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

SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Switching Relay
OUTDOOR
SENSOR
PC700
ZONE
BOIL OUT
CONTROL
SEN SEN
BOILER SENSOR
BOILER

Connecting a DHW Heater to an Existing Heating Only Switching Relay

OUTDOOR
SENSOR
PC700
ZONE
BOIL OUT
CONTROL
SEN SEN
BOILER SENSOR
BOILER
18
TO: "TT" ON BOILER
POWER
CONTROLS
END
EXPANSION

THERMOSTAT

SWITCH OVERRIDE
X X 1 2 3 4
T/R T/W COM
K1-A
MASTER
SR 501-EXP
FUSE
1 AMP
SLAVE
K1
FUSE
5 AMP
K1-B
N H ZC ZR
POWER
120VAC 120VAC
INPUT
INPUT OUTPUT OUTPUT
MASTER
JUMPER
Using an SR501-EXP and PC700 Boiler Reset Control
AQUASTAT ON
A
TO: "TT" ON BOILER
MASTER
POWER
CONTROLS
END
EXPANSION THERMOSTAT
SWITCH
X X 1 2 3 4
T/R T/W COM
K1-A
MASTER
FUSE SR 501-EXP
1 AMP
SLAVE
K1
FUSE
5 AMP
K1-B
N H ZC ZR
POWER 120VAC 120VAC
INPUT INPUT OUTPUT
JUMPER
Note: If Zone Control comes on without a call for heat,
reverse Reset Override input (1 & 2) wires on SR501-EXP.
EXISTING
ZONE
CONTROL
MODE
RESET
RESET
1 2
NORMAL
POWER
K2
T STAT
K2-A K2-A
H H
CIRC PRIORITY
OUTPUT FUSE 1 AMP
PRIMARY
SYSTEM
CIRCULATOR
(Optional)
DHW HEATER
EXISTING
ZONE
CONTROL
MODE
RESET
OVERRIDE
RESET
1 2
NORMAL
POWER
K2
T STAT
K2-A K2-A
H H
CIRC PRIORITY
FUSE 1 AMP
OUTPUT OUTPUT
DHW
HEATER
CIRCULATOR
AQUASTAT ON
A
DHW HEATER
THERMOSTATS
T
ZONE 4
SR 504
PRIORITY
ZONE1 ZONE2 ZONE3 ZONE4
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
120V RELAY
X X
ZONE1 ZONE2 ZONE3 ZONE4 POWER
ZC ZR
END
INPUT
120 VOLT CIRCULATORS
SWITCH
JUMPER
DHW
HEATER
CIRCULATOR
THERMOSTATS
T
SLAVE
SR 504
ZONE1 ZONE2 ZONE3 ZONE4
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
120V RELAY
X X
ZONE1 ZONE2 ZONE3 ZONE4 POWER
ZC ZR
END
INPUT
120 VOLT CIRCULATORS
SWITCH
REMOVE
JUMPER
ON
OFF
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
120 VAC
INPUT
H
N
ZONE 4
PRIORITY
ON
OFF
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
120 VAC
INPUT
H
N