A standard UK plug is only designed to carry 13A (around 3,100 watts) Your "device" is using (16A) 3,400 watts, 300watts too many.
You need to get a competent person to either install a 16A Plug and socket (Not normally found in a domestic home) or have the appliance connected to its own radial circuit (which would be better)
If you continue using it as it is, it is very likely it will over heat and cause a fire, and the insurance company will not pay out as it is not an appliance that can be plugged into a normal UK socket.
In Europe they don't have a fuse in the plug, and don't use the ring final system, to use an European appliance designed for a 16 amp supply you need a dedicated supply from the consumer unit.
Some house today do use the radial system, and if that is the case you may be able to get a 15 or 16 amp socket fitted, but since in the main we use the ring final system, in the main we are not permitted to fit a 15/16 amp socket as the supply protective device (fuse, MCB, RCBO) is to large to allow connection.
Unfortunately you can't get a fuse connection unit with a 16A fuse, so you will likely need a dedicated supply, this is unfortunately common when you use European products.
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