Installation Guide

SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Zone Valve Control
120 VAC
INPUT
BOILER
H
N
E
XISTING
Z
ONE
CONTROL
TO: "TT" ON BOILER
DHW HEATER
CIRCULATOR
N
ote: If Zone Control comes on without a call for heat,
reverse Reset Override input (1 & 2) wires on SR501-EXP.
ZONE
CONTROL
B
OIL
SEN
O
UT
SEN
BOILER SENSOR
OUTDOOR
SENSOR
PC700
2
4 VAC
P
OWER IN
Z
ONE 2 ZONE 3 ZONE 4
MODE
NORMAL RESET
FUSE
(3 AMP MAX)
Z
ONE 1
TT
TT TT TT
ZONE 4
PRIORITY
O
FF
ON
N/O COM
N/C
ZONE 4 RELAY
1234 1234
ZONE 1 ZONE 2
2
WIRE ZONE VALVE
(NO END SWITCH)
JUMPER
3
& 4
TACO
3
WIRE ZONE VALVE
1
2
3
1234
ZONE 3
MOTOR
END
SWITCH
4 WIRE ZONE VALVE
(
POWER OPEN,
SELF CLOSING)
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T
STAT 4
VALVE 4
P
OWER
END
SWITCH
EXTRA
E
ND
S
WITCH
MAIN
24
V
AC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
W
HITE
BLACK
ZVC 404
FOUR ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
1234
ZONE 4
PRIORITY
ZONE
J
UMPER
3 & 4
SEE NOTE
THERMOSTATS
T
T
T
Note: When a circulator is used on the
p
riority zone instead of a zone valve,
jumper 3 and 4 of the priority zone.
ZONE VALVE SYSTEM
CIRCULATOR
I
NDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
MASTER
P
RIMARY SYSTEM
C
IRCULATOR
(Optional)
SWITCH SETTINGS
M
aster/Slave: Master
Reset/Normal: Reset
POWER
ZONE 1
LED
I
NDICATORS
FUSE
6
AMP
FUSE
6
AMP
SR 501-EXP-4
P
OWER
C
ONTROLS
SLAVE
PRIORITY ON
R
ESET
P
RIMARY PUMP ON
POST PURGE ON
P
RIORITY PROTECT ON
P
UMP EXERCISE ON
3
0 SEC/2 WK
MASTER
OFF
O
FF
OFF
O
FF
O
FF
N
ORMAL
4
MIN/24 HOUR
A
CCESSORY
P
ORT
HN/O NH
1
20 VAC
CIRCULATOR
PRIMARY
O
UTPUT
N/C
INPUT
120 VAC
E
ND
SWITCH
R
ESET
OVERRIDE
T
HERMOSTATEXPANSION
X W
R
X
1A2CB
24 VOLTS AC ONLY
C
SINGLE ZONE
EXPANDABLE SWITCHING RELAY
Connecting a DHW Heater to an Existing Heating Only Zone Valve Control
Using an SR501-EXP and PC700 Boiler Reset Control
120 VAC
INPUT
BOILER
H
N
EXISTING
ZONE
CONTROL
DHW HEATER
CIRCULATOR
TO: "TT" ON BOILER
ZONE
CONTROL
BOIL
SEN
OUT
SEN
BOILER SENSOR
OUTDOOR
SENSOR
PC700
24 VAC
P
OWER IN
ZONE 2 ZONE 3 ZONE 4
MODE
N
ORMAL RESET
FUSE
(3 AMP MAX)
ZONE 1
TT
TT TT TT
ZONE 4
PRIORITY
O
FF
O
N
N
/O COM
N/C
Z
ONE 4 RELAY
1234 1234
ZONE 1 ZONE 2
2 WIRE ZONE VALVE
(NO END SWITCH)
JUMPER
3 & 4
TACO
3 WIRE ZONE VALVE
1
2
3
1234
ZONE 3
MOTOR
END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
END
SWITCH
E
XTRA
E
ND
S
WITCH
MAIN
24
V
AC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
I
NPUT
WHITE
BLACK
ZVC 404
FOUR ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
1234
ZONE 4
PRIORITY
ZONE
JUMPER
3 & 4
SEE NOTE
THERMOSTATS
T
T
T
Note: When a circulator is used on the
priority zone instead of a zone valve,
jumper 3 and 4 of the priority zone.
ZONE VALVE SYSTEM
CIRCULATOR
SLAVE
MASTER
SWITCH SETTINGS
Master/Slave: Master
Reset/Normal: Reset
POWER
ZONE 1
LED
INDICATORS
FUSE
6 AMP
FUSE
6 AMP
SR 501-EXP-4
POWER
C
ONTROLS
SLAVE
PRIORITY ON
RESET
PRIMARY PUMP ON
POST PURGE ON
PRIORITY PROTECT ON
PUMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
OFF
OFF
OFF
OFF
NORMAL
4 MIN/24 HOUR
ACCESSORY
PORT
HN/O NH
120 VAC
CIRCULATOR
PRIMARY
OUTPUT
N/C
INPUT
120 VAC
END
SWITCH
RESET
OVERRIDE
T
HERMOSTATEXPANSION
X WR X1A 2CB
24 VOLTS AC ONLY
C
SINGLE ZONE
EXPANDABLE SWITCHING RELAY
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
NOTE 1: Terminals C are for
optional 24V thermostat
COMMON connections.
See NOTE 1
18