MAINTENANCE AND REFURBISHMENT
A poorly maintained filter could add £50 in additional energy costs per filter per year. VSDs with HVAC- specific parameter settings can also identify when motor bearings and drive belts need replacing.
Keeping connections tight is important, as heat cycles and mechanical vibrations can loosen them, potentially causing arcing. This, in turn, leads to nuisance overvoltage faults, failure of input fuses, or damage to external components.
Whole life approach
If a failed VSD cannot be repaired economically then it may be time to replace it. However, this is not a decision that should be taken lightly and is certainly not one to rush.
This where whole life approach can really add value. Some VSDs may control fans that help heat a large atrium and thus may be almost constantly on in the winter, while others may be used to cool a seldom used meeting room. Assessing which VSDs are critical or which work hardest can give you a clearer picture of which ones need immediate attention. A whole life approach considers ongoing maintenance requirements as well as obsolescence, replacements and future upgrades for all VSDs in operation, as well as spares. This can help to take the surprise out of having to replace a VSD and allow potential failures to be anticipated.
Approaching maintenance strategically Implementing a comprehensive and ongoing review of the status of all VSDs
at a given time can be difficult and time consuming, but services like ABB’s Life Cycle Assessment (LCA) are available to make it easier. Customers register their VSDs in an online tool, which provides a comprehensive overview of the life cycle state and operating conditions of each drive for better decision making and maintenance scheduling. Alternatively, this can be done with a site visit from an ABB engineer or one of its Value Provider partners, who can make the assessment for you.
The LCA tool logs age, location, criticality, operating environment, service history and part replacement history, allowing tailored maintenance for each VSD. It also flags any critical or at risk VSDs and those which need servicing or could be replaced or upgraded. This helps avoid unplanned downtime and can be used to protect maintenance budgets and manage costs across multiple facilities. It can also help companies to modernise their operations by providing a schedule for replacing and upgrading equipment that might be approaching obsolescence.
BSEE
VSDs play a major role in ensuring the eciency of HVAC systems
VSDs can play a major role in maintaining the efficiency of a HVAC system. If their own maintenance and operation is looked after, VSDs can provide a valuable contribution to maintaining the comfort of a building’s users for many years.
Ultimately, it has never been easier to adopt a whole life approach to drive and motor maintenance management, helping to cut costs, reduce failures and reach the net zero carbon targets to help secure a greener future.
Read the latest at:
www.bsee.co.uk
BUILDING SERVICES & ENVIRONMENTAL ENGINEER MARCH 2021 31
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