Thermostats and Floor Sensor

It is normal practice to site the floor heating thermostat within the room to be heated, however for bathrooms the thermostat is required to be sited outside.

Connection is only required at one end of the twin conductor cable mats. The first 3 metres of black connection cable can be cut as required. The red heating cable must never be cut or shortened.

A 13 amp thermostat will control a maximum wattage of 3000 watts.

The maximum equivalent combination Cablewarm® heating mats in the Cablewarm160® range is the FHM2960 heating mat (18.4m2)

The maximum equivalent combination Cablewarm® heating mats in the Cablewarm200® range is the FHMC3000 heating mat (15m2)

A 16 amp thermostat will control a maximum wattage of 3680 watts.

The maximum equivalent combination Cablewarm® heating mats in the Cablewarm160® range is the FHM3550 heating mat (22.1m2)

The maximum equivalent combination Cablewarm® heating mats in the Cablewarm200® range is the FHMC3600 heating mat (18m2)

If two or more Cablewarm® heating mats are connected to the thermostat a simple electrician’s connector block of suitable ampage loading should be used. Any attempt to connect more than a single wire directly into the thermostat terminals may result in damage to the thermostat terminal and invalidate the manufacturer’s guarantee.

There are 2 options to control larger installations in excess of 3600 watts:

Option 1 - Divide the heated areas into separate zones, controlled by individual thermostats, up to the maximum – as above.

Option 2 - A contactor is required to control your Cablewarm® heating system with a single thermostat – see below.

Contactors

A Contactor can be used where a single thermostat is required to control a total area of underfloor heating in excess of 3600 watts or a total loading exceeding 16 amps.

The Floor Heating Contactor will control up to a maximum of 22,000 watts or 96 amps total loading:

Maximum Cablewarm160® heating mats up to 137m2

Maximum Cablewarm200® heating mats up to 110m2

For more information on contactors click here.