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It is important that proper diagnostic tools be used to determine the source of leaks. To properly diagnose the location of a leak, always use high pressure nitrogen psig and an electronic leak detector or soap bubbles to confirm the leak location.
For that reason, care must be taken to minimize the time the refrigerant system is open and to maintain proper nitrogen charge during repair. As part of the repair, new driers must be installed to capture remaining moisture left in the system. If the outdoor unit is being repaired due to a compressor burnout possibly caused Sheep - Various - World Of Acid a refrigerant leakit is likely that additional contamination is present in the refrigeration system.
Step 1 — Verify system integrity by checking system pressure. Use a manifold gauge set to see if the system is still under pressure or if it is empty and void of charge. If the system is Zodijackyl Light - Various - Rock Extremum 2 pressure you may be able to leak check with the charge left in the system using bubbles or electronic testers.
If not, the remaining charge must be reclaimed and disposed of or reused per EPA regulations. After reclaiming the remaining refrigerant, note the weight removed. At this time, access the evaporator section to check for the presence of refrigerant. In most cases you will be able to hear the leak if it is an obvious one. Look for signs of oil as Ra and oil bond, a leak will leave an oil trail. If system is void of charge and under nitrogen pressure, the leak cannot be either heard or visually seen then you must use an electronic leak detector.
Step 2 — Electronic Leak Detection. If the system is void of refrigerant and the above step yields no leak that can be seen or heard, use of an electronic leak detector is mandatory.
This is required 005 - Kraftwærk 8000* / Rectal Leak - Split you will have a tracer amount within the system so the detector can register a leak. Release of this tracer gas combination is considered a diminimus release.
Step 3 — Pinpoint leak location. When the leak is found, use soap bubbles to get a pin point location. You might need an inspection mirror along with a bright flash light to accomplish. Step 4 — Repair the leak. If the leak is in the tube sheet of the MicroChannel coil aluminum portion the technician has the option of replacing the coil or repairing the coil using an aluminum repair kit available from Source One.
A leak at the 005 - Kraftwærk 8000* / Rectal Leak - Split joint should never be repaired in the field as this braze joint requires sophisticated process controls not normally available in the field. Such a leak requires a coil replacement. Step 5 — Remove the original factory filter drier in the condensing unit, then install a new liquid line filter drier. After the system is operational, additional steps are required to run the system until contaminants are removed.
Step 6 — Confirm leak repair. Pressure test the system psig refrigerant tracer gas and leak check with soap solution or electronic leak detector. If leak is still present then repeat previous steps until leak is repaired. Step 7 — Introduce calculated charge volume addition. Slowly open suction manifold valve and monitor refrigerant scale until volumetric charge adder is met. Remember to reduce charge adder by 3 ounces from the total calculated value to account for the charge present in the gauge hoses assuming two 3 foot gauge hoses to avoid overcharging the system.
Step 8 — Validate charge value is correct and system is operating properly. Please refer to the charging charts on the condensing unit to determine proper subcooling for TXV applications or superheat for orifice applications. The charts are based on outdoor ambient conditions. If the refrigerant system was opened as a result of a compressor burnout, additional steps are required to ensure absorption of contaminants left in the system.
Run the system for 10 hours, then monitor the suction line drier pressure drop. If the pressure drop exceeds 3 psig, replace suction line filter drier and re-run the system for another 10 hours. If the 005 - Kraftwærk 8000* / Rectal Leak - Split drop is less than 3 psig, remove the suction line drier, and perform an acid test. If the test shows no presence of acid, remove the suction filter dryer and close system. Re-establish system integrity by performing high pressure nitrogen leak check.
If the acid test shows acid still present in the system, replace suction line drier 005 - Kraftwærk 8000* / Rectal Leak - Split re-run the system for another 10 hours. Repeat this process until acid is not present in the system. Note that the suction filter drier can be run for more than 10 hours, but never leave the suction line drier in the system for over 50 hours of operation as this could lead to further contamination and compressor failure.
Step 9 — Record your data. Record the total system charge and date on inside panel. This should be done adjacent to wiring diagram. This will be useful for the next service technician. Beside bupping a deep vacuum, this will assure a dry system. In a worse case, youy may need to remove as muxch oil as possible from the crank case of 005 - Kraftwærk 8000* / Rectal Leak - Split compressor, replace the oil, and then start the process all over again.
After brazing all connections using nitrogen in the line, I pressurized lines and coil to lbs …. I get a drop of about 0. All brazes and all connections incuding nitro and manifold connections show no air bubbles using soap. Brad — did the old unit have a history of losing refrigerant? Life Is You - Seenlum - Seenlum yes, then it could be the line 005 - Kraftwærk 8000* / Rectal Leak - Split.
If not, then you need to look at all components, fittings, metering devices, etc and find the source of the leak. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Sign me up! York Central Tech Talk.
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