•
First seal test
- Remove the protective plugs (
B
) from the charging
hole (
Schrader
) in the "Gas" valve (large diameter).
- Connect the high pressure hose to the
Manifold
- Connect the bottle of nitrogen to the
Manifold
(Use only dry nitrogen type U).
- Pressurize the refrigerant circuit with nitrogen
(10 bar maximum) ("Gas" connection – condensor -
"Liquid" connection assembly).
- Let the circuit under pressure for 30 minutes.
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
Azote
10 bars max.
30 mn mini
High
pressure
Nitrogen
Max. 10 bar
during 30 mn mini.
Connection
Liquid
Gas
- Search for leaks with a leak detector product, repair
and repeat the test.
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
Contrôle
d’étanchéité
Vanne fermée,
Contrôle pression
High
pressure
Closed valve,
pressure control
Leak control
- When the pressure is stable and leakage is excluded,
drain nitrogen letting a pressure above atmospheric
pressure (0,2 to 0,4 bar).
• Creating a vacuum and filling the refrigeration
connections with gas
- If necessary, calibrate the
Manifold
gauge to 0 bar.
Adjust the vacuum gauge to the atmospheric pressure
(around 1013 mbar).
- Connect the vacuum pump to the
Manifold
. Connect
a vacuum gauge if the vacuum pump is not equipped.
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
Vacuomètre
Pompe à vide
Vacuum pump
High
pressure
Vacuum pump
Connection
Liquid
Gas
Vacuum gauge
- Create a vacuum until the residual pressure* in the
circuit falls below the value given in the following table.
(* measured with the vacuum gauge).
T °C
5°C<T<10°C 10°C<T<15°C
15°C < T
Pmax
- bar
- mbar
0 009
9
0 015
15
0 020
20
- Let the pump continue to operate for another
30 minutes minimum after reaching the vacuum.
- Close the
Manifold
valve and then stop the vacuum
pump
without disconnecting any of the hoses in
place
"
If the outdoor temperature is between +5 and
+10 °C, use method 3 empty (see ANNEX 2).
- Remove the access plugs (
A
) from the valve controls.
- If an additional charge is requires, add the additional
charge before filling the hydraulic unit with gas. Please
refer to the
para.
"Additional charge", page 21.
- First of all fully open the "Liquid" valve (small)
and then the "Gas" valve (large) using a hex key
(counterclockwise
direction)
without
forcing
excessively against the stop.
- Remove the hose rapidly to the
Manifold
- Refit the 2 original caps (be sure they are clean) and
tighten them to the recommended tightening torque
(
figure 17, page 17)
. The sealing is performed in the
caps only metal to metal.
The outdoor unit does not contain any additional
refrigerant, enabling the installation to be purged.
Flushing is strictly forbidden.
2 .7 .2 Sealing test
The sealing test must be performed with a certified gas
detector (sensitivity 5g/year).
Once the refrigeration circuit has been gassed as
described above, check that all the refrigeration connectors
are gas-tigh (4 connectors). If the flarings have been made
correctly, there should be no leaks. Eventually, check the
tightness of the refrigerant valves caps.
"
If there is a leak:
- Bring the gas into the outdoor unit (pump down).
The pressure should not drop below atmospheric
pressure (0 bar to read on
Manifold
) so as not to
contaminate the recovered gas with air or moisture.
- Make the connection again.
- Repeat the commissioning procedure.
figure 19 - Connection of the hose on the "Gaz" valve
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
High pressure hose (red)
Refrigeration connecxion (Gas)
Installation and operating manual "1572 - EN"
Heat pump air/water split 2 services alféa excellia duo
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