A vapour absorption chiller preventive maintenance schedule lists the checks and jobs done on the equipment at fixed intervals, how long each takes, and in what order of frequency, so problems are found before the vapour absorption chiller fails. This page gives the schedule used in the PlantOps360 task library for vapour absorption chiller (libr), which follows common industry practice for general-purpose equipment. It is also searched for as VAM, vapour absorption machine, LiBr chiller, absorption chiller.
The maker’s manual and your site safety procedures always come first where they differ. Intervals set by law differ by state.
Vapour absorption chiller preventive maintenance schedule and checklist
| How often | Task | Estimated time |
|---|---|---|
| Daily | Record chilled water, cooling water and steam or hot water temperatures and pressures; check solution level, vacuum and alarms | 10 min |
| Daily | Check for leaks, abnormal noise and the operation of the burner or steam control valve | 5 min |
| Weekly | Run the purge unit as per the OEM and record the vacuum; check the purge pump oil level | 20 min |
| Monthly | Check the solution and refrigerant pumps for noise, vibration and leaks; check the cooling water treatment and strainers | 45 min |
| Quarterly | Sample the LiBr solution for concentration, pH, inhibitor and contamination; check the purge pump oil and change it if needed | 90 min |
| Half-yearly | Test the safety trips: crystallisation protection, low refrigerant temperature and high generator temperature; check the controls and sensors | 150 min |
| Annual | Annual service: brush-clean absorber and condenser tubes, eddy current test of tubes as per the programme, vacuum leak test, replace purge pump oil and valve seals | 960 min |
Vapour absorption chiller maintenance frequency and yearly workload
At the estimated times, one vapour absorption chiller needs about 145 hours of preventive maintenance a year. The biggest single job is “Annual service: brush-clean absorber and condenser tubes, eddy current test of tubes as per the programme, vacuum leak test, replace purge pump oil and valve seals” at 960 minutes, done annual. Multiply by the number of units you have to see the workload for your plant.
| Frequency | Tasks | Time per round | Hours per year |
|---|---|---|---|
| Daily | 2 | 15 min | 91.3 h |
| Weekly | 1 | 20 min | 17.3 h |
| Monthly | 1 | 45 min | 9.0 h |
| Quarterly | 1 | 90 min | 6.0 h |
| Half-yearly | 1 | 150 min | 5.0 h |
| Annual | 1 | 960 min | 16.0 h |
What goes wrong on a vapour absorption chiller without preventive maintenance
- Tube fouling and corrosion
- Vacuum loss from air in-leakage
- Solution and pump faults
- Crystallisation from control or power faults
What to watch between services
- Temperatures and solution concentration
- Vacuum and purge frequency
- Pump and burner condition
Safety and statutory notes for vapour absorption chiller maintenance
Lithium bromide solution needs correct handling. Purge, inhibitor and tube cleaning follow the maker’s schedule.
Where a vapour absorption chiller preventive maintenance schedule is used
This equipment is used in the industries below. Each link opens the preventive maintenance schedule guide for that industry, and the maintenance software page where we have one.
- Preventive maintenance schedule for pharmaceutical plants · maintenance software for pharmaceutical · maintenance software for api bulk drugs
- Preventive maintenance schedule for chemical, fertiliser and petrochemical plants · maintenance software for chemical
- Preventive maintenance schedule for food, dairy and beverage plants · maintenance software for food processing · maintenance software for dairy
- Preventive maintenance schedule for agro, grain, edible oil and sugar plants · maintenance software for sugar and distilleries
- Preventive maintenance schedule for packaging, paper and printing plants · maintenance software for packaging · maintenance software for paper and pulp
- Preventive maintenance schedule for textile and garment mills · maintenance software for textile
- Preventive maintenance schedule for steel, foundry, forging and metal plants · maintenance software for steel and metals
- Preventive maintenance schedule for oil, gas and refinery facilities · maintenance software for oil and gas
- Preventive maintenance schedule for thermal and hydro power plants · maintenance software for power plants
- Preventive maintenance schedule for hospitals and healthcare facilities
- Preventive maintenance schedule for hotels, malls, offices and campuses
- Preventive maintenance schedule for data centres, it parks and telecom sites
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Browse the full list of equipment preventive maintenance schedules (317 types).
Run this vapour absorption chiller schedule in maintenance software
In preventive maintenance software, each row above becomes a recurring task on the asset with its checklist, time estimate and parts. Tasks can be triggered by calendar date, running hours, meter readings or production cycles, each completed task is recorded with the person and date, and a failed check can open a work order. For the method behind it, read the guide to the preventive maintenance schedule, or use the free generator to get a 12-month plan for your whole equipment list.
Build my preventive maintenance schedule (free Excel)
Frequently asked questions
How often should a vapour absorption chiller be serviced?
In our schedule a vapour absorption chiller has 7 tasks: 2 daily, 1 weekly, 1 monthly, 1 quarterly, 1 half-yearly, 1 annual. The biggest job is “Annual service: brush-clean absorber and condenser tubes, eddy current test of tubes as per the programme, vacuum leak test, replace purge pump oil and valve seals”, which is done annual. Always follow the maker’s manual where it gives a different interval.
What is included in vapour absorption chiller preventive maintenance?
It covers routine checks and jobs such as “Record chilled water, cooling water and steam or hot water temperatures and pressures…”, “Check for leaks, abnormal noise and the operation of the burner or steam control valve”, “Run the purge unit as per the OEM and record the vacuum; check the purge pump oil level”, up to the annual overhaul or inspection. The full list with times is in the table above.
How many hours of maintenance does a vapour absorption chiller need per year?
About 145 hours per unit per year at the estimated times in our library, including the daily checks done every day. Use it to plan workload, not as a benchmark.
Is there a free vapour absorption chiller maintenance checklist?
Yes. The table on this page is a ready checklist. The free preventive maintenance schedule generator turns it into a 12-month Excel schedule for your list of equipment, with monthly workload hours.