45
We reserve the right to make changes without any prior notice.
Translation from original instructions
6.4 Checks during operation
After a few minutes from the compressor start-up, check that:
-
the condensation temperature is approximately 15 ° C higher than the outside air temperature (for units equipped with
remote condenser) or 5°C higher than the temperature of the output water from the plate integrated condensers, but in
any case not below 35°C of saturation temperature corresponding to the condensation pressure;
-
the operating variables (temperature, pressure) measured by the probes on the machine and displayed by the micro
-
processor control switch must correspond to real values;
After a few hours from starting the compressors, when the air temperature is approaching the set point values set, check
that:
that the electrical absorption of the unit is close to the data shown in the wiring diagram. Considerably different values may
be due to the reduced capacity operation of the unit, at working conditions very different from nominal ones, or to the mal-
functioning of one or more components.
-
the liquid sight glass must be green;
-
that no bubbles appear on the sight glass placed in the liquid pipe. The continuous presence of bubbles may indicate a
lack of refrigerant charge; the occasional or sporadic presence of bubbles is allowed;
-
the superheating of the refrigerant fluid in inlet must be approximately between 5-7 ° C;
-
the sub cooling of the refrigerant in the liquid line, when leaving the condenser, should be in the range of 2-5 ° C. Too
high a sub cooling value may indicate that the refrigerant charge is too high or that there are non-condensable elements
in the cooling circuit;
-
that the coolant filter is not blocked or clogged. To this end, it is sufficient to detect the temperature of the liquid pipe
immediately before and immediately after the filter, checking that there are no significant differences (up to a couple of
degrees ° C are allowed).
