Trane BCHE User Manual (English)

Questions and Answers:

J
Jason CaldwellAug 19, 2025
How to troubleshoot a Trane Air Handler motor that fails to start?
- M
  Mr. Gabriel SimsAug 19, 2025
  If the motor in your Trane Air Handler fails to start, several issues could be the cause. First, check for a blown line fuse or an open circuit breaker and replace the fuse or reset the breaker if necessary. Also, inspect the wiring, comparing it with the diagram on the unit to ensure proper connections. Confirm that the current supply matches the motor nameplate recommendations; if not, contact your power company. Finally, check that the fan rotates freely, as mechanical failure could also be the reason.
A
andrewsmithAug 21, 2025
What to do if Trane Air Handler motor does not come up to speed?
- T
  Thomas HarrellAug 21, 2025
  If the motor in your Trane Air Handler isn't reaching full speed, it could be due to low voltage at the motor terminals; check the voltage across the AC line and correct any loss if possible. Another potential cause is undersized line wiring to the motor, which should be replaced with larger wiring.
T
Travis RodriguezAug 23, 2025
What to do if my Trane Air Handler motor runs and then dies down?
- B
  Brian SalazarAug 23, 2025
  If your Trane Air Handler motor starts but then dies down, it could be due to a partial loss of line voltage. Check for loose connections and assess the adequacy of the main power supply.
J
jade31Aug 26, 2025
What to do if the drain pan is overflowing in my Trane Air Handler?
- D
  Douglas ThomasAug 26, 2025
  If the drain pan in your Trane Air Handler is overflowing, it could be due to a few reasons. A plugged drain line is a common cause, so try cleaning it out. Also, check if the unit is level and correct it if it's not. Finally, ensure that the trap is designed according to the unit's installation instructions.
S
Sara JohnsonAug 28, 2025
Why does the motor in my Trane Air Handler overheat?
- P
  Paula FowlerAug 28, 2025
  The motor in your Trane Air Handler might be overheating due to a couple of reasons. It could be overloaded, in which case you should reduce the load or consider replacing it with a larger motor. Another possibility is that the motor fan is clogged with dirt, preventing proper ventilation. To resolve this, remove the fan cover, clean the fan, and then replace the cover.
V
Virginia CarpenterAug 30, 2025
Why is there standing water in the drain pan of my Trane Air Handler?
- C
  Christopher KelleyAug 30, 2025
  Standing water in the drain pan of your Trane Air Handler can occur for several reasons. Check the trap design to ensure it follows the unit's installation instructions. Also, verify that the unit is level and correct it if necessary. A plugged drain line could also be the culprit, so try cleaning it out.
V
Valerie RobertsSep 2, 2025
What causes low water coil capacity in Trane Air Handlers?
- B
  bobby67Sep 2, 2025
  Low water coil capacity in Trane Air Handlers can stem from several factors. These include: * Incorrect airflow: Check the fan's operating condition. * Incorrect water flow: Inspect the water pumps and valves for proper operation and check the lines for obstructions. * Incorrect water temperature: Adjust the chiller or boiler to provide the correct water temperature. * Coil piping issues: Verify the coil piping. * Dirty fin surface: Clean the fin surface. * Incorrect glycol mixture: Verify and adjust the glycol mixture if needed.
D
David Huang Jr.Sep 4, 2025
Why is the refrigerant coil capacity low in my Trane Air Handler?
- L
  Lori NavarroSep 4, 2025
  Low refrigerant coil capacity in your Trane Air Handler could be due to several reasons. These include incorrect airflow (check the fan's operation), a malfunctioning or incorrectly sized expansion valve (check sensing bulb temperature and valve operation), an incorrect refrigerant charge (verify and adjust), or a condensing unit failure (verify its operation). Other potential causes are coil piping issues, a clogged refrigerant line filter (change the filter core), failure of suction/liquid line components (verify their operation), a dirty fin surface (clean it, avoiding steam), or fin frosting (verify defrost cycle and frostat operation, and refrigerant charge).
N
Nicole YoungSep 6, 2025
What causes a wet interior in a Trane Air Handler?
- A
  Alexander AvilaSep 6, 2025
  A wet interior in your Trane Air Handler could be caused by: * Coil face velocity being too high (reduce fan speed). * Improper trap design (design the trap per unit installation instructions). * Drain pan leaks/overflows (repair leaks). * Condensation on surfaces (insulate surfaces).
P
parnoldSep 8, 2025
How to reduce excessive motor noise in a Trane Air Handler?
- N
  nancy70Sep 9, 2025
  To reduce excessive motor noise in your Trane Air Handler, start by tightening any loose motor mounting bolts. Also, check if the fan is rubbing on the fan cover and remove any interference in the motor fan housing.

Trane BCHE Specifications

General

Model	BCHE
Category	Air Handlers
Coil Options	Chilled Water, Hot Water, Steam, DX
Drain Pan	Stainless Steel
Type	Horizontal
Application	Indoor
Static Pressure Capability	Up to 8 in. wg
Access Doors	Hinged
Construction	Galvanized steel casing with double-wall construction

Summary

Safety Warnings

Introduction

Provides an overview of the manual and safety advisories.

Warnings, Cautions, and Notices

Explains the three types of safety advisories used throughout the manual.

Proper Field Wiring and Grounding

Emphasizes mandatory qualified personnel for field wiring to prevent death or serious injury.

Personal Protective Equipment (PPE)

Stresses the necessity of proper PPE to prevent death or serious injury during work.

Introduction

Follow EHS Policies

Instructs personnel to follow company EHS policies for safety, superseding local regulations if more stringent.

Model Number Description

General Information

Pre-Installation

Receiving and Handling

Guides on inspecting, handling, and documenting any shipping damage upon unit delivery.

Jobsite Storage

Details requirements for proper indoor storage to protect equipment from vandalism and weather.

Outdoor Storage

Provides recommendations for preventing damage if indoor storage is not possible.

Pre-Installation

Site Preparation

Outlines requirements for installation site support, space, piping, ductwork, and leveling.

Dimensions and Weights

Service Clearances

Illustrates recommended service clearances required around the unit for access and maintenance.

Dimensions and Weights

Horizontal Blower Coil

Provides a diagram and dimensions for the BCHE horizontal blower coil unit.

Dimensions and Weights

Vertical Blower Coil

Illustrates the BCVE vertical blower coil unit, size 24-60, with key components labeled.

Options

Angle Filter and Mixing Box

Shows diagrams and dimensions for combination angle filter and mixing box options.

Options

Bottom/Top Access Filter Box

Provides diagrams and dimensions for the bottom or top access filter box option.

Options

Return and Discharge Attenuators

Illustrates dimensions and weights for return and discharge attenuators for BCHE/BCVE units.

Dimensions and Weights

Electric Heat

Shows diagrams of BCHE/BCVE blower coils with electric heat sections.

Dimensions and Weights

Electric Heat Section for BCHE/BCVE

Details the electric heat section for BCHE/BCVE units with dimension labels.

Dimensions and Weights

Electric heat section for BCVE size 24 to 36

Provides a diagram and dimensions for the BCVE electric heat section, sizes 24 to 36.

Dimensions and Weights

Coil Connections

Lists connection sizes in OD (inches) for BCHE and BCVE hydronic and DX coils.

Dimensions and Weights

Sample Piping Schematics

Provides piping schematics for 2-way valves with CV ratings of 2.3, 3.3, and 4.6.

Dimensions and Weights

Valve and Actuator Operation

Explains the operation of 2-way and 3-way valves, including stroke time and field-set flow capacity.

Installation Mechanical

Lifting and Rigging

Provides critical safety warnings and instructions for lifting and rigging the unit safely.

General Lifting Considerations

Offers guidance on estimating center of gravity and using proper rigging methods for safe unit lifting.

Installation Procedure

Outlines the general steps for installing the blower coil unit, focusing on horizontal units.

Installation Mechanical

Ceiling mounted horizontal unit

Details the procedure for installing horizontal units suspended from the ceiling using threaded rods.

Installation Mechanical

Vertical Unit (Model BCVE) Installation

Guides the installation of vertical BCVE units, including leg mounting and securing to the floor.

Installation Mechanical

Accessory Installation

Provides instructions and materials needed for installing various unit accessories like Mix Boxes and Attenuators.

Installation Mechanical

Mix box install

Details the process for installing the mix box accessory, including gasket and harness connections.

Installation Mechanical

Duct Connections

Specifies installation standards and recommendations for connecting ductwork to the unit.

Mix Box Damper Linkage

Provides steps for verifying the correct setup and tightening of mix box damper linkage components.

Installation Mechanical

Condensate Drain Connections

Guides on sizing and installing condensate drain lines and traps to prevent water damage.

Piping and Connections

General Recommendations

Offers general recommendations for proper installation, piping, and trapping to ensure satisfactory coil operation.

Grommet Installation

Explains the process of installing grommets for piping headers to prevent heat damage.

Piping and Connections

Drain Pan Trapping (Models BCHE/BCVE)

Details the proper trapping methods for BCHE/BCVE units, especially for negative pressure applications.

Piping and Connections

Water Coil Piping

Discusses water coil self-venting requirements based on size and row count.

Refrigerant Coil Piping

Refers to information on handling refrigerants and provides an example of split-system component arrangement.

Piping and Connections

Liquid Lines

Covers critical aspects of liquid line sizing, routing, and insulation for split-system applications.

Components

Lists necessary liquid-line refrigerant components and their proper sequence in the liquid line.

Piping and Connections

Suction Lines

Addresses proper line sizing, routing, and insulation for suction lines to ensure oil return and prevent condensation.

Piping and Connections

Expansion Valves

Explains the function of expansion valves in metering refrigerant and considerations for selection.

R-410A Refrigerant under Higher Pressure than R-22!

Warns about the higher pressures of R-410A refrigerant and the need for specific equipment.

Piping and Connections

Field-Installed Evaporator Piping

Provides guidance on pitching lines and selecting tube diameters for field-installed evaporator piping.

Installation - Controls

Control Options

Lists available control options, including CSTI, Thermostat, and Tracer® UC400-B.

Customer Supplied Terminal Interface (CSTI)

Describes the CSTI interface for use with field-supplied low-voltage thermostats or controllers.

CSTI Adapter Board Configuration

Provides CAUTIONary information on configuring the CSTI adapter board to prevent overheating.

Installation - Controls

Cooling

Explains how the CSTI changeover function provides cooling based on system configuration and sensor inputs.

Installation - Controls

Heating

Details how the CSTI changeover function provides heating based on system configuration and sensor inputs.

Thermostat

Electrical Shock Hazard!

Warns about electrical shock hazard during thermostat installation and replacement.

Installation - Controls

Tracer® UC400-B Controller

Describes the Tracer® UC400-B controller for single zone VAV control.

Communication Wire Specifications

Outlines specifications for BACnet MS/TP link wiring, complying with NEC and local codes.

General Wiring Guidelines

Provides guidelines for connecting wires to the UC400-B controller and expansion modules.

Setting the Address

Explains how to set rotary address dials for MAC Address and BACnet Device ID on the UC400-B controller.

Installation - Controls

MAC Address

Details the MAC Address requirements for the RS-485 communication protocol used by BACnet.

BACnet Device ID

Explains the BACnet Device ID requirement for network identification.

Installation - Controls

Power Supply

Advises reading warnings and notices before proceeding with the power supply section.

Installation - Controls

Hazardous Voltage!

Warns of hazardous voltage and the need to disconnect power before servicing.

Proper Ground Connection Required!

Emphasizes the requirement for a proper ground connection to prevent injury.

Wiring Requirements

Provides guidelines for installing the power supply circuit for proper UC400-B controller operation.

Installation - Controls

Power ON Check

Outlines steps to perform a power ON check for the UC400-B controller.

Air-Fi® Wireless Communications Interface (WCI)

Describes the WCI's role in enabling wireless communication, replacing wired links.

Wireless Zone Sensor (WZS) Set

Introduces the WZS set as an alternative to wired sensors for wireless communication.

Automatic Network Formation

Explains how WCIs connect to Tracer® SC and form networks automatically.

Installation - Controls

Wireless Zone Sensors

Discusses Trane wireless zone sensors and their communication capabilities.

Specifications

Lists environmental and operational specifications for wireless sensors.

Mounting

Provides details on mounting requirements and dimensions for wireless sensors.

Installation - Controls

Zone Sensor Options

Presents available wall-mounted zone sensors for design flexibility.

Zone Sensor Installation

Provides guidance on the proper installation of zone sensors.

Location Considerations

Advises on avoiding specific locations that can impair zone sensor performance or accuracy.

Installation - Controls

Location Considerations for Wireless Zone Sensors

Guides optimal placement of wireless sensors to maximize radio signal strength and reliability.

Height Requirements

Provides recommended mounting height requirements for zone sensors.

Mounting Surfaces

Details how to mount sensor back plates to various surfaces using provided hardware.

Wired Zone Sensor

Refers to wiring schematics for specific details on wired zone sensor connections.

Installation - Controls

Wireless Zone Sensors

Outlines the procedure for installing wireless zone sensors.

Receivers

Explains how receivers are shipped and how to remove them from the enclosure.

Zone Sensor Settings

Introduces the process of establishing communication between receivers and sensors, known as association.

Installation - Controls

Observing Receiver for Readiness

Describes the receiver's channel scan process after initial power-up to find the clearest channel.

Installation - Controls

Associating Sensor to Receiver

Details the steps required to associate a sensor with its receiver for communication.

Testing Signal Strength and Battery

Explains how to verify successful association and adequate battery charge using test buttons and LEDs.

Installation - Controls

Sensor Operations

Describes how to operate the sensor, including temporary occupancy and end-of-range values.

Receiver Power-up Sequence

Outlines the sequences that occur when power is applied to the receiver.

Installation - Controls

Wireless Sensor Specifications

Provides detailed specifications for wireless sensors, including operating temperature, accuracy, and range.

Installation - Controls

Wireless Display Sensor (WDS)

Covers the configuration procedure for wireless display sensors (WDS) to set system features.

Configuration Procedure

Provides step-by-step instructions for configuring the WDS sensor settings.

Installation - Controls

Displaying Setpoint or Temperature

Explains how to switch the WDS display between temperature and setpoint.

Locking or Unlocking Settings

Details how to lock or unlock setpoint, system, or fan settings to prevent unauthorized changes.

Installation - Controls

WDS Operating Mode

Describes how to operate the wireless display sensor (WDS) in its various modes.

Changing Room Temperature

Guides on how to adjust the room temperature using the WDS sensor's up and down arrows.

Installation - Controls

Changing Heating/Cooling Settings

Explains how to select heating and cooling temperature settings if the system supports it.

Changing Fan Settings

Details how to change fan settings, including speed and mode, using the WDS sensor.

Error Codes

Lists common error codes displayed by the thermostat and suggests when technical assistance is needed.

Testing Signal Strength

Explains how to test and interpret signal strength indicators on the WDS sensor and receiver.

Testing Battery Status

Guides on how to test and interpret battery status indicators for the WDS sensor.

Installation — Electrical

Unit Wiring Diagrams

Advises that specific wiring diagrams are provided inside each unit for reference and troubleshooting.

Supply Power Wiring

Provides critical WARNINGs regarding hazardous voltage and capacitors during power supply wiring.

Electrical Grounding Restrictions

Offers guidance to avoid ground loops when wiring sensors and input devices to the controller.

Interconnection Wiring

Explains the need for installer-provided wiring to connect wall-mounted devices like zone sensors.

Installation — Electrical

MCA and MOP Calculations

Details how to calculate Minimum Circuit Ampacity (MCA) and Maximum Overcurrent Protection (MOP) for units.

ECM Overview and Setup

Trane Electronically Commutated Motor (ECM)

Introduces Trane's ECM motors, highlighting their efficiency and advanced features.

VelociTach™ Motor Control Board

Describes the VelociTach motor control board's functions in coordinating motor performance and providing a user interface.

ECM Overview and Setup

Status Display

Explains the four-digit, seven-segment display on the motor control board for presenting information.

Installation and Initial Setup

Provides essential safety warnings and procedures for initial installation and setup.

ECM Overview and Setup

Safety Requirements

Lists safety recommendations for working with ECM motors and control boards.

Setup

Provides guidance on initial setup and wiring for ECM units.

VelociTach Motor Control Board

Provides critical safety alerts and operational warnings for the VelociTach Motor Control Board.

ECM Overview and Setup

User Interface

Describes the user interface of the VelociTach motor control board, supporting status display and parameter adjustments.

ECM Overview and Setup

Button actuation levels

Details the different actuation levels for the Menu/Set, Decrement, and Increment buttons.

ECM Overview and Setup

Configuration Examples

Provides step-by-step examples for viewing and changing motor control board parameters.

Priority/Error Display

Explains how the status display prioritizes and shows events or errors.

ECM Overview and Setup

Adjustments

Outlines necessary adjustments for motor control boards during commissioning.

Adjusting Variable Speed Inputs

Provides critical warnings for hazardous voltage and capacitors when adjusting VSP inputs.

ECM Overview and Setup

Safety Alert!

Alerts users to follow all instructions and precautions for safe operation.

Burn Hazard!

Warns of potential burn hazards due to overheating on electric heat units.

ECM Overview and Setup

VSP Setup Examples

Illustrates examples of setting up Variable Speed Potentiometer (VSP) inputs.

Potentiometer/Rheostat For VSP

Provides critical warnings for hazardous voltage and capacitors when working with VSPs.

ECM Overview and Setup

Adjusting Optional Auto-Changeover Function on CSTI Units

Guides on adjusting the auto-changeover function for CSTI units.

Hazardous Voltage w/Capacitors!

Warns about hazardous voltage and capacitors when adjusting auto-changeover functions.

ECM Overview and Setup

Motor Control Board Settings

Outlines motor control board functions and unit-specific settings found on the configuration label.

Safety Alert!

Alerts users to follow all instructions and precautions for safe operation.

Burn Hazard!

Warns of potential burn hazards due to overheating on electric heat units.

ECM Overview and Setup

Configuration settings of the motor control board (for reference only)

Lists parameter names and typical settings for the motor control board for reference.

ECM Overview and Setup

Fan Speed Response Verification

Details how to verify fan speed response by observing the motor control board display.

Start-Up

Pre-Startup Checklist

Provides a checklist to verify installation procedures are complete before unit startup.

Hazardous Voltage w/Capacitors!

Warns about hazardous voltage and capacitors, requiring power disconnection before servicing.

General Checklist

Covers essential checks for duct connections, leveling, dampers, filters, and electrical connections.

Ductwork Checks

Specifies requirements for ductwork installation, including flexible connectors and NFPA compliance.

Start-Up

Thermostat

Describes thermostat usage for two/four pipe systems, including auto fan and configuration.

Thermostat Operation

Explains how the thermostat operates the fan based on room temperature and setpoint.

Configuration Mode

Details the process for entering configuration mode to match the thermostat to the heating/cooling system.

Configuration Mode Settings

Lists and explains the various configuration settings for the thermostat.

Start-Up

Testing the Thermostat

Provides steps to test thermostat operation in heat, cool, and fan modes after configuration.

Tracer® UC400-B Controller

Introduces the Tracer® UC400-B controller for VAV control in standalone or BACnet systems.

Zone Sensor

Lists the zone sensor module inputs accepted by the controller.

Start-Up

Space Temperature Measurement

Explains that zone sensors use 10kΩ thermistors to measure space temperature.

External Setpoint Adjustment

Describes how external setpoint adjustments on zone sensors affect controller setpoints.

Fan Switch

Details how the zone sensor fan switch provides occupied fan request signals to the controller.

Start-Up

UC400-B Stand-Alone Operation

Guides on operating the UC400-B controller in a standalone configuration using default values.

UC400-B Operation

Describes the controller's basic functions and modes like Off, Auto, and Low/Med/High.

Sequence of Operation

Explains the power-up sequence of the UC400-B controller upon receiving 24 Vac power.

Start-Up

Occupancy Modes

Details the different occupancy modes (Occupied, Unoccupied, Standby, Bypass) controlled by the unit.

Occupied Mode

Describes how the controller maintains space temperature and operates the fan in Occupied Mode.

Unoccupied Mode

Explains how the controller maintains space temperature and cycles the fan in Unoccupied Mode.

Timed Override Control

Describes how ON/CANCEL buttons initiate or cancel timed overrides for occupancy.

Start-Up

Zone Temperature Control

Outlines three methods for zone temperature control: Cascade, Simplified, and Discharge Air Temperature Control.

Discharge Air Tempering

Explains the function to adjust discharge air temperature when cooling mode is active.

Heating or Cooling Mode

Details how the controller determines heating or cooling mode via communicated signals or automatic detection.

Start-Up

Fan Operation

Describes fan operation for 1-, 2-, 3-speed, and variable speed fans across different modes.

Manual Fan Speed Control

Explains how fans run continuously at the desired speed during occupied modes.

AUTO Fan Operation; 1-, 2-, 3-speed Fans

Details fan operation in AUTO mode for different fan types based on capacity.

AUTO Fan Operation; ECM Energy Efficient Mode

Explains how ECM fans minimize energy use by running at the lowest possible speed.

AUTO Fan Operation; ECM Acoustical Mode

Describes how ECM fans balance speed and noise for acoustical performance.

Start-Up

Exhaust Control

Explains how exhaust control is achieved via binary output and coordinated with the supply fan and dampers.

Valve Operation

Covers controller support for 3-wire modulating and 2-position valves for zone temperature control.

Three-Wire Modulating Valve Operation

Details how 3-wire modulating valves are controlled by binary outputs for open/closed functions.

Modulating Outdoor/Return Air Damper

Explains how the controller operates modulating outdoor/return air dampers based on various inputs.

Start-Up

Economizing (Free Cooling)

Describes economizing or free cooling, where outdoor air is used for cooling when temperatures are favorable.

Electric Heat Operation

Explains how the controller supports SCR and staged electric heat for maintaining space temperature.

Start-Up

Dehumidification Operation

Outlines conditions under which the controller supports space dehumidification.

Peer-to-Peer Communication

Describes peer-to-peer communication via TGP2 programming or hard wiring between controllers.

Unit Protection Strategies

Lists various strategies initiated to protect the unit or building from damage.

Smart Reset

Explains the smart reset function for automatically restarting units locked out by diagnostics.

Low Coil Temperature Protection

Refers to Tracer® UC400-B manual for information on low coil temperature protection.

Condensate Overflow

Refers to Tracer® UC400-B manual for information on condensate overflow.

Fan Status

Explains how fan status is reported and the diagnostics generated if the fan fails.

Fan Off Delay

Details the fan off delay, which keeps the fan energized for 30 seconds after heating is controlled OFF.

Filter Maintenance Timer

Describes the filter maintenance timer that tracks fan enabled hours for filter change reminders.

Freeze Avoidance

Explains the freeze avoidance mode used for low ambient temperature protection when the fan is OFF.

Freeze Protection (Discharge Air Temperature Low Limit)

Details freeze protection operation based on monitoring discharge air temperature.

Routine Maintenance

Hazardous Service Procedures!

Warns technicians to follow all safety precautions during routine maintenance.

Rotating Components!

Warns about the hazards of rotating components during servicing.

Maintenance Checklist

Provides a checklist for routine maintenance tasks based on frequency.

Air Filters

Gives instructions for installing and maintaining air filters, including using equivalent MERV-rated filters.

Routine Maintenance

Fans

Discusses inspection and cleaning of fan sections and fan motors for optimal performance.

Inspecting and Cleaning Fans

Details the process for inspecting and cleaning fan sections, including microbial growth removal.

Fan Motors

Advises periodic inspection of fan motors for vibration or temperature.

Torque Rating

Explains how to check and adjust fan wheel set screws when components are removed or adjusted.

Routine Maintenance

Coils

Emphasizes keeping all coils clean for maximum performance.

Water Coils

Provides critical safety warnings for servicing water coils.

Routine Maintenance

Refrigerant Coils

Provides instructions for cleaning refrigerant coils, including safety warnings.

Coil Winterization

Outlines water coil winterization procedures, primarily draining and using glycol.

Moisture Purge Cycle

Explains the moisture purge cycle to disperse humid air and prevent microbial growth.

Routine Maintenance

Cleaning Non-Porous Surfaces

Details how to clean non-porous surfaces like insulation or sheet metal to remove microbial growth.

Cleaning Porous Surfaces

Guides on cleaning porous insulating surfaces, such as fiberglass insulation, to remove dirt and organic matter.

Drain Pans

Provides safety warnings and cleaning instructions for condensate drain pans.

Diagnostics and Troubleshooting

Hazardous Service Procedures!

Emphasizes following all safety precautions during diagnostics and troubleshooting.

Diagnostics and Troubleshooting

Wireless Zone Sensors (WZS)

Introduces the receiver's LEDs and how they indicate diagnostic information for WZS.

Diagnostics and Troubleshooting

Receiver Diagnostics

Explains how receiver LEDs respond to diagnostics through specific blinking patterns.

Diagnostics and Troubleshooting

Diagnostics on the receiver

Details the LED states on the receiver and their corresponding indications for disassociation or configuration issues.

Sensor Diagnostics

Explains how WZS sensors respond to diagnostics via blinking patterns, visible by pressing the test button.

Testing Signal Strength

Guides on testing signal strength using sensor and receiver LEDs or WDS display symbols.

Diagnostics and Troubleshooting

Observing signal strength on the wireless zone sensor

Shows how to interpret signal strength indicators on the WDS sensor display.

Observing signal strength on the receiver

Explains how receiver LEDs indicate signal strength.

Testing Battery Status

Guides on testing battery status for WZS sensors via LED5 and for WDS sensors via display symbols.

Diagnostics and Troubleshooting

Check Signal Strength on a Site

Provides steps to check signal strength on-site using a receiver, sensor, and test button.

Replacing Sensor Batteries

Addresses sensor battery type, life, and installation requirements.

Battery Type

Specifies the type of batteries required and warns against recharging.

Battery Life

Provides information on battery life and how to conserve it when the sensor is not in use.

Diagnostics and Troubleshooting

Battery Installation

Guides on the correct procedure for installing sensor batteries, including polarity.

Risk of Injury with Batteries!

Warns of severe injury risks associated with improper battery handling.

Manual Association

Explains the manual association method for receivers and sensors when automatic association fails.

Disassociation

Lists conditions under which a receiver will disassociate from a sensor.

Replacing a Failed Sensor or Receiver

Provides steps for replacing a failed sensor or receiver, including setting addresses and applying power.

Diagnostics and Troubleshooting

Servicing and Testing Tools

Lists the simple tools and procedures needed to service and test the wireless sensor system.

Procedure for Testing Zone Sensor

Guides on troubleshooting steps if a wireless zone sensor is not working as expected.

Procedure for Testing Receiver

Provides steps to troubleshoot if a receiver is not working as expected.

Failure and Default Modes

Presents output values for failure and default modes to aid in troubleshooting.

Diagnostics and Troubleshooting

Measuring Output Resistance

Details how to measure the resistance of receiver outputs for zone temperature and setpoints.

Cleaning the Sensor

Provides instructions for cleaning the sensor without causing damage.

Thermostat

Provides troubleshooting steps for thermostat issues like no display or incorrect temperature.

Diagnostics and Troubleshooting

Tracer® UC400-B Controller

Details the LED activity on the Tracer® UC400-B controller for troubleshooting.

LED Activity

Explains the meaning of various LED states on the UC400-B controller for diagnosing operation and faults.

Diagnostics and Troubleshooting

Overriding Outputs

Explains how to safely override outputs like valves and dampers for testing and commissioning.

Diagnostics

Defines diagnostics as informational messages indicating controller operational status.

Diagnostics Types

Categorizes diagnostics based on clearing methods and information provided.

Manual (Latching) Diagnostics

Describes manual diagnostics that cause unit shutdown and require specific clearing methods.

Automatic (Non-latching) Diagnostics

Explains automatic diagnostics that clear when the problem is resolved.

Smart Reset Diagnostics

Details smart reset diagnostics that auto-recover after the condition is corrected.

Controller Diagnostics

Refers to a table listing diagnostics, their effects, and types.

Diagnostics and Troubleshooting

Diagnostics generated by UC400-B controller

Lists diagnostics generated by the UC400-B controller, their probable causes, consequences, and types.

Diagnostics and Troubleshooting

Fans with UC400-B Controller

Discusses fan operation issues with the UC400-B controller and potential causes.

Fan does not energize

Troubleshoots why the fan might not energize, covering wiring, end devices, and controller status.

Diagnostics and Troubleshooting

Valves with UC400-B Controller

Covers troubleshooting for valves not operating correctly with the UC400-B controller.

DX Coils or Electric Heat with UC400-B Controller

Addresses troubleshooting for DX coils or electric heat not energizing with the UC400-B controller.

Diagnostics and Troubleshooting

Outdoor Air Dampers with UC400-B Controller

Discusses troubleshooting for outdoor air damper operation with the UC400-B controller.

Diagnostics and Troubleshooting

ECM Motors

Provides critical warnings and general information for ECM motors and their control.

Troubleshooting Tips

Offers tips for troubleshooting ECM motors and VelociTach motor control boards.

Diagnostics and Troubleshooting

Motor

Discusses motor connections and ensuring proper seating for reliable operation.

Motor does not spin, spins too slowly

Provides probable causes and solutions for motors not spinning or spinning too slowly.

Diagnostics and Troubleshooting

Motor spins too fast or spins without any apparent speed request

Offers solutions for motors spinning too fast or without a speed request, potentially due to wiring or configuration.

Replacing ECM Components

Provides guidelines and warnings for replacing ECM motor components.

Diagnostics and Troubleshooting

Replacement Checklist

Lists items to check before and after replacing ECM components to prevent damage.

Circuit Module Replacement

Details the procedure for replacing circuit modules, including ESD precautions.

Diagnostics and Troubleshooting

Application Notes

Highlights notable differences of ECM motors compared to traditional designs.

RPM Mode

Explains the factory-programmed RPM mode for ECM motors and speed adjustments.

Field Power Wiring

Recommends good wiring practices for managing building electrical power system harmonics.

Performance Boundaries

Advises against programming fan speeds outside operating limits and discusses ESP impact.

Diagnostics and Troubleshooting

MCA/MOP and Power Draw

Discusses ECM motor variable output and how power draw is indicated.

Troubleshooting Other Unit Functions

Suggests checking wiring and configuration for unexplained abnormalities in unit functions.

Wiring Diagrams

Power

Lists wiring diagram numbers for power schematics.

Controls

Lists wiring diagram numbers for control schematics.

Zone Sensors and Dampers

Lists wiring diagram numbers for zone sensors and dampers.

Layout and Control Box Diagrams

Left-hand control box with motor, electric heat, condensate overflow, low-limit switch, discharge air temperature, and angle filter/ mixing box actuator

Illustrates the layout of the left-hand control box and its components.

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Table of Contents

Questions and Answers:

Trane BCHE Specifications

Summary

Safety Warnings

Introduction

Warnings, Cautions, and Notices

Proper Field Wiring and Grounding

Personal Protective Equipment (PPE)

Introduction

Follow EHS Policies

Model Number Description

General Information

Pre-Installation

Receiving and Handling

Jobsite Storage

Outdoor Storage

Pre-Installation

Site Preparation

Dimensions and Weights

Service Clearances

Dimensions and Weights

Horizontal Blower Coil

Dimensions and Weights

Vertical Blower Coil

Options

Angle Filter and Mixing Box

Options

Bottom/Top Access Filter Box

Options

Return and Discharge Attenuators

Dimensions and Weights

Electric Heat

Dimensions and Weights

Electric Heat Section for BCHE/BCVE

Dimensions and Weights

Electric heat section for BCVE size 24 to 36

Dimensions and Weights

Coil Connections

Dimensions and Weights

Sample Piping Schematics

Dimensions and Weights

Valve and Actuator Operation

Installation Mechanical

Lifting and Rigging

General Lifting Considerations

Installation Procedure

Installation Mechanical

Ceiling mounted horizontal unit

Installation Mechanical

Vertical Unit (Model BCVE) Installation

Installation Mechanical

Accessory Installation

Installation Mechanical

Mix box install

Installation Mechanical

Duct Connections

Mix Box Damper Linkage

Installation Mechanical

Condensate Drain Connections

Piping and Connections

General Recommendations

Grommet Installation

Piping and Connections

Drain Pan Trapping (Models BCHE/BCVE)

Piping and Connections

Water Coil Piping

Refrigerant Coil Piping

Piping and Connections

Liquid Lines

Components

Piping and Connections

Suction Lines

Piping and Connections

Expansion Valves

R-410A Refrigerant under Higher Pressure than R-22!

Piping and Connections

Field-Installed Evaporator Piping

Installation - Controls