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Technicold Presents: The Commercial Operator’s Monthly HVAC Checklist

Downtime is never an option in the commercial marine industry.  But working with poorly functioning air conditioning in the summer months is unpleasant at best and a legitimate safety hazard at worst.  The marine HVAC experts at Technicold have the tips you need to make sure that your AC unit is ready for long summer nights.  Here are a few items that should be checked every month:   

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AIR FILTERS 

Check your air handler’s filters at least once a month. In some low traffic areas, it may be possible to extend the cleaning interval to every two months, but check them nonetheless. In high traffic areas, dusty environments such as laundry rooms, or when using Technicold Electrostatic Air Filters, it can’t hurt to check them on a more frequent basis.  Making sure that your AC system can breathe will make a world of difference when it comes to your on-board comfort.

COIL CHECK While you are checking your filters, take a look at the coils as well:

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-Remove light dust build up with a soft hand brush, or a vacuum cleaner with a brush attachment. 

-Use care not to bend or damage the fins on the coil. Do not move the brush across the coil surface as this can damage the coils. Use a linear up and down movement. 

-If you see bent fins, a fin comb provides an easy fix. You can purchase one from your local authorized Technicold Dealer

Excessive dirt build up on the coil may require chemical cleaning. This service should ONLY be performed by certified technicians.   Contact your dealer for more info. 

GAUGE PRESSURE 

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Many chilled water systems feature a circulation pressure gauge.  This gauge is usually located on the suction side of the circulation water pump. 

-The gauge pressure should be within the manufacturer’s specifications when the chillers are operating in cooling mode and the pump is off.

-For a Technicold unit the gauge should read 12-15 PSIG 

-If the gauge pressure is low then this is a good indication that there is a water leak in the piping, connections or pump shaft seal. Need help locating the source of a suspected leak? Click here for help locating the problem or call us for some guidance.

-Once the leak is located and repaired, fill the system back up to the design pressure. NOTE: The gauge pressure on a Technicold chilled-water system can reach up to 20 PSIG when the immersion heaters are in operation. 

CHILLERS: When shutting down the chillers for an extended period, you still need to make provisions to have them turned back on and operated for an hour each month. This will keep the internal parts of the compressors lubricated and prevent the parts and motors from “Mechanically Freezing.” Make the same provisions to operate the chillers in cooling when using immersion heat for an extended period.



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