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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 insu-
lation 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, en-
sure 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 different
options are shown in the attachment ( Cap. 1.2 on pag. III).
NOTE
The air ducts must be supplied by the customer!
EN-6
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 sys-
tem:
Untreated filling water and make-up water must be of drink-
ing water quality (colourless, clear, free from sediments)
Filling water and make-up water must be pre-filtered (pore
size max. 5 µm).
Scale formation in hot water heating systems cannot be com-
pletely avoided, but in systems with flow temperatures below
60 °C the problem can be disregarded.
With medium and high-temperature heat pumps, temperatures
above 60 °C can be reached.
The following standard values should therefore be adhered to
concerning the filling water and make-up water (according to VDI
2035 Sheet 1):
Total heat
output in [kW]
up to 200
200 to 600
> 600
Minimum heating water flow rate
The minimum heating water flow rate through the heat pump
must be assured in all operating states of the heating system.
This can be accomplished, for example, by installing either a dual
differential pressureless manifold or an overflow valve. The pro-
cedure for setting an overflow valve is described in the chapter
"Start-up". When the minimum heating water flow rate is under-
shot, the plate heat exchanger in the refrigeration circuit can
freeze, which can lead to total loss of the heat pump.
The nominal flow rate is specified depending on the max. flow
temperature in the device information and must be taken into ac-
count during planning. With design temperatures below 30 C in
the flow, the design must be based on the max. volume flow with
5 K spread for A7/W35.
The specified nominal flow rate (See "Device information" on
page 14) must be guaranteed in every operating status. An in-
stalled flow rate switch is used only for switching off the heat
pump in the event of an unusual and abrupt drop in the heating
water flow rate and not to monitor and safeguard the nominal
flow rate.
NOTE
The use of an overflow valve is only recommended for panel heating and
a max. heating water flow of 1.3 m³/h. System faults may result if this is
not observed.
452165.66.01 · FD 9502
Total alkaline earths
Total
in mol/m³ and/or
hardness in °dH
mmol/l
2.0
11.2
1.5
8.4
< 0.02
< 0.11
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