Midea MFA-76CRN1 Technical Manual page 138

Installation of Connective Pipe
5.2.2 Deploy the pipelines
• Drill a porthole on the wall, and put the hole sheath and hole cover through the wall.
• Place the connective pipe together with the indoor & outdoor connection wires. Use wrapping tape to tie
them tight. Do not let air penetrate into it lest condensation and drips of moist.
• Pull the connective wrapped connective pipe from outdoor through the sheath which gets through the wall,
and lead it into the room. Lay out the pipelines carefully lest damage to the pipes.
5.2.3. Make a vacuum of connective pipeline.
5.2.4. After the above steps are completed, the spool of the valve of the outdoor unit should be
completely open, and the refrigerant pipeline of the indoor unit and the outdoor unit should be smooth.
5.2.5. Use leak detector or soap water detect leak carefully to prevent leakage.
5.2.6. Put on an adiabatic envelope (accessory) at connective pipe adapter of the indoor unit, and wrap
it tight with the wrapping tape lest condensate and leakage.
•
Flare
a. Use a pipe cutter to cut off the pipe.
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R410A Tropical Split Type Technical Manual
Fig-27
Fig-28
Installation