HVAC Procedure and Performance Guide

Replace condenser or outdoor coil

Training for this procedure can be found in these courses:

                         131 – Oil Heat l  and  161 – Boilers l


Condenser or outdoor coil must be replaced according to manufacturer’s specifications.  Coil must be securely installed in housing, refrigerant and condensate lines must be connected and system must perform according to specifications.  Applicable safety procedures must be followed.  EPA regulations on discharge of refrigerants to atmosphere must be satisfied.


  1. Review job order and manufacturer’s specifications.
  2. Determine condenser coil size, number of tubes, number of rows, fin spacing and coil configuration.
  3. Collect tools, equipment and materials.
  4. Put on safety and protective equipment and apparel.
  5. Disconnect electrical power to equipment.
  6. Remove access cover(s) and safety guard(s).
  7. Remove fans or fan blades as required.
  8. Remove defrost controls (temperature switches, air switches, etc.)
  9. Connect refrigeration manifold gage set and bleed pressure off system.  (Note:  Recover refrigerant if required by EPA regulations).
  10. Cut and remove refrigerant tubing sections at coil.
  11. Remove coil from housing.
  12. Verify that new coil is suitable replacement.
  13. Make required modifications to housing.
  14. Position and secure coil in housing.
  15. Nitrogen purge refrigerant tubing and make coil connections.  (Note:  Procedure will vary according to type of connection used).
  16. Check system for leaks and make necessary repairs.
  17. Reinstall defrost heater and controls.
  18. Reinstall fans or blades.
  19. Evacuate and recharge system.
  20. Reconnect electrical power.
  21. Place system in operation, check performance and make necessary adjustments.
  22. Replace access cover(s) and safety guard(s).
  23. Leave system in required operating status.
  24. Remove safety and protective equipment and apparel.
  25. Gather tools, equipment and leftover materials, and leave work site clean.