Instruction Sheet - BlueRidge Company

Instruction Sheet
102-385
SR501-EXP-4 Switching Relay
SUPERSEDES: March 1, 2013
Plant ID# 9300-2872
EFFECTIVE: December 20, 2013
THERMOSTAT
Operation: When the thermostat calls for heat, the circulating pump
is energized and the isolated end switch (X and X) will start the boiler.
Priority Operation: When the priority dip switch is set to ON and the
zone is actuated, all other connected zoning panels will stop operation
until the zone is satisfied. When the priority dip switch is set to OFF
and the zone is actuated, all other connected zoning panels will operate independently.
Mode Operation: When the mode dip switch is set to NORMAL, the end
switch relay will be energized if any zone is in operation. When the mode
dip switch is set to RESET, the end switch relay will only be energized
through the operation of a plug-in reset control or closure of Priority Input.
Primary Pump Operation: When the dip switch is set to OFF, the primary circulating pump output will not energize when zone calls for
heat. When the dip switch is set to ON, the primary circulating pump
output will energize when zone calls for heat.
Post Purge Operation: When the dip switch is set to ON, the circulation pump output will stay energized for 2 minutes after its thermostat
or aquastat is satisfied, but not operate the boiler.
Priority Protection Operation: When the dip switch is set to ON and
the zone (priority) on master zone panel calls for heat continuously for
more than one hour, then power is returned to the space heating zones
allowing all the zones to function independently. Once the zone (priority) on master zone panel is satisfied, the control’s auto-reset is activated and the zone is again allowed to have priority for up to one hour.
Pump Exercise Operation: When the dip switch is set to ON, the solid
state timer cycles all the circulating pumps that are attached to the
Expandable Switching Relay at the selected time interval. The time
interval can be set for the pumps to run for either 30 seconds every 2
weeks or for 4 minutes every 24 hours.
End Switch: The switch closes when the thermostat calls for heat and
the mode switch is set to NORMAL. The end switch also closes when
the mode switch is set to RESET and a PC Series boiler reset power control is calling for heat.
Expansion Connections: Set the expansion switch to MASTER on the
switching relay that has the designated priority zone or is utilizing the
PC Series plug-in option. Set all other daisy chained controls to SLAVE.
Using thermostat wire (18-22 gauge) connect between terminals A, B,
C on the master control to the corresponding A, B, C on the SLAVE
control(s). Controls may be daisy chained up to 20 zoning panels using
any combination of -EXP controls (120 zones if all are 6 zone panels).
Thermostat Input (24 vac):
R
W
C
Hot side of transformer. Connect to R on thermostat.
Switched R signal from thermostat. Connect to W on thermostat.
Common side of transformer. Connect to COM on
thermostat (optional).
120 VAC Connections (N is Neutral, H is Hot):
Power Input
Connect 120 Volt AC power.
Primary
Primary Pump (optional)
N/O Zone
Circulator Zone
N/C Zone
Normally closed terminal for the Circulator Zone.
Will deactivate on a thermostat call.
Connect to pump neutral leads.
N
Specifications:
PRODUCT
NUMBER
NUMBER
OF ZONES
INPUT
VOLTAGE
MAXIMUM
COMBINED LOAD
SR501-EXP-4
1
120/60/1 VAC
12 amps
TYPE 1 ENCLOSURE
WIDTH
HEIGHT
DEPTH
47/8"
65/8"
23/8"
All circulator relay connections, including ZC/ZR, are rated 1/3 hp (6 FLA, 36 LRA) at 120 VAC.
The end switch connection is rated 24 VAC, 1 amp.
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 damage. 12-18 gauge wire recommended for
120 VAC connections, 14-22 gauge wire for thermostat connections, and 14-22
gauge wire for 24 VAC source connections.
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 left or go
to our website: http://www.taco-hvac.com.
Wiring Diagram:
T
See NOTE
TO: DHW Aquastat if PC700
Boiler Reset is installed.
(See Page 2.)
TO: "TT" on Boiler Aquastat
POWER
CONTROLS
END
SWITCH
EXPANSION
THERMOSTAT
RESET
OVERRIDE
X X A B C R W C 1 2
MASTER
SLAVE
24 VOLTS AC ONLY
OFF
PRIORITY ON
NORMAL
RESET
PRIMARY PUMP ON
OFF
POST PURGE ON
PRIORITY PROTECT ON
PUMP EXERCISE ON
OFF
OFF
OFF
30 SEC/2 WK
ACCESSORY
PORT
LED
INDICATORS
4 MIN/24 HOUR
POWER
FUSE
6 AMP
NOTE: Resistor (1KΩ, 1⁄2 W)
may be needed between
W and C terminals.
ZONE 1
FUSE
6 AMP
SINGLE ZONE
EXPANDABLE SWITCHING RELAY
SR 501-EXP-4
N/O N/C H
N
H
PRIMARY
INPUT
120 VAC
CIRCULATOR OUTPUT 120 VAC
CIRCULATOR
PRIMARY
CIRCULATOR
(OPTIONAL)
120 VAC
INPUT
Dip Switch Settings:
SLAVE
ZONE PRIORITY ON
RESET
PRIMARY PUMP FUNCTION ON
POST PURGE ON
PRIORITY PROTECTION ON
PUMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
NORMAL
OFF
OFF
OFF
OFF
4 MIN/24 HOUR
Troubleshooting:
• Problem: 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 (common) terminals 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.
8the batteries are fresh and installed correctly.
• Problem: 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.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
SR501-EXP and PC700 Boiler Reset Control Connected to an Existing Switching Relay
OUTDOOR
SENSOR
A
Note: If Zone Control comes on without a call for heat,
reverse Reset Override input (1 & 2) wires on SR501-EXP.
AQUASTAT ON
DHW HEATER
TO: "TT" ON BOILER
AQUASTAT
PC700
BOIL OUT
SEN SEN
ZONE
CONTROL
THERMOSTATS
EXISTING
ZONE
CONTROL
MASTER
POWER
CONTROLS
END
SWITCH
EXPANSION
THERMOSTAT
RESET
OVERRIDE
X X A B C R W C 1 2
BOILER SENSOR
SLAVE
MASTER
X X
24 VOLTS AC ONLY
R
W R
W R
R
W
W
ISOLATED ZONE 1 ZONE 2 ZONE 3 ZONE 4
END
SWITCH THERMOSTATS (24 VAC) PRIORITY
OFF
PRIORITY ON
T
ZONE 4
PRIORITY
ON
OFF
LED
INDICATORS
NORMAL
RESET
PRIMARY PUMP ON
OFF
POST PURGE ON
PRIORITY PROTECT ON
PUMP EXERCISE ON
OFF
OFF
OFF
ACCESSORY
PORT
ZONE 1
FUSE
6 AMP
POWER
FUSE
6 AMP
POWER
LED
INDICATORS
4 MIN/24 HOUR
30 SEC/2 WK
FOUR ZONE SWITCHING RELAY
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
ZONE 2
ZONE 3
ZONE 1
FUSE
6 AMP
FUSE
6 AMP
ZONE 4
120 VAC 120 VAC CIRCULATORS PRIORITY INPUT
ZC
H
SINGLE ZONE
EXPANDABLE SWITCHING RELAY
ZR
H
ZONE1 ZONE2 ZONE3 ZONE4
N H N H N H N H
120 VAC
N
H
SR 504-4
SR 501-EXP-4
N/O N/C H
N
H
PRIMARY
INPUT
120 VAC
CIRCULATOR OUTPUT 120 VAC
JUMPER
DHW
HEATER
CIRCULATOR
CIRCULATOR
120 VAC
INPUT
H
BOILER
N
PRIMARY
CIRCULATOR
(OPTIONAL)
For additional wiring diagrams, see www.taco-hvac.com.
Replacement Switching Relay fuses part number: SR6A-001RP
Optional power stealing thermostat resistor part number: SRTR-001RP
(Manufacture: Littlefuse, Part Number: 229006)
(Value: 1000 Ohms, 1/2 watt or higher)
LIMITED WARRANTY STATEMENT
Taco, Inc. will repair or replace without charge
(at the company’s option) any product or part
which is proven defective under normal use
within three (3) years from the date of start-up or
three (3) years and six (6) months from date of
shipment (whichever occurs first).
In order to obtain service under this warranty, it
is the responsibility of the purchaser to promptly
notify the local Taco stocking distributor or Taco
in writing and promptly deliver the subject product or part, delivery prepaid, to the stocking distributor. For assistance on warranty returns, the
purchaser may either contact the local Taco
stocking distributor or Taco. If the subject product or part contains no defect as covered in this
warranty, the purchaser will be billed for parts
and labor charges in effect at time of factory
examination and repair.
Any Taco product or part not installed or operated in conformity with Taco instructions or which
has been subject to misuse, misapplication, the
addition of petroleum-based fluids or certain
chemical additives to the systems, or other
abuse, will not be covered by this warranty.
If in doubt as to whether a particular substance
is suitable for use with a Taco product or part, or
for any application restrictions, consult the
applicable Taco instruction sheets or contact
Taco at [401-942-8000].
Taco reserves the right to provide replacement
products and parts which are substantially similar in design and functionally equivalent to the
defective product or part. Taco reserves the right
to make changes in details of design, construction, or arrangement of materials 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 SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES RESULTING FROM THE
USE OF ITS PRODUCTS OR ANY INCIDENTAL
COSTS OF REMOVING OR REPLACING
DEFECTIVE PRODUCTS.
This warranty gives the purchaser specific
rights, and the purchaser may have other rights
which vary from state to state. Some states do
not allow limitations on how long an implied warranty lasts or on the exclusion of incidental or
consequential damages, so these limitations or
exclusions may not apply to you.
CONTROLS MADE EASY.®
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: (401) 942-8000 FAX: (401) 942-2360.
TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: 905/564-9422. FAX: 905/564-9436.
Visit our web site at: http://www.taco-hvac.com
Printed in USA
Copyright 2013
TACO, Inc.
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