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LEED Smart Aquastat Control 32 Installation Guide

Table of Contents

→Download the LEED Smart Aquastat Control 32 Installation Guide

 

LEED Smart Aquastat Control 32 – Installation Guide

Congratulations on purchasing the most advanced microprocessor-controlled, hot water recirculation pump controller made. This system is designed to run the recirculation pump only when you need it thus saving both water and energy. It is designed and built with pride in the USA to provide years of service and savings.

 

Unboxing Your Product

1          LEED Smart Aquastat Control 32 with RJ-45 connector

smart aquastat control32

1          Temperature Sensor with RJ-14 connector.

Temperature Sensors with RJ-14 connectors and RJ-14 Splitter

 

1          ¾” or 1” NPT Flow Sensor with JST connector

¾” or 1” NPT Flow Sensor with JST connector

 

1          Wiring Harness with RJ-45, RJ-14 and JST connectors

Wiring Harness for Smart Thermostatic Control

Parts not included: The following items are needed for the installation, but are not included.

→ Electrical Tape
→ PTFE (Teflon) Tape
→ Wire fasteners for securing wiring to the wall

QUICKSTART GUIDE

 Prior to installation perform the following system test.

    1. Connect the wiring harness to the controller.
    2. Connect the flow meter to the wiring harness.
    3. Connect the temperature sensor to the wiring harness.
    4. Plug the controller into a wall outlet and ensure that the LED on the controller flashes green 3 times.
    5. Blow through the flow meter in the direction of the arrow and ensure the controller makes a slight audible click and the red LED turns on.
  1.  

If this test fails, disconnect all connections and inspect the wires to ensure they are not broken or loose and that the pins in the Y connector are not pushed to one side or the other. NOTE: If the controller blinks fast red, the issue is with a temperature sensor connection at the Y connector. See Troubleshooting item 1.

Quickstart Install

  1. Install the flow meter at the cold water input to the water heater ensuring the arrow on the flow meter points in the direction of flow. 

    NOTE: PTFE tape is necessary when joining to a female NPT connector. PTFE tape is NOT necessary when connecting to a flexible hook-up line as they use a washer to create a seal. If installing in hard copper piping we recommend installing the flow meter using a union fitting.

  2. Attach the temperature sensor to smooth copper piping on the returning hot water line before the return line T’s into the cold water feed and upstream from the check valve. It is preferable to install the sensor upstream from the recirculation pump as the thermal mass of the pump can cause slightly longer run time. Ensure the entire length of the sensor is in contact with the pipe and secure it with electrical tape. 

    Do not attach it to a coupler. 

    Cover the sensor with insulation. The temperature sensor lines can be extended with RJ-14 telephone line extensions if needed. Tested lines can be purchased from the Smart Recirculation Control online store.

  3. Connect the temperature sensor to the wiring harness using the RJ-14 connector, connect the flow meter to the wiring harness and plug the wiring harness into the controller.

  4. Plug the controller into an outlet and plug the pump into the controller. 

  5. Turn a hot water faucet fully on for 1 second and the pump will turn on. If the hot water line is cold the pump will continue to run until hot water recirculates throughout the house and raises the temperature of the return sensor to 105°F (default).


If the pump fails to turn on or run for longer than 5 minutes and the piping feels hot, see Trouble Shooting.

LED Legend:

GREEN LED: will blink 3 times when first plugged in to indicate the unit is functioning correctly
GREEN LED: solid on when a “Smart Timer” is active and pump is not running
GREEN LED: will blink every 10 seconds when no other LED is lit  (e.g. no timer active, pump not running)
RED LED: fast blinking indicates that the temperature sensor is not connected properly
RED LED: solid on when the pump is running whether due to a timer or due to demand
BLUE LED: solid on when connected via the smartphone app

DETAILED INSTRUCTIONS

Please read over the following detailed instructions. If you are not comfortable with any part of them please contact a licensed plumber to perform the installation.

Prior to installation you must perform the system test at the beginning of the Quickstart Guide.

Installation:

  1. Note the setting of the water heater thermostat and then set it to the lowest temperature setting (do not turn off the pilot light).

  2. Shut off the cold water supply to the water heater.

  3. Open the closest hot water faucet to the water heater to depressurize the hot water line. When water quits flowing, turn off the faucet.

  4. Disconnect the cold water supply line from the water heater. Be careful not to bend and crease the supply line when manipulating it. Be prepared with some towels as some water will flow out of the hookup line. You don’t have to drain the tank. As long as all the faucets remain closed you should not get any backflow from the hot water line.

  5. Connect the flow meter to the cold water input of the water heater using PTFE tape being sure that the arrow on the flow meter is pointing toward the water heater.
    Smart Recirculation Control Flow Meter installation Leridian Dynamics
  6. Connect the cold water supply line to the input side of the flow The supply line uses a washer to seal so you don’t need to use PTFE tape on this connection. Hand tighten and turn an additional ¼ to ½ turn. DO NOT OVER-TIGHTEN!

  7. Turn on the cold water supply to the water heater and inspect for leaks. 

  8. Turn the water heater thermostat back to its original temperature setting.

  9. Locate the recirculation pump.
    Temperature Sensor Installation Instructions for hot water recirculation pump control with using Smart Recirculation Control from Leridian Dynamics Temperature Sensor Installation Instructions for hot water recirculation pump control with insulation
  10. Attach the temperature sensor to smooth copper piping upstream from the pump with electrical tape ensuring the entire length of the sensor is in contact with the pipe. Do not attach it to corrugated copper pipe or a coupler. Cover the temperature sensor with insulation. You may install the sensor downstream from the pump however the pump absorbs heat requiring it to run longer before the temp sensor will see the increase in temperature. 

    NOTE 1: If installing in PEX you will need to plumb in a short section of copper pipe to which to attach the temperature sensors. PEX is a pretty good insulator and will cause a lag in the controller sensing the temperature change. 

    Note 2: Temperature sensor MUST be placed before the return line T’s back into the cold water supply line.
  1. Connect the temperature sensor to the wiring harness using the RJ-14 connector ensuring it snaps together securely.

Connect the temperature sensor to the wiring harness using the RJ-14 connector

  1. Connect the flow meter to the wiring harness via the JST connector ensuring it snaps together securely.
    Installation instructions for Smart Recirculation Control units from Leridian Dynamics, Inc. Connect the flow meter to the wiring harness via the JST connector
  2. Secure the wires to the wall away from the water heater.

  3. Plug the wiring harness into the LEED Smart Aquastat Control 32 via the RJ-45 connector ensuring it snaps in securely.

wiring harness Smart Recirculation Control 32 RJ-45 connector

 

  1. Plug the recirculation pump into the LEED Smart Aquastat Control 32 and plug the LEED Smart Aquastat Control 32 into an electrical outlet.
    Smart Recirculation Control 32 and plug
  2. The green LED on the side of the controller will blink 3 times if everything is OK. If the red LED flashes quickly see Trouble Shooting item 1.

  3. Turn a hot water faucet fully on for 1 second. If the hot water line is cold the recirculation pump will turn on. The red LED turns on while the pump is running.

  4. If the hot water line is cold the pump will continue to run until the temperature reaches 105°F (default off value).

  5. The temperature of the sensor and the status of the pump can be monitored via the smartphone app by selecting “Live Data” from the menu.

  6. If the pump fails to turn on when a faucet is fully opened for 1 second, see Trouble Shooting item 2.

  7. If the pump continues to run long after the piping feels hot see Trouble Shooting item 3.

LEED Smart Aquastat Control 32 Setup with SmartPhone

The LEED Smart Aquastat Control 32 can be used simply as an on-demand controller for your recirculation pump or it can be configured to run on a timer via an iPhone or Android smart device so that it will keep the recirculation loop hot between specific times of day and on specific days of the week (up to 10 timers can be set). Even when a timer is active it only runs the pump until the recirculation loop has heated up and then it shuts the pump off while continuing to monitor the recirculation loop temperature.

The app uses Bluetooth in order to communicate with the controller so you need to be sure that Bluetooth is enabled on your smart device. The app can be downloaded for free from either Google Play  Android app from Leridian Dynamics for Smart Recirculation Control or Apple App Store  iPhone app from Leridian Dynamics for Smart Recirculation Control. Do not “pair” the Bluetooth device, running the app will find and connect to the Smart Recirculation Control 32 and display the “Live Data”TM. The blue LED on the controller will illuminate when the app is connected.

Live Data (initial screen displayed):

This screen displays the temperature sensor value, the flow meter value and whether the pump is running or there is a timer active. There is also a “Trigger Pump” button to activate the controller from the app. This screen is useful for troubleshooting and configuration of the controller. For example, if you find that the controller isn’t turning on when hot water is drawn from a faucet, this screen will show you the flow value the controller is seeing. If the value is less than the Sensitivity setting, the controller will not turn on. If the flow is greater than the Sensitivity setting and the controller doesn’t turn on then the temperature is greater than the high temperature value in the Temperature Range setting.

Settings:

This screen provides for controlling all the settings of the firmware. There is a list of basic settings and the ability to expand the settings to show “Advanced Settings”.

Basic Settings

Sensitivity

The sensitivity setting allows the user to set how many pulses of the flow meter are required to turn the controller on. The default value is 20 which is fine for most installations. If you find that the controller is not turning on when you turn a faucet on and off, you would decrease this value to make the controller more sensitive to flow (require fewer pulses to turn the controller on). Correspondingly, if you find that the controller is turning on when there is no timer active and no hot water being drawn, you would increase this number to make the unit less sensitive to fluctuations in flow (require more pulses to turn the controller on).

Temperature Range 

The temperature range setting allows the user to set the temperature values that cause the controller to turn the pump on and off. When a timer is active or the controller senses flow, it compares the temperature sensor value to the configured low temperature and if is less than this value (default of 100°F) it turns the pump on. It will continue to run the pump until the temperature is greater than the configured high temperature (default of 105°F). You need to ensure that your water heater is set to a temperature greater than the high temperature setting or the pump will never turn off.

Temperature Increase

LEED requires that the pump turn off once there has been a 10F° rise in temperature in the recirculation loop. This setting allows this value to be modified. However, LEED does not specify how long the pump should remain off once the rise has been achieved. With our demand-based control, the flow would cause the pump to immediately turn back on once the rise has been achieved but the high-temperature value has not. To prevent this type of fast cycling there is a “Dormant Interval” under “Advanced Settings” that has a default value of 10 minutes.

Max Pump Run Time

LEED specifies that the pump should run no longer than 5 in a given cycle. This setting allows you to modify this value.

Timers Enabled

LEED requires the pump to be triggered by demand only and therefore the timers are disabled by default. This switch enables and disables the timers. This can be used to turn the timers off when you go away on vacation or to simply turn them off if you just want to use the on-demand feature of the controller. The LEED Smart Aquastat Control 32 implements “Smart Timers” which, regardless of this setting, will automatically disable if no hot water usage is detected within 24 hours. The timers are re-enabled as soon as hot water flow is detected or the controller is connected to via the app.

Advanced Settings

Dormant Interval

The dormant interval is the number of minutes that the controller lies dormant after achieving the “Temperature Increase” value (default 10F°). The default value is 10 minutes which is fine for most installations.

Flow Meter Delay

The flow meter delay is the amount of time in hundredths of a second during which the controller counts the number of pulses that occur in the flow meter. If the number of pulses counted is above the sensitivity threshold then the controller deems that there is flow in the hot water line. The default value is 75 hundredths of a second which is fine for most installations.

Bluetooth Advertising Power

This is the power at which the Bluetooth radio advertises its presence. The app searches for this signal when connecting. The higher this value the further away from the controller the app can find and connect to the controller. The default value is 5.

Bluetooth Transmission Power

This is the power at which the Bluetooth radio communicates with the app once its presence is detected. The higher this value the further away from the controller the app can be taken once the app is connected. The default value is 5.

Reset to Factory

This will reset the LEED Smart Aquastat Control 32 back to the factory defaults. If the controller isn’t operating as expected, resetting to the factory defaults is a good thing to try to resolve the issue. You must type “yes” when prompted in order for the factory reset to take place.

Timers

This screen displays the timers. They are black when the timers are enabled. If they are gray then they are disabled. Tap the timer to edit or delete it. To add a new timer tap the Add Timer button.

The real-time clock in the LEED Smart Aquastat Control 32 is set when you connect to the controller with your smartphone. The LEED Smart Aquastat Control 32 has a built-in power backup that will keep the clock’s time for approximately 48 hours without power. After which the clock will lose its time and the controller’s timers won’t function until the time is set by running the app and connecting to the LEED Smart Aquastat Control 32.

The clock does not adjust for daylight savings time so when the time changes you will need to connect to the LEED Smart Aquastat Control 32 with your smart device and the time will be set to the time of your smart device.

Log

Displays a rolling log of the last 256 controller activations.

Firmware

The firmware of the LEED Smart Aquastat Control 32 can be updated via the smartphone app. The app will notify you when you first connect if there is a new firmware available and selecting OK will navigate you to the Firmware screen.

By default only the firmware your type of controller will be displayed and if there is an update available it will be enabled. Tap on the firmware and then tap the “Update Firmware” button and the controller will begin the update process. Do not allow the application to go to the background or the phone to sleep while the firmware update is running. If the firmware is already installed it will be gray and not able to be selected.

There is an option on this screen to “Show All Firmware Versions” which will display the firmware from our entire product line. The sensor requirements are different for the different firmware versions so updating to a different product without understanding the implications may provide unexpected results. Please see our web site for a description of the different products.

Trouble Shooting

1. SYMPTOM: Red LED flashes quickly after it is plugged in and never stops.

ISSUE: The LEED Smart Aquastat Control 32 is not able to get temperature information from the temperature sensor.

RESOLUTION: Unplug the LEED Smart Aquastat Control 32 from the wall, disconnect the temperature sensor connector at the coupler and disconnect the coupler from the wiring harness. Inspect the pins in the coupler and ensure they are not pushed to one side or the other. If they are you can straighten them with a small screwdriver or pen knife. If they are not visibly bent then it can help to wiggle the RJ-14 connectors as you insert them to ensure the pins drop into the slot in the connector and make solid contact. Reconnect the temperature sensor ensuring it snaps firmly into the connector. Plug the LEED Smart Aquastat Control 32 back into the wall outlet.
 

2. SYMPTOM: Pump won’t turn on when hot water is drawn from a faucet.

 
ISSUE 1: If the temperature of the water at the temperature sensor is greater than the low temperature value configured in Settings→Temperature Range the pump won’t turn on when flow is detected.
 
RESOLUTION 1: Open the smartphone app and go to the menu and select “Live Data”TM. If the temperature is above the configured high-temperature value, wait until the temperature drops below the configured low-temperature value or increase the low-temperature value via the smartphone app and test it again. If the temperature is below the configured low temperature value see ISSUE 2.
 
ISSUE 2: The Settings → Sensitivity value is set too high for the controller to detect the flow provided by the faucet.
 
RESOLUTION 2: Open the smartphone app and go to the menu and select “Live Data”TM. This will show what flow value the controller is sensing. Turn the hot water faucet fully on and watch the flow value. If it goes greater than 20 then the pump will turn on. If it doesn’t go greater than 20 then you will need to reduce the sensitivity value to be less than the maximum value you observed. 
 
NOTE: If you are seeing very low flow at the faucet it is possible the aerator in the faucet is clogged. Removing it and tapping it to remove any accumulated sediment can restore the flow, but they are inexpensive so replacing it is recommended.
 

3. SYMPTOM: The pump continues to run even though the piping feels hot.

 
ISSUE: The controller isn’t sensing a temperature greater than the configured high temperature.
 
RESOLUTION 1: Ensure that the temperature sensor is securely connected to the copper piping on the return line, covered with pipe insulation and is connected to the piping before it T’s into the cold water feed into the water heater. If it is loose, re-secure it in place with electrical tape, cover it with insulation and test it again. If it continues to run see RESOLUTION 2.
 
RESOLUTION 2: Open the smartphone app and go to the menu and select “Live Data”TM. It will display the temperature value. If this value is less than the high-temperature setting configured in Settings → Temperature Range (default 105°F) then the pump won’t turn off. Adjust the Temperature Range values down so that the high value is less than the observed value and the pump will turn off.
 

4. SYMPTOM: The pump turns on when no hot water is being drawn.

 
ISSUE: Pressure spikes in the cold water supply line caused by abrupt turning on or off of the cold water (for instance when a toilet fills or a sprinkler system turns on or by fluctuations in the feed from the utility company) can cause the LEED Smart Aquastat Control 32 to trigger the hot water recirculation pump to turn on.
 
RESOLUTION: The sensitivity value of the LEED Smart Aquastat Control 32 is too low and should be adjusted higher. The default value of 20 works well, but can be susceptible to these false triggers. It is recommended to increase it by 5 pulses at a time to filter out these anomalies.
 

5. SYMPTOM: No flow is seen on the “Live Data”TM screen when a faucet is opened.

 
ISSUE 1: A wire connecting the flow meter is broken.
 
RESOLUTION: Inspect the wiring harness where it connects to the flow meter to ensure none of the three wires appear broken. If they are contact Leridian Dynamics to get a replacement harness. If it looks good see ISSUE 2.
 
ISSUE 2: Sediment or scale is blocking the flow meter.
 
RESOLUTION: To ensure that this is indeed the issue perform the following test. Remove the sensor from the flow meter that is held on with 2 small silver screws (don’t worry, it won’t leak water when the sensor is removed). Start the smartphone app, view the “Live Data” screen, and quickly wave a magnet back and forth over the sensor. You should see the flow value change. The flow meter works by spinning a magnet on a turbine that is read by the sensor. If you see a flow value in the smartphone app then the flow meter is blocked with sediment or scale and will need to be removed and cleaned. If you do not see a flow value then there is an issue with the sensor and/or the wiring harness and it will have to be replaced.