65
V 09/22
• Check whether there is a fire source or potential fire source in the maintenance area. Running fire is prohibited
in the maintenance area and the “no smoking” sign should be hanged.
• Check whether the warning sign is in good condition, otherwise replace it.
Welding
• If it is necessary to cut or weld the refrigerant system pipes in the maintenance procedures, please follow the
steps here below:
a. Shut down the unit and cut power supply
b. Eliminate the refrigerant
c. Vacuum with a vacuum machine
d. Clean the pipes with the N2 gas
e. Cut and weld or
f. Bring the unit to a service centre for welding
• The refrigerant should be recycled in a specialized storage tank.
• Make sure there aren’t any free flames near the outlet of the vacuum pump and that it’s well-ventilated.
Filling the refrigerator circuit
• Use refrigerant filling appliances specialized for R32. Make sure that different kinds of refrigerant don’t
contaminate one another.
• The refrigerant tank should be kept upright when filling with the refrigerant.
• Stick the label on the system after filling is finished.
• Don’t overfill.
• After filling is finished, please test the unit for leakage detection before the operation test; another test for leakage
detection should be carried out when the refrigerant is removed.
Safety instructions for transportation and storage
• Please use a flammable gas detector to check before unloading and opening the container.
• No fire source and no-smoking.
• According to the local rules and laws
Before installating, please contact with local authorized maintenance center, if unit is not installed by the authorized
maintenance center, the malfunction may not solved due to discommodious contact.
• The air conditioner must be installed by professionals according to the national wiring rules and this manual.
• Refrigerant leak test must be made after installation.
• To move and install air conditioner to another place, please contact our local special service center.
SAFETY PRINCIPLES FOR INSTALLATION
• Fire prevention device shall be prepared before installation.
• Keep installing site ventilated (open the door and window)
• Ignition source, fire, smoking and mobile phones are not allowed to exist in area where R32 refrigerant located.
• Keep leak detector in working state during the installation.
• If R32 refrigerant leakage occurs during the installation, you shall immediately detect the concentration in indoor
environment until it reaches a safe level. If refrigerant leakage affects the performance of the air conditioner, please
immediately stop the operation, and the air conditioner must be vacuumed firstly and be returned to the maintenance
station for processing.
• Keep electric appliance, power switch, plug, socket, high temperature heat source and high static away from the area
underneath sidelines of the indoor unit.
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