Trane RT-SVX10C-EN specifications Rotating Components, Verifying Proper Fan Rotation

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Verifying Proper Fan Rotation

1.Ensure that the "System" selection switch at the remote panel is in the "Off" position and the "Fan" selection switch for constant volume units is in the "Auto" position. (VAV units do not utilize a "Fan" selection input.)

2.Close the disconnect switch or circuit protector switch that provides the supply power to the unit's terminal block 1TB1 or the unit mounted disconnect switch 1S14.

3.Turn the 115 volt control circuit switch 1S1 and the 24 volt control circuit switch 1S70 to the "On" position.

4.Open the Human Interface access door, located in the unit control panel, and press the SERVICE MODE key to display the first service screen. Refer to the latest edition of the appropriate SAHF-PTG manual for CV or VAV ap- plications for the SERVICE TEST screens and program- ming instructions.

5.Use Table 4-1 to program the unit Fans for operation by scrolling through the displays. All of the Fans (Supply, Exhaust, and Condenser fans) can be programed to be "On", if desired. Verify proper fan rotation for VFDs with bypass.

Refer to Figure 4-1 for the condenser fan locations and the Human Interface designator.

6.Once the configuration for the Fans is complete, press the NEXT key until the LCD displays the “Start test in __Sec.” screen. Press the + key to designate the delay before the test is to start. This service test will begin after the TEST START key is pressed and the delay desig- nated in this step has elapsed. Press the ENTER key to confirm this choice.

WARNING

Rotating Components!

During installation, testing, servicing and troubleshoot- ing of this product it may be necessary to measure the speed of rotating components. Have a qualified or li- censed service individual who has been properly trained in handling exposed rotating components, per- form these tasks. Failure to follow all safety precau- tions when exposed to rotating components could re- sult in death or serious injury.

7.Press the TEST START key to start the test. Remember that the delay designated in step 6 must elapse before the fans will begin to operate.

8.Check the supply fan and the exhaust fans (if equipped) for proper rotation. The direction of rotation is indicated by an arrow on the fan housings. Check the condenser fans for clockwise rotation when viewed from the top.

If all of the fans are rotating backwards;

a. Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation.

b. Open the field supplied disconnect switch upstream of the rooftop unit. Lock the disconnect switch in the open position while working at the unit.

Unit Start-Up (Continued)

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote discon- nects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvert- ently energized. Failure to disconnect power before ser- vicing could result in death or serious injury.

c. Interchange any two of the field connected main power wires at the unit terminal block 1TB1 or the factory mounted disconnect switch 1S14.

Note: Interchanging "Load" side power wires at the fan contactors will only affect the individual fan rotation. Ensure that the voltage phase sequence at the main terminal block 1TB1 or the factory mounted disconnect switch 1S14 is ABC as outlined in the "Electrical Phasing" section.

If some of the fans are rotating backwards;

a. Press the STOP key at the Human Interface Module in the unit control panel to stop the fan operation.

b. Open the field supplied disconnect switch upstream of the rooftop unit. Lock the disconnect switch in the open position while working at the unit.

c. Interchange any two of the fan motor leads at the contactor for each fan that is rotating backwards.

System Airflow Measurements

Constant Volume Systems

1.Ensure that the "System" selection switch at the remote panel is in the "Off" position and the "Fan" selection switch for constant volume units is in the "Auto" position. (VAV units do not utilize a "Fan" selection input.)

2.Close the disconnect switch or circuit protector switch that provides the supply power to the unit's terminal block 1TB1 or the unit mounted disconnect switch 1S14.

WARNING

Hazardous Voltage!

Disconnect all electric power, including remote discon- nects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvert- ently energized. Failure to disconnect power before ser- vicing could result in death or serious injury.

HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1S14.

3.Turn the 115 volt control circuit switch 1S1 and the 24 volt control circuit switch 1S70 to the "On" position.

4.Open the Human Interface access door, located in the unit control panel, and press the SERVICE MODE key to display the first service screen. Refer to the latest edition of the appropriate SAHF-PTG manual for CV or VAV ap- plications for the SERVICE TEST screens and program- ming instructions.

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Contents With 3-DTMScroll Compressors ModelsLater Design Sequence Overview of Manual Literature Change HistoryTable of Contents Model Number Description General InformationDigit 3 Unit Airflow Hazard Identification Fiberglass WoolGeneral Information Commonly Used Acronyms Unit DescriptionSupply AIR General InformationCFM Ventilation Control Module VCM Design special option onlyLead-Lag Constant Volume CV Units Unit Component Layout and Shipwith Locations Variable Air Volume VAV UnitsGeneral Information Space Temperature Averaging Control Module Locations for SHF 40, 60, 70 & 75 Ton Units Table of Contents No Step Surface Unit Dimensions & Weight InformationUnit Inspection As soon as the unit arrives at the job site StoragePage Sahf Cooling-Only Units 20 thru 75 Ton Unit Dimensional Data Dimensions Size InstallationUnit Base Dimensional Data Dimensions Electrical Entrance Data Unit DimensionsSEHF, SFHF, SLHF, SSHF, Sxhf Units 20 thru 75 Ton Unit Dimensions Size Unit Base Dimensional Data Dimensions SizeElectrical Entrance Data Unit Dimensions Size Unit Size Furnace Dimensions Note Size/MBH Length HeightSHG Cooling & Heating Units 90 through 130 Ton Sehf SahfSlhf SshfSahf Sshf Sfhf Sxhf Sehg Sfhg Sxhg HF/G Roof Curb and DuctworkSE,SL If a Trane Curb Accessory Kit is not used Installation Unit Rigging & PlacementHeavy Objects Pitch Pocket LocationTypical Unit Rigging Unit Base & Roof Curb Section Installation Field Installed Control Wiring Main Electrical Power RequirementsGeneral Unit Requirements Requirements for Electric Heat UnitsInstallation Condensate Drain Connections Page Removing Supply and Exhaust Fan Shipping Channels Motors 5Hp Page Units with StatitracTM Installation Sensor & Tubing InstallationGas Heat Units SFH Connecting the Gas Supply Line to the Furnace Gas TrainHazardous Gases and Flammable Vapors 350 MBH 850 MBH Flue Assembly Flue Assembly Installation1000 MBH Modulating 500 MBH 1000 MBH Hot Water Heat Units SLHSSHG-90 Steam Heat Units SSHThrough 130 Ton units Page Use Copper Conductors Only Hazardous VoltageLive Electrical Components Typical Field Power Wiring 20 thru 75 Ton Page Condenser Fans Total FLA Supply Fan Motor FLA ea HorsepowerExhaust Fan Motor FLAUnit Tonnage No. of Compressors Tonnage Type Designation CombustionBlower Motor Sfhf Only Load Definitions Load Single Source Power 380V, 415V, 460V,= Current of the Largest Motor Compressor or FAN Motor On the NextDisconnect Switch Sizing DSS Power Wire Sizing and Protection Device EquationsDual Source Power units 200V MCA = 1.25 x Load MOP = 1.25 x LoadConstant Volume System Controls Controls using 24 VACInstallation Controls using DC Analog Input/Outputs Constant Volume or Variable Air Volume System Controls Variable Air Volume System ControlsDepressurize PressurizeFire Purge16A Refer to Wiring Notes on16B Page 17A 17B Input Voltage VAV SetpointTable of Contents Sequence of Operation Cooling Sequence of OperationFenwal Ignition System Gas Heating Sequence of OperationUnit Start-Up Propane GasFull and Limited Modulating Gas Furnace Modulating Gas Sequence of OperationFlame Failure Freeze Protection Electric Heat Sequence of OperationUnit Start-Up Wet Heat Sequence of Operation Electrical Phasing Unit PowerCompressor Damage Voltage Imbalance Voltage Supply and Voltage ImbalanceVoltage Supply IGV Service Test Guide for Component OperationSupply FAN Rotating Components System Airflow Measurements Constant Volume SystemsVerifying Proper Fan Rotation If all of the fans are rotating backwardsCondenser Fan Location with Human Interface Designator Variable Air Volume Systems TraqTM Sensor Airflow Measurement Exhaust Airflow MeasurementOptional with all Units Optional with all units equipped with an economizerTon Supply Fan Performance without Inlet Guide Vanes 20 & 25 Ton Supply Fan Performance without Inlet Guide VanesWocfm 1200 RPM 40 HP 40% 300 RP Standard Evaporator Coil 20000 30000 40000 50000 60000 Drop Ton Supply Fan Performance with Inlet Guide Vanes 20 & 25 Ton Supply Fan Performance with Inlet Guide Vanes15 HP 900 RPM 80% 10 HP RPM AIR Through 75 Ton Component Static Pressure Drops Inches W.CCFM RPM BHP STDAIR HF-C25 000 HF-C20 00010,000 HF-C30 000AIR RPM BHP RPM BHP BHP RPM BHP RPM BHPTo Adjust the Fresh Air Damper Travel Economizer Damper AdjustmentExhaust Air Dampers Fresh Air & Return Air Damper OperationConnecting Rod Crank Arm Hole Damper Travel Adjustment PositionConfiguration Ton UnitsCompressor Start-Up Fresh Air & Return Air Linkage AdjustmentAll Systems 70 & 105 TonRefrigerant Charging Compressor Operational SoundsAt Shutdown At Low Ambient Start-UpCompressor Locations Cooling Cycle Pressure Curve 340 320 Full Load 380 360 340 OD Ambient Full Load 380 360 340 OD Ambient 320 240 220 380 360 OD Ambient Low Ambient Dampers Thermostatic Expansion ValvesCharging by Subcooling Gas Furnace Start-Up Electric, Steam and Hot Water Start-UpCombustion Air Adjustment O2 High-Fire AdjustmentLow-Fire Adjustment 500 MBH, 850 & 1,000 MBH only Two Stage Gas FurnaceCO2 Pressure MBHFiring Manifold Unit control Full Modulating Gas FurnaceHeat Exchanger Modulating Gas Regulator Legend Limited Modulating Gas Furnace Unit Start-UpModulating Gas Regulator Typical Gas Furnace Unit Start-Up Final Unit CheckoutService & Maintenance Unit Internal Fuse Replacement Data & VFD Factory Settings Service & MaintenanceQty Size of each Unit Model Box-type Note QtyWet Heat Coil Fin Data Total Coil Fins Model TypeService & Maintenance Fan Belt Adjustment Gripbelts Gripnotch Cross Small P.D Section Range Min Max Scroll Compressor ReplacementSuction Line Filter/Drier Installation Supply and Exhaust Fan VFD Programming Parameters Hazardous Voltage! w/CapacitorsVFD Programming Parameters Cooling Season Service & Maintenance Monthly MaintenanceFilters Heating Season Coil CleaningSteam or Hot Water Coils Coil CleanersContains Refrigerant Final Process Index See Figure Gate type valve 36-37 See -12 Figure See VOM Contacts -16 Figure Equipment Damage From Ultraviolet UV Lights Warranty and Liability Clause115 116
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