Why handling practice matters
- Venting refrigerant to the air releases high-GWP gases and wastes money.
- Topping up without fixing leaks guarantees the next breakdown.
- Moisture or air left in a system forms acids and ice, killing compressors.
- Over- or under-charging raises energy use and can damage the compressor.
- Flammable refrigerants such as R290 need specific precautions; CO2 needs high-pressure skills.
What a good service job includes
| Step | Good practice | Why |
|---|---|---|
| Diagnose | Measure pressures, temperatures and currents before adding anything | Avoids treating every problem as 'low gas' |
| Find leaks | Use electronic detectors, bubble tests or nitrogen pressure tests | Fixes the cause, not the symptom |
| Recover | Remove refrigerant into a proper recovery cylinder | No venting; refrigerant can be recycled or reclaimed |
| Repair | Braze under nitrogen flow; replace filter drier | Prevents oxide scale and moisture |
| Evacuate | Pull a deep vacuum and check it holds | Removes moisture and air |
| Charge | Charge by weight to the rating-plate amount | Correct performance and efficiency |
| Record | Note refrigerant type, amount added and work done | Tracks leaks over time |
Recovery, recycling and reclamation
Recovery means removing refrigerant from a system into a cylinder rather than releasing it. Recycling cleans it for reuse, often on site. Reclamation reprocesses it to a purity specification at a specialised facility. Each keeps refrigerant out of the atmosphere and reduces the need for new production, which matters more as HFC supplies are phased down.
Mixed refrigerants cannot easily be reused, so good technicians use separate, labelled cylinders for each type.
Recovery also protects the technician and your premises. Refrigerant released in a closed kitchen or storeroom displaces air, and with flammable refrigerants it creates a fire risk. Ask to see the recovery machine and cylinder on the job; a technician who has neither is almost certainly venting.
The regulatory background
In India, ozone-depleting substances such as HCFCs are regulated under the Ozone Depleting Substances (Regulation and Control) Rules, 2000, and the government has indicated that the HFC phase-down under the Kigali Amendment will be implemented through amendments to that framework. The India Cooling Action Plan set a target of training and certifying 100,000 servicing technicians by 2022–23, in synergy with the Skill India Mission. Check with your industry association or supplier for the training and certification schemes currently available in your region.
New refrigerants need new skills
- Hydrocarbons (R290, R600a): flammable-gas detectors, spark-free tools, ventilation, no brazing until purged.
- CO2 (R744): very high pressures, specific gauges, hoses and relief practices.
- A2L blends: mildly flammable; follow the manufacturer's procedures.
- Blends with temperature glide: charge as liquid where specified so the composition stays correct.
How owners can check a service provider
- Ask what training technicians have had, especially for hydrocarbons if your cabinets use R290 or R600a.
- Ask whether they carry recovery equipment and cylinders, and what they do with recovered gas.
- Ask for a written report after each visit: what was found, what was done, how much refrigerant was added.
- Be wary of anyone who proposes 'gas filling' without looking for a leak.
- Keep a refrigerant log for each unit and review it once a year.
Frequently asked questions
- My technician says the fridge just needs gas every summer. Is that normal?
- No. A sealed refrigeration system should not lose refrigerant. Needing regular top-ups means there is a leak that should be found and repaired.
- What should a service report include?
- The unit and its refrigerant type, the fault found, the work done, parts replaced, whether refrigerant was recovered, how much refrigerant was added by weight, and the pressures and temperatures after the repair. Keep reports together for each unit.
- Should I keep spare refrigerant cylinders at my premises?
- Generally no. Cylinders are pressurised and some refrigerants are flammable. Leave refrigerant supply and storage to your service provider, who should transport and store cylinders correctly.
- Is it expensive to recover refrigerant instead of venting it?
- It takes a little more time and equipment, but it protects the environment, avoids wasted gas and is part of responsible service. With HFC supplies being phased down, recovered refrigerant also has value.
