Technical Information

IceCOLD® catalyst #2 is ONLY used for DX (direct expansion) systems. It is important to know that Catalyst #2 is only effective when it passes through a DX valve or capillary – the shock wave of the pressure drop will cause #2 to attach itself to hydrogen atoms* of the refrigerant, increase its specific molal concentration, and cause it to evaporate (boil) at a lower temperature.

Do not use IceCOLD® in screw compressors systems with a coalescing oil filter
Do not use IceCOLD® in screw compressors systems with a coalescing oil filter as catalyst #1 will break the surface tension of the compressor oil, the oil vapor will no longer coalesce on the fine filter mesh grid, and the compressor will pump too much oil into the system, reducing BTUs and dangerously lowering the compressor’s oil reservoir.
Do not use IceCOLD® in screw compressors systems with a coalescing oil filter as catalyst #1 will break the surface tension of the compressor oil, the oil vapor will no longer coalesce on the fine filter mesh grid, and the compressor will pump too much oil into the system, reducing BTUs and dangerously lowering the compressor’s oil reservoir.

R717 screw compressors with hot gas defrost is less effective as the hot gas defrost will temporarily remove the oil-fouling in the evaporator as these screw compressors produce a 130 degree rise in refrigerant temperature, thinning the oil to the point were some oil-fouling will flow out of the evaporator temporarily un-fouling it. At some time later during normal cooling operations, the evaporator will re oil-foul. In any case most screw compressors have coalescing filters so #1 cannot be used.

Some R22 and R404 and other non-R717 refrigeration systems have hot gas defrost – note that this will decrease the effectiveness of IceCOLD® but savings are still good (but not stellar).

Note that this does NOT apply to the common electric heater defrost common in most refrigeration systems. Note also that Catalyst #1 in IceCOLD® is ineffective in R11 and R123; these refrigerants are such powerful solvents that there is no oil fouling in these refrigerant systems. Catalyst #2 is still effective as is the lubricity agent.Some R22 and R404 and other non-R717 refrigeration systems have hot gas defrost – note that this will decrease the effectiveness of IceCOLD® but savings are still good (but not stellar).

Note that this does NOT apply to the common electric heater defrost common in most refrigeration systems. Note also that Catalyst #1 in IceCOLD® is ineffective in R11 and R123; these refrigerants are such powerful solvents that there is no oil fouling in these refrigerant systems. Catalyst #2 is still effective as is the lubricity agent.

The more complex the refrigerant, the better Catalyst #2 works; it works well in R22 and R404, even better in R134a and even better yet in R410a. It has high effect in R407c, and R422d and NU22. We are using IceCOLD® in R22a and other brands of petroleum refrigerants also. IceCOLD® has not been tested in CO2 refrigerants.

Catalyst #1 is used in R717 ammonia with good effect as long as there is no coalescing oil filter (successfully used on reciprocating compressors). Catalyst #2 has not been tested in R717 but should work well; a proof of concept test is being sought – do not use Catalyst #2 in R717 until approved.

IceCOLD® is commonly installed at 10% IceCOLD® to the total oil charge.
Experience shows that on refers, we use 8 ounces of IceCOLD® in a 2 ½ ton refer’ and 12 ounces of IceCOLD® in a 5 ton refer. NO compressor oil is removed in this process. DO NOT add the IceCOLD® to the refer’ engine (motor) oil. Does not matter if the refer’ is on a trailer, rail car or container.
Do not forget that IceCOLD® is commonly installed at 10% IceCOLD® to the total oil charge; for instance a Copeland 5 ton scroll compressor holds 66 ounces of IceCOLD® – so we need to add 6.6 ounces of IceCOLD®.
Do not forget that IceCOLD® is commonly installed at 10% IceCOLD® to the total oil charge; for instance a Copeland 5 ton scroll compressor holds 66 ounces of IceCOLD® – so we need to add 6.6 ounces of IceCOLD®.

Therefore; Catalyst #1 and #2 are added without lubricity agent to the refrigeration circuit.