LCA
RG66000986 – Rev.00
16
The degree of undercooling is given by the difference between the temperatures thus determined.
Warning: all LCA units are charged with R407C: any top-ups must be made by
specialised personnel using the same type of refrigerant, exclusively in the liquid phase.
Warning: the refrigerant R407C requires “POE” polyolester oil of a type approved by the
compressor manufacturer.
For no reason should a mineral oil be introduced into the oil circuit.
- The difference between the Dew Point and Bubble Point is known as “GLIDE” and this is a
characteristic property of refrigerant mixtures. If pure fluids are used, the phase change
occurs at a constant T and thus the glide is equal to zero.
STOPPING THE UNIT
To stop the unit press the "OFF" unit on the front panel.
Warning: do not stop the unit using the main switch: the latter device serves to
disconnect the unit from the electricity supply when there is no passage of current, i.e.
when the unit is already turned OFF.
Moreover, if you completely disconnect the unit from the electricity supply, the
crankcase heating elements will receive no power, thereby jeopardising the integrity of
the compressor the next time the unit is started.
Average T
(T1+T2)/2
T1 (start of condensation)
DEW POINT
T2 (end of condensation)
BUBBLE POINT
Heat content h
P
Real P
compressor
outlet
R407C
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