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5
Installation
5.1 General Information
The device should always be installed on a permanently smooth,
even and level surface. The entire frame should lie directly on the
ground to ensure a good soundproof seal and to prevent the
water-bearing components from becoming too cold. If this is not
the case, additional insulation measures may be necessary. It
must be possible to carry out maintenance work without being
hindered. This can be ensured by maintaining a clearance of
1.2 m to any fixed walls.
ATTENTION!
Do not restrict or block up the air intake opening or exhaust air outlet.
5.2 Condensed Water Pipe
Condensed water that forms during operation must be drained
off frost-free. To ensure proper drainage, the heat pump must be
mounted horizontally. The condensed water pipe must have a
minimum diameter of 50 mm and should be fed frost-free into a
sewer. Do not discharge the condensate directly 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.
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6
Mounting
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
6.2 Heating System Connection
The heating system connections on the heat pump have a
1" external thread. Route the connection hoses out of the device
in a downwards direction. Use a spanner to firmly grip the transi-
tions 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. 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 alkaline earths
Total heat
in mol/m³ and/or
output in [kW]
mmol/l
≤
up to 200
≤
200 to 600
> 600
< 0.02
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 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
drastically, the plate steel exchanger in the refrigerating cycle
can freeze, which can lead to total loss of the heat pump.
6.2
Total
hardness in dH
≤
2.0
11.2
≤
1.5
8.4
< 0.11
EN-5
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