Install Instructions

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 prod-
uct or part, delivery prepaid, to the stocking dis-
tributor. For assistance on warranty returns, the
purchaser may either contact the local Taco
stocking distributor or Taco. If the subject prod-
uct 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 operat-
ed 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 simi-
lar in design and functionally equivalent to the
defective product or part. Taco reserves the right
to make changes in details of design, construc-
tion, 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 STATU-
TORY, OR ANY OTHER WARRANTY OBLIGA-
TION 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 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 war-
ranty lasts or on the exclusion of incidental or
consequential damages, so these limitations or
exclusions may not apply to you.
LIMITED WARRANTY STATEMENT
BOILER
SWITCH SETTINGS
Master/Slave: Slave
Reset/Normal: Normal
Priority Zone: Off
120 VAC
INPUT
H
N
SWITCH SETTINGS
Master/Slave: Master
Reset/Normal: Normal
Priority Zone: On
TO: "TT" ON BOILER
PRIMARY
CIRCULATOR
(OPTIONAL)
TO: "TT" ON BOILER WITH
DHW "TT" INPUT
MASTER
P
RIMARY
CIRCULATOR
(OPTIONAL)
SLAVE
T
HERMOSTATS
T
S
IX ZONE
EXPANDABLE
S
WITCHING RELAY
POWER
C
ONTROLS
120 VAC CIRCULATORS
Z
C
INPUT
120 VAC
ZONE 1 ZONE 2 ZONE 3 ZONE 4 ZONE 5 ZONE 6
Z
ONE1
Z
ONE2
Z
ONE3
Z
ONE4
Z
ONE5
SR 506-EXP-4
F
USE
6
AMP
FUSE
6
AMP
F
USE
6
AMP
FUSE
6
AMP
F
USE
6
AMP
F
USE
6
AMP
FUSE
6
AMP
FUSE
6
AMP
NET
EXPANSIONMAIN PRIORITY
XX
XX
AB
CRW
CRW
CRW
CRW
CRW
CRW
C
12
E
ND SWITCH THERMOSTATS (24 VAC)
PRIORITY
N/C
P
RIMARY
120 VAC
Z
R
HHNHNHNHNHNHNHNHNH NH
SLAVE
PRIORITY ON
RESET
PRIMARY PUMP ON
POST PURGE ON
PRIORITY PROTECT ON
P
UMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
OFF
OFF
OFF
O
FF
N
ORMAL
LOW LIMIT (ZC) ON OFF
4 MIN/24 HOUR
Z
ONE6 ZONE6
PRIORITY
A
CCESSORY
P
ORT
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
ZONE 5
ZONE 6
LED
INDICATORS
THERMOSTATS
T
FOUR ZONE
EXPANDABLE
SWITCHING RELAY
P
OWER
CONTROLS
1
20 VAC CIRCULATORS
ZC
INPUT
120 VAC
ZONE 1 ZONE 2 ZONE 3 ZONE 4
ZONE1 ZONE2 ZONE3
SR 504-EXP-4
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
NET
EXPANSIONMAIN PRIORITY
XX
XX
AB
CRW
CRW
CRW
CRW
C
12
END SWITCH THERMOSTATS (24 VAC)
PRIORITY
N/C
PRIMARY
120 VAC
ZR
H
HNHNHNHNHNHNH NH
SLAVE
PRIORITY ON
R
ESET
PRIMARY PUMP ON
POST PURGE ON
PRIORITY PROTECT ON
P
UMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
OFF
OFF
OFF
O
FF
NORMAL
L
OW LIMIT (ZC) ON OFF
4 MIN/24 HOUR
ZONE4 ZONE4
P
RIORITY
ACCESSORY
PORT
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
LED
INDICATORS
2 Expandable Switching Relays Connected Together
SLAVE
ZONE PRIORITY ON
RESET
PRIMARY PUMP FUNCTION ON
P
OST PURGE ON
PRIORITY PROTECTION ON
P
UMP EXERCISE ON
3
0 SEC/2 WK
MASTER
OFF
NORMAL
OFF
O
FF
OFF
O
FF
4
MIN/24 HOUR
L
OW LIMIT (ZC) ON
O
FF
Dip Switch Settings:
T
his 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.
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) 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.
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 ther-
mostat wiring for errors.
CONTROLS MADE EASY.
®
TACO, INC., 1160 Cranston Street, Cranston, RI 02920 Telephone: [phone] FAX: [phone].
TACO (Canada), Ltd., 8450 Lawson Road, Unit #3, Milton, Ontario L9T 0J8. Telephone: [phone]. FAX: [phone].
Visit our web site at: http://www.taco-hvac.com
Printed in USA
Copyright 2013
TACO, Inc.
NOTE: Resistor (1KΩ,
1
⁄
2
W) may be needed
between W and C terminals.
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)