Polypipe Underfloor Heating Room Temperature Controls

Room Temperature Controls
In general an underfloor heating systems control setup will have - room thermostats,  a master wiring centre, slave units, used for multiple room control, zone valve and actuators.

Controlling under floor heating
The control of under floor heating systems is different to that of conventional radiator systems, as the space should not be allowed to cool completely during the heating season. The temperature during unoccupied or night time periods should fall to around 4°C lower than the occupied temperature. This lower temperature setting is known as the set-back temperature, e.g. occupied temperature normally 21°C, set-back temperature normally 17°C.

Individual room control
Polyplumb Manifolds and Controls allow each room to be both time and temperature controlled using a programmable room thermostat. Each thermostat is wired to a master wiring centre and slave unit, which in turns operates the relevant manifold actuator/s, the under floor heating pump, and the two-port zone valve.
The master wiring centre is also capable of providing either a 230V or a Volt free switched live supply to signal the boiler. As individual rooms reach their set point temperature or when the system is operating in ‘set back’ mode the master wiring centre will de-energise the pump and zone valve and the signal to the boiler will be cut, ensuring that maximum comfort levels and system efficiencies are achieved and maintained at all times.

The number of control zones you require will depend on the number of rooms you wish to control individually. 4, 6 and 8 zone packs describe the number of areas you wish to control, not necessarily the number of circuits you are supplying from that manifold. To optimise the use of each control pack use the following rough guidelines:
- The 4 zone pack needs 4 room thermostats; the 6 zone pack needs 6 room thermostats; and the 8 zone pack needs 8 room thermostats
- Each room thermostat can control 1 zone and up to 4 actuators
- Rooms over 40m2 should be allocated as 2 zones and have 2 room thermostats
- An actuator is required on each circuit that requires control

Underfloor heating - what are manifolds and water controls used for (pdf)