Dimplex DHWE 50S Installation And Operating Instructions Manual page 12

DHWE 50S, DHWE 80S, DHWE 100S
3 Installation
The water heater shall be installed as close as possible
to the outlets. When installing the water heater in a
room with a bathtub or shower, take into account the
requirements defined in actual Standards. It has to be
fitted to the wall using appropriate wall screws with a
minimum diameter of 8 mm. A wall with a poor load-
bearing capacity must be properly reinforced where the
heater will be installed. The water heater may only be
fixed upon the wall vertically.
To facilitate future service interventions, you are ad-
vised to install the heater in accordance with the instal-
lation measurements (see Fig. 1).
500
C
350
B
100
G 1/2"
Fig. 1: Dimension and drilling dimensions (mm)
Typ A
DHWE 50S 610
DHWE 80S 830
DHWE 100S 975

Attach template (Packing carton) at the provided
mounting position

Signs horizontal mounting holes for wall bracket,
drill and dowels. Fit screws
 Mount the wall bracket and mount hot water stor-
age heater. Tighten the screws
4 Connection to the water supply
ATTENTION!
The following instructions must be observed, otherwise
damage may occur when commissioning the hot water
storage tank. The regulations of the water supply
company and with DIN 1988 must be observed. The
size indicated on the rating plate maximum operating
pressure must not be
circumstances.
EN-12
512
100
445
B C G
400 240 260
600 260 360
750 255 510
exceeded under any
DHWE_50_100_gb · 06/15/A
ATTENTION!
The heater is equipped with an additional thermal cut-
off for protection in case of failure of the operating
thermostat. In this case, however, the temperature of
the water in the heater can reach up to 130 °C
according to the safety standards. During the water
supply installation, the possibility of temperature
overloads should be taken into account.
ATTENTION!
To enable the customer service case a smooth
transition of the water heater, all pipes should be fitted
with detachable connections.
4.1 Installation in a closed, pressurized system
In a closed, pressurized system (Fig. 2) pressurised
mix taps should be used at the outlet points.

To ensure safe operation of the heater a safety
valve should be installed on the inlet pipe to pre-
vent elevation of pressure for more than 0.1 MPa (1
bar) above the nominal pressure.

The outlet opening on the safety valve must be
equipped with an outlet for atmospheric pressure.
The heating of water in the heater causes the pres-
sure in the tank to increase to the level set by the
safety valve.

As the water cannot return to the water supply sys-
tem, this can result in dripping from the outlet of the
safety valve.

The drip can be piped to the drain by installing a
catching unit just below the safety valve.
 The drain installed below the safety valve outlet
must be piped down vertically and placed in an en-
vironment that is free from the onset of freezing
conditions.

To avoid water dripping from the safety valve, an
expansion tank should be installed on the inlet pipe
of the heater with the capacity of at least 5 % of the
heater volume.

To ensure proper operation of the safety valve, pe-
riodical inspections must be carried out to remove
limescale and make sure the safety valve is not
blocked.

To check the valve, open the outlet of the safety
valve by turning the handle or unscrewing the nut of
the valve (depending on the type of the valve). The
valve is operating properly if the water comes out of
the nozzle when the outlet is open.

Before connecting it to the power supply, the water
heater must be filled with water!
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