I
. Retired
Before proceeding with this procedure, technicians should be fully familiar with the equipment
and all its features and recommend the practice of safe recovery of refrigerants. To recycle
the recovered refrigerant, analyze the refrigerant and oil samples before performing the work.
Before testing, ensure that you have the necessary power supply.
a> Familiar with the equipment and operation
b> Disconnect the power
c> Before proceeding with this procedure, ensure that:
- If necessary, mechanical operating equipment should facilitate the operation of refrigerant
storage tanks
- All personal protective equipment is effective and can be used correctly
- The entire recycling process should be conducted under the guidance of qualified personnel
Recycling equipment and storage tanks should meet the appropriate standards
d> If possible, vacuum the cooling system
e> If the vacuum state is not reached, extraction should be performed from multiple places to
extract the refrigerant in each part of the system
f> Ensure that the volume of the tank is sufficient before beginning recovery
g> Start and operate the recycling equipment according to the manufacturer's operating
instructions
h> Do not talk about tanks being overfilled. (Liquid injection volume does not exceed 80% of
the tank volume)
i> The maximum working pressure of the tank must not be exceeded even for a short period of
time
j> After the tank filling is completed and the working process is completed, ensure that the tank
and equipment are quickly removed and all shutoff valves on the equipment are closed
k > The recovered refrigerant must not be injected into another refrigeration system until it has
been purified and tested
J. Recycling
The refrigerant in the system needs to be removed during maintenance or scrap. It is
recommended that the refrigerant be completely removed.
When loading the refrigerant into the tank, use only a dedicated refrigerant tank. It is necessary
to ensure that the capacity of the tank is compatible with the amount of refrigeration injection in
the entire system. All are tanks intended to be used for refrigerant recovery and are identified
with this refrigerant (ie refrigerant recovery dedicated tanks). Tanks should be fitted with
pressure relief and shut-off valves and in good condition. If possible, empty storage tanks
should be evacuated and kept at room temperature before use.
The recovery equipment should maintain a good working condition, and the equipment
operation instructions should be provided for easy reference. The equipment should be
suitable for the recovery of flammable refrigerants. In addition, there must be qualified weighing
instruments that can be used normally. The hose should be connected using a leak-free,
releasable joint and keep it in good condition. Before using the recycling equipment, check
whether it is in a good condition, whether it is well maintained, and all the electrical components
are sealed to prevent the fire from leaking once the refrigerant leaks. If in doubt, consult the
manufacturer.
Recovered refrigerant should be contained in the used storage tank, attached with shipping
instructions and returned to the chiller manufacturer. Do not mix the refrigerant in the recovery
equipment, especially the storage tank.
If you remove the compressor or remove the compressor oil, make sure that the compressor
is evacuated to a suitable level to ensure that there is no residual flammable refrigerant in the
lubricant. Evacuation is performed before the compressor returns to the supplier. Only use
electric heating to heat the compressor housing to speed up this process. When the oil is
discharged from the system, safety should be ensured.
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