Atlantic alfea extensa duo+ - Filling the Installation with Gas; Commissioning Procedure

2.7 Filling the installation with gas
" This operation is reserved for installers familiar
with the legislation for handling refrigerants.
" Creating a vacuum with a vacuum pump is
essential (see ANNEX 1).
" Never use equipment used beforehand with any
refrigerant other than a HFC.
" Remove the refrigerant circuit caps only when
building the refrigerant connections.
" Unfavorables conditions :
- If the outdoor temperature is between +5 and
+10 °C, it’s obliged to have a vacuum gauge for
validate the pump down operation and use method
3 empty (see ANNEX 2).
- If the outdoor temperature is below +5 °C,
it’s strongly not recommended to do the lling the
installation with gas.
ANNEX 2
Method 3 empty
- Connect the high pressure hose to the Manifold,
("Gas" connection). A valve must be mounted on
the exible hose from the vacuum pump in order
to isolate it.
a) Pump down to the desired value (see table ANNEX 1),
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
Jeu de manomètres
(manifold)
Basse
pression
Vacuomètre
Pompe à vide
b) Stop the vacuum pump, close the valve end of
the service hose (yellow). Connect the hose to the
expansion valve of the nitrogen bottle, inject 2 bars,
close the exible hose valve,
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
Azote
c) Reconnect the exible hose to the vacuum pump,
turn on and gradually open the hose valve.
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
d) Repeat this at least three times.
" Reminder : It’s strictly forbidden to perform
these operations with refrigerant.
ANNEX 1
Method for calibration and control of a vacuum
pump
- Check the oil level of the
vacuum pump.
- Connect the vacuum pump
with the vacuum gauge
according to the scheme.
- Pump down during 3 minutes.
- After 3 minutes, the pump reaches its threshold
value and the vacuum gauge needle does not move.
- Compare the obtained pressure with the value of the
table. Depending on the temperature, this pressure
must be less than the value indicated in the table.
=> If it’s not the case, replace the gasket, exible
hose or the pump.
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 . . . .
Vacuomètre
Flexible
bouché
Pompe
à vide
Clogged
exible
hose
Manometer kit
(Manifold)
Low
pressure
High
pressure
High
pressure
High
pressure
Vacuum
pump
Vacuum
pump
Vacuum pump
Nitrogen
Connection
Liquid
Connection
Liquid
Connection
Liquid
Gas
Gas
Gas
Vacuum
gauge
Vacuum gauge
2.7.1 Commissioning procedure
• Check before connecting
"Gas" connection control (large diameter).
- Connect the "Gas" connection to the outdoor unit.
- Blow dry nitrogen into the "Gas" connection and
observe this end:
 If water or impurities emerge, use a new refrigerant
connection.
 Otherwise, perform the are and connect immediately
the refrigerant connection to the hydraulic unit.
"Liquid" connection control (small diameter).
- Connect the "Liquid" connection to the outdoor unit.
- Blow dry nitrogen into "Gas" connection – condensor
- "Liquid" connection assembly and Observe this
end (Outdoor unit side).
 If water or impurities emerge, use a new refrigerant
connection.
 Otherwise, perform the are and connect immediately
the refrigerant connection to the outdoor unit.
Installation and operating manual "1578 - EN" - 19 -
Heat Pump alféa extensa duo +