3B SCIENTIFIC PHYSICS 1000820 Manual Del Usuario página 15

10. Mollier diagram
Mollier diagrams for a refrigerant are often use to
demonstrate the operating cycle for a compres-
sion heat pump. They plot the pressure p against
the specific enthalpy h for the refrigerant (en-
thalpy is a measure of heat content in the refrig-
erant and always increases with increasing pres-
sure and gas content).
In addition the isotherms (T = const.) and isen-
tropes (S = const) are given as well as the relative
mass content of the liquid phase. Left of the so-
called boiling line, the refrigerant is fully liquefied.
To the right of the so-called saturated vapour line,
the refrigerant will exist as overheated vapour.
Between the lines the refrigerant will be in a mix-
ture of liquid and gas states. Both lines intersect
at the critical point.
See Fig.7 on page 8.
11. Changing the battery

Remove the cover at the rear of the thermom-
eter and take out the flat batteries.

Insert new batteries, making sure that their
polarity is correct.

Close the cover again afterwards.

During prolonged periods of disuse, remove
the batteries.

Do not dispose of the batteries in the regular
household garbage. Follow the applicable le-
gal regulations (UK: Waste Batteries and Ac-
cumulators Regulations, EU: 2006/66/EC).
12. Storage, care and maintenance
The heat pump is maintenance-free.

Keep the heat pump in a clean, dry and dust-
free place.

Before cleaning the equipment, disconnect it
from its power supply.

Use a soft, damp cloth to clean it.
13. Disposal

For any necessary repairs, returns etc., the
heat pump needs to be packaged in its origi-
nal box standing upright on its one-way pallet.
For this reason you should not dispose of the
original box or pallet.

Should you need to dis-
pose of the heat pump
itself, never throw it
away in normal domes-
tic waste. Local regula-
tions for the disposal of
electrical equipment
will apply.

Do not dispose of the batteries in the regular
household garbage. Follow the applicable le-
gal regulations (UK: Waste Batteries and Ac-
cumulators Regulations, EU: 2006/66/EC).
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