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LA 17PS - LA 26PS
5.2 Condensate pipe
Condensate that forms during operation must be drained off
frost-free. To ensure proper drainage, the heat pump must be
mounted horizontally. The condensate pipe must have a mini-
mum diameter of 50 mm and must be fed into a sewer in such a
way that it is safe from frost. Do not discharge the condensate di-
rectly into clearing tanks or cesspits, as aggressive vapours or a
condensed water pipe which has not been laid in a frost-free
manner could destroy the evaporator.
ATTENTION!
The frost line can vary according to the climatic region. The regulations
of the countries in question must be observed.
6
Installation
6.1 General Information
The following connections need to be established on the heat
pump:
Flow and return flow of the heating system
Condensate outflow
Control line to the heat pump manager
Power supply
EN-6
6.2 Heating System Connection
The heating system connections on the heat pump have a 1 1/4"
external thread.
Route the connection hoses out of the device in a downwards di-
rection. Use a spanner to firmly grip the transitions when con-
necting the heat pump. After the heat pump has been installed,
the ductwork must be sealed so that the connection is gastight.
Before connecting the heating water system to the heat pump,
the heating system must be flushed to remove any impurities,
residue from sealants, etc., and to prevent any accumulation of
deposits in the liquifier. A contaminated liquifier may 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 installed in a heating bypass
downstream from the heat pump by the customer. 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 (in the heat pump the air-relief cock
is located at or in the water pipes at the condenser).
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. 5µm).
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 sys-
tem. This can be accomplished, for example, by installing a dual
differential pressureless manifold. When the minimum flow rate
is undershot drastically, the plate steel exchanger in the refriger-
ating cycle can freeze, which can lead to total loss of the heat
pump.
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.
452159.66.04 · FD 9202
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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