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Smart Heating part2: how to connect thermostat and smart radiator valves

This is part 2 of blog series about smart heating system installation. You can find part 1 here: Smart Heating part 1: choosing boiler and thermostat

To install radiator valves of Netatmo is very easy. But for this setup i need to have one Thermostat connected to boiler.  As radiator valves connects to thermostat for control of boiler. Boiler is turned on when heat is needed and turned off when the temperature in the room reach setpoint.

Netatmo Thermostat has to parts. One is the thermostat itself and the second part is wireless relay.

The relay has two wires. One for 220V power supply and the other for boiler control. The control of boiler is simple, dry contact relay. It turns on or turns off the boiler when needed.

To attach relay to boiler you need to access the boilers control terminals.  It is quite easy to do. But first – disconnect power supply to boiler by switching off boiler power circuit breaker.

Then, remove the front cover of boiler

Find the terminal for connecting dry contact thermostat and connect Netatmo relay to it. Also connect relay to power supply.

With first thermostat connected to boiler now it’s time to configure it in Netatmo energy application. Place the thermostat in any room and you have remote control of your heating system. The disadvantage of one thermostat in house is that temperature is measured in one specific place and all heating components are turned on or off by this one room. With radiators it is bad, because you get uneven temperature in individuals rooms. When one room needs to be heated – all radiators in all rooms are hot.

Here comes Smart Radiator valves.

In the box of Netatmo smart radiator valve are:  radiator valve, batteries for it, stickers to change the look of the valve and adaptors for different radiator types.

To attach smart radiator valve, remove the cap of the radiators valve body.

Using the provided template find the right Netatmo adaptor and mount in on radiator valve body.

Then screw Netatmo Smart radiar valve on radiator.

For insert the batteries, remove the cap of the side of valve.

After the batteries are inserted, the valve shows its number for identification for adding it to thermostat on Netatmo app.

To configure Smart radiator valve, just follow instructions in application

Netatmo radiator valves

Repeat this for other radiators in home.

In the end, I have nice looking thermostatic valves on radiators. The temperature of the room can be controlled by turning the valve on radiator or in the application on the phone or even by voice using Siri (or other voice assistant). I can set the schedule for specific temperatures in any room at desired time. I choose to keep 20.5’C during the night and 21,5’C during the day. And while experimenting with boiler, I have found that the best temperature from boiler to radiators for my home is 60’C.  This water temperature is set on boiler and does not need to be changed.

That’s it with radiators. Next i will show you how to connect Netatmo thermostat to under-fool heating control. And after this, will add all heating regulation devices to Apple home for automation and voice control.

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