Underfloor heating extension pack operating instructions

Underfloor heating requires a different approach to control compared to conventional heating systems.

There are two main elements of control for your Begetube Underfloor Heating System:

1. Programmable Clock Stat for Night Setback control.
2. 3 Port Mixer for water Temperature control.

Programmable Clock Stat: This Unit gives you the ability to set overall time temperature control with two different temperature settings.  When you want your room to be at full comfort settings you programme the clockstat to call for the temperature you want (typically 21°C).  When you want your house to be at the night setback temperature you programme the clock stat to call for a setback temperature (typically 16°C).  Setting the clockstat to the night setback temperature will turn the boiler and pumps off until the temperature drops to 16°C at the clockstat.  The temperature will only drop to 16°C if you have a lot of heat loss from your building (i.e. a very cold night).  By having this setback control, it stops the room cooling right down during the night so it is not then struggling to bring the room up to a working temperature in the morning.  To set the time and temperatures on the clockstat refer to the user instructions for the clockstat.  If you want your room up to temperature by 08:00 set the clockstat to the higher temperature setting at 06:00.  If you retire to bed at 23:00 you can set the clockstat to the lower temperature setting at 21:00.  There is approximately a two hour lead time and a two hour lag out time.

3 Port Mixer for Water Temperature Control: This piece of equipment is situated at the manifold and its purpose is to blend down the high temperature water from your boiler to a lower temperature suitable for underfloor heating.  The maximum temperature setting for the 3 Port Mixer is dependant on the floor construction:

Screeded Floors have a maximum flow temperature of 55°C.

For most of the heating season these temperatures can be reduced by up to 20°C depending on the outside air temperature. This will aid overall comfort levels and increase the economy of your floor heating system.

Thus typical settings are:

1. Going into heating season set mixer to 30°C - 40°C.
   
   
2. During the coldest spell set mixer to maximum for floor construction.
   
   
3. Coming out of heating season set mixer to 30°C - 40°C.
   
   
4. One of the main points to remember when controlling your system is that switching your system on and off several times a day is false economy.  Keeping your floor at a constant temperature is more economical and will give you better comfort level.