Refrigeration Technician – Marine Chillers and Compressors

The Mid-Level Refrigeration Technician – Marine Chillers and Compressors is responsible for the maintenance, repair, and commissioning of marine refrigeration and cooling systems. This includes hands-on troubleshooting and servicing of chillers, compressors, evaporators, condensers, and associated refrigerant and control systems. The technician ensures reliable operation of HVAC cooling systems in compliance with class, safety, and environmental regulations.

Key Responsibilities:

• • Install, maintain, and troubleshoot marine chillers (centrifugal, screw, scroll) and compressor units (reciprocating, rotary, screw) used in HVAC and refrigeration systems on vessels and platforms.

  • Perform refrigerant recovery, leak detection, recharging, oil analysis, filter replacement, and pressure/temperature testing.

  • Conduct system diagnostics using gauges, sensors, multimeters, and refrigerant analyzers to identify faults or inefficiencies.

  • Carry out preventive maintenance schedules, system overhauls, and performance tuning as per OEM and project specifications.

  • Inspect and maintain evaporators, expansion valves, liquid receivers, condensers, solenoid valves, and thermostatic controls.

  • Monitor system performance, document operational readings, and adjust controls to maintain optimal cooling and reliability.

  • Assist in pre-commissioning, commissioning, and post-repair testing of shipboard refrigeration and HVAC systems.

  • Follow environmental protocols for refrigerant handling (e.g., R-134a, R-407C, R-404A) and ensure compliance with MARPOL Annex VI.

  • Prepare maintenance reports, checklists, and equipment condition assessments.

  • Support HVAC automation and BMS team for interface with refrigeration systems and control logic.

Key Focus Areas:

1. Technical Execution
   – Independently perform refrigeration system maintenance and fault rectification onboard marine assets.

2. System Integrity and Performance
   – Ensure systems operate within performance limits with zero refrigerant leakage or cooling loss.

3. Compliance and Safety
   – Adhere to class, safety, and environmental standards for refrigeration systems and pressurized components.

4. Documentation and Team Support
   – Accurately document service activities and assist junior technicians in field operations.

Qualifications and Skills:

• • Diploma/Certificate in Marine Engineering, HVAC/Refrigeration Technology, or Mechanical Trades.

  • 3–5 years of experience in refrigeration service, including at least 2 years in marine or offshore environments.

  • Proficient in the refrigeration cycle, chillers and compressor operation, refrigerant characteristics, and control systems.

  • Skilled in using leak detectors, vacuum pumps, refrigerant scales, digital gauges, and recovery machines.

  • Ability to interpret HVAC P&IDs, wiring diagrams, technical manuals, and vessel system layouts.

  • Understanding of marine regulations, classification standards (ABS, DNV, USCG), and HVAC codes (ASHRAE, IMO).

  • Strong communication skills, documentation abilities, and capability to work in confined spaces and offshore environments.

Preferred:

• • EPA 608 or F-Gas certification (or equivalent for refrigerant handling).

  • Familiarity with PLC/BMS control integration and HVAC monitoring systems.

  • STCW or BOSIET certification and experience on vessels such as LNG carriers, cruise ships, FPSOs, or naval vessels.

  • Awareness of energy-efficient refrigeration practices and sustainable refrigerant technologies.