Trane RT-SVX10C-EN Compressor Start-Up, Fresh Air & Return Air Linkage Adjustment, All Systems

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Figure 4-5

Fresh Air & Return Air Linkage Adjustment

 

Top View

RETURN AIR

 

FRESH AIR

 

DAMPERS

 

DAMPERS

 

 

 

 

 

 

 

3

 

1

4

8

2

5

FILTER

6

7

 

SECTION

 

 

 

Compressor Start-Up

(All Systems)

1.Ensure that the "System" selection switch at the remote panel is in the "Off" position.

2.Before closing the disconnect switch, ensure that the compressor discharge service valve and the liquid line service valve for each circuit is back seated.

CAUTION

Compressor Damage!

Do not allow liquid refrigerant to enter the suction line. Excessive liquid accumulation in the liquid lines may result in compressor damage.

COMPRESSOR SERVICE VALVES MUST BE FULLY OPENED BEFORE START-UP (SUCTION, DISCHARGE, LIQUID LINE, AND OIL LINE).

3.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 to allow the crankcase heater to operate a minimum of 8 hours be- fore continuing.

Note: Compressor Damage could occur if the crankcase heater is not allowed to operate the minimum of 8 hours before starting the compressor(s).

Unit Start-Up (Continued)

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

5.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 RT-SVP01A-EN for CV applications or RT-SVP02A-EN for VAV applications for the SERVICE TEST screens and programming instructions.

6.Use Table 4-1 to program the following system compo- nents for operation by scrolling through the displays;

20 to 30 Ton Compressor 1A (On) Compressor 1B (Off) Condenser Fans

40 through 60 Ton

Compressor 1A (On)

Compressor 1B (Off)

Compressor 2A (Off)

Compressor 2B (Off)

Condenser Fans

70 & 105 Ton

Compressor 1A & 1B (On)

Compressor 1C (Off)

Compressor 2A & 2B (Off)

Compressor 2C (Off)

Condenser Fans

115 & 130 Ton

Compressor 1A & 1B (On)

Compressor 1C & 1D (Off)

Compressor 2A & 2B (Off)

Compressor 2C & 2D (Off)

Condenser Fans

7.Attach a set of service gauges onto the suction and dis- charge gauge ports for each circuit. Refer to Figure 4-6 for the various compressor locations.

8.Once the configuration for the components 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!

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.

9.Press the TEST START key to start the test. Remember that the delay designated in step 8 must elapse before the system will begin to operate.

10.Once each compressor or compressor pair has started, verify that the rotation is correct. If a scroll compressor is rotating backwards, it will not pump and a loud rattling sound can be observed. Check the electrical phasing at the load side of the compressor contactor. If the phasing is correct, before condemning the compressor, inter-

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Contents Models Later Design SequenceWith 3-DTMScroll Compressors Literature Change History Overview of ManualTable of Contents General Information Model Number DescriptionDigit 3 Unit Airflow Fiberglass Wool Hazard IdentificationGeneral Information Commonly Used Acronyms Unit DescriptionGeneral Information Supply AIRVentilation Control Module VCM Design special option only CFMLead-Lag Constant Volume CV Units Variable Air Volume VAV Units Unit Component Layout and Shipwith LocationsGeneral Information Space Temperature Averaging Control Module Locations for SHF 40, 60, 70 & 75 Ton Units Table of Contents Unit Dimensions & Weight Information No Step SurfaceUnit Inspection As soon as the unit arrives at the job site StoragePage Sahf Cooling-Only Units 20 thru 75 Ton Installation Unit Dimensional Data Dimensions SizeUnit Base Dimensional Data Dimensions Electrical Entrance Data Unit DimensionsSEHF, SFHF, SLHF, SSHF, Sxhf Units 20 thru 75 Ton Unit Base Dimensional Data Dimensions Size Unit Dimensions SizeElectrical Entrance Data Unit Dimensions Size Unit Size Furnace Dimensions Note Size/MBH Length HeightSHG Cooling & Heating Units 90 through 130 Ton Sahf SehfSlhf SshfRoof Curb and Ductwork SE,SLSahf Sshf Sfhf Sxhf Sehg Sfhg Sxhg HF/G Installation Unit Rigging & Placement If a Trane Curb Accessory Kit is not usedHeavy Objects Pitch Pocket LocationTypical Unit Rigging Unit Base & Roof Curb Section Main Electrical Power Requirements Installation Field Installed Control WiringGeneral Unit Requirements Requirements for Electric Heat UnitsInstallation Condensate Drain Connections Page Removing Supply and Exhaust Fan Shipping Channels Motors 5Hp Page Installation Sensor & Tubing Installation Units with StatitracTMConnecting the Gas Supply Line to the Furnace Gas Train Hazardous Gases and Flammable VaporsGas Heat Units SFH 350 MBH 850 MBH Flue Assembly Installation Flue Assembly1000 MBH Modulating 500 MBH 1000 MBH Hot Water Heat Units SLHSteam Heat Units SSH SSHG-90Through 130 Ton units Page Hazardous Voltage Live Electrical ComponentsUse Copper Conductors Only Typical Field Power Wiring 20 thru 75 Ton Page Supply Fan Motor FLA ea Horsepower Condenser Fans Total FLAExhaust Fan Motor FLACombustion Blower Motor Sfhf OnlyUnit Tonnage No. of Compressors Tonnage Type Designation Single Source Power 380V, 415V, 460V, Load Definitions Load= Current of the Largest Motor Compressor or FAN Motor On the NextPower Wire Sizing and Protection Device Equations Disconnect Switch Sizing DSSDual Source Power units 200V MCA = 1.25 x Load MOP = 1.25 x LoadControls using 24 VAC Installation Controls using DC Analog Input/OutputsConstant Volume System Controls Variable Air Volume System Controls Constant Volume or Variable Air Volume System ControlsPressurize DepressurizePurge FireRefer to Wiring Notes on 16A16B Page 17A 17B VAV Setpoint Input VoltageTable of Contents Cooling Sequence of Operation Sequence of OperationGas Heating Sequence of Operation Fenwal Ignition SystemUnit Start-Up Propane GasModulating 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 Service Test Guide for Component Operation IGVSupply FAN System Airflow Measurements Constant Volume Systems Rotating ComponentsVerifying Proper Fan Rotation If all of the fans are rotating backwardsCondenser Fan Location with Human Interface Designator Variable Air Volume Systems Exhaust Airflow Measurement TraqTM Sensor Airflow MeasurementOptional with all Units Optional with all units equipped with an economizer20 & 25 Ton Supply Fan Performance without Inlet Guide Vanes Ton Supply Fan Performance without Inlet Guide VanesWocfm 1200 RPM 40 HP 40% 300 RP Standard Evaporator Coil 20000 30000 40000 50000 60000 Drop 20 & 25 Ton Supply Fan Performance with Inlet Guide Vanes Ton Supply Fan Performance with Inlet Guide Vanes15 HP 900 RPM 80% 10 HP RPM Through 75 Ton Component Static Pressure Drops Inches W.C AIRSTD AIRCFM RPM BHP HF-C20 000 HF-C25 00010,000 HF-C30 000RPM BHP BHP RPM BHP RPM BHP AIR RPM BHPEconomizer Damper Adjustment To Adjust the Fresh Air Damper TravelExhaust Air Dampers Fresh Air & Return Air Damper OperationDamper Travel Adjustment Position Connecting Rod Crank Arm HoleConfiguration Ton UnitsFresh Air & Return Air Linkage Adjustment Compressor Start-UpAll Systems 70 & 105 TonCompressor Operational Sounds Refrigerant ChargingAt 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 Thermostatic Expansion Valves Charging by SubcoolingLow Ambient Dampers Electric, Steam and Hot Water Start-Up Gas Furnace Start-UpHigh-Fire Adjustment Combustion Air Adjustment O2Low-Fire Adjustment 500 MBH, 850 & 1,000 MBH only Two Stage Gas FurnaceMBH Firing ManifoldCO2 Pressure Full Modulating Gas Furnace Heat ExchangerUnit control Limited Modulating Gas Furnace Unit Start-Up Modulating Gas RegulatorModulating Gas Regulator Legend Unit Start-Up Final Unit Checkout Typical Gas FurnaceService & Maintenance Service & Maintenance Unit Internal Fuse Replacement Data & VFD Factory SettingsUnit Model Box-type Note Qty Qty Size of eachWet Heat Coil Fin Data Total Coil Fins Model TypeService & 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 Coil Cleaning Heating SeasonCoil 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 Warranty and Liability Clause Equipment Damage From Ultraviolet UV Lights115 116
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