Haier 1U22KAEFRA Installation Manual Download Page 14

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(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, not even 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 contact your local dealer or qualified personnel.

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.

Scrapping

Before scrapping, the technician shall be completely familiar with the equipment and all its features. The safe

recovery of refrigerant is recommended. In case the refrigerant recovered needs to be reused, before which the
sample of refrigerant and oil shall be analyzed. The power supply required shall be guaranteed before tests.

(1)

The equipment and operation shall be well known;

(2)

Power supply shall be switched off;

(3)

The followings shall be guaranteed before scrapping:

•

The mechanical equipment shall be convenient for operation on the cylinder of refrigerant (if necessary);

•

All personal protective equipment is available and being used correctly;

•

The whole course of recovery shall be guided by qualified personnel;