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Charging Refrigeration System
Charging a refrigeration system means adding or replacing refrigerant in a system. Refrigerants are never used up. It either leaks out or is contaminated by: water, acid, or non-condensables. Need a price to recharge your refrigerator with a refrigerant freon R134a or R600a? MAAR24 provide multipoint sealed system diagnoses and fix refrigerators that are not cooling enough by recharging the refrigerant.
Usually, this issue begins when your fresh food compartment or freezer section blows warm air or the compressor makes a humming noise. Slow leaks can cause refrigerant levels to drop over time, requiring a system recharge or replacing some refrigerator parts.
Let us quickly and easily give you a recharge quote for your specific fridge and type of compressor. Please fill up our contact form and provide us with your make and model number, a brief description of the problem and any other details available.
Our trained technicians are experts in all types of refrigerator servicing and have years of experience in repair, installation and maintenance. We’ll serve you and your property with respect and attention for the safety and comfort you deserve fridge repair.
What is the system charging methods?
- Weighing: using scales to check the amount added
- Measuring: using a dial-a-charge cylinder
- Superheat and Subcooling: most accurate; combine with weighing in the charge; allow the system to run for 10 min before taking readings
- Sight Glass: never used to check the charge, not accurate and varies based on the system conditions
- Amperage or wattage: not accurate, do not use unless you have no other options
States of Refrigerant Charging
A refrigerant can be charged as a:
- Vapour entails taking vapour refrigerant out of a refrigerant drum and putting it into the low side of the system. If the system is not operating, vapour can be added to both the low and high sides of the system until the pressures equalize. The main advantage is that it is the easiest way of adding refrigerant to top off a running system. However, some disadvantages exist: a slow process for adding large quantities, high drum pressures can force oil out of the compressor, and blended refrigerants may fractionate.
- Liquid charging entails adding a refrigerant in the liquid state into a system. In a non-operating system, you can add liquid refrigerant through the king valve on the receiver; in an operating system, technicians can front-seat the king valve (charging through the low side). Liquid charging is the fast and most convenient method. If we talk about disadvantages, you should keep in mind that the system must be turned off, and the system can easily overcharge.
The Main Troubleshooting the Customer May Face
- A low charge can lead to insufficient cooling (it means low capacity), long running time and high operating costs; as a result, evaporator icing up, superheating higher than normal, compressor temperature will be higher as well, and low wattage.
- Overcharging will cause high suction pressure and high discharge pressure, compressor sweating all over, and as a result, flooding (liquid in a compressor) and high wattage.
