Plumbing connections for accessoriesSafety groupCAUTIONA safety device must be connected to the hot water tank.When water is heated to 60 °C, it expands by 2%. A pressure tank could burst without a safety valvekeeping excess water out. The safety valve should therefore drip during warming up.Installation:The following should be remembered during installation:a.The double nut is attached to the water heater’s cold waterpipe so that the arrows are pointing in towards the waterheater (in the direction of the flow). The joint with the waterheater is sealed using a threaded washer.b.The joint between the double nut and the system is sealedusing fibre packing.c.The rubber ring seal (the O-ring) is fitted to the unit so that itcan function as a seal between the safety valve and the unit insuch a way that the valve is locked.The end of the overflow pipe must be visible, and it must be able to run out safely via the drain.ATTENTIONAs water expands as it heats up, the safety valve will drip.ATTENTIONIt is up to the installation engineer to tell the customer where the safety valve is and how itworks, and also that it must be regularly checked at least twice a year in order to preventincrustation.42