Taco Hot-LinkPlus User manual

Appli ation:
The Taco Hot-LinkPlus System for Domestic Hot Water
recirculation ensures instant hot water comfort at showers
and faucets. By supplying fresh hot water to the fixtures
while returning the “cooled” hot water back to the water
heater through the cold line, it also saves thousands of gal-
lons of wasted water per year. The average family can
achieve yearly savings of up to 12,000 gallons of water nor-
mally wasted down the drain while waiting for hot water.
High Quality Features:
The Hot-LinkPlus System includes a Taco Smart lus cir-
culator designed specifically for use with the Taco Hot-Link
Valve. The circulator and valve are suitable for most resi-
dential homes with hot water supply lines up to 100 feet.
The unique Hot-Link Valve is the key to the system. Made
of durable high temperature polymer, it creates an easy-to-
install return loop through the cold line from the furthest fix-
ture back to the water heater. An integral thermal sensor
disc closes when hot water reaches the valve. An internal
flow check prevents cold water from backing into the hot
line. Stainless steel braided flex hoses complete the instal-
lation.
Installing the Hot-LinkPlus System Cir ulator:
1. Follow all local plumbing and electrical codes when
installing the Hot-LinkPlus System.
2. Shut off cold water supply valve to water heater.
3. Open a hot water faucet in the house to drain the hot
water line.
4. Open water heater drain valve located at the bottom of
tank to drain remaining hot water from the lines. It is not
necessary to drain the entire tank.
5. Disconnect hot water supply line at water heater outlet
nipple.
6. Install the 3/4" female tailpiece union adapter provided
to the water heater outlet. Apply pipe dope or Teflon
tape to all male threads as required.
7. Install the 3/4" male tailpiece union adapter to the pump
outlet connection. Apply pipe dope or Teflon tape to all
male threads. Be sure flow arrow located on the pump
casing is in the proper direction. See diagram.
8. Install the stainless steel Hot-LinkPlus circulator by
connecting to the union nut/tailpiece attached to the
water heater outlet. Circulator motor must be in the hor-
izontal position.
9. Reconnect the hot water supply line to the union tail-
piece attached to the circulator discharge.
10. Open supply valve to water heater. Let water run until all
air is purged from lines. Check for any leaks. If leaks are
detected, close supply valve and tighten all connections.
11. Shut off open hot water faucet.
Instru tion Sheet
Hot-LinkPlus®System for Domesti Hot Water Re ir ulation
102-552
SU ERSEDES: NEW EFFECTIVE: November 28, 2017
lant ID# 001-5006
CAUTION: Do not run ir ulator dry. Permanent damage
may result and will void warranty.
CITY WATER
SUPPLY
Cold
Additional Hot-Link
Valve locations
Hot
Cold
Inlet
Water
Heater
HOT WATER LINE
A typical
installation
with a
Mixing Valve
SmartPlus
Circulator
COLD WATER LINE
ColdHot
The best location
is furthest xture
from hot water heater
Shut-O
Valve
Shut-O
Valve
1/2"
1/2"
Use (2) existing 3/8" x 1/2"
female to female ex lines
(2) new 1/2" x 1/2"
Taco® supplied ex lines
(female to female)
Hot-Link Valve includes (2)
plastic wall anchors
and screws
DIAGRAM IS FOR
REFERENCE ONLY
Sensor
SmartPlus
Circulator
DIAGRAM IS FOR
REFERENCE ONLY
Sensor
WARNING: To avoid ele tri al sho k, dis onne t the power
supply to the ir ulator and the main ele tri al unit.
WARNING: 1. Cir ulator must be installed on and supported by
the ir ulation piping.
2. The addition of unions on both the su tion and
dis harge side of the ir ulator is re ommended.
Figure 1:

Prepare the SmartPlus Circulator for Operation:
PUMP CONTROL OPTIONS
The Smart lus circulator has a “Mode Select” toggle switch
that allows for 2 operation modes. “ ulse” or “Smart” mode
can be selected using the toggle switch located on the elec-
tronic control board (see Figure 2). A yellow LED indicates
which mode is selected. All operation is automatic, no manual
timer or temperature setting is required.
• “Pulse” Mode
When set for “ ulse” operation, the
Smart lus will run for 1 to 10 minutes
“ON” and 10 minutes “OFF” to main-
tain hot water at all fixtures.
• “Smart” Mode
When set for “Smart” operation, the
Smart lus will run in “ ulse” mode
as above for the first 7 days. During
the first 7 days, the Smart lus will
monitor and record the home’s hot
water usage pattern. For the next 7 days, the Smart lus
will use the preceding week’s usage pattern to cycle the
pump. This process will be repeated every 7 days. The
pump will cycle for 1 hour before and after each recorded
hot water demand.
1. The Smart lus is shipped from the factory in “Smart”
mode. To switch the pump to “ ulse” mode, remove the
2 electrical box screws and cover. Change the position
of the toggle switch on the circuit board to “ ulse” (see
Figure 2). Replace the cover and secure with 2 screws.
2. lug the external temperature sensor provided into the
“TEM SENSOR” receptacle on the side of the electrical
box. Attach the sensor to the hot water supply pipe
downstream of the pump using the black zip-tie connec-
tor provided. See Figure 1.
3. lug the Smart lus circulator cord into the closest 110V
power outlet. The circulator will start in pulse mode and
operate for the programmed run time.
NOTE:The temperature sensor must be installed
and onne ted in either “Pulse” or “Smart” mode.
NOTE:The SmartPlus must be installed and sup-
ported by the ir ulation piping.
• Variable Run Time Setting
The Smart lus run time can be set for varying domestic
hot water pipe sizes and loop length. The factory default
setting is 3.
Follow the steps below to adjust the run time:
1. Make sure the Smart lus power cord is unplugged
from electrical outlet.
2. Remove the electrical box cover from the circulator
to expose the electronic control board.
3. Adjust the dial from 1 to 10
minutes to change the run
time to best fit your system.
NOTE: For the best possible
system performance, some
ad ustment may need to be
made to the dial position.
4. Replace the electrical box
cover.
5. lug Smart lus power cord
into electrical outlet. ump will start and run at the new
run time setting.
Other Spe ial Features of the SmartPlus:
• Va ation Fun tion - If no water usage is detected for 36
hours, the pump will remain off until hot water usage is
detected. Once detected, the pump will resume opera-
tion.
NOTE: If pump is set to “Smart” mode, the pump will
operate in “ ulse” mode for the first 7 days while record-
ing usage patterns.
•Exer ise Fun tion - While in vacation mode, the pump
will come operate every 7 days for 10 seconds to prevent
corrosion or scale buildup.
• 72 Hour Memory Backup -Should a power outage
occur, the Smart lus (in Smart mode only) will retain its
recorded settings and internal timer for 72 hours. When
power is restored, the Smart lus will return to its pro-
grammed mode setting, either “ ulse” or “Smart.”
• LED Indicator Lights - The Smart lus is provided with
3 LED’s located on the side of the electrical box.
Installing the Hot-Link Valve:
1. Select the hot water faucet furthest from the water
heater. If your plumbing system branches in two differ-
ent directions, another Hot-Link Valve may need to be
installed at the end of each run.
2. Shut off the hot and cold angle stop valves below the sink.
3. Open the hot and cold faucets to purge water from the
SMART
Figure 2:
Mode Select
CAUTION: Do not plug in the SmartPlus power ord until
the system is filled with water and purged of air.
WARNING: All lo al plumbing and ele tri al odes
should be followed when installing this produ t.
WARNING: Risk of ele tri al sho k. This pump is sup-
plied with a grounding ondu tor and grounding-type
atta hment plug. To redu e the risk of sho k, be ertain
that it is onne ted only to a properly grounded ground-
ing-type re epta le.
1
2
3
8
4
5
6
7
9
1
0
Green LED Illuminated: ower on
Yellow LED
Solid: ump in “Smart” mode.
Flashing: ump in “ ulse” mode.
Red LED
Off: Sensor is connected properly.
Flashes once every 5 seconds: Shorted sensor - Use
replacement sensor kit #194-3574.
Flashes twice every 5 seconds: Open sensor - Check all
sensor connections.
Flashes three times every 5 seconds: Blown fuse - Use
replacement fuse kit #26-813R .

lines.
4. Disconnect the hot and cold flex hoses from the 1/2"
faucet connections beneath the sink and reconnect
them to the respective hot and cold inlet ports on the
Hot-Link Valve. Locate the flow arrows on the side of
the valve to verify flow direction.
5. Install the 1/2" x 1/2" flex hoses provided. Connect one
hose to the hot outlet of the valve and the hot water
connection on the faucet (left side). Connect the second
flex hose to the cold outlet of the valve and the cold
water connection on the faucet (right side).
6. When all connections are made, open angle stop
valves and check for leaks.
7. Attach the Hot-Link Valve to the wall using anchor
screws provided.
Note: The Hot-Link Valve can be disassembled for service
and cleaning. Repeat steps number 2 and 3. Unthread the
valve stem from the body and clean internal screen of
debris. Reattach valve stem securely to prevent leaks.
Open angle stop valves and check for leaks.
Hot
Shut-O
Valve
Shut-O
Valve
1/2” Male
(2) New 1/2”x1/2”
Taco® supplied ex lines
(female x female)
Use (2) existing female
x female ex lines
1/2” Male
Hot-Link® includes (2)
plastic wall anchors
&screws
Cold
1/2”
3/8” Male 3/8” Male
1/2”
HOT COLD
Hot-LinkPlus Trouble Shooting
SYMPTOM POSSIBLE CAUSE SERVICE TIP
No Hot Water
Clogged filter screen.
• Close angle stop valves beneath sink.
• Open hot and cold faucets to drain line of
pressure.
• Remove valve stem, thoroughly clean
screen, replace, open angle stop valves
and check operation.
ump installed incorrectly. • Check to see if flow arrow on pump casing
is in correct direction.
ump not running.
• Check circuit breaker.
• Check power supply outlet.
• Check to ensure pump sensor is installed
correctly
• Check to ensure green LED on pump is on
Hoses connected incorrectly. • Check to see if flex hoses are connected to
proper Hot/Cold ports on valve.
Abundance of Hot Water in Cold
Line
Note: It is normal for some warm
water to be in cold line during recir-
culation cycle.
If unable to flush the hot water from the
cold line by running the cold faucet, it
may indicate that the valve is damaged.
• Replace valve.
Water is too Hot Hot-LinkPlus system has improved
delivery of hot water.
• Install mixing valve on water heater outlet.
See piping schematic on page 1.
CAUTION: Do not use pipe dope or Teflon tape on the
valve body threads.
CAUTION: Use aution when atta hing flex hoses to the
Hot-Link Valve to prevent ross-threading or stripping of
the threads.

LIMITED WARRANTY STATEMENT
Taco, Inc. will repair or replace without charge
(at the company’s option) any Taco 00 Series cir-
culator or circulator part which is proven defec-
tive under normal use within three (3) years from
the date of manufacture.
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 distribu-
tor. For assistance on warranty returns, the pur-
chaser may either contact the local Taco stock-
ing distributor or Taco. If the subject product or
part contains no defect as covered in this war-
ranty, the purchaser will be billed for parts and
labor charges in effect at time of factory exami-
nation 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 addi-
tion of petroleum-based fluids or certain chemi-
cal 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, 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
FITNESS IS IN EFFECT ONLY FOR THE DURA-
TION 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 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 conse-
quential damages, so these limitations or exclu-
sions may not apply to you.
A Taco Family Company
2017
®