Installation Operation Maintenance

InstallationMinimal installation watercontentThe water volume is an importantparameter because it allows astable chilled water temperatureand avoids short cycle operation ofthe compressors.Parameters which influence thewater temperature stability• Water loop volume• Load fluctuation• Number of capacity steps• Compressors rotation• Dead band• Minimum time between 2 startsof a compressorTable 9 gives the minimalinstallation water contentrecommended according to allthese parameters for both comfortand process cooling application.Water treatmentUntreated or insufficiently treatedwater, if used in this unit, maycause scale, slime or algae toaccumulate or cause erosion andcorrosion. As Trane does not knowthe components used in thehydraulic network and the quality ofthe water used, we recommend theservices of a qualified watertreatment specialist. The followingmaterials are used in Trane chillersheat exchangers:• Stainless steel plates AISI 316,1.4401 with copper brazing• Water piping: steel• Water connections: brassTrane will not accept any liability inregards of damage due to the useof untreated or improperly treatedwater or from the use of saline orbrackish water. If water treatment isrequired, contact your local Tranesales office.Table 9 - Minimal water contentProcess cooling ApplicationComfortApplication (1)4°C Dead band(2)3°C Dead band(3)CGWN - CCUN 205 300 l 1100 l 1700 lCGWN - CCUN 206 400 l 1500 l 2600 lCGWN - CCUN 207 500 l 1900 l 3500 lCGWN - CCUN 208 500 l 1800 l 3000 lCGWN - CCUN 209 500 l 1700 l 2700 lCGWN - CCUN 210 600 l 2100 l 3600 lCGWN - CCUN 211 600 l 2000 l 3300 l(1) Minimum water loop volume in order to prevent excessive compressor cycling(2) Minimum water loop volume to obtain maximum +/- 2°C chilled water temperature fluctuation vs. chilledwater set-point(3) Minimum water loop volume to obtain maximum +/- 1,5°C chilled water temperature fluctuation vs. chilledwater set-point14CG-SVX06A-E4