Taco SR501 User Manual

Manufacturer Device or Series
Power Connections Output Contacts Remote Probes
Hot Neutral Common
To Burner
Circuit
To EWF’s LW
Terminal/Alarm
Probe
Probe
Preference
Taco LF & LT-1 Series H N COM NC NO P GND Taco LTA-2 & LN Series H N COM NC NO — — Taco LTR Series Red Wire White Wire Yellow Wire Yellow Wire — — — McDonnell & Miller
PS-801/851 (Older Models w/Red & Amber LEDs)
1 2 3 5 4 P or J2 Chassis GND
McDonnell & Miller
PS-801/851 (New Models w/Red & Green LEDs)
H N C B W J2 Chassis GND
McDonnell & Miller
PS-802/852 (Older Models w/Red & Amber LEDs)
H N C B W J7 Chassis GND
McDonnell & Miller
PS-802/852 (Older Models w/Red & Green LEDs)
H N C B W J3 Chassis GND
McDonnell & Miller Series 750 1 2 3 5 4 P Chassis GND McDonnell & Miller RB-122
H
(Black Wire)
N
(White Wire)
C
(Yellow Wire)
B
(Yellow Wire)
— — —
McDonnell & Miller RB-120 1 2 3 4 5 — — McDonnell & Miller RB-24 Red Wire White Wire Yellow Wire Yellow Wire — — — Hydrolevel 24 1 2 P1 P2 A — — Hydrolevel 170 H GN P1 P2 A — — Hydrolevel 1100 Red Wire White Wire Yellow Wire Yellow Wire — — — Hydrolevel 1150
H
(Black Wire)
N
(White Wire)
CUT-OFF
(Yellow Wire)
CUT-OFF
(Yellow Wire)
— — —
Hydrolevel
400, 500, 600, 700, 450, 550, 650, 750
1 2 P1 P2 A H3 Chassis GND
Hydrolevel
RW700 Series (Except RW700A1098)
L1 L2 — B A
2 Red Wires,
White Wire
Green Wire
Hydrolevel RW700A1098 T1 T2 — B A
2 Red Wires,
White Wire
Green Wire
Taco LTR, LN, LT-1, LTA-2 & LF Series Low Water Cutoff and Taco Electric Water Feeder Wiring Cross Reference
79

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