2 | INSTALLATION
16
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
Pipe insulation
Connection pipes must be thermally insulated to prevent dispersions of
heat or formation of condensate.
1
Gas pipe
2
Condensation discharge
3
Liquid pipe
4
Heat insulation
5
Adhesive tape
- insulate the liquid and gas pipes separately
- use insulating material that is thicker than 15 mm
- ensure that the insulating material adheres to the pipe without
gaps
- fix using adhesive tape
Do not tighten the adhesive tape too much, so as to avoid damaging
the insulation.
Avoid partial insulation of the pipes.
In case of use with outdoor temperature above 30 °C and relative
humidity above 80%, increase wall thickness up to 20 mm.
For gas pipes:
- ensure that the material used resists to temperatures up to 120°C
For liquid pipes:
- ensure that the material used resists to temperatures up to 70°C
Stop valves
Cooling connections feature shut-off valves.
During operations on the cooling circuit, start-up and service, it may be
required to open and close the valves.
A
Opening
B
Closing
1
Service connection blanking plug
2
On-off valve shaft
3
Refrigerating pipe attachment
4
On-off valve cover plug
5
Hex wrench
