Installation Guide

17
F
OUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
O
N
OFF
PRIORITY
120V RELAY
120 VOLT CIRCULATORS
ZC ZR
X
X
END
SWITCH
POWER
I
NPUT
120 VAC
INPUT
Z
ONE1
Z
ONE2
Z
ONE3
Z
ONE4
ZONE1 ZONE2 ZONE3 ZONE4
FUSE 1 AMP
24 VAC POWER
SR 504
ZONE 2
P
OWER
Z
ONE 1
Z
ONE 3
ZONE 4
THERMOSTATS
BOILER
H
N
MASTER
EXISTING
ZONE
CONTROL
T
P
RIMARY
SYSTEM
CIRCULATOR
(Optional)
T
O: "TT" ON BOILER
J
UMPER
D
HW
H
EATER
CIRCULATOR
Note: If Zone Control comes on without a call for heat,
r
everse Reset Override input (1 & 2) wires on SR501-EXP.
ZONE
CONTROL
BOIL
SEN
OUT
SEN
B
OILER SENSOR
OUTDOOR
SENSOR
PC700
SWITCH SETTINGS
Master/Slave: Master
R
eset/Normal: Reset
P
OWER
Z
ONE 1
L
ED
INDICATORS
FUSE
6 AMP
FUSE
6 AMP
SR 501-EXP-4
P
OWER
C
ONTROLS
SLAVE
P
RIORITY ON
R
ESET
PRIMARY PUMP ON
P
OST PURGE ON
P
RIORITY PROTECT ON
P
UMP EXERCISE ON
30 SEC/2 WK
MASTER
O
FF
OFF
O
FF
O
FF
O
FF
N
ORMAL
4 MIN/24 HOUR
ACCESSORY
P
ORT
HN/O NH
120 VAC
CIRCULATOR
PRIMARY
OUTPUT
N/C
INPUT
120 VAC
E
ND
SWITCH
R
ESET
OVERRIDE
T
HERMOSTATEXPANSION
X W
R
X
1A2CB
24 VOLTS AC ONLY
C
S
INGLE ZONE
E
XPANDABLE SWITCHING RELAY
INDIRECT
WATER HEATER
A
QUASTAT OR
T
HERMOSTAT
SR501-EXP and PC700 Boiler Reset 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
REMOVE
JUMPER
DHW
HEATER
CIRCULATOR
ZONE
CONTROL
BOIL
SEN
OUT
SEN
BOILER SENSOR
OUTDOOR
SENSOR
PC700
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
P
OWER
CONTROLS
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
O
VERRIDE
THERMOSTATEXPANSION
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
Connecting a DHW Heater to an Existing Heating Only Switching Relay
Using an SR501-EXP and PC700 Boiler Reset Control