Filling The Installation With Gas - Fujitsu Waterstage WOYA060LFCA Installation And Operating Manual

Air to Water Heat Pump, split system
3 .4

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.
" If the outdoor temperature is below +10 °C:
- You must use 3 empty method. (see ANNEX 2).
- It is advised to install a dehydrator filter
(and highly recommended if the outdoor
temperature is below +5 °C).
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, flexible
hose or the pump.
T °C 5°C<T<10°C
Pmax
- bar 0 009
- mbar 9
- 24 -
Vacuum
gauge
Clogged
Vacuomètre
flexible Flexible Vacuum
hose pump
bouché
Pompe
à vide
10°C<T<15°C 15°C < T
0 015 0 020
15 20
ANNEX 2
Method 3 empty
- Connect the high pressure hose to the Manifold,
("Gas" connection). A valve must be mounted on
the flexible hose from the vacuum pump in order
to isolate it.
a) Create a vacuum until the desired value and
maintain this value during 30 min (see table Annex 1),
Manometer kit
Jeu de manomètres
(Manifold)
(Manifold)
High
Low Basse Haute
Lo Hi
pressure
pressure
pression pression
Connection
Liaison...
UE
Liquid liquide
gaz
Gas
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 flexible hose valve,
High
Haute
Lo Hi
pressure
pression
Liaison...
Connection
UE
Liquid liquide
gaz
Gas
c) Reconnect the flexible hose to the vacuum pump,
turn on and gradually open the hose valve.
Haute High
Lo Hi
pressure
pression
Liaison...
Connection
UE
Liquid liquide
gaz
Gas
d) Repeat this at least three times.
" Reminder : It's strictly forbidden to perform
these operations with refrigerant.
Installation and operation manual "1764 - EN"
Vacuum gauge
Vacuomètre
MH
Vacuum pump
Pompe à vide
Nitrogen
Azote
MH
MH