Air Conditioning - Commercial Air Conditioners & OEM Parts Outlet, New York
R410A Conversion & Line Set Flushing

R410A Refrigerant Conversion Instructions Using
Nu-Calgon Rx11-Flush To Purge Air Conditioning Line Sets

By Zack Paterson (JD Supply HVAC Equipment, Parts, & Supplies Outlet, New York)

Nu-Calgon Rx11-Flush 1 lb, 2 lb, 13 lb Canisters

Air Conitioning Line Set

Nu-Calgon Flush Accessories

The Problem - Contaminated Refrigerant

Occasionally, refrigeration and air conditioning systems suffer failures, such as compressor burnout, which can result in contamination of the refrigerant liquid and system with unwanted particulate, sludge, acids, carbon residues or moisture. Following repair, the entire refrigeration system needs to be purged of these contaminants before it is put back into operation.

Traditional R11 Flushing Caused Environmental Issues

R11, a ChloroFluoroCarbon (CFC) based solvent, was previously used to efficiently and effectively flush such contaminated air conditioning and refrigeration systems. However, we now understand that CFC´s can contribute towards depletion of the Earth´s atmospheric Ozone Layer, and so R11 has been gradually phased out of production and usage.

The Benefits Of Nu-Calgon Rx11-Flush

Nu-Calgon Rx11-Flush was specifically developed to offer the benefits of R11 without the environmental concerns. This product uses state-of-the-art HydroFluoroCarbon (HFC) technology, and is even more effective than R11. It dries quickly, has a low boiling point, will not attack refrigeration system components, and it provides for greater worker safety without attacking the Ozone Layer.

Furthermore, with the new 13 SEER (Seasonal Energy Efficiency Ratio)-rated refrigeration and air conditioning equipment, and the continued retrofit to R-410A based equipment, the Nu-Calgon RX11-Flush is perfect for purging line sets to prepare for the conversion.

Nu-Calgon Rx11-Flush Is Now The Prescribed Industry Standard
For Flushing Refrigeration And Air Conditioning Systems

Nu-Calgon Rx11-Flush is very effective in system clean-up after compressor burnouts, perfect for flushing line sets in advance of conversion to R410A, and is approved as part of the Environmental Protection Agency´s Significant New Alternatives Program (SNAP).

General Guidelines For Using Nu-Calgon Rx11-Flush:

• Use only appropriate refrigerant, proper recovery equipment, components, tools and lubricants as established in the industry.
• Do not inject Rx11-Flush solvent into the compressor itself, only the supporting refrigeration system should be flushed.
• Large systems or systems with unusual configurations that could trap the solvent should be disassembled and flushed individually by section.
• The exact amount of Rx11-Flush required will vary by the internal design of the system, the nature of the failure, the degree of contamination trapped in the system and the temperatures at which the failure occurred.
• If the system to be flushed includes larger components such as a receiver, Nu-Calgon recommends visual inspection. If these components appear to be contaminated, and are small enough to be flushed with Rx11-Flush, this may be done. If they are too large to economically flush with Rx11-Flush, use a traditional degreasing solvent such as Degreasing Solvent ef.
• Never connect the Rx11-Flush canister to Nitrogen via manifold sets or other charging hoses. Failure to ensure the system is free of pressure when injecting Rx11-Flush may cause the canister to burst.

Nu-Calgon Rx11-Flush Capacity Guidelines:

Equipment Required For Rx11-Flush System Flushing Operations:

• Nu-Calgon Rx11-Flush Injection Tool Part # 4300-99, and a standard refrigerant charging hose to inject the solvent into the system. These tools should be dedicated to this flushing procedure only.
• A small, re-sealable waste container that will hold the used Rx11-Flush solvent after it is flushed through the system. Exiting solvent must be visible so that it can be inspected during the flush to determine when the solvent begins to run clean - indicating the system is purged.
• A tank of clean, compressed Nitrogen regulated to 120 psi. The tank must have a dispensing hose and will be used to purge the solvent from the system.
• A vacuum pump with the appropriate hoses and clamps.
• Personal Protective Equipment should include face protection and rubber gloves.
• Adequate Ventilation is highly emphasized.

Recommended Nu-Calgon Rx11-Flush Accessories:

Nu-Calgon Part #s: