What should you do if the refrigerant type on a unit's label is missing or unreadable?

What should you do if the refrigerant type on a unit's label is missing or unreadable?

• A. Vent the refrigerant to atmosphere
• B. Identify by color code
• C. Use a generic refrigerant until identified
• D. Recover the refrigerant and treat it as unknown; do not mix with other refrigerants until identified

Answer: (D)

When you don’t know the refrigerant type because the label is missing or unreadable, the safe and proper move is to recover the refrigerant and treat it as unknown, without mixing with other refrigerants. This protects you, the equipment, and the environment because venting is illegal and harmful, and you can’t rely on color codes or guessing. Color codes can be faded or inconsistent, and using a generic refrigerant can cause wrong oil, wrong pressures, and improper operation. Recover the refrigerant with an approved recovery system into a proper cylinder, label it as unknown, and identify the refrigerant later through documentation or proper testing before charging it back into the system.

When you don’t know the refrigerant type because the label is missing or unreadable, the safe and proper move is to recover the refrigerant and treat it as unknown, without mixing with other refrigerants. This protects you, the equipment, and the environment because venting is illegal and harmful, and you can’t rely on color codes or guessing. Color codes can be faded or inconsistent, and using a generic refrigerant can cause wrong oil, wrong pressures, and improper operation. Recover the refrigerant with an approved recovery system into a proper cylinder, label it as unknown, and identify the refrigerant later through documentation or proper testing before charging it back into the system.