Trane RAUJ CAUJ 20 to 120 Tons Installation Manual

SAFETY WARNINGOnly qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating,

4 SS-APG007-ENLine Sizing, Routing, and Component SelectionFigure 4 illustrates an example of an RAUJ split-system component arrangement. Use it to d

SS-APG007-EN 5Line Sizing, Routing, and Component Selectionvalve discharges to the condenser to prevent excessive pressures from developing in the liq

6 SS-APG007-ENLine Sizing, Routing, and Component SelectionFor improved modulation, choose expansion valves with balanced port construction and exter

SS-APG007-EN 7Line Sizing, Routing, and Component SelectionComponentsInstalling the suction line requires field installation of these components: a fi

8 SS-APG007-ENExpansion ValvesExpansion valves meter refrigerant into the evaporator under controlled conditions. If there is too much refrigerant, t

SS-APG007-EN 9ControlsThe RAUJ unit is available with different control options depending on unit tonnage. These control options include VAV operation

10 SS-APG007-ENHot Gas BypassMany years ago, hot gas bypass (HGBP) was successfully added to HVAC systems to correct a number of operational problems

SS-APG007-EN 11Remodel, Retrofit, or ReplacementInevitably, older condensing units and evaporator systems will need to be replaced or retrofitted. Due

12 SS-APG007-ENRemodel, Retrofit, or ReplacementAll Codes take precedence over anything written here. NOTICE: Compressor Damage! POE oil is hygroscop

SS-APG007-EN 13Examples of Field-Installed Evaporator PipingSingle-Circuit RAUJsFigure 5. Type UF evaporator coil with one distributorFigure 6. Type U

14 SS-APG007-ENExamples of Field-Installed Evaporator PipingFigure 7. Type UF evaporator coil with four distributorsthermal expansionvalves (TXV)liqu

SS-APG007-EN 15Examples of Field-Installed Evaporator PipingDual-Circuit RAUJsFigure 8. Type UF evaporator coil with two distributorsliquid line(circu

16 SS-APG007-ENExamples of Field-Installed Evaporator PipingFigure 9. Type UF evaporator coil with four distributorsliquid line(circuit 1)filter drie

SS-APG007-EN 17Examples of Field-Installed Evaporator PipingFigure 10. Type UF evaporator coil with eight distributors ‘liquid line(circuit 1)therma

18 SS-APG007-ENPartsTable 2. Component selection summaryUNIT RAUJC20 RAUJC25 RAUJC30 RAUJC40 RAUJC50 RAUJC60 RAUJC80 RAUJD100 RAUJD120Refrigerant ckt

SS-APG007-EN 19PartsTable 3. Expansion valves for RAUJ 20- through 120-ton applicationRefrigerant Manufacturer Tonnage Range Model Number Trane PartR-

Trane optimizes the performance of homes and buildings around the world. A business of Ingersoll Rand, the leader in creating and sustaining safe, com

SS-APG007-EN © 2012 Trane All rights reservedWarnings, Cautions and NoticesWarnings, Cautions and Notices. Note that warnings, cautions and notices

ii SS-APG007-ENWarnings, Cautions and NoticesTrademarksTrane, Frostat and the Trane logo are trademarks of Trane in the United States and other count

Table of ContentsSS-APG007-EN iiiOverview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv SS-APG007-EN

SS-APG007-EN 1OverviewTrane’s RAUJ 20- through 120-ton condensing unit product line incorporating fin and tube condenser coils has been designed for u

2 SS-APG007-ENOverviewThe origin of the requirements for equivalent line lengths of components, line pressure drop, and minimum and maximum refrigera

SS-APG007-EN 3OverviewEquipment PlacementMinimize Distance Between ComponentsFor a split air-conditioning system to perform as reliably and inexpensiv