Chiller Laser Alignment and Follow-On Condition Monitoring

Chiller Laser Alignment and Follow-On Condition Monitoring

Reliable recommissioning starts before an asset goes back into service. When AVT Reliability Ireland was asked to support a refurbished chiller at a pharmaceutical site, the first priority was to make sure the motor and compressor were correctly aligned before the unit returned to normal operation.

Precision shaft alignment provides a controlled starting point for rotating equipment. If the shafts are not correctly aligned, the machine can operate with increased vibration and mechanical stress, contributing to premature wear in bearings, seals and couplings. On critical process equipment, those small installation errors can become reliability problems later.

Getting the mechanical condition right first

The chiller had been refurbished before reinstallation, so alignment between the motor and compressor needed to be verified rather than assumed.

AVT engineers used laser shaft alignment to measure the relationship between the two shafts, make the required corrections and verify the final position. Laser systems provide accurate, repeatable measurements and live feedback during adjustment, while the final results can be documented for the site maintenance record.

The principle is straightforward: condition monitoring is most valuable when the asset begins service in a known mechanical condition. Monitoring a poorly aligned machine may show the symptoms, but correcting the alignment first removes an avoidable source of vibration from the outset.

Why alignment matters on a chiller

A motor and compressor operate as a connected machine train. Misalignment at the coupling can introduce additional forces into both machines and affect the components supporting them.

Potential consequences include higher vibration, accelerated coupling wear and increased loading on bearings and seals. Over time, this can shorten component life and increase the likelihood of repeat maintenance.

Precision alignment does not eliminate every future fault, but it removes one known mechanical risk and establishes a cleaner baseline for ongoing condition monitoring.

From recommissioning to ongoing monitoring

The alignment work formed part of a wider reliability strategy rather than a one-off intervention.

Following recommissioning, Machine Sentry® MSF-2 sensors were planned for installation on the chiller so its condition could be monitored as part of the site’s existing Machine Sentry programme. Fixed wireless monitoring allows vibration and temperature data to be collected routinely without relying entirely on manual measurements.

That creates continuity between the installation work and the way the asset is managed afterwards. The chiller begins service with verified shaft alignment, then ongoing condition data can be used to identify changes from that known baseline.

If vibration increases later, the maintenance team has more context for deciding whether the change points towards alignment, bearing condition, operating load or another developing issue.

Using monitoring to protect the work already completed

Condition monitoring is sometimes treated as a separate activity from mechanical maintenance. In practice, the two are strongest when they support each other.

Alignment establishes the correct mechanical relationship between coupled assets. Monitoring then helps show whether that condition remains stable as the machine operates.

For a refurbished asset, this combination is particularly useful. The engineering work carried out during recommissioning is not simply completed and forgotten. Changes in vibration or temperature can be trended over time, giving the site an opportunity to investigate developing problems before they become disruptive failures.

The same principle was demonstrated on another pharmaceutical tank farm pump monitored by AVT Reliability. Condition data identified elevated vibration and misalignment, allowing alignment and coupling work to be completed during planned maintenance before the problem developed further.

Building reliability into the asset lifecycle

The chiller project is a good example of how reliability work can be connected across different stages of an asset’s life.

Precision alignment supports correct installation. Machine Sentry fixed monitoring then provides ongoing visibility once the asset is operating. Together, they give the maintenance team both a stronger starting condition and better information for protecting it.

For critical rotating equipment, that is often more useful than treating installation, alignment and condition monitoring as separate jobs. The aim is to create a continuous reliability process from recommissioning through normal operation, with measured evidence supporting maintenance decisions throughout.