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Is It Possible To Use R-22 In A 407C Condenser?

Is It Possible To Use R-22 In A 407C Condenser?

You might be curious as to whether R-22 is compatible with 407C condensers. Well, don’t waste too much time looking because we have already done the study to find the answer to this.

Technically, the R-407C condenser unit can use R-22 as a refrigerant. However, R-22 production and use are already illegal in the United States due to federal regulations. Therefore, you have other choices for your 407C condenser. See the alternatives below:

  • R-407A
  • R-32
  • R-444B
  • R-410A

We’ll discuss condensers, refrigerants, and everything in between in this article. We’ll determine whether R-22 is permitted in a 407C condenser unit and how this impacts ventilation.

Can R-22 Be Used In A 407C Condenser?

Is It Possible To Use R-22 In A 407C Condenser?

The refrigerant 407C, often referred to as R-407C by different manufacturers, is appropriate for condenser units that operate with less energy. In comparison to other refrigerants, it is less expensive and easier to replace. Some tin-coated copper evaporated coils combine well with R-407C.

Condenser units designed exclusively for R-407C are available. This will guarantee proper sizing and effective operation.

However, R-22 is a refrigerant that is utilized in the majority of HVAC systems, including air conditioners. In an HVAC system, refrigerant is moved about by motors like the evaporator and condenser, to give a simple explanation. The temperature then drops as a result of the refrigerant’s ongoing transition from liquid to gas.

In an R-407C condenser, R-22 can be used, but only if you speak with an HVAC professional before making the conversion. The motor may be harmed by a sudden shift in refrigerant, rendering the device useless.

However, because to some health and environmental concerns, the US government mandated that R-22 manufacture and use cease. R-22 can be replaced by different substances, though.

Remember that an HVAC specialist should properly analyze and approve any changes to the refrigerant. A change to a different refrigerant could seriously harm the appliance. You can also inquire about the appropriate refrigerant from the manufacturer.

Alternative choices are listed below.

Refrigeration systems that operate at medium to low temperatures frequently use R-407A. It has a lower GWP—or potential to contribute to global warming—than other refrigerants. The risk to the environment is lower with R-407A.

It should be used in the proper unit size, nevertheless, to enable effective temperature regulation. For instance, it may become less effective if the temperature drops below -20 degrees Fahrenheit.

It is a non-colored organic gas with a low GWP. R-32 uses synthetic oil and requires less charge than other refrigerants. On the other hand, it is extremely poisonous. You must use it carefully to prevent breaking the HVAC components.

Because the R-410A absorbs more heat, the air conditioner can reduce the temperature more effectively. However, there are reports that because of R-410A’s high GWP, authorities will forbid its use. If the government decides to phase it out over the next few years, you had best be prepared with alternative refrigerant solutions.

Is It Possible To Use R-22 In A 407C Condenser?

It is a slightly flammable refrigerant with characteristics comparable to those of R-410A. Heat pumps and chillers can both benefit from the usage of R-454B refrigerant. Due to its lower GWP of 78%, it is also regarded as a straight replacement for R-410A.

R-407C: Will It Be Phased Out?

By 2024, several refrigerants, notably R-407C, are supposed to be phased out. High GWP may be the cause of the environment’s harm. However, there can be certain exceptions. Therefore, it’s wise to keep up with news like these.

Condenser Units: Are They Operable Without Refrigerant?

The quick answer is no, a condenser unit need refrigerant to function. Similar to an air conditioner, a condenser plays a crucial role in an HVAC system. It is linked to many motors, including the evaporator.

The primary function of the condenser in air conditioning is to absorb and turn the compressed gas into liquid. Condenser coils will then pass the liquid refrigerant through to enable the fan to release colder temperatures.

Therefore, utilizing a condenser without refrigerant will harm the appliance.

R-407C Charging Instructions

A refrigerant can be charged in two different methods. The first one is vapor charging, whereby you only permit a gas or refrigerant to circulate within the system. While charging with liquid, the compressor can be used with liquid refrigerant.

Liquid charging is advised for R-407C to avoid system failure since value charging could lead to subpar performance.

To prevent major harm, such as hazardous inhalation, it is best to let a professional charge the refrigerant. The procedures may vary based on the model of your equipment. You can, however, refer to the basic steps listed below:

  1. On top of the scale, place the refrigerant cylinder.
  2. As per the product’s usage instructions, connect the refrigerant cylinder to the charging valve.
  3. To get rid of the last of the air in the pipe, open the valve.
  4. Tighten the cap on the charging valve.
  5. Change the compressor’s setting to manual.
  6. Pump down the full charge to the condenser, then close the condenser exit valve.
  7. When the suction pressure is just above zero, gradually open the charging valve. By doing this, the compressor’s suction pipe won’t freeze.
  8. As the refrigerant flows through the system, keep an eye on it. To find out how much charge is in the system, just glance at the scale.
  9. As soon as the suction pressure rises above zero, shut off the charging valve.
  10. After stopping the compressor, shut the discharge valve.

How Often Should Refrigerant Be Recharged?

Is It Possible To Use R-22 In A 407C Condenser?

It’s a good idea to recharge the refrigerant once every two to five years. This is done to maintain consistently excellent performance. The recharge, however, can differ according to how frequently you use the HVAC system. If the unit runs for a long time, the refrigerant may run out too soon. However, with proper care and supervision, refrigerants can live longer.

How Can Leaking Refrigerant Be Found?

The HVAC system is designed to circulate refrigerant. As a result, refrigerant leaks are harmful to your health. Using a leak detecting tool, you may inspect your condenser unit for indications of a refrigerant leak.

Look for similar signals below.

Ineffective Cooling
Poor cooling performance will result from refrigerant leaks because there won’t be any substance to change the heated temperature of the air into cooler air. The unit will become useless if there is not enough refrigerant, which could also increase your electric bill.

Strange Smell
If the air smells so strangely, there may be a refrigerant leak. To prevent it from leaking harmful chemicals, you should rapidly turn the unit off. Also, depending on the brand and model of the machine, a warning light may flash to indicate a refrigerant leak.

Heating-Up Motors
Even though there is a refrigerant leak, the motors will still function. As a result of the motors vibrating against each other, they will overheat and seriously harm the device.

Cooling Coils
As a result of the condenser’s poor performance in the absence of refrigerant, you can also notice the coils freezing. As a result, the unit’s remaining refrigerant will freeze because there isn’t enough pressure to cause it to condense.

Water Spills
Ice that has amassed on coils will melt if there are refrigerant leaks. You may observe water pouring down the unit as a result. The refrigerant should be refilled by an HVAC professional because leaving the unit in that condition could result in an electrical shock.

Can Refrigerants Be Mixed?

As they have diverse chemical compositions, never combine various refrigerants. By doing this, the temperature will be unreliable, and even worse, the pressure will cause the HVAC system to malfunction.

However, using the evacuation procedure, it is possible to get rid of a refrigerant that was inadvertently mixed. The HVAC specialist will use this procedure to remove any circulating gas, moisture, and pressure from the system. It appears that the system will be refreshed by draining the chemical remnants of the refrigerant.

Knowledge of the evacuation procedure is necessary. You should delegate this task to a specialist.


We’re delighted you read the post since it taught us that while using an R-22 in place of an R-407C condenser would work, doing so is illegal for environmental reasons. Keep in mind to speak with a professional for the best HVAC system performance.

Is It Possible To Use R-22 In A 407C Condenser?

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Written by HVAC Contributor

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