Most vapor recovery unit problems announce themselves through small changes well before they become failures, and the people best placed to notice those changes are the site staff who see the unit every day. A short checklist, split into daily, monthly and seasonal items, catches most of them without requiring specialist knowledge. The purpose is not to turn site staff into technicians, but to make sure the observations that matter are made and recorded consistently.
Why routine checks work better than periodic overhauls
A unit that is inspected on a fixed schedule can still fail between inspections. Routine observation works differently: the person who sees the unit daily is the first to notice a new noise, a higher discharge temperature or a longer run time after dispensing stops. Those observations are the earliest available signal that something has changed.
Daily checks
The daily list should be short enough to be completed in a few minutes and specific enough to be worth doing.
| Check | What to look for | Why it matters |
|---|---|---|
| Running sound | New or louder noise from the unit | Early sign of wear or cavitation |
| Run time after dispensing | Longer than usual to reach the stop condition | Points to falling capacity |
| Visible leaks | Damp patches, staining, odour near the unit | Small leaks become compliance issues |
| Indication and alarms | Any active alarm or unusual reading | Control issues escalate quickly |
| Condensate handling | Drainage working and receiver level normal | Liquid carryover damages equipment |
| Surrounding area | Obstruction of vents or airflow | Restricted airflow reduces performance |
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Monthly and seasonal items
Monthly checks look at things that change slowly: filter condition where fitted, the tightness of accessible connections, the condition of supports and fixings, and the accuracy of the readings the unit reports. Seasonal preparation looks at the conditions the unit is about to face, which in most locations means heat and humidity in summer and cold starts in winter. Both affect condenser duty and should be reflected in how the unit is set up.
Escalation and record keeping
- Record each daily check, including normal results, so trends are visible;
- Note any change in sound, run time or temperature alongside the date;
- Investigate anything that repeats for more than a few operating days;
- Escalate immediately if liquid carryover, alarms or leaks are found;
- Review the records monthly and look for slow changes rather than single events;
- Carry the observations into any service visit so the technician starts informed.
Frequently asked questions
Can site staff carry out this checklist without training?
The daily and monthly observation items are within reach of trained site staff because they are about noticing change, not about diagnosis. Any intervention inside the unit should remain with qualified personnel.
What is the single most useful daily observation?
Run time after dispensing stops. It is easy to observe, it changes gradually as capacity falls, and it is often the first measurable sign that the unit needs attention.
How should records be kept?
Simple and consistent is better than detailed and irregular. A dated line per day, with a short note when something differs from normal, gives a usable record for later service visits.
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