A1 Kit for installation in open expansion tank, without the production of sanitary water, coupled with gas boiler for heating.
In this kit, the second pump is already included, are high-efficiency pumps.
With this kit the water circulating in the Thermo fireplace does not mix with the boiler, isolating it from the system.
The recommended schedule is shown in the diagram. The kit is supplied as shown on the picture and contains the parts inside the blue box of the diagram; includes electronic graphic control unit.