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NOTICE
mentioned in the table above.
as mentioned in the table 7.3
taken into account.
complete installation.
1.
indicated
length and height difference".
"6.2. Selection of piping material".
history of the unit to be replaced.
cooling mode.
• Check the contamination inside the existing piping.
If you cannot meet all these requirements, the existing
pipes must be cleaned or replaced after removing the
air conditioning units to be replaced.
See paragraph 6.2
Cautions on handling the stem cap
Take care not to damage it.
After handling the stop valve, make sure tighten the
stem cap securely. For the tightening torque, refer to
Check for refrigerant leaks after tightening the stem
cap.
on page 13, must be
32
Cautions on handling the service port
depressor pin, since the service port is a Schrader
type valve.
After handling the service port, make sure to tighten
the service port cap securely. For the tightening
Check for refrigerant leaks after tightening the service
port cap.
7.
Refrigerant piping
7.1.
Piping diagram for single split
Flare connection
Indoor
Unit
Liquid pipe
Model
vertical height difference for single split
Model
less than 50 m
length
Vertical height
difference
less than 30 m
15
3-way stop valve for
1U71 and 1U100
Ball valve for others
Outdoor
unit
Diameter of
connecting
Pipe
pipe
method
Liquid
pipe
connection
pipe
Liquid
pipe
connection
pipe
nuts to the pipes to be
pipes.
less than 75 m
less than 30 m
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