Dimplex DHWE 50S Installation And Operating Instructions Manual page 13

Fig.2: Safety assembly
Fig. 2: Safety assembly and Installation closed, pressurized system
4.2 Installation in a open, non-pressurized system
An open-circuit, non-pressurised system (Fig. 3) re-
quires the installation of a non-return valve at the water
inlet to prevent water draining out from the tank in the
event of the water supply running dry.
 This installation mode requires the use of an in-
stantaneous mixing tap.

As the heating of water expands its volume, this
causes the tap to drip. The dripping cannot be
stopped by tightening it further; on the contrary, the
tightening can only damage the tap.

No closing valve may be built-in between the water
heater and return safety valve, because with it the
pressure protection would be impeded!
1 Checking fitting
2 Non-return valve
3 Closing valve
Fig. 3.: Installation in a open, non-pressurized system
www.dimplex.de/en
Warm water heater
Warm water-
outlet
Warm water
heater
Warm water-
outlet
Low pressure
mixer tap
swivel spout
DHWE_50_100_gb · 06/15/A
DHWE 50S, DHWE 80S, DHWE 100S
4 5 6 7
1 2 3
Safety assembly
Cold water inlet
 The heater can be connected to the domestic water
supply network without a pressure-reducing valve if
the pressure in the network is lower than the nomi-
nal pressure. If the pressure in the network ex-
ceeds the nominal pressure, a pressure-reducing
valve must be installed.

Before connecting it to the power supply, the water
heater must be filled with water.
 When filling the heater for the first time, the tap for
the hot water on the mixing tap must be opened.
When the heater is filled with water, the water starts
to run through the outlet pipe of the mixing tap.
1 3
2
Warm water valve red
Cold water valve blue
Cold
water-
inlet
Cold
water-
inlet
EN-13