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63-8702 35
Zone Valve Controller
Priority
Zone 1
Zone 2
Zone 3 Zone 4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
Pump End
Switch
Zone 1 Pump
End Switch
X
XN/O
COM
N/C
N H
Input
120VAC
24 VAC Zone Valves
1
2
3
TACO 570
SERIES VALVE
TACO EBV VALVE
C
W/Y
End Switch
MCR37974
Taco Zone valves with HPZC Hydronic Panels.
NOTE: This diagram is specific to how Taco valves can wire to an HPZC zone valve panel. All zones other than an optional Domestic Hot Water
zone are wired the same. See other diagrams in this file for options on pump and line voltage wiring, using multiple panels for systems
over 6 zones, DHW priority, etc.
ZONE VALVES
R
C
W
R
C
W
R
C
W
R
C
W
Zone 1
Priority
Zone 2
Zone 3
Zone 4
24 VAC Thermostats
HPZC104
Four Zone
Zone Valve Controller
Priority
Zone 1
Zone 2
Zone 3 Zone 4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
Boiler
TT
End
Switch
TT
On/Off
Priority
End
Switch
On/ Off
Priority
Zone
Zone
Power
Boiler
End Switch
T-stat Call
Valve Open
DHW
Priority
12
34
Pump End
Switch
Zone 1 Pump
End Switch
X
XN/O
COM
N/C
N
H
Input
120VAC
24 VAC Zone Valves
40 VA
TRANSFORMER
THERMOSTATS
1
1
V8043 SERIES VALVES
WITH END SWITCHES
W
C
R
W
C
R
W
C
R
W
C
R
1
NC
C
NO
NO
C
NC
NC
C
NO
NO
C
NC
NC
C
NO
C
+
+
+
T
T
COM
120
240
OUT-1
SENSOR A
SENSOR B
SENSOR C
T775 BUS
DIGITAL INPUT
DIGITAL OUTPUT
ALARM
24 VAC
T775P
T
T
BOILER 1
TO SENSOR ON
SUPPLY PIPING
TO OUTDOOR
AIR SENSOR
120 VAC FROM DISCONNECT
T
T
BOILER 2
OUT-2
OUT-4
OUT-3
LINE POWER
T
T
T
T
COMMON NOT REQUIRED ON SOME THERMOSTAT MODELS.
GROUND REQUIRED BUT NOT SHOWN FOR DRAWING CLARITY. VERIFY WIRING
CONFORMS TO LOCAL CODE.
1
2
BOILER
BOILER
SYSTEM PUMP (PC3F-SERIES
AQUAPUMP OR EQUIVALENT)
MCR37975
2
T775P used with Hydronic panels for outdoor reset, and/or staging two boilers.
Hydronic Zoning System