Beretta 20171580, Руководство по установке

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2 | Installation
14
It is forbidden to use pre-charged cooling lines.
It is forbidden to carry out welding operations with refrigerant inside
the cooling circuit. If necessary, the refrigerant must be recovered
and the circuit must be cleaned with nitrogen without oxygen.
Connections
– position the connecting pipes
Before threading the lines through the hole in the wall, close the
lines ends.
– cut the pipe end square using a pipe cutter
– remove burrs keeping the cut edge facing down
– remove the flare nut on the unit connection
– insert it into the connection pipe
– flare the tube
Pipe Ø A
mm
Inches mm
6.35
1/4 9.1
9.52
3/8 13.2
12.7
1/2 16.6
15.88
5/8 19.7
1 Key
2 Torque wrench
3 Flare nut
Pipe Ø Tightening torque
mm
Inches Nm
6.35
1/4 18
9.52
3/8 42
12.7
1/2 55
15.88
5/8 60
Pipe Ø A
mm
Inches mm
6.35
1/4 17
9.52
3/8 22
12.7
1/2 26
15.88
5/8 29
– bring line ends with flare connection close to their coupling on
the unit
– manually rotate the flare nuts by 3 - 4 turns
– tighten the connections using a spanner and a counter spanner
Use a torque wrench to tighten so as to prevent damage to flare
nuts and gas leaks.
Use equipment suitable for the system refrigerant.
During the connection, keep the leak finder on and close to the unit
so that it signals any refrigerant leak.
Avoid using the refrigerant oil on the external part of the flaring.
Avoid proximity to sources of ignition in continuous operation (open
flames, gas household appliances, electric stoves, lit cigarettes,
etc).
After connecting the cooling pipes:
– create a vacuum inside the pipes
– check for refrigerant leaks
– apply thermal insulating material on the joints