ZIG-TRV-01 ZigBee Thermostatic Radiator Valve Install Guide V1

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1 ZIG-TRV-01 ZigBee Thermostatic Radiator Valve Install Guide V1 Introduction: The ZIG-TRV-01 is a ZigBee thermostatic valve designed to work with radiators. It receives command requests and transmits temperature readings over a ZigBee wireless network. The building fabrication can have an adverse effect on the range of the ZigBee network so range extenders may be required. Product Operation Modes: OFF In this mode, the plunger will be fully down and it will never move. The only way to move the plunger is to change Mode. Auto In this mode, the valve responds to heating setpoint. Heat In this mode, the plunger will be fully retracted and it will never move. The only way to move the plunger is to change Mode. Emergency Heating This mode can be accessed by writing on the attribute or by pressing the button. Button: The button is used for the following: - Outside a network, a button press will toggle the mode between Off and Emergency Heating. - In a network, a short press toggle between Off and Auto while a long press goes to Heat. LED: Full Red 1s On initialisation, the LED remains ON for about 1s until the device is initialised. 2 Green flash every 3s When looking for the network, the device flashes green twice every 3s. 3 Red flash every 3s After the initialisation if the valve cannot find its parent. 2 Orange flash When the valve successfully joins a network, it flashes orange 2 times. 1 Red flash After a button is pressed, mode is now Off.

2 2 Orange flash After a button is pressed, mode is now Auto. 3 Green flash After a button is pressed, mode is now Emergency Heating. 2 Red flash When the button is pressed and the value successfully leaves the network. 4 Red flash When the battery is low (Below 2.4V), the valve flashes its red LED 4 times. Workflow The workflow to follow is:- 1. Power Up the valve 2. Enrol the valve into the Leviton Control system 3. Test the operation adjacent the Leviton controller 4. Test the operation at the valves desired location to check network range 5. Fit the valve 6. Test the valve 1 - Power Up the Valve Remove the valve from the valve from the packaging and put the batteries in the valve. 2 - Enrol the valve into the Leviton Control system The Leviton controller will need a ZIgbee ZIM interface to use this device. Locate yourself with your PC and the valve close to the ZIM. Using PC Access add the thermostat by selecting a thermostat from the thermostat area of Setup and set a name for it. Set the protocol address to Zigbee and type to Heat Only. Click on the address and select enrol. Then press the button on the TRV for 20 seconds to put in enrolment mode. PC Access will discover the device and report that is discovered it successfully and fill in the ZIgbee address. 3 - Test the operation adjacent the Leviton controller Go to the Status tab of PC Access. You should see the TRV as a thermostat and show a valid current temperature and heat set point and mode. Whist still adjacent to the Leviton controller, use PC access to set the heat set point lower than the current temperature. The valve should then set the plunger to be all the way down. Then set the heat set point to be much higher than the current temperature. The plunger should then fully retract into the TRV. 4 - Test the operation at the valves desired location to check network range

3 Now take the TRV to where the TRV is to be located. Repeat the test above to ensure it still operates well. If it stops operating and the current temperature is lost then a ZIgbee range extender will be required to boost the signal. 5 - Fit the valve Remove the Existing Valve: The next step is to remove the existing valve head from your radiator. Chose the Correct Base Ring The ZIG-TVR-01 is supplied with 2 base rings, one 28mm in diameter and the other 30mm in diameter. The 28mm base ring has notches on its inside edge. Select the correct size ring for the valve s base works. This can be done by attempting to screw both rings onto the radiator valve base.

4 Select the Valve Spacer Radiators that have a valve pin that extends more than 12mm from the base ring threads will need a spacer to be fitted inside the base ring. The ZIG-TVR-01 comes with two spacers. Use the 3.5mm thick spacer with 28mm base rings. Use the 2mm thick spacer with the 30mm base rings. If the gap is greater than 14mm, place the spacer in the base before you attach the base ring to your ZIG-TVR-01. Install the ZIG-TRV-01 valve Before screwing the thermostatic valve head onto the base, ensure the ZIG-TRV-01 s pin is fully retracted IN and not extended OUT. If the pin is extended then set the heat set point to be much higher than the current temperature and it should retract all the way inside the valve.

5 With the pin retracted, the ZIG-TRV-01 can be attached to the radiator valve. Do not over tighten the base ring as this could unseat the base ring pegs. Valve Calibration Once the valve is fitted, the mode must be changed to Off by pressing the button once and you should see a red LED flash once. The plunger should extend all the way out so the valve can calculate the distance the plunger needs to travel to shut the valve. Once this has been done then press the button again to turn it on to auto mode and you will see the LED flash orange twice. The calibration should be performed every time the valve is fitted on a radiator even if it s the same one. 6 - Test the valve Now that the valve is fitted it can be tested again. We need to ensure the valve is properly shutting off the valve on the radiator. Do this by setting the heat set point to much lower than the current temperature so the radiator is off. Make sure the boiler is running by turning up the heating in another zone. With the boiler and pump running the radiator in questions should remain cold. Once it is clear the radiator is not heating up, then adjust the heat set point to be higher than the current temperature. You should hear the valve open and the water start to flow in the radiator and it should heat up. 7 Programming The Logic In PC Access we will need to put the logic for the boiler controller. If any thermostat needs heat we need to turn the boiler on. If ALL thermostats do not need heat then we need to turn the boiler off. The best way to do this is to setup a flag for each heating zone and turn the flag on if that zones needs heat and turn the flag of if this zone does not need heat. Then we can simply look at the flags to decide if the boiler should be on or off. The logic we need to manage the flag for a single heating zone might look like this:-

6 Note that if the Zigbee wireless thermostat has a radio failure we will read the current temperature as zero so we not turning the flag on if the value is zero. This will prevent the boiler being on permanently if we had a radio failure for some reason. Also note that the above login basically turning the flag off if the current temperature is greater than or equal to the desired temperature and only turning it on if the current temperature is less that the desired temperature buy more than 0.5 degrees and as mentioned above we are filtering out a radio failure where the current temperature is zero. We need to repeat this for all the heating zones. Then we need some logic to manage the boiler. An example of turning the boiler on might look like this. An example of turning the boiler off might look like this.

7 Most boilers are turned on and off by apply 240v to a connection on the boiler. This can be done using the ZIgbee load control wireless relay or via an Omni Bus 240v relay or a 12v to 240v relay wired into an output on the controller. The above can be checked by using PC Access and connecting to the controller and using the Status tab. You should see the flags representing the heating zones should be set automatically based on current temperature and desired heat set point. Adjust the heat set point to be greater than the current temperature and the associated flag should go to on and vice versa. You should also be able to see the status of the boiler and it should be on or off depending on the requirement. A flag can also be used for the boiler control if desired. Troubleshooting Radiator remains hot when it should be cold: The radiator could be remaining hot because the valve pin is not long enough when extended, to cut off the water flow. Shims, small metal discs can be inserted into the valve to extend the pins length. Remove the valve body and place a shim on to the radiator s base works. Reposition the valve body taking care the shim does not move or obstructs the action of the valve s pin. If the radiator still remains hot then more than one shim may be required. Radiator remains cold when it should be hot: The radiator could be remaining cold because any shims inserted into the valve body may have moved and be preventing the free movement of the valve s pin. If no shims have been used and the radiator remains cold, remove the ZIG-TVR-01 and check if the radiator begins to heat. Should the radiator remain cold, check that the systems boiler, pump and valve are all operational. If this is the case then contact your plumber to investigate further.