Taco SR501 User Manual

6
SR502/503 Switching Relay Controlling Another SR504/506 Switching Relay
SIX ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 6
ON
OFF
PRIORITY
120V RELAY
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
POWER
INPUT
120 VAC INPUT
TO: "TT" ON BOILER
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
ZONE1 ZONE2 ZONE3 ZONE4 ZONE5 ZONE6
FUSE 1 AMP
24 VAC
POWER
SR 506
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
ZONE 5
ZONE 6
THERMOSTATS
BOILER
H
N
SR 503
ZONE1 ZONE2 ZONE3
24 VAC
POWER
FUSE 1 AMP
120 VOLT
CIRCULATORS
ZONE1 ZONE2 ZONE3
JUMPERS
N P ZC H X ZR
1
X
2
THREE ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
T
A
T
MASTER
ZONE 2
POWER
ZONE 1
ZONE 3
SLAVE
T
PRIORITY ON
VIA JUMPER
PLACEMENT
REMOVE
JUMPER
PRIORITY
OFF
AQUASTAT
ON DHW
HEATER

Taco SR501 Specifications

General

Model	SR501
Category	Control Unit
Input Voltage	120 VAC
Frequency	60 Hz
Switch Type	SPDT
Enclosure Rating	NEMA 1
Type	Relay
Operating Temperature	0°C to 40°C
Relay Output	24 VAC