PREPARATION — Service Tools (Cont'd) — Temperature Gauge / Scale / Charging Cylinder
HA-13prose procedureService Tools (Cont'd)
Temperature gauge
Use to check the air conditioner performance. An etched stem type thermometer may be used. A hygrometer must also be used because the air conditioner performance depends on the humidity.
Scale
Measure the weight of the refrigerant to determine how much the refrigerant is charged.
Charging cylinder
The charging cylinder is used to correctly measure the amount of refrigerant to be charged.
Features
With the charging cylinder, the operator can measure correctly the amount of refrigerant to be charged into the system.
Change in the refrigerant volume due to a change in temperature and pressure can be supplemented, and this ensures correct charging of refrigerant.
CAUTION
Never attempt to carry the charging cylinder containing refrigerant.
Do not put the charging cylinder in a hot place. If the temperature and pressure of the refrigerant in the cylinder increase, the safety valve will be pushed open and the refrigerant will be released into the atmosphere.
Do not expose the cylinder to the direct sunlight.
Do not over-charge the refrigerant so that it exceeds the maximum limit of the cylinder.
Do not charge the cylinder with more refrigerant than is needed.