Pc702 2–Stage Boiler Reset Control To 2 Exp Switching Relays - Taco SR501 Wiring Manual

PC702 2–Stage Boiler Reset Control Connected to 2 EXP Switching Relays
OUTDOOR
SENSOR
DHW
DEMAND
PC702
BOIL OUT ZONE
STAGE STAGE
1 2 SEN SEN CONTROL
BOILER SENSOR
BOILER
#1
BOILER
#2
SWITCH SETTINGS
Master/Slave: Slave
Reset/Normal: Normal
Priority Zone: No Priority
SLAVE
POWER
CONTROL
INTERFACE
24 VAC
POWER
SWITCH SETTINGS
Master/Slave: Master
Reset/Normal: Normal
Priority Zone: On or Off
SLAVE
1 2 3 4
MASTER
POWER EXPANSION
CONTROL
INTERFACE
24 VAC
120V RELAY
POWER
SWITCH
FUSE 1 AMP
WIRING NEEDED ONLY IF
PRIORITY ZONE IS DHW
PLUG-IN CARDS
MASTER
1 2 3 4
EXPANSION
RESET NORMAL
120V RELAY
X X
ZC ZR
END
SWITCH
FUSE 1 AMP
JUMPER
SYSTEM
CIRCULATOR
(OPTIONAL)
T
PLUG-IN CARDS
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SR 504-EXP
FOUR ZONE SWITCHING RELAY
RESET NORMAL
WITH OPTIONAL PRIORITY
X X
ZONE1 ZONE2
ZC ZR
END
120 VOLT CIRCULATORS
JUMPER
THERMOSTATS
T
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SR 504-EXP
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE1 ZONE2 ZONE3 ZONE4 POWER
120 VOLT CIRCULATORS
THERMOSTATS
MASTER
ZONE 4
PRIORITY
ON
OFF
ZONE3 ZONE4 POWER
INPUT
120 VAC INPUT
SLAVE
ZONE 4
PRIORITY
ON
OFF
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
INPUT
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
H
N
120 VAC INPUT
25