WARNING: Wiring connec-
tions must be made in
accordance with all applic-
able electrical codes.
CAUTION: To prevent elec-
trical shock, disconnect
electric power to system at
main fuse or circuit breaker
box until installation is
complete. When a service
switch is installed, more
than one disconnect switch
may be required to deener-
gize this device for servic-
ing.
Zone Sentry Zone Valve Wiring Diagrams
LED
Motor
Circuit
End Switch
c
w/y
Simplified Internal
Schematic:
Thermostats
Transformer
To “T” Terminals
on Boiler Control
Transformer Relay
T
T
Up to 12 Valves per
40va Transformer
L1 (Hot)
L2
24 v
End Switch
Rh/Rc
w/y
Rh/Rc
w/y
Rh/Rc
w/y
w/y
c
End Switch
w/y
c
End Switch
w/y
c
L1 (Hot)
L2
Thermostat
To “T” Terminals
Motor
See Chart
See Chart
Red
Red
End Switch
Motor Wire Color
Honeywell = Yellow
Erie = Black
Sparco = Orange/Yellow
Honeywell, Erie and Sparco Wire Leads
Wiring a Taco Zone Sentry Zone Valve to Replace a
Honeywell, Erie or Sparco Valve:
Honeywell and Erie Terminal Block
L1 (Hot)
L2
Thermostat
To “T” Terminals
Motor
End Switch
TH
TR
TR
TH
ES
ES
L1 (Hot)
L2
Thermostat
To “T” Terminals on Boiler
Control Transformer Relay
Taco Zone Sentry Zone Valve
c
End Switch
w/y
Wiring a Taco Zone Sentry Zone Valve to Replace a
Flair or Taco 3-Wire Valve:
Taco Zone Sentry Zone Valve
Taco 570 Series
L1 (Hot)
L2
Thermostat
To “T” Terminals
Motor
End Switch
1
2
3
Flair
L1 (Hot)
L2
Thermostat
To “T” Terminals
Motor
End Switch
1
2
3
45
L1 (Hot)
L2
Thermostat
To “T” Terminals on Boiler
Control Transformer Relay
c
End Switch
w/y
Wiring a Taco Zone Sentry Zone Valve to Replace a
White Rodgers Valve:
L1 (Hot)
L2
To “T” Terminals on Boiler
Control Transformer Relay
Taco Zone Sentry Zone Valve
46
5
L1 (Hot)
L2
To “T” Terminals
Motor
End Switch
6
4
White-Rodgers (1311 or 1321)
4
56
Thermostat
5
2
3
1
Thermostat
c
End Switch
w/y
Typical Zone Sentry Zone Valve Wiring:
NOTE: Some power robbing thermostats require the use of a resistor (always use the resistor provided
by the thermostat manufacturer with the Zone Sentry). Consult the thermostat instructions for the
resistor installation.
