Installation; General Information; Air Connection; Heating System Connection - Dimplex Lih 10Te Montage- Und Gebrauchsanweisung

LIH 10TE
7

Installation

7.1 General Information

The following connections need to be established on the heat
pump:
- Fresh and exhaust air
- Flow and return flow of the heating system
- Condensate outflow
- Voltage supply
- Temperature sensor

7.2 Air Connection

ATTENTION!
Do not restrict or block the area around the air intake or outlet.
The air connection is achieved via insulated air ducts. From a
noise insulation point of view, air ducts (e.g. from EPP or glass
fibre lightweight concrete) are particularly suitable, which only
touch the duct connection area via a sealing ring the same size
as the insulated duct connection area. The existing internal
threads (M8) 6x per intake and outlet cover also enable the use
of an air duct with flange. When flanged air ducts are used on
the intake and outlet side, it is important to ensure that suitable
insulation material is placed between the air duct flange and the
sheet panel. These air ducts are fixed in place with hexagonal
screws M8 on the intended threaded holes. When doing this,
ensure that the air duct stubs only touch the insulation. There
should be no contact with the external sheeting.
The air ducts lead to a wall opening, the inner sides of which
must be fitted with cold insulation to prevent the walling from
cooling out or suffering from moisture penetration.
The air circuit in this heat pump can be set variably. The differ-
ent options are shown in the attachment ( Cap. 1.2 on pag. III).
NOTE
The air ducts must be supplied by the customer!
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7.3 Heating System Connection

The heating system connections on the heat pump have a R 1"
external thread. Use a spanner to firmly grip the transitions
when 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.
For systems in which the heating water flow can be shut off via
the radiator or thermostat valves, an overflow valve must be in-
stalled in a heating bypass behind the heat pump by the cus-
tomer. This ensures a minimum heating water flow rate through
the heat pump and helps to avoid faults.
Once the heating system has been installed, it must be filled,
de-aerated and pressure-tested.
Consideration must be given to the following when filling the
system:
 Untreated filling water and make-up water must be of
drinking water quality (colourless, clear, free from sedi-
ments)
 Filling water and make-up water must be pre-filtered (pore
size max. 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.
452165.66.01 · FD 9912
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
English
20 < 50 50
11.2
8.4
1
< 0.11
1
< 0.11
EN-7