Refilling the system with refrigerant
- Make
- Alfa Romeo
- Model
- 155 Factory Service Manual
- Year
- 1992–1998
- Section
- Discharging the refrigerant › Refilling the system with refrigerant
CAUTION The safety rules given in the Introduction to the maintenance Instructions should be observed at all times.
Freon is not a dangerous product but it can become toxic in the presence of naked flame. For this reason it is advisable to drain the Freon circuit away from flames and if possible, in a ventilated area.
Avoid exposing the skin to evaporating Freon for long periods. The gas being discharged at environmental temperature and pressure expands rapidly reaching temperatures of -29.8 °C (-21.7 °F) and may cause "burning" due to the excessively low temperature.
Protect the eyes from contact with the refrigerant as the excessive and instant low temperature may cause serious injury.
- Unscrew and remove the cap from the valve on the low pressure hose.
CAUTION Discharging Freon into the atmosphere is harmful to the environment. Collect the Freon in a specific collection system.
- Attach the special tube (fitted with a needle connection) to the valve and discharge the system (RESPECTING THE CURRENT LAWS).
REFILLING THE SYSTEM WITH REFRIGERANT
CAUTION The safety rules given in the introduction to the maintenance operations should be followed at all times. The following should be particularly noted:
Freon is not harmful to either vehicles or people, however, as it is stored under pressure it is susceptible to physical transformation which can render it dangerous if not correctly handled. For this reason it is vital that the information given below is followed at all times. The fluid is normally stored in metal cylinders. Never expose the cylinders to the sun for extended periods as the temperature will cause an increase in pressure which could exceed the safety limits.
The transvasing of the metal cylinder to the loading station during cold weather may prove difficult due to the low pressure in the cylinder. In this situation leave the cylinder to stand in a heated area, not above 35 °C (95 °F), for about twenty minutes. Never heat the cylinder using a naked flame. Never leave the cylinder of the loading station completely full for long periods.
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