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Trane Horizon OABE/F Series Installation, Operation And Maintenance Manual
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Trane Horizon OABE/F Series Installation, Operation And Maintenance Manual

Outdoor air unit water source heat pump
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Installation, Operation, and Maintenance
Horizon™ Outdoor Air Unit
Water Source Heat Pump
Models: OABE/F, OAGE/F, OAKE/F, OANE/F
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.
June 2023
SAFETY WARNING
AVERTISSEMENT DE SÉCURITÉ
OAU-SVX004G-EN

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Summary of Contents for Trane Horizon OABE/F Series

  • Page 1 Installation, Operation, and Maintenance Horizon™ Outdoor Air Unit Water Source Heat Pump Models: OABE/F, OAGE/F, OAKE/F, OANE/F 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.

  • Page 2: Warnings, Cautions, And Notices

    Chlorine, Fluorine and Carbon (CFCs) and those containing 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. Important Responsible Refrigerant Practices...
  • 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 Never solder, braze or weld on refrigerant lines or any unit components that are above atmospheric pressure • All Trane personnel must follow the company’s or where refrigerant may be present. Always remove Environmental, Health and Safety (EHS) policies refrigerant by following the guidelines established by...
  • Page 5 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 AVERTISSEMENT without written permission. Trane reserves the right to revise this publication at any time, and to make changes to its content Risque d’explosion et gaz mortels !
  • Page 6 Table of Contents Model Number Descriptions OABE Units ......17 ....9 Horizon Outdoor Air Unit Water Source Heat Indirect-Fired OAGE Units .
  • Page 7 Table of Contents DC Conductors ......52 Gas Heater Staging Off at Minimum Capacity . Factory-Provided Sensors .
  • Page 8 ......103 Discharge Air Control ....98 Trane® Horizon™ DOAS ....103 Multi-Zone VAV Control .

  • Page 9: Model Number Descriptions

    Model Number Descriptions Horizon Outdoor Air Unit Water Source Heat Pump Model: OABE, OAGE Digit 1, 2 — Unit Type Digit 15 — Refrigerant Capacity Digit 22 — Heat Capacity (Primary Control Heat Source) OA = Outdoor Air No RCC Valve Digit 3 —...
  • Page 10 Digit 31 — ERV (Requires Powered Digit 36 — Electrical Options Exhaust) 00 = Non-DDC—Electromechanical Terminal Block AA = Trane—Discharge Air Control Non-Fused Disconnect Switch No ERV w/LON Read-Write w/Display Fused Disconnect Switch ERV-Composite Construction AB = Trane—Space Control w/LON...
  • Page 11 Model Number Descriptions Models: OADE, OAKE, OANE Digit 1, 2 — Unit Type Digit 14 — Condenser Digit 20 — Heat Type (PRI/SEC) OA = Outdoor Air Water-Cooled DX Condenser No Heat Copper/Steel Indirect-Fired (IF) Digit 3 — Cabinet Size Water-Cooled DX Condenser Electric—Staged 625 cfm–4,000 cfm...
  • Page 12 Digit 25, 26 — Unit Controls Digit 30 — Reserved for Future Use Heat Source 00 = Non DDC—Electromechanical Digit 31 — ERV (Requires Powered AA = Trane—Discharge Air Control Exhaust) ELEC HOT WATER w/LON Read-Write w/Display No Heat No Heat No Heat...
  • Page 13 Model Number Descriptions Digit 36 — Electrical Options 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 14: General Information

    General Information Overview of Manual Indoor Fan Failure Input Note: One copy of this document ships inside the control The Indoor Fan Failure Switch (IFFS) is connected to verify panel of each unit and is customer property. It must be indoor fan operation.
  • Page 15 General Information High Temperature Sensor will be provided from the switch to the unit high voltage terminal block. The switch will be UL/CSA agency recognized. The Discharge Air Temperature Sensor (DTC) supplies a Through the Base Gas Piping continuous signal to the MCM. Factory setting for Discharge Air Temperature (DTC) Discharge Air Temperature Setpoint The unit will include provisions for installing through the base Maximum (MDTS) is 120°F, the unit will be shut down, and...

  • Page 16: Unit Inspection

    General Information Unit Inspection • Operations such as sawing, blowing, tear-out, and spraying may generate fiber concentrations requiring additional respiratory protection. Use the appropriate NIOSH approved respiration in these situations. WARNING First Aid Measures Fiberglass Wool! Product may contain fiberglass wool. Disturbing the Eye Contact insulation in this product during installation, Flush eyes with water to remove dust.
  • Page 17 Unit Clearances, Curb Dimensions, and Dimensional Data Outdoor WSHP Units Figure 1. Typical installation clearances for OABE unit WARNING Combustible Materials! Failure to maintain proper clearance between the unit 4'-0" heat exchanger, vent surfaces and combustible materials could cause a fire which could result in death or serious injury or property damage.

  • Page 18: Dimensional Data

    Unit Clearances, Curb Dimensions, and Dimensional Data Curb Dimensions Dimensional Data Figure 3. Unit curb data for OABE 3 to 9 tons Figure 5. Unit dimensional data for OABE 3 to 9 tons (in.) " 2 " GUTTER B DETAIL 10 "...
  • Page 19 Unit Clearances, Curb Dimensions, and Dimensional Data Indirect-Fired OAGE Units Figure 6. Unit dimensional data for OABE 3 to 9 tons with auxiliary cabinet (in.) Unit Clearances Figure 8. Typical installation clearances for indirect- fired OAGE unit (in.) Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.
  • Page 20 Unit Clearances, Curb Dimensions, and Dimensional Data Curb Dimensions Figure 9. Typical installation clearances for indirect- fired OAGE unit with auxiliary cabinet (in.) Figure 10. Unit curb data for indirect-fired OAGE (in.)   '(7$,/ '  3,3( &+$6( *877(5 6&$/(       ...
  • Page 21 Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 13. Unit dimensional data for indirect-fired OAGE with auxiliary cabinet (in.) Figure 12. Unit dimensional data for indirect-fired OAGE (in.) FRONT VIEW 87.42 74.41 FRONT VIEW 87.42 74.41 73.06 36.03 73.06 ELECTRIC DISCONNECT...
  • Page 22 Unit Clearances, Curb Dimensions, and Dimensional Data OAKE Units Figure 15. Typical installation clearances for OAKE unit with auxiliary cabinet (in.) Unit Clearances Figure 14. Typical installation clearances for OAKE unit (in.) Note: Certain options require auxiliary cabinet. Refer to project-specific unit submittals.
  • Page 23 Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 17. Unit curb data for OAKE 12 to 30 tons with auxiliary cabinet (in.) Figure 18. Unit dimensional data for OAKE 12 to 30 tons (in.) GUTTER A DETAIL GUTTER B DETAIL 2½...
  • Page 24 Unit Clearances, Curb Dimensions, and Dimensional Data OANE Units Figure 19. Unit dimensional data for OAKE 12 to 30 tons with auxiliary cabinet (in.) Unit Clearances FRONT VIEW Figure 20. Typical installation clearances for OANE unit 86.394 (in.) 60.467 83.565 67.943 81.536 26.046...
  • Page 25 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 21. Typical installation clearances for OANE unit Figure 23. Unit curb data for OANE 30 to 54 tons with with auxiliary cabinet (in.) auxiliary cabinet (in.) Gutter A Gutter B Detail Detail 4-1/8 2-1/2 6-1/2...
  • Page 26 Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 25. Unit dimensional data for OANE 30 to 54 tons with auxiliary cabinet (in.) Figure 26. Unit dimensional data for indoor OABE WSHP with horizontal supply and no return FRONT VIEW (in.) 93.405 67.467...
  • Page 27 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 27. Unit dimensional data for indoor OABE Figure 28. Unit dimensional data for indoor OABE WSHP with horizontal supply/return (no ERV WSHP with horizontal supply/return and ERV or exhaust fan) (in.) or exhaust fan (in.) BACK VIEW BACK VIEW 41.250...
  • Page 28 Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 30. Unit dimensional data for indoor OAGE WSHP with horizontal supply/return (no ERV Figure 29. Unit dimensional data for indoor OAGE or exhaust fan) (in.) WSHP with horizontal supply and no return (in.) BACK VIEW BACK VIEW...
  • Page 29 Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 31. Unit dimensional data for indoor OAGE WSHP with horizontal supply/return and ERV Figure 32. Unit dimensional data for indoor OAKE or exhaust fan (in.) WSHP with horizontal supply and no return (in.) BACK VIEW 65.500...
  • Page 30 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 33. Unit dimensional data for indoor OAKE Figure 34. Unit dimensional data for indoor OAKE WSHP with horizontal supply/return (no ERV) WSHP with horizontal supply/return and ERV (in.) BACK VIEW 49.75 BACK VIEW 5.34 5.38 Intake duct...
  • Page 31 Unit Clearances, Curb Dimensions, and Dimensional Data Dimensional Data Figure 36. Unit dimensional data for indoor OANE WSHP with horizontal supply/return (no ERV) Figure 35. Unit dimensional data for indoor OANE (in.) WSHP with horizontal supply and no return (in.) BACK VIEW 57.50 4.96...
  • Page 32 Unit Clearances, Curb Dimensions, and Dimensional Data Figure 37. Unit dimensional data for indoor OANE WSHP with horizontal supply/return and ERV (in.) BACK VIEW 57.50 4.96 5.00 2.79 Intake duct 38.50 Intake duct 50.78 34.25 PE duct 8.14 53.75 6.63 6.63 PE duct BOTTOM VIEW...
  • Page 33 Unit Weight and Rigging Unit Weight WARNING Table 1. Typical unit weights—units without auxiliary Heavy Objects! cabinet Failure to follow instructions below or properly lift unit could result in unit dropping and possibly crushing Operating Weight (lb) Shipping Weight (lb) Model operator/technician which could result in death or Number...
  • Page 34 Unit Weight and Rigging Table 2. Typical unit weights—units with auxiliary Table 3. Typical unit weight—units with horizontal cabinet return section—no auxiliary cabinet Operating Weight (lb) Shipping Weight (lb) Operating Weight (lb) Shipping Weight (lb) Model Model Number Number OABE036* 1657 1841 1905...
  • Page 35 Unit Weight and Rigging Rigging Table 4. Typical unit weights—units with horizontal return section and auxiliary cabinet Figure 38. Rigging Operating Weight (lb) Shipping Weight (lb) Model 4-point lift Number Model: OAB, OAG OABE036* 1657 1841 1905 2089 OABE048* 1674 1858 1922 2106...
  • Page 36 Unit Weight and Rigging Figure 38. Rigging (continued) 2. Rig the unit as shown in Figure 38, p. 35. Attach adequate strength lifting slings to all four lifting brackets in the unit 4-point lift base rail. Do not use cables, chains, or slings except as Model: OAK SPREADER BARS shown.

  • Page 37: Installation

    Installation must be installed and connected to top of roof curb WARNING before the unit is set on curb. 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 38: General Unit Requirements

    Installation Figure 40. Extreme transition in duct work Figure 41. Typical water source heat pump cabinet RETURN DUCT EXTREME TRANSITION IN DUCTWORK CAN CAUSE RESTRICTION. DISCHARGE AIR SENSOR SUPPLY DUCT LOCATION • Discharge Air sensor should be placed in the center of the Figure 1 ductwork at least 4 feet from the unit or after the first 90°...
  • Page 39 Installation Figure 44. Pipe chase panel cover Table 5. WSHP water connection sizes Cabinet Size Tonnage Connection Size (in., MNPT) Pipe Chas Pipe Chase Panel Cover 2. Remove the hex head sheet metal screws from the center drain pan (do not discard) to access the pipe chase panel cover.
  • Page 40 Installation 1. Open the blower compartment and remove the flue, flue Figure 46. Flue cover cover, wind screen, and heater air inlet hood. 2. Open the control panel door and remove the heater door shown in Figure Figure 50. Figure 47. Flue Control panel door...
  • Page 41 Installation Figure 52. Figure 54. 7. Install the heater door on the unit, as shown in Figure 55, 41, ensuring that the heater flue extends through the flue 5. Attach the wind screen to the inside of the heater door opening in the door.

  • Page 42: Carbon Monoxide

    Installation The furnace must be connected to a vent complying with a Figure 56. Vertical venting—Category I recognized standard, or a masonry or concrete chimney lined with a material acceptable to the authority having jurisdiction. 6 ft Min. 6 Ft Min Approved Vent Cap Approved Vent Cap (1.8m)

  • Page 43: Monoxyde De Carbone

    Installation Structure Minimum Clearance AVERTISSEMENT 4 ft (1.2 m) below Monoxyde de carbone ! Door, window or gravity inlet 4 ft (1.2 m) horizontally Le non-respect de ces instructions peut résulter en un 1 ft (305 mm) above empoisonnement au monoxyde de carbone (parmi les Forced air inlet within 10 ft (3 m) 3 ft (0.91 m) above symptômes figurent des étourdissement, une léthargie,...

  • Page 44: Filter Installation

    Installation Chilled Water Connection Size and Pitch drain lines connected to P-Trap at least 1/2 inch for every 10 feet of horizontal run to assure proper condensate flow. Do Location not allow the horizontal run to sag causing a possible double- trap condition which could result in condensate backup due to Figure 59.
  • Page 45 Installation Opening the Collapsed Exhaust Damper Figure 61. OAB powered exhaust damper hood, open Hood OAB Cabinet 1. To release the damper hood, remove the hex head sheet metal screws (one per side) shown in DETAIL A (see Figure 60) and marked by arrow (1). Figure 60.

  • Page 46: Field Installed Power Wiring

    Installation Figure 62. OAG powered exhaust damper hood, Figure 63. OAG powered exhaust damper hood, open collapsed Field Installed Power Wiring 2. Lift the hood upward and rotate the side panels outward while holding the top up. WARNING 3. As shown in DETAIL B (see Figure 63) and marked by Proper Field Wiring and Grounding...
  • Page 47 Installation Figure 65. OAG WSHP utility connections (in.) 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 48: Main Unit Power

    Installation Main Unit Power Figure 67. OAN WSHP utility connections 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.Verify that no power is present with a voltmeter.

  • Page 49: Voltage Imbalance

    Installation Voltage Imbalance AVERTISSEMENT Câblage sur site et mise à la terre WARNING corrects nécessaires ! Live Electrical Components! Le non-respect de la réglementation peut entraîner des Failure to follow all electrical safety precautions when blessures graves, voire mortelles. Il est IMPÉRATIF de exposed to live electrical components could result in confier l’ensemble du câblage sur site à...
  • Page 50 Installation 226 - 221  Restore the main source power and recheck the phasing. 100 X = 2.2% If the phasing is correct, turn main source power off then open the unit main disconnect device cover, remove the phase sequence indicator, reinstall disconnect device The 2.2 percent imbalance in this example exceeds the cover and, leaving disconnect device in the off position, maximum allowable imbalance of 2.0 percent.
  • Page 51 Installation Following crankcase heater warm-up, turn main power disconnect off, and install jumper on E-Stop terminals 9 and 10. AVERTISSEMENT Turn Main disconnect “On”. Risque d’électrocution ! Main Unit Display and ReliaTel Controls Le non-respect de cette consigne peut entraîner des blessures graves, voire mortelles.

  • Page 52: Risque D'électrocution

    Installation DC Conductors Note: Resistance in excess of 3 ohms per conductor may cause component failure due to insufficient AC voltage supply. Table 9. Zone sensor module wiring 3. Be sure to check all loads and conductors for grounds, shorts, and mis-wiring. Distance from Unit to Control Recommended Wire Size 4.
  • Page 53 Installation Figure 68. OAUTS connection B FACTORY SUPPLIED VELCON-0976 JUMPER BAYSENS036A BA/ZPM-SR-ST-D VELSEN-0018 SDPC FOR THUMBWHEEL DO NOT USE (TEMP/HUM TEMPERATURE SENSOR IN COMBO SENSOR) OAUTS BAYSENSE036, INSTEAD USE SPTC SPTC BAYSENSE074. t° VELCON-0608 VELSEN-0024 BAYSENS074A VTSP RHP-3D1B BAYSENS036A VELSEN-0049 (THUMBWHEEL) SPHC DRHC...

  • Page 54: Pre-Start Checklist

    8. Startup appointment with Horizon certified Trane service technician set and confirmed. 9. Test and Balance recommended prior to Start-up. 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 55 System Configuration and Pre-Start The following procedure must be completed prior to Important: This section is intended to provide guidelines performing the startup procedure in “Start-Up,” p. 67. This for navigation through the remote operator section describes procedures to navigate the various displays display screens.
  • Page 56 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Hardwired input from factory outdoor airflow monitoring AI-10 Outdoor Airflow Local –– station (AMS). Hardwired input from field installed discharge air Discharge Air AI-11 -40–150...
  • Page 57 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Speed control for circuit 1 digital scroll or variable speed Compressor Speed AO-03 0–100 Command Circuit 1 compressor. Exhaust Fan Speed AO-04 0–100 Exhaust fan speed output...
  • Page 58 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description AV-16 Occupied Offset ● 0–18 Δ°F Offset used to switch between modes of operation. Supply Fan Speed AV-17 ● 50–100 Setpoint used for constant speed supply fan.
  • Page 59 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description AV-44 Heat Capacity 0–100 Primary heating source capacity. Discharge Air Temperature Setpoint AV-45 ● 120°F 80–120 °F Setpoint used to limit the discharge air temperature reset. Maximum Duct Static Pressure AV-46...
  • Page 60 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Supply Fan Airflow Actively used setpoint. Controlled by program from Minimum Setpoint AV-74 0–25000 minimum setpoints for heating and cooling mode. Active Outdoor Air Temperature AV-75...
  • Page 61 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description 0=Off Status of the exhaust fan using a differential pressure BI-14 Exhaust Fan Status 1=On switch. 0=Off Status of the energy recovery wheel using a proximity Energy Recovery Wheel BI-15 Rotation Status...
  • Page 62 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Energy Recovery Wheel BO-15 0=Off 1=On Enable for energy recovery wheel. Start Stop Command 0=Heating Output used to switch between heat pump and cooling on Circuit 1 Reversing Valve BO-16 Command...
  • Page 63 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description 0=Off Status for free cooling mode, using outdoor air BV-44 Free Cooling Mode 1=On temperature to maintain setpoint. 0=DryBulb Used to switching between dry bulb or enthalpy BV-45 Economizer Control Type...
  • Page 64 System Configuration and Pre-Start Table 10. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description 1 = Space Control 2 = Discharge Control 3 = Single Zone VAV 4 = Multi Zone MV-13 Program Control Type ●...

  • Page 65: Pre-Start-Up

    System Configuration and Pre-Start Pre-Start Up Start-up 1. Perform Test and Balance before start-up (if possible). 2. Set up Date and Time for unit, helps with diagnosis when looking at alarms and data logs. 3. Check points of interest sheet and confirm in/out of service points.
  • Page 66 System Configuration and Pre-Start c. Override HGRH to 100%. d. Maintain head pressure 400 psi. e. Record electrical data, refrigerant pressures, saturated temps and line temps on Horizon. Start Up sheet (available at the end of this document). OAU-SVX004G-EN...

  • Page 67: Risque D'explosion

    Start-Up Note: Refer to “Start-up Form,” p. 103 for a copy of the startup form. AVERTISSEMENT Procédures d’entretien dangereuses ! Indirect Gas-Fired Heating Start- • Les techniciens, afin d’être protégés des éventuels risques électriques, mécaniques et chimiques, DOIVENT suivre les précautions contenues dans ce manuel, sur les étiquettes et les autocollants, ainsi WARNING que les instructions suivantes : Sauf indication...

  • Page 68: Tools Required

    Start-Up 3. Use only hand force to operate the gas control lever to the Verify Indoor Fan Failure Switch (OAD, OAK or OAN “ON” position. NEVER use tools. If lever does not operate cabinets with UC600 controls and all units without by hand, replace gas valve prior to staring the unit.
  • Page 69 100 percent to disconnect switch. Open gas supply manual shut-off valve. start up the second heater. Using unit display (or computer with Trane Tracer TU), proceed to System Status Display and Override all High Fire and Low Fire Adjustment...
  • Page 70 Start-Up Contact manufacturer prior to making any flue Figure 69. Flame characteristics of properly-adjusted adjustments. natural gas systems • 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. Inspect draft fan assembly and be sure fan blade is secure to motor shaft.

  • Page 71: Safety Controls

    Start-Up Figure 70. OAB/OAG/OAK/OAN 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 72: Monthly Maintenance

    Maintenance Cooling/Heating Season Make sure all personnel are standing clear of the unit before proceeding. The system components will start when the power • Check the unit’s drain pans and condensate piping to is applied. ensure that there are no blockages. Monthly Maintenance •...

  • Page 73: Final Process

    Maintenance Final Process cleaning equipment. Improper selection can result in damage to the coil and/or health hazards. Clean the coil from the leaving air-side so that foreign material will be washed out of For future reference, you may find it helpful to record the unit the coil rather than pushed further in.

  • Page 74: Performance Data

    Performance Data Table 12. OABE general data—cooling 3 to 5 tons high efficiency 3 Tons 4 Tons 5 Tons OABE036A OABE048A OABE060A Performance Gross Cooling Capacity, Btu (kW) 41,800 (12.25) 57,439 (16.83) 70,304 (20.60) Gross Heating Capacity, Btu (kW) 36,779 (10.78) 44,667 (13.09) 63,402 (18.58) Nominal cfm (m...
  • Page 75 Performance Data Table 13. OABE general data—cooling 6 to 9 tons high efficiency (continued) 6 Tons 7 Tons 8 Tons 9 Tons OABE072A OABE084A OABE096A OABE108A Indoor Coil Type High Performance High Performance High Performance High Performance Tube Size—OD, in. (mm) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7)
  • Page 76 Performance Data Table 14. OAGE general data—cooling 10 to 17 tons high efficiency (continued) 10 Tons Downflow 12 Tons Downflow 15 Tons Downflow 17 Tons Downflow OAGE120 OAGE144 OAGE180 OAGE210 Motor HP (kW), Standard–Oversized 2.67–8 (1.96–5.88) 2.67–8 (1.96–5.88) 2.67–8 (1.96–5.88) 2.67–8 (1.96–5.88) Motor RPM 1750–3500...
  • Page 77 Performance Data Table 16. OAKE general data—cooling 12–20 tons high efficiency 12 Tons Downflow 15 Tons Downflow 17 Tons Downflow 20 Tons Downflow OAKE144A OAKE180A OAKE210A OAKE240A Performance Gross Cooling Capacity, Btu (kW) 164,280 (48.15) 208,912 (61.23) 239,236 (70.11) 279,374 (81.88) Gross Heating Capacity, Btu (kW) 148,018 (43.38) 190,654 (55.88)
  • Page 78 Performance Data Table 17. OAKE general data—cooling 22 to 30 tons high efficiency 22 Tons Downflow 25 Tons Downflow 30 Tons Downflow OAKE264A OAKE300A OAKE360A Performance Gross Cooling Capacity, Btu (kW) 314,806 (92.26) 348,788 (102.22) 394,638 (115.66) Gross Heating Capacity, Btu (kW) 289,850 (84.95) 328,446 (96.26) 368,582 (108.02)
  • Page 79 Performance Data Table 18. OANE general data—cooling 30 to 40 tons high efficiency 30 Tons Downflow 35 Tons Downflow 40 Tons Downflow OANE360A OANE420A OANE480A Performance Gross Cooling Capacity, Btu (kW) 407,716 (119.49) 481,429 (141.09) 487,406 (142.84) Gross Heating Capacity, Btu (kW) 371,280 (108.81) 471,287 (138.12) 477,756 (140.02)
  • Page 80 Performance Data Table 19. OANE general data—cooling 45 to 54 tons high efficiency 45 Tons Downflow 50 Tons Downflow 54 Tons Downflow OANE540A OANE600A OANE648A Cooling Performance Gross Cooling Capacity, Btu (kW) 580,516 (170.13) 707,260 (207.28) 762,312 (223.41) Gross Heating Capacity, Btu (kW) 535,250 (156.87) 696,574 (204.15) 722,794 (226.48)
  • Page 81 Performance Data Superheat and Refrigeration Figure 72. Refrigeration diagram: single compressor Circuit Data with reheat Figure 71. Refrigeration diagram: single compressor without reheat OAU-SVX004G-EN...
  • Page 82 Performance Data Figure 73. Refrigeration diagram: dual compressor Figure 74. Refrigeration diagram: dual compressor with without reheat reheat OAU-SVX004G-EN...
  • Page 83 Performance Data Figure 75. Refrigeration diagram: triple compressor Figure 76. Refrigeration diagram: triple compressor without reheat with reheat OAU-SVX004G-EN...
  • Page 84 Performance Data Figure 77. Refrigeration diagram: quad compressor Figure 78. Refrigeration diagram: quad compressor without reheat with reheat OAU-SVX004G-EN...

  • Page 85: 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 provide • System status the service personnel with some unit diagnostics and system status information.
  • Page 86 Alarms and Troubleshooting Table 20. Diagnostic values Name Manual or Auto Reset Possible Causes: • VFD not operating OA and/or RA dampers not operating properly • Indoor Fan Motor Failure • Indoor Fan Failure Switch IFFS (pressure) failure Manual Reset. Occurs when the supply •...
  • Page 87 Alarms and Troubleshooting Table 20. Diagnostic values (continued) Name Manual or Auto Reset Possible Causes: • BAS communication down • Failed sensor or improper sensor installation Diagnostic: Space Humidity Source Auto Reset. Occurs when the space BV-19 • Humidity Wiring Polarity sensitive Failure humidity active falls outside of range Occurs when there is a compressor run failure and the discharge air...
  • Page 88 Alarms and Troubleshooting Table 20. Diagnostic values (continued) Name Manual or Auto Reset Possible Causes: • Trips after heat command ON and no GV status offer 1 minute • No gas, low gas pressure or high gas pressure to unit •...
  • Page 89 Alarms and Troubleshooting RTRM Failure Modes WARNING Live Electrical Components! Failure to follow all electrical safety precautions when exposed to live electrical components could result in death or serious injury. When necessary to work with live electrical components, have a qualified licensed electrician or other individual who has been properly trained in handling live electrical components perform these tasks.
  • Page 90 Appendix OAU Filter Guide Table 23. OAKE units Evaporator Table 21. OABE units Thickness MERV Height Width Evaporator 2 in. 8, 13 Thickness MERV Height Width 4 in. 2 in. 8, 13 Auxiliary Module (46XX ERV) 4 in. Return Air Auxiliary Module Thickness MERV...
  • Page 91 Appendix Field Installation of Factory- Provided Sensors Figure 79. VELSEN-0021 installation instructions OAU-SVX004G-EN...
  • Page 92 Appendix Figure 80. BAYSENS036A installation instructions OAU-SVX004G-EN...
  • Page 93 Attention Start-up or Service Technician Horizon UC600 v11.0 Released Previously a fixed setpoint for the evaporator temperature was used during dehumidification. The programming has gone through an overhaul. Take a Minimum Supply Airflow Setpoints moment to read through the Sequence of Operation included in this packet to familiarize yourself with the new operation.

  • Page 94: Hot Water Reheat

    Attention Start-up or Service Technician Discharge Air Temp. Reset for Single Zone Expanded Fallback Control Where possible, the unit will fall back to other methods of control when it detects a failed sensor. A diagnostic is Single Zone VAV controls cooling and heating to constant displayed for the sensor when another sensor is being used.

  • Page 95: Sequence Of Operation

    Sequence of Operation General Occupied Control Text shown in italics are point names in the programming. Starting Sequence Typically, points ending with “Local” are hardwired inputs, Occupied operation begins when the unit is placed in Occupied points ending with “Active” are determined by the program and via BAS or when OAUTS-7 &...

  • Page 96: Economizer Mode

    Sequence of Operation Multi-Zone VAV Control Dehumidification Mode, the unit adjusts the supply fan speed to maintain the Space Dewpoint to the Space Dewpoint Ventilation Mode locked out. Calculated Enable Setpoint. Supply fan speed is limited between Supply Airflow Minimum Space Control Setpoint Active and Supply Airflow Maximum Setpoint (both Ventilation Mode is enabled when the Outdoor Air...

  • Page 97: Cooling Mode

    Sequence of Operation Space Control or Single Zone VAV Control The unit switches Auxiliary Heating Mode to Allowed when the Outdoor Air Temperature Active falls below the Heat Pump with No Energy Recovery Wheel and 100% Disable Temperature Setpoint (adj. 0-60°F, default 25°F). Outdoor Air Water Source Heat Pump Heating Mode is enabled whenever the Outdoor Air...

  • Page 98: Dehumidification Mode

    Sequence of Operation Space Control or Single Zone VAV Control, (adjustable). Hot Gas Reheat Valve Command (if installed) is adjusted to maintain Discharge Air Temperature Setpoint with Energy Recovery Wheel or has Mixed Active. Multi-Zone VAV Control Cooling Mode is enabled according to the graph shown in Dehumidification Mode is enabled whenever the Outdoor Air Figure 81, p.

  • Page 99: Exhaust Fan Operation

    Sequence of Operation Supplemental Hot Water Reheat Energy Wheel Without VFD If the Hot Gas Reheat Valve Command is at 100%, the hot The unit prevents frost accumulation on the ERV by measuring water valve is energized with Heating Capacity at 0%. If Heat the Exhaust Leaving Temperature Local.

  • Page 100: Unoccupied Operation

    Sequence of Operation Optional Field Enabled Features Enable Setpoint. During Unoccupied Heating Mode the unit will run the heat to maintain 90°F for the discharge air temperature. Unoccupied Heating Mode is disabled when the Demand Control CO Ventilation Space Temperature Active rises 2°F above the Unoccupied Modulating dampers are required for CO control.
  • Page 101 Sequence of Operation Compressor Low Ambient Lockout Setpoint and the unit does indicates that there is no flow for 20-seconds. The not have active head pressure control. compressors will be prevented from operating when this diagnostic occurs and will auto-reset once the flow returns. These diagnostic locks out compressor operation.
  • Page 102 Sequence of Operation • Diagnostic: Discharge Air Humidity Source Failure • Diagnostic: Discharge Air Temperature Source Failure • Diagnostic: Duct Static Pressure Source Failure • Diagnostic: Outdoor Airflow Sensor Source Failure • Diagnostic: Outdoor Air Humidity Source Failure • Diagnostic: Outdoor Air Temperature Source Failure •...

  • Page 103: Start-Up Form

    Start-up Form ® Trane Horizon™ DOAS Job Name Unit Serial Number Unit Tag Technician Name   Horizon Tech Training Completed Date Completed: Startup Date To get a digital copy of this form, please email horizonstartup@kccmfg.com. For further questions please contact the factory at 502-493-5757.
  • Page 104 Start-up Form Verify Indoor Fan Failure Switch (OAB, or OAG cabinets Verify Indoor Fan Failure Switch (OAD, OAK or OAN  with UC600 controls)  cabinets with UC600 controls and all units without UC600) 1. Note the minimum of Analog Values labelled Supply Fan Airflow Minimum Setpoint –...

  • Page 105: Motor Data

    Start-up Form Motor Data Rated HP/kW Rated FLA Running FLA Motor Model Number Supply Fan 1 Supply Fan 2 Exhaust Fan 1 Exhaust Fan 2 Condenser Fan 1 Condenser Fan 2 Condenser Fan 3 Condenser Fan 4 Condenser Fan 5 Condenser Fan 6 Compressor Data Model Number...

  • Page 106: Test Procedures

    Start-up Form Refrigeration Start-up i. Reduce condenser fan airflow until liquid line pressure is 375 to 400PSI. Test Procedures b. Water Source Heat Pump i. Verify proper water flow through water coil. Important: Cooling startup can only be completed if the OA temp is >65°f or <105°F.

  • Page 107: Gas Pressure Settings

    Start-up Form Indirect Fired Gas Heat Start-up Furnace Data Serial Number Model Number Furnace 1 Furnace 2 Furnace 3 Gas Pressure Settings Measured Pressure Natural Gas Settings Propane Settings Incoming to Unit 7 – 14 11 – 14 in.H2O Between On/Off & Mod. Valve 10.5 in.H2O Stage 1 Manifold (Low Fire)
  • Page 108 Start-up Form Programming and Commissioning Commissioning Do not attempt to perform commissioning by putting points Out of Service and setting a value. The program looks for points that are In Service or Out of Service to change the operation. Program Control Type (MV-13) Instead, override the analog and binary values to “trick”...
  • Page 109 Start-up Form Typical Setpoints BACnet Point Name Setting Default Range Units Description DISCHARGE AIR CONTROL Outdoor Air Cooling When the Outdoor Air Temperature is above this setpoint, the unit will be locked AV-29 45–100 °F Enable Setpoint into Cooling Mode. Outdoor Air Heating When the Outdoor Air Temperature is below this setpoint, the unit will be locked AV-33...

  • Page 110: Final Notes

    Start-up Form Final Notes Is there something missing or do you have recommendations on improvements? Note here if the outdoor air temperature is too low for cooling testing. Submit completed form to horizonstartup@kccmfg.com Include serial number and job name in subject of email. OAU-SVX004G-EN...
  • Page 111 Notes OAU-SVX004G-EN...
  • Page 112 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. We are committed to using environmentally conscious print practices.

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