Return Inhibitor; Pressure Reducer; Drainage; Filter - Dimplex WWSP 885S Instructions De Montage Et D'utilisation

5.4 Return inhibitor

Domestic hot water cylinders with a nominal capacity greater
than 10 litres are to be equipped with a return inhibitor in the cold
water supply line (independent of the heating type).

5.5 Pressure reducer

According to DIN 4753 Part 1, a pressure reducer is to be in-
stalled in the cold water supply line to the domestic hot water cyl-
inder if the pressure in the cold water supply line is above the op-
erating pressure of the system. The permitted operating pressure
of the water cylinder is 10 bar.

5.6 Drainage

Domestic hot water cylinders with a nominal capacity greater
than 15 litres must be able to be completely drained without re-
quiring disassembly.

5.7 Filter

A filter (with DIN-DVGW test symbol) is to be installed before the
drinking water system is filled for the first time and directly after
the water meter.

5.8 Flange heater

Fig. 5.1: Suitable boiler flanges: for all types Ø 180, TK 150
(8 screws)
The flange heater should only be connected by authorised elec-
tricians according to the corresponding circuit diagram. All rele-
vant requirements of the utility company and VDE regulations
must be observed.
6

Sensor positioning

A sensor terminal block is mounted directly on the vessel wall for
individual sensor positioning (regulation of the system).
NOTE
Recommended sensor position for domestic hot water preparation: 1.2 m
measured from the bottom of the vessel.
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7

Commissioning

ATTENTION!
All connecting sleeves which are not required should be sealed with vent
plugs.
ATTENTION!
All screws are to be examined and retightened prior to commissioning.
ATTENTION!
The installation and commissioning procedures should only be
conducted by a recognised and professional installation company.

7.1 Preparation

 The bare-tube heat exchangers need to be flushed with
water prior to connecting the heating water pipeline.
 Check to make sure that all of the connections on the cylin-
der are firmly tightened, sealed or soldered.
All screws are to be examined and retightened prior to com-

missioning.

7.2 Filling

 The cylinder is connected to the water pipeline via a filling
hose.
 Flush the cylinder and pipelines and then discharge the flush
water.
 Fill the cylinder until air-free water flows from all hot water
taps. (This process may take 15 - 30 minutes depending on
the size of the cylinder and the water flow rate).
 Turn off the tap.
 Continue filling the cylinder until the operating pressure is
reached.

7.3 Leak test

Each point of water-fed heating systems must be tested at a
pressure of 1.3 times the total pressure (this must be at least 1
bar overpressure). The system should be heated to its maximum
operating temperature as soon as possible after the cold water
pressure test to check whether it remains leak-tight. A drop in
pressure points to a leak in the system.
7.3
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