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21. Make sure the refrigerating system is earthed before proceeding with reloading
of the system with refrigerant.
Label the system when reloading is complete.
Pay particular attention not to overload the refrigerating system.
22. Before proceeding with reloading, the system must undergo the pressure
test with OFN and the tightness test at the end of reloading, but before
commissioning.
It is necessary to carry out an additional tightness test before leaving the site.
22a. Remove the refrigerant safely. Move the refrigerant in the cylinders suitable
for recovery. Make sure there is a correct number of cylinders to contain the
charge entirely. All cylinders are labelled for this type of refrigerant (special
cylinders for refrigerant recovery).
The cylinders must be complete of a pressure relief valve and of and of the
corresponding closure valve in good conditions. Empty cylinders are evacuated
and, if possible, cooled down before recovery.
22b.Equipment for recovery must be within the range of the technician, in good
conditions, with a series of instructions and must be suitable for recovery of all
the refrigerants (even flammabl ones). A series of calibrates scales must be
available and in good conditions. Check that the pipes are in good conditions
and complete of disconnection joints without losses.
22c.Before using the machine for recovery, check that it is in good operating
conditions, that it has been adequately maintained and that all the associated
electric components are sealed to prevent switching-in in case of release of
refrigerant. In case of doubt, please contact the manufacturer.
23. Collected refrigerant must be returned to the flui supplier in the appropriate
collection cylinder, compiling the corresponding Transfer Note of Scraps.
DO NOT mix the refrigerants in the collection units and, in particular, in the
cylinders.
24. If the compressors or their oils must be removed, make sure they have been
emptied at an acceptable level to be sure that the flammabl refrigerant does
not remain in the lubricant.
This process must be carried out before the compressor returns to the suppliers.
Only use electric heating on the compressor body to speed up this process.
25. Make sure that contamination between different refrigerants does not occur
when a reloading equipment is used.
The flexibl pipes or ducts must be as short as possible to reduce the quantity
of refrigerant inside them to a minimum.
26. The appliance must be installed, operated and placed in a room with a surface
higher than the one indicated in table 1.
27. Do not drill nor burn the unit.
28. The replaced electric components MUST be suitable and correspond to the
appliance specifications Every maintenance operation MUST be carried out as
described in this manual. Contact the manufacturer in case of doubt.
29. Apply the following checks:
• The size of the room inside which are located the parts containing the
refrigerant, are in accordance with the current quantity of charge of the
refrigerant (see par. 0.5);
• The ventilation device works correctly and the outlets are not clogged;
• The markings on the machine must always be visible and readable, correct
them if not;
• The pipelines ore the components containing refrigerant MUST be installed
in a place where no substance may corrode them, unless the components are
built with materials intrinsically resistant against corrosion or are suitably
protected against this risk.
EN - 7
SHERPA AQUADUE TOWER
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