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TÀI LIỆU HƯỚNG DẪN LẮP ĐẶT - MINI VRFDC Variable Frequency OutdoorUnit - Installation Manual
2.1 Arrival of goods and open-case inspection
1) When receiving the machine, check if there is any damage in transportation. If any surface or internal damage is found, please inform the
transportation agency in a written form.
2) After receiving the machine, check if the type, specification and quantity of the machine conform to the contract.
3) When unpacking the product, please keep the Manual well and check all accessories.
2.2 Refrigerant pipe
1) The refrigerant pipe must be installed by the special refrigerant distributor made by our company (purchase).
2) The refrigerant pipe must use the pipe with specified diameter and wall thickness.
3) The welding of the copper pipe must be performed with nitrogen-filled protection. Before welding, the copper pipe must be filled with the nitrogen of 20.2kgf/cm . After welding, the nitrogen must be cut off until the copper pipe is thoroughly cooled down.
4) The refrigerant pipe must be treated with thermal insulation.
5) After the refrigerant pipe is installed and before the air tightness test and vacuumization are performed, the indoor unit cannot be power-on.
2.3 Air tightness test2
After the refrigerant pipe is installed, nitrogen of 40kgf/cm (4.0MPa) must be filled from the gas side and liquid side simultaneously for 24-hour air
tightness test.
2.4 V acuumizing
After the air tightness test, vacuumization (-0.1MPa) must be performed from both the gas side and the liquid side simultaneously.
2.5 Refilling of refrigerant
1) The refilling volume of refrigerant is calculated by the diameter and length (actual length) of the pipe at the liquid sides of the indoor and outdoor
units.
2) The refilling volume of refrigerant, diameter and length (actual length) of liquid pipe, and height difference of the indoor and outdoor units shall be
recorded into the use confirmation table of the outdoor unit (on the cover plate of electronic control box) for future reference.
2.6 Electrical wiring
1) The power supply capacity and wire diameter shall be selected according to the design manual. Generally, the power line of the air conditioner is
thicker than that of the motor .
2) To prevent misoperation of the air-conditioner, don't interlace or wind the power line (220-240V -/380V 3N-) with the connecting wires (low-voltage
wires) of the indoor and outdoor units.
3) The indoor unit is power-on after air tightness test and vacuumization.
2.7 Trial Run
1) Trial run cannot be performed until the outdoor unit is power-on for more than 12 hours, or the system may be damaged.
2.1 Arrival of goods and open-case inspection
1) When receiving the machine, check if there is any damage in transportation. If any surface or internal damage is found, please inform the
transportation agency in a written form.
2) After receiving the machine, check if the type, specification and quantity of the machine conform to the contract.
3) When unpacking the product, please keep the Manual well and check all accessories.
2.2 Refrigerant pipe
1) The refrigerant pipe must be installed by the special refrigerant distributor made by our company (purchase).
2) The refrigerant pipe must use the pipe with specified diameter and wall thickness.
3) The welding of the copper pipe must be performed with nitrogen-filled protection. Before welding, the copper pipe must be filled with the nitrogen of 20.2kgf/cm . After welding, the nitrogen must be cut off until the copper pipe is thoroughly cooled down.
4) The refrigerant pipe must be treated with thermal insulation.
5) After the refrigerant pipe is installed and before the air tightness test and vacuumization are performed, the indoor unit cannot be power-on.
2.3 Air tightness test2
After the refrigerant pipe is installed, nitrogen of 40kgf/cm (4.0MPa) must be filled from the gas side and liquid side simultaneously for 24-hour air
tightness test.
2.4 V acuumizing
After the air tightness test, vacuumization (-0.1MPa) must be performed from both the gas side and the liquid side simultaneously.
2.5 Refilling of refrigerant
1) The refilling volume of refrigerant is calculated by the diameter and length (actual length) of the pipe at the liquid sides of the indoor and outdoor
units.
2) The refilling volume of refrigerant, diameter and length (actual length) of liquid pipe, and height difference of the indoor and outdoor units shall be
recorded into the use confirmation table of the outdoor unit (on the cover plate of electronic control box) for future reference.
2.6 Electrical wiring
1) The power supply capacity and wire diameter shall be selected according to the design manual. Generally, the power line of the air conditioner is
thicker than that of the motor .
2) To prevent misoperation of the air-conditioner, don't interlace or wind the power line (220-240V -/380V 3N-) with the connecting wires (low-voltage
wires) of the indoor and outdoor units.
3) The indoor unit is power-on after air tightness test and vacuumization.
2.7 Trial Run
1) Trial run cannot be performed until the outdoor unit is power-on for more than 12 hours, or the system may be damaged.
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