ThermoSphere dual controls are compatible with almost all electric underfloor heating (UFH) systems available. ThermoSphere dual control can replace your existing underfloor heating thermostat as it’s compatible with many of the most popular thermostat brands’ floor sensor probes including those rated at:
Check you’ve got everything:
You will also need:
Your thermostat should be:
Switch off mains power
You will be installing your thermostat as part of a high voltage mains electrical circuit. To ensure your safety and to protect the thermostat, switch off the mains power before you start the installation.
Choose a location
At this stage it its likely that an RCD protected electric underfloor heating system has been installed and a back box is already in place. The underfloor heating cold tail should be pulled up through the back box, and the sensor probe installed (in the conduit provided) within the wall cavity or pre chased channel in a solid wall.
Maximum distances
Your thermostat can be installed up to 50m away from the underfloor heating system it is controlling, provided that the floor sensor is used to control the temperature. Underfloor heating cold tails and floor sensor probes can be extended up to 50m.
Wiring diagram
Connect to the underfloor heating (UFH) cold tail, additional appliance, power supply and floor temperature sensor. The floor temperature sensor is not polarity sensitive.
Fix to the wall
Use a small flat screwdriver in the groove on the underside to lever the face plate away from the back plate. Carefully disconnect the ribbon cable and align your thermostat with the mounting positions on the pre-installed back box. Fix in place with the screws provided. Now connect the ribbon cable and clip the face plate back into position.
Switching on your system
Follow the tile adhesive and levelling compound manufacturers‘ instructions in relation to curing times. Do not turn on your underfloor heating system until all adhesives and levelling compounds have fully cured. When you switch the thermostat on the screen will show the measured floor temperature by default. Increase the temperature manually by no more than 3 degrees per day to test the system. Maximum temperature should not exceed 27 degrees.
Time & date
Set the current date and time.
Heating schedule
Set the automatic schedule for your underfloor heating and an additional appliance.
Display settings
Change the backlight timer as well as the minimum brightness. Select the home screen wallpaper from 8 different colours and set the screen orientation to portrait or landscape.
Pre set temperatures
Pre set comfort, eco and holiday temperatures.
Sensor mode
Select either floor, ambient or ambient with floor limit sensor modes. Ambient with floor limit will react to the ambient temperature primarily, but will switch off if the floor temperature gets too high.
Advanced settings
Floor and ambient temp calibration, Sensor calibration, switch rail and UFH controls on and off, change the language, factory reset, set your temperature limits.
Set the time and date
When you first switch our thermostat on, you will need to set the current time and date. You can do this by pressing Menu
Heating schedule
Setting up a schedule ensures energy efficiency and convenience by automatically changing the temperature of your underfloor heating system. Each day of the week can be programmed independently. There are 6 heating events for every day. Most people treat them as 3 on/off cycles. Start setting up your underfloor heating schedule on page 16.
A typical heating schedule
Everyone is different, but typical heating schedule for a working family would have the heating on in the morning and evening during the week. At weekends heating can be on in the morning, for a period in the afternoon and then again in the evening. You can adjust the time and temperature of any of these heating events to suit your lifestyle.
Appliance schedule
Appliance controls
You can control another appliance, such as an electric heated towel rail from the home screen.
On
The appliance will stay on until you turn it off again.
Schedule
The appliance will switch on and off according to theappliance heating schedule
Appliance boost
Switches the appliance on for one hour, 2 hours or 4 hours and then back to the appliance heating schedule.
Your thermostat has several preset heating modes that can be adjusted in the settings menu.
Eco
Maintains a low temperature, usually between 16 -18°C, to save money on energy bills while keeping the chill off your floor
Comfort
Maintains a higher temperature, usually between 22 – 27°C, that will keep you warm on a cold day!
Schedule
Your thermostat will follow the temperatures and times set up in your heating schedule. You can manually override the schedule using the up and down arrows to select a different temperature. Your thermostat will maintain the boost temperature until the next scheduled heating event.
Manual
You can manually select any temperature and must make all temperature changes yourself.
Holiday
Maintains a low frost protection temperature, usually between 5 – 10°C, while you are away. Your heating system is off, but will switch on automatically if the temperature gets too cold.
Adaptive Start
With the Adaptive Start feature enabled, your thermostat will measure how long it takes for your individual floor to heat up and ensure the target temperature is achieved at the set time. So if you set your heating schedule to 24°C at 07:00, the floor will be at 24°C at 07:00. No need to set the heating to come on early! Your thermostat starts learning from the first time you enable the heating schedule. It turns on an hour early to start with and gradually optimises the heat up time over 7 days.
Open Window Detector
When the Open Window Detection feature is enabled, Your thermostat can detect sudden drops in temperature and will switch off your heating to eliminate wasted energy. Your thermostat will come back on after 30 minutes, provided the temperature has stabilised.
Adjusting the advanced settings
| MENU | DESCRIPTION | RANGE | DEFAULT |
| 01 | Maximum Temp Limit | 5°C ~ 40°C | 27°C |
| 02 | Minimum Temp Limit | 5°C ~ 15°C | 5°C |
| 03 | Maximum Set Temperature | 5°C ~ 40°C | 35°C |
| 04 | Floor Temperature Calibration | -10°C ~ 10°C | 0°C |
| 05 | Ambient Temp. Calibration | -10°C ~ 10°C | 0°C |
| 06 | Sensor Calibration | See page 30 | 10kÙ |
| 07 | Rail Control | ON, OFF | OFF |
| 08 | Language | English, French, German | English |
| MENU | DESCRIPTION | RANGE | DEFAULT |
| 9 | Factory reset | Re (yes) | |
| 10 | Adaptive Start | 1 (On), 0 (Off) | Off |
| 11 | Open Window Detection | 1 (On), 0 (Off) | Off |
| 12 | OWD Off Time | 2 – 30 minutes | 15 mins |
| 13 | OWD Temperature Drop Limit | 2, 3 or 4°C | 2°C |
| 14 | OWD Heating on again after | 10 – 60 minutes | 30 mins |
Compatible sensor probes
Your thermostat can be calibrated to work with some of the most popular sensor probes available.
ThermoSphere
Download Manual:
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