Evacuation of cycle
Prevent non-condensible gases, such as air, from permeating into the cycle.
Air or non-condensible gases in the refrigerant cause a decline in cooling capacity and a rise in input wattage
due to high discharge pressure.
In particular, air(Oxygen) cause the generation of sludge and shortening of compressor life. Therefore, the
non-condensible gas in R134a system must not exceed 1%(vol.)
The recommendable vacuum level is under 0.08 Torr(mmHg), and the evacuation time must be 40 minutes or
more with the capacity of vacuum pump of 300 LT/min or more.
The vacuum pump should be used exclusively, and it is better to vacuum simultaneously in high and low pressure
sides with a pump per system.
It is not allowed that putting electric power into the compressor with a vacuum condition, then electric spark will
be occurred in the compressor and compressor can be damaged critically. (Vacuum Discharge)
松下3CC171LAOM _参数_报价...