Watts SENTINEL LEAK DEFENSE LDS-3-075 User manual

CRITICAL NOTES for installing the Leak Defense System are highlighted in shaded boxes throughout the document.
It is essential these critical notes are read prior to installation.
VERY IMPORTANT!
• Bracing may be required if your plumbing system is unable to support this weight.
• Please contact our Technical Support team to confirm details of the installation to ensure the system will be installed
correctly and no water using appliances go unaccommodated.
Installation, Operation and Maintenance Manual
IOM-S-Leak Defense
WARNING
!
Please read carefully before proceeding with
installation. Your failure to follow any attached
instructions or operating parameters may lead to the
product’s failure.
Keep this Manual for future reference.
INSTALLER
Please leave this guide with the homeowner
when installation is complete
Need help?
Feel free to call us from 8am - 5pm Monday - Friday
Pacific Time: [phone], ext. 2
[email protected]

2IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
The Leak Defense System monitors the flow of water into your home 24 hours a day, 7 days a week. Should a leak
develop, the system will alarm, and, if the leak is not corrected, will automatically halt all water flow to the home before
additional damage can occur.
System Overview
The system includes a motorized ball valve, extremely low flow sensors, and a control panel with a touch screen display.
If water flow to your home continuously exceeds your system settings for more than your predetermined time, the alarm
will sound and the ball valve will close — shutting off water to your home and potentially preventing major water damage.
So the principle of the system is continuous water flow over time. Faucets, toilets, and other water fixtures in your house
allow for water to start and stop. A leak is the one situation where the water does not stop. The Leak Defense System is
looking for this.
System Features
• Constant monitoring of your water system (24 hours per day, 7 days a week)
• Leak detection with audio/visual alarm notifications
• Automatic water shut-off protection to minimize water damage
• State of the art wireless color touch screen control panel
• System retains all settings in memory, even if the electrical power is interrupted
• Simple menu driven programming
• Ability to turn water ON and OFF from the control panel or app
• Patented maintenance-free thermodynamic flow sensors
• Able to connect with other building/home management or security system
• Able to send notifications via email, text, and/or push
Congratulations on installing the most advanced system available to protect
Homeowners against catastrophic loss due to water damage.
Sentinel HydrosolutionsTM Leak Defense System
Help Line: 1.866.410.1134 ext. 2
M-F 8:00 am to 5:00 pm (PT)
[email protected]
Device ID (found on the box, or in the control panel):
Serial Number (found on the box, or top of actuator):
Installation Date:
Installed by Company/Person:
Installer Phone Number:

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IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
Using pages 32-37 of the Owner’s Manual section as a guide:
a. Explain the system and use the control panel to demonstrate the various Leak Defense System functions.
b. Encourage the owner to physically interact with the control panel during your demonstration. This will promote a
level of comfort and usability.
c. Clearly explain the purpose of the Leak Defense System is to detect and protect from leaks and not
to locate the source of leaks.
d. Explain that the Leak Defense System will constantly monitor water flow every day.
e. Explain the importance of using the AWAY scene
1. Explain the difference between the HOME and AWAY scene settings
2. Explain that not using the AWAY scene when the home is unoccupied limits protection to the HOME scene settings.
Owners
There are helpful videos on our website with information that might be more up to date regarding the operation of your
Leak Defense System. You can access them at www.leakdefensesystem.com/videos/
INSTALLER
After installation, review Leak Defense System operation with the owner
NOTE: Take the owner through an alarm scenario as part of the customer education and to test the alarm.

4IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
Planning and System Preparation PAGE
Step 1: Tools and supplies needed ................................5
Step 2: Pre-Installation survey .......................................6
Installing the Valve/Flowbody
Step 3: Determining the valve location for the Leak Defense
System ..........................................................................7
Power & Panel Location
Step 4: Locate an electrical outlet for the valve ..............8
Step 5: Determine wireless control panel location ...........8
Installing the Valve/Flowbody
Step 6: Cut a space to accommodate valve/flowbody ....9
Step 7: Install Leak Defense System valve/flowbody.......9
Checks & Programming
Step 8: Connecting to power........................................10
Step 9: Mount the wireless control panel .....................10
Step 10: Powering the System .....................................10
The Wireless Control Panel
Step 11: Confirm control panel water shut-off feature ..11
Step 12: Calibrating the system ...................................12
Step 13: Verify and set automatic shut-off features ......13
Step 14: Other features / Selecting the scene ..............14
API-All Purpose Interface
Step 15: API-All Purpose Interface ......................... 15-16
API Installations
Connecting a four-hour timer to the LDS API ...............16
Connecting POL and SS relays to the API ...................17
Recirculation pump switch to the API ..........................18
Wiring instructions for a PAM-1 relay ...........................19
Diagrams
Figure 1: General piping diagram .................................20
Figure 2: Connecting a four-hour timer to the LDS API .21
Figure 3-4: Connecting SS relays and Sensors
to the API ..................................................................22
Figure 5: Recirculation pump switch to the API ............23
Figure 6: Wiring instructions for a PAM-1 relay .............24
Security Diagrams
Figure 7: Zone Loops ..................................................25
Figure 8: Relay Trigger .................................................26
Figure 9: Positive Trigger ..............................................27
Figure 10: Negative Trigger ..........................................28
Figure 11: Connecting Water Softener (micro switch)
to API ........................................................................29
Figure 12: Connecting Water Softener (clack) to API ....30
Figure 13: General System ...........................................31
OWNER’S MANUAL:
Control panel overview ................................................32
Setting Home and Away / Turning off the water / Program
the system ...................................................................33
Warning Cycle Feature .................................................34
Alarm is Sounding, What Do I Do? ...............................34
Point of Leak Detectors (POLD) ...................................35
Set up WiFi and web-based app .................................36
Fine-tuning to your lifestyle ..........................................37
Warranty
Leak Defense System Limited Warranty........................38
Table of Contents

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IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
I. Pipe cutting, soldering equipment and supplies
II. Tape measure
III. Pipe marking pen
IV. #2 Phillips screw driver
V. 1⁄4" twist drill bit and drill (diameter of no more than .160" )
VI. 2 ea. - #6 drywall anchors and screws
STEP 1: Tools and Supplies Needed
PN DIN A* B C D E F G H** I J K Weight
LDS-3-075 DN20 .750 (19.1) 7.72 (196) 6.93 (176) 4.84 (123) 6.41 (163) 3.00 (76.2) .600 (15.2) 3.50 (88.9) 1.57 (39.9) 2.40 (61.0) 6.50 (165) 4.60 (2.09)
LDS-3-100 DN25 1.00 (25.4) 8.33 (212) 7.36 (187) 4.84 (123) 6.41 (163) 3.35 (85.1) .600 (15.2) 3.50 (88.9) 1.93 (49.0) 2.40 (61.0) 6.85 (174) 5.35 (2.43)
LDS-3-125 DN32 1.25 (31.8) 8.63 (219) 7.50 (191) 4.84 (123) 6.41 (163) 3.66 (93.0) .600 (15.2) 3.50 (88.9) 2.30 (58.4) 2.40 (61.0) 7.16 (182) 6.15 (2.79)
LDS-3-150 DN40 1.50 (38.1) 9.56 (243) 8.14 (207) 4.84 (123) 6.41 (163) 4.15 (105) .600 (15.2) 3.50 (88.9) 2.87 (72.9) 2.90 (73.7) 7.65 (194) 7.60 (3.45)
LDS-3-200 DN50 2.00 (50.8) 12.0 (305) 10.2 (259) 6.18 (157) 7.50 (191) 4.80 (122) .600 (15.2) 3.50 (88.9) 3.60 (91.4) 2.90 (73.7) 8.30 (211) 12.1 (5.49)
LDS-3-250 DN65 2.50 (63.5) 14.2 (361) 12.0 (305) 7.28 (185) 7.87 (200) 6.10 (155) .600 (15.2) 3.50 (88.9) 4.51 (115) 2.90 (73.7) 9.60 (244) 18.7 (8.48)
LDS-3-300 DN80 3.00 (76.2) 15.0 (381) 12.4 (315) 7.28 (185) 7.87 (200) 6.89 (175) .600 (15.2) 3.50 (88.9) 5.35 (136) 2.90 (73.7) 10.4 (264) 27.1 (12.3)
LDS-3-400 DN100 4.00 (101.6) 16.8 (427) 13.57 (345) 8.31 (211) 9.33 (237) 7.84 (199) .600 (15.2) 3.50 (88.9) 6.46 (164) 2.90 (73.7) 11.4 (288) 40.4 (18.3)
**A is Nominal **H is Average Length **All Fittings are NPT **in (mm) **lb (kg)
PLANNING & SYSTEM PREPARATION

6IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
There are six steps necessary to properly perform a
pre-installation survey. These are:
1) Determine the best location for the Leak Defense
System valve
The valve must be located downstream of any fire
sprinkler system and, ideally, should be located
down-stream of all irrigation lines. The valve should be
installed in an indoor location free from direct sun and
moisture.
If installed outdoors, ensure the LDS valve/actuator is
protected against rodent damage, gardener damage,
freeze damage, and UV damage, by wrapping it in a
protective insulated pouch or plastic protective enclo-
sure. Sentinel can provide one of these options upon
request.
2) Determine if any of the following water using
systems are downstream of the Leak Defense
System valve:
a) Reverse Osmosis Water Purification System
b) Water Softener System
c) Irrigation System
d) Automatic Pool Fill System
e) Outside hose bibs
f) Booster pump with holding tank/bladder
g) Any other appliance that may automatically use water
3) If any of the above are present down-stream of the
Leak Defense System valve, please contact your sales
representative for accessories to accommodate these
items.
4) Determine where a non-switched 120 VAC outlet
is in a dry location and determine how you will get
the (2 conductor) power wire to the transformer at
this location
24 VAC from the transformer should not be run longer
than 100 feet. If a longer power wire is needed, it is
recommended that a new 120VAC outlet be installed
closer to the Leak Defense System
5) Determine where the customer would like the
wireless control panel and confirm it is within
100’ of where the valve is installed
A standard 120 outlet is required to provide power to
the wireless panel
6) A battery backup or generator is recommended for
locations that are prone to power outages
STEP 2: Pre-Installation Survey
ATTENTION INSTALLER!
If this is your first installation, call before installing the LDS and Spring Check Valve.
Otherwise, call after installing for control panel setup.
8:00am to 5:30pm PT | 760-884-8300 ext. 2
FAILURE TO CALL AND SPEAK WITH ONE OF OUR TECHNICIANS VOIDS ANY WARRANTY ON THE LEAK
DEFENSE SYSTEM.

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IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
The Leak Defense System valve must be installed on the
main water line and downstream of the primary shut-off
valve, pressure regulator, irrigation line and fire sprinkler
line.
Typical location of the Leak Defense System valve instal-
lation will be in a garage, basement or crawl space. If the
home is on a concrete slab, the valve can be installed in
the garage or before water enters the home. In the latter
case, the valve should be located at least 18” above
grade. It must be protected from direct sun exposure,
moisture and freezing conditions.
Other important considerations include:
Other important considerations include:
a. Install the valve in an accessible location allowing easy
access for proper installation and maintenance
b. Some water utilities require the valve be a minimum of
18” downstream of the water utility meter
c. If possible, install the valve downstream of a manual
shutoff valve to allow for easier maintenance
d. A bypass around the valve is not required but may
be recommended
e. Bracing may be required if your plumbing system is
unable to support the weight.
STEP 3: Determining the valve location for the Leak Defense System
IMPORTANT: If the above diagram does not reflect your actual piping layout, call us for recommendations to
accommodate your unique piping configuration and ensure no water inside the premises goes unmonitored.
[phone], ext. 2 or email [email protected]
IMPORTANT: The valve cannot be installed where it may be submerged in water or exposed to moisture or freezing
conditions. An appropriate insulated or water proof box should be installed to protect the Leak Defense System.
Note: If there is a fire sprinkler and/or irrigation system that branches off the building supply downstream of the
utility meter, the Leak Defense System valve must be installed on the building supply downstream of the fire
sprinkler, and if possible, irrigation supply branch. In no instance may the Leak Defense System be installed in a
way that it will interfere with the fire sprinkler system.
Note: The Leak Defense System sees water flowing, but does not differentiate between flow direction (flow in vs.
out). As water main pressures fluctuate, there may be a slight flow out of the home/office which will be seen as
flow. A backflow preventer valve (spring check valve) is recommended to remedy this. This backflow will usually
only be an intermittent or sporadic event, while a leak will have continuous water movement.
INSTALLING THE VALVE/FLOWBODY
SEE FIGURE 1
GENERAL PIPING DIAGRAM
PAGE 20

8IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
a. Locate an available 120 VAC outlet close to the valve
into which the transformer can be plugged.
Make sure this outlet is not connected to an on/off
switch or a GFI.
b. The 120 VAC outlet should not be more than 100 feet
from the valve. If a longer power wire is needed, it is
recommended that a new 120 VAC outlet be installed
closer to the valve.
a. The control panel should be located inside near the
most frequently used door of the home or in an easily
accessible area.
b. Once a location is chosen, make sure there is an outlet
within 6’ to provide power to the wireless panel with the
provided 12VDC power supply.
c. The wireless control panel should be located no farther
than 100 feet from the Leak Defense System valve.
50’ or less is recommended for reliable connection.
d. The standard power supply cable length is 6’. For con-
cealing the low voltage cable behind drywall, a hardwire
connection with additional cable length is available upon
request.
STEP 4: Locate an electrical outlet for the valve
STEP 5: Determine wireless control panel location
POWER & PANEL LOCATION
Critical: The outlet must be located in a dry location.
Note: Please install control panel at least 8 inches (20
centimeters) from a common use area, per FCC/IC
regulations.
LDS Panel
POLD Panel
(Non-LDS)

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Cut space in existing pipe wide enough to
accommodate the valve/flowbody.
The Leak Defense System includes a lead-free brass valve
connected to a stainless steel flowbody. This valve/flow-
body assembly is designed to be installed as one unit and
should never be disassembled. If a split-system is needed,
contact us.
The Leak Defense System requires a length of pipe be
removed to accommodate the valve/flowbody assembly
and any connectors. The Leak Defense System valve/
flowbody assembly can accept all common methods
of pipe connections including unions, sweat adapters
threaded pipe, or lead-free brass unions. Dielectric unions
should only be used when connecting galvanized pipe to
our system. Installer is responsible to maintain continuity of
electrical grounding system per local codes.
a. Install using standard unions, sweat adapters, or
threaded pipe.
b. Do not install in prolonged direct sunlight. This causes
water in the valve to heat and the probes will interpret
this as water flow.
c. Make sure the valve has been installed in the orientation
specified on the label (i.e. Vertical Up, Vertical Down,
or Horizontal) with water flowing in the direction of the
arrow on the flow body.
d. Restore water supply.
e. Check for leaks at the valve/flowbody and probe.
STEP 6: Cut a space to accommodate valve/flowbody
STEP 7: Install Leak Defense System valve/flowbody
INSTALLING THE VALVE/FLOWBODY
Critical: If some form of sweat adapter is used, it is
imperative that heat from the torch does not reach the
valve/flowbody as this may cause permanent damage
to the Leak Defense System unit.
Important: Bleed air slowly from the piping system
to prevent damage to the Leak Defense System or
to any other plumbing fixtures when water flow is
restored.
WARNING: Do not place any
tools on the delicate black
portion of this sensor.

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a. Connect the gray connectors on the transformer wire and valve power wire.
b. Extend the wire that will go to transformer.
c. Make sure wires are connected to the transformer AC and AC terminals.
a. Use a pencil to mark the location of the mounting holes in the housing on the wall.
b. Using #6 drywall anchors and screws, place 2 screws 2-1/2” apart, then slip panel onto screws.
Manual vs. Automatic Valve Position:
WARNING: Valve should be unplugged from power prior to attempting to open/close the valve manually.
Systems 1.5” or smaller have a manual override on the front of the blue actuator. Normal operation requires the dial be
positioned in the “AUTO” mode. “MAN” is only to be used when system needs to be overridden manually to open/close
the valve.
Systems 2” or larger, press and hold black knob on top of blue actuator and turn to desired position.
STEP 8: Connecting to power
STEP 9: Mounting the wireless control panel directly on a wall
STEP 10: Provide power to the system
CHECKS & PROGRAMMING
Optional Power Supply: Should you wish to hide the power supply wire feeding the control panel, an electrician
can run the low voltage wire behind the drywall and connect it to screw terminals on the back of the control panel
circuit board.
a. Plug the white 24VAC valve transformer into the outlet that was located in Step 4. Actuator should fully close and
fully reopen.
b. Plug in the black 12v transformer to the wireless control panel.
c. Many customers qualify for insurance deductions and require a certificate of installation. We require pictures of
all installed components, and pictures of Control Panel home page and status page after calibration (step 12).
Send these images to [email protected] or text to your salesperson’s direct number. Include Device ID # and
installation address with your text or email.

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The wireless control panel will be used to set up and control your Leak
Defense System.
From here you will be able to perform certain tasks like placing your Leak Defense in the Home , Away or
Standby Scene. You will also be able to adjust the Time to Alarm (continuous time water can flow) in the Home and
Away mode and the length of time you want the Leak Defense to remain in Standby. The trip rates for Home and Away
mode are also set here. The main screen will also allow you to Turn Water Off, check the status, and adjust the Leak
Defense System.
Please keep in mind that it takes a few seconds for the wireless panel to communicate with the Leak Defense System
valve.
THE WIRELESS CONTROL PANEL
STEP 11:
Here is how it works
Confirm control panel water shut-off feature
DESIRED ACTION ON-SCREEN ACTIONS
Turn water OFF Main Screen
Tap the Water button
When asked “Turn Water Off?” tap Yes
Valve will start closing and Water icon will turn GREY
When fully closed Water icon will be YELLOW with a slash
Turn water ON Main Screen
Tap the Water button
When asked “Turn Water On?” pres Yes
Valve will start opening and Water icon will turn GREY
When fully open Water icon will change to match the color of the
scene currently selected. Home = GREEN, Away = BLUE, Standby =
ORANGE

12 IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
THE WIRELESS CONTROL PANEL
Please call Technical Support at
866-410-1134 Option 2 so we can verify
and record proper calibration values,
to validate the warranty.
Note: Recommended Min mW should
be at or slightly above the mW when the
valve is closed. Max and Min should be
fairly far apart.
STEP 12:
Calibrate the system
DESIRED ACTION ON-SCREEN ACTIONS
Calibrating the Leak Defense System Main Screen
Navigating to the Calibration Screen Tap the Menu button.
Tap the Advanced button
Tap the Factory button
Type 65530 on the keypad, then tap the top right button (where it
displays this number)
Type 1on the keypad, then tap the top right button
You are now in the Flow Calibration screen
Set No Flow Once the water has been turned OFF and you are on the Flow
Calibration screen, tap the Set No Flow button
Return to the main screen by tapping the Exit button
Set High Flow Once the water has been turned ON and you are on the Flow
Calibration screen, tap the Set High Flow button
Return to the main screen by tapping the Exit button
Turn off faucet, observe the flow arc, water % will lower to 0% after
several seconds
If it does not, you may have water running or a leak
The most common sources of flows that could be identified as leaks are leaky toilet flappers, leaking
seals in faucets, bad rubber washers in hose bibs (outdoor water hose spigots), and evaporative type
humidifiers.

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THE WIRELESS CONTROL PANEL
STEP 13:
Verify and set automatic shut-off features
DESIRED ACTION ON-SCREEN ACTIONS
Main Screen with Scene set to Home (Water, Flow, and Scene
symbols are GREEN)
Tap the Trip Rate icon
Enter trip level percentage between 1 and 100
Tap top right button to select trip level setting (Factory default is10%)
Main Screen with Scene set to Home (Water, Flow, and Scene
symbols are GREEN)
Tap the Time to Alarm icon in the bottom left
Enter the time in minutes
Tap the top-right button to confirm the programmed time
(Can be set from 1 minute to 4 hours based on customer’s preference.
Example: 1 hour = 60)
Main Screen with Scene set to Away (Water, Flow, and Scene
symbols are BLUE)
Tap the Trip Rate icon
Enter trip level number between 1 and 100
Tap top right button to select trip level setting (Factory default is 10%)
Main Screen with Scene set to Away (Water, Flow, and Scene
symbols are BLUE)
Tap the Time to Alarm icon in the bottom left
Enter the time in minutes
Tap the top-right button to confirm the programmed time
(Can be set from 1 minute to 4 hours based on customer’s preference.
Example: 3 minutes = 3)
Setting Time to Alarm – HOME Scene
Time to Alarm = The amount of time
water is allowed to flow for before the
valve closes
Setting Trip Rate % – AWAY Scene
Setting Time to Alarm – AWAY Scene
Setting Trip Rate % – HOME Scene
Trip Rate = Sensitivity or the amount
of water flow needed to trigger time to
alarm

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THE WIRELESS CONTROL PANEL
Standby Scene allows water to flow
without alarming for the entire duration
of Standby. Ideally this is used to allow
contractors to work without causing
the system to alarm or when filling a
pool downstream of the system. If there
are POLDs installed, you can choose
whether or not they can alarm the
system during standby.
STEP 14:
Other features
DESIRED ACTION ON-SCREEN ACTIONS
Setting the Standby Scene Main Screen with Scene set to Standby (Water, Flow, and Scene
symbols are ORANGE).
Tap the Time icon in the bottom left.
Enter the time in minutes.
Tap the top right button to confirm the programmed time.
(Can be set from 1 minute to 48 hours based on customer’s preference.
Example: 3 hours = 180)
Alternative method to Turn Water Tapping the middle of the circular percentage bar brings up a menu with
On/ Off, Change Scene, Trip Rate, options to Turn Water On/Off, Change Scenes, and adjust the Trip
and Time to Alarm Rate and Time to Alarm as well as check the Status of the system.
ATTENTION:
Putting the leak defense system in standby
means water flowing into the structure is
NOT monitored. A leak will go undetected
in standby mode.

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The All-Purpose Interface (API) is a device that can inter-
face to various accessories to complement the perfor-
mance of the LDS system, reduce nuisance alarms, and
improve the customer’s experience and satisfaction with
the system. It should be placed within 100’ of the control
panel to maximize signal strength. A few of the common
adaptations and applications are described below.
POLD+ if you were to wire up a POLD sensor to the API
(and it is polarized) the Sensor would have its black wire
going to GND and its red wire going to POLD+. When the
POLD+ goes to GND level, it trips.
To reset the alarm: First make sure that the sensor is com-
pletely dry. Then press and hold the TEST button on the
API for 3 seconds. The LED will go dark until the button is
released and will stay lit until the alarm condition is cleared
at the control panel.
The opto isolators used for HOME/AWAY and STANDBY
have non-committed inputs for maximum flexibility.
The input voltage is not to exceed 12 volts.
The IN+ would need to go to the positive input potential
STEP 15: API-All Purpose Interface
ALL PURPOSE INTERFACE (API)
through a switch or wire.
The IN- would need to go to the negative or GND potential through a switch or wire.
Each opto-isolator has its own IN+ and IN- and they can be wired for high going signals, or GND (low) going signals. The
+REF and -REF signals are used as the voltage references for the optos. +REF usually reads 12VDC, while -REF is GND.
If (for example) you want the STANDBY to activate when its signal is grounded, then you would wire up the IN+ of
STANDBY to the +REF and the IN- goes through a switch or relay to GND. If connecting to an alarm panel, make sure
that the GND’s are the same potential by connecting its GND to the API GND or -REF pins.
If (for example) you wanted to hook up an Alarm Panel that goes to 12 volts when in AWAY mode. Then wire the Alarm
Panel GND and HOME/AWAY IN- to the API GND or -REF and wire the HOME/AWAY IN+ to the 12 volt AWAY trigger
signal. (HOME mode is when the AWAY mode is not activated.)
These are the valid MODE SEL dial position settings:
7 - Relays change on Alarm only
F - Relays change on Alarm and Water off
These are additional MODE SEL dial position settings
(0 - 6 and 8 - E are currently unused):
0 - H/A DIS STBY DIS POLD DIS
1 - H/A ENA STBY DIS POLD DIS
2 - H/A DIS STBY ENA POLD DIS
3 - H/A ENA STBY ENA POLD DIS
4 - H/A DIS STBY DIS POLD ENA
5 - H/A ENA STBY DIS POLD ENA
6 - H/A DIS STBY ENA POLD ENA
7 - H/A ENA STBY ENA POLD ENA
8 - H/A DIS STBY DIS POLD DIS
9 - H/A ENA STBY DIS POLD DIS
A - H/A DIS STBY ENA POLD DIS
B - H/A ENA STBY ENA POLD DIS
C - H/A DIS STBY DIS POLD ENA
D - H/A ENA STBY DIS POLD ENA
E - H/A DIS STBY ENA POLD ENA
F - H/A ENA STBY ENA POLD ENA

16 IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
These settings will selectively create events that the API
can generate and transmit to the control panel. DIS means
that function is disabled and the system will ignore any
activity on those input lines. ENA means that function will
transmit and the panel will respond to input activity on
those lines.
The LED will flash briefly during data transmissions and
glow solid when the ALARM is active.
The RELAYS both operate together (as of rev 1.00).
• If the API is in Dial Position 7, the API relays will activate
when the system goes into alarm, and deactivate when
the user clears the alarm.
• If the API is in Dial Position F, the API relays will activate
when the system goes into alarm or when the water is
turned off (via control panel or web), but relays will only
deactivate after the water is turned back on.
STEP 15: API-All Purpose Interface (continued)
ALL PURPOSE INTERFACE (API)
API INSTALLATIONS
ATTENTION: Putting the leak defense system
in standby means water flowing into the home
is NOT monitored. A leak will go undetected in
standby mode.
DIAL POSITIONS:
F: Triggers on Water Off command (alarm or user
requested).
Ideal for connecting to circ pump switches and
solid state relays
7: Triggers on Alarm Only
Ideal for connecting to alarm panels
Connecting a Four-Hour or
Six-Hour Timer to the LDS API
This accessory is typically installed outdoors for a
gardener or landscaper to remotely and manually put the
LDS in standby (ignore water flow) mode for the length of
time the timer is rotated to.
• Connect the red wire from the timer to IN– (below
STANDBY) on the API.
• Connect the black wire from the timer to –REF on the
API.
• Place a jumper from IN+ (below STANDBY) to +REF.
• The yellow arrow dial on the API should face F.
• When the timer is activated you should see the Leak
Defense control panel switch from Home or Away to
Standby. When the timer runs out, the Leak Defense
should go back to the original state of Home or Away.
OFF
Turn
Past
LEAK DEFENSE SYSTEM
HOURS
JUMPER
JJ
R
R
B
B
ALARM
NC
COM
ALARM
RELAY #1
NONC
COM
NO
+REF
RELAY #2
HOME/AWAY
MODE SEL
IN+
IN-
STANDBY
LED
IN+
IN- -REF
POWER
5.5 x 2.1mm
9-12VDC
v+
GND
POLD
TEST PB
7-H/A ENA, STBY ENA, POLD ENA
6-H/A DIS, STBY ENA, POLD ENA
5-H/A ENA, STBY DIS, POLD ENA
4-H/A DIS, STBY DIS, POLD ENA
3-H/A ENA, STBY ENA, POLD DIS
2-H/A DIS, STBY ENA, POLD DIS
1-H/A ENA, STBY DIS, POLD DIS
0-H/A DIS, STBY DIS, POLD DIS
Here are the valid MODE SEL combinations
FOR TECHNICAL SUPPORT:
Please call our office at 1.866.410.1134 – 8:00am to 5:00pm Pacific Time
SEE FIGURE 2 DIAGRAM
PAGE 21

17
IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
API INSTALLATIONS
Note 1: The yellow arrow dial, located toward the
center of the API circuit board, needs to be facing F.
Note 2: To test the POL sensor, take a moist paper
towel and touch the 2 metal sensor pins. The Leak
Defense System will go into alarm and the solid-state
relays should turn off the well pump. Push the reset
button on the API before pressing Clear Alarm on the
Leak Defense control panel.
Note 3: When alarm is active, a 6-volt signal is being
applied across each of the solid-state relay’s terminal 3
and 4, from the API. This causes the normally-closed
solid-state relay to open and shut off the pump.
Connecting POL and SS relays
to API
This application is typical for when a 240VAC (up to
50amp) well pump or pressure pump is wanting to be
disconnected when a leak is detected with a POL or when
the LDS valve closes upon suspected water leak.
For terminals 1 and 2 of solid-state relay #1, split a hot leg
of the well pump wire and connect one side of the split
wire to terminal 1 and the other to terminal 2. For terminals
1 and 2 of solid-state relay #2, split the other hot leg of the
well pump wire and connect one side of the split wire to
terminal 1 and the other to terminal 2.
On the API place a jumper between +REF and NO on
either of the API relays.
Wire the solid-state relay input terminals in series as
follows.
Take COM of the same API relay and run a wire to terminal
3 of solid-state relay #1. Then take terminal 4 of solid-state
relay #1 and connect it to 3 of solid-state relay #2, with a
jumper wire. Then take terminal 4 of solid-state relay #2
and run a wire back to –REF on the API.
If you purchased a wired POL, the POLD and GND
terminals of the API get connected to the two wires of
the POL sensor. No connection necessary for wireless
POLD sensor.
SOLID STATE RELAY #1
12
4+3
INPUT
OUTPUT
240VAC 50A
3-32VDC
50A
+3
2
3-32VDC
240VAC
OUTPUT
INPUT
4
1
SOLID STATE RELAY #2
JUMPER
JJ
240VAC OUTLET WELL PUMP
HOT #1 (H1)
HOT #1 (H2)
NUETRAL (N)
NN
H1
H1 H1
H1
H2
H2 H2
H2
JUMPER
JJ
B
B
R
R
R
RB
B
POL
ALARM
NC
COM
ALARM
RELAY #1
NONC
COM
NO
+REF
RELAY #2
HOME/AWAY
MODE SEL
IN+
IN-
STANDBY
LED
IN+
IN- -REF
POWER
5.5 x 2.1mm
9-12VDC
v+
GND
POLD
TEST PB
7-H/A ENA, STBY ENA, POLD ENA
6-H/A DIS, STBY ENA, POLD ENA
5-H/A ENA, STBY DIS, POLD ENA
4-H/A DIS, STBY DIS, POLD ENA
3-H/A ENA, STBY ENA, POLD DIS
2-H/A DIS, STBY ENA, POLD DIS
1-H/A ENA, STBY DIS, POLD DIS
0-H/A DIS, STBY DIS, POLD DIS
Here are the valid MODE SEL combinations
FOR TECHNICAL SUPPORT:
Please call our office at 1.866.410.1134 – 8:00am to 5:00pm Pacific Time
SEE FIGURE 3 DIAGRAM
PAGE 22

18 IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
API INSTALLATIONS
Recirculation Pump Switch to API
This wiring application is typical when a customer desires
their hot-water recirculation pump to shut off during a leak,
so the pump doesn’t continue to push water making the
leak worse, or alternatively to save the pump from burn
out due to pumping with no water in the system.
On the API, place the provided jumper wire between +REF
and the NO terminal of one of the relays on the API.
Connect the red wire from the recirculation pump switch
to COM of the same API relay. Finally, connect the black
wire from the recirculation pump switch to -REF or GND
on the API.
Note 1: This applies a 12-volt signal to the switch
inside the recirculation pump switch, to open a
normally-closed switch, shutting off power to the
recirculation pump.
SEE FIGURE 5 DIAGRAM
PAGE 23

19
IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
JJ
JUMPER
WHT--- 0V
BLK--- 120VAC
RED--- 24VDC/VAC
C. ---BLU
N.C. ---YEL
N.O. ---ORG
PAM-1
IRRIGATION CONTROLLER
MV/P COM
WHT
RED
BLU ORG
ALARM
NC
COM
ALARM
RELAY #1
NONC
COM
NO
+REF
RELAY #2
HOME/AWAY
MODE SEL
IN+
IN-
STANDBY
LED
IN+
IN- -REF
POWER
5.5 x 2.1mm
9-12VDC
v+
GND
POLD
TEST PB
7-H/A ENA, STBY ENA, POLD ENA
6-H/A DIS, STBY ENA, POLD ENA
5-H/A ENA, STBY DIS, POLD ENA
4-H/A DIS, STBY DIS, POLD ENA
3-H/A ENA, STBY ENA, POLD DIS
2-H/A DIS, STBY ENA, POLD DIS
1-H/A ENA, STBY DIS, POLD DIS
0-H/A DIS, STBY DIS, POLD DIS
Here are the valid MODE SEL combinations
Note: This applies a 12-volt signal across the IN- and
IN+ (below STANDBY) terminals on the API, while
the irrigation system is running. You may be able to
start irrigation manually to test that this connection is
functioning properly.
API INSTALLATIONS
Wiring Instructions for a PAM-1
Relay (Irrigation Control Interface
Wiring)
• Connect the blue wire from the PAM-1 to IN- (below
STANDBY) on the API.
• Connect the orange wire from the PAM-1 to –REF
on the API.
• Place a jumper wire from IN+ (below STANDBY) to +REF
on the API.
• Connect the red wire from the PAM-1 to the MV/P
(master valve/ pump) terminal on the irrigation controller.
• Connect the white wire from the PAM-1 to COM on the
irrigation controller.
• The yellow arrow dial on the API should face F.
• When irrigation starts, you should see the Leak Defense
System control panel switch from Home or Away to
Standby. When irrigation stops, the Leak Defense
System should go back to Home or Away.
SEE FIGURE 6 DIAGRAM
PAGE 24

20 IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
Figure 1
General Piping Diagram
FOR TECHNICAL SUPPORT:
Please call our office at 1.866.410.1134
8:00am to 5:00pm Pacific Time