Pc702 And Pc705 Controls Connected To 2 Exp Switching Relays - Taco SR501 Wiring Manual

PC702 and PC705 Controls Connected to 2 EXP Switching Relays

OUTDOOR
SENSOR
DHW
DEMAND
PC702
STAGE STAGE BOIL OUT ZONE
1 2 SEN SEN CONTROL
BOILER SENSOR
BOILER
#1
BOILER
#2
OUTDOOR
SENSOR
GREEN/GROUND
RED
BLUE
PC705-2
BLACK
BOIL SUP OUT ZONE
SEN SEN SEN CONTROL
SUPPLY SENSOR
BOILER SENSOR
28
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
POWER
FUSE 1 AMP
WIRING NEEDED ONLY IF
PRIORITY ZONE IS DHW
SWITCH SETTINGS
Master/Slave: Slave
Reset/Normal: Normal
Priority Zone: No Priority
(SEE NOTE B
ON PAGE 23)
SLAVE
SYSTEM MASTER
1 2 3 4
CIRCULATOR
EXPANSION
INJECTION
CIRCULATOR
24 VAC
POWER
FUSE 1 AMP
JUMPER
SYSTEM CIRCULATOR
(OPTIONAL LOCATION)
(SEE NOTE A ON PAGE 23)
PLUG-IN CARDS
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SR 504-EXP
FOUR ZONE SWITCHING RELAY
RESET NORMAL
WITH OPTIONAL PRIORITY
120V RELAY
X X
ZONE1 ZONE2
ZC ZR
END
SWITCH 120 VOLT CIRCULATORS
JUMPER
T
PLUG-IN CARDS
ZONE 1 ZONE 2 ZONE 3 ZONE 4
SR 504-EXP
FOUR ZONE SWITCHING RELAY
RESET NORMAL
WITH OPTIONAL PRIORITY
120V RELAY
X X
ZONE1 ZONE2
ZC ZR
END
SWITCH 120 VOLT CIRCULATORS
THERMOSTATS
T
MASTER
ZONE 4
PRIORITY
ON
OFF
ZONE3 ZONE4 POWER
INPUT
120 VAC INPUT
THERMOSTATS
SLAVE
ZONE 4
PRIORITY
ON
OFF
ZONE3 ZONE4 POWER
INPUT
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
POWER
ZONE 1
ZONE 2
ZONE 3
ZONE 4
H
N
120 VAC INPUT