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fig. 8
Before After Copper tubing
Reamer
A
Flare nut
Copper tubing
Flare tool
B
7 - INSTALLATION AND START UP
Union FLAREnut
Spanner
Torque wrench
Indoor unit
D
ø Tube Tightening torque Tube thickness
ø 9,52 (3/8”) 20 - 25 N*m 0,8 mm
ø 15,88 (5/8)” 54 - 75 N*m 0,8 mm
Apply refrigerant lubricant.
C
7.8.1 Tightening
Apply the following tightening pairs, depending on the diameter of the pipe. If the flare connection is tightened
with excessive torque it can be damaged and there may be uncontrolled leaks of refrigerant.
It is advisable to use a chive with an arm length of 200mm.
Be sure to use the rings supplied with the machines, or alternatively fitting suitable for refrigerant fluid R410A: the
operating pressure of this fluid is at least 1.6 times the pressure of a conventional fluid.
pag. 21
21


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