Taco SR501 User Manual

SR501-EXP 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
MASTER
SLAVE
T
REMOVE
JUMPER
PRIORITY
OFF
DHW CIRCULATOR
POWER
T STAT
TO: "TT" ON BOILER
AQUASTAT ON
DHW HEATER
NZCZRHHH
POWER
INPUT
120VAC
INPUT
120VAC
OUTPUT
CIRC
OUTPUT
PRIORITY
OUTPUT
RESET
POWER
CONTROLS
FUSE
1 AMP
NORMAL
MASTER
SLAVE
END
SWITCH
ZONE
VALVE
THERMOSTATEXPANSION
X
COM T/W
T/R
X1 12243
JUMPER
TO: OPTIONAL ZONE VALVE
OR iSeries MIXING VALVE
MODE
FUSE
5 AMP
SR 501-EXP
A
12

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