
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
T
ransformer
(Power)
Z
one Va lv e
Zone Valve
Zone Va lv e
1
2
C
Water Heater
T
hermostat
Snap-Set
W
ater
Heater
Z
one
Boiler
Thermostat
Terminals
High Voltage
Low Vo l t a g e
Boiler Low Voltage
Typical 4-wire Zone Valve Zoning,
without Domestic Priority
F
ig. 16:
Fig. 17:
661A0300 - Rev B
Smart manual_Smart manual 10/29/14 10:00 AM Page 19