Installation,Operation, and Maintenance

1 Installation, Operation, and Maintenance Packaged Rooftop Air Conditioners Precedent Cooling and Gas/Electric 3 to 10 Tons 60 Hz Model Numbers YSC033G - YSC063G YHC037E - YHC067E. YSC036 - YSC060G YHC036E - YHC072E. YSC072F - YSC120F YHC120F. YHC048F - YHC060F YHC072F - YHC102F. 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. 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.

2 May 2016 RT-SVX21U-EN. Introduction Read this manual thoroughly before operating or servicing this unit. WARNING. Warnings, Cautions, and Notices Proper Field Wiring and Grounding Required! Safety advisories appear throughout this manual as personal safety and the proper operation of Failure to follow code could result in death or serious injury. All field wiring MUST be performed by qualified this machine depend upon the strict observance of these personnel. Improperly installed and grounded field precautions. wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in The three types of advisories are defined as follows: NEC and your local/state electrical codes.

3 Indicates a potentially hazardous WARNING situation which, if not avoided, could result in death or serious injury. WARNING. Indicates a potentially hazardous Personal Protective Equipment (PPE). CAUTIONs situation which, if not avoided, could result in minor or moderate injury. It Required! could also be used to alert against Failure to wear proper PPE for the job being undertaken unsafe practices. could result in death or serious injury. Technicians, in order to protect themselves from potential electrical, NOTICE Indicates a situation that could result in mechanical, and chemical hazards, MUST follow equipment or property-damage only precautions in this manual and on the tags, stickers, accidents. and labels, as well as the instructions below: Important Environmental Concerns Before installing/servicing this unit, technicians MUST put on all PPE required for the work being Scientific research has shown that certain man-made undertaken (Examples; cut resistant gloves/sleeves, chemicals can affect the earth's naturally occurring butyl gloves, safety glasses, hard hat/bump cap, fall stratospheric ozone layer when released to the protection, electrical PPE and arc flash clothing).

4 Atmosphere. In particular, several of the identified ALWAYS refer to appropriate Material Safety Data chemicals that may affect the ozone layer are refrigerants Sheets (MSDS)/Safety Data Sheets (SDS) and OSHA. that contain Chlorine, Fluorine and Carbon (CFCs) and guidelines for proper PPE. those containing Hydrogen, Chlorine, Fluorine and When working with or around hazardous chemicals, Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the ALWAYS refer to the appropriate MSDS/SDS and OSHA/GHS (Global Harmonized System of advocates the responsible handling of Classification and Labelling of Chemicals) guidelines all refrigerants-including industry replacements for CFCs such as HCFCs and HFCs. for information on allowable personal exposure levels, proper respiratory protection and handling Important Responsible Refrigerant instructions.

5 Practices If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE in accordance Trane believes that responsible refrigerant practices are with OSHA, NFPA 70E, or other country-specific important to the environment, our customers, and the air requirements for arc flash protection, PRIOR to conditioning industry. All technicians who handle servicing the unit. NEVER PERFORM ANY. refrigerants must be Federal Clean Air Act SWITCHING, DISCONNECTING, OR VOLTAGE. (Section 608) sets forth the requirements for handling, TESTING WITHOUT PROPER ELECTRICAL PPE AND. reclaiming, recovering and recycling of certain ARC FLASH CLOTHING. ENSURE ELECTRICAL. refrigerants and the equipment that is used in these METERS AND EQUIPMENT ARE PROPERLY RATED.

6 Service procedures. In addition, some states or FOR INTENDED VOLTAGE. municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them. Copyright This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in part without written reserves the right to revise this publication at any time, and to make changes 2016 Ingersoll Rand All rights reserved RT-SVX21U-EN. Introduction to its content without obligation to notify any person of such revision or change. Trademarks All trademarks referenced in this document are the trademarks of their respective owners. Revision History Added Air-Fi Wireless Communication Interface Unit start-up, removal of MMC.

7 Limited warranty updates RT-SVX21U-EN 3. Table of Contents Model Number Descriptions - 3 to 10 Tons (T/Y) Factory Installed Economizer ..30. 6 Temperature Limit Switch Usage for Gas Model Number Notes .. 7 Heat Units ..30. Model Number Descriptions - 3 to 5 Tons (T/Y - Horizontal Discharge Conversion (3 to 5 Ton 17 Plus) .. 9 Units) ..31. Model Number Notes .. 10 TCO1 Instructions ..31. General Information .. 11 Horizontal Discharge Conversion (6 to 10 Ton Units) ..32. Unit Inspection .. 11. TCO1 Instructions ..33. Storage .. 11. Return Air Smoke Detector ..33. Unit Nameplate .. 11. Air-Fi Wireless Communication Interface 34. Compressor Nameplate .. 11. Main Electrical Power Requirements ..34. Microchannel Coil Barcode ID .. 11. Through-the-Base Gas Installation.

8 35. Unit Description .. 11. Requirements for Gas Heat ..35. Economizer Control Actuator (Optional) 11. Condensate Drain Configuration ..36. System Input Devices & Functions .. 12. Filter Installation ..36. Low Pressure Control .. 13. Field Installed Power Wiring ..37. High Pressure Control .. 13. Main Unit Power ..37. Power Exhaust Control (Optional) .. 13. Standard Wiring ..37. Lead/Lag Control (Dual Circuit Only) .. 13. Optional TBUE Wiring (Through-the-Base Evaporator Frost Control .. 14 Electrical Option) ..37. Discharge Line Temp Switch (DLTS) .. 15 Field-Installed Control Wiring ..38. Smoke Detector Sensor (Optional) .. 15 Control Power Transformer ..38. Phase Monitor .. 15 Controls Using 24 VAC ..38. Single Zone Variable Air Volume / Displace- Controls using DC Analog Input/Outputs ment Ventilation (Optional).

9 15 (Standard Low Voltage Multi Human Interface - 5 Inch Color Touchscreen conductor Wire) ..39. (Optional) .. 15 DC Conductors ..39. Unit Dimensions .. 16 Space Temperature Averaging (ReliaTel On- Installation .. 24 ly) ..44. Pre-Installation .. 24 Pre-Start ..47. Procedure .. 24 Voltage Imbalance ..47. Foundation .. 26 Electrical Phasing (Three Phase Motors) ..47. Horizontal Units .. 26 Compressor Crankcase Heaters (Optional) 48. Ductwork .. 27 ReliaTel Controls ..48. Roof Curb .. 28 Test Modes ..49. Downflow .. 28 ReliaTel Controls ..49. Rigging .. 29 Electromechanical Controls Test Procedure ..50. General Unit Requirements .. 29. 4 RT-SVX21U-EN. Table of Contents Unit Start-Up .. 51 Clogged Filter Switch ..65. Verifying Proper Air Flow .. 51 Fan Failure Switch.

10 65. Units with 5-Tap Direct Drive Indoor Fan 51 Condensate Overflow Switch ..65. Units with Belt Drive Indoor Fan .. 51 Zone Temperature Sensor (ZTS) Tests ..65. Units with Direct Drive Indoor Fan - Electro- Test 1 - Zone Temperature Thermistor mechanical Control .. 52 (ZTEMP) ..65. ReliaTel Units with Direct Drive Indoor Fan Test 2 - Cooling Set Point (CSP) and Heating (10 Tons Standard Efficiency, 6(074) to 10 Set Point (HSP) ..65. Tons High Efficiency) .. 52 Test 3 - System Mode and Fan Selection .65. Units with Constant CFM Direct Drive Indoor Test 4 - LED Indicator Test, (SYS ON, HEAT, Fan .. 53 COOL & SERVICE) ..66. 17 Plus units with the constant CFM direct Relative Humidity Sensor Test ..66. drive indoor fan .. 53. Programmable & Digital Zone Sensor Variable Air Volume Applications (Traditional Test.)