When refilling synthetic oil for lubricating parts of a medium back pressure (MBP) hermetic reciprocating compressor on a condensing unit of a walk-in freezer, you typically use the suction port to introduce the oil into the system.
Here's a step-by-step guide to refilling synthetic oil for a hermetic reciprocating compressor:
- Ensure that the condensing unit is powered off and disconnected from the electrical supply.
- Locate the suction and discharge ports on the compressor. The suction port is typically larger in size compared to the discharge port.
- The suction port is where the oil is typically added. It serves as the entry point for the lubricant to flow into the compressor. It is usually connected to the low side of the refrigeration system.
- Remove the cap or plug from the suction port. Be cautious not to introduce any debris or contaminants into the system.
- Use an appropriate oil charging device, such as an oil injector or oil can, to introduce the synthetic oil into the compressor. Make sure to use the recommended type and amount of oil specified by the manufacturer.
- Slowly inject the oil into the suction port. It is essential to avoid overfilling, as it can lead to poor compressor performance or damage.
- After adding the oil, replace and tighten the cap or plug securely on the suction port to prevent any leaks.
- Once the oil has been added, you can proceed with other necessary maintenance or service tasks, such as checking refrigerant levels, cleaning coils, or replacing filters.
Remember, it is crucial to follow the manufacturer's recommendations and guidelines for oil type, quantity, and any specific instructions for your particular compressor model. Additionally, if you are uncertain or unfamiliar with the process, it is advisable to consult a qualified refrigeration technician for assistance.