Refrigerant charging in Quwaizah

A sealed refrigerant circuit does not consume refrigerant. A low charge means there is a leak somewhere. Adding refrigerant without finding and repairing that leak brings the same fault back quickly and can damage the compressor. The correct sequence is always to locate the leak, repair it, pull a vacuum on the circuit, and then charge to the type and quantity shown on the unit's nameplate.

The most common points are expansion fittings and restrictions on the liquid line, flare joints at the evaporator and condenser, and service valves where the rubber seals have aged. In commercial refrigeration, old copper pipe welds weakened by continuous compressor vibration are also a frequent source. The exact location is found during the site inspection.

Yes. Every unit is designed for a specific refrigerant type with defined operating pressures and heat transfer properties. Using a different type changes those pressures and can either overload the compressor or reduce cooling output. For this reason the unit is always charged with the exact type shown on its nameplate and no substitute is used.

Yes, they differ in several ways. Commercial refrigeration units operate at pressures and with refrigerant types distinct from those in air conditioners, and their target temperatures are much lower. The pipe circuits are also longer and often include multiple distributors and valves that require careful inspection before vacuuming and charging. The nature of each circuit determines the procedure.

The core steps are the same: locate the leak, repair it, vacuum the circuit, then charge to the nameplate type. Commercial refrigeration units sometimes have additional valves and components that require a different inspection approach. What each unit needs is determined by the technician on site after pressure readings and a circuit check.

Display fridges operate at higher pressure than standard splits, so a small leak appears faster. We locate the leak with an electronic detector and fix the weak point before recharging.

Dust and smoke reduce the outdoor unit's efficiency, raising circuit pressure. We clean outdoor units from dirt before checking and measuring refrigerant to ensure accurate readings.

We inspect each system separately using an electronic detector and pressure gauge. We identify the leak in each circuit and repair and charge each one per its type and designated pressure.

Yes, commercial fridges may use R404A or R507, while splits typically use R410A or R32. We check the refrigerant type on the nameplate before charging and use only the original type.