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Charging refrigerant
Installer and user reference guide
106
LRYELRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
INFORMATION
The capacity up unit is a pre charged closed circuit. There is no need to add
additional refrigerant charging.
18.5 To charge refrigerant
1
Turn ON the power supply of the outdoor unit and all indoor units (air
conditioners, blower coils, showcases).
2
Turn OFF the operation switch of the outdoor unit.
3
Charge refrigerant from the charge port of the stop valve (d1) on the
refrigeration liquid side. Keep the stop valve closed. See
4
When charging is finished, open all stop valves.
5
Attach the valve caps to the stop valves and service ports.
Pressure difference too low
If the pressure difference between the charging cylinder and refrigerant piping is
too low, you cannot charge anymore. Continue as follows to decrease the pressure
in the piping and to be able to continue charging:
1
Open the gas stop valves on refrigeration and air conditioner side (c1, c2) and
the liquid stop valve on air conditioner side (d2).
2
Adjust the opening of the liquid stop valve on refrigeration side (d1). In case of
long field piping length, the outdoor unit will automatically stop when
charging refrigerant with the liquid stop valve fully closed.
3
Turn ON the operation switch of the outdoor unit. The pressure in the
refrigerant piping will drop, and charging can be continued.
4
When the refrigerant is charged, fully open all gas and liquid stop valves.
WARNING
After charging refrigerant, keep the power supply and operation switch of the
outdoor unit ON to avoid a pressure increase on the low pressure (suction piping)
side and to avoid pressure increase on the pressure side of the liquid receiver.
INFORMATION
After charging, add the total amount of refrigerant to the name plate on the front
panel of the unit.