Wrapping of Tubing
The insulating material shall be closed-pore PE or foaming rubber plastic, with over 85℃ of flame and temperature resistance and over 8mm of thickness.
Wrap the tubing and connecting wire into a bundle with PVC protection tape to separate the tubing and connecting wire from drainage pipe.
Wrap from the lower part of outdoor unit to the position where the duct bundle passes through the wall.
Paste and fix the PVC protection tape with plastic tape to prevent against looseness.
Use items including tube clip to fix the tube bundle wrapped to the wall.
Seal the external side of wall-through hole with sealant, putty, paint, etc.
Do not too tightly wrap the protection tape to avoid generating impact on insulating effect.
Do not pinch the copper tube during bending.
Generally, a part of drainage hose about 20mm from the orifice is not bound together with the tubing and indoor, outdoor connecting wires, instead, the said part shall be separated and free to facilitate outdoor water dripping.
Vacuuming and Refrigerant Filling
The outdoor unit has been filled with refrigerant in the factory and needs not to be vacuumed and filled with refrigerant; when the pipe for refrigerant is connected, before the refrigerant is released from the outdoor unit, the indoor unit and connecting pipe shall be vacuumed as follows:
Unscrew the nut from the service connection of suction line valve and connect the compound pressure gauge.
Connect the vacuum pump to the compound pressure gauge; open the compound pressure gauge and vacuum pump to vacuum the indoor unit and connecting pipe.