Fujitsu Waterstage Split Comfort 5 Series - Appendix; Filling the Installation with Gas

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 Appendix
►
Filling the installation with gas
This operation is reserved for installers familiar with the legislation for handling refrigerants.
Creating a vacuum with a calibrated vacuum pump is essential (see APPENDIX 1).
Never use equipment used previously with any refrigerant other than a HFC.
Only remove the refrigeration circuit caps when performing the refrigeration connections.
APPENDIX 1
Method for calibrating and checking a vacuum
pump
- Check the vacuum pump's oil level.
- Connect the vacuum pump
to the vacuum gauge as
shown in the diagram.
- Pump down for 3 minutes.
- After 3 minutes, the pump
reaches its threshold vacuum limit and the vacuum
gauge's needle stops moving.
- Compare the obtained pressure value against the
table of values. Depending on the temperature, this
pressure should be lower than that shown in the
table.
=> If this is not the case, replace the gasket,
hose or 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
APPENDIX 2
Triple Evacuation Method
- Connect the Manifold high-pressure hose to the
fi lling hole (gas connection). A valve must be fi tted
to the vacuum pump's hose so you can shut it off .
a) Create a vacuum until the desired value is
reached and maintain this value for 30 mins
(see table in APPENDIX 1),
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
Jeu de manomètres
(Manifold)
Basse
pression
Vacuomètre
Pompe à vide
Manometers kit
(Manifold)
Low
Pressure
High
Pressure
Vacuum pump
Connection
Liquid
Gas
Vacuum
Gauge
b) Switch off the vacuum pump, close the valve at
the end of the service hose (yellow), connect this
hose to the expansion valve on the nitrogen bottle,
fi ll to 2 bar, close the hose's valve again,
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
Azote
High
Pressure
Nitrogen
Connection
Liquid
Gas
c) Connect this hose to the vacuum pump again,
switch it on and slowly open the hose's valve.
Lo
Hi
UE
MH
Liaison...
liquide
gaz
Haute
pression
High
Pressure
Connection
Liquid
Gas
d) Repeat this operation at least three times.
Remember: performing these operations using
refrigerant is strictly prohibited.
If the outdoor temperature is below +10°C
- You must use the triple evacuation method
(see APPENDIX 2).
- We recommend installing a dehydrator fi lter
(and this is highly recommended if the outdoor
temperature is below +5°C).
Vacuomètre
Flexible
bouché
Pompe
à vide
Plugged
hose
Vacuum
pump
Vacuum
gauge
OU
HU
OU
HU
OU
HU
Waterstage Split Comfort DHW Serie / INSTALLATION / 2125 - EN