Sanyo SAP–KR184GJ Technical & Service Manual page 45

(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.
CAUTION
• 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.
CAUTION
Do not use the refrigerant if the amount in the
charging cylinder is less than 20%.
Never charge a large amount
of liquid refrigerant at once to
the unit. This may cause dam-
age to the compressor.
To prevent the composition
of R410A from changing,
never bleed the refrigerant
gas into the atmosphere
while transferring the refrig-
erant. (Fig. 3)
Liquid
Single valve
Charge liquid refrigerant with
cylinder in up-side-down position.
Single valve (with siphon tube)
Charge with cylinder in normal position.
Charging
cylinder
Open
45
Valve
Fig. 1
Valve
Liquid
Fig. 2
NO!
Liquid
Refrigerant
cylinder
Fig.3