Taco SR504-EXP

5
SR502/503 Switching Relay Controlling Another SR502/503 Switching Relay
SR 503
24 VAC
POWER
FUSE 1 AMP
ZONE1 ZONE2 ZONE3
120 VOLT CIRCULATORS
ZONE1 ZONE2 ZONE3
TO: "TT" ON AQUASTAT CONTROL
JUMPER
N P ZC H X ZR
1
X
2
ZONE 2
POWER
ZONE 1
ZONE 3
THREE ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
TT T
SR 503
ZONE1 ZONE2 ZONE3
24 VAC
POWER
FUSE 1 AMP
120 VOLT
CIRCULATORS
ZONE1 ZONE2 ZONE3
120 VAC POWER
JUMPER
N P ZC H X ZR
1
X
2
THREE ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
T
A
T
BOILER
H
N
SLAVE
MASTER
AQUASTAT
ON DHW
HEATER
ZONE 2
POWER
ZONE 1
ZONE 3
DHW
HEATER
CIRCULATOR
PRIORITY ON
VIA JUMPER
PLACEMENT
PRIORITY OFF
VIA JUMPER
PLACEMENT