Water Connection In The Open System - Dimplex Dhwe 50 S Montage- Und Gebrauchsanweisungen

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1 Safety valve
2 Drain pipe safety assembly
3 Non-return valve
4 Drainage siphon
5 Test connections
6 Pressure reducer (optional)
7 Isolating valve
Domestic hot water cylinder
Fig. 2: Water connection in the closed system

3.2. Water connection in the open system

In pressureless flow operation, the water can only be
withdrawn at one point.
Only fittings for open domestic hot water cylin-

ders may be used.
This fitting is installed in the cold water inlet of the

domestic hot water cylinder.
A non-return valve must be installed that guaran-

tees that water can not flow back from the do-
mestic hot water cylinder into the water network.
Domestic hot water cylinder
1 Drain nozzle
2 Non-return valve
3 Isolating valve
Fig. 3: Water connection in the open system
EN-16
Domestic
hot water
drain
Domestic hot
water drain
Fitting
Swivelling outlet
1 2 3 4 5 6
Safety group
Cold water inlet
It is advisable to install a drain nozzle.

Before connection to the power supply, the do-

mestic hot water cylinder must be filled with wa-
ter.
If the water in the device is heated, its volume ex-

pands. This means that the drain pipe of the fitting
starts to drip. This behaviour is related to the func-
tion. Excessive tightening of the two valves on the
fitting can not prevent this dripping.
1 2
Domestic hot water valve red
Cold water valve blue
2204/C
7
Cold
water
inlet
3
Cold
water
supply
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DHWE S