Technogel FREEZER 200/1 Instructions For The Installation, Use And Maintenance page 19

 Checking operation of the refrigerating system
The machine is fitted with gauges indicating the pressures and operating temperatures of the refrigerating
plant.
During operation it is possible to check whether the refrigerating system is operating correctly:
- High pressure gauge (condensation) R
This gauge measures the condensation; observe
the scale corresponding to the Freon inside the
machine, the temperature, when the machine is in
operation. It should be minimum + 35°C, maximum
+ 40°C.
If the temperature displayed is over +40°C (check
after 5 minutes because at the start it is normal
for the temperature to rise and then fall), this
means that the cooling water reaching the
machine is insufficient. Call the technical service
for them to check it.
- Low pressure gauge (evaporation) P
This gauge measures evaporation, i.e. the
cold produced by the machine. Observe
the Freon scale inside the machine; the
temperature should vary between –26°C
and –29°C.
IT IS EXTREMELY IMPORTANT TO SUPPLY THE PRESSURE AND TEMPERATURE FIGURES ON
GAUGES P AND R TO THE TECHNICAL SERVICE IF THEIR ASSISTANCE IS REQUIRED.
THE DATA MUST ALWAYS BE READ WITH THE MACHINE IN OPERATION
TECHNICAL WORK ON THE MACHINE MUST NOT BE CARRIED OUT BY UNAUTHORIZED
PERSONNEL AS THIS COULD PROVE DANGEROUS FOR THEIR SAFETY
CAUTION - VERY IMPORTANT NOTE
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