I am installing a GB162 can I used external 240vac controls to operate the boiler?

The GB162 works off a volt free enable to set a demand, it is possible to use external 240vac controls to operate the boiler by using an RTH convertor.

The RTH convertor is a 240vac to volt free relay box, this will come supplied in the box with the 50kW and 60kW version of the GB162 but not with the 80kW and 100kW versions.