Plumbing connections for accessories
Safety group
CAUTION
A 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 valve
keeping 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 water pipe so that the arrows are pointing in
towards the water heater (in the direction of the
flow). The joint with the water heater is sealed
using a threaded washer.
b.
The joint between the double nut and the unit is
sealed using fibre packing.
c.
The rubber ring seal (the O-ring) is fitted to the
unit so that it can function as a seal between the
safety valve and the unit in such 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.
ATTENTION
As water expands as it heats up, the safety valve will drip.
ATTENTION
It is up to the installation engineer to tell the customer where the safety valve is and how it
works, and also that it must be regularly checked at least twice a year in order to prevent
incrustation.
VP18 M2 (English) BY NILAN
27
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