Large screw terminals connections makes wiring easy with three pump screw terminal connections.
Pump terminals connection have 120 VAC outputs for simplified pump connections. Zone valve
connections can be 2, 3 or 4 wire.
Z-oneLink™ unlimited expansion allows connecting additional ZVR & ZSR
series relay controls to a Master ZVR. Communication is accomplished by
connecting three wires (thermostat wire) to the communication terminals
located in the upper right hand corner. The dip switch is positioned to Master /
Slave position. A demand for heat from any zone will fire the boiler and start the
pump. Only one relay board can be the Master and Priority, Slave is used for subsequent boards.
L
POWER IN
N
L
ZONE #1
PUMP
N
L
SEC
PUMP
N
ZONE 1
EN
SWI
MOTOR
L
SYSTEM
PUMP
N
COMMS
D
P
Wiring terminals
ZONE 1
END
SWITCH
MOTOR
Z
MOTO
Wiring 2 wire, 3 wire & 4 wire zone valves
The Taco 570 three wire zone valve presents a unique wiring
challenge. When connecting the Taco 570, the wiring of this
valve can only be done in one way. The left motor terminal on
the ZVR series control must be connected to terminal 2 on the
zone valve. The right motor terminal must be connected to
terminal 1 on the zone valve. Lastly, the left end switch terminal
must be connected to terminal 3 on the zone valve. Failure to
follow schematic will lead to damage of product.
Since a two wire actuator does not have an end switch for
feedback to the relay box, the end switch terminals must have
a jumper to simulate the end switch. If the end switch jumper
is not installed, no demand will be sent to the boiler and the
pumps will not turn on
1
2
3
2 1 3
The four wire zone valve is the most straight forward of the three
types of valves to wire. Simply connect the two motor leads to
motor leads, and the two end switches to end switches.
NE 2
END
SWITCH
ZONE 3
END
SWITCH
MOTOR
M
ZONE 1
END
SWITCH
OR
ZONE 2
END
SWITCH
MOTOR
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