Sr501-Exp/Pc700 Boiler Reset Control Connected To A Zone Valve Control; Connecting A Dhw Heater To An Existing Heating Only Zone Valve Control - Taco SR501 Wiring Manual

SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Zone Valve Control
OUTDOOR
SENSOR
TO: "TT" ON BOILER
PC700
CONTROLS
ZONE
BOIL OUT
CONTROL
SEN SEN
BOILER SENSOR
FUSE
1 AMP
BOILER

Connecting a DHW Heater to an Existing Heating Only Zone Valve Control

OUTDOOR
SENSOR
TO: "TT" ON BOILER
PC700
MASTER
CONTROLS
ZONE
BOIL OUT
CONTROL
SEN SEN
BOILER SENSOR
FUSE
1 AMP
BOILER
Note: If Zone Control comes on without a call for heat,
reverse Reset Override input (1 & 2) wires on SR501-EXP.
POWER
MODE
END RESET
EXPANSION THERMOSTAT
SWITCH OVERRIDE
RESET
X X 1 2 3 4 T/R T/W COM 1 2
K1-A
MASTER
SR 501-EXP
NORMAL
SLAVE
POWER
K1 K2
T STAT
FUSE
5 AMP
K1-B K2-A K2-A
N H ZC ZR H H
POWER
120VAC 120VAC CIRC PRIORITY
INPUT
INPUT OUTPUT OUTPUT OUTPUT
JUMPER
PRIMARY
SYSTEM
CIRCULATOR
(Optional)
Using an SR501-EXP and PC700 Boiler Reset Control
AQUASTAT ON
A
DHW HEATER
POWER
MODE
END RESET
EXPANSION THERMOSTAT
SWITCH OVERRIDE
RESET
X X 1 2 3 4 T/R T/W COM 1 2
K1-A
MASTER
SR 501-EXP
NORMAL
SLAVE
K1 K2
FUSE
5 AMP
K1-B K2-A K2-A
N H ZC ZR H H
POWER
120VAC 120VAC CIRC PRIORITY
INPUT
INPUT OUTPUT OUTPUT OUTPUT
JUMPER
DHW HEATER
CIRCULATOR
EXISTING
WHITE
ZONE
120 VAC
24
VAC
INPUT
CONTROL
BLACK
NORMAL RESET
POWER IN
MAIN EXTRA
END END
SWITCH SWITCH
EXISTING
WHITE
ZONE
120 VAC
24
VAC
INPUT
CONTROL
BLACK
NORMAL RESET
POWER IN
POWER
T STAT
MAIN EXTRA
END END
SWITCH SWITCH
THERMOSTATS
T T
T
24 VAC
MODE
T T T T T T
ZONE 1 ZONE 2 ZONE 3
ZVC 404
FOUR ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3
N/O COM N/C
ZONE 4 RELAY 1 2 3 4 1 2 3 4 1 2 3 4
JUMPER
3 & 4
1
MOTOR
SWITCH
2
3
2 WIRE ZONE VALVE TACO 4 WIRE ZONE VALVE
(NO END SWITCH) 3 WIRE ZONE VALVE (POWER OPEN,
SELF CLOSING)
ZONE VALVE SYSTEM
CIRCULATOR
DHW HEATER
CIRCULATOR
THERMOSTATS
T T
T
24 VAC
MODE
T T T T T T
ZONE 1 ZONE 2 ZONE 3
ZVC 404
FOUR ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
ZONE 1 ZONE 2 ZONE 3
N/O COM N/C
ZONE 4 RELAY 1 2 3 4 1 2 3 4 1 2 3 4
JUMPER
3 & 4
1
MOTOR
2
3
2 WIRE ZONE VALVE TACO 4 WIRE ZONE VALVE
(NO END SWITCH) 3 WIRE ZONE VALVE (POWER OPEN,
SELF CLOSING)
ZONE VALVE SYSTEM
CIRCULATOR
AQUASTAT ON
A
DHW HEATER
ZONE 4
PRIORITY
OFF
ON
T T
T STAT 1
ZONE 4
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
ZONE 4
1 2 3 4
JUMPER
3 & 4
SEE NOTE
PRIORITY
ZONE
END
Note: When a circulator is used on the
priority zone instead of a zone valve,
jumper 3 and 4 of the priority zone.
H
120 VAC
INPUT
N
SLAVE
ZONE 4
PRIORITY
OFF
T T
ON
T STAT 1
ZONE 4
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
ZONE 4
1 2 3 4
JUMPER
3 & 4
SEE NOTE
PRIORITY
ZONE
END
SWITCH
Note: When a circulator is used on the
priority zone instead of a zone valve,
jumper 3 and 4 of the priority zone.
H
120 VAC
INPUT
N
19