1. Manuals
  2. Brands
  3. Trane Technologies Manuals
  4. Air Handlers
  5. Climate Changer UCCA
  6. Installation, operation and maintenance manual

Trane Technologies Climate Changer UCCA Installation, Operation And Maintenance Manual

Performance air handler for indoor and outdoor applications
Hide thumbs
Table of Contents

Advertisement

Quick Links

Installation, Operation and Maintenance
Performance Climate Changer™ Air
Handler
Model UCCA for Indoor and Out-
door Applications
Electric
Heat
Control Box
VFD
Discharge Plenum
Sizes 3 to 30
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.
March 2020
Coil
Coil
Fan
Pipe Cabinet
SAFETY WARNING
CLCH-SVX009J-EN
Hood
Economizer/
Filter
Hood
Hood
Mixing Box / Filter
X-39641253010

Advertisement

Table of Contents
loading
Need help?

Need help?

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

Questions and answers

Related Manuals for Trane Technologies Climate Changer UCCA

Summary of Contents for Trane Technologies Climate Changer UCCA

  • Page 1 Installation, Operation and Maintenance Performance Climate Changer™ Air Handler Model UCCA for Indoor and Out- door Applications Hood Economizer/ Filter Electric Coil Coil Heat Hood Control Box Discharge Plenum Hood Mixing Box / Filter Pipe Cabinet Sizes 3 to 30 SAFETY WARNING Only qualified personnel should install and service the equipment.
  • Page 2 Introduction Read this manual thoroughly before operating or servicing this unit. WARNING Proper Field Wiring and Grounding Warnings, Cautions, and Notices Required! Safety advisories appear throughout this manual as Failure to follow code could result in death or serious required. Your personal safety and the proper operation of injury.
  • Page 3 Introduction WARNING Follow EHS Policies! Failure to follow instructions below could result in death or serious injury. • All Trane personnel must follow the company’s Environmental, Health and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc.

  • Page 4: Table Of Contents

    Table of Contents Introduction Unit Operation ......5 ......60 Overview of Manual External Insulating Requirements .

  • Page 5: Introduction

    Introduction Overview of Manual identifies the type of section and functional components, customer tagging information, the unit serial number, the unit order number, the build-section position for Use this manual to install, startup, operate, and maintain installation, and the unit model number. the Performance Climate Changer™...

  • Page 6: General Information

    General Information Operating Environment Unit Description The Performance Climate Changer™ air handler is a The Performance air handler model UCCA is designed for central station air handler for indoor and outdoor budget-conscience applications, but does not sacrifice on applications. When considering the placement of the air construction, quality, or performance.

  • Page 7: Control Solutions

    General Information Control Solutions Performance air handlers are available with an optional Wiring control interface. This package can be used as part of a stand-alone operation, or it can be fully integrated into a WARNING comprehensive control system. The Trane EarthWise™ system incorporates the benefits of factory-installed Proper Field Wiring and Grounding controls and links the air handler to the Tracer®...

  • Page 8: Model Number Descriptions

    Model Number Descriptions Digit 1, 2, 3, 4— Product Group Stainless steel drain pan, RH coil/ Digit 15 - Coil options RH motor UCCA = Performance Climate Changer No coil option Stainless steel drain pan, LH coil/ Aluminum fin with galvanized Digit 5 - Configuration LH motor casing, 1/2 in.
  • Page 9 Model Number Descriptions 030 = 30.0 kW 10 hp (7.460 kW) Digit 26, 27 - VFD setting/DDP 032 = 32.0 kW 15 hp (11.190 kW) fan speed 034 = 34.0 kW Motorized impeller fan 00 = Housed/MI fans 036 = 36.0 kW Special 54 = 54 Hz/1604 rpm...
  • Page 10 Model Number Descriptions C3 = 62 Hz/3565 rpm 2 in. flat filter with back Digit 35 - Access section with C4 = 63 Hz/3623 rpm return optional coil C5 = 64 Hz/3680 rpm 2 in. angle filter with back No access section C6 = 65 Hz/3738 rpm return...

  • Page 11: Pre-Installation

    Pre-Installation Receiving and Handling  Check all units, components, connections, and piping. Check fan wheel for free rotation by spinning Inspection manually. Check all doors, latches and hinges. Inspect interior of each unit or section. Inspect coils for Upon delivery, thoroughly inspect all components for any damage to fin surface and coil connections.

  • Page 12: Site Preparation

    Pre-Installation Outdoor Storage • Allow room for supply and return piping, ductwork, electrical connections, and coil removal. • Ensure there is adequate height for condensate drain NOTICE requirements. See “Drain Pan Trapping,” p. Corrosion! Note: If unit is installed in a mechanical room on a pad, Use only canvas tarps to cover air handlers.

  • Page 13: Roof Curb Installation Checklist

    Pre-Installation Roof Curb Installation Checklist See CLCH-SVN-006*-EN Performance Climate Changer Air Handler Model UCCA Roof Curb Installation for information on installing roof curbs. It is recommended that the curb be installed directly on the support members and fastened to the supports using tack welds or other equivalent methods.

  • Page 14: Dimensions And Weights

    Dimensions and Weights Service Clearances Figure 3. Service clearances for indoor units Unit Coil/Access Mixing Box / Filter Economizer / Filter Filter Coil Coil Electric Heat Control Box Table 1. Service clearance dimensions (inches) for indoor units Unit Size Component Filter 40.00 44.00...
  • Page 15 Dimensions and Weights Figure 4. Service clearances for outdoor units Hood Economizer/ Filter Electric Coil Coil Heat Hood Control Box Discharge Plenum Hood Pipe Cabinet Table 2. Service clearance dimensions (inches for outdoor units) Unit Sizes Component Coil Pull 49.00 62.00 66.00 78.00...
  • Page 16 Dimensions and Weights Table 3. Performance air handler model UCCA dimensions (inches) 1500 3000 4000 5000 6000 7000 3500 10,500 12,500 15,000 Nom airflow (CFM) 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 17 Dimensions and Weights Table 3. Performance air handler model UCCA dimensions (inches) (continued) 1500 3000 4000 5000 6000 7000 3500 10500 12500 15000 Nom airflow (CFM) Unit size Fan/Motor data FC fans Wheel size (in.) 12x9 12x12 15x15 18x15 18x18 20x15 20x20 20x18...

  • Page 18: Fans

    Dimensions and Weights Fans Table 4. Fan weights (pounds) Supply Fan Supply Fan Return Fan Motorized Motorized Indoor Return Fan Unit Supply Fan Supply Fan Motorized Impeller(b) Impeller(b) Motorized Size FC Fan Fan(a) Impeller Fan (Std TSP) (High TSP) Impeller(b) 30.71 60.63 57.00...

  • Page 19: Controls

    Dimensions and Weights Controls All controls boxes and starters weigh 15 pounds. Table 6. 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...

  • Page 20: Installation - Mechanical

    Installation - Mechanical Lifting and Rigging Vertical FC Fan 3-10 1. Remove screws attaching shipping protection brackets Remove Shipping Tie-Downs from center of isolation base to casing mounting bracket. Prior to unit placement, remove the shipping tie-downs. Figure 5 thru Figure Figure 7.
  • Page 21 Installation - Mechanical FC Fan Size 12-30 Skid Removal for Indoor Units 1. Remove drive side screws on isolator brackets NOTICE 2. Cut banding and remove Equipment Damage! Figure 9. Shipping tie-down removal for FC fan 12-30 Premature skid removal could result in equipment damage.
  • Page 22 Installation - Mechanical General Lifting Considerations Figure 12. Hoist indoor units with slings and spreader bars WARNING Risk of Unit Dropping! Spreader bar Failure to follow instruction below could result in death or serious injury. To prevent modules/subassemblies from dropping, ALWAYS place, assemble, and suspend them one at a time.
  • Page 23 Installation - Mechanical Figure 14. Lifting detail for unit sizes 3 to 30 Rigging and spreader bars furnished by others Lifting Outdoor Units Note: For outdoor air handlers, preparation of the roof curb or pier mount and roof openings must be completed before lifting to the roof.

  • Page 24: Unit Placement And Assembly For Indoor Air Handlers

    Installation - Mechanical Figure 19. Lifting exhaust hood Figure 18. Lifting lug detail Rigging and spreader bars furnished by others Figure 20. Lifting pipe cabinet • Never stack the pipe cabinet or inlet hoods on the unit as it is being lifted. •...
  • Page 25 Installation - Mechanical Figure 21. Tie downs can be used to tie down to floor WARNING Toxic Fumes! Keep open flame away from unit exterior or interior. Do not weld or use cutting torch on the exterior or interior of the unit. The unit contains polyurethane insulation. Flame could produce toxic gas which could result in death or serious injury.
  • Page 26 Installation - Mechanical • For parallel-to-airflow channels, size channels based • For perpendicular-to-airflow channels, size channels on a four-point load distribution. based on the load distribution of the individual sections and install the channels so that both ends of every section are supported. Figure 23.
  • Page 27 Installation - Mechanical Figure 24. Ceiling suspension for unit sizes 3 to 30 Hole diameter is 0.625 inches • Bolt the shipping splits together. Figure 25. Bring sections close, remove strap channels. • Ensure that the hanger rods extend through the bottom of the base lug.
  • Page 28 Installation - Mechanical If the unit has a second level fan, it is necessary to remove the screws, as shown in the figure below, before joining the mixing or filter section to the coil section. Figure 26. Joining mixing, return, and other accessories section to unit with second level fan Final assembly with screws removed Remove Bottom Two Screws:...
  • Page 29 Installation - Mechanical Figure 28. Remove screws, install lifting lugs Figure 29. 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 (1) Lifting lug #LUG00180 (3) Screw: Temporarily use for...

  • Page 30: Unit Placement And Assembly For Outdoor Air Handlers

    Installation - Mechanical wiring should be disconnected from switch in When mounting the unit on its roof curb, make sure that control interface box. Any controls low voltage end the gasketing between the roof curb and unit base devices located in second level fan portion should provides an airtight seal.
  • Page 31 Installation - Mechanical Pipe Cabinets For outdoor units, the pipe cabinet must be mounted as an Butyl tape must individual section. contact gasket 1. Remove trim angle and roof hook from the inner side Butyl tape of the pipe cabinet side wall. Remove screws (outside the pipe cabinet) 4.
  • Page 32 Installation - Mechanical Figure 34. Attach roof hook Pipe Unit roof 1/4 in. screws cabinet Unit overhang 1 5/8-in. ± 1/8-in. gap between pipe cabinet Roof hook and horizontal deflector 7. Maker sure there is a gap between pipe cabinet and bottom deflectors.
  • Page 33 Installation - Mechanical Figure 36. Intake hood installation Screw self-drille 0.250-14 x 0.7 Intake hoods Butyl caulk tape 1.00W x 0.125T Butyl caulk tape 1.00W x 0.125T CLCH-SVX009J-EN...
  • Page 34 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 30.00 43.00 47.00 59.00 Size 14...

  • Page 35: Duct Connections

    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 36: Field Conversions

    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 37 Installation - Mechanical 14. The duct extensions do not extend as far and do not Figure 43. Isolator adjustment for unit size 10 reach the cabinet panel. The gap is bridged by a flexible foam gasket. Contact Service Parts for angle/gasket ki Figure 41.

  • Page 38: Coil Piping And Connections

    Coil Piping and Connections • When attaching the piping to the coil header, make the NOTICE connection only tight enough to prevent leaks. Maximum recommended torque is 200 foot-pounds. Connection Leaks! • Use pipe sealer on all thread connections. Use a backup wrench when attaching piping to coils •...

  • Page 39: Steam Coil Piping

    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...
  • Page 40 Coil Piping and Connections Proper steam trap installation is necessary for satisfactory NOTICE coil performance and service life. For steam trap installation: Breaker Cracking Pressure! 1. Install the steam trap discharge 12 inches below the Failure to follow these instructions could result in condensate return connection.
  • Page 41 Coil Piping and Connections Water Coil Piping is below these minimums, vent the coil by one of the following methods: Figure 47 Figure 48 illustrate typical water coil piping 1. Install an air vent in the top pipe plug tapping of the configurations.
  • Page 42 Coil Piping and Connections Refrigerant Coil Piping Figure 49 illustrates an example of a split-system component arrangement. Use it to determine the proper, relative sequence of the components in the refrigerant Note: Refer to for information on handling refrigerants. lines that connect the condensing unit to an evaporator coil.
  • Page 43 Coil Piping and Connections Liquid Lines service and requires code-compliant wiring to the condensing unit. Line Sizing • Moisture-indicating sight glass. Be sure to install one moisture-indicating sight glass in the main liquid line. Properly sizing the liquid line is critical to a successful split- The only value of the sight glass is its moisture system application.

  • Page 44: Suction Lines

    Coil Piping and Connections Suction Lines • Access port: The access port is used to determine suction pressure. This port is usually a Schraeder valve with a core. Line sizing • Frostat™ coil frost protection: The Frostat control is the Proper line sizing is required to guarantee the oil returns to preferred method for protecting evaporator coils from the compressor throughout the system’s operating...

  • Page 45: Remodel, Retrofit, Or Replacement

    Coil Piping and Connections Systems should be designed to avoid HGBP whenever • The required R-410A line sizes may be different than possible. For more information about HGBP, refer to the the existing line sizes. The lines need to be re-sized and Engineers Newsletter, “Hot Gas Bypass –...

  • Page 46: Field-Installed Evaporator Piping Examples

    Coil Piping and Connections Field-Installed Evaporator Piping Examples Figure 51. Single-circuit condensing unit: evaporator coil with one distributor Evaporator Coil with Standard Circuiting Suction line Liquid line Sight glass Thermal Solenoid Filter drier expansion valve valve (TXV) Distributor 1. Pitch the liquid line slightly—1 inch/10 feet —so that the refrigerant drains toward the evaporator.
  • Page 47 Coil Piping and Connections Figure 52. Single-circuit condensing unit: evaporator coil with two distributors 1. Pitch the liquid line slightly—1 inch/10 feet —so Evaporator Coil with Horizontal-Split the refrigerant drains toward the evaporator. Suction line (Standard) Circuiting 2. Provide one expansion valve per distributor. “Trim”...
  • Page 48 Coil Piping and Connections Figure 53. Single-circuit condensing unit: evaporator coil with four distributors 1. Pitch the liquid line slightly—1 in./10 feet —so Evaporator Coil with Horizontal-Split (Standard) Circuiting that the refrigerant drains toward the evaporator. Suction line Thermal expansion valves (TXV) 2.
  • Page 49 Coil Piping and Connections Figure 54. Dual-circuit condensing unit: evaporator coil with two distributors Evaporator Coil Suction line with Horizontal-Split (Standard) Circuiting (circuit 2) Liquid line (circuit 2) Sight glass Solenoid Distributor valve Suction line (circuit 1) Liquid line (circuit 1) Thermal Filter drier expansion...
  • Page 50 Coil Piping and Connections Figure 55. Dual-circuit condensing unit: evaporator coil with four distributors 1. Pitch the liquid line slightly—1 in./10 feet —so Evaporator Coil with Horizontal-Split (Standard) Circuiting that the refrigerant drains toward the Suction line evaporator. (circuit 2) Liquid line Thermal expansion 2.

  • Page 51: Electrical Requirements

    Electrical Requirements Unit Wiring Diagrams For the electric heat or unit control box, connect the three phase wire to the power terminal block. Specific unit wiring diagrams are provided on the inside of For the return fan, connect the three phase wires to the the control panel door.
  • Page 52 Electrical Requirements Important recommendation Table 11. Electric heat voltage ratings Do not bundle or run interconnection wiring in parallel Unit Voltage Heater Voltage with or in the same conduit with any high-voltage wires (110 V or greater). Exposure of interconnection wiring to high-voltage wiring, inductive loads, or RF transmitters may cause radio frequency interference (RFI).
  • Page 53 Electrical Requirements VFD Wiring Schematic Typical wiring schematic for a VFD is shown in the figure below. Unit specific wiring schematics are shipped with each unit. Figure 58. Typical VFD wiring schematic for indoor air handlers UNLESS OTHERWISE SPECIFIED ALL TRANE 196001380003 SHEET...
  • Page 54 Electrical Requirements Figure 59. Typical VFD wiring schematic for outdoor air handlers TRANE UNLESS OTHERWISE SPECIFIED ALL 196006950001 SHEET DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF TRANE HIGH VOLTAGE FINISH...
  • Page 55 Electrical Requirements Figure 60. Typical dual fan VFD wiring schematic - indoor air handler only TRANE UNLESS OTHERWISE SPECIFIED ALL 196001380005 SHEET 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...
  • Page 56 Electrical Requirements Figure 61. Typical dual fan VFD wiring schematic - outdoor air handler only TRANE UNLESS OTHERWISE SPECIFIED ALL 196006960001 SHEET 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...
  • Page 57 Electrical Requirements Figure 62. Typical starter wiring schematic for indoor air handler only TRANE UNLESS OTHERWISE SPECIFIED ALL 196001380001 SHEET DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF TRANE HIGH VOLTAGE FINISH...
  • Page 58 Electrical Requirements Figure 63. Typical starter wiring schematic for outdoor air handler only TRANE UNLESS OTHERWISE SPECIFIED ALL 196006930001 SHEET DIMENSIONS ARE IN INCHES. TOLERANCE: THIS DRAWING IS PROPRIETARY AND SHALL NOT BE COPIED OR ITS CONTENTS DISCLOSED TO OUTSIDE PARTIES WITHOUT THE WRITTEN CONSENT OF TRANE HIGH VOLTAGE FINISH...

  • Page 59: Start-Up

    Start-Up Pre-Startup Checklist • Check piping and valves for leaks. Open or close the valves to check for proper operation. Drain lines should be open. Once the air handler has been assembled and installed, attention must be directed to individual components for •...

  • Page 60: Unit Operation

    Start-Up Motor-Related Checks WARNING • Locate installation manual from the motor Live Electrical Components! manufacturer for the specific motor installed. This can be found by contacting the motor manufacturer’s Failure to follow all electrical safety precautions when representative. The motor manufacturer’s exposed to live electrical components could result in recommendations take precedence for all matters death or serious injury.
  • Page 61 Start-Up Table 14. Trane TR150 switching frequency WARNING Hazardous Voltage w/Capacitors! Horsepower Voltage Max KHz Trane Setting 0.5 - 15 200/230 Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. 20-60 200/230 Disconnect all electric power, including remote 0.5 - 30 disconnects and discharge all motor start/run capacitors before servicing.
  • Page 62 Start-Up Tension the Fan Belt Figure 65. Belt tensioner Notice Belt Over-Tension! Over-tensioning the belt could result in equipment Force scale damage as it reduces fan and motor bearing life, Small O-ring accelerates belt wear, and can cause shaft failure. Notice Belt Under-Tension! Under tensioning the belt could result in belt failure.
  • Page 63 Start-Up Table 16. Typical sheave diameter and deflection force Belt Deflection Force (lbs) Super gripbelts and Gripnotch belts and Smallest sheave unnotched gripbands notched gripbands Cross diameter range Speed (rpm) section (in.) range Used belt New belt Used belt New belt 1,000–2,500 3.0–3.6 2,501–4,000...

  • Page 64: External Insulating Requirements

    Start-Up Align Fan and Motor Sheaves Figure 67. Proper drive alignment Align the fan and motor sheaves using a straightedge. The Center line straightedge must be long enough to span the distance Lines must must coincide be parallel between the outside edges of the sheaves. When the sheaves are aligned, the straightedge will touch both sheaves at points A through D (see Figure...

  • Page 65: Routine Maintenance

    Routine Maintenance WARNING WARNING Hazardous Service Procedures! Rotating Components! Failure to follow all of the recommended safety Failure to secure rotor or disconnect power before warnings provided, could result in death or serious servicing could result in rotating components cutting injury.

  • Page 66: Air Filters

    Routine Maintenance Air Filters Steam and Water Coils WARNING WARNING Hazardous Voltage! Rotating Components! Failure to disconnect power before servicing could Failure to secure rotor or disconnect power before result in death or serious injury. Disconnect all electric servicing could result in rotating components cutting power, including remote disconnects before servicing.
  • Page 67 Routine Maintenance 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 5. Mix a high-quality coil cleaning detergent with water according to the manufacturer’s instructions. For MI fan vertical unit, access via the coil door, see Figure Note: If the detergent is strongly alkaline after mixing (PH...
  • Page 68 Routine Maintenance Refrigerant Coils – Keep the nozzle at least 6 inches from the coil. – Do not exceed 600 psi. 6. Spray the leaving air side of the coil first, then the WARNING entering air side. Hazardous Pressures! 7. Thoroughly rinse both sides of the coil and the drain Failure to follow these safety precautions could result in pan with cool, clean water.

  • Page 69: Drain Pans

    Routine Maintenance Moisture Purge Cycle 1. Disconnect all electrical power to the unit. 2. Wearing the appropriate personal protective By it’s very nature, any HVAC unit with a cooling coil serves equipment, remove any standing water. as a dehumidifier, reducing the surrounding air’s ability to hold water vapor as its temperature falls.
  • Page 70 Routine Maintenance downstream coil. The reset button is located on the low Figure 73. Resetting low limit switch for vertical limit switch box. The unit configuration will determine the motorized impeller fans method used. • Horizontal units equipped with a housed fan, low limit switch can be accessed through the fan access door (see Figure...
  • Page 71 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 14-30, see Figure Figure 75.

  • Page 72: Fans

    Routine Maintenance Fans Figure 76. Bearing set screw alignment WARNING Rotating Components! Failure to secure rotor or disconnect power before servicing could result in rotating components cutting and slashing technician which could result in death or serious injury. The following procedure involves working with rotating components.

  • Page 73: Outside Air Intake Hoods

    Routine Maintenance Fan Bearing Lubrication Fan Motor Inspection Inspect fan motors periodically for excessive vibration or NOTICE temperature. Operating conditions will vary the frequency of inspection and lubrication. Motor lubrication Bearing Failure! instructions are on the motor tag or nameplate. If for some reason these instructions are not available, contact the Mixing grease within the bearing could result in premature bearing failure.

  • Page 74: Troubleshooting

    Troubleshooting This section is intended to be used as a diagnostic aid only. For detailed repair procedures, contact your local Trane service representative. WARNING Hazardous Service Procedures! Failure to follow all of the recommended safety warnings provided could result in death or serious injury. The maintenance and troubleshooting procedures recommended in this manual could result in exposure to electrical, mechanical or other potential safety hazards.
  • Page 75 Troubleshooting Table 22. Air handler troubleshooting recommendations (continued) Symptom Probable Cause Recommended Action Loosen bearing set screws and realign (see “Align Fan and Motor Poor alignment Sheaves,” p. Bearing noise Failed bearing Replace bearing. Inadequate lubrication Replace bearing. Incorrect airflow Check fan operating condition.
  • Page 76 Trane - by Trane Technologies (NYSE: TT), a global climate innovator - creates comfortable, energy efficient indoor environments for commercial and residential applications. For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

Table of Contents

Save PDF