Trane Horizon OABE Installation, Operation And Maintenance Manual
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Trane Horizon OABE Installation, Operation And Maintenance Manual

Trane Horizon OABE Installation, Operation And Maintenance Manual

Indirect gas-fired/electric heat and air source heat pump
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Installation, Operation,
and Maintenance
Horizon™ Outdoor Air Unit
Indirect Gas-Fired/Electric Heat and Air Source Heat Pump
Models: OABD, OABE, OAGD, OAGE
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-SVX02F-EN

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Summary of Contents for Trane Horizon OABE

  • Page 1 Installation, Operation, and Maintenance Horizon™ Outdoor Air Unit Indirect Gas-Fired/Electric Heat and Air Source Heat Pump Models: OABD, OABE, OAGD, OAGE 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 and HCFCs such as saturated or unsaturated HFCs and HCFCs.
  • 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...
  • Page 4 Introduction WARNING AVERTISSEMENT Refrigerant under High Pressure! Risque d’explosion et gaz mortels ! Failure to follow instructions below could result in an Le non-respect de toutes les consignes de manipulation explosion which could result in death or serious injury des fluides frigorigènes peut entraîner la mort ou des or equipment damage.
  • Page 5 3. Extinguish any open flame. This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in 4. Immediately call your gas supplier. part without written permission. Trane reserves the right...

  • Page 6: Table Of Contents

    Table of Contents Model Number Descriptions Flue Assembly Instructions ... .23 ....8 Main Electrical Power Requirements ..25 General Information .
  • Page 7 Table of Contents Performance Data ..... . 47 Superheat and Refrigeration Circuit Data Alarms and Troubleshooting ... . 53 Microprocessor Control .

  • Page 8: Model Number Descriptions

    Model Number Descriptions Digit 1, 2 — Unit Type Digit 13 — Compressor Digit 18 — Indoor Fan Motor (hp) OA = Outdoor Air No Compressors Scroll Compressors Digit 3 — Cabinet Size Digital Scroll (1 Circuit Only) Belt Drive 500 cfm–3000 cfm Digital Scroll (1 and 2...
  • Page 9 Digit 25, 26 — Unit Controls Digit 29 — Powered Exhaust Fan Primary Heat Source Motor (hp) 00 = Non DDC—Electromechanical AA = Trane—Discharge Air Control w/LON Read-Write w/Display ELEC HOT WATER Belt Drive AB = Trane—Space Control w/LON No Heat No Heat No Heat...
  • Page 10 Model Number Descriptions Digit 36 — Electrical Options Terminal Block Non-Fused Disconnect Fused Disconnect Switch Non-Fused Disconnect w/Convenience Outlet Fused Disconnect Switch w/Convenience Outlet Dual Point Power Dual Point Power w/Convenience Outlet 65 SCCR Electrical Rating w/Non-Fused Disconnect 65 SCCR Electrical Rating w/Fused Disconnect 65 KAIC Electrical Rating w/Non-Fused Disconnect...

  • 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 Space Temperature / RH Sensor (Optional) Through the Base Electrical with Disconnect Switch Field installed, wall mounted temperature and humidity sensor (BAYSENS036A) to control space cooling, heating An optional factory installed 3-pole, molded case and dew point. disconnect switch with provisions for through the base electrical connections may be included.

  • Page 13: Unit Inspection

    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. Typical installation clearances for OAB unit WARNING with auxiliary cabinet 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 Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 4. Unit curb data for OAB 3–9 tons with auxiliary cabinet Figure 5. Unit dimensional data for OAB 3–9 tons (in.) Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals. Note: Sound attenuation package will add 17.76 in.

  • Page 16: Indirect-Fired Oag Units

    Unit Clearances, Curb Dimensions, and Dimensional Data Indirect-Fired OAG Units Figure 6. Unit dimensional data for OAB 3–9 tons with auxiliary cabinet (in.) Unit Clearances Figure 7. Typical installation clearances for indirect- fired OAG unit 84" 72" 36" Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.
  • Page 17 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 8. Typical installation clearances for indirect- Figure 10. Unit curb data for indirect-fired OAG with fired OAG unit with auxiliary cabinet auxiliary cabinet (in.) " 70 2 " " " " 117 2 "...
  • Page 18 Unit Clearances, Curb Dimensions, and Dimensional Data Note: Sound attenuation package will add 10.79 in. to the height of the condenser fan section. Refer to project-specific unit submittals. Figure 12. Unit dimensional data for indirect-fired OAG with auxiliary cabinet FRONT VIEW 77.524 74.417 ELECTRIC...

  • Page 19: 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 20 Unit Weight and Rigging Table 2. Typical unit weight, center of gravity, and corner weights (percentage of total weight) - air cooled DX units with powered exhaust but without ERV Weight (lb) Center-of-gravity (in.) Corner weight (% of total weight) Length Width Corner A...

  • Page 21: Rigging

    Unit Weight and Rigging Figure 14. Rigging and center-of-gravity data Figure 13. Cabinet corners 4-point lift OAB and OAG Cabinets - top view Model: OAG SPREADER BARS Intake hood Rigging Figure 14. Rigging and center-of-gravity data DETAIL A SCALE 1 : 12 4-point lift SCREW PIN SHACKLE 4 LOCATIONS...

  • Page 22: 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 23: Oab And Oag If Heater Air Inlet Hood And

    Installation  Assemble and install the roof curb (if applicable). Figure 17. Wind screen 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 24 Installation 3. Attach the flue cover to the heater door using the Figure 22. provided stainless steel screws as shown in Figure Figure 20. 6. Install the heater door on the unit, as shown in Figure 23, p. 24, ensuring that the heater flue extends 4.

  • Page 25: Main Electrical Power Requirements

    Installation Main Electrical Power Requirements Figure 24. Condensate trap installation PANEL ENCLOSURE  Verify that the power supply complies with the unit D" NPT FEMALE CONNECTOR nameplate specifications.  Inspect all control panel components; tighten any loose connections.  Connect properly sized and protected power supply wiring to a field-supplied/-installed disconnect switch and to the main power terminal block (HTB1) in the unit control panel.

  • Page 26: Chilled Water Connection Size And Location

    Installation Chilled Water Connection Size and Figure 27. OAB powered exhaust damper hood, Location collapsed Figure 26. Outdoor air chilled water cooling pipe chase- connections Table 4. Chilled water pipe chase location (in.) Unit 61.25 79.75 12.5 4.125 Table 5. Chilled water connection size (MPT-in.) Unit Size MPT-in.
  • Page 27 Installation Figure 28. OAB powered exhaust damper hood, open Figure 29. OAG powered exhaust damper hood, collapsed OAG Cabinet 2. Lift the hood upward and rotate the side panels outward while holding the top up. 1. To release damper hood, remove the hex head sheet metal screw shown in DETAIL A (see Figure 29) and...

  • Page 28: Field Installed Power Wiring

    Installation Figure 30. OAG powered exhaust damper hood, open AVERTISSEMENT Câblage sur site et mise à la terre corrects nécessaires ! Le non-respect de la réglementation peut entraîner des blessures graves, voire mortelles. Il est IMPÉRATIF de confier l’ensemble du câblage sur site à un électricien qualifié.

  • Page 29: Main Unit Power

    Installation Verify that the power supply available is compatible with the unit’s nameplate ratings. The available supply power AVERTISSEMENT must be within 10 percent of the rated voltage stamped on Câblage sur site et mise à la terre corrects the nameplate. Use only copper conductors to connect the nécessaires ! power supply to the unit.

  • Page 30: Voltage Imbalance

    Installation Voltage Imbalance 226 - 221 100 X = 2.2% WARNING The 2.2 percent imbalance in this example exceeds the Live Electrical Components! maximum allowable imbalance of 2.0 percent. This much imbalance between phases can equal as much as a Failure to follow all electrical safety precautions when 20 percent current imbalance with a resulting increase in exposed to live electrical components could result in...

  • Page 31: Compressor Crankcase Heaters

    Installation Before initial start up, or if main power has been off for an  Observe the ABC and CBA phase indicator lights on extended period of time, compressor crankcase heater(s) the face of the sequencer. The ABC indicator light will should be operated for a minimum of 8 hours prior to glow if the phase is ABC.

  • Page 32: Control Power Transformer

    Installation Control Power Transformer NOTICE Use Copper Conductors Only! WARNING Failure to use copper conductors could result in Hazardous Voltage! equipment damage as unit terminals are not designed Failure to disconnect power before servicing could to accept other types of conductors. result in death or serious injury.

  • Page 33: Dc Conductors

    Installation DC Conductors 1. Below table lists the conductor sizing guidelines that must be followed when interconnecting the DC binary output devices and the system components utilizing a Table 7. Zone sensor module wiring DC analog input\output signal to the unit. Distance from Unit to Control Recommended Wire Size Note: Resistance in excess of 2.5 ohms per conductor...

  • Page 34: 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 35: System Configuration And Pre-Start

    System Configuration and Pre-Start The following procedure must be completed prior to Important: This section is intended to provide performing the startup procedure in “Startup,” p. 38. This guidelines for navigation through the section describes procedures to navigate the various remote operator display screens.
  • Page 36 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 37 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 38: Startup

    Startup Indirect Gas-Fired Heating AVERTISSEMENT Startup Procédures d’entretien dangereuses ! • Les techniciens, afin d’être protégés des éventuels WARNING risques électriques, mécaniques et chimiques, DOIVENT suivre les précautions contenues dans ce Hazardous Service Procedures! manuel, sur les étiquettes et les autocollants, ainsi Failure to follow all precautions in this manual and on que les instructions suivantes : Sauf indication the tags, stickers, and labels could result in death or...

  • Page 39: Startup Procedure

    Open all manual gas valves. Turn power on at unit’s 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 40 Startup Dehumidification, Disable Economizer Mode, Disable modulating heater startup, increase heat output ERV. If two heaters are installed, test heating with split command to 100 percent to start up the second heater. manifold first by overriding burner 2 OFF. Override High Fire and Low Fire Adjustment heating Output Command to 100.0 percent if one To adjust high fire or low fire setting, please refer to...
  • Page 41 Startup surrounding buildings or prevailing winds cause Figure 33. Flame characteristics of properly-adjusted recirculation, a flue extension may be required to natural gas systems prevent recirculation. Contact manufacturer prior 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 42: Safety Controls

    Startup Figure 34. OAB/OAG indirect gas-fired furnace components Ignition Inducer blower Air-proving 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 for natural gas and 10 in.

  • Page 43: 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 44 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 45: Final Process

    Maintenance _____________________________________________________ AVERTISSEMENT _____________________________________________________ Pressions dangereuses ! _____________________________________________________ Tout manquement aux consignes de sécurité _____________________________________________________ préconisées ci-dessous risquerait d’entraîner un — connection(s) 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 46 Maintenance Table 9. Sample maintenance log Refrigerant Circuit #1 Refrigerant Circuit #2 Current Suct. Disch. Liquid Suct. Disch. Liquid Ambient Compr. Press. Press Press Super- Sub-cool Compr. Press. Press Press Super- Sub-cool Psig/kPa Psig/kPa heat F/C Date Temp F/C Oil Level Psig/kPa Psig/kPa Psig/kPa...

  • Page 47: Performance Data

    Performance Data Table 10. OABD general data—cooling 3–5 tons high efficiency 3 Tons 4 Tons 5 Tons OABD036A OABD048A OABD060A Cooling Performance Gross Cooling Capacity, Btu (kW) 41,462 (12.15) 55,709 (16.33) 66,870 (19.60) Nominal cfm (m 500–2000 (850–3398) 500–2000 (850–3398) 500–2000 (850–3398) Compressor Number...
  • Page 48 Performance Data Table 11. OABD general data—cooling 6–9 tons high efficiency 6 Tons 7 Tons 8 Tons 9 Tons OABD072A OABD084A OABD096A OABD108A Cooling Performance Gross Cooling Capacity, Btu (kW) 78,600 (23.04) 88,768 (26.02) 99,099 (29.04) 108,214 (31.71) Nominal cfm (m 625–3000 (1061–5097) 625–3000 (1061–5097) 625–3000 (1061–5097) 625–3000 (1061–5097) Compressor Number...
  • Page 49 Performance Data Table 12. OAGD general data—cooling 10–17 tons high efficiency 10 Tons 12 Tons 15 Tons 17 Tons OAGD120A OAGD144A OAGD180A OAGD210A Cooling Performance Gross Cooling Capacity, Btu (kW) 150,692 (44.16) 165,990 (48.65) 206,544 (60.53) 230,212 (67.47) Nominal cfm (m 1250–2500 (2124–4248) 1500–3000 (2549–5097) 1875–3750 (3186–6371) 2125–4250 (3610–7221) Compressor Number...
  • Page 50 Performance Data Table 13. OAGD general data—cooling 20–30 tons high efficiency 20 Tons 22 Tons 25 Tons 30 Tons OAGD240A OAGD264A OAGD300A OAGD360A Cooling Performance Gross Cooling Capacity, Btu (kW) 286,302 (83.91) 319,026 (93.50) 368,012 (107.85) 395,596 (115.94) 2500–5000 2750–5500 3125–6250 3750–7500 Nominal cfm (m...

  • Page 51: Superheat And Refrigeration Circuit Data

    Performance Data Superheat and Refrigeration Figure 36. Refrigeration diagram: single compressor Circuit Data with reheat Figure 35. Refrigeration diagram: single compressor without reheat OAU-SVX02F-EN...
  • Page 52 Performance Data Figure 37. Refrigeration diagram: dual compressor Figure 38. Refrigeration diagram: dual compressor with without reheat reheat OAU-SVX02F-EN...

  • Page 53: 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 54 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 55: Rtrm Failure Modes

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

  • Page 56: Appendix

    Appendix OAU Filter Guide Table 16. OAB units Evaporator Thickness MERV Height Width 2 in. 8, 13 4 in. Auxiliary Module Return Air Thickness MERV Height Width 2 in. Outside Air Thickness MERV Height Width 2 in. (a) No filters will be provided on the outside air path of the auxiliary module if electric preheat is provided.

  • Page 57: Field Installation Of Factory-Provided Sensors

    Appendix Field Installation of Factory- Provided Sensors Figure 39. VELSEN-0021 installation instructions OAU-SVX02F-EN...
  • Page 58 Appendix Figure 40. BAYSENS036A installation instructions OAU-SVX02F-EN...
  • Page 59 Appendix Figure 41. MZVAV DSPS document OAU-SVX02F-EN...
  • Page 60 Appendix Figure 42. VELCON-0350 installation instructions for modulating OA/RA dampers w/economizer and an exhaust fan OAU-SVX02F-EN...

  • Page 61: Horizon™ Dedicated Outdoor Air Unit Startup Form

    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 62 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 63 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 64 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.

This manual is also suitable for:

Horizon seriesHorizon oabdHorizon oagdHorizon oage

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