supermarket refrigerated showcase » article > display refrigerator > R600a fluorine-free walk-in cooler repair fault diagnosis and troubleshooting (3)
R600a fluorine-free walk-in cooler repair fault diagnosis and troubleshooting (3)
R600a fluorine-free walk-in cooler repair fault diagnosis and troubleshooting
walk-in cooler The vacuum pumping time of the system is long, and the pumping process involves intermittent shaking of the compressor , To separate the refrigerant dissolved in the refrigerant oil in the compressor.
It is better to use a high-precision electronic scale to refill the refrigerant. Without replacing the compressor, the refrigerant charge should be 90% of the rating on the walk-in cooler nameplate, because about 10% of the R600a refrigerant is dissolved in the compressor’s mineral oil. Replace the compressor, the refrigerant charge should be rated value + 2g. The empirical method can also be used, that is, the refrigerant bottle is filled with gaseous refrigerant to the pressure balance, the power is turned on to make the compressor run to continue to add the agent, and the refrigerant is stopped when appropriate, and the cooling effect is checked after 2 hours of test machine.
①When the evaporator is evenly frosted and the compressor is running, there is a slight cold feeling in the return air pipe by hand, and there is no condensation or frost in the return air pipe, indicating that the refrigerant charge is just right.
②If the evaporator of the refrigerator compartment is unevenly frosted and frozen, and there is no cold feeling in the return pipe, it means that the refrigerant charge of the walk-in cooler is insufficient. Open the valve to refill (while the compressor is running) a small amount, and observe after repeated operation.
③If the return pipe is too cold and there is a circuit or frost, it means that too much refrigerant has been added. Close the refrigerant bottle valve, unscrew the refrigerant bottle-filling valve connection port, stop the machine, and unscrew the filling valve. A small amount of refrigerant is forbidden to work with electricity, and the site must be well ventilated. Repeat operation and observation.
【Note】Although R600a has a lower rated charge than R12, but because of its small specific gravity, the volume of the walk-in cooler is similar to that of the same volume. Therefore, its refrigerant charge method and maintenance R12 walk-in The cooler is similar, but pay attention to the requirements of fireproof, explosion-proof and good ventilation. For
system sealing requirements, it is best to use Locker ring or ultrasonic welding. If the above-mentioned equipment is not available, the welding method can also be used, but it is necessary to ensure that the sealing pliers clamp the process tube without leakage, and the welding site is well ventilated and meets the flame-proof and explosion-proof conditions. The operation method of
is as follows: After the walk-in cooler stops, seal the compressor process tube (to prevent inhalation of air), first use the sealing pliers to seal the process tube, then unscrew the joint, and then use another one to seal the seal by hand. The pliers clamp the process tube at a distance of 30 mm from the clamp, and use soap to check if there is no obvious leakage.
[Note] When sealing the process tube, the process tube can be annealed with a welding torch, and the nozzle cannot point to itself during welding and sealing.
The above articles are from refrigerated showcase commercial refrigeration and walk-in cooler. For details, please log in: www.ihdjx.com
Free order hotline: +86 1801956nn07573
>>>n
keywords:
Ranking of similar articles
- Dragon fruit reveals ark makes pitaya ornamental fruit
- May 2011 refrigerated showcase Qingyuan Tour
- walk-in cooler disassembly and maintenance method
- Represent the frozen watermelon fruit for storage
- 2012 take care of the old man from the supermarket refrigerated showcase
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- 2013 refrigerated showcase ltd. refrigeration lunar New Year holiday notice
- The structure and working principle of computer-based supermarket refrigerated showcase
- Commercial refrigeration evaporator embedment and production (6)
- Air-conditioner noise?
- The rapid growth of the supermarket walk-in cooler market in refrigeration equipment
- walk-in cooler refrigeration failure and maintenance method (5)
- The air-conditioner doesn't automatically melt frost failure analysis
- display cases Refrigeration failures and maintenance methods (9)
- The general principle of design and layout of display cooler refrigeration system
- Walk-in cooler secondary failure unit refrigeration difference analysis (2)
Latest news articles
- May 2011 refrigerated showcase Qingyuan Tour
- refrigerated showcase Refrigeration Equipment Co., Ltd. growth process
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase display cooler written commercial display cooler legend
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- 2012 take care of the old man from the supermarket refrigerated showcase
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- Dragon fruit reveals ark makes pitaya ornamental fruit
- Watermelon fresh-keeping refrigerator can better preserve the nutrients of watermelon
- Represent the frozen watermelon fruit for storage
- Hairy crabs freezer frozen taste more fresh
- How hairy crabs fresh refrigerated showcase display cooler tell you
- Large supermarket display ark how to choose the right goods
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- Refrigerated showcase ltd. refrigeration has been a leader in innovation and energy saving
- In September 2012, refrigerated showcase west chung
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Correctly use refrigerated showcase supermarket refrigerated showcase the matters needing attention
- , a refrigerated display showcase meat cooler features of the product
- Refrigerated showcase walk - in the cooler is icy