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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
Assembly
6.1 General
The following connections need to be established on the heat
pump:
Flow and return of the heating system
Condensate outflow
Control line to the heat pump manager
Voltage supply
6.2 Connection on the heating side
The heating system connections on the heat pump have a 1" ex-
ternal thread. The connection hoses are routed out of the device
in a downwards direction. A spanner must be used 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
liquefier may cause the heat pump to completely break down.
For systems in which the heating water flow can be turned off
using radiator and/or thermostat valves, an overflow valve must
be installed by the customer in a heating bypass upstream from
the heating pump. This ensures a minimum heating water flow
rate through the heat pump and helps to avoid faults.
Once the heat pump has been connected to the heating system,
it must be filled, de-aerated and pressure-tested.
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The following points must be observed when filling the system:
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 (max.
pore size 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 re-
garding the filling 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
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 either
a dual differential pressureless manifold or an overflow valve.
The procedure for adjusting an overflow valve is described in the
Chapter Start-Up. When the minimum flow rate is undershot, the
plate steel exchanger in the refrigerating 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 maximum heating water flow of 1.3 m³/h. System faults may result if this
is not observed.
Frost protection
Heat pump systems, which cannot be guaranteed to be frostfree,
should be equipped with a drainage option (see Fig.). The frost
protection function of the HPM is active whenever the HPM and
the heat circulating pump are ready for operation. The system
must be drained if the heat pump is taken out of service or in the
event of a power failure. If heat pump systems are implemented
in buildings where a power failure cannot be detected (holiday
homes etc.), the heating circuit should be operated with suitable
frost protection.
452159.66.37 · FD 9311
LAJ 11 MUR - LAJ 16 MUR
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
EN-5
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