2.7
Filling the installation with gas
F
This operation is reserved for installers
familiar with the legislation for handling
refrigeration fluids.
F
Creating a vacuum with a vacuum pump is
essential.
F
Never use equipment used beforehand with
any refrigerant other than a HFC.
2.7.1
Creating a vacuum and filling the
refrigeration connections with gas
(see figure 22).
-
Remove the protective plugs (B) from the charging
hole (Schrader) in the gas valve (large diameter).
-
Connect the blue hose (on the side with a valve
pusher in good condition) from the set of
manometers (manifold).
-
Connect the yellow hose to a vacuum pump and
open the blue valve on the set of manometers.
-
Create a vacuum until the residual pressure in the
circuit falls below 0.01 bar.
-
Let the pump continue to operate for another 15
minutes after reaching the vacuum.
-
Close the blue valve on the set of manometers and
then stop the vacuum pump
w ithout
disconnecting any of the hoses in place
.
-
Wait 10 minutes. If the pressure rises during this
10-minute period, there is a leak in the circuit. Trace
it and repair it: then start again.
When the pressure has remained stable for 10
minutes after the vacuum pump stops, the circuit is
considered to be gas-tight.
-
Remove the access plugs (A) from the valve
controls.
F
If an additional charge is requires, add the
additional charge before filling the hydraulic
module with gas. Please refer to the section
(“Additional charge”, page 22).
-
First of all fully open the small valve and then the
large one using a hex key (counterclockwise
direction) without forcing excessively against the
stop.
-
Remove the blue hose rapidly.
-
Refit the 2 plugs and tighten them to the
recommended tightening torque (see figure 21).
The outside unit does not contain any additional
refrigerant, enabling the installation to be purged.
Flushing is strictly forbidden.
2.7.2
Sealing test
Once the refrigeration circuit has been gassed as
described above, check that all the refrigeration
connectors are gas-tight:
6 connectors for models 050 and 065, 5 connectors
for model 080 and 4 connectors for models 095, 128
and 155.
The sealing test must be performed with an
approved gas detector.
If the flarings have been made correctly, there should
be no leaks.
If there is a leak, make the connection again.
Installation and operating manual “1350-EN”
21
Heat pump, Split, single service
Figure 22 - Extraction under vacuum and gassing
Lo
Hi
Manometer kit
(manifold)
Vacuum pump
Service hose
Low
pressure
High
pressure
Gas valve
Large diameter
Vacuum meter
Refrigeration connexion
Plug (A)
Hex / Allen key of 4 mm
3-way valve
Load orifice
Plug (B)
Service hose (blue)
fitted with valve push-button