Taco SR501 User Manual

Back of
Control
MENU ITEM
X – PUMP BLOCK
PATENT PENDING
XPB-1
U
L
Power: 120 V + 10%
50/60 Hz, 750 VA
Var. Speed: 120 V
(ac) 1 A
Pmp Relay: 120 V
(ac) 5 A, 1/6 hp
Use copper
conductors only
Meets Class B:
Canadian ICES
FCC Part 15
Com Sys
Ret
Boil
Out Heat
Dem
Boiler
H
N
C US
158033
Com Com
Sys
YRB
Man
R
System
Supply
Sensor
Heat
Source
Sensor
Outdoor
Sensor
Heat Source
Variable Speed Circulator
Heating: Heat Source Circulator
Snowmelt: System Circulator
Constant Speed Circulator
Heating: System Circulator
Snowmelt: Heat Source Circulator
Line Cord
To
Zone
Control
End Switch
or
Thermostat
(Relay or
Mechanical
Type)
Off-Enable On-Control
Boiler Operation
Sup
Var
Pump
Fuse
Front of
Control
Manual
Operation
Switch
X - Pump Block, Single Zone
Input from
Heat Source
Output to
System
HEAT
SOURCE
Supply
Sensor
Exp
Tank
Pressure
Relief
H
N
ComSup
Boil
Out Heat
Dem
Com ComSys
Ret
XPB
Back of Control
Off-Enable On-Control
Boiler Operation
Power
Cord
Thermostat
(Relay or Mechanical Type)
Pump
Outdoor
Sensor
Boiler
T
X - Pump Block (XPB)
FOR ADDITIONAL WIRING DIAGRAMS, PLEASE SEE www.taco-hvac.com/wiringwizard
59

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