HVAC Procedure and Performance Guide

TASK: Install hard-start kit on hermetic compressor

Training for this procedure can be found in these courses:

                         131 – Oil Heat l  and  161 – Boilers l


Hard-start kit must be installed according to manufacturer’s specifications.  Components must be securely mounted on compressor, wiring must be mechanically secure and electrical continuity must be established.  Hard-start kit must provide extra starting torque for compressor motor as required.  Applicable safety procedures must be followed.


  1. Review job order and manufacturer’s specifications.
  2. Determine type and electrical requirements of hard-start kit required for compressor.
  3. Collect tools, equipment and materials.
  4. Put on safety and protective equipment and apparel.
  5. Disconnect electrical power.
  6. Verify that hard-start kit is suitable for application.
  7. Mount relay and capacitor and connect wiring according to manufacturer’s specifications.
  8. Start system, monitor operation and verify that compressor starts and performs correctly.
  9. If equipment does not operate to specifications, troubleshoot and make required adjustments and repairs.
  10. Leave equipment in required operating status.
  11. Remove safety and protective equipment and apparel.
  12. Gather tools, equipment and leftover materials and leave work site clean.