Roof Top Chiller System

For shut down the chiller in winter , you must pump down chiller ( make ashunt on low pressure cut out , close compressor discharge valve , run the compressore untill suction pressure gauge read under the atmospheric pressure and then close suction valve . after drain the net work and dry it by compressed air.

by the above procedure you can leave your chiller during winter with out operation any part .

We run our glycol pumps all winter to circulate glycol for three reasons. The most obvious is that we need cooling using our air-cooled dry coolers; the chillers are shut down during this period. The second is that glycol that's moving will prevent local corrosion due to the anti-oxidants being depleted in 4 months of non-use. The third is that moving glycol is less likely to freeze than standing glycol (we're careful to maintain a high enough glycol concentration at all times, anyway).