TRANE RTAA Condenser Fan Control Retrofit Installation Guide

: June 15, 2024
: Trane

TRANE RTAA Condenser Fan Control Retrofit

Product Information

Specifications

Product Name: Condenser Fan Control Retrofit
Compatible Models: RTAA, RTCA
Service Offering Application: Yes
Publication Date: October 2023
Document Code: SO-SVN049A-EN

Installation Instructions

Safety Warning:
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.

Introduction
Read this manual thoroughly before operating or servicing this unit.

Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required. Your safety and the proper operation of this machine depend upon the strict observance of these precautions.

The three types of advisories are defined as follows:

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.
NOTICE: Indicates a situation that could result in equipment or property damage only accidents.

Important Environmental Concerns

Important Responsible Refrigerant Practices:

WARNING:
Proper Field Wiring and Grounding Required! Failure to follow the code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state/national electrical codes.

Personal Protective Equipment (PPE) Required!
Failure to wear proper PPE for the job being undertaken could result in death or serious injury. Technicians, to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below:

WARNING:
Follow EHS Policies! Failure to follow the instructions below could result in death or serious injury.

Copyright
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 to revise this publication at any time and to make changes to its content without obligation to notify any person of such revision or change.

Trademarks
All trademarks referenced in this document are the trademarks of their respective owners.

Revision History
Document updated to reflect Service Offering number.

Product Usage Instructions

General Information
Before proceeding with the installation or servicing of the Condenser Fan Control Retrofit, it is crucial to review the following instructions carefully.

Kit Selection and Contents
The Condenser Fan Control Retrofit kit is compatible with RTAA Air-Cooled Chillers and RTAC Air-Cooled Condensers. Please ensure that you have selected the appropriate kit for your specific model. The contents of the kit may vary depending on the model, but they typically include:

Condenser fan control module
Wiring harness
Mounting brackets
Screws and fasteners
Installation manual

Field-Provided Material
In addition to the contents of the kit, certain field-provided materials are required for the installation. These materials include:

Electrical wiring
Grounding equipment
Proper personal protective equipment (PPE)
Tools (screwdriver, wrench, etc.)

Installation Process
Follow these step-by-step instructions to install the Condenser Fan Control Retrofit:

Ensure that the power to the equipment is turned off.
Locate the existing condenser fan control module and disconnect all electrical connections.
Remove the old condenser fan control module from its mounting brackets.
Install the new condenser fan control module onto the mounting brackets included in the kit.
Connect the wiring harness from the new control module to the appropriate electrical connections on the chiller/condenser.
Secure all electrical connections with screws and fasteners.
Verify that all connections are properly tightened and secure.
Turn on the power to the equipment and test the operation of the condenser fan control.
Ensure that the fan control is functioning correctly and adjust any settings as necessary.

Maintenance and Servicing
Regular maintenance and servicing of the Condenser Fan Control Retrofit are essential to ensure optimal performance. Follow these guidelines:

Inspect the control module and wiring for any signs of damage or wear.
Clean the control module and surrounding area to remove dust and debris.
Check all electrical connections for tightness and corrosion.
Test the operation of the condenser fan control periodically to ensure proper functionality.
Refer to the manufacturer’s maintenance schedule for additional maintenance tasks and intervals.

Troubleshooting
If you encounter any issues with the Condenser Fan Control Retrofit, refer to the troubleshooting section of the installation manual or contact a qualified technician for assistance. Do not attempt to repair or modify the equipment without proper knowledge and training.

Frequently Asked Questions (FAQ)

Q: Who should install and service the equipment?
A: 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 require specific knowledge and training.
Q: What personal protective equipment (PPE) is required?
A: Technicians must wear proper PPE for the job being undertaken to protect themselves from potential electrical, mechanical, and chemical hazards. Refer to the instructions in the manual and on the tags, stickers, and labels.
Q: What should I do if I encounter any issues with the equipment?
A: If you encounter any issues with the equipment, refer to the troubleshooting section of the installation manual or contact a qualified technician for assistance. Do not attempt to repair or modify the equipment without proper knowledge and training.

Model Numbers: RTAA, RTCA

This document applies to service offering applications only.

SAFETY WARNING
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 require 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.

Introduction

Read this manual thoroughly before operating or servicing this unit.

Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required. Your safety and the proper operation of this machine depend upon the strict observance of these precautions.

The three types of advisories are defined as follows:

WARNING
Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.
NOTICE
Indicates a situation that could result in equipment or property damage only accidents.

Important Environmental Concerns
Scientific research has shown that certain man-made chemicals can affect the earth’s naturally occurring stratospheric ozone layer when released into the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain 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
Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified according to local rules. For the USA, the Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering, and recycling certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for the responsible management of refrigerants. Know the applicable laws and follow them.

WARNING

Proper Field Wiring and Grounding Required!
Failure to follow the code could result in death or serious injury. All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/state/national electrical codes.

WARNING

Personal Protective Equipment (PPE) Required!
Failure to wear proper PPE for the job being undertaken could result in death or serious injury. Technicians, to protect themselves from potential electrical, mechanical, and chemical hazards, MUST follow precautions in this manual and on the tags, stickers, and labels, as well as the instructions below:

Before installing/servicing this unit, technicians MUST put on all PPE required for the work being undertaken (Examples; cut-resistant gloves/sleeves, butyl gloves, safety glasses, hard hat/bump cap, fall protection, electrical PPE, and arc flash clothing). ALWAYS refer to appropriate Safety Data Sheets (SDS) and OSHA guidelines for proper PPE.
When working with or around hazardous chemicals, ALWAYS refer to the appropriate SDS and OSHA/GHS (Global Harmonized System of Classification and Labeling of Chemicals) guidelines for information on allowable personal exposure levels, proper respiratory protection, and handling instructions.
If there is a risk of energized electrical contact, arc, or flash, technicians MUST put on all PPE by OSHA, NFPA 70E, or other country-specific requirements for arc flash protection, before servicing the unit. NEVER PERFORM ANY SWITCHING, DISCONNECTING, OR VOLTAGE TESTING WITHOUT PROPER ELECTRICAL PPE AND ARC FLASH CLOTHING. ENSURE ELECTRICAL METERS AND EQUIPMENT ARE PROPERLY RATED FOR THE INTENDED VOLTAGE.

WARNING

Follow EHS Policies!
Failure to follow the instructions below could result in death or serious injury.

All Trane personnel must follow the company’s Environmental, Health, and Safety (EHS) policies when performing work such as hot work, electrical, fall protection, lockout/tagout, refrigerant handling, etc. Where local regulations are more stringent than these policies, those regulations supersede these policies.
Non-rane personnel should always follow local regulations.

Copyright
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 to revise this publication at any time, and to make changes to its content without obligation to notify any person of such revision or change.

Trademarks
All trademarks referenced in this document are the trademarks of their respective owners.

Revision History
Document updated to reflect Service Offering number.

General Information

Read this manual thoroughly before operating or servicing this unit. The purpose of this bulletin is to advise customers of the parts and procedures required to replace the variable speed drive originally used to control condenser fans in RTAA and RTCA units. These parts were present on 70 to 125 ton, RTAA chillers and RTCA condensers when ordered with the low ambient operation option. The original drive will be phased out, and the parts mentioned below will be the most up-to-date and cost-effective substitutes.

Notes:

This upgrade has been designed for units in good working order. It is assumed that the unit is charged with the correct amount of refrigerant and oil. Review all coils, fan blades, starters, and controls to determine if any other service procedures are required during equipment downtime.
RTCA condensers are most commonly paired with RTUA chillers. These instructions have been written for this configuration.

Kit Selection and Contents

Obtain the required parts from the local Trane Parts Center. If the specific part number cannot be determined, contact the local Trane Parts Center with the unit model number or serial number. Two kits are available. Select the correct drive replacement kit based on the existing unit voltage per Table 1 below. In addition to the correct drive replacement kit, some additional field-provided material will be required. See “Field-Provided Material,” for a suggested list of materials.

Table 1. Kit selection

Unit Voltage	Kit Part Number	Kit Description

200/60/3

230/60/3

| ****

CNT07653

| RTAA Fan Drive Retrofit 230V
380/60/3| |
400/50/3

460/60/3

| ****

CNT07652

| RTAA Fan Drive Retrofit 460V
575/60/3| |

Each kit consists of an assembly and several loose parts. The assembly includes a variable speed drive and associated components mounted to a back plate. See Figure 1, for physical dimensions and configuration. See Table 2, for a list of service parts. See Table 3, for a list of parts shipped loose.

Figure 1. Drive assembly

Table 2. Service parts

		Service Part Number
		CNT07653
		RTAA Fan Drive Retrofit
Device Designator	Part Description	230V
1U28	Variable Speed Drive	DRV03113
1F1
1F2	Drive Fusing	FUS01010 (30-A Fuse)
1F3

Table 3. Loose shipped parts

Reference	Part Number	Description	Qty	UOM
1	570922770100 (PNL20506)	Plate; Inverter Cover, (16 ga)	1	EA
2	X13500224070	Rail; DIN Terminal Block, 35 mm, 4.00 lg	1	EA
3	X13490948010	Terminal Block; 2P 20A 600V	4	EA
4	X13490948140	Pole Marking 1-10 Vert	1	EA
5	X13490948070	End Stop	2	EA
6	X13490948040	2P End Plate	1	EA
7	X45091639010	Cap; DIN Rail End	2	EA
8	SO-SVN049*-EN	Installation Instructions (16 pages, 8.5 x 11-in.)	1	EA

9

| 507118990001 (CNT07684)| AVNET Integrated Circuit 6400039050 – EPROM, UV 32KX8, CMOS 250 NS Vpp =12.5V

-40 to 85C 28 DIP 27C256

Software – 6200005021

| ****

1

| ****

EA

10| X22010076080| Lock – 1/4, External Toothed| 4| EA
11| X25020623250| Screw; M6x01 x 16, PH Thd Roll| 4| EA
12| X22050228060| Washer; 0.265-in. ID x 0.500-in. OD, PL| 4| EA
13| 507119000001| Schematics; RTAA Fan Control Retrofit| 1| EA

Tools Required

Common hand tools and hand-held power tools are required to perform the retrofit. A trained service technician with a well-stocked tool chest should have all of the necessary tools to perform the job. The following list is a sampling of the tools that one could expect to find inside the technician’s tool chest:

Electric drill and bit set
Screwdrivers
Wrenches
Ratchet and socket set
Nut driver set
Wire cutter
Wire stripper

The following special tools are also required to perform the retrofit:

If possible, an EPROM extractor should be used to remove the existing EPROM. The suggested EPROM extractor is Digikey K158-ND. If an EPROM extractor is not available a small flat-blade screwdriver may be used.

Field-Provided Material

Some field-provided material will be required to perform the RTAA/RTCA fan controls retrofit. A partial list of materials is provided here to help the technician plan ahead and to avoid material shortages at the job site.

Wire, #16 AWG – A control wire will be required to make the connections between components.
Wire markers will be required to identify field wiring.
Wire nuts and splicers may be required if splicing wires in the control panel.
Cable ties help to clean up wiring runs.
Assorted fasteners for component mounting and/or relocation.
Trane has determined that inverter duty motors provide a much more robust system when combined with variable-speed drives. As with the previous drive, the fan motor should also be replaced with an inverter-duty-rated motor if it is not already an inverter-duty-rated motor. The service part numbers for RTAA/RTCA inverter duty motors are found in the table below. For additional help, contact the local Trane Parts Center with the unit model number or serial number.
The fan drive retrofit kits have been sized to fit in the main RTAA control enclosure. Some existing components may need to be relocated. The standard RTCA control enclosure is not large enough for the drive retrofit kits. A separate enclosure is required for RTCA. PNL34974 is recommended. PNL34974 may optionally be used with RTAA if additional cabinet space is desired.
When using a separate enclosure, such as PNL34974, additional mounting hardware may be required depending on the selected mounting location. Additional conduit, fittings, and wire will also be required.
Previous applications of TR170 drives, including earlier versions of this kit, included a blanket heater and temperature control to protect the drives from low temperatures. This heater and control is no longer required and has been removed from this kit. These service parts, HTR16716 and CNT06627, may be purchased separately if desired.

Table 4. RTAA/RTCA fan motor part numbers

RTAA Design Sequence| RTCA Design Sequence|

Motor Voltage

|

Motor Frequency

|

Standard Duty Motor

|

Inverter Duty Motor

---|---|---|---|---|---
A0 – L0| A0-E0| 200-460/400| 60/50| MOT06367| MOT14610

M0 – R0

|

F0-G0

| 200-230| 60| MOT09903| MOT14016
460/380-415| 60/50| MOT09903| MOT14017

T0 and Later

|

H0 and Later

| 200-230| 60| MOT12634| MOT14014
460/380-415| 60/50| MOT12636| MOT14015

Pre-Installation

WARNING

PPE for Arc/Flash Required!
Failure to wear appropriate PPE could result in death or serious injury. On this unit, if the handle shield is cracked the circuit breaker could arc/flash when reset. To avoid being injured, technicians MUST put on all necessary Personal Protective Equipment (PPE), by NFPA70E for arc/flash protection, before entering the starter panel cabinet.

This retrofit consists of replacing and installing components and wiring in the control panel and an electrical enclosure under the condenser coil. See Figure 2 and Figure 3, for examples of original drive mounting.

WARNING

Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy- storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for the discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.

Turn off power to the machine, water pumps, and any field-provided control power. For RTCA units, also remove the power from the associate chiller (RTUA).
Secure all disconnect switches following lockout/tagout safety procedures.
Open the control panel doors and verify all power has been removed.
Remove any louvers or wire panels that may prevent access to the existing variable speed drives.
Verify the condenser fan motor is inverter duty-rated. If it is not, replace the motor. See “Field-Provided Material,” for motor identification.
Record the following information from the condenser fan motor nameplate. This information will be needed during drive configuration.
- Motor Power
- Motor Voltage
- Motor Frequency
- Motor Current
- Motor Nominal Speed
If using a new additional enclosure, such as PNL34974, for drive mounting, select a convenient location and mount. Avoid mounting the enclosure under the condenser coil or in any location that would prevent access to other serviceable components.

Control Panel Modifications

WARNING

Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy- storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for the discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.

Removal of Existing Controls

Locate the original drive enclosure underneath the condenser coil. See Figure 2.
Remove the drive enclosure cover.
Remove the variable speed drive being replaced.
Speed and fault signal wiring may be pulled back into the control panel.
Locate the cover plate (PNL20506) in the loose parts of the kit.
Install the cover plate over the opening left by the drive.
Locate the DIN rail, DIN rail caps, terminal blocks, end plate, terminal labels, and end stops in the loose parts of the kit.
Mount the DIN rail and caps in a convenient location in the existing drive enclosure.
Mount the terminal blocks, end plate, terminal labels, and end stops onto the DIN rail. This terminal block may be labeled 2TB1.
The new drive in the control panel will require a direct ground connection from the motor to the drive. Run a new ground wire from the drive enclosure back to the control panel.
Connect the motor wires to the wires running back to the control panel. These wires are color-coded. See Table 5 for connections.
Table 5. Drive enclosure connections** Connection| Color| Description**
---|---|---
2TB1-1| Red| L1
2TB1-2| Blue| L2
2TB1-3| Black| L3
2TB1-4| Green| GND
See Figure 5 for an example of the drive enclosure with one drive removed.
Replace the enclosure cover.

New Drive Installation

Locate a convenient location in the control panel for installation. This may be a new enclosure such as PNL34974. The front of the drive will need to be accessible for entering drive parameters. The top and bottom of the drive require 4 inches of clear space for ventilation. The drive assembly must be mounted directly to the back of the enclosure to allow the door to close.
Some existing components may need to be relocated. For example, 575-V units have an autotransformer that may be moved to under the panel mullion.
This kit is for a single-drive replacement, however, the other drive may need to be replaced in the future. Leave enough space for another drive to be installed in the future.
Place the drive assembly in the desired location and mark locations for the drive assembly mounting holes on the back of the enclosure. Remove the assembly.
The following hardware is provided for mounting the drive assembly. Drill a 3/16-inch pilot hole at each marked location. Lift the assembly back into place and mount using the included hardware.
Part Number| Description| Qty| UOM
---|---|---|---
X22010076080| Lock – 1/4, External Toothed| 4| EA
X25020623250| Screw; M6x01 x 16, PH Thd Roll| 4| EA
X22050228060| Washer; 0.265 ID x 0.500 OD, PL| 4| EA

Note: Field-provided hardware can be substituted, however, thread-rolling fasteners or sealing washers are required to prevent moisture from entering the control panel.

See Figure 6 for an example of a mounted drive assembly inside an RTAA control panel.

EPROM Installation

NOTICE

Static Sensitive Components!

Static charges on the human body can regularly reach voltages of more than 12,000 volts.
You MUST follow the instructions below to reduce the risk of damage to the electronics. Before handling the module, discharge yourself by touching the panel sheet metal or use an anti-static wrist strap.

For RTAA units, the following control work should be completed in the unit control panel. For RTCA units, the EPROM work needs to be completed in the RTUA control panel.

Record the software part number and extension found on the EPROM provided in the upgrade kit, before installing into the module. These numbers will be used later to verify the correct EPROM was installed.
Disconnect power from the compressor module.
Before handling the compressor module, discharge yourself by touching the panel sheet metal or using an anti-static wrist strap.
Important: See Figure 4, for module locations. Compressor modules 1U4 and 1U5 are located BEHIND other modules.
Remove 1U4 (compressor A) and 1U5 (compressor B) modules from the panel. The modules have key holes so the mounting screws need only be loosened but not removed. Note where the various wires are plugged into the module connectors. The plugs may be labeled to avoid confusion when reconnecting. If the module is beneath another, the connectors on just one side of the upper module may be removed and the module hinged out to access the lower module.
Place the module on a conductive bench, i.e. metal surface. While working, you and the module must be in contact with the bench to prevent you or the module from developing a damaging static discharge.
Remove the fish paper insulator.
Remove the screws securing the PCB assembly to the sheet metal cover. The screws are located under the fish paper. Touch the screwdriver to the metal bench before use to avoid a damaging static discharge to the module.
There are eight #6-32 screws located under the compressor module. Remove all eight.
The EPROM is the chip that is installed in the socket. It is designated as U2 on the compressor module. This is shown below in Figure 7.
Note the orientation of EPROM before removing it. The notch in the EPROM should line up with the notch in the socket and the notch drawn in the outline on the PCB.
Touch the screwdriver used to remove the EPROM to the metal bench before use to avoid a damaging static discharge to the module. The screwdriver must be a small blade type with a 1/8 to 3/16-inch blade.
Remove the EPROM by inserting a small blade-type screwdriver between the EPROM and the socket. Keep the blade near either row of pins of the EPROM since the socket has no bottom in its center. The screwdriver could damage the PCB if it enters this center region. Avoid contacting the screwdriver to other components. Pry the EPROM up, trying not to bend any pins. Work the screwdriver further under the EPROM keeping the blade snug to the row of pins.
Lift the EPROM from its socket.
Install the new EPROM. Align the notch in the EPROM to the notch in the socket and on the PCB as the original EPROM was. Make sure that the PCB assembly is lying flat on the bench surface when pressing down on the EPROM. Press the EPROM firmly into place.
Inspect the EPROM and the socket to make sure that all pins are lined up and inserted correctly. Verify that there are no bent pins.
Install the sheet metal cover and fish paper. Torque screws 8 in-lbs minimum and 11 in-lbs maximum.
Install the module.
Verify that all of the connections are correct and that the mounting screws are tight.
The EPROM includes a sticky label that indicates the replacement of the EPROM. Apply the label to the outside of the compressor module. This will alert a technician that a replacement EPROM will need to be ordered in the event of module replacement.

Wiring

WARNING

Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy- storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for the discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.

Power wiring, motor wiring, and drive signal wiring all must be relocated from the fan contactor and drive fuses to the new drive assembly. Table 6 indicates the wiring connections that must be made. Remove any existing wiring from terminals being reused.

Note:

Wire numbering may vary from unit to unit. Wire identification numbers are provided for reference only and must be verified in the field. Refer to the included kit schematics for a more detailed description of kit wiring.
Replacement drives utilize a dry contact as an ENABLE signal. Connecting any external voltage source to drive terminals 12 or 18 will result in damage to the drives. When using a contactor to enable a drive, remove all existing wires connected to the line and load terminal before connecting these terminals to the drive. Use an individual pole as the ENABLE signal.

Table 6. Wiring connections

__

Replacing Circuit 1 Drive

| __

Replacing Circuit 2 Drive

| To Drive Assembly Connection
---|---|---
Wire Identification| From Existing Unit Connection| Wire Identification| From Existing Unit Connection|
20A, 44B, or 47A(a)| 1F1 or 1T10-X1(a)| 23A, 50B, or 53A(a)| 1F4 or 1T11-X1(a)| 1F1
21A, 45B, or 48A(a)| 1F2 or 1T10-X2(a)| 24A, 51B, or 54A(a)| 1F5 or 1T11-X2(a)| 1F2
22A, 46B, or 49A(a)| 1F3 or 1T10-X3(a)| 25A, 52B, or 55A(a)| 1F6 or 1T11-X3(a)| 1F3
Red| 2TB1-1 (3B2[RED])| Red| 2TB1-1 (4B2[RED])| 1U28-96 (U)
Blue| 2TB1-2 (3B2[BLU])| Blue| 2TB1-2 (4B2[BLU])| 1U28-97 (V)
Black| 2TB1-3 (3B2[BLK])| Black| 2TB1-3 (4B2[BLK])| 1U28-98 (W)
Field Provided| 2TB1-4

(Motor Ground)

| Field Provided| 2TB1-4

(Motor Ground)

(a) 575V units only.

General Start-Up Review

When all components have been mounted and wired, close all electrical enclosures.
Restore machine power.
Place the unit in STOP to prevent unintended operation.
WARNING
PPE for Arc/Flash Required!
Failure to wear appropriate PPE could result in death or serious injury. On this unit, if the handle shield is cracked the circuit breaker could arc/flash when reset. To avoid being injured, technicians MUST put on all necessary Personal Protective Equipment (PPE), by NFPA70E for arc/flash protection, before entering the starter panel cabinet.
Open the cover or door over the drive and verify the drive has powered up.
Note: The drive cooling fan may be operating, even if the unit is in standby mode.
Proceed to enter drive parameters.

Entering Drive Parameters

Drives are shipped with generic settings. These settings must be updated to reflect the drive application. Table 7 lists the drive parameters that must be changed for correct operation.

Notes:

Pressing the MENU button once will enter the drive parameter wizard. The parameter wizard does not access all the required parameters.
To access ALL parameters, press the MENU button twice.
The parameters are set by different levels. Click OK to access Level 1 and Level 2.
The default setting for Parameter 5-12 will cause a drive error. Parameters 5-12 MUST be set to (0) No Operation.

Table 7. Drive parameters

Level 1	Level 2	Level 3	Description	Settings

__

0 – **

__

1-**

| __

__

1-2

| 1-20| Motor Power| —HP(b)
1-22| Motor Voltage| —V(b)
1-23| Motor Frequency| –Hz(b)
1-24| Motor Current| –A(b)
1-25| Motor Nominal speed| –rpm(b)
__

1-7

| 1-71| Start Delay| 3 s(b)
1-72| Start function| (0) DC Hold
1-73| Flying start| (1) Enable
1-8| 1-82| Min speed| 0.1 Hz
1-9| 1-90| Motor Thermal Protection| (4) ETR Trip 1
2 – **| 2-1| 2-10| Brake Function| (0) Brake Function Off
__

3 – **

| 3-0| 3-02| Minimum Reference| 0
3-03| Maximum Reference| 50/60(c)
3-4| 3-41| Ramp 1 Ramp Up time| 5 s
3-42| Ramp 1 ramp Down Time| 20 s
__

4 – **

| __

4-1

| 4-10| Motor Speed Direction| (0) Clockwise
4-12| Motor Speed Low Limit| 3 Hz
4-14| Motor Speed High Limit| 50/60 Hz(c)
4-18| Current Limit| 140%
5 – **| 5-1| 5-12(d)| Terminal 27 Digital Input| (0) No Operation
5-4| 5-40| Function Relay| (0) Alarm (9)
__

6 –**

| __

6-1

| 6-10| Terminal 53 Low Voltage| 0 V
6-14| Terminal 53 Low Ref/Feeb Value| 0
6-15| Terminal 53 High Ref/Feeb. Value| 50/60(c)
__

__

14 – **

| 14-0| 14-01| Switching Frequency| 5 KHz
14 – 1| 14-12| Function at mains Imbalance| (3) De-Rate
14-2| 14-20| Reset Mode| (10) Auto Reset x 10
14-21| Automatic Restart Time| 30 s
14-5| 14-50| RFI Filter| (0)

Parameters 0-40 may be enabled for drive/rotation troubleshooting.
Parameters are from the motor nameplate.
Use when the frequency is either 50 or 60 Hz.
The default setting for parameters 5-12 will cause a drive error. Parameters 5-12 must be set to (0) No Operation.

Optional Drive Parameter Copy Procedure

If the chiller has multiple drives, the following procedure can be used to copy parameter settings from one drive to another.

Note: Step 2 can also be used to backup drive parameter settings.

Program first drive (#1) per Table 7.
On the programmed drive, upload data to the local control panel (LCP #1) as follows:
- Go to 0-50 LCP copy.
- Press [OK].
- Select All to LCP.
- Press [OK]. A progress bar shows the uploading process.
- Press [Hand on] to return to normal operation.
Remove LCP #1 from the programmed drive (#1).
Replace LCP on the drive to be programmed (#2), with LCP #1, removed from drive #1.
Download data onto drive #2 as follows:
- Go to 0-50 LCP copy.
- Press [OK].
- Select All from LCP.
- Press [OK]. A progress bar shows the downloading process.
- Press [Hand on] to return to normal operation.
Remove LCP #1 and reinstall LCP #2 on drive #2.
Repeat Step 4 through Step 6 for any additional drives to be programmed.
Reinstall LCP #1 on drive #1.

Verify Fan Function

WARNING

Rotating Components!
Failure to disconnect power before servicing could result in rotating components cutting and slashing technician which could result in death or serious injury. During installation, testing, servicing, and troubleshooting of this product it may be necessary to work with live and exposed rotating components. Have a qualified or licensed service individual who has been properly trained in handling exposed rotating components, perform these tasks.

Place the drive in HAND mode.
Note: Parameter 40 will need to be enabled.
Turn the fan to low speed.
Observe the fan’s rotational direction.
- If the fan rotates in the wrong direction, turn off power to the machine, water pumps, and any field-provided control power.
- Secure all disconnect switches following lockout/tagout safety procedures.
  WARNING
  Hazardous Voltage w/Capacitors!
  Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury. Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy- storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for the discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.
- Open the control panel doors and verify all power has been removed.
- Switch the blue and black wire at the drive terminals.
- Restore unit power.
- Return to Step 1.
Increase speed and verify the fan operates over the full speed range.
Return drive to AUTO mode.
Note: Change parameter 40 to Disable.
Close the control panel.
Return the machine to standard operating condition.

Trane – by Trane Technologies (NYSE: TT), a global climate innovator – creates comfortable, energy-efficient indoor environments for commercial and residential applications. 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.