Instruction Sheet - Sr501-845Rp Universal Replacement Relay - Taco SR501 Wiring Manual

Features:
Universal Replaceability
Indicator Lights
Snap-in PC Board to Existing Enclosure
Simplified Wiring
Fully Enclosed Snap-Out Relay
100% Factory Tested
Universal Thermostat Compatibility
UL Approved
Extended 3 Year Warranty
Made in the USA
Operation:
Connect a thermostat to the "T T" terminals on
the switching relay. When the thermostat calls for
heat, the relay is energized and power is given to
the circulator.
Power Input:
Connect 120 volt ac power to terminals L1 and L2.
Jumper Placement:
The jumper is factory installed between terminals
L1 and 3 to switch power on terminal 4.
Diagnostics:
The Indicator lights show full functionality of the
switching relay. The green light should always be
on, indicating that power is connected. When the
thermostat calls for heat, both the appropriate cir-
culator and red indicating light is energized.
The Taco Connection:
Combine the reliability of the Taco Zone Valves,
Priority Zoning Circulators, Thermostats, and the
"00" family of circulators with the advanced features
of the Taco Zone Controls to achieve total system
integration. No matter the application, Taco now pro-
vides the products to maximize system performance
while simplifying both installation and service.
Terminal Description:
T & T Thermostat Connection
L2 Neutral wire of power input
L1 Hot wire of power input
3 Common terminal for 4
4 Normally open terminal
6 Normally open terminal
5 Common terminal for 6
Do it Once. Do it Right.
TACO, INC., 1160 Cranston Street, Cranston, RI 02920
TACO (Canada), Ltd., 6180 Ordan Drive, Mississauga, Ontario L5T 2B3.
Visit our web site at: http://www.taco-hvac.com
88
Instruction Sheet
SR501-845RP Universal Replacement Relay
Typical
Wiring
UNIVERSAL REPLACEMENT RELAY
MODEL: SR501-845RP
120 VAC
INPUT
L2 L1 3 4 5 6
TO: 120 VAC POWER
Note: When using Alternative Wiring diagram, the boiler operating control's
ZC terminal will see the load of the circulator(s).
Warning: When using Alternative Wiring diagram, wiring instructions must
be followed so power originates from the boiler aquastat. Failure to follow
these wiring instructions may result in a secondary source of power being
connected to the boiler that may activate it under certain circumstances,
causing injury or death.
Specifications:
PRODUCT
NUMBER
SR501-845RP
All Switching Relays are relay type DPDT, have a thermostat current of .18, and have a single phase
motor rating per zone of 1/3 hp (7.2A) @ 120 VAC.
MANUFACTURER MODEL
Taco
Argo
Colombus
Erie
Honeywell
White-Rogers
Warning: Wiring connections must be made in accordance with all applicable elec-
trical codes and these instructions. Use copper wire only. Failure to follow this
instruction can result in personal injury or death and/or property damage. 10-18
gauge wire recommended for 120 VAC connections with 9 in.lbs. max torque, 12-22
gauge wire for thermostat connections with 9 in.lbs. max torque, and 12-22 gauge
wire for 24 VAC source with 5 in.lbs. max torque.
®
Telephone: (401) 942-8000
Telephone: 905/564-9422.
THERMOSTAT
R W
T T
POWER
T STAT
TO: TT ON BOILER
CIRCULATOR
JUMPER
TO: 120 VAC POWER
NUMBER TRANSFORMER MAXIMUM
OF ZONES VOLTAGE COMBINED LOAD
1 Zone 120 VAC Input 7.2 amps
TACO SR501-845RP REPLACEMENT CROSS-REFERENCE
SR501-845RP L1 L2
AR821 1 2
AR822 L1 L2
MR10 L1 L2
SR100 L1 L2
RA89A 1 2
RA832A 1 2
R845A 1 2
889-189 1 2
829-845 1 2
FAX: (401) 942-2360.
FAX: 905/564-9436.
Alternative
THERMOSTAT
Wiring
R W
T T
POWER
UNIVERSAL REPLACEMENT RELAY
T STAT
MODEL: SR501-845RP
120 VAC
INPUT
L2 L1 3 4 5 6
TO: ZC
TO: ZR
CIRCULATOR
DIMENSIONS OF ENCLOSURE
WIDTH HEIGHT DEPTH
4 1/4" 5 1/4" 2 3/4"
CONNECTIONS
3 4 5 6 R/T W/T
3 4 5 6 T
3 4 NO 5 6 NO R/T G/T
3 4 NO 5 6 NO R/T G/T
3 4 NO 5 6 NO R/T G/T
3 4 T T
3 4 X X T T
3 4 5 6 T T
3 4 T T
3 4 5 6 T T
Printed in USA
Copyright 2005
TACO, Inc.