INVENTOR DR2VI32-09WFI Benutzer- & Installationshandbuch Seite 14

●The whole course of recovery shall be guided by qualified personnel;
●The recovery equipment and cylinders shall be in line with corresponding standards.
(4) The refrigeration system shall be vacuumized if possible;
(5) In case the vacuum state cannot be reached, vacuumizing shall be carried out from numerous positions, to pump the
refrigerant in each part of the system out;
(6) It shall be guaranteed that the capacity of cylinders is sufficient before recovery;
(7) The recovery equipment shall be started and operated as per the operation instructions of the manufacturer;
(8) The cylinder cannot be charged too full. (The refrigerant charged cannot exceed 80% of the capacity of cylinders)
(9) The maximum operating pressure of cylinders cannot be surpassed even only lasting for a short term;
(10) After refrigerant charging is completed, the cylinder and equipment must be evacuated rapidly, and all the stop valves
on the equipment must be closed;
(11) Before purification and tests, the refrigerant recovered cannot be charged into another refrigeration system.
Note:
The air conditioner shall be marked (with dates and signature) after being scrapped and the refrigerant is
discharged. It shall be guaranteed that the sign on the air conditioner can reflect the flammable refrigerant
charged inside.
Recovery
During maintenance or scrapping, the refrigerant inside the refrigeration system needs to be cleared. It is
recommended that the refrigerant be cleared thoroughly.
The refrigerant can only be charged into a dedicated cylinder, the capacity of which shall match with the refrigerant
amount charged in the whole refrigeration system. All cylinders to be used are designated for the recovered refrigerant
and labeled for that refrigerant (Dedicated Cylinder for Refrigerant Recovery). The cylinders shall be equipped with
pressure relief valves and stop valves under favorable state. The empty cylinder shall be vacuumized before usage and
be kept under normal temperature if possible.
The recovery equipment shall always be under favorable working state, and be equipped with operation instructions,
to facilitate information search. The recovery equipment shall be applicable to the recovery of flammable refrigerant.
Moreover, weighing apparatus under available state with measurement certificates shall be equipped. In addition,
removable attachment joints free from leakage shall be used as the hose, and shall always be under favorable state.
Whether the recovery equipment is under favorable state and is properly maintained and whether all the electrical
components are sealed shall be checked before usage, to avoid fire in case of refrigerant leakage. If you have any
question, please consult the manufacturer.
The refrigerant recovered shall be delivered back to the manufacturer in appropriate cylinders, with transporting
instructions being attached. Mixing of refrigerant in recovery equipment (especially the cylinders) is not allowed.
During transporting, the space in which the flammable refrigerant air conditioners are loaded cannot be sealed. Anti-
static measures shall be taken for the transporting vehicles if necessary. Meanwhile, during the transporting, loading and
unloading of air conditioners, necessary protective measures shall be taken, to protect the air conditioner from being
damaged.
During removal of the compressor or clearing of the compressor oil, it shall be guaranteed that the compressor
is vacuumized to a proper level, to ensure no residual flammable refrigerant is left inside the lubricating oil. The
vacuumizing shall be completed before the compressor is delivered back to the manufacturer. The vacuumizing can only
be accelerated by heating the compressor housing through electrical heating. Safety shall be guaranteed when the oil is
discharged from the system.
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