Commissioning of Standard Control System

• Set the clockstat to call for heat (a flame symbol will appear on the clockstats screen)
• Turn up one room stat so it is calling for heat. This will put power to the correct actuator(s) which is controlled by the room stat. The actuators can take up to 4 minutes to open. The manifold pump, boiler pump and boiler will also run via the wiring centre.
• Set the mixer valve to give a flow temperature of 25-30ºC. The system should be left to run at this low temperature until the screed/concrete has cured. It can then be raised to its full operating temperature depending on what type of floor construction it is.
• Concrete full operating flow temperature is 55ºC.
• Timber joist full operating temperature is 60ºC.
• Check in turn that each room stat is operating the correct actuator(s) on the manifold. Remember that the actuators take 2-4 mins to open or close. Leave all stats calling for heat.
• Check the correct operation of the Radiator and/or the DHW circuits and that each of these systems can independently bring on the boiler and boiler pump.
• Set the clockstats time and temperature settings. The lower one to 16ºC (night setback) and the higher one to 25ºC. This is an artificially high setting to make sure that all the room stats receive power when the clients are wanting the house up to the room stat settings. It will not get as hot as the clockstat setting as every area has its own room stat and will be controlled to its setting.
• Set the times on the clockstat, bring the system on (high temp setting) two hours before they want the house up to temperature and switch it to its low temp setting two hours before they retire at night.
• Once the floor has cured (normally 2-3 weeks at low temperature) the 3 port mixer can be set to its correct operating temperature.
• For most of the heating season this temperature 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:- Going into heating season set mixer to 30°C - 40°C.  During the coldest spell set mixer to maximum for floor construction.  Coming out of heating season set mixer to 30°C - 40°C.
• 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.