Zanotti Zer0 120, Руководство по ремонту

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Figure 14 - Sight Glass Inspection
NOTE: If no bubbles are present in the sight glass,
there is sufficient refrigerant in the unit for that load at
that particular box temperature. This test does not
determine if the unit contains a full charge of
refrigerant.
4.9 CHECKING AND REPLACING FILTER-DRIER
NOTE : It is important to replace the filter drier
whenever the system is opened for an extended
period of time or experience low side refrigerant leak.
4.9.1 Checking Filter-Drier
Check for any obstruction of the filter-drier by feeling
the inlet and outlet connections of the liquid line on
the filter cartridge. If the temperature of the outlet
connection seems lower than the temperature of the
inlet connection, replace the filter-drier. There is a
metering effect because there is excess moisture or
other contaminants trapped.
4.9.2 Replacing the Filter-Drier
Remove refrigerant charge or perform a low side pump
down (Section 4.3 & 4.7) Remove the drier mounting clip,
then replace the filter-drier. Following drier replacement,
evacuate and recharge unit (refer to sections 4.4, 4.5, &
4.6).
Figure 15 - Filter / Drier