2 | INSTALLATION
15
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
If required:
- remove the valve covering plug
- operate on the valve shaft with an hex wrench
- open or close according to what is needed
- immediately stop as soon as the valve shaft has reached the stop
point
- use a torque wrench calibrated on the valve diameter
Pipe Ø
Hex
wrench
Valve
tightening
torque
Plug
tightening
torque
mm
inches
mm
Nm
Nm
6.35
1/4
5
6
25
9.52
3/8
5
6
25
12.7
1/2
5
8
30
15.88
5/8
5
10
35
Do not force beyond the stop point to prevent damaging the shaft
and causing leakage as a consequence.
At the end of the operations:
- refit the valve covering plug
Carefully check for absence of leakages from the closing point of the
plug.
Circuit tightness check
The appliance is tested at the factory and the indoor refrigerating circuit
tightness does not usually need to be checked.
The refrigerating circuit built on site needs to be checked instead.
To check tightness:
- keep the outdoor unit shut-off valves closed
A
High pressure
B
Low pressure
1
Pressure regulator
2
Nitrogen cylinder
3
Pressure gauge unit
4
3-way valve service connection
1
3-way valve service connection
- charge the circuit with nitrogen through the service connection on
the 3-way shut-off valve
