Refrigerant Circuit, General Precautions: Notes
- Follow the instructions for the workplace. They should be displayed in the workplace.
- Ensure absolute cleanliness when working.
- Wear work clothing, safety goggles and gloves when working with refrigerant and nitrogen.
- Turn on the exhaust gas ventilation system
- Only use the A/C Service Station to discharge refrigerant circuit, and then open the threaded connections and replace any faulty components.
- Use caps to seal off any opened assemblies and hoses to prevent moisture and dirt from getting in.
- Only use tools and materials designated for refrigerant R134a.
- Be sure to close the container to prevent the refrigerant oil from absorbing moisture from the air.
-- Refrigerant Circuit, Flushing with Compressed Air and Nitrogen. Refer to REFRIGERANT CIRCUIT, CLEANING WITH COMPRESSED AIR AND NITROGEN .
-- Flushing refrigerant circuit with R134a refrigerant. Refer to REFRIGERANT CIRCUIT, FLUSHING WITH R134A REFRIGERANT .
On vehicles with A/C compressor without magnetic clutch:
The engine may only be started when the refrigerant circuit is installed correctly. For example; if the refrigerant pipes are not connected to A/C compressor, when the engine is running the A/C compressor may heat up (via internal heat generation) so much that the A/C compressor will be damaged.
A/C Compressor Regulator Valve -N280- is not activated when the refrigerant circuit is empty and the A/C compressor idles with the engine.
If it is necessary to start the engine with a discharged refrigerant circuit:
The refrigerant circuit must be fully assembled.
At least a quarter of the prescribed refrigerant oil must be in the A/C compressor.
Do not let the engine speed go above 2, 000 RPM.
If the engine is ran less than 10 minutes.