HRAI ODP Refrigerant Handling study plan

HRAI ODP Refrigerant Handling · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

ODP/ODS Refrigerant Handling

Define ozone depletion potential and explain how chlorine and bromine loading in a molecule drives ODP values.
Classify the main ODS families (CFCs, HCFCs, halons, carbon tetrachloride, methyl bromide, methyl chloroform) and state which refrigerant groups fall in each.
Explain the Montreal Protocol phase-out schedule logic and how it applies to refrigerant selection and service practice.
Map the ODP and GWP relationship so you can explain why a low-ODP refrigerant is not automatically low-GWP.

A one-page ODS classification table listing at least 10 substances with family, typical use, and relative ODP ranking, self-quizzed to 90% recall.

Week 2

Describe refrigerant handling regulations for ODS and their substitutes, including technician certification requirements and recordkeeping duties.
Explain venting prohibitions and identify the narrow exceptions where release is permitted.
Identify required service practices for leak detection, evacuation, and recovery before opening a system.
Distinguish recovery, recycling, and reclamation and state where each is acceptable.

A written compliance checklist of at least 15 handling rules, each with a one-line rationale, scored against a self-made answer key.

Week 3

Select recovery equipment and cylinders appropriate to the refrigerant type, including safety classifications and cylinder color/connection conventions.
Perform recovery calculations for small appliances versus larger systems and explain the required evacuation levels.
Describe safe cylinder handling: filling limits, hydrostatic testing, and avoiding overfill and liquid slugging.
Explain refrigerant identification and why mixing refrigerants is prohibited.

A worked recovery scenario packet with 5 problems (evacuation target, cylinder fill limit, recovery method choice) solved and checked.

Week 4

Trace the leak-detection workflow from initial inspection through verification of repair and follow-up leak checks.
Apply the leak-rate thresholds and repair timelines that govern ODS-containing systems.
Explain the difference between leak-rate calculations for commercial refrigeration versus comfort cooling.
Document a leak repair record with all required fields.

A completed mock leak-repair record for two systems, with leak-rate math shown and verified against your own rubric.

Week 5

Describe safe refrigerant storage, transport, and disposal requirements, including cylinder labeling and segregation.
Explain what happens to recovered refrigerant at end of life and when destruction is required.
Identify hazards of ODS refrigerants: asphyxiation, frostbite, decomposition products, and flammability of substitutes.
Apply personal protective equipment and ventilation decisions to three handling scenarios.

A hazard-and-controls matrix covering 8 scenarios, each with hazard, control, and PPE, reviewed for gaps.

Week 6

Integrate ODP, GWP, and regulatory knowledge into refrigerant retrofit and replacement decisions.
Explain the requirements for retrofitting a system from an ODS refrigerant to a substitute, including oil and component changes.
Compare reclaim versus retrofit versus replacement on cost, compliance, and environmental grounds.
Identify common exam traps involving ODS terminology and substitute refrigerants.

A decision brief recommending retrofit, reclaim, or replace for three hypothetical systems, with justification tied to regulation and ODP/GWP data.

Week 7

Practice timed mixed-topic question sets covering the full ODP/ODS handling domain.
Diagnose recurring error patterns and re-study the two weakest subtopics.
Rehearse calculation items (evacuation levels, leak rates, cylinder fill) under time pressure.
Build a personal one-page reference sheet of facts you keep missing.

Three timed practice sets of 25 questions each, with a score log and error analysis showing improvement across attempts.

Week 8

Run a full-length timed mock exam and score it against the domain weighting.
Review every missed item and confirm the underlying fact is now solid.
Recite the core regulatory thresholds, recovery targets, and handling rules from memory.
Finalize exam-day logistics and a last-24-hour review routine.

A full mock exam scored at or above your target pass mark, plus a final gap list with zero unresolved items.

Week 2: Score at least 85% on a self-made 20-question quiz covering ODS classification and handling rules.

Week 4: Complete the recovery and leak-repair scenario packet with all calculations verified and no unresolved errors.

Week 6: Explain retrofit versus reclaim versus replace decisions correctly for all three brief scenarios without notes.

Week 8: Achieve the target pass mark on a full-length timed mock exam and clear every item on the final gap list.