Taco SR501 User Manual

16
BOILER
120 VAC INPUT
TO: "TT" ON BOILER
H
N
A
SR 502
ZONE1 ZONE2 ZONE3
24 VAC
POWER
FUSE 1 AMP
ZONE1 ZONE2 ZONE3
JUMPERS
N P ZC H X ZR
1
X
2
ZONE 2 POWER ZONE 1
TWO ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
A
PRIORITY
OFF
1234
EXPANSION
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON OFF
PRIORITY
120V RELAY
FUSE 1 AMP
24 VAC POWER
MASTER
PLUG-IN CARDS
RESET NORMAL
SLAVE
POWER CONTROL INTERFACE
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-EXP
ZONE 2 POWER ZONE 1 ZONE 3 ZONE 4
JUMPER
SWITCH SETTINGS
Master/Slave: Master Reset/Normal: Normal Priority Zone: On
1234
EXPANSION
SR504-EXP
T
FOUR ZONE SWITCHING RELAY
WITH OPTIONAL PRIORITY
ZONE 4
ON OFF
PRIORITY
120V RELAY
FUSE 1 AMP
24 VAC POWER
MASTER
PLUG-IN CARDS
RESET NORMAL
SLAVE
POWER CONTROL INTERFACE
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-EXP
ZONE 2 POWER ZONE 1 ZONE 3 ZONE 4
JUMPER
SWITCH SETTINGS
Master/Slave: Slave Reset/Normal: Normal Priority Zone: Off
SR504-EXP
T
DHW
CIRCULATORS
AQUASTATS ON
DHW HEATERS
MASTER SLAVE
ZONE
NOT
USED
2 Indirect Water Heaters with Priority Connected to EXP Switching Relays

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