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Trane Horizon OADG Series Installation, Operation And Maintenance Manual

Outdoor air unit, indirect fired gas/electric heat/air source heat pump
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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..
June 2021
SAFETY WARNING
AVERTISSEMENT DE SÉCURITÉ
OAU-SVX006E-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. This includes working knowledge of the Tracer TU program.
  • 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 • All Trane personnel must follow the company’s matériels. Le système contient de l’huile et du fluide Environmental, Health and Safety (EHS) policies frigorigène sous haute pression. Avant d’ouvrir le when performing work such as hot work, electrical, circuit, récupérez le fluide frigorigène pour éliminer...
  • 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 Curb Dimensions ....17 ....9 Horizon Outdoor Air Unit Dimensional Data .
  • Page 7 Table of Contents Safety Controls ..... 57 VAV .......79 Supply Fan Tracking for Exhaust Fan (Field .
  • Page 8 Sensor Source Failures ....87 Economizer Fault Detection and Diagnostics ® Trane Horizon™ DOAS ....88...

  • Page 9: 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 Glycol/Chilled Water Coil—6-...
  • Page 10 Model Number Descriptions BM = Dual 22-in.—60% Width Wheel Discharge Air Control = No Secondary Heat BN = Dual 25-in. Wheel Multi-Zone VAV BP = Dual 25-in.—60% Width Wheel Single-Zone VAV = 5 kW Digit 25 — Exhaust Fan Motor Digit 32 —...
  • Page 11 Model Number Descriptions Digit 34 — Energy Recovery Digit 42 — Corrosive Digit 54 — Cooling Controls Environment Package No Energy Recovery No ReliaTel™ ERV—Composite Construction  ReliaTel™ No Corrosive Package with Bypass for Frost Protection ReliaTel™ with BCIR Card Eco Coated Coils ERV—Composite Construction ...

  • Page 12: 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 13: Space Temperature / Rh Sensor (Optional)

    General Information On dual circuit units, if the high pressure control opens, draining internal condensate. External flue to be the compressor on the affected circuit is locked out. A constructed of type 304 stainless steel. manual reset for the affected circuit is required. Units will be suitable for use with natural gas or Liquid Propane (LP) gas.

  • Page 14: Hot Water Coils

    General Information Hot Water Coils  If concealed damage is discovered, notify the carrier’s terminal of damage immediately by phone and by This option shall consist of a hot water coil located in the mail. Concealed damage must be reported within primary heat position.

  • Page 15: Unit Clearances

    General Information Unit Clearances “Unit Clearances, Curb Dimensions, and Dimensional Data,” p. 16 contains figures that illustrate the minimum operating and service clearances for either a single or multiple unit installation. These clearances are the minimum distances necessary to assure adequate serviceability, cataloged unit capacity, and peak operating efficiency.

  • Page 16: 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 17: 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 18: 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 19 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 20 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 21: 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 22 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 23 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 24 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 25: 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 26 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 27 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 28 Unit Weight and Rigging Before proceeding, refer to Table 1, p. Table 2, p. 26 Figure 28. Ten-point lift (OAN cabinet with exhaust fan Table 3, p. 26 for typical unit operating weights and and no ERV) Figure 23, p. 27 for rigging drawing.

  • Page 29: 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 30: General Unit Requirements

    Installation Main Electrical Power Requirements Figure 31. Extreme transition in duct work  Verify that the power supply complies with the unit 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 31: Hot Water Connection Size And Location

    Installation Figure 32. Condensate trap installation Figure 34. OAN water inlet and outlet, in. (cm) INSTALLING CONTRACTOR TO CUT HOLES IN CABINET SIDE PANEL FOR WATER PIPE PENETRATION (3" NOMINAL MNPT) D = Pipe diameter; refer to Figure 38, p. 33 for correct pipe diameter H = Internal static pressure (in wg) +1 in.

  • Page 32: Filter Installation

    Installation Figure 38, p. 33. To ensure that the unit’s supply power Table 4. Chilled water pipe chase location, in. (cm) wiring is properly sized and installed, refer to the following guidelines. Unit 64.25 (163.2) 30.00 (76.2) 18.00 (45.7) 3.50 (8.9) Figure 36.
  • Page 33 Installation Figure 38. OAD utility connections, in. (cm) Figure 39. OAN utility connections, in. (cm) Electric 27.000 Disconnect (68.6) 49.446 (125.6) 22.446 (57.0) 7.500 (19.1) 8.500 Gas Inlet (21.6) 1.5 in. NPT (3.8 cm) Condensate Drain CONDENSATE DRAIN 5.541 1 in. NPT (2.5 cm) O 1.5000 NPT (14.1) 15.000 (38.1)

  • Page 34: Main Unit Power

    Installation Main Unit Power The electrical service must be protected from over current and short circuit conditions in accordance with NEC requirements. Protection devices must be sized according to the electrical data on the nameplate. WARNING 1. Location of the applicable electrical service entrance is Hazardous Voltage! illustrated in Figure 38, p.

  • Page 35: Electrical Phasing (Three-Phase Motors)

    Installation Voltage Imbalance VD (reading farthest from average) = 221 The percentage of Imbalance equals: WARNING 226 - 221 100 X = 2.2% Live Electrical Components! Failure to follow all electrical safety precautions when The 2.2 percent imbalance in this example exceeds the exposed to live electrical components could result in maximum allowable imbalance of 2.0 percent.

  • Page 36: 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 37: 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 38: Dc Conductors

    Installation DC Conductors refer to Figure 38, p. 33 for the electrical access locations provided on the unit. Table 7 lists the conductor sizing guidelines that must Table 7. Zone sensor module wiring be followed when interconnecting the DC binary Distance from Unit to Control Recommended Wire Size output devices and the system components utilizing a...

  • Page 39: Pre-Start Check List

    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 40: 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. 52. 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 41 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Hardwired input from factory installed piezo Exhaust Fan Piezo differential AI-09 0–25 in.H2O Pressure Local pressure sensor (EPZ). Hardwired input from factory outdoor air flow monitoring AI-10 Outdoor Air Flow Local...
  • Page 42 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Hot Gas Reheat Valve AO-01 0–100 Analog hot gas reheat output. Command Supply Fan Speed AO-02 0–100 Supply fan speed output. Command Speed control for circuit 1 digital scroll or variable Compressor Speed...
  • Page 43 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Supply Fan Air Flow Setpoint used for supply fan during heating mode Minimum Setpoint - (not heat AV-13 Varies Heating Mode pump).
  • Page 44 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Actively used supply airflow. Calculated using the Supply Fan Air Flow supply AV-41 0–26000 Active fan piezo pressure. Space CO2 AV-42 ●...
  • Page 45 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Outdoor Air Enthalpy AV-68 BTU/lb Actively used outdoor air enthalpy. Active Outdoor Air Flow AV-71 ● 0–25000 Setpoint to modulate the dampers. Setpoint BAS Return Air Enthalpy AV-72...
  • Page 46 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description Auto Reset. Notificaiton when differential Energy Recovery Wheel presssure switch 0=Clean BI-12 Outdoor Air Filter 1=Clogged closes (adj. range) for the filters before ERV on Status outdoor air side.
  • Page 47 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description 0=Off Compressor 2 BO-12 Enable for compressor 2. Command 1=On Enable for electric pre-heat located in front of 0=Off energy BO-13 Pre-Heat Enable...
  • Page 48 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description 0=Off Unoccupied Dehumid BV-40 Dehumidification mode status during unoccupied. Mode 1=On Status indicating when actively bypassing or Energy Recovery Frost 0=Normal BV-41 slowing down energy recovery wheel to prevent...
  • Page 49 System Configuration and Pre-Start Table 8. Chart of analog and binary input/output (continued) BACnet Point Name Write Default Range Units Description MV-10 Supply Fan Wheel Size – Factory set supply fan size. MV-11 Direct Fired Burner Size – Factory set direct fired burner size. MV-12 Exhaust Fan Wheel Size –...

  • Page 50: 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 51 System Configuration and Pre-Start b. Override Circuit 1 to 0%. 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-SVX006E-EN...

  • Page 52: Startup

    Startup Indirect Fired Gas Heating Startup AVERTISSEMENT Procédures d’entretien dangereuses! WARNING Le non-respect de toutes les précautions contenues Hazardous Service Procedures! dans ce manuel ainsi que sur les étiquettes et les autocollants peut entraîner des blessures graves voire Failure to follow all precautions in this manual and on mortelles.

  • Page 53: Startup Procedure

    Startup 2. BEFORE OPERATING, leak test all gas piping up to d. Slowly rotate IFFS switch clockwise (lightly tapping heater gas valve. Smell around the unit area for gas. If the IFFS after each full turn) until IFFR relay is not lit. gas is smelled, do NOT attempt to place heater in e.
  • Page 54 Open gas supply manual shut- For units including an additional separate On-Off off valve. Using unit display (or computer with Trane heater, set heat command output to 49 percent to run Tracer TU), proceed to System Status Display and modulating heater startup.
  • Page 55 Startup High Fire and Low Fire Adjustment Figure 41. Flame characteristics of properly-adjusted To adjust high fire or low fire setting, please refer to natural gas systems EXA STAR Modulating Valve document. This document will ship with all gas heat units. Failure to Ignite •...
  • Page 56 Startup surrounding buildings or prevailing winds cause recirculation, a flue extension may be required to 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 57 Startup Safety Controls Air Pressure Switch. An air pressure switch is provided as part of the control system to verify airflow through draft inducer by monitoring the difference in pressure between the draft inducer and the atmosphere. If sufficient negative pressure is not present, indicating lack of proper air movement through heat exchanger, the switch opens shutting off gas supply though the ignition control...
  • Page 58 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 59 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 Pressures! instructions as closely as possible to avoid damaging the coils.
  • Page 60 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 61 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 62 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 63 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 64 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 65 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 66 General Data Superheat and Refrigeration Figure 44. Refrigeration diagram: Tandem compressor Circuit Data with reheat Figure 43. Refrigeration diagram: Tandem compressor without reheat OAU-SVX006E-EN...
  • Page 67 General Data Figure 45. Refrigeration diagram: ASHP Tandem Figure 46. Refrigeration diagram: ASHP Tandem compressor without reheat compressor with reheat OAU-SVX006E-EN...
  • Page 68 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 69 Alarms and Troubleshooting Table 14. Diagnostic values Name Manual or Auto Reset Possible Causes • VFD not operating OA and/or RA dampers not operating properly Manual Reset. Occurs when the • Indoor Fan Motor Failure supply fan is commanded on but •...
  • Page 70 Alarms and Troubleshooting Table 14. Diagnostic values (continued) Name Manual or Auto Reset Possible Causes • BAS communication down Auto Reset. Occurs when the space • Failed sensor or improper sensor installation Diagnostic: Space Humidity BV-19 humidity active falls outside of •...
  • Page 71 Alarms and Troubleshooting Table 14. 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 72 Alarms and Troubleshooting RTRM Failure Modes Condenser Fan VFD Troubleshooting Table 15. Status indications WARNING Upper Row Drive Output Live Electrical Components! String Description Stage Failure to follow all electrical safety precautions when The drive is inhibited and cannot be exposed to live electrical components could result in run.
  • Page 73 Appendix OAU Filter Guide Table 16. 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 74 Appendix Field Installation of Factory- Provided Sensors Figure 47. VELSEN-0021 installation instructions OAU-SVX006E-EN...
  • Page 75 Appendix Figure 48. BAYSENS036A installation instructions OAU-SVX006E-EN...
  • Page 76 Appendix Figure 49. Supply duct static pressure transducer (SDPC) OAU-SVX006E-EN...
  • Page 77 Appendix Figure 50. Return duct/space pressure transducer (RDSPC) 1 2 3 OAU-SVX006E-EN...
  • Page 78 Attention Startup or Service Technician Horizon UC600 v11.0 Released dehumidification mode the unit will reset the evaporator setpoint by comparing the space conditions to the The programming has gone through an overhaul. Take a setpoints. Previously a fixed setpoint for the evaporator moment to read through the Sequence of Operation temperature was used during dehumidification.
  • Page 79 Attention Startup or Service Technician Space Control or Single Zone VAV and OA Expanded Fallback Control Setpoints Where possible, the unit will fall back to other methods of control when it detects a failed sensor. A diagnostic is Space Control or Single Zone VAV will no longer use the displayed for the sensor when another sensor is being outdoor air setpoints if the unit has an ERV, or if the unit is used.
  • Page 80 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 Occupied operation begins when the unit is placed in inputs, points ending with “Active” are determined by the Occupied via BAS or when OAUTS-7 &...
  • Page 81 Sequence of Operation Single Zone VAV Control Multi-Zone VAV Control After completing the starting sequence, the unit adjusts Ventilation Mode locked out. supply fan speed to maintain Space Temperature Active to Space Control Space Temperature Setpoint Active. When the unit is in Dehumidification Mode, the unit adjusts the supply fan Ventilation Mode is enabled when the Outdoor Air speed to maintain the Space Dewpoint to the Space...
  • Page 82 Sequence of Operation Space Control or Single Zone VAV Control Allowed, Outdoor Air Temperature Active is recorded as Heat Pump Fail Switch Point. Heat pump operation is re- with No Energy Recovery Wheel and 100% attempted when the temperature rises by 5°F. Outdoor Air The unit switches Auxiliary Heating Mode to Allowed Heating Mode is enabled whenever the Outdoor Air...

  • Page 83: Multi-Zone Vav Control

    Sequence of Operation Space Control or Single Zone VAV Control, Setpoint Active, which is written to by Dehumidification Temperature Setpoint (adjustable). Hot Gas Reheat Valve with Energy Recovery Wheel or has Mixed Command (if installed) is adjusted to maintain Discharge Air Temperature Setpoint Active.

  • Page 84: Supplemental Hot Water Reheat

    Sequence of Operation be used to maintain the Discharge Air Temperature operation, the position is modulated to maintain the Setpoint Active. Discharge Air Temperature Setpoint Active for variable effectiveness capacity control. Once the bypass damper Supplemental Hot Water Reheat becomes fully closed, the primary heater will be engaged. If the Hot Gas Reheat Valve Command is at 100%, the hot Energy Wheel Without VFD water valve is energized with Heating Capacity at 0%.

  • Page 85: Outdoor Airflow Monitoring

    Sequence of Operation Outdoor Airflow Monitoring section the Outdoor Air Damper Position Command will open to the Outdoor Air Damper Maximum Position Units with Outdoor Air Flow Local In Service and Setpoint. Modulating Dampers installed will modulate the Outdoor No Return Air Damper Installed Air Damper Position Command the Outdoor Air Minimum Flow Setpoint.
  • Page 86 Sequence of Operation Condensate Detection Input will display a fault when Diagnostic: [High, Low] Discharge Air Temp Lockout the switch located in the condensate pan for the indoor coil is displayed when the Discharge Air Temperature Local is has tripped. [above 128°F, below 35°F] for a duration of 10 minutes.

  • Page 87: Sensor Source Failures

    Sequence of Operation Sensor Source Failures The following diagnostics are displayed when the respective sensor reading is outside of the expected range, indicating that the sensor may be faulty. Refer to the points list for expected ranges of each input. In some cases, a BAS point is In Service, and will take priority over a hardwired input.

  • Page 88: Trane ® Horizon™ Doas

    Startup 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 ...

  • Page 89: Voltages

    Startup Form Verify Indoor Fan Failure Switch (OAB, or OAG Verify Indoor Fan Failure Switch (OAD, OAK or OAN   cabinets with UC600 controls) cabinets with UC600 controls and all units without UC600) 1. Note the minimum of Analog Values labelled Supply Fan Air Flow Minimum Setpoint –...

  • Page 90: Motor Data

    Startup 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 91: Test Procedures

    Startup Form Refrigeration Startup b. Water Source Heat Pump. i. Verify proper water flow through water coil. Test Procedures 7. Adjust charge until subcooling is 10-15. Important: Cooling startup can only be completed if the 8. Record all readings. OA temp is >65°f or <105°F. Heating startup 9.

  • Page 92: Furnace Data

    Startup Form Indirect Fired Gas Heat Startup 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 93: Program Control Type (Mv-13)

    Startup 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 Program Control Type (MV-13) change the operation.
  • Page 94 Startup 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 AV-29 45–100 °F Enable Setpoint be locked into Cooling Mode. When the Outdoor Air Temperature is below this setpoint, the unit will Outdoor Air Heating AV-33...
  • Page 95 Startup 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-SVX006E-EN...
  • Page 96 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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Horizon oang series

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