Ochsner AIR BASIC 109, Operating Manual/Installation Manual

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BA_AIR_BASIC_ELW_Multitower_OTE3_SW5x_CC_EN_V08.docx Page 23 of 92
4.1.8 Hydraulic connection versions
CAUTION!
Do not set a night setback for the system as it is
designed to run uninterrupted during cold
temperatures in winter.
PLEASE NOTE
Due to the compressor output control, the heat
pump can be operated without a buffer tank.
CAUTION!
When using individual room controllers or if the
fill water capacity is less than 100 litres, for
heating/cooling application and when connected
to
Smart Grid , a buffer tank with
30 to 50 litres/kW is required depending on the
type of operation. If this buffer is not installed, the
system must be built according to schematic 7.1.1
or 7.2.1.
CAUTION!
The closures provided are only for transport.
Replace them with suitable plugs if the DHW flow
or return is not being used!
A buffer of at least 200 l is recommended for AIR
BASIC 416 and AIR BASIC 618 systems
(e.g.: Ochsner PU200). Size and install all WNA
pipe sizes according to the nominal flow rates.
Observe the limits of use as shown in the diagram.
In systems with cooling function, ensure adequate
insulation to prevent condensation.
For operational reliability, especially in defrosting
or cooling mode, it is important that the hydraulic
safety and pressure maintaining devices are
sufficiently sized and inspected annually according
to the relevant standards.
Rule of thumb: System charge pressure for heating
and cooling mode [bar] = DEV pre-charge pressure
+ 0.5 [bar].
NOTE NOTE