Id.Nr.: 243701-0
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12.2 NON-PRESSURE CONNECTION
In cases in which fittings are used for non-pressure connection (mixer units), a non-pressure
connection can also be made for pressure-resistant storage tanks.
No safety valve is required in the cold water inflow pipe, although a back-flow valve, shut-off valve
and drainage valve are!
This type of connection is beneficial when just one hot water extraction point is required.
With the control device (mixing unit), the operation of the storage tank takes place via the hot water
valve - this acts as a shutoff device in the storage tank's cold water inlet pipe. This means that hot
water abstraction from the storage tank will be caused by the hot water valve opening and cold
water being forced from below into the heat storage boiler and in this way the hot water will flow out
freely through the hot water outlet via the mixing unit.
The operating mechanisms for non-pressure connection are constructed in such a way that the
hot water outlet remains open even if the hot water and cold water valves are closed and thus the
storage boiler is connected with the external air. The excess water which occurs during the heating
process can flow unhindered through the hot water outlet.
If necessary, the storage tank can be separated from the cold water pipe system using the shut-off
valve and can be drained via the drainage valve.
In order to allow for a trouble-free repair, a removal or exchange of the device, it is necessary to esta-
blish the connection of the tank by means of a detachable connection (Dutch). Tank leaks as a result
of an improper connection and resulting damage and consequential damage are excluded from the
warranty and product liability.
