Premium PIA12067B Owner's Manual

outdoor unit

remove
the upper
cover

screw

wiring diagram on the 
back of the cover

1. Take the cover away.
2. Connect  the  cable  wires to the terminal board using 
    the same numbering as in the indoor unit.
3. For the electrical connections, see the wiring diagram 
    on the back of the cover.
4. Fasten the cables with a cable-clamp.
5. An efficient earth connection must be ensured.
6. Replace the covers.

Screw  the  flare  nuts  to the outdoor unit coupling with 
the same tightening procedures described for the indoor 
unit.

connection pipes

flare nuts

liquid tap

gas tap

indoor unit

protection caps

liquid valve

gas valve

service port nut

To avoid leakage, pay attention to the following points:

1. Tighten the flare nuts using two wrenches. Pay atten-
    tion not to damage the pipes.
2. If the tightening torque  is  not  sufficient, there  will 
    probably be some leakage. With excessive tightening 
    torque there will also be some leakage, as the flange 
    could be damaged.
3. The surest system consists in tightening the connecti-
    on by using a fix wrench and a torque wrench: in this 
    case use the  table on page 22.

vacuum pump

service port 

Air and humidity left  inside  the  refrigerant circuit can 
cause compressor  malfunction. After having connected  
the indoor and outdoor units, bleed the air and humidity 
from the refrigerant circuit by  using a vacuum pump. 

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