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3-2. Use R410A exclusive cylinder only.
When charging with a refrigerant cylinder, use an
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 charging
cylinder is less than 20%. Also, charge the minimum
necessary amount to the charging cylinder before
using it to charge the air conditioning unit.
Configuration and characteristics of cylinders
Single valve
Charge liquid refrigerant with
cylinder in up-side-down position.
Single valve (with siphon tube)
Charge with cylinder in normal position.
Fig. 1
Fig. 2
Valve
Liquid
Valve
Liquid