Dimplex WI 180TU Instructions D'installation page 26

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6 Installation
6.1 General Information
The water-to-water heat pump must be installed in a frost-free,
dry room on an even, smooth and horizontal surface. The entire
base of the frame should lie directly on the floor to ensure an
adequate soundproof seal. If this is not the case, additional
sound insulation measures may be necessary.
The heat pump must be installed so that maintenance work can
be carried out without hindrance. This can be ensured by main-
taining a clearance of approx. 1 m in front of the heat pump.
0,5 m
1,0 m
Neither frost nor temperatures higher than 35? must occur in
the installation location at any time of the year.
6.2 Acoustic Emissions
The heat pump operates silently due to efficient sound insula-
tion. Internal insulation measures should be carried out to pre-
vent vibrations from being transmitted to the foundation or to
the heating system.
7 Installation
7.1 General
The following connections need to be established on the heat
pump. The hydraulic integration diagram must be adhered to:
 Flow and return of the well system
Flow and return of the heating system

 Temperature sensor
Voltage supply

EN-6
7.2 Connection on the heating side
ATTENTION!
Flush the heating system prior to connecting the heat pump.
Before connecting the heating water system to the heat pump,
the heating system must be flushed to remove any impurities,
residue from sealants, etc. Any accumulation of deposits in the
liquifier could cause the heat pump to completely break down.
Once the heat pump has been connected to the heating sys-
tem, it must be filled, de-aerated and pressure-tested.
ATTENTION!
The maximum test pressure in the heating circuit and the
primary circuit is 6.0 bar.
This value must not be exceeded.
The following points must be observed when filling the system:
Untreated filling water and make-up water must be of

drinking water quality.
(colourless, clear, free of sediments)
Filling water and make-up water must be pre-filtered (max.

pore size 5 µm).
Scale formation in domestic hot water heating systems cannot
be avoided, but in systems with flow temperatures below 60 °C,
the problem can be disregarded. With high-temperature heat
pumps and in particular with bivalent systems in the higher per-
formance range (heat pump + boiler combination), flow tem-
peratures of 60 °C and more can be achieved. The following
standard values should therefore be adhered to with regard to
the filling and make-up water according to VDI 2035, sheet 1:
The total hardness values can be found in the table.
Total heat
output in kW
< 50
50 - 200
200 - 600
> 600
1. This value lies outside the permissible value for heat exchangers in heat
pumps.
Fig. 7.1:Guideline values for filling and make-up water in accordance with
VDI 2035
For systems with an above-average specific system volume of
50 l/kW, VDI 2035 recommends using fully demineralized
water and a pH stabiliser to minimize the risk of corrosion in the
heat pump and the heating system.
ATTENTION!
With fully demineralized water, it is important to ensure that
the minimum permissible pH value of 7.5 (minimum
permissible value for copper) is complied with. Failure to
comply with this value can result in the heat pump being
destroyed.
452237.66.53 · FD 9912
WI 120TU - WI 180TU
Specific system volume
Total alkaline earths
(VDI 2035) in l/kW
in mol/m³ and/or
< 20
mmol/l
Total hardness in °dH
2.0 16.8
2.0  11.2
1.5 8.4
1
< 0.02
< 0.11
20 < 50 50
11.2
8.4
1
< 0.11
1
< 0.11
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