Instruction Manual
Laing Thermotech ACT-4
wireless Potable Hot Water
Recirculation Kit
Table of Contents
Introduction and Safety................................................................................................ 2
Introduction............................................................................................................... 2
Safety.......................................................................................................................... 2
Safety terminology and symbols........................................................................2
User safety.............................................................................................................3
Environmental safety............................................................................................4
Product Description...................................................................................................... 6
General description..................................................................................................6
Operational
Installation...................................................................................................................... 9
Preinstallation............................................................................................................ 9
Recommended installation....................................................................................10
Install the pump...................................................................................................... 11
Install the valve........................................................................................................12
Commissioning, Startup, Operation, and Shutdown............................................. 15
Thermostat controlled operation..........................................................................15
Thermostat controlled operation Plus Timer...................................................... 15
Optional Push-Button / Signal Repeater..............................................................17
specifications.......................................................................................6
Table of Contents
Maintenance................................................................................................................ 19
Valve and pump inspection...................................................................................19
Pairing after pump or valve replacement............................................................ 19
Replace the batteries..............................................................................................19
Return to service after shutdown of two weeks or more................................... 20
Troubleshooting..........................................................................................................21
LED codes................................................................................................................21
Operation troubleshooting................................................................................... 21
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
1
Introduction and Safety
Introduction and Safety
Introduction
Purpose of this manual
The purpose of this manual is to provide necessary information for:
• Installation
• Operation
• Maintenance
CAUTION:
Read this manual carefully before installing and using the product. Improper
use of the product can cause personal injury and damage to property, and may
void the warranty.
NOTICE:
Save this manual for future reference, and keep it readily available at the
location of the unit.
Safety
WARNING:
• The operator must be aware of safety precautions to prevent physical
injury.
• Any pressure-containing device can explode, rupture, or discharge its
contents if it is over-pressurized. Take all necessary measures to avoid
over-pressurization.
• Operating, installing, or maintaining the unit in any way that is not covered
in this manual could cause death, serious personal injury, or damage to the
equipment. This includes any
not provided by Xylem. If there is a question regarding the intended use of
the equipment, please contact a Xylem representative before proceeding.
• Do not change the service application without the approval of an
authorized Xylem representative.
modification to the equipment or use of parts
CAUTION:
You must observe the instructions contained in this manual. Failure to do so
could result in physical injury, damage, or delays.
Safety terminology and symbols
About safety messages
It is extremely important that you read, understand, and follow the safety
messages and regulations carefully before handling the product. They are
published to help prevent these hazards:
• Personal accidents and health problems
• Damage to the product
• Product malfunction
2 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
Hazard levels
Hazard level Indication
DANGER:
A hazardous situation which, if not avoided, will
result in death or serious injury
Introduction and Safety
NOTICE:
Hazard categories
Hazard categories can either fall under hazard levels or let specific symbols
replace the ordinary hazard level symbols.
Electrical hazards are indicated by the following specific symbol:
Electrical Hazard:
These are examples of other categories that can occur. They fall under the
ordinary hazard levels and may use complementing symbols:
• Crush hazard
• Cutting hazard
• Arc flash hazard
User safety
General safety rules
These safety rules apply:
• Always keep the work area clean.
• Pay attention to the risks presented by gas and vapors in the work area.
• Avoid all electrical dangers. Pay attention to the risks of electric shock or
• Always bear in mind the risk of drowning, electrical accidents, and burn
Safety equipment
Use safety equipment according to the company regulations. Use this safety
equipment within the work area:
• Hard hat
• Safety goggles, preferably with side shields
• Protective shoes
flash hazards.
arc
injuries.
WARNING:
CAUTION:
A hazardous situation which, if not avoided, could
result in death or serious injury
A hazardous situation which, if not avoided, could
result in minor or moderate injury
• A potential situation which, if not avoided,
could result in undesirable conditions
• A practice not related to personal injury
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
3
Introduction and Safety
• Protective gloves
• Gas mask
• Hearing protection
• First-aid kit
• Safety devices
NOTICE:
Never operate a unit unless safety devices are installed. Also see specific
information about safety devices in other chapters of this manual.
Electrical connections
Electrical connections must be made by certified electricians in compliance with
all international, national, state, and local regulations. For more information
about requirements, see sections dealing specifically with electrical
connections.
Precautions before work
Observe these safety precautions before you work with the product or are in
connection with the product:
• Provide a suitable barrier around the work area, for example, a guard rail.
• Make sure that all safety guards are in place and secure.
• Make sure that you have a clear path of retreat.
• Make sure that the product cannot roll or fall over and injure people or
damage property.
• Make sure that the lifting equipment is in good condition.
• Use a lifting harness, a safety line, and a breathing device as required.
• Allow all system and pump components to cool before you handle them.
• Make sure that the product has been thoroughly cleaned.
• Disconnect and lock out power before you service the pump.
• Check the explosion risk before you weld or use electric hand tools.
Wash the skin and eyes
Follow these procedures for chemicals or hazardous
into contact with your eyes or your skin:
Condition Action
Chemicals or hazardous
fluids in eyes
Chemicals or hazardous
fluids on skin
fluids that have come
1. Hold your eyelids apart forcibly with your fingers.
2. Rinse the eyes with eyewash or running water for at least
15 minutes.
3. Seek medical attention.
1. Remove contaminated clothing.
2. Wash the skin with soap and water for at least 1 minute.
3. Seek medical attention, if necessary.
Environmental safety
The work area
Always keep the station clean.
Waste and emissions regulations
Observe these safety regulations regarding waste and emissions:
• Appropriately dispose of all waste.
• Handle and dispose of the processed liquid in compliance with applicable
environmental regulations.
4 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
• Clean up all spills in accordance with safety and environmental
procedures.
• Report all environmental emissions to the appropriate authorities.
WARNING:
Radiation Hazard. Do NOT send the product to Xylem if it has been exposed to
any nuclear radiation.
Electrical installation
For electrical installation recycling requirements, consult your local electric
utility.
Recycling guidelines
Always follow local laws and regulations regarding recycling.
FCC Statement (United States Only)
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.
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Consult the dealer or an experienced radio/TV technician for help.
Changes or
responsible for compliance could void the user’s authority to operate the
equipment.
Certifications
CSA Certified: NSF/ANSI-372 Compliant
Industry Canada RSS Statement (Canada Only)
This device complies with Industry Canada licence-exempt RSS standard(s).
Operation is subject to the following two conditions: (1) this device may not
cause interference, and (2) this device must accept any interference, including
interference that may cause undesired operation of the device.
modifications not expressly approved by the manufacturer
Introduction and Safety
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
5
Product Description
Product Description
General description
The ACT-4 wireless is a potable hot water recirculation kit for use in new and
retrofit domestic hot water systems. The kit helps to:
• Improve comfort through instant hot water
• Save energy
• Conserve water
Parts included in kit
• Pump with a built-in timer
• 6 ft (1.8 m) power cord
• Under-sink mixing valve with transmitter/receiver
• Two 1.5V LR06 AA Batteries
• Valve mounting bracket
• Two screws
• Installation, Operation, and Maintenance Manual (IOM)
Additional parts needed for install
• (2) 3/8" Compression x 1/2" stainless steel
• (2) 1/2" x 1/2" stainless steel
• Hand tools including various wrenches and #0 and #2 Phillips Head
screwdrivers
• (1) 3/4" Isolation shut-off valve and associated adapters and nipples
(optional - if pump desired to be isolated for maintenance)
Verify the type of 1/2" connection that may be required for the stainless steel
flex hoses: Compression or NPT/IPS.
flex hoses (optional)
flex hoses
Operational
Operational limits
6 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
specifications
Pump and valve
Operating medium Water
Maximum working pressure 145 PSI (10 bar)
Minimum operating differential pressure (Valve) 1.6 PSI (0.11 bar)
Maximum water temperature 203°F (95°C)
Motor 115 V, 1 PH, 60 Hz, 20 Watts input, 0.3 Amps,
4800 RPM
Operating noise level 30 dB
Battery power 1.5 V each
Estimated battery life 2 Years
Maximum operating range 150 ft (45 m)
Manual
WARNING:
Do NOT exceed the maximum working pressure of the pump. This information
is listed on the nameplate of the pump.
WARNING:
California Proposition 65 warning! This product contains chemicals known to
the state of California to cause cancer and birth defects or other reproductive
harm.
How the system works
The ACT–4 wireless potable hot water recirculation kit features a factory paired
pump and mixing valve that wirelessly communicate temperature data and
operational status between each other. The ACT–4 wireless pump with built-in
timer is installed on the supply side of the hot water source, as presented below.
The paired mixing valve is installed under the sink farthest from the hot water
source. A temperature sensor within the valve detects the water temperature
and wirelessly transmits this data to the pump.
The desired water temperature at the mixing valve is set remotely with the
thermostat dial on the pump. When the water temperature sensed at the valve
is below the desired setting, a signal is sent to the ACT–4 wireless pump to
begin circulating hot water throughout the system. The mixing feature of the
valve tempers the cold water at the faucet or tap, providing instant hot water at
this location and so satisfying the need for hot water at all upstream water
outlets. When the temperature requirement at the valve has been
signal is sent to turn off the pump. This system prevents continuous running and
saves energy.
For more energy savings, the ACT–4 wireless pump can be set for Timer
Operation to run only during the time periods when hot water is most frequently
required.
An optional push-button / signal repeater device is available to provide instant
hot water with a touch of a button. Pressing the push-button will activate the
pump and begin circulating hot water throughout the system, outside of the set
Timer Operation, until the desired temperature is met at the valve. Acting in its
secondary function as a signal repeater, this device will also extend the
operational range of the pump and valve and aid in the transmission of data
between the two devices where necessary.
The instant hot water delivery with the ACT–4 wireless potable hot water
recirculation kit saves water and time, while improving comfort, as water does
not need to run continuously while waiting for it to warm up.
Product Description
satisfied, a
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
7
1
2
3
4
5
7
6
8
9
10
Product Description
1. ACT-4 wireless pump
2. Hot water source
3. Hot water
4. Cold water
5. Hot water flex hose
6. cold water flex hose
7. Hot water supply hose
8. Cold water supply hose
9. ACT-4 wireless mixing valve
10. Optional push-button / repeater
8 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
Installation
Preinstallation
CAUTION:
All work must be performed by qualified personnel trained in the proper
application, installation, and maintenance of plumbing, steam and electrical
equipment or systems in accordance with all applicable codes and regulations.
The pump and valve as received in this kit are factory paired and wirelessly
communicate water temperature and pump status with each other.
Before installation of the pump and valve, complete the following:
• Shut off water supply.
• Turn off hot water source.
• Drain the lines.
• Allow the system to cool to a safe handling temperature, below 100°F
(38°C) and a zero pressure condition.
Installation
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
9
1
2
3
4
5
6
7
8
Installation
Recommended installation
1. Cold water supply
2. 3/4” NPT isolation valve
3. ACT4 wireless pump
10 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
4. 3/4” NPT male adapter, if required
1
2
3
5. 3/4” NPT isolation valve
6. Hot water source
7. Hot water
8. Flexible supply line
Install the pump
1. Remove the motor and timer unit, O-ring, and insert from the pump
housing. Set these items aside.
Installation
1. Pump housing
2. Pump o-ring
3. Pump insert
2. Connect the union end of the pump housing to the 3/4" NPT male inlet of
the hot water source, or male adapter and isolation valve connected to the
hot water source.
Make sure that the arrow on the pump housing is properly oriented in the
direction of the supply water
3. Connect flexible supply line to the 3/4” NPT male threads of the pump
housing.
Do not twist or excessively bend the hose. Replace the
shorter length if necessary. Use PTFE tape or pipe compound if necessary.
4. Reattach the motor and timer unit, the insert, and the O-ring to the pump
housing.
flow.
flexible hose with a
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
11
Installation
5. Orient the pump so that the timer is accessible. The timer should never be
positioned in any orientation above the pump housing.
6. Make sure that the screw ring that attaches the motor to the pump is
securely hand tightened. Do not attempt to further rotate the pump timer
or the pump may be damaged.
Over-tightening the pump screw ring can cause damage to the pump. Do
not use pipe compound or plumber's putty on the screw ring.
7. Turn on the water supply to the hot water source and verify that there are
no leaks at any connections.
8. Turn on the faucet/taps or shower farthest from the hot water source until
there is a steady stream of water with no sputter or evidence of air in the
lines.
9. Plug the pump cord into the wall outlet and start the system. In the event of
a disruption in the power supply, the ACT–4 wireless pump will resume
communication with the paired mixing valve.
10. Open the timer cover. Rotate the dial clockwise until the current time is
aligned with the pointer at the top (12 o'clock position) of the dial.
See Thermostat Controlled Operation PLUS Timer section below.
Install the valve
12 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
Installation
1. Prepare the installation site, which is the faucet/tap farthest from the hot
water source.
2. Close the hot and cold water riser shutoff valves and open the hot and cold
water faucets/taps to relieve the water pressure. Close the water faucets/
taps.
In some older homes, the riser shutoff valves may be difficult to shut off
completely. If so, turn off the water at the main water inlet valve to the
house.
3. Remove the existing
faucet/tap threaded nipples.
Use a bucket to collect any excess drainage.
a) If necessary, replace existing
braided
4. Screw on the two existing 1/2” hose connections to the corresponding hot
and cold sides of the valve housing, denoted as “H” and “C” respectively.
Grip the valve only by the brass hex feature during assembly.
Be careful not to kink the existing hose lines while bending, which can
prevent adequate
a) Inspect the rubber washers in the hose connections to ensure that
they are in reusable condition. If not, replace.
flexible line connections to the hot and cold water
flexible hoses with new stainless steel
flexible hoses in the lengths required.
flow and/or cause the valves to break.
5. Screw the 3/8" compression end of the purchased flexible hoses to the
3/8" connections on the valve. Screw the 1/2" ends of these same two
hoses to the underside of the hot and cold water faucet/tap respectively.
a) Make sure to match the hot and cold sides marked on the valve with
the corresponding faucet/tap.
b) Make sure that the hot side connection is attached to the hot water
faucet/tap and the cold water side connection is attached to the cold
water faucet/tap
c) Make sure that the hoses are long enough to allow the valve to be
positioned as planned.
6. If desired, fasten the valve to the wall or vanity cabinet using the optional
mounting bracket and screws that are provided in the kit.
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
13
Installation
7. Open the faucet/tap and hot and cold water riser shutoff valves to purge
any air entrained in the valve or hoses and to insure there are no leaks at
any connections.
8. Remove the locking screw from the battery compartment cover on the
valve. Insert the batteries in their proper orientation into the compartment
on the valve. Be sure to match the positive (+) and negative (-) ends of the
batteries with the corresponding polarity symbols on the bottom of the
housing. Installing one battery in reverse will result in improper system
operation. Return the locking screw to its proper position when the
batteries have been installed.
CAUTION:
Short circuit hazard. Improper battery installation may
cause personal injury or property damage due to short
circuit or battery leakage.
This installation method applies to most situations where faucets/taps are
connected to hot and cold water supply lines with braided flexible hose/shut-off
valve arrangements. If the under-sink arrangement is different, for example the
risers are hard copper or plastic, then other parts not listed here may be
required for the installation.
14 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
1
2
3
4
Commissioning, Startup, Operation, and Shutdown
Commissioning, Startup,
Operation, and Shutdown
Thermostat controlled operation
The valve and pump are ready to communicate with each other out of the box.
The pump comes with an adjustable temperature feature. This feature is
controlled by the thermostat dial just above the timer housing on the body of
the pump and may be set to activate between 86°F (30°C) and 95°F (35°C). This
temperature range represents the desired water temperature to be sensed at
the remotely set under-sink mixing valve.
• Slide the switch on the timer housing to the “ON” position.
In the “ON” position, the pump runs automatically whenever the built-in
temperature sensor in the valve senses the need for hot water at the under-sink
valve. In the “OFF” position, the pump does not operate at any time. In either
instance, the LED light on the thermostat knob will remain steady.
The pump will most likely start running immediately and turn off after a few
minutes when hot water reaches the faucet/tap. The pump continues cycling on
and off as required during the programmed sequence of operation. (Do not be
concerned if the pump does not begin to run immediately after the pump is
plugged in, or at times throughout normal operation. This just means that there
is already hot water at the hot water faucet/tap. The pump turns on
automatically when the hot water line cools down.)
Thermostat controlled operation Plus Timer
1. Set current time here
2. Pump runs when valve calls for hot water
3. Pump runs only during the desired times when valve calls for hot water
4. Pump does not run
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
15
Commissioning, Startup, Operation, and Shutdown
1. Open the timer cover with a small flat head screwdriver. Verify that current
time setting is correct. If not, rotate the dial clockwise until the correct time
is aligned with the pointer at the top (12 o'clock position) of the dial.
2. Automatic Operation: Pull the tabs out on the timer for the desired
operating time. For example, if the desired operating time is 9:00 AM to
11:00 AM, pull out all tabs from 9 through 11.
16 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
1
Commissioning, Startup, Operation, and Shutdown
1. Pull tabs out for desired time
The timer can be set for multiple operating periods of time, in 1/2 hour
increments.
3. Slide the switch bar to the clock symbol.
Optional Push-Button / Signal Repeater
The pump and valve as received in this kit are factory paired and wirelessly
communicate water temperature and pump status with each other. An optional
push-button device is available to provide instant hot water regardless of the
circulator pump’s timer setting. This device also works as a signal repeater,
extending the operational range between the pump and valve.
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
17
Commissioning, Startup, Operation, and Shutdown
Push-Button Operation
Follow this procedure when you add the push-button device to your system and
pair it with your ACT4 wireless pump and valve:
1. Begin the pairing process by opening the timer cover on the pump and
performing the following sequence with the pump timer switch:
a) Slide the switch from the “ON” position to the “OFF” position and wait
two (2) seconds.
b) Slide the switch to the “ON” position and wait two (2) seconds.
c) Slide the switch to the “OFF” position and wait two (2) seconds.
d) Return the switch to the “ON” position. A series of rapid
the LED light in the thermostat knob of the pump will indicate that it
has entered pairing mode. The pump will remain in pairing mode for
ten (10) minutes.
2. Power up the push-button / signal repeater device to be paired by
plugging it directly into a nearby outlet. While plugging the push-button
device into the outlet, depress and hold the push-button. Keep the pushbutton depressed for
push-button / signal repeater is also indicated by a rapid series of flashes
from its own LED light and will remain in pairing mode until it
communicates and pairs with the pump.
3. Upon successful pairing, the LED light in the thermostat knob of the pump
will produce a steady glow, indicating that the pump is running or is on
stand-by. The LED light in the push-button device will produce a seldom
flash when the system is on stand-by or a steady glow when the pump is
running.
The push-button is now ready for service. Once the push-button / signal
repeater has been paired with the pump, it can be relocated to the desired
outlet without having to be re-paired.
The pump is capable of pairing with only two devices: the valve and the
optional push-button / signal repeater.
Signal Repeater Operation
When used as a signal repeater, the device will extend the operational range of
the ACT4 wireless hot water recirculation kit beyond the normally
distance. Device pairing is not required when used as a signal repeater. It will
aid in the transmission of data between the pump and valve in environments
where building construction or other factors may interfere with ongoing
communication.
When used as a signal repeater, the device should be installed at an outlet at an
intermediate location between the pump and valve.
five (5) additional seconds. Pairing mode on the
flashes from
specified
18 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
Maintenance
Valve and pump inspection
Periodically inspect the valve or pump for signs of leakage or corrosion.
WARNING:
Risk for property damage, serious personal injury or death. You must replace
the valve or pump if corrosion or leakage is found.
Pairing after pump or valve replacement
If either the pump or the valve is replaced, device pairing is required. To pair
the devices, follow this procedure:
1. Power up the valve by inserting the batteries.
If the valve is already in operation, remove and reinsert the batteries. If the
valve is being replaced, remove the batteries from the old valve before
pairing the new replacement with the pump. It is recommended to use a
fresh set of batteries in the new valve being installed.
a) If a push-button / signal repeater device requires pairing, plug it
directly into the desired outlet.
2. Open the timer cover on the pump. Slide the switch from the “ON” position
to the “OFF” position.
3. Wait two (2) seconds and slide the switch from the “OFF” position to the
“ON” position.
4. Wait two (2) seconds and slide the switch to the “OFF” position.
5. Wait two (2) seconds and return the switch to the “ON” position.
When the device is successfully paired, the LED in the thermostat knob is lit. The
pump is now ready for service.
Maintenance
Replace the batteries
The system is designed to provide effective communication between the pump
and valve for approximately two (2) years after system start-up or battery
replacement when using two (2) 1.5 V LR06 alkaline batteries. When using
rechargeable batteries, it is recommended that they have a minimum 2500 mAh
capacity.
Do not mix new and old batteries or other makes of batteries, such as alkaline
with lithium-ion. The different attributes can negatively affect the system
performance or cause the batteries to leak
When new batteries are inserted into the valve, the valve will resume
communication with the pump.
CAUTION:
Risk of property damage or personal injury. You must replace the valve if battery
leakage is found.
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
fluid, overheat, or explode.
19
Maintenance
Return to service after shutdown of two weeks or more
You may choose to turn the system off (slide the pump timer switch to the “OFF”
position) as there is no need to maintain hot water in the supply line when no
one is home. Before turning the system back on, follow these instructions:
1. Open the faucets/taps at the sink where the system is installed. Keep them
open until all air is purged and the water flows smoothly.
2. Slide the pump switch back to either the "ON" position or the clock
position for Timer Operation.
20 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
Troubleshooting
LED codes
Pump LED sequence code Explanation
No light Pump is off — no power
Steady light on LED Pump is running or on stand-by
One short and one long flash Low input voltage to pump
Two short and one long flash Communication is lost between pump and valve
Three short and one long flash Pump is overheated
Four short and one long flash Pump is overloaded
Five short and one long flash Blocked rotor inside pump
Six short and one long flash Low battery voltage at the valve
Short fast flashes Pump is in pairing mode
Repeater / push-button LED sequence code Explanation
Steady light System is running
Seldom flashes System is running
Short fast flashes Push-button / signal repeater is in pairing mode
Troubleshooting
Operation troubleshooting
Symptom Cause Remedy
Pump does not turn on Timer slide switch is set to “OFF”
position or timer clock is not
programmed to allow operation.
Water at the valve is already at
the set temperature and does not
require pump operation.
Outlet has no power Check that there is power at the
GFCI is tripped. Verify the “TEST” and “RESET” of
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
Set the slide switch to the “ON”
position or program the timer
clock.
Pump will turn on when the
water at the valve cools. Verify
the temperature setting on the
pump.
outlet. Make sure the outlet that
the pump is plugged into is not
controlled by a wall switch.
the GFCI outlet that the pump is
plugged into.
21
Troubleshooting
Symptom Cause Remedy
Pump is noisy Air in the system Turn off the ecocirc pump. Turn
on the hot and cold faucets/taps
until all air is purged from the
system.
Foreign matter in the rotor cavity Unplug pump and shut off water
supply. Open faucets/taps and
drain water from the piping.
Loosen the screw ring to separate
motor from the pump housing
and check for foreign matter.
Rotor does not seat properly. Ensure the rotor is properly set
Water hammer that results from
the closure of the built-in check
valve.
Hot water is not instantly
available at all faucets/taps
Water at faucets/tap is too hot The temperature setting on the
Faucets/taps are branched off
from the main hot water supply
line.
Water temperature at the valve is
at or above the set temperature.
Hot water source not producing
hot water.
Distance between the pump and
valve is greater than 150 ft (45
m).
hot water source is too high.
on the motor bearing by pushing
down on the rotor.
Install water hammer arresters on
the hot and cold lines.
Hot water will take longer to
reach branched faucets/taps.
Verify the temperature setting at
the pump.
Verify temperature setting at hot
water source.
Verify hot water source operation.
Install a signal repeater / push-
button to assist communication
between pump and valve.
Adjust temperature setting on
hot water source.
22 Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
Troubleshooting
Symptom Cause Remedy
Pump is overheated Hot water source is generating
Communication is lost between
pump and valve
Pump is overloaded Improper power to pump outlet Consult electrician to determine
Blocked rotor inside pump Foreign matter in the rotor cavity 1. Unplug pump and shut off
Low input voltage to pump Improper power to pump outlet Consult electrician to determine
too much heat.
Ambient temperature is too hot. Make sure the pump and hot
Pump is overloaded. See possible causes and
Batteries are dead/Low battery
voltage.
Incorrect battery orientation. Verify correct battery orientation.
Distance between the pump and
valve is greater than 150 ft (45m)
or disruptive media interferes
with communication.
Pump rotor is not freely rotating. 1. Unplug pump and shut off
Adjust temperature setting on
hot water source.
water source are properly
ventilated to allow cooling.
remedies below.
Replace batteries.
Install a push-button / signal
repeater to assist communication
between pump and valve
cause.
water supply.
2. Open faucets/taps and
drain water from the
piping.
3. Loosen the screw ring to
separate motor from the
pump housing.
4. Verify that the pump rotor
is seated properly and
there is no debris.
5. Rotate the pump rotor
counter-clockwise for three
or four revolutions to make
sure it can freely spin.
water supply.
2. Open faucets/taps and
drain water from the
piping.
3. Loosen the screw ring to
separate motor from the
pump housing and check
for foreign matter.
cause.
WARNING:
Extreme temperature hazard. Water temperature above 125°F (51°C) can cause
severe burns or scalding instantly.
Laing Thermotech ACT-4 wireless Potable Hot Water Recirculation Kit Instruction
Manual
23
Xylem |’zīləm|
1) The tissue in plants that brings water upward from the roots
2) A leading global water technology company
We're 12,000 people
unified in a common purpose: creating innovative
solutions to meet our world's water needs. Developing new technologies that
will improve the way water is used, conserved, and re-used in the future is
central to our work. We move, treat, analyze, and return water to the
environment, and we help people use water
efficiently, in their homes,
buildings, factories and farms. In more than 150 countries, we have strong,
long-standing relationships with customers who know us for our powerful
combination of leading product brands and applications expertise, backed by
a legacy of innovation.
For more information on how Xylem can help you, go to xyleminc.com
Xylem Inc.
3873 Willow, Suite #104
Fresno, CA 93725
Tel: 1-559-265-4730
Fax: 1-800-453-4730
http://
unitedstates.xylemappliedwater.com/
brands/laing-thermotech/
Visit our Web site for the latest
version of this document and more
information
The original instruction is in English.
All non-English instructions are
translations of the original
instruction.
©
2013 Xylem Inc
Laing Thermotech is a trademark of
Xylem Inc or one of its subsidiaries.
671075145_B
Loading...