Trane Custom Climate Changer Air Handlers manual Examples of Field-Installed Evaporator Piping

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Installation

Frostat™ coil frost protection. The Frostat control is the preferred method for protecting evaporator coils from freezing when the refrigerant coil is used with Trane condensing units. It senses the suction-line temperature and temporarily disables mechanical cooling if it detects frost conditions. The control is mechanically attached to the outside of the refrigerant line, near the evaporator, and wired to the unit control panel.

Ball shutoff valve. Adding manual, ball-type shutoff valves upstream and downstream of the filter simplifies replacement of the filter core.

Examples of Field-Installed Evaporator Piping

Single-Circuit Condensing Units: Evaporator Coil with One Distributor (see Figure 35)

1Pitch the liquid line slightly—

1 inch/10 feet [1 cm/3 m]—so that the refrigerant drains toward the evaporator.

2Provide one expansion valve per distributor.

3Slightly pitch the outlet line from the suction header toward the suction riser—that is, 1 inch/

10 feet [1 cm/3 m] in the direction of flow. Use the tube diameter that matches the suction-header connection.

4For the vertical riser, use the tube diameter recommended by the condensing unit manufacturer. Assure the top of the riser is higher than the evaporator coil.

5Arrange the suction line so the refrigerant gas leaving the coil flows downward, past the lowest suction-header outlet, before turning upward.

6Pitch the suction line slightly—

1 inch/10 feet [1 cm/3 m]—so the refrigerant drains toward the evaporator.

7Insulate the suction line.

Figure 35. Single-circuit evaporator coil with one distributor

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Contents July Custom Climate Changer Air HandlersCAH-SVX01A-EN Protecting Environment Unit DescriptionContents Factory-Mounted Controls Wiring Sizes ConnectionsOperating Environment ControlsUltraviolet UV Germicidal Irradiation Lights optional Use Canvas Only Receiving ChecklistResolving Shipping Damage Job Site Storage RecommendationsOutdoor Storage Considerations Pre-Installation Requirements General StoragePreparing the Unit Site Long-Term StorageTypical Curb Installation Checklist Roof Curb InstallationGeneral Lifting Considerations Lifting and RiggingAssembly Hardware Unit AssemblyJoining Sections Edge-to- Edge TCP Model Assembly InstructionsTCP base assembly TCP Base Section Assembly TypicalTCP Outdoor Roof Section Assembly Typical Installation TCP Wall Section Assembly TypicalInstallation TCP Indoor Roof Section Assembly Typical Indoor Roof Assembly CompleteBase to Wall Assembly Complete Joining sections Edge to Edge TCC Model Assembly InstructionsApply butyl tape to shipping splits Add caulk along the seam Join internal shipping split frame Installation TCC indoor roof sections assembly typical TCC wall sections assembly typicalJoin outdoor roof panels at the seams Installation TCC outdoor roof sections assembly typicalTrim roof joint strip Fans Component Installation RequirementsIsolator Adjustment Duct ConnectionsMagnahelic Air Filter Gage Traq DampersControl Dampers Front Load Filters Installation Air FiltersBag or Cartridge Filters Outdoor Unit Weather HoodsPrevent Coil Damage Use a Backup WrenchCoil Piping Connections General RecommendationsWater Damage Installation Drain Pan TrappingCoil Damage Installation Steam Coil PipingInstallation Typical piping for type 5W one-row water coil Water Coil PipingLiquid Lines Installation Refrigerant Coil PipingType F refrigerant coil with packed elbow Valve DamageSingle-circuit evaporator coil with one distributor Examples of Field-Installed Evaporator PipingSingle-circuit evaporator coil with two distributors Single-circuit evaporator coil with four distributors Dual-circuit evaporator coil with two distributors Dual-circuit evaporator coil with four distributors Dual-circuit evaporator coil with eight distributors Capacitors WiringHazardous Voltage with Use Copper Conductors OnlyExternal Insulating Requirements Junction box mounting and wiring detailsMotor-Related Checks Pre-Startup ChecklistFan-Related Checks Coil-Related Checks Proper Water TreatmentCalculate Motor Voltage Imbalance Unit OperationGeneral Checks Tension Belts Correctly Startup Tension the Fan BeltStartup Multibelt Check Determine Fan SpeedSheave Alignment Routine Maintenance Front Load Filters Air FiltersThrowaway Filters Permanent FiltersBearing Set Screw Alignment Inspecting and Cleaning FansDrain Pans FansFan Motor Inspection Fan Bearing LubricationRefrigerant Coils CoilsSteam and Water Coils Type K Cooling CoilsMoisture Purge Cycle Internal Insulation Ultraviolet UV Germicidal Irradiation Lights Replacement of ultraviolet bulbsTroubleshooting Alignment section on CAH-SVX01A-EN CAH-SVX01A-EN Trane