Taco SR501 User Manual

9
Priority Zoning Circulator Controlling 2 SR504/506 Switching Relays
ZONE 4
ON OFF
PRIORITY
120V RELAY
FUSE 1 AMP
ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
ZONE1 ZONE2 ZONE3 ZONE4
POWER
INPUT
SR 504
ZONE 2 POWER ZONE 1 ZONE 3 ZONE 4
TT T
BOILER
ZONE 4
ON OFF
PRIORITY
120V RELAY
FUSE 1 AMP
24 VAC
POWER
ZONE 1 ZONE 2 ZONE 3 ZONE 4
120 VAC INPUT
TO: "TT" ON BOILER
120 VOLT CIRCULATORS
ZC ZR
X X
END
SWITCH
ZONE1 ZONE2 ZONE3 ZONE4
POWER
INPUT
SR 504
ZONE 2 POWER ZONE 1 ZONE 3 ZONE 4
TT T
H
N
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
SLAVE
SLAVE
PRIORITY
OFF
PRIORITY
OFF
T T
24 VAC
POWER
ON
OFF
PRIORITY
POWER IN
THERMOSTAT
BOILER
PRIORITY
PRIORITY ZONING CIRCULATOR
PR-IN PR-OUT LIVE NEUT
1
2
3
4
A
AQUASTAT ON
DHW HEATER
120 VAC INPUT
MASTER
PRIORITY
ON
REMOVE
JUMPER
REMOVE
JUMPER

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