Taco ZVC405 User Manual

22
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON OFF
PRIORITY
120V RELAY
FUSE 1 AMP
24 VAC POWER
MASTER
1234
PLUG-IN CARDS
RESET NORMAL
SLAVE
POWER CONTROL INTERFACE
THERMOSTATS
ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VAC INPUT
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
ZONE1 ZONE2 ZONE3 ZONE4
POWER
INPUT
ZONE 2 POWER ZONE 1 ZONE 3 ZONE 4
JUMPER
H
N
ZONE
CONTROL
BOIL
SEN
OUT
SEN
BOILER SENSOR
OUTDOOR
SENSOR
PC702
STAGE
1
STAGE
2
BOILER
#2
BOILER
#1
DHW
DEMAND
SWITCH SETTINGS
Master/Slave: Master Reset/Normal: Normal Priority Zone: On or Off
SR 504-EXP
WIRING NEEDED ONLY IF
PRIORITY ZONE IS DHW
SYSTEM
CIRCULATOR
(OPTIONAL)
T
PC702 2–Stage Boiler Reset Control Connected to EXP Switching Relay

Taco ZVC405 Specifications

General

Zones	5
Voltage	24VAC
Input Voltage	120VAC
Transformer	40 VA
Priority Zone	Yes
Switching	SPDT
Relay Type	Electromechanical
Control Signal	24 VAC
Housing Material	Plastic