Taco SR501-4 User manual

SR 501-4
NH3 4 4 56 6
N/O N/ON/C N/CCOM COM
120 VAC
INPUT
TT
COM
RW
24
VAC
TO: 120 VAC POWER CIRCULATOR
TO: ZC
THERMOSTAT
TO: ZR
ONE ZONE
SWITCHING RELAY
FUSE
6 AMP
POWER
ZONE 1
LED
INDICATORS
FUSE
6AMP
NOTE 1: Resistor
(1KΩ, 1⁄2W)
may be needed
between Wand C
terminals.
See
NOTE 1
TACO SR501-4 REPLACEMENT CROSS-REFERENCE
MANUFACTURER MODEL CONNECTIONS
Taco SR501-4 HN3 4 NO 4 NC 5 6 NO 6 NC R/T W/T C
Argo AR821 1 2 3 4 6 T
AR822 L1 L2 3 4 NO 4 NC 6 NO 6 NC R/T G/T C
Colombus MR10 L1 L2 3 4 NO 4 NC 6 NO 6 NC R/T G/T C
Erie SR100 L1 N3 4 NO 4 NC 6 NO 6 NC R/T G/T C
Honeywell RA89A 1234 T T
RA832A 1234 XX T T
R84 A 1 2 3 4 6 T T
White-Rogers 889-189 1234 T T
829-84 1 2 3 4 6 T T
Features:
External Indicator Lights
Universal Replaceability
Snap-in PC Board
Simplified Wiring
Sealed Relays
Fuse Protected Outputs
100% Factory Tested
Contractor Friendly PC Board Layout
Universal Thermostat Compatibility
UL Approved
Extended 3 Year Warranty
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 N
and H.
Ju per Place ent:
The jumper is factory installed between ter-
minals H and 3 to switch power on terminals
4 n/o and 4 n/c.
Ter inal Description:
T & T Thermostat Connection
COM Common side of transformer, to power some
setback thermostats
N Neutral wire of power input
H Hot wire of power input
3 Common terminal for 4 n/o and 4 n/c
4 n/o Normally open terminal
4 n/c Normally closed terminal
6 n/c Normally closed terminal
6 n/o Normally open terminal
5 Common terminal for 6 n/o and 6 n/c
Alternative
Wiring:
ONE ZONE
SWITCHING RELAY
SR 501-4
FUSE
6 AMP
POWER
ZONE 1
LED
INDICATORS
FUSE
6 AMP
NH3 4 4 56 6
N/O N/ON/C N/CCOM COM
120 VAC
INPUT
TT
COM
RW
24
VAC
TO: 120 VAC POWER
CIRCULATOR
JUMPER
TO: TT ON
BOILER
THERMOSTAT
See
NOTE 1
Instruction Sheet
SR501-4 Switching Relay
102-375
SUPERSEDES: March 1, 2013 EFFECTIVE: D c mb r 20, 2013
Plant ID# 9300-2865
NOTE 2: 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 instruc-
tions 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 INPUT MAXIMUM TYPE 1 ENCLOSURE
NUMBER OF ZONES VOLTAGE COMBINED LOAD WIDTH HEIGHT DEPTH
SR 01-4 1 120/60/1 VAC 12 amps 47/8"6
/8"2 3/8"
All circulator relay connections, including ZC/ZR, are rated 1/3hp (6 FLA, 36 LRA) at 120 VAC.
The thermostat connection supplies a 24 VAC class 2 output.
WARNING: Wiring connections must be made in accordance with all
applicable electrical codes. Use copper wire only. 120 VAC wiring must
have a minimum temperature rating of 75°C. Failure to follow this
instruction can result in personal injury or death and/or property dam-
age. 12-1 gauge wire recommended for 120 VAC connections, 14-22
gauge wire for thermostat connections, and 14-22 gauge wire for 24
VAC source connections.
Typical
Wiring:
This device complies with part 1 of the FCC Rules. Operation is subject to the following two con-
ditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Troubleshooting:
• Proble : Digital thermostats do not work correctly when connected
to a switching relay.
• Solution: Some thermostats are a “Power Stealing” type which means
they are powered by the switching relay with just 2 wires (R& W). A
resistor may be needed in order to have the thermostat work properly.
This resistor should be placed between the W& C(co on) termi-
nals of the switching relay. If the thermostat manufacturer does not
supply a resistor, a 1000 ohm ½ watt resistor has proven to work with
most models and is readily available at electronic supply outlets (e.g.
Radio Shack). If the thermostat is battery powered, then check that the
batteries are fresh and installed correctly.
• Proble : No heat in a zone or room of building.
• Solution: LED diagnostic lights will help find a component that is not
working properly. The green LED should always be on, indicating that
power is connected and the solid-state fuse is good. When there is a
call for heat, the red LED will come on indicating power to the zone
circulator. This indicates the thermostat is working correctly. If the red
LED does not come on, then check the thermostat and thermostat
wiring for errors.
For information on Taco’s Switching Relays (SR)
including catalog sheet, instruction sheets, Visio
stencils and our highly praised Zone Controls
Wiring Guide, scan the QR code to the right or go to
our website: http://www.taco-hvac.com.

Taco, Inc. will r pair or r plac without charg
(at th company’s option) any product or part
which is prov n d f ctiv und r normal us
within thr (3) y ars from th dat of start-up or
thr (3) y ars and six (6) months from dat of
shipm nt (which v r occurs first).
In ord r to obtain s rvic und r this warranty, it
is th r sponsibility of th purchas r to promptly
notify th local Taco stocking distributor or Taco
in writing and promptly d liv r th subj ct prod-
uct or part, d liv ry pr paid, to th stocking dis-
tributor. For assistanc on warranty r turns, th
purchas r may ith r contact th local Taco
stocking distributor or Taco. If th subj ct prod-
uct or part contains no d f ct as cov r d in this
warranty, th purchas r will b bill d for parts
and labor charg s in ff ct at tim of factory
xamination and r pair.
Any Taco product or part not install d or op rat-
d in conformity with Taco instructions or which
has b n subj ct to misus , misapplication, th
addition of p trol um-bas d fluids or c rtain
ch mical additiv s to th syst ms, or oth r
abus , will not b cov r d by this warranty.
If in doubt as to wh th r a particular substanc
is suitabl for us with a Taco product or part, or
for any application r strictions, consult th
applicabl Taco instruction sh ts or contact
Taco at [401-942-8000].
Taco r s rv s th right to provid r plac m nt
products and parts which ar substantially sim-
ilar in d sign and functionally quival nt to th
d f ctiv product or part. Taco r s rv s th
right to mak chang s in d tails of d sign, con-
struction, or arrang m nt of mat rials of its
products without notification.
TACO OFFERS THIS WARRANTY IN LIEU OF
ALL OTHER EXPRESS WARRANTIES. ANY
WARRANTY IMPLIED BY LAW INCLUDING
WARRANTIES OF MERCHANTABILITY OR FIT-
NESS IS IN EFFECT ONLY FOR THE DURATION
OF THE EXPRESS WARRANTY SET FORTH IN
THE FIRST PARAGRAPH ABOVE.
THE ABOVE WARRANTIES ARE IN LIEU OF
ALL OTHER WARRANTIES, EXPRESS OR
STATUTORY, OR ANY OTHER WARRANTY
OBLIGATION ON THE PART OF TACO.
TACO WILL NOT BE LIABLE FOR ANY SPE-
CIAL, INCIDENTAL, INDIRECT OR CONSE-
QUENTIAL DAMAGES RESULTING FROM THE
USE OF ITS PRODUCTS OR ANY INCIDENTAL
COSTS OF REMOVING OR REPLACING
DEFECTIVE PRODUCTS.
This warranty giv s th purchas r sp cific
rights, and th purchas r may hav oth r rights
which vary from stat to stat . Som stat s do
not allow limitations on how long an impli d
warranty lasts or on th xclusion of incid ntal
or cons qu ntial damag s, so th s limitations
or xclusions may not apply to you.
LIMITED WARRANTY STATEMENT
BOILER
TO: "TT" ON BOILER
H
N
DHW
CIRCULATOR
120 VAC INPUT
AQUASTAT ON
DHW HEATER
A
MASTER
SLAVE
REMOVE
JUMPER
PRIORITY OFF
SR 501-4
NH344 56 6
N/O N/ON/C N/CCOM COM
120 VAC
INPUT
TT
COM
RW
24
VAC
JUMPER
120 VAC INPUT
FOUR ZONE SWITCHING RELAY
120 VAC CIRCULATORS
ZC
INPUT
120 VAC
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE1 ZONE2 ZONE3
THERMOSTATS
SR 504-4
FUSE
6 AMP
FUSE
6AMP
FUSE
6AMP
FUSE
6 AMP
FUSE
6 AMP
XX RWRW
RWRW
ISOLATED
END
SWITCH THERMOSTATS (24 VAC)
PRIORITY
120 VAC
ZR
HHNHNHNHNH NH
ZONE4
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
LED
INDICATORS
ZONE 4
PRIORITY
OFF
ON
PRIORITY
FUSED
COM
SLAVE
REMOVE
JUMPER
PRIORITY OFF
FOUR ZONE SWITCHING RELAY
120 VAC CIRCULATORS
ZC
INPUT
120 VAC
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE1 ZONE2 ZONE3
THERMOSTATS
SR 504-4
FUSE
6AMP
FUSE
6AMP
FUSE
6AMP
FUSE
6AMP
FUSE
6AMP
XX RW RW
RW
RW
ISOLATED
END
SWITCH THERMOSTATS (24 VAC)
PRIORITY
120 VAC
ZR
HHNHNHNHNH NH
ZONE4
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
LED
INDICATORS
ZONE 4
PRIORITY
OFF
ON
PRIORITY
FUSED
COM
120 VAC INPUT
ONE ZONE
SWITCHING RELAY
FUSE
6AMP
POWER
ZONE 1
LED
INDICATORS
FUSE
6 AMP
SR501 Switching Relay Controlling 2 SR504/506 Switching Relays
Do it Once. Do it Right.®
TACO, INC., 1160 Cranston Str t, Cranston, RI 02920 T l phon : [phone] FAX: [phone].
TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. T l phon : 905/564-9422. FAX: [phone].
Vi it our web ite at: http://www.taco-hvac.com
Print d in USA
Copyright 2013
TACO, Inc.
Optional power stealing thermostat resistor part number: SRTR-001RP
(Value: 1000 Ohms, 1/2 watt or higher)
Replacement Switching Relay fuses part number: SR6A-001RP
(Manufacture: Littlefuse, Part Number: 229006)