Installation, Operation, and Maintenance Midrange Self-Contained Units Models SCWH/SCRH 3, 5, 7.
general information About This Manual Literature Change History Use this manual for commercial selfcontained models SCWH and SCRH. This is the original issue of this manual. It provides specific installation, owner maintenance, and diagnostic troubleshooting instructions for “AO” and later design sequences. Note: The procedures discussed in this manual should only be performed by qualified, experienced HVAC technicians.
contents Cross reference to related publications/information: Midrange Self-Contained catalog, PKG-PRC012-EN Installation…………………………………………………2 general information ……………………………………………2 pre-installation considerations ………………………………6 dimensions & weights ………………………………………11 mechanical requirements ……………………………………17 electrical requirements ………………………………………19 installation procedure ………………………………………21 pre-startup requirements ……………………………………22 startup …………………………………………………………23 Operation…………………………………………………24 sequence of op
Installation general information Midrange Model Number Description Following is a complete description of the midrange model number. Each digit in the model number has a corresponding code that identifies specific unit options.
Installation General The midrange models SCWH/SCRH is a high efficiency, vertical air condioner. units have either front or top discharge configuration options and easy service access. Unit construction is heavy gage steel with a baked enamel finish. Available unit voltages are 208/3/60, 230/ 3/60, 460/3/60, and 575/3/60. Refrigeration Circuits Units are configured in single or double refrigeration circuits.
Installation Pre-Installation Considerations Pre-Installation Checklist Complete the following checklist before beginning unit installation. Verify the unit size and tagging with the unit nameplate. Make certain the floor or foundation is level, solid, and sufficient to support the unit and accessory weights. Level or repair the floor before positioning the unit if neccesary. Allow minimum recommended clearances for routine maintenance and service. Refer to unit submittals for dimensions.
pre-installation considerations Installation Service Access 3 through 7.
Installation pre-installation considerations Service Access 10 through 15-ton SCRH/SCWH 10, 12, & 15-ton SCWH/SRCH with side-mounted fan configuration, field converted 8 PKG-SVX14A-EN
pre-installation considerations Installation Isolator Placement Table I-PC-1. Isolator load points, units with a vertical discharge configuration, lbs. model Note: Isolators are field-provided. L1 L2 L3 L4 L1 L2 SCRB/SIRB 3-ton 5-ton 7.5-ton 10-ton 15-ton 99 115 154 208 243 105 122 203 266 332 120 157 227 273 359 L3 L4 SCWB/SIWB 127 166 221 253 356 105 129 177 263 315 133 165 234 334 388 118 166 230 293 382 124 165 231 300 375 Table I-PC-2.
Installation WARNING Improper Unit Lift! Test lift unit approximately 24 inches high to verify the proper center-ofgravity lift point. To avoid dropping the unit, reposition the lifting point if the unit is not level. Failure to properly lift the unit could result in death, serious injury, or possible equipment/ property-only damage. Proper Lifting Procedure Follow these instructions and reference Figure I-PC-3. 1. Slide a fork lift into the opening provided on the unit base. Move the fork lift carefully.
dimensions & weights Installation 3 & 5-tons SCWH/SCRH vertical discharge horizontal discharge (field converted) SCRH SCWH SCWH/SCRH dimensions & weight, in-lbs. unit size L M N O P Q R S operating weight B C D E F G J 3 31.89 64.17 22.24 5.65 11.93 14.31 10.63 18.00 7.80 7.80 15.60 15.63 20.20 6.28 4.33 8.58 4.37 494 459 5 36.41 75.98 24.01 7.73 13.03 15.65 11.61 20.31 12.32 8.66 20.98 18.58 24.20 7.10 5.43 6.38 7.
Installation 7.5-tons SCWH/SCRH vertical discharge SCWH dimensions & weights horizontal discharge (field converted) SCRH SCWH/SCRH weight, lbs. unit size shipping weight operating weight 7.
dimensions & weights Installation 10, 12, & 15-tons with top-mounted fan configuration SCWH/SCRH vertical discharge SCWH horizontal discharge (field converted) SCRH SCWH/SCRH dimensions & weight, in-lbs. unit tons A B C D E F 10 66.75 88.78 7.04 18.07 57.28 19.01 12 65.75 92.71 7.04 18.07 61.22 22.95 15 80.31 92.71 19.83 19.83 61.22 22.95 29.01 PKG-SVX14A-EN G J K 25.0 5.23 7.48 5 29.01 5.23 7.48 5 4.76 5.12 3 N shipping weight operating weight /8 8.
dimensions & weights Installation 10, 12, & 15-tons with side-mounted fan configuration, field converted SCWH/SCRH Notes: 1. Base rail must be attached to the floor before converting unit to side-mounted fan configuration. 2. Coil or electric heater cannot be assembed inside the cabinet with the side-mounted fan configuration. SCWH/SCRH Dimensions, in. unit tons 14 A C D E F G 10 65.75 7.04 18.07 57.28 66.93 25.79 12 65.75 7.04 18.07 61.22 66.93 29.73 15 80.31 19.83 19.83 61.
dimensions & weights Installation Plenum Plenum dimensions & weight, in-lbs. unit size A B weight 3-ton 31.89 22.24 44 5-ton 36.41 24.01 54 7.5-ton 40.94 28.74 73 10 & 12-ton 65.75 29.52 120 15-ton 80.31 29.52 146 Hot water coil 3 & 5-ton units A 3.15 0.59 B 1.57 2.18 1.38 5.91 G 8.39 D F 0.28 0.39 0.39 C 0.59 1.38 2.18 E 1.03 1.03 1.08 1.0 NPT 0.75 0.75 5.9 SCWH/SCRH Hot water coil dimensions & weights, 3 & 5-ton units, in-lbs.
dimensions & weights Installation Hot water coil 7.5-ton units 3.15 35.51 5.91 1.57 14.64 20.7 16.25 17.00 8.48 2.22 1.87 1.55 0.39 28.03 0.75 0.43 34.72 0.39 3.03 0.39 1.87 0.75 2.22 1.55 8.48 0.28 0.39 1.03 1.03 1.08 1.0 NPT 0.75 5.9 0.75 SCWH/SCRH Hot water coil dimensions & weights, in-lbs. Hot water coil 10 thru 15-ton units size A B C D weight 7.5-ton - - - - 24 10-ton 58.72 50.98 6.95 59.51 49 12-ton 58.72 50.98 6.95 59.51 49 15-ton 73.29 63.
Installation Duct Connections Water Piping Install all air ducts according to the National Fire Protection Association standards for the “Installation of Air Conditioning and Ventilation Systems other than Residence Type (NFPA 90A) and Residence Type Warm Air Heating and Air Conditioning Systems (NFPA 90B). Condenser Connections Make duct connections to the unit with a flexible material such as heavy canvas. If a fire hazard exists, Trane recommends using Flexweave 1000, type FW30 or equivalent canvas.
Installation Refrigerant Piping (Air-Cooled Units Only) Brazing Procedures Proper brazing techniques are essential when installing refrigerant piping. Keep Reference industry recommendations the following factors in mind when for air-cooled unit refrigerant piping. If making sweat connections. suspending piping from the building, use 1. When heating copper in the presence isolation hangers to prevent vibration of air, copper oxide forms. To prevent transmission.
Installation Supply Power Wiring It is the installer’s responsibility to provide power supply wiring to the unit terminal block or the non-fused disconnect switch option. Wiring should conform to NEC and all applicable code requirements. 1. Verify the power supply available is compatible with the unit nameplate ratings. The supply power must be within 10%of the rated voltage listed on the unit nameplate. 2. Reference the electrical data in Table IER-1.
electrical requirements Installation Table I-ER-1. Model SCWH/SCRH electrical data evaporator standard motor model tons SC*H0303.... SC*H0304.... SC*H0305.... 208-230V/60Hz/3Ph 12.9 77.0 5.7 4.8 35.0 31.0 208-230V/60Hz/3Ph 22.9 155.0 460V/60Hz/3Ph 10.7 75.0 3 460V/60Hz/3Ph 575V/60Hz/3Ph 5 SC*H0503.... SC*H0504.... voltage compressor RLA LRA qty. evap. fan motor hp FLA qty. 0.5 1 2.21 1 1.00 0.80 5.00 1 1 2.50 1 evaporator oversized motor min. circuit MFS / MCB ampacity 18.
Installation Installation Checklist Reference the checklist below to verify all steps required to successfully install a deluxe self-contained unit are complete. This checklist is intended to acquaint the installing personnel with what is required in the installation process. It does not replace the detailed instructions detailed in the applicable sections of this manual. WARNING Hazardous voltage! Disconnect all electric power, including remote disconnects before servicing.
Installation Pre-Startup Checklist Complete this checklist after installing the unit to verify all recommended installation procedures are complete before unit startup. This does not replace the detailed instructions in the appropriate sections of this manual. Always read the entire section carefully to become familiar with the procedures. WARNING Hazardous Voltage! Disconnect all electrical power, including remote disconnects before servicing.
Installation Unit Startup Procedures 1. Check all electrical connections for tightness. 2. Be sure all unit accessories are properly set and installed. 3. Model SCWH: Verify condenser water piping is properly connected, supply, and return. 4. Model SCRH: Verify refrigerant piping is properly connected, hot gas, and liquid. 5. Inspect all ductwork and duct connections. 6. Check for proper belt tension. 7. Check fan drive sheaves, pulleys, and bearings. Unit Startup Checklist 1.
Operation Sequence of Operation The thermostat controls the unit operation. It has both manual and automatic switches so the thermostat maintains desired comfort levels. The fan switch allows manual selection of the fan speed using the On or Auto setting. With the switch set in the On position, the evaporator fan runs continously, independent from the thermostat temperature setting. The Auto position cycles the evaporator fan on and off with the demand for heating or cooling.
general information Maintenance Table M-GI-1. Midrange maintenance general data dimensions, in-lbs. height length depth weight (shipping / net) cooling performance net cooling capacity, btu/h EER nominal air flow, cfm system power, kW Copeland scroll compressor quantity model indoor coil, 3/8" tube size face area, sq. ft. rows / fpf water condenser, tube & tube water connection, in. indoor fan, belt-driven quantity diameter x width motor motor frame size air filter, 1" throwaway size / (quantity), in.
Maintenance Maintenance Procedures This section describes specific maintenance procedures that must be preformed as a part of the normal maintenance program. Always disconnect electrical power to the unit before performing these procedures and heed all warnings and cautions. WARNING Live Electrical Components! During installation, testing, servicing, and troubleshooting this equipment, it may be necessary to work with live electrical components.
Maintenance Refrigerant System Special Note on Refrigerant Emissions Follow the Trane recommended procedures on operation, maintenance, and service to ensure refrigerant conservation and emission reduction. Also, pay specific attention to the following: • Whenever removing refrigerant from equipment, recover for reuse, recycle, reprocess (reclaim), or properly destroy it. • Always determine possible refrigerant recycling or reclaiming requirements before beginning recovery.
maintenance procedures Maintenance CAUTION Motor Winding Damage! Do not use a megohm meter or apply greater than 50 VDC to a compressor motor winding while it is under a deep vacuum. Voltage sparkover may cause damage to the motor windings. WARNING Hazardous Pressures! If a heat source is required to raise the tank pressure during removal of refrigerant from cylinders, use only warm water or heat blankets to raise the tank temperature. Do not exceed a temperature of 150°F.
Maintenance Periodic Checklists Monthly Checklist The following checklist provides the recommended maintenance schedule to keep the unit running efficiently. WARNING Hazardous Voltage! Disconnect all electrical power including remote disconnects before servicing unit. Follow proper lockout/tagout procedures to ensure power cannot be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. 1. Inspect unit air filters.
Maintenance troubleshooting WARNING Hazardous voltage! Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury. Troubleshooting Use the following steps and procedures to help correct these common problems. Problem The entire unit does not operate. Possible cause 1. Power interruption 2.
Maintenance Problem Insufficient cooling Possible cause 1. Insufficient air flow due to: a) dirty evaporator; b) ice on evaporator coils (indicates airflow restriction through evaporator); c) dirty filter; d) obstructed discharge air intake; e) fan motor not running; f) evaporator fan or fan wheel slipping on motor shaft 2. Heat gain or loss in room exceeds unit capacity 3. Defective compressor 4. Insufficient refrigerant charge indicated by: a) low wattage; b) condenser air outlet cold 5.
Maintenance 32 typical wiring diagram PKG-SVX14A-EN
Maintenance PKG-SVX01A-EN typical wiring diagram 33
Maintenance 34 typical wiring diagram PKG-SVX14A-EN
Maintenance PKG-SVX01A-EN typical wiring diagram 35
www.trane.com For more information, contact your local Trane office or e-mail us at comfort@trane.com Literature Order Number PKG-SVX14A-EN Date October 2008 Supersedes PKG-SVX14A-EN September 2007 Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.
