Fig. 2
Fig. 1
Fig.3
(5) Recharging
•
Be sure to charge the specified amount of
refrigerant in liquid state
using the service port of
the wide tube service valve. The proper amount is
listed on the unit's nameplate.
When the entire amount cannot be charged all at
once, charge gradually while operating the unit in
Cooling Operation.
Never charge a large amount
of liquid refrigerant at once to
the unit. This may cause dam-
age to the compressor.
• When charging with a refrigerant cylinder, use the
electronic scale for charging refrigerant. In this case, if
the volume of refrigerant in the cylinder becomes less
than 20% of the fully-charged amount, the composition
of the refrigerant starts to change. Thus,
do not use
the refrigerant if the amount in the refrigerant
cylinder is less than 20%.
Also, charge the minimum necessary amount to the
charging cylinder before using it to charge the air
conditioning unit.
Example:
In case of charging refrigerant to a unit requiring
0.76Kg using a capacity of a 10Kg cylinder, the
minimum necessary amount for the cylinder is:
0.76 + 10 x 0.20 = 2.76Kg
For the remaining refrigerant, refer to the
instructions of the refrigerant manufacturer.
• If using a charging cylinder, transfer the specified
amount of liquid refrigerant from the refrigerant
cylinder to the charging cylinder.
Prepare an evacuated charging cylinder beforehand.
To prevent the composition
of R410A from changing,
never bleed the refrigerant
gas into the atmosphere
while transferring the refrig-
erant. (Fig. 3)
Do not use the refrigerant if the amount in the
charging cylinder is less than 20%.
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