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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.
10.2. SELECTION OF THE REFRIGERANT CONNECTION LINES
10.3. TIGHTENING TORQUE FOR FLARED CONNECTIONS
Pipe diameter Pipe thickness Tightening torque
(inch) (mm) (Nm)
1/4” ≥0.8 15 - 20
3/8” ≥0.8 30 - 40
1/2” ≥0.8 45 - 55
5/8” ≥0.8 60 - 65
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
Indoor units SC1200V
Outdoor units SC1200
Refrigeration pipework
Maximum refrigerant tube length m 25
Maximum (indoor/outdoor) cooling line level
difference
m 10
Refrigerant to be added g/m 50
Compressor
Refrigerant charge kg 3,5
Refrigeration pipework
Diameter of liquid refrigerant connections mm (inch) 9,52 (3/8”)
Diameter of refrigerant gas connections mm (inch) 16 (5/8”)
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