Notes
①
Discharge is allowed unless the unit has been stopped. (Cut off the power and repower it 1 minutes
later)
②
Protective measures should be taken during discharging to avoid frost bites.
③
When discharging is nished, if vacuuming cannot be done immediately, remove the hose to avoid air or
foreign matters entering the unit.
(2) Vacuuming: When discharging is finished, use hoses to connect the charging valve, manometer and
vacuum pump to vacuum the unit.
Note: when vacuuming is nished, pressure inside the unit should be kept lower than 80Pa for at least 30
minutes to make sure there is no leak. Either charging valve 1 or charging valve 2 can be used for vacuuming.
(3) Charging: when vacuuming is nished and it is certain that there is no leak, charging can be done.
◆
Be sure to charge the specied amount of refrigerant in liquid state.
Since this refrigerant is a mixed refrigerant, adding it in gas form may cause the refrigerant composition to
change, preventing normal operation.
◆
Before charging, check whether the refrigerant cylinder is equipped with a siphon tube or not.
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