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Trane Horizon OADG Series Installation, Operation And Maintenance Manual

Outdoor air unit
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Installation, Operation,
and Maintenance
Horizon™ Outdoor Air Unit
Indirect Fired Gas/Electric Heat/Air Source Heat Pump
Model: OADG and OANG
Important:
Proper execution of the tasks outlined in this Installation, Operation, and Maintenance manual
require and assume the technician has been certified as a start up technician for the Horizon Outdoor
Air unit. This includes working knowledge of the Tracer TU program.
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.
L'installation et l'entretien de cet équipement doivent être assurés exclusivement par du personnel qualifié.
L'installation, la mise en service et l'entretien d'équipements de chauffage, de ventilation et de climatisation
(CVC) présentent un danger et requièrent des connaissances et une formation spécifiques. Une installation,
un réglage ou une modification inappropriés d'un équipement par une personne non qualifiée peut provoquer
des blessures graves, voire la mort. Lors de toute intervention sur l'équipement, respectez les consignes de
sécurité figurant dans la documentation, ainsi que sur les pictogrammes, autocollants et étiquettes apposés
sur l'équipement..
November 2019
SAFETY WARNING
AVERTISSEMENT DE SÉCURITÉ
OAU-SVX006C-EN
OAU-SVX006C-EN

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  • Page 1 Installation, Operation, and Maintenance Horizon™ Outdoor Air Unit Indirect Fired Gas/Electric Heat/Air Source Heat Pump Model: OADG and OANG Important: Proper execution of the tasks outlined in this Installation, Operation, and Maintenance manual require and assume the technician has been certified as a start up technician for the Horizon Outdoor Air unit.
  • Page 2 Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment. Trane advocates the responsible handling of all refrigerants-including industry replacements for CFCs such as HCFCs and HFCs. Important Responsible Refrigerant...
  • Page 3 Introduction WARNING AVERTISSEMENT Personal Protective Equipment (PPE) Équipements de protection individuelle Required! (EPI) obligatoires! Failure to wear proper PPE for the job being undertaken En cas d’équipement de protection individuelle could result in death or serious injury. Technicians, in inadapté au travail entrepris, les techniciens s’exposent order to protect themselves from potential electrical, à...
  • Page 4 Introduction WARNING AVERTISSEMENT Follow EHS Policies! Fluide frigorigène sous haute pression! Failure to follow instructions below could result in Tout manquement aux instructions indiquées ci- death or serious injury. dessous peut provoquer une explosion pouvant causer des blessures graves voire mortelles ou des dommages •...
  • Page 5 3. Extinguish any open flame. 4. Immediately call your gas supplier. 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 permission. Trane reserves the right AVERTISSEMENT...

  • Page 6: Table Of Contents

    Table of Contents Model Number Descriptions Unit Weight and Rigging ....8 ....23 Horizon Outdoor Air Unit Unit Weight .
  • Page 7 Table of Contents General Data ......50 Alarms and Troubleshooting ... . 57 Microprocessor Control .

  • Page 8: Model Number Descriptions

    Model Number Descriptions Horizon Outdoor Air Digit 11 — Indoor Coil Type Digit 17 — Heat Capacity— Primary No Indoor Coil Unit DX 4-Row DX 6-Row ELEC HOT WATER Glycol/Chilled Water Coil—4- Model: OADG and OANG No Heat 50 MBh 5 kW 1 Row/10 FPI Glycol/Chilled Water Coil—6-...
  • Page 9 Model Number Descriptions Digit 20 — Not Used 20 hp—3600 rpm Digit 34 — Energy Recovery No Energy Recovery Digit 26 — Exhaust Fan Motor Digit 21 — Supply Fan Motor ERV—Composite Construction Type 1 hp—1800 rpm with Bypass for Frost Protection 1 hp—3600 rpm No Powered Exhaust ERV—Composite Construction...
  • Page 10 Model Number Descriptions Digit 42 — Corrosive Digit 54 — Cooling Controls Environment Package No ReliaTel™ ReliaTel™ No Corrosive Package ReliaTel™ with BCIR Card Eco Coated Coils S/S Interior Digit 55 — Face and Bypass on S/S Coil Casing Indoor Coil S/S Coil Casing with Eco Coated No Face and Bypass Coils...

  • Page 11: General Information

    General Information Overview of Manual receive information from sensors and customer binary contacts to satisfy the applicable request for ventilation, Note: One copy of this document ships inside the control cooling, dehumidification and heating. panel of each unit and is customer property. It must Indoor Fan Failure Input be retained by the unit’s maintenance personnel.

  • Page 12: Space Temperature / Rh Sensor (Optional)

    General Information On dual circuit units, if the high pressure control opens, Units will be suitable for use with natural gas or Liquid the compressor on the affected circuit is locked out. A Propane (LP) gas. manual reset for the affected circuit is required. Through the Base Electrical with Space Temperature / RH Sensor (Optional) Disconnect Switch...

  • Page 13: First Aid Measures

    General Information Unit Inspection • Wash clothes separately from other clothing: rinse washer thoroughly. • Operations such as sawing, blowing, tear-out, and WARNING spraying may generate fiber concentrations requiring additional respiratory protection. Use the appropriate Fiberglass Wool! NIOSH approved respiration in these situations. Product may contain fiberglass wool.

  • Page 14: Unit Clearances, Curb Dimensions, And Dimensional Data

    Unit Clearances, Curb Dimensions, and Dimensional Data Figure 2. Installation clearances for unit with powered WARNING exhaust but no ERV, in. (cm) Combustible Materials! Failure to maintain proper clearance between the unit heat exchanger, vent surfaces and combustible materials could cause a fire which could result in death or serious injury or property damage.

  • Page 15: Curb Dimensions

    Unit Clearances, Curb Dimensions, and Dimensional Data Curb Dimensions Figure 5. Unit curb data for OAD cabinet with no powered exhaust or ERV, in. (cm) (14.0) (12.7) (33.0) 33.5 (142.2) (261.6) (85.1) (116.8) 26.5 (67.3) 24.5 (12.7) (62.2) 1.75 (4.4) TOP FLANGE Figure 6.

  • Page 16: Dimensional Data

    Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 8. Unit dimensional data for OAD unit with no powered exhaust or ERV, in. (cm) 146.888 (373.1) 95.281 (242) 110.437 36.451 31.994 (280.5) (92.6) (81.3) 2.689 (6.8) 27.060 (68.7) HEAT ONLY 68.594 (174.2)
  • Page 17 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 9. Unit dimensional data for OAD cabinet with powered exhaust but no ERV, in. (cm) 146.888 (373.1) 63.437 (161.1) 2.689 36.451 110.437 31.994 (6.8) (92.6) (280.5) (81.3) HEAT ONLY 27.060 (68.7) 68.594 (174.2) 19.500 P.E.
  • Page 18 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 10. Unit dimensional data for OAD cabinet with ERV, in. (cm) 213.046 95.281 (541.1) (242.0) 31.994 176.500 36.546 2.689 (81.3) (448.3) (92.8) (6.8) 87.925 HEAT 27.060 (223.3) (68.7) ONLY 68.594 (174.2) 31.500 23.500 (80.0) 38.845...

  • Page 19: Oan Units

    Unit Clearances, Curb Dimensions, and Dimensional Data OAN Units Figure 14. Unit to unit clearance, in. (cm) Unit Clearances Figure 11. Installation clearances for units with no powered exhaust or ERV, in. (cm) 84.000 96.000 [213.36] [243.84] 36.0 [91.4] 54.0 Curb Dimensions [137.2] 96.0...
  • Page 20 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 17. Unit curb data for OAN cabinet with ERV, in. (cm) 7.25 76.50 SUPPLY 1.75 73.50 1.00 7.25 20.00 1X4 WOOD 98.50 76.15 43.00 33.85 NAILER 11.00 10.50 2.00 293.00 91.00 14.00 14.00 14.00 91.50...
  • Page 21 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 19. Unit dimensional data for OAN cabinet with powered exhaust but no ERV, in. (cm) 278.332 (707) 33.959 244.374 109.194 7.013 (86.3) (620.7) (277.4) (17.8) 36.110 (91.7) 107.518 (273.1) 63.597 40.000 10.514 32.217 (161.5) (101.6)
  • Page 22 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 20. Unit dimensional data for OAN cabinet with ERV, in. (cm) 334.332 (849.2) 109.194 (277.4) 33.959 300.372 7.013 (86.3) (762.9) (17.8) 36.110 (91.7) 107.518 (273.1) 63.597 40.000 10.514 (161.5) (101.6) 32.217 (26.7) (81.8) 2.000 (5.1)

  • Page 23: Unit Weight And Rigging

    Unit Weight and Rigging WARNING WARNING Heavy Objects! Improper Unit Lift! Failure to follow instructions below or properly lift unit Failure to properly lift unit could result in unit dropping could result in unit dropping and possibly crushing and possibly crushing operator/technician which could operator/technician which could result in death or result in death or serious injury, and equipment or serious injury, and equipment or property-only damage.
  • Page 24 Unit Weight and Rigging Table 2. Typical unit weight, center of gravity, and corner weights (percentage of total weight) - air cooled units with powered exhaust but without ERV Weight (lbs) Center of Gravity (in.) Corner weight (% of total weight) Model Number Length Width...
  • Page 25 Unit Weight and Rigging Rigging Figure 26. Six-point lift (OAD cabinet with ERV section) Figure 24. Four-point lift (OAD cabinet with no exhaust fan or ERV) SPREADER BARS SPREADER BARS DETAIL A SCALE 1 : 16 DETAIL A SCALE 1 : 12 SCREW PIN SHACKLE 6 LOCATIONS SCREW PIN SHACKLE...
  • Page 26 Unit Weight and Rigging Before proceeding, refer to Table 1, p. Table 2, p. 24 Figure 28. Ten-point lift (OAN cabinet with exhaust fan Table 3, p. 24 for typical unit operating weights and and no ERV) Figure 23, p. 25 for rigging drawing.

  • Page 27: Installation

    Installation duct work must be installed and connected to top of roof curb before the unit is set on curb. WARNING If a Curb Accessory Kit is not used: Hazardous Service Procedures! 1. Be sure to use flexible duct connections at the unit. Failure to follow all precautions in this manual and on the tags, stickers, and labels could result in death or 2.

  • Page 28: Main Electrical Power Requirements

    Installation  Assemble and install the roof curb (if applicable). Figure 31. Condensate trap installation Refer to the latest edition of the curb installers guide that ships with each curb kit. Check curb for level installation; if not level, shim as required. ...

  • Page 29: Chilled Water Connection Size And Location

    Installation Figure 33. OAN water inlet and outlet, in. (cm) Table 4. Chilled water pipe chase location, in. (cm) Unit 64.25 (163.2) 30.00 (76.2) 18.00 (45.7) 3.50 (8.9) 92.64 (235.3) 30.00 (76.2) 18.00 (45.7) 2.81 (7.1) Table 5. Chilled water connection size (MPT-in.) Unit Size MPT-in.
  • Page 30 Installation Figure 37, p. 30. To ensure that the unit’s supply power Figure 37. OAD utility connections, in. (cm) wiring is properly sized and installed, refer to the following guidelines. Figure 35. OAD power entrance Electric 27.000 Disconnect (68.6) 49.446 (125.6) 22.446 (57.0)

  • Page 31: Main Unit Power

    Installation Main Unit Power Figure 38. OAN utility connections, in. (cm) WARNING Hazardous Voltage! Failure to disconnect power before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.
  • Page 32 Installation Voltage Imbalance The electrical service must be protected from over current and short circuit conditions in accordance with NEC requirements. Protection devices must be sized according WARNING to the electrical data on the nameplate. 1. Location of the applicable electrical service entrance is Live Electrical Components! illustrated in Figure 37, p.

  • Page 33: Electrical Phasing (Three-Phase Motors)

    Installation The percentage of Imbalance equals:  Observe the ABC and CBA phase indicator lights on the face of the sequencer. The ABC indicator light will 226 - 221 glow if the phase is ABC. If the CBA indicator light 100 X = 2.2% glows, turn main source power off and then open the...

  • Page 34: Main Unit Display And Reliatel Controls

    Installation Control Power Transformer Before initial start up, or if main power has been off for an extended period of time, compressor crankcase heater(s) should be operated for a minimum of 8 hours prior to WARNING compressor operation. With main power OFF, remove jumper between OAUTS terminals 9 and 10 (E-Stop).

  • Page 35: Controls Using Dc Analog Input/Output (Standard Low Voltage Multiconductor Wire)

    Installation refer to Figure 37, p. 30 for the electrical access locations NOTICE provided on the unit. Table 7 lists the conductor sizing guidelines that must Use Copper Conductors Only! be followed when interconnecting the DC binary Failure to use copper conductors could result in output devices and the system components utilizing a equipment damage as unit terminals are not designed DC analog input\output signal to the unit.

  • Page 36: Factory-Provided Sensors

    Installation Figure 39. OAUTS Connection B Factory-Provided Sensors A discharge temperature sensor (VELSEN-0021) will be factory-provided for field installation in the supply duct. Refer to Figure 46, p. 61 for installation instructions. If space control is selected, a combination space temperature/humidity sensor (BAYSENS036A) will be factory-provided for field installation in the space.

  • Page 37: Pre-Start Check List

    8. Startup appointment with Horizon certified Trane service technician set and confirmed. Notes: • Check list must be completed and returned to Trane before startup is scheduled. • Startup must be performed by a Horizon-certified Trane technician with Tracer™ TU program. •...

  • Page 38: System Configuration And Pre-Start

    System Configuration and Pre-Start The following procedure must be completed prior to additional control system information, refer performing the startup procedure in “Startup,” p. 41. This to Integration Guide: Tracer™ UC600 section describes procedures to navigate the various Programmable Controller for Packaged displays on the Unit Display and configure the Outdoor Air Outdoor Air Unit (BAS-SVP18*-EN).
  • Page 39 System Configuration and Pre-Start Table 8. Menu descriptions Screen Menu Point List Min/Inactive Default Max/Active Point? Active Alarms List of all active alarms Alarms All Alarms List of all previous alarms Custom Graphics *NOT USED* Program Control Discharge Air Control Space Control Space Control Heat Cool Mode Active Heat...
  • Page 40 System Configuration and Pre-Start Table 8. Menu descriptions (continued) Screen Menu Point List Min/Inactive Default Max/Active Point? DAT High Temp Cutout 100°F 125°F 150°F DAT Low Temp Cutout 35°F 35°F 50°F DAT Temp Cutout Time 10 min. 10 min. 25 min. Discharge Air Cooling Setpoint 55°F 55°F...

  • Page 41: Startup

    Startup Note: Refer to “Horizon™ Dedicated Outdoor Air Unit Startup Form,” p. 65 for a copy of the startup form. AVERTISSEMENT Procédures d’entretien dangereuses! Indirect Fired Gas Heating Startup Le non-respect de toutes les précautions contenues dans ce manuel ainsi que sur les étiquettes et les autocollants peut entraîner des blessures graves voire WARNING mortelles.

  • Page 42: Startup Procedure

    Open all manual gas valves. Turn power on at unit’s to IFFS are tight and secure. main disconnect switch. Open gas supply manual shut- off valve. Using unit display (or computer with Trane Tracer TU), proceed to System Status Display and Override all Compressor stages OFF, Disable...
  • Page 43 Startup ERV. If two heaters are installed, test heating with split High Fire and Low Fire Adjustment manifold first by overriding burner 2 OFF. Override To adjust high fire or low fire setting, please refer to heating Output Command to 100.0 percent if one EXA STAR Modulating Valve document.
  • Page 44 Startup recirculation, a flue extension may be required to Figure 40. Flame characteristics of properly-adjusted prevent recirculation. Contact manufacturer prior natural gas systems to making any flue adjustments. • Reduced air delivery can also be the result of inducer fan blade slippage, dirt accumulation in the fan blade or low voltage to draft inducer motor.

  • Page 45: Safety Controls

    Startup Figure 41. Indirect fired gas furnace components IGNITION AIR-PROVING INDUCER BLOWER SWITCH CONTROLLERS INDUCER MOTOR MODULATING GAS VALVE CONDENSATE DRAIN ROLLOUT (TYP. 2) SWITCH ROLLOUT SWITCH HIGH LIMIT SWITCH MINIMUM/MAXIMUM INLET PRESSURE = 7 IN. WC/14 IN. WC (1.7 KPA/3.5 KPA) FLAME MANIFOLD GAS ON/OFF GAS VALVE...

  • Page 46: Maintenance

    Maintenance Make sure all personnel are standing clear of the unit • Inspect the evaporator and condenser coils for dirt, before proceeding. The system components will start bent fins, etc. If the coils appear dirty, clean them when the power is applied. according to the instructions described in “Condenser Coil Cleaning,”...
  • Page 47 Maintenance At least once each year, or more often if the unit is located in a “dirty” environment, clean the condenser coils using WARNING the instructions outlined below. Be sure to follow these Hazardous Chemicals! instructions as closely as possible to avoid damaging the coils.
  • Page 48 Maintenance AVERTISSEMENT Pressions dangereuses! Tout manquement aux consignes de sécurité préconisées ci-dessous risquerait d’entraîner un éclatement du serpentin susceptible de provoquer des blessures graves voire mortelles. Les serpentins contiennent du fluide frigorigène sous pression. Lors du nettoyage des serpentins, maintenez la température de l’agent de nettoyage pour serpentin à...
  • Page 49 Maintenance Final Process (3) Wiring Diagram Numbers (from unit control panel) — schematic(s) For future reference, you may find it helpful to record the _____________________________________________________ unit data requested below in the blanks provided. _____________________________________________________ (1) Complete Unit Model Number: _____________________________________________________ _____________________________________________________ _____________________________________________________ _____________________________________________________...

  • Page 50: General Data

    General Data Table 10. General data—Cooling 10–20 tons high efficiency 10 Tons Downflow 12 Tons Downflow 15 Tons Downflow 17 Tons Downflow 20 Tons Downflow OADG010 OADG012 OADG015 OADG017 OADG020 Cooling Performance (6-row) Gross Cooling Capacity, Btu (kW) 134,530 (39.43) 153,380 (44.95) 192,718 (56.48) 215,551 (63.17)
  • Page 51 General Data Table 11. General data—ASHP 10–20 tons high efficiency 10 Tons Downflow 12 Tons Downflow 15 Tons Downflow 17 Tons Downflow 20 Tons Downflow OADG010 OADG012 OADG015 OADG017 OADG020 Performance Gross Cooling Capacity, Btu (kW) 131,284 (38.48) 149,705 (43.87) 187,181 (54.86) 217,530 (63.75) 250,834 (73.51)
  • Page 52 General Data Table 12. General data—Cooling 40–80 tons high efficiency 40 Tons 45 Tons 50 Tons 55 Tons 60 Tons 70 Tons 80 Tons Downflow Downflow Downflow Downflow Downflow Downflow Downflow OANG040 OANG045 OANG050 OANG055 OANG060 OANG070 OANG080 Cooling Performance (6-row) Gross Cooling Capacity, Btu 511,968...
  • Page 53 General Data Table 12. General data—Cooling 40–80 tons high efficiency (continued) 40 Tons 45 Tons 50 Tons 55 Tons 60 Tons 70 Tons 80 Tons Downflow Downflow Downflow Downflow Downflow Downflow Downflow OANG040 OANG045 OANG050 OANG055 OANG060 OANG070 OANG080 Motor RPM (Standard/ 1750–3500 1750–3500 1750–3500...
  • Page 54 General Data Table 13. General data—ASHP 40–80 tons high efficiency 40 Tons 45 Tons 50 Tons 55 Tons 60 Tons 70 Tons 80 Tons Downflow Downflow Downflow Downflow Downflow Downflow Downflow OANG040 OANG045 OANG050 OANG055 OANG060 OANG070 OANG080 Diameter, in. (mm) Varies Varies Varies...
  • Page 55 General Data Superheat and Refrigeration Figure 43. Refrigeration diagram: Tandem compressor Circuit Data with reheat Figure 42. Refrigeration diagram: Tandem compressor without reheat OAU-SVX006C-EN...
  • Page 56 General Data Figure 44. Refrigeration diagram: ASHP Tandem Figure 45. Refrigeration diagram: ASHP Tandem compressor without reheat compressor with reheat OAU-SVX006C-EN...

  • Page 57: Alarms And Troubleshooting

    Alarms and Troubleshooting Microprocessor Control 3. Utilizing “Method 1” in the RTRM “System Status Checkout Procedure”, check the following: The Main Unit Display and RTRM have the ability to • System status provide the service personnel with some unit diagnostics and system status information.
  • Page 58 Alarms and Troubleshooting Table 14. TOAU UC600 alarms (continued) Table 14. TOAU UC600 alarms Point Diagnostic Possible Cause Point Diagnostic Possible Cause Applies to 5:1 and 10:1 Gas Heaters Only VFD not operating Trips after heat command “ON” and no GV Outdoor and/or Return Air Dampers not status offer 1 minute Operating Properly...

  • Page 59: Rtrm Failure Modes

    Alarms and Troubleshooting Table 15. TOAU UC600 troubleshooting (continued) System Failure = less than 1 Vdc, approximately 0.75 Vdc Trouble Possible Cause Cool Failure High fire gas manifold pressure too high Measure the voltage between terminals J6-8 and J6-6. Supply fan speed too low Cool Operating = approximately 32 Vdc Dirty or clogged filters Unit Trips Heater...

  • Page 60: Appendix

    Appendix OAU Filter Guide Table 17. OAD units Evaporator Thickness, in. (cm) MERV Height, in. (cm) Width, in. (cm) 2 (5.1) 8, 13 24 (63.5) 18 (45.7) 4 (10.2) 24 (63.5) 18 (45.7) ERV Module Return Air Thickness, in. (cm) MERV Height, in.
  • Page 61 Appendix Field Installation of Factory- Provided Sensors Figure 46. VELSEN-0021 installation instructions OAU-SVX006C-EN...
  • Page 62 Appendix Figure 47. BAYSENS036A installation instructions OAU-SVX006C-EN...
  • Page 63 Appendix Figure 48. MZVAV DSPS document OAU-SVX006C-EN...
  • Page 64 Appendix Figure 49. VELCON-0350 installation instructions for modulating OA/RA dampers w/economizer and an exhaust fan OAU-SVX006C-EN...
  • Page 65 Appendix Horizon™ Dedicated Outdoor Air Unit Startup Form : __________________ Date Job Name :_____________________________________________________________________ Address :_____________________________________________________________________ _____________________________________________________________________ Serial Number: ________________________________ Tag : __________________________ Start up contractor : _____________________________________________________________ Address :_____________________________________________________________________ _____________________________________________________________________ Pre Startup Checklist Installing contractor should verify the following items. 1 .
  • Page 66 Appendix Horizon™ Dedicated Outdoor Air Unit Startup Form Supply Fan Assembly Fan 2 - Alignment Name plate amps: Actual Amps: Rotation Hrtz: Fan 2 - Alignment Name plate amps: Actual Amps: Rotation Hrtz: Energy Recover Wheel Wheel Spins freely Check Rotation FLA: Voltage Amps:...
  • Page 67 Appendix Horizon™ Dedicated Outdoor Air Unit Startup Form Water / Glycol System 1. Has the entire system been flushed and pressure checked? _____YES NO_____ 2. Has the entire system been filled with fluid? _____YES NO_____ 3. Has air been bled from the heat exchangers and piping? _____YES NO_____ 4.
  • Page 68 Our people and our family of brands—including Club Car®, Ingersoll Rand®, Thermo King® and Trane®—work together to enhance the quality and comfort of air in homes and buildings; transport and protect food and perishables; and increase industrial productivity and efficiency. We are a global business committed to a world of sustainable progress and enduring results.

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