| 1. |
Recover the existing refrigerant charge into a suitable container. Local regulations may vary from region to region. Do not mix refrigerants. |
| 2. |
Pull a system vacuum to -69 kPa (-10 psig). |
| 3. |
Connect gauges and hoses, then with compressor off, INSTALL DURACOOL 12aŽ on low-pressure side of compressor. Adjust needle valve on tapping device to establish flow rate. (Overturning needle valve will stop flow.) After a minimum charge is achieved, start compressor and set system to high. |
| 4. |
Add additional DURACOOL 12aŽ as needed. |
| 5. |
After verifying that pressures and temperatures are correct, remove the charging hose and place the DURACOOL 12aŽ label (which is supplied) on the air conditioning system. Ensure all labels are visible and clearly displayed. |
| 6. |
Remember that DURACOOL 12aŽ is flammable and should only be leak tested with an electronic hydrocarbon leak tester, soap bubbles or fluorescent tracer fluid. If leaks are detected ventilate the area, keep away from naked flames and repair the leak. After repair, continue with the charging procedure. |
| 7. |
If a system has been overcharged or has a leak and must be re-charged, evacuate the system and start the charging procedure over. |
| 8. |
If additional technical assistance is needed please call your nearest DURACOOL 12aŽ distributor in your area or DURACOOLŽ directly. |
| 9. |
Your system will now operate with a much lower head pressure, energy efficiency will improve greatly and customer will notice the cooler changes in temperature.
LABEL YOUR SYSTEM
IMPORTANT PLEASE NOTE: The equivalent weight of DURACOOL 12aŽ to alternative refrigerants is shown in "NET WT." DURACOOL 12aŽ is designed to be charged as a liquid
DO NOT OVERCHARGE Exceeding 414 kPa (60 psig) on low side may damage compressor. In some cases, clearing the site glass overcharges the unit. Any overcharging may cause loss of cooling efficiency.
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| 1. |
Obtain a 24-hour temperature and pressure record of unit operation, carefully check the refrigeration system and record necessary repairs to be made before converting the system. |
| 2. |
Recover the existing refrigerant charge into a suitable container. Existing refrigerants must be removed and reclaimed by qualified personnel only. The weight of the recovered refrigerant should be recorded. Local regulations may vary from region to region. Do not mix refrigerants. |
| 3. |
Perform any routine maintenance and complete necessary repairs to system |
| 4. |
Pull a system vacuum to -69 kPa (-10 psig). |
| 5. |
Connect cylinder liquid valve to gauge manifold, charging lines must be clean and purged. |
| 6. |
Connect mainfold apparatus to the low-pressure side of system. Ensure all components have been properly grounded. If a large system is to be charged the charging equipment, hoses and system must be earthed to prevent a build-up of static electricity. |
| 7. |
Check connections for leaks. |
| 8. |
Charging may be speeded up by partially closing the suction service valve to reduce flow from the regular evaporators and speed the transfer from the charging cylinder. |
| 9. |
Typically refrigerant charge of DURACOOLŽ is 40-41% of the weight of CFC, HCFC OR HFC Refrigerants. |
| 10. |
After verifying that pressures and temperatures are correct, remove the charging hose and place the DURACOOLŽ label (which is supplied) on to the system. Ensure all labels are visible and clearly displayed. |
| 11. |
Remember that DURACOOLŽ is flammable and should only be leak tested with an electronic hydrocarbon leak tester, soap bubbles or florescent tracer fluid. If leaks are detected ventilate area, keep away from naked flames and repair the leak. After repair, continue with the charging procedure. |
| 12. |
If additional technical assistance is needed please call your nearest DURACOOLŽ distributor in your area or DURACOOLŽ directly. |
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