Call for heat is an automation that allows you to programme your smart radiator valves to have the ability to call for heat and turn on and off your smart Lightwave heating system which in most cases is our wireless thermostat and a boiler switch.

 

> Our Radiator valves need to be set up as CALLERS (need heat)

 

> The wireless thermostat needs to be set up as the PROVIDER (supply heat)

 

In call for heat you can have multiple “callers” all talking back to one “Provider”

Thermostat in most cases is the Provider, and TRVs are Callers

So if a “Caller” is cold and needs heat, it will ask the Thermostat “Provider” for heat, the Thermostat then will send a wireless command to the boiler switch to turn the heating ON.

This automation allows you to have intelligent smart zonal control over your property, meaning each room can be set to your desired temperatures and the Lightwave heating system will turn on and off accordingly to ensure each room heating temperature schedules are always met.

 

Before setting up "CALL FOR HEAT" you must do the following:

 

- Remove any automations that you may already have set up for your smart thermostat (this shortly will be set up as a provider) This must be done as we do not want the thermostat to turn on and off your heating system, we want the radiator valves (callers) to talk to the thermostat (provider) to then turn on and off your heating system. So the thermostat does not need to be programmed with a schedule as it will simply do whatever each radiator valve asks it to do.

- Set up a schedule on each smart radiator valve instead of the smart thermostat - The Call for heat automation follows each TRV schedule. So you MUST set schedules for each of your smart radiator valves based on when you want them to “call for heat”

 

Your now ready to set up Call for Heat

 

APP SET UP

Select CALL FOR HEAT in the automation section of the Lightwave app

CALLERS PAGE

Select the radiator valves that you would like to be able to control your Lightwave thermostat

and press NEXT

PROVIDERS PAGE

Select ONE smart thermostat and press NEXT–

in most cases this is the Lightwave thermostat or the Honeywell thermostat

SUMMARY PAGE

please give your automation a name and save it –

 

Example below:

 

Things to be mindful of when “Call for Heat” has been set up 

When call for heat has been activated you will notice that the thermostat (PROVIDER) will show the temperature as 40C – please do not be alarmed, this simply means the boiler has been turned ON. The temp is set to this so the radiator valve can reach its desired temperate without the boiler turning off first.

 

Example below

> HR91 (Honeywell rad valve) - Has already reached its desired temp and has no flame symbol meaning the radiator is off

> LW922 (Lightwave rad valve) - Has not reached its desired temperature so it is calling for heat and the Flame symbol is present

> Lightwave stat - Set to 40 this simply means the heating system is ON

 

When call for heat has been De-activated you will notice that the thermostat (PROVIDER) will show the temperature as 0C –this simply means the boiler has been turned OFF and the callers (radiator valves) have reached the desired temperature

 

Example below

> All devices have NO Flame symbol and the heating is OFF - you can see from the image above the provider is set to 0c

> Please note that the Honeywell stat still is highlighted orange that does not mean it is on please use the flame symbol as a reference as to if the valve is on or off

 

If you would not want 40C and 0C to be used, you will need to delete the "Call for Heat" automation and set up individual schedule's for all of your heating devices via the app.

 

A Lightwave heating set up is required for the call for heat function to work.

 

 

A list of devices that can be used in this automation are:

 

CALLERS: (NEED HEAT)

LW922 - Lightwave smart radiator valve

HR91 - Honeywell smart radiator valve

LW921 - Lightwave wireless Thermostat

T87RF - Honeywell Thermostat

DTS92E - Honeywell Thermostat

 

PROVIDERS (SUPPLY HEAT)

L92 - Smart Heating Switch 

LW920 - Boiler switch

LW934 - Lightwave Electric Switch (attached to electric heaters/towel rails)

L82 or L83 – Lightwave Relays (attached to boilers/electric heaters/towel rails/underfloor heating)

L42 – Lightwave Plug socket (electric heater could be plugged into it)

 

Examples of how some of the above devices can be used in the "call for heat" automation

 

> A Lightwave or Honeywell wireless thermostat can be set up as a “Caller” and the provider could be a relay connected to a boiler or electric heater.

> The wireless thermostats can also be set up callers to turn on our smart plug sockets with an electric space heater plugged into it (as a provider)

> You can also use call for heat to set up electric under floor heating.

So each underfloor heating zone can be wired to our relays (providers) and you could have a wireless thermostat in each room/zone (callers) – A wireless thermostat (caller) will tell the app what the temperate is and turn on and off the relay(provider) when it needs to.

 

Please do not hesitate to contact us to discuss further if you feel you have a complex heating set up and need some advice.