Temperature Issues | Compressor Failure
A customer called MSC with a problem he was having at a temperature-controlled satellite facility where indoor temperatures were rising 6°F to 7°F above set point of 68°F on hot design days. The problem worsened significantly when outdoor air temperatures went into the 90s.
An MSC technician dispatched to diagnose the problem quickly determined that one of four 4-ton digital scroll compressors on the 100% outside air system had failed, and as a result it was running at 75% capacity. A new compressor was ordered, and MSC turned their attention to the cause of failure, which was determined to be an internal motor burnout due to a manufacturing defect. The new compressor, contactor and dryer were received at the site within 48 hours and promptly installed. All four stages of cooling were restored to 100% capacity on design days.
MSC also verified and calibrated the air handling unit discharge temperature sensor and space temperature sensors, as they were off by 1°F to 2°F. Several data loggers were also placed throughout the space for ten days, then analyzed to make sure space temperatures had returned to design conditions of 68°F ±2°F. Technicians also replaced OA filters, flushed out condensate lines, and performed a cooling coil cleaning to maximize heat transfer.
About MSC - The Go To Guys
We are a service sub-specialist in the technical intricacies of HVAC, process cooling, and building automation systems in commercial, industrial, and institutional environments. MSC is recognized as the leading industry expert in solving elusive problems and attaining peak performance from clients & mechanical equipment and overall systems.
Located in northern New Jersey, MSC is the only specialized contractor of our kind in the Northeast and Mid-Atlantic regions. We are MSCA STAR-qualified, NEBB-certified, fully-licensed in electrical, plumbing and HVAC, and our engineers and technicians are the most knowledgeable in our field.
MSC - Mechanical Service Corp.
41 South Jefferson Road
Whippany, NJ 07981
973-884-5000
http://www.mscnj.com
