Panasonic Urban Multi MX1 Series Manual page 14

Installation 1
3.2.3 Refrigerant Pipe Work
The 3 Principles of The "3 principles of refrigerant piping" must be strictly observed
Refrigerant Piping
Make sure there is no moisture
inside the pipes
14
Operational steps
Install indoor unit Cut pipes to size
Solder
Cause of problem
Rainwater, work water,
etc. gets into pipes from
outside
Moisture generated inside
pipes due to condensation
Formation of oxides inside
pipes during soldering
Dirt, dust or other
extraneous material gets
into pipes from outside
Leak from soldered area
Leak from flared area
Leak from flange area
Dry
Fit pipes
provisionally
Flushing Air tight test
Actoin to avoid problem
Pipe covering
Replace nitrogen
Pipe covering
Use the proper materials (copper pipe,
solder, etc.)
Adhere strictly to standard soldering
work practice
Adhere strictly to standard flaring work
practice
Adhere strictly to standard flange
connection work parctice
The 3 princples of refrigerant piping
Clean
Make sure there is no dirt inside the
pipe
PACD011001G2 / PACD011004G3
Replace nitrogen
Vacuum drying
Flushing Vacuum drying
Flushing
Air tight test
Air tight
Make sure the refrigerant does not
leak out
Urban Multi Inverter "MX1" Series
(V0963)
(V0964)