Installation Guide

19
SR501-EXP and PC702 Boiler Reset Control Connected to an Existing Switching Relay
F
OUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON
OFF
PRIORITY
120V RELAY
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
P
OWER
INPUT
120 VAC
INPUT
ZONE1 ZONE2 ZONE3 ZONE4
ZONE1 ZONE2 ZONE3 ZONE4
FUSE 1 AMP
24 VAC POWER
SR 504
Z
ONE 2
POWER
ZONE 1
Z
ONE 3
Z
ONE 4
THERMOSTATS
H
N
MASTER
EXISTING
ZONE
CONTROL
T
P
RIMARY
S
YSTEM
C
IRCULATOR
(Optional)
JUMPER
D
HW
HEATER
CIRCULATOR
N
ote: If Zone Control comes on without a call for heat,
reverse Reset Override input (1 & 2) wires on SR501-EXP.
SWITCH SETTINGS
Master/Slave: Master
R
eset/Normal: Reset
POWER
Z
ONE 1
LED
INDICATORS
FUSE
6 AMP
FUSE
6 AMP
SR 501-EXP-4
POWER
CONTROLS
S
LAVE
P
RIORITY ON
R
ESET
P
RIMARY PUMP ON
P
OST PURGE ON
P
RIORITY PROTECT ON
P
UMP EXERCISE ON
30 SEC/2 WK
M
ASTER
O
FF
O
FF
O
FF
O
FF
O
FF
N
ORMAL
4 MIN/24 HOUR
A
CCESSORY
PORT
HN/O NH
120 VAC
CIRCULATOR
PRIMARY
OUTPUT
N/C
INPUT
120 VAC
END
SWITCH
RESET
OVERRIDE
THERMOSTATEXPANSION
X WR X1A 2CB
24 VOLTS AC ONLY
C
SINGLE ZONE
EXPANDABLE SWITCHING RELAY
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
ZONE
CONTROL
B
OIL
SEN
O
UT
SEN
BOILER SENSOR
OUTDOOR
SENSOR
PC702
STAGE
1
STAGE
2
B
OILER
#2
BOILER
#1
DHW
DEMAND
WIRING NEEDED ONLY IF
PRIORITY ZONE IS DHW
SR501-EXP and PC705 Variable Speed Pump Injection Control Connected
to an Existing Switching Relay
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON
OFF
PRIORITY
120V RELAY
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
POWER
INPUT
120 VAC
INPUT
ZONE1 ZONE2 ZONE3 ZONE4
ZONE1 ZONE2 ZONE3 ZONE4
FUSE 1 AMP
24 VAC
POWER
SR 504
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
THERMOSTATS
BOILER
H
N
EXISTING
ZONE
CONTROL
T
TO: "TT" ON BOILER
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
THERMOSTATEXPANSION
X WR X1A 2CB
24 VOLTS AC ONLY
C
SINGLE ZONE
EXPANDABLE SWITCHING RELAY
INDIRECT
WATER HEATER
AQUASTAT OR
THERMOSTAT
ZONE
CONTROL
BOIL
SEN
OUT
SEN
BOILER SENSOR
OUTDOOR
SENSOR
PC705-2
SUP
SEN
SUPPLY SENSOR
INJECTION
CIRCULATOR
SYSTEM
CIRCULATOR
BLACK
BLUE
RED
GREEN/GROUND
(SEE NOTE B
ON PAGE 22)
PRIMARY
SYSTEM
CIRCULATOR
(Optional)
Note: If Zone Control comes on without a call for heat,
reverse Reset Override input (1 & 2) wires on SR501-EXP.
JUMPER