Installation Guide

41
PC702 2–Stage Boiler Reset Control Connected To 2 EXP Zone Valve Controls
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
H
N
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
SWITCH SETTINGS
M
aster/Slave: Master
P
riority Zone: On or Off
Reset/Normal: Reset
SWITCH SETTINGS
Master/Slave: Slave
Priority Zone: Off
Reset/Normal: Normal
120 VAC
INPUT
MASTER
SLAVE
DHW
PUMP
DRY
CONTACTS
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
1234
ZONE 5
1234
ZONE 6
PRIORITY
ZONE
2 WIRE ZONE VALVE
(NO END SWITCH)
MUST USE JUMPER
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
ZVC 406-EXP-4
SIX ZONE EXPANDABLE
ZONE VALVE CONTROL
POWER IN
24 VAC
N/O COM
N/C
ZONE 6 PUMP
END SWITCH
SLAVE
PRIORITY ON
RESET
POST PURGE ON
PRIORITY PROTECTION ON
PUMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
NORMAL
OFF
OFF
OFF
4 MIN/24 HOUR
THERMOSTATS (24 VAC)
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
VALVE 5
T STAT 6
VALVE 6
POWER
LED
INDICATORS
T STAT 5
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6 NET
EXPANSION
MAIN
PRIORITY
XX
XX
AB
CRW
CRW
CRW
CRW
CRW
CRW
C
12
END SWITCH THERMOSTATS (24 VAC)
PRIORITY
24 VAC ZONE VALVES
1
234
ZONE 1
1
234
ZONE 2
1
234
ZONE 3
1
234
ZONE 4
1
234
ZONE 5
1
234
ZONE 6
PRIORITY
ZONE
2 WIRE ZONE VALVE
(NO END SWITCH)
M
UST USE JUMPER
TACO
3 WIRE
ZONE VALVE
1
2
3
JUMPER
3
& 4
MOTOR END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
S
ELF CLOSING)
JUMPER
3 & 4
ZVC 406-EXP-4
SIX ZONE EXPANDABLE
ZONE VALVE CONTROL
POWER IN
24 VAC
N/O COM N/C
PUMP END
SWITCH
ZONE 6 PUMP
END SWITCH
SLAVE
P
RIORITY ON
RESET
POST PURGE ON
PRIORITY PROTECTION ON
P
UMP EXERCISE ON
30 SEC/2 WK
M
ASTER
O
FF
NORMAL
OFF
OFF
O
FF
4 MIN/24 HOUR
THERMOSTATS (24 VAC)
I
NDIRECT
W
ATER HEATER
A
QUASTAT OR
T
HERMOSTAT
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T
STAT 3
V
ALVE 3
T
STAT 4
V
ALVE 4
VALVE 5
T
STAT 6
V
ALVE 6
P
OWER
LED
INDICATORS
T STAT 5
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
NET
EXPANSION
MAIN
PRIORITY
XX
X
X
AB
C
RW
CRW
C
RW
CRW
C
RW
CRW
C
12
E
ND SWITCH THERMOSTATS (24 VAC) PRIORITY
24 VAC ZONE VALVES
PRIORITY
PRIORITY
XX
PUMP END
SWITCH
XX
P
OWER
C
ONTROLS
ACCESSORY
P
ORT
FUSE
5 AMP
FUSE
5 AMP
POWER
CONTROLS
ACCESSORY
PORT
FUSE
5 AMP
FUSE
5 AMP
NOTE 2: When a circulator
is used on the priority zone
instead of a zone valve,
jumper 3 and 4 of the
priority zone.
See NOTE 2
NOTE 1: Terminals C are for
optional 24V thermostat
COMMON connections.
Powered from Transformer A
A
B
A
B
Powered from Transformer A
Powered from Transformer B
Powered from Transformer A
Powered from Transformer B
Powered from Transformer B
See NOTE 1
TTT
TTT
SYSTEM PUMP AND BOILER TURN ON
WHEN ANY ZONE VALVE OPENS.
DHW PUMP TURNS ON ONLY
WHEN PRIORITY ZONE CALLS.
SYSTEM
PUMP
ZONE
CONTROL
BOIL
SEN
OUT
SEN
B
OILER SENSOR
O
UTDOOR
S
ENSOR
PC702
STAGE
1
STAGE
2
BOILER
#2
BOILER
#1
DHW
DEMAND
W
IRING NEEDED ONLY IF
PRIORITY ZONE IS DHW