Trane RT-SVX10C-EN Hazardous Voltage, Live Electrical Components, Use Copper Conductors Only

Page 39

Disconnect Switch External Handle

(Factory Mounted Option)

Units ordered with the factory mounted disconnect switch comes equipped with an externally mounted handle. This allows the operator to disconnect power from the unit with- out having to open the control panel door. The handle loca- tions and its three positions are shown below;

"ON" - Indicates that the disconnect switch is closed, allowing the main power supply to be applied at the unit.

"OFF" - Indicates that the disconnect switch is open, interrupting the main power supply to the unit controls.

"OPEN COVER/RESET" - Turning the handle to this position releases the handle from the disconnect switch, allowing the control panel door to be opened.

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.

Once the door has been opened, it can be closed with the handle in any one of the three positions outlined above, provided it matches the disconnect switch position.

The handle can be locked in the "OFF" position. While holding the handle in the "OFF" position, push the spring loaded thumb key, attached to the handle, into the base slot. Place the lock shackle between the handle and the thumb key. This will prevent it from springing out of posi- tion.

An overall layout of the field required power wiring is illus- trated in Figure 3-14. T insure that the unit's supply power wiring is properly sized and installed, follow the guildelines outlined below.

Note: All field installed wiring must conform to NEC guide- lines as well as State and Local codes.

WARNING

Live Electrical Components!

During installation, testing, servicing and troubleshoot- ing of this product, it may be necessary to work with live electrical components. Have a qualified licensed electri- cian or other individual who has been properly trained in

Installation (Continued)

handling live electrical components perform these tasks. Failure to follow all electrical safety precautions when exposed to live electrical components could result

in death or serious injury.

Verify that the power supply available is compatible with the unit's nameplate rating for all components. The avail- able power supply must be within 10% of the rated voltage stamped on the nameplate. Use only copper conductors to connect the 3-phase power supply to the unit.

CAUTION

Use Copper Conductors Only!

Unit terminals are not designed to accept other types of conductors. Failure to use copper conductors may re- sult in equipment damage.

Electric Heat Units (SEH_)

SEHF (20 through 75 Ton) electric heat units operating on 200/230 volts require two power supplies as illustrated in Figure 3-14. Unless the unit was ordered with the optional factory mounted non-fused disconnect switches, two field- supplied disconnect switches must be installed. The power wires for the electric heat is routed into the electric heat control panel using the thru-the-base access provided in the heating section. Refer to the appropriate illustration in Fig- ure 3-2, (Unit Base layout and Electrical Entrance diagram), for dimensional data.

20 through 75 Ton units operating on 460/575 volts and all 90 through 130 Ton units require one power entry as illus- trated in Figure 3-14.

Use the information provided in Table 3-7 and the "Power Wire Sizing & Protection Device Equations", to determine the appropriate wire size and Maximum Over current Pro- tection for the heaters/unit.

Note: Each power supply must be protected from short circuit and ground fault conditions. To comply with NEC, protection devices must be sized according to the "Maximum Over current Protection" (MOP) or "Recommended Dual Element" (RDE) fuse size data on the unit nameplate.

Provide grounding for the supply power circuit in the elec- tric heat control box.

Main Unit Power Wiring

Table 3-6 list the field connection wire ranges for both the main power terminal block 1TB1 and the optional main power disconnect switch 1S14. Table 3-7 list the compo- nent electrical data for 20 through 130 Ton units. The elec- trical service must be protected from over current and short circuit conditions in accordance with NEC requirements. Protection devices must be sized according to the electri- cal data on the nameplate. Refer to the "Power Wire Sizing

&Protection Device Equations", for determining;

a.the appropriate electrical service wire size based on "Minimum Circuit Ampacity" (MCA),

b.the "Maximum Over current Protection" (MOP) device,

c.the "Recommended Dual Element fuse size" (RDE).

38

Page 38 Page 40
Image 39
Page 38 Page 40
Contents Models Later Design SequenceWith 3-DTMScroll Compressors Overview of Manual Literature Change HistoryTable of Contents Model Number Description General InformationDigit 3 Unit Airflow Unit Description Fiberglass WoolHazard Identification General Information Commonly Used AcronymsSupply 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 Storage Unit Dimensions & Weight InformationNo Step Surface Unit Inspection As soon as the unit arrives at the job sitePage Sahf Cooling-Only Units 20 thru 75 Ton Electrical Entrance Data Unit Dimensions InstallationUnit Dimensional Data Dimensions Size Unit Base Dimensional Data DimensionsSEHF, SFHF, SLHF, SSHF, Sxhf Units 20 thru 75 Ton Unit Size Furnace Dimensions Note Size/MBH Length Height Unit Base Dimensional Data Dimensions SizeUnit Dimensions Size Electrical Entrance Data Unit Dimensions SizeSHG Cooling & Heating Units 90 through 130 Ton Sshf SahfSehf SlhfRoof Curb and Ductwork SE,SLSahf Sshf Sfhf Sxhf Sehg Sfhg Sxhg HF/G Pitch Pocket Location Installation Unit Rigging & PlacementIf a Trane Curb Accessory Kit is not used Heavy ObjectsTypical Unit Rigging Unit Base & Roof Curb Section Requirements for Electric Heat Units Main Electrical Power RequirementsInstallation Field Installed Control Wiring General Unit RequirementsInstallation Condensate Drain Connections Page Removing Supply and Exhaust Fan Shipping Channels Motors 5Hp Page Units with StatitracTM Installation Sensor & Tubing InstallationConnecting the Gas Supply Line to the Furnace Gas Train Hazardous Gases and Flammable VaporsGas Heat Units SFH 350 MBH 850 MBH Hot Water Heat Units SLH Flue Assembly InstallationFlue Assembly 1000 MBH Modulating 500 MBH 1000 MBHSSHG-90 Steam Heat Units SSHThrough 130 Ton units Page Hazardous Voltage Live Electrical ComponentsUse Copper Conductors Only Typical Field Power Wiring 20 thru 75 Ton Page FLA Supply Fan Motor FLA ea HorsepowerCondenser Fans Total FLA Exhaust Fan MotorCombustion Blower Motor Sfhf OnlyUnit Tonnage No. of Compressors Tonnage Type Designation On the Next Single Source Power 380V, 415V, 460V,Load Definitions Load = Current of the Largest Motor Compressor or FAN MotorMCA = 1.25 x Load MOP = 1.25 x Load Power Wire Sizing and Protection Device EquationsDisconnect Switch Sizing DSS Dual Source Power units 200VControls using 24 VAC Installation Controls using DC Analog Input/OutputsConstant Volume System Controls 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 OperationPropane Gas Gas Heating Sequence of OperationFenwal Ignition System Unit Start-UpModulating Gas Sequence of Operation Flame FailureFull and Limited Modulating Gas Furnace Electric Heat Sequence of Operation Unit Start-Up Wet Heat Sequence of OperationFreeze Protection Unit Power Compressor DamageElectrical Phasing Voltage Supply and Voltage Imbalance Voltage SupplyVoltage Imbalance IGV Service Test Guide for Component OperationSupply FAN If all of the fans are rotating backwards System Airflow Measurements Constant Volume SystemsRotating Components Verifying Proper Fan RotationCondenser Fan Location with Human Interface Designator Variable Air Volume Systems Optional with all units equipped with an economizer Exhaust Airflow MeasurementTraqTM Sensor Airflow Measurement Optional with all UnitsTon 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.CSTD AIRCFM RPM BHP HF-C30 000 HF-C20 000HF-C25 000 10,000AIR RPM BHP RPM BHP BHP RPM BHP RPM BHPFresh Air & Return Air Damper Operation Economizer Damper AdjustmentTo Adjust the Fresh Air Damper Travel Exhaust Air DampersTon Units Damper Travel Adjustment PositionConnecting Rod Crank Arm Hole Configuration70 & 105 Ton Fresh Air & Return Air Linkage AdjustmentCompressor Start-Up All SystemsAt Low Ambient Start-Up Compressor Operational SoundsRefrigerant Charging At ShutdownCompressor 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 Thermostatic Expansion Valves Charging by SubcoolingLow Ambient Dampers Gas Furnace Start-Up Electric, Steam and Hot Water Start-UpTwo Stage Gas Furnace High-Fire AdjustmentCombustion Air Adjustment O2 Low-Fire Adjustment 500 MBH, 850 & 1,000 MBH onlyMBH Firing ManifoldCO2 Pressure Full Modulating Gas Furnace Heat ExchangerUnit control Limited Modulating Gas Furnace Unit Start-Up Modulating Gas RegulatorModulating Gas Regulator Legend Typical Gas Furnace Unit Start-Up Final Unit CheckoutService & Maintenance Unit Internal Fuse Replacement Data & VFD Factory Settings Service & MaintenanceModel Type Unit Model Box-type Note QtyQty Size of each Wet Heat Coil Fin Data Total Coil FinsService & Maintenance Fan Belt Adjustment Scroll Compressor Replacement Suction Line Filter/Drier InstallationGripbelts Gripnotch Cross Small P.D Section Range Min Max Hazardous Voltage! w/Capacitors VFD Programming ParametersSupply and Exhaust Fan VFD Programming Parameters Service & Maintenance Monthly Maintenance FiltersCooling Season Heating Season Coil CleaningCoil Cleaners Contains RefrigerantSteam or Hot Water Coils 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
Top Page Image Contents