Single and Multi Zone Options
Packs are available which contain either a single programmable thermostat (which offers time and temperature control via the one thermostat) or several thermostats and one central time switch. When underfloor heating is installed, the whole floor heats up and effectively becomes your radiator. To control this radiator we need to incorporate some sort of control. On a traditional radiator system, a TRV (thermostatic radiator valve) would usually be fitted to the radiator, which senses the temperature then responds by allowing a flow of water around the radiator. Underfloor heating differs slightly although the concept is the same. If underfloor heating is installed in a single room then the programmable thermostat would wire directly to the underfloor heating pump and to the zone valve. The thermostat would send a demand to run the pump and open the zone which would allow a flow of hot water to the underfloor heating.
In an underfloor heating system that has several thermostats included, the thermostats would be wired back to a wiring centre which is to be fitted above the manifold. When a thermostat calls for heat, a demand signal is sent to the wiring centre which will run the underfloor heating pump, open the zone valve and also open the port on the manifold (controlled by an actuator). When power is applied to the thermal actuator, it will open and allow a flow of water around an underfloor heating coil. This way it is possible to have several thermostats incorporated into your system.
