Control Systems
Air Temperature Controls
Electronic thermostat(s) are used to control the temperature of each room or zone. A zone is defined as an area that has one or more coil dedicated to heating the area. A coil can heat an area up to 14m square, so large area may require two or more coils. Packs are available that have one programmable thermostat (which offers time and temperature control via the thermostat itself) for heating single areas, such as a one room extension or a conservatory. In a typical ground floor, several thermostats would be used to control the temperature in the different rooms. In this situation, a time clock will also be supplied for controlling the system.
A zone is an area that requires its own thermostat to control the temperature of the room. In the example below the room has 3 zones and hence 3 thermostats. The example shows the WC linked in with the hall way with one thermostat controlling the temperature of the two rooms.
Due to the reduced floor area and increased ventilation rate, in a bathroom or an en suite we recommend supplementing the heat with a thermostatically controlled towel rail. The UFH within a bathroom or an en suite should be controlled with the nearest adjacent zone. For example, an en suite should be controlled with its corresponding bedroom and a bathroom should be controlled by the hall or landing thermostat.
Water Temperature Controls
The UFH will require a low water temperature, usually 35-45°C. To achieve this temperature we must blend the water taken directly from the boiler (typically around 80°C) with the low temperature water from the return of the underfloor heating circuits. To achieve this, we use the Control Pack, which is supplied pre-assembled ready to be bolted onto the manifold, which is the distribution point for the UFH. Both of which are included within every Pro Underfloor Pack.
Example Zone Layout
