Failure Diagnosis - Lennox CSC Installation, Operating And Maintenance Manual

4.- MAINTENANCE
4.2.- CORRECTIVE MAINTENANCE
PRECAUTIONS TO BE TAKEN WHEN USING OF R-410A Refrigerant:
R-410A refrigerant is used in the unit; the following standard precautions for this gas should therefore be taken:
- The Vacuum Pump must have a Check Valve or Solenoid Valve fi tted.
- Pressure Gauges and Hoses for exclusive use with R-410A Refrigerant should be used.
- Charging should be carried out in the Liquid Phase.
- Always use scales to weigh-in charge
- Use the Leak Detector exclusive for R-410A Refrigerant.
- Do not use mineral oil, only synthetic oil to ream, expand or make connections.
- Keep pipes wrapped before using them and be very thorough about any possible dirt (dust, fi lings, burrs, etc.).
- When there is a leak, collect what remains of the charge, create a vacuum in the unit and completely recharge with new R-410A Refrigerant.
- Brazing should always be carried out in a nitrogen atmosphere.
- Reamers should always be well sharpened.
- All the components derived from the recycling of the unit should be managed according local legislation, and have to be classifi ed
and separated while dealt by authorized waste manager or be left in local waste facilities.
- Refrigerant fl uids, electronic boards, heat exchangers and the oil extracted from the refrigerant circuit, as well as the oil recipients
used must be recycled as hazardous waste according the local normative through an authorized waste manager or be left in local
waste facilities. The rest of the components considered as non-hazardous wastes must be recycled according to the corresponding
norms.
- At the end of its life, the equipment should be recycled in local waste facilities or by an authorized waste manager.
• 29 • Installation, Operation and Maintenance manual • CSC/CSH-MIL153E-1217-05/2018