Danfoss TTS300

4.7 Interstage Pipe - TTH/TGH
TheInterstagePipeconnectsthefirst-stageimpelleroutputtothesecond-stageimpellerinputoftheHighLift
compressor.Itisalsotheconnectionpointfortheeconomizerport.
Figure 4-37 Interstage Pipe
4.7.1 Interstage Pipe Removal and Installation

4.7.1.1 Interstage Pipe Removal
1. Isolatecompressorpower.
2. Isolatethecompressorandrecovertherefrigerantaccordingtoindustrystandards.RefertoSection3.1
RefrigerantContainmentonpage41.
3. DisconnecttheInterstagePressure/Temperature(P/T)Sensorharness.RefertoFigure4-38Interstage
PipeRemovalforthisandthefollowingsteps.
4. DisconnectthepipeconnectedtotheEconomizerport.
5. Removethefour(4)M10x40fasteners(2perside)andremovetheInterstagePipe.
6. RemovetheO-ringsfromtheflanges.
Figure 4-38 Interstage Pipe Removal

4.7.1.2 Interstage Pipe Installation
1. Cleanallmatingsurfaces.
2. Obtaintwo(2)newO-ringsfortheInterstagePipeandlubricatethemwithO-lube.
3. InstallthenewO-ringsintothegroovesoftheHousingExtensionandtheSecond-StageSuction
Housing.RefertoFigure4-38InterstagePipeRemovalforthisandthefollowingsteps.
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