Taco SR501 User Manual

38
2 EXP Zone Valve Controls Connected Together with System, DHW and Secondary Pumps
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
FUSE 7 AMP MAX
TT
TT TT TT TT TT
ZONE 6
OFF
ON
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
1234
ZONE 5
1234
ZONE 6
MODE
NORMALRESET
PRIORITY
ZONE
2 WIRE ZONE VALVE
(NO END SWITCH)
TACO
3 WIRE ZONE VALVE
1
2
3
JUMPER
3 & 4
MOTOR END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN, SELF CLOSING)
JUMPER
3 & 4
1234
MASTER
SLAVE
POWER
CONTROLS
PLUG-IN
CARDS
PRIORITY
TACO, INC ZVC406-EXP
T STAT 1
T STAT 2
T STAT 3
T STAT 4
T STAT 5
T STAT 6
POWER ON
VALVE 1
VALVE 2
VALVE 3
VALVE 4
VALVE 5
VALVE 6

SEE NOTE
EXPANSION
ZVC 406-EXP
SIX ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
24 VAC
POWER IN
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
TO BOILER
AQUASTAT RELAY
N/O COM
ZONE 6 RELAY
N/C
END
SWITCH
A
PUMP
END
SWITCH
B
BOILER
H
N
BOILER
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
FUSE 7 AMP MAX
TT
TT TT TT TT TT
ZONE 6
OFF
ON
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
1234
ZONE 5
MODE
NORMALRESET
2 WIRE
ZONE VALVE
(NO END SWITCH)
TACO
3 WIRE
ZONE VALVE
1
2
3
JUMPER
3 & 4
MOTOR END
SWITCH
4 WIRE
ZONE VALVE
(POWER OPEN, SELF CLOSING)
1234
MASTER
SLAVE
POWER
CONTROLS
PLUG-IN
CARDS
PRIORITY
TACO, INC ZVC406-EXP
T STAT 1
T STAT 2
T STAT 3
T STAT 4
T STAT 5
T STAT 6
POWER ON
VALVE 1
VALVE 2
VALVE 3
VALVE 4
VALVE 5
VALVE 6
EXPANSION
ZVC 406-EXP
SIX ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
POWER IN
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
DRY
CONTACTS
N/O COM
ZONE 6 RELAY
N/C
END
SWITCH
A
PUMP
END
SWITCH
B
BOILER
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
Note: When a circulator is used on the
priority zone instead of a zone valve,
jumper 3 and 4 of the priority zone.
SWITCH SETTINGS
Master/Slave: Master
Reset/Normal: Normal
Priority Zone: On
SWITCH SETTINGS
Master/Slave: Slave
Reset/Normal: Normal
Priority Zone: Off
A
AQUASTAT ON
DHW HEATER
TTT
T T T
120 VAC
INPUT
1234
ZONE 6
PRIORITY
ZONE
JUMPER
3 & 4
SEE NOTE
MASTER
SLAVE
SYSTEM PUMP AND BOILER TURN ON WHEN ANY ZONE VALVE OPENS.
DHW PUMP TURNS ON ONLY WHEN PRIORITY ZONE CALLS.
SECONDARY PUMP TURNS ON WHEN ANY ZONE CALLS, EXCEPT PRIORITY ZONE.
DHW
PUMP
SYSTEM
PUMP
SECONDARY
PUMP

Taco SR501 Specifications

General

Model	SR501
Category	Control Unit
Input Voltage	120 VAC
Frequency	60 Hz
Switch Type	SPDT
Enclosure Rating	NEMA 1
Type	Relay
Operating Temperature	0°C to 40°C
Relay Output	24 VAC