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10.
COOLING CONNECTIONS
10.1.
REFRIGERANT PIPES
•
Refrigerant R410A
•
Use copper pipes for gas and liquid, as in-
dicated in the relative table (see the con-
nection pipes table).
•
Before assembling the insulated copper
pipes on the refrigerant lines, seal both
ends of each pipe to protect the inside
from dust and humidity. The inside of the
pipes must be perfectly clean and free of
any foreign bodies.
•
Try to avoid bending the pipes. If you must
bend them, the bend radius should be
greater than 100mm.
WARNING:
•
The above table shows the quan-
tity of refrigerant gas to add, ac-
cording to the models, for each
additional metre of piping.
•
The pipe wall must be at least
0.8mm thick, and the pipe must be
able to withstand a pressure of 6.0
MPa.
•
The longer the connection pipe,
the lower the level of efficiency
14
10.2.
SELECTION OF THE REFRIGERANT CONNECTION LINES
Indoor units
Outdoor units
Refrigeration pipework
Maximum refrigerant tube length
Maximum (indoor/outdoor) cooling line level
difference
Refrigerant to be added
Compressor
Refrigerant charge
Refrigeration pipework
Diameter of liquid refrigerant connections
Diameter of refrigerant gas connections
10.3.
TIGHTENING TORQUE FOR FLARED CONNECTIONS
Pipe diameter
(inch)
1/4"
3/8"
1/2"
5/8"
m
m
g/m
kg
mm (inch)
mm (inch)
Pipe thickness
Tightening torque
(mm)
≥0.8
≥0.8
≥0.8
≥0.8
SC1200V
SC1200
25
10
50
3,5
9,52 (3/8")
16 (5/8")
(Nm)
15 - 20
30 - 40
45 - 55
60 - 65
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