When the underfloor heating circuit load exceeds 2kW ~ 2.4kW (10A~12A) we recommend that a suitably rated contactor must be used.
It is not good practice to operate the thermostat at its full 16A rating. Reducing the load by 25% extends the thermostat’s contact life by 100%.
We offer a 20 Amp rated contactor (order code 2510) that will switch a load of up to 5.4 kW (5,400 Watts) and a 40 Amp contactor (order code 2511) that will switch a load of up to 8.6kW ( 8,600 Watts).
When a contactor is mounted alongside an MCB of greater than 10 A current rating or two contactors are mounted alongside an MCB or side by side, it is necessary to insert a blank module between them to avoid excessive heat build up.
For more product information visit www.floor-heating.co.uk