Charging Instructions -------------------------------------------------------------------------------- HC 12aŽ Charging Instructions HC-22aŽ, HC-502aŽ Charging Instructions Existing refrigerant may need to be reclaimed by qualified personnel. The weight of the recovered refrigerant should be recorded. Local regulations may vary by region and the technician should be aware of all applicable requirements. Pull a system vacuum and leak test. Using the weight of the recovered refrigerant, or the system label information, the weight of HC 12aŽ required will be approximately 35% of the weight of the recovered CFC, or approximately 40% of the weight of the recovered HFC refrigerant. Connect gauges and hoses, then with the compressor off, install HC 12aŽ on the low-pressure side of compressor. After a minimum charge is achieved, start the compressor and set system to high. Add additional HC 12aŽ as needed. Do not overcharge the system. After verifying that pressures and temperatures are correct, remove the charging hose and place the HC 12aŽ label (supplied) on the air conditioning system. Ensure all labels are visible and clearly displayed. If additional technical assistance is needed, please call your nearest HC Refrigerant distributor or Northcutt, Inc. directly. The air conditioning system will now operate at cooler inside temperatures and a much lower head pressure, improving energy efficiency. IMPORTANT: The equivalent weight of HC 12aŽ to alternative refrigerants is shown in "NET WT." HC 12aŽ is designed to be charged as a liquid. DO NOT OVERCHARGE. Exceeding 60 psig (414kPa) on low side may damage compressor. In some cases, clearing the site glass overcharges the unit. Also, overcharging may cause loss of cooling efficiency. Operate the system for 24 hours and record temperature and pressures of unit operation. Inspect the system, make any required repairs and perform routine maintenance before charging with HC Refrigerant. Existing refrigerants may need to be removed and reclaimed by qualified personnel. The weight of the recovered refrigerant should be recorded. Local regulations may vary by region and the technician should be aware of all applicable requirements. Perform a system vacuum and confirm that system does not leak. Connect liquid valve from cylinder to gauge manifold. Make sure the charging lines are clean and purged. Connect manifold equipment to the low pressure side of system. Ensure all components have been properly grounded. When charging a large system, the charging equipment, hoses, and system must be grounded to stop a build up of static electricity. When all connections have been made, insure there are no leaks before continuing. Partially closing the suction service valve will reduce the flow from the regular evaporators and speed the transfer of refrigerant from the charging cylinder to the system. Using the weight of the recovered refrigerant, or the system specifications, the weight of HC 22aŽ or HC 502aŽ required will be approximately 40% of the weight of the recovered CFC or HCFC refrigerant. After verifying that pressures and temperatures are correct, remove the charging equipment and attach the HC System label (provided) to the system in a prominent area. -------------------------------------------------------------------------------- EQUIVALENCY INFORMATION HC Refrigerant products are efficient. HC-12aŽ needs only a 40% charge, by weight, of CFC R12, and a 43% charge, by weight, of HFC R134a. HC-22aŽ and HC-502aŽ require only a 40% charge by weight of HCFC R22 and CFC R502. The following table converts our product containers to the respective weights of the refrigerants they replace: HC-12aŽ 6oz can = 15oz of CFC R12 and 14oz of HFC R134a Vanagon holds 52 ounces of coolant total. 52 * 40% is 20.8 ounces 20.8 ounces = 3.46 (6oz) cans of coolant