Download
Share
Print this page
Trane Performance Climate Changer UCCA Installation, Operation And Maintenance Manual
  1. Manuals
  2. Brands
  3. Trane Manuals
  4. Air Handlers
  5. Performance Climate Changer UCCA
  6. Installation, operation and maintenance manual
Trane Performance Climate Changer UCCA Installation, Operation And Maintenance Manual

Trane Performance Climate Changer UCCA Installation, Operation And Maintenance Manual

Hide thumbs

Advertisement

Quick Links

Download this manual
Installation, Operation, and Maintenance
Performance Climate Changer™
Air Handlers
Model UCCA
Sizes 3 to 30
Indoor and Outdoor Applications
Dischage Plenum
Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment
can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or
serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
October 2024
Electric
Fan
Heat
Control Box
VFD
SAFETY WARNING
CLCH-SVX017A-EN
Coil
Coil
Mixing Box /
Filter
Pipe Cabinet
Hood

Advertisement

loading
Need help?

Need help?

Do you have a question about the Performance Climate Changer UCCA and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Trane Performance Climate Changer UCCA

Summary of Contents for Trane Performance Climate Changer UCCA

  • Page 1 Installation, Operation, and Maintenance Performance Climate Changer™ Air Handlers Model UCCA Sizes 3 to 30 Indoor and Outdoor Applications Electric Coil Coil Hood Heat Control Box Mixing Box / Dischage Plenum Filter Pipe Cabinet SAFETY WARNING Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training.
  • Page 2 (HCFCs). Not all refrigerants containing these compounds bump cap, fall protection, electrical PPE and arc have the same potential impact to the environment. Trane flash clothing). ALWAYS refer to appropriate advocates the responsible handling of all refrigerants.
  • Page 3 This document and the information in it are the property of regulations. Trane, and may not be used or reproduced in whole or in part without written permission. Trane reserves the right to revise this publication at any time, and to make changes to...
  • Page 4 Table of Contents General Information ......6 Leak Detection System(Refrigerant charge greater than 3.91 lb per circuit) ..26 Overview of Manual .
  • Page 5 Table of Contents Water Coil Piping ......46 Coil-Related Checks....64 Motor-Related Checks .
  • Page 6 For more information, refer to the following documents, Do not operate units with electric heat below the minimum available from your local Trane sales engineer: airflow listed (see Table 12, p. 56). This is to prevent •...
  • Page 7 The fan motor nameplate includes a wiring diagram. If there are any questions concerning the wiring of the motor, write down the information on the motor nameplate and contact your local Trane sales office. CLCH-SVX017A-EN...
  • Page 8 Model Number Description Digit 1, 2, 3, 4 — Product Group Digit 12 — Coil, Drain Pan and Motor Digit 14 — Unit Coil #2 Second in Airstream UCCA = Performance Climate Changer R = Polymer drain pan, RH coil/RH motor 0 = No unit coil #2 L = Polymer drain pan, LH coil/LH motor A = 1 row reheat hydronic coil/9 fpi...
  • Page 9 Model Number Description Digit 17 — Electric Heat/Factory Mounted Digit 21 — Electric Heat Options Digit 25 — Drives Only 0 = No electric heat 0 = No drive 0 = No electric heat A = Line fuse, door interlocking disconnect switch A = 650 rpm fixed/600-700 variable 1 = Electric heat with 1 stage and airflow switch...
  • Page 10 Model Number Description Digit 26, 27 —VFD setting/DDP Fan Speed Digit 28 — Filter/Mixing/Return Section Digit 35 — Access Section with Optional Coil (continued) 0 = None 0 = No access section 81 = 81 Hz/2406 rpm A = 2 in. flat filter rack 1 = Access section without coil 82 = 82 Hz/2435 rpm B = 2 in.
  • Page 11 See the Receiving Checklist section below for detailed instructions. ☐ Notify your Trane sales representative of the damage and arrange for repair. Do not attempt to repair the unit Note: Delivery cannot be refused. All units are shipped F.O.
  • Page 12 Pre-Installation • Cover the unit securely with a canvas tarp. • Confirm the roof curb, floor, or foundation of the mounting platform is level and large enough to • Do not stack units. accommodate the unit. Refer to the unit submittals for •...
  • Page 13 Pre-Installation 3. Remove any twist within the curb due to roof supports 9. Install field supplied flashing under the lip of the curb and square the curb. flanges and over the felt. 4. Level the curb. 10. Apply sealant to the four corners. 5.
  • Page 14 Dimensions and Weights Installation Clearances Table 1. Electric heat requirements (continued) (Electric Heat) Minimum Clearance to Combustible Materials Electric Heat (inch) Model Table 1. Electric heat requirements FC Fan VFD Minimum Clearance to Combustible Materials (first four feet of duct) Electric Heat (inch) Model...
  • Page 15 Dimensions and Weights Table 2. Service clearance dimensions (inches) for indoor units Unit Size Component Filter 40.00 44.00 42.00 42.00 40.00 45.00 45.00 45.00 51.00 51.00 Coil Pull 49.00 62.00 66.00 78.00 86.00 86.00 94.00 94.00 96.00 109.00 Fan Access, horizontal unit (motor 48.00 48.00 48.00...
  • Page 16 Dimensions and Weights Figure 3. Service clearances for outdoor units Electric Coil Coil Hood Heat Control Box Mixing Box / Dischage Plenum Filter Pipe Cabinet Table 3. Service clearance dimensions (inches for outdoor units) Unit Sizes Component Coil Pull 49.00 62.00 66.00 78.00...
  • Page 17 Dimensions and Weights Table 4. Performance air handler model UCCA dimensions (inches) Nom airflow (CFM) 1500 3000 4000 5000 6000 7000 3500 10,500 12,500 15000 Unit Size Indoor units Horizontal unit height 27.50 32.50 38.00 38.00 41.75 45.57 48.07 54.32 60.57 60.57 Horizontal unit width...
  • Page 18 Dimensions and Weights Table 4. Performance air handler model UCCA dimensions (inches) (continued) Nom airflow (CFM) 1500 3000 4000 5000 6000 7000 3500 10,500 12,500 15000 Unit Size Velocity (FPM) Weight (lb.) Fan/Motor data FC fans Wheel size (in.) 12x9 12x12 15x15 18x15...
  • Page 19 Dimensions and Weights Table 4. Performance air handler model UCCA dimensions (inches) (continued) Nom airflow (CFM) 1500 3000 4000 5000 6000 7000 3500 10,500 12,500 15000 Unit Size Nominal Velocity (fpm) 1166.90 1224.70 1288.50 1205.60 1178.00 1239.20 1217.00 1277.90 1208.10 1247.10 Notes: Hydronic coil weight based on 14 fins per inch.
  • Page 20 Dimensions and Weights Table 7. VFD Weights (pounds) and line input VFD (single Fan) VFD (dual Fan) Type Line Input Weight Line Input Weight 200 V / 60 Hz / 3 PH 3.50 1800 4.20 230 V / 60 Hz / 3 PH 3.00 1800 4.20...
  • Page 21 • To be repaired only by trained service At all times, Trane’s maintenance and service guidelines shall be followed. If in doubt, contact Trane technical personnel. support for assistance. • Do not puncture refrigerant tubing.
  • Page 22 • Verify continuity of earth bonding. 5. Continuously flush or purge with inert gas when using • Replace electrical components with Trane replacement flame to open circuit. parts, or those meeting the same ratings and qualified 6. Open the circuit.
  • Page 23 A2L Information • Ensure that contamination of different refrigerants does 8. Do not overfill cylinders (no more than 80% volume not occur when using charging equipment. liquid charge). • Hoses or lines shall be as short as possible to minimize 9.
  • Page 24 A2L Information Ignition Sources in Unit adjusted A threshold. This product contains a leak detection system if a circuit charge is greater than 3.91 This unit does not contain any ignition sources. All potential lbs. As a result, no further leak detection system ignition sources, (including factory or field installed evaluation is needed.
  • Page 25 A2L Information Figure 5. Charge vs min room area (SI) Charge vs Min Room Area (SI) 280.0 260.0 Release Height-0.6m 240.0 Release Height-1.0m Release Height-1.4m 220.0 Release Height-1.8m Release Height-2.2m 200.0 180.0 160.0 140.0 120.0 100.0 80.0 60.0 40.0 20.0 10.0 12.0 14.0...
  • Page 26 A2L Information of refrigerant with a minimum room area requirement of mechanical ventilation system meets the requirements of 180 ft with a 2.2 m release height. ANSI\ASHRAE Standard 15-2022, Section 7.6.4. Leak Detection System = 180 ft x 1.05 x 2 = 378 ft min.adj (Refrigerant charge greater than 3.91 lb No additional ventilation is required.
  • Page 27 Installation - Mechanical Important: Verify installation location meets requirements Figure 7. Shipping tie-down removal for horizontal FC fan 3 to 10 - remove bracket shown in “Installation Clearances (Electric Heat),” p. Lifting and Rigging Remove Shipping Tie-Downs Prior to unit placement, remove the shipping tie-downs. Figure 6, p.
  • Page 28 Installation - Mechanical Figure 9. Shipping tie-down removal for vertical FC Figure 11. Shipping tie-down removal for DDP fan fan 3 to 10 - remove brackets Detail C Detail C Skid Removal for Indoor Units FC Fan Size 12 to 30 NOTICE 1.
  • Page 29 Installation - Mechanical General Lifting Considerations Lifting Indoor Units WARNING WARNING Risk of Unit Dropping! Heavy Objects! Placing, assembling, and/or suspending more than Failure to follow instructions below or properly lift one module/subassembly at a time could result in unit could result in unit dropping and possibly module/subassemblies dropping and crushing crushing operator/technician which could result in technicians which could result in death, serious...
  • Page 30 Installation - Mechanical Figure 13. Hoist indoor units with slings and spreader Figure 15. Lifting detail for unit sizes 3 to 30 bars Rigging and spreader bars furnished by others Spreader bar • To lift unit with forklift, extend the forks under both ends Figure 14.
  • Page 31 Installation - Mechanical Figure 17. Fork lift points with optional baserail Figure 19. Lifting lug detail Rigging and spreader bars furnished by others Lifting Outdoor Units • Never stack the pipe cabinet or inlet hoods on the unit Note: For outdoor air handlers, preparation of the roof curb as it is being lifted.
  • Page 32 Installation - Mechanical Unit Placement Figure 21. Lifting pipe cabinet NOTICE Microbial Growth! Failure to follow instructions below could result in odors and damage to the equipment and building materials. Wet interior unit insulation can become an amplification site for microbial growth (mold). If there is evidence of microbial growth on the interior insulation, it should be removed and replaced prior to operating the system.
  • Page 33 Installation - Mechanical Ceiling Suspension for Indoor Units ceilingsuspended mounting frame designed to support the length, width, and weight of the entire air-handling unit. See WARNING the Dimensions and Weights chapter for approximate weights. Risk of Unit Dropping! Note: It is the building engineer’s responsibility to size the Improper use of the tie down brackets could result in structural channels and to provide the appropriate unit dropping and crushing technicians which could...
  • Page 34 Installation - Mechanical Figure 25. Ceiling suspension for unit sizes 3 to 30 Hole diameter is 0.625 inches • Bolt the shipping splits together. Figure 26. Bring sections close, remove strap channels. • Ensure that the hanger rods extend through the bottom of the base lug.
  • Page 35 Installation - Mechanical Figure 27. Joining mixing, return, and other accessories section to unit with second level fan Final assembly with screws removed Remove Bottom Two Screws: 0.250 - 10 x 3 hex washer head tapping Fan Removal 3. Slide the sections together so the side flanges overlap the main section.
  • Page 36 Installation - Mechanical Figure 29. Remove screws, install lifting lugs Figure 30. Use spreader bars to lift top unit (1) Lifting lug # LUG00180 Temporarily use for lifting second level. (2) Screw: 0.313 - 18 x 0.875 sheet metal (3) Screw: (1) Lifting lug 0.250 - 14 x 0.750 #LUG00180...
  • Page 37 Installation - Mechanical Note: If unit is equipped with a control interface, VFD or Figure 32. Unit set perpendicular to roof curb members electric heat, disconnect electrical wiring. Wiring between fan motor and contactor or VFD can be Auxillary support Roof mounting curb loaded under curbs inside edge...
  • Page 38 If there are any discrepancies between the submittals and the unit tagging, contact your Remove screws local Trane representative before proceeding. (outside the pipe cabinet) Following the order of the sections on the unit submittals and tagging, individually place each unassembled section 4.
  • Page 39 Installation - Mechanical Weather Hoods 7. Maker sure there is a gap between pipe cabinet and bottom deflectors. 1. Remove shipping protection plastic film from the hood. 2. Per the unit drawing, determine mounting locations of the unit weather hoods. 3.
  • Page 40 Installation - Mechanical Filter Placement Figure 37. Flat filter arrangement Size 8 Size 10 Size 6 8.90 ft² Size 3 11.10 ft² 6.90 ft² 3.50 ft² 7.00 9.00 3.00 2.00 2.00 5.00 3.50 3.50 34.00 34.00 28.50 23.50 43.00 47.00 59.00 30.00 Size 14...
  • Page 41 Installation - Mechanical Figure 38. Angle filter arrangement Size 3 Size 6 Size 8 Size 10 15.60 ft² 5.60 ft² 11.10 ft² 12.50 ft² 2.00 3.00 3.00 5.00 30.00 43.00 47.00 59.00 Size 17 30.00 ft² Size 12 Size 14 3.00 21.70 ft²...
  • Page 42 Installation - Mechanical Field Conversions 6. Loosen bolts securing sliding motor base in place and loosen nuts on belt tensioning j-bolt. Fan Discharge Conversion for Indoor Air 7. Remove V-belt(s). Handlers 8. Detach fan from the isobase and rotate to the desired discharge position.
  • Page 43 Installation - Mechanical Figure 41. Contact service parts for angle/gasket kit Figure 43. Isolator adjustment for unit size 10 Required clearance Figure 44. Isolator adjustment for unit size 12 to 30 15. Reattach front/back panels. 16. Reattach access doors and side panels. 17.
  • Page 44 Pitch the connection lines from infiltrating the insulation. horizontal or downward toward an open drain. Trane recommends installing a plug to facilitate cleaning of the trap. See the table below for drain connection sizes.
  • Page 45 Coil Piping and Connections Figure 45. Drain pan trapping for negative and positive pressure applications Section under negative pressure Section under positive pressure L = H + J + pipe diameter where: L = H + J + pipe diameter where: H = 1 inch for each inch of negative H = 1/2 inch (minimum) pressure plus 1 inch with loaded filters...
  • Page 46 1. Install an air vent in the top pipe plug tapping of the modulated and is 25 psig or higher. return header. Note: Trane steam coils require a minimum of 2 psi 2. When the return line rises above the top of the coil, vent of pressure to assure even heat distribution.
  • Page 47 Coil Piping and Connections Figure 47. Typical piping for one-row water coil Drain Figure 48. Typical piping for 2 - 8-row water coils Drain Refrigerant Coil Piping relative sequence of the components in the refrigerant lines that connect the condensing unit to an evaporator coil. Note: Refer to for information on handling refrigerants.
  • Page 48 Coil Piping and Connections Figure 49. Example of placement for split-system components Access port Manual Discharge ball valve Filter line Manual Access angle valves port Manual Compressors ball valve Liquid line Check/relief valve Condensing unit King valve access port Expansion Coil section valves Solenoid...
  • Page 49 Venturi type the refrigerant from the evaporator during the off distributor cycles. Trim solenoids cannot be used with MCHE. Note: Trane condensing units with MCHE no longer employ pump-down, but isolation solenoids are Coil required. The suggested solenoid uses a 120- volt service and requires code-compliant wiring •...
  • Page 50 Trane now has many years of experience in the successful Components use of equipment without hot gas bypass in commercial comfort-cooling applications. To prevent evaporator freeze- Installing the suction line requires field installation of these up, Trane equipment typically includes Frostat™...
  • Page 51 R-410A, please contact your local with the pressures of an R-410A system, and for their Trane representative. compatibility with the newer POE oil. • For the best performance and operation, the original...
  • Page 52 Coil Piping and Connections Field-Installed Evaporator Piping Examples 1. Pitch the liquid line slightly –1 inch/10 feet – so Figure 51. Typical single-circuit condensing unit: evaporator coil that the refrigerant drains toward the with one distributor evaporator. Evaporator Coil with Standard Circuiting 2.
  • Page 53 Coil Piping and Connections 1. Pitch the liquid line slightly – 1 in./10 feet – so Figure 53. Typical single-circuit condensing unit: evaporator coil that the refrigerant drains toward the with four distributors evaporator. Evaporator Coil with Horizontal-Split 2. Provide one expansion valve per distributor. (Standard) Circuiting 3.
  • Page 54 Coil Piping and Connections 1. Pitch the liquid line slightly – 1 in./10 feet – so Figure 55. Typical dual-circuit condensing unit: evaporator coil that the refrigerant drains toward the evaporator. with four distributors 2. Provide one expansion valve per distributor. Evaporator Coil 3.
  • Page 55 Properly connect the system’s oversized protective or other energy storing components provided by earthing (grounding) terminal(s). Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods NOTICE for discharge of capacitors. Verify with a CAT III or IV...
  • Page 56 Installation - Electrical a ground wire at the supply transformer to control panel Figure 57. Interface power requirements chassis, or an installer supplied ground. Note: Do not connect any sensor or input circuit to an Line 24 Vac external ground connection. voltage Termination board The installer must provide interconnection wiring to connect...
  • Page 57 Installation - Electrical VFD Wiring Schematic Typical wiring schematic for a VFD is shown in the figure below. Unit specific wiring schematics are shipped with each unit. CLCH-SVX017A-EN...
  • Page 58 DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN HIGH VOLTAGE CONSENT OF TRANE FINISH SINGLE MOTOR, VFD, NO ELECTRIC HEAT DRAWN BY: K. GRIGSBY...
  • Page 59 DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN HIGH VOLTAGE CONSENT OF TRANE FINISH SINGLE MOTOR, VFD, NO ELECTRIC HEAT DRAWN BY: K. GRIGSBY...
  • Page 60 DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN HIGH VOLTAGE CONSENT OF TRANE FINISH DUAL MOTOR, VFD, NO ELECTRIC HEAT DRAWN BY: K. GRIGSBY...
  • Page 61 DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN HIGH VOLTAGE CONSENT OF TRANE FINISH DUAL MOTOR, VFD, NO ELECTRIC HEAT DRAWN BY: K. GRIGSBY...
  • Page 62 DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN HIGH VOLTAGE CONSENT OF TRANE FINISH SINGLE MOTOR, NO VFD, NO ELECTRIC HEAT DRAWN BY: K. GRIGSBY...
  • Page 63 DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN HIGH VOLTAGE CONSENT OF TRANE FINISH SINGLE MOTOR, NO VFD, NO ELECTRIC HEAT DRAWN BY: K. GRIGSBY...
  • Page 64 NOTICE or other energy storing components provided by Proper Water Treatment Required! Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods The use of untreated or improperly treated water for discharge of capacitors. Verify with a CAT III or IV...
  • Page 65 VFD Programming Parameters WARNING Units shipped with an optional variable frequency drive (VFD) are preset and run-tested at the Trane factory. If a Rotating Components! problem with a VFD occurs, ensure that the programmed Failure to disconnect power before servicing could parameters listed in Table 17, p.
  • Page 66 For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.
  • Page 67 Start-Up Table 17. Trane TR150 VFD programming parameters (continued) Description Factory Default Trane Setting Parameter # TR150 6 to 14 Terminal 53 Low Ref Feedback 0.0 Hz 20 Hz 60 or the Value of Maximum Inverter Terminal 53 High Ref Feedback...
  • Page 68 Start-Up Figure 66. Belt tension measurement Belt Span Deflection = Belt Span Table 18. Typical sheave diameter and deflection force Belt Deflection Force (lbs) Smallest Super gripbelts and unnotched Gripnotch belts and notched gripbands sheave gripbands diameter range Cross (in.) Speed (rpm) range Section Used belt...
  • Page 69 Start-Up Table 18. Typical sheave diameter and deflection force (continued) Belt Deflection Force (lbs) Smallest Super gripbelts and unnotched Gripnotch belts and notched gripbands sheave gripbands diameter range Cross (in.) Speed (rpm) range Section Used belt New belt Used belt New belt 1,000 to 2,500 2.2 to 2.4...
  • Page 70 Start-Up Figure 67. Proper drive alignment Center line Lines must must coincide be parallel Fixed sheave Fixed sheave Straight edge Adjustable sheave Table 19. Set screw torque settings (inches) Screw Size Hex Key Square Head Hex Head Torque (in.-lb.) Torque (ft.-lb.) 7/16 66 to 90 5.5 to 7.5...
  • Page 71 Routine Maintenance WARNING WARNING Hazardous Service Procedures! Rotating Components! Failure to follow all precautions in this manual and on Failure to secure rotor or disconnect power before the tags, stickers, and labels could result in death or servicing could result in rotating components cutting serious injury.
  • Page 72 Materials Safety Data Sheet and follow prevent air bypass. If using filters not supplied by all recommended safe handling practices. Trane, apply foam gasketing to the vertical edges of the filter. To clean steam and water coils: 1. Disconnect all electrical power to the unit.
  • Page 73 Routine Maintenance Figure 68. Gain access to both sides of coil shown for sizes 3, 6, 10, and 12 For unit sizes 8, 14, 17, 21, 25, and 30, see Figure 69, p. Figure 69. Gain access to both sides of coil shown for sizes 8, 14, 17, 21, 25, and 30 Access panel can now be removed...
  • Page 74 Routine Maintenance Figure 70. For vertical MI fan, gain access via the coil 13. Replace all panels and parts and restore electrical door power to the unit. 14. Be careful any contaminated material does not contact other areas of the unit or building. Properly dispose of all contaminated materials.
  • Page 75 Trane recommends flushing the coil with glycol if coils will happen to form. This simple preventative measure be exposed to temperatures below 35 degrees.
  • Page 76 Routine Maintenance The condensate drain pan and drain line must be checked 8. Tighten the set screw to the drive shaft. to assure the condensate drains as designed. This 9. Stretch the belt over the pulley and engage it in the inspection should occur a minimum of every six months or groove.
  • Page 77 Routine Maintenance Figure 72. Resetting low limit switch for vertical units • Horizontal units equipped with a direct-drive plenum fan, the low limit switch can be accessed through the fan access door. For sizes 3, 6, 10 and 12, see Figure 74, p.
  • Page 78 Routine Maintenance Figure 74. Resetting low limit switch for horizontal DDP fan units sizes 3, 6, 10, and 12 Removable access panel Panel removed from unit Screw: 10-16 x 0.750 self-driller Remove all from perimeter panel Detail A Low limit freeze stat For unit sizes 8 and 14 to 30, see Figure 75, p.
  • Page 79 Routine Maintenance Fans 4. Thoroughly clean any contaminated area(s) with a mild bleach and water solution or an EPA-approved sanitizer WARNING specifically designed for HVAC use. Rotating Components! 5. Immediately rinse the affected surfaces thoroughly with fresh water and a fresh sponge to prevent potential Failure to secure rotor or disconnect power before corrosion of metal surfaces.
  • Page 80 Routine Maintenance Table 21. Minimum hex head bolt torque in lb.-ft. Table 22. Compatible greases (Grade 5 bolts) Type Size (inches) Thread Minimum Torque Texaco Multi Fak 2 Designation Shell Alvania 2 1/4 to 20 Mobil 532 1/4 to 28 Chevron Dura-Lith 2 65/16 to 18 Exxon Beacon...
  • Page 81 Routine Maintenance bristle brush to clean bulky debris off exterior of eliminator. The spray should penetrate through the eliminator Use a garden hose or pressure washer from inside the unit, completely. spray water toward the outside surface of the eliminator. CLCH-SVX017A-EN...
  • Page 82 Troubleshooting This section is intended to be used as a diagnostic aid only. WARNING For detailed repair procedures, contact your local Trane Hazardous Service Procedures! service representative. Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or serious injury.
  • Page 83 Troubleshooting Table 24. Air handler troubleshooting recommendations (continued) Symptom Probable Cause Recommended Action Low voltage at motor terminals Check across AC line and correct voltage loss if possible. Motor does not come up to speed Line wiring to motor too small Replace with larger sized wiring.
  • Page 84 Troubleshooting Table 24. Air handler troubleshooting recommendations (continued) Symptom Probable Cause Recommended Action Incorrect airflow Check fan operating condition. Check sensing bulb temperature. Expansion valve is not operating properly or is sized incorrectly Verify valve operation. Verify proper valve size. Incorrect refrigerant charge Verify refrigerant charge and adjust if necessary.
  • Page 85 Notes CLCH-SVX017A-EN...
  • Page 86 Notes CLCH-SVX017A-EN...
  • Page 87 Notes CLCH-SVX017A-EN...
  • Page 88 For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.