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Freezers how refrigerant charging refrigerant recharge freezer is a common wire method, then at the time of charging refrigerant, what problem should note?
How to charge is right, how to grasp?
Below price and freezers to learn this knowledge together.
Charging refrigerant, because R600a refrigerator compressor is working, process pipe pressure for negative pressure, therefore cannot be filled volume of the pressure gauge pressure through observation judgment whether enough.
Electronic scale (
For precision & plusmn;
When available electronic weighing filling, filling quantity for the nameplate marking value.
No electronic said, according to the following method: A.
Refrigerant bottle bottle up, gas filling.
First stop filling, to pressure balance (
At this point, the refrigerant has stopped into the freezer, has entered the refrigerant about dozens of grams of ice chest)
Switch the freezer on and make the compressor starts, at this time due to the effect of time of the compressor, refrigerant to continue into the freezer, about 15 seconds, close the valve, stop adding refrigerant.
Commissioning, two hours after observation: such as: a.
Muffler with hands slightly cold feeling.
Back to the trachea no condensation and frost phenomenon.
The freezer is normal, it can be finished according to the requirements of conventional cooling performance and electrical safety performance, complete maintenance.
Such as: muffler without cold feeling.
Appear this phenomenon said not enough refrigerant, open the valve cover note (
A small, repeat points D operation.
Such as: back to the trachea too cold, condensation or frost phenomenon appears the phenomenon said too much refrigerant, close the refrigerant valves, unscrewed the refrigerant cylinder connected to the filling valve mouth, downtime, unscrewed the filling valve to put away a small amount of refrigerant (
Deflated, stop with fire, and make sure the well ventilated)
Operation, repeat point D.
R600a while filling quantity relatively less R12, but due to their specific gravity are small, therefore, looked from the volume, filled volume of the same freezer of similar, therefore, its filling and maintenance of refrigerant gimmick R12 freezers.
Point of operation requires a certain experience.
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