Trane Condenser Fan Control Retrofit
Installation Instructions
RTAC Air-Cooled Chillers
Kits CNT07650 and CNT07651
Model Number: RTAC
This document applies to service offering application only.
⚠️ 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.
October 2023
Document Number: SO-SVN051A-EN
Introduction
Read this manual thoroughly before operating or servicing this unit.
Warnings, Cautions, and Notices
Safety advisories appear throughout this manual as required. Your personal 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 to 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 of 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 responsible management of refrigerants. Know the applicable laws and follow them.
⚠️ WARNING
Proper Field Wiring and Grounding Required!
Failure to follow 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, in order 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 in accordance with OSHA, NFPA 70E, or other country-specific requirements for arc flash protection, PRIOR to 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 INTENDED VOLTAGE.
⚠️ WARNING
Follow EHS Policies!
Failure to follow 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-Trane 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 document is to advise customers of the parts and procedures required to replace the variable speed drive originally used to control condenser fans in RTAC units built prior to end of 2011 (design sequence A0 - V0). These parts were present on RTAC chillers when ordered with the low and wide ambient operation options. The retrofit closely matches the most current design sequence for RTAC chillers. 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 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.
- For units with 3 or 4 compressors, the retrofit can be done on a single circuit. Both circuits do not have to be changed unless needed.
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. 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 | CNT07651 | RTAC Fan Drive Retrofit 230V |
| 380/60/3 400/50/3 460/60/3 575/60/3 | CNT07650 | RTAC Fan Drive Retrofit 460V |
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 3 for a list of service parts. See Table 4 for a list of parts shipped loose.
Device Designator Information
The device designators for the kits will differ from the device designators of the existing unit controls. Also, the same device designators will be used differently depending on application. This is true for the drives and all other supporting components. Refer to the table below for examples of original device designators and replacement device designators. A complete list of device designators and how they connect to existing equipment can be found in the schematics (507118960001) included in the kit.
Table 2. Device designator
| Application Description | VFD Device Designator | |
| Original | Replacement | |
| 2-compressor RTAC | 3U3 | 1U28 |
| 3 and 4-compressor RTAC Circuit 1 | 4U3 | 2U28 |
| 3 and 4-compressor RTAC Circuit 2 | 3U3 | 1U28 |
| 3U4 | 2U28 | |
| 4U3 | 1U28 | |
| 4U4 | 2U28 | |
Figure 1. Drive assembly
Dimensions: 23.0 inches (width) x 22.0 inches (height)
Table 3. Service parts
| Device Designator | Part Description | Service Part Number | |
| CNT07651 RTAC Fan Drive Retrofit 230V | CNT07650 RTAC Fan Drive Retrofit 460V | ||
| 1U28 | Variable Speed Drive - Circuit 1 | DRV03113 | DRV03114 |
| 2U28 | Variable Speed Drive - Circuit 2 | DRV03113 | DRV03114 |
| 1F1-6, 1F7-12 | Condenser Fan Fuses | FUS01010 (30-A CC Fuse) 200, 230 V | FUS01010 (30-A CC Fuse) 380, 400, 460, 575 V |
| 1F13-14 | Control Power Transformer Primary Fuses | FUS01386 (10-A CC Fuse) – 200 V FUS01752 (8-A CC Fuse) – 230 V(a) | FUS02275 (5-A CC Fuse) – 380, 400, 460 V(a) FUS02272 (4-A CC Fuse) – 575 V |
| 1F15 | Control Power Transformer Secondary Fuse, 115-V Circuit | FUS01386 (10-A CC Fuse) 200, 230 V | FUS01386 (10-A CC Fuse) 380, 400, 460, 575 V |
| 1F16 | Control Power Transformer Secondary Fuse, Low Voltage Circuit | FUS02275 (5-A CC Fuse) 200, 230 V | FUS02275 (5-A CC Fuse) 380, 400, 460, 575 V |
| 1F18-23 | Inverter Drive Fuses | FUS01010 (30-A CC Fuse) 200, 230 V | FUS01010 (30-A CC Fuse) – 380, 400, 460 V(a) FUS02279 (6-A CC Fuse) – 575 V |
| 1K10-1K12, 1K14-1K16 | Condenser Fan Contactors | CTR02006 | CTR02708 |
(a) As-shipped configuration.
Table 4. Loose shipped parts
| Reference | Part Number | Description | Qty | UOM |
| 1 | BRD04873 | Module; Dual Binary Input, UCP3 | 1 | EA |
| 2 | BRD04875 | Module; Analog I/O, Dual, CH530, Vertical Headers | 1 | EA |
| 3 | SO-SVN051*-EN | Installation Instructions (20 Pages 8.5-in. x 11-in.) | 1 | EA |
| 4 | 570922770100 | Plate; Inverter Cover, (16 GA) -RTAC | 2 | EA |
| 5 | X13500224070 | Rail; Din Terminal Block, 35 mm, 4.00 LG | 1 | EA |
| 6 | X13490948010 | Terminal Block; 2P 20A 600 Volt | 8 | EA |
| 7 | X13490948140 | Pole Marking 1-10 Vert | 1 | EA |
| 8 | X13490948070 | End Stop | 2 | EA |
| 9 | X13490948040 | 2P End Plate | 2 | EA |
| 10 | X13110674140(a) | Fuse; Class CC, FNQ-R, Type, 10 Amp, 600 Volt | 2 | EA |
| 11 | X45091639010 | Cap; Din Rail End | 2 | EA |
| 12 | 507118960001 Rev C or most current | Schematics; RTAC Fan Control Retrofit | 1 | EA |
| 13 | X13110674100(b) | Fuse; Class CC, FNQ-R, Type, 4 Amp, 600 Volt | 2 | EA |
| 14 | X13110674120(b) | Fuse; Class CC, FNQ-R, Type, 6 Amp, 600 Volt | 6 | EA |
| 15 | 531400880100(b) | Guard; 575V Auto Transformer | 2 | EA |
| 16 | X25020740010(b) | Screw; Hex Head M4X10 | 4 | EA |
(a) CNT07651 only. (b) CNT07650 only.
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:
- Computer having the latest version of TechView™ service software.
- Cable to connect DynaView™ to a PC. Use a factory approved and tested USB-to-serial cable (Trane part number ADP01161). The Rover Adapter service tool provides the most reliable connection.
- RS-232 male DB9 to female DB9 pin to pin serial cable. Note: Cable must not be a null-modem cable. Cable must be less than 50 feet in length.
- Magnetic screwdriver (South-pole magnet TOL01341).
- Crimping tool for barrel-crimped wire terminals.
- Rotary tool with cutting wheel.
Field-Provided Material
Some field provided material will be required to perform the RTAC fan controls retrofit. A partial list of material is provided here to help the technician plan ahead and to avoid material shortages at the job site.
- Wire, #16 AWG – 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.
- The 575V units require the reuse of the existing autotransformers (1T10 and 1T11 or 2T10 and 2T11). If the autotransformers are damaged or missing, order replacements. The service part number is TRR00957.
- Trane has determined that inverter duty motors provide a much more robust system when combined with variable speed drives. The fan motor should be replaced with an inverter duty rated motor if it is not already an inverter duty rated motor. The service part number for RTAC inverter duty motors are provided in the table below. For additional help, contact the local Trane Parts Center with the unit model number or serial number.
- 4-compressor units and circuit 1 of 3-compressor units use a single LLID relay to enable both drives on a circuit. Previous RTAC designs used an upstream contactor or paralleled enable signals to start the drives. Neither of these configurations are applicable to the TR170 drives. An additional relay with the following minimum specifications is required: 2 pole, normally open, 24-VDC contacts, and 120-VAC coil. One of the fan contactors being replaced may be used, or relay RLY00636 and socket BAS00153 is recommended.
- 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 5. Inverter duty motor part numbers
| Design Sequence | Motor Voltage | Motor Frequency | Open Dripproof Motor | Totally Enclosed Motor | ||
| Standard Duty Motor | Inverter Duty Motor | Standard Duty Motor | Inverter Duty Motor | |||
| A0 through N0 | 200-230 | 60 | MOT10293 | MOT14336 WIR04330(a) | MOT10485 | MOT14012 WIR04330(a) |
| 460/380-415 | 60/50 | MOT10294 | MOT14337 WIR04330(a) | MOT10483 | MOT14013 WIR04330(a) | |
| P0 and V0 | 200-230 | 60 | n/a | n/a | MOT12626 | MOT14009 |
| 380 | 60 | n/a | n/a | MOT12627 | MOT14010 | |
| 460/380-415 | 60/50 | n/a | n/a | MOT12628 | MOT14011 | |
(a) Wire adapter WIR04330 only required on the first change out.
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), in accordance with NFPA70E for arc/flash protection, PRIOR to entering the starter panel cabinet.
Figure 2. Original drive enclosure
Image depicting an original drive enclosure.
This retrofit consists of replacing and installing components and wiring in the control panel and in an electrical enclosure beneath the condenser coil behind the control panel(s) of each circuit. See Figure 2 and Figure 3 for examples of original drive mounting. Be aware that original chiller controls may include exposed energized bus bar and terminals. Disconnect power and follow all lockout/tagout procedures before controls mounting or wiring.
Figure 3. Original drive installation
Image showing the original drive installation within an enclosure.
Figure 4. Typical RTAC fan control panel
Image of a typical RTAC fan control panel with multiple components.
⚠️ 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 discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.
- Connect a computer running TechView™ service software to the DynaView™ or EasyView™.
- Verify the unit is running the most updated chiller software. If it is not, load the latest software. Note: Minimum software version for retrofit is MP46.
- If updated software was downloaded, run the chiller and verify no alarms are present on the CH530.
- Turn off power to the machine, water pumps, and any field provided control power.
- 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 appropriate condenser fan motor(s) are inverter duty rated. If it is not, replace the motor(s). See Table 5 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
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 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 original drive enclosure underneath the condenser coil. See Figure 2.
- Remove the drive enclosure cover.
- Remove the variable speed drives being replaced.
- Speed and fault signal wiring may be removed.
- Locate the cover plates (PNL20506) in the loose parts of the kit.
- Install the cover plates over the opening left by the drives.
- 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 as device designator:
- 3TB1 for 2-compressor units.
- 3TB1 for 3- or 4-compressor units, circuit 1.
- 4TB1 for 3- or 4-compressor units, circuit 2.
- 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 old drive enclosure back to the fan control panel.
- Connect the motor wires to the wires running back to the control panel. These wires are color coded. See Table 6 for connections.
Table 6. Drive enclosure connections
| Connection(a) | Color | Description |
| 3TB1-1 or 4TB1-1 | Red | Fan 1 - L1 |
| 3TB1-2 or 4TB1-2 | Blue | Fan 1 - L2 |
| 3TB1-3 or 4TB1-3 | Black | Fan 1 - L3 |
| 3TB1-4 or 4TB1-4 | Green | Fan 1 - GND |
Table 6. Drive enclosure connections (continued)
| Connection(a) | Color | Description |
| 3TB1-5 or 4TB1-5 | Red | Fan 2 - L1 |
| 3TB1-6 or 4TB1-6 | Blue | Fan 2 - L2 |
| 3TB1-7 or 4TB1-7 | Black | Fan 2 - L3 |
| 3TB1-8 or 4TB1-8 | Green | Fan 2 - GND |
(a) See Step 9 for terminal block device designation information.
- Replace the enclosure cover of the former VFD enclosure.
- Open the fan control panel door. The new VFD(s) will be installed here.
- The new drive assembly is deeper than the original controls. The document holder must be removed to prevent interference. Use a small cutting wheel to cut the welds holding the document holder to the door. See Figure 5 for an example of a control panel door with the document holder removed.
Figure 5. Fan control panel with document holder removed
Image showing a fan control panel door with the document holder removed.
- Identify, label, and disconnect wires that will be reused. See Table 6 for a full list of reused connections. Wire numbers are provided for reference; however, the installer must verify this information for the unit being upgraded.
- Remove the four nuts holding the controls assembly to the back of the panel.
- Lift out the existing fan control assembly. See Figure 6 for an example of the control panel with controls removed. Note: For 575V units, do not discard original autotransformers. These will be reused.
Figure 6. Fan control panel with controls removed
Image of a fan control panel after the controls assembly has been removed.
Figure 8. Typical layout
Diagram illustrating the typical layout for mounting autotransformers.
- Open the lower left control panel door.
- Locate the Dual Inverter Interface LLID (1U3).
- Unplug 1U3 from the IPC Bus and remove the connected wiring.
- Remove 1U3 from the LLID mounting back plate.
New Controls Installation
- Lift the new controls assembly into the enclosure and align the mounting slots with the existing mounting studs.
- Secure the assembly using the original mounting nuts.
- See Figure 7 for an example of the new mounted fan control assembly.
Figure 7. Mounted fan control assembly
Image showing the new mounted fan control assembly.
- For 575-V units, the autotransformers from the original fan control assembly must be reused. For all other units, proceed to Step 5.
- Remove the autotransformers from the original fan control assemblies.
- Using the original autotransformer mounting hardware, mount the autotransformer to the new fan control assembly. Predrilled holes are located below the contactor mounting rails. When mounting, face the wiring connections towards the center of the assembly. See Figure 8 for typical layout.
- Locate two 4-A fuses in the loose parts of the kit. Replace 1F13 and 1F14 with these fuses.
- Locate six 6-A fuses in the loose parts of the kit. Replace 1F18-1F23 with these fuses.
- Locate the two transformer guards and four M4 screws in the loose parts of the kit. These guards and mounting screws are intended to cover the exposed autotransformer wiring terminals. Set these parts to the side so that they may be installed after the parts are wired.
- Locate the DUAL BINARY INPUT LLID (BRD04873) in the loose parts in the kit.
- Install this LLID in an open spot on the LLID mounting back plate.
- Label the LLID 1U26 if installed in control panel 1 or 2U26 if installed in control panel 2.
- Plug 1U26 (control panel 1) or 2U26 (control panel 2) into the IPC Bus.
- Locate the DUAL ANALOG I/O LLID (BRD04875) in the loose parts in the kit.
- Install this LLID in an open spot on the LLID mounting back plate.
- Label the LLID 1U27 if installed in control panel 1 or 2U27 if installed in control panel 2.
- Plug 1U27 (control panel 1) or 2U27 (control panel 2) into the IPC Bus.
- If installing this kit on a 4-compressor unit or circuit 1 of a 3-compressor unit, an addition relay is required. See "Field-Provided Material," for minimum requirements. One of the contactors being discarded may be reused for this purpose. Mount this relay on the controls backplate. Label the relay 1K20 if installed in control panel 1 or 2K20 if installed in control panel 2.
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 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 terminated on the new drive assembly. The same kit is used for all unit configurations. Refer to the original unit schematics and the schematics provided in the kit to determine which configuration is going to be used. Table 7 indicates the wiring connections that must be made.
Note: Wire numbering may vary from unit to unit due to configuration and design sequence. 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.
Table 7. Wiring connections
| Wire Identification | From Existing Unit Connection | To Drive Assembly Connection |
| 1E or 501E | Incoming Power Connection Device | 1X1-1 |
| 2E or 502E | Incoming Power Connection Device | 1X1-2 |
| 3E or 503E | Incoming Power Connection Device | 1X1-3 |
| 1J, 1R, 4C, or 501R | Incoming Power Connection Device | 1X2-1 |
| 2J, 2R, 5C, or 502R | Incoming Power Connection Device | 1X2-2 |
| 3J, 3R, 6C, or 503R | Incoming Power Connection Device | 1X2-3 |
| 3B3 or 4B3 (RED) | 3TB1 or 4TB1-1 | 1TB8-1 |
| 3B3 or 4B3 (BLU) | 3TB1 or 4TB1-2 | 1TB8-2 |
| 3B3 or 4B3 (BLK) | 3TB1 or 4TB1-3 | 1TB8-3 |
| 3B3 or 4B3 (GND) | 3TB1 or 4TB1-4 | 1TB8-4 |
| 3B13, 4B3, or 4B13 (RED) | 3TB1 or 4TB1-5 | 1TB8-5 |
| 3B13, 4B3, or 4B13 (BLU) | 3TB1 or 4TB1-6 | 1TB8-6 |
| 3B13, 4B3, or 4B13 (BLK) | 3TB1 or 4TB1-7 | 1TB8-7 |
| 3B13, 4B3, or 4B13 (GRD) | 3TB1 or 4TB1-8 | 1TB8-8 |
| 3B4, 3B13, 3B4, or 4B4 (RED) | CKT 1 or 2, FAN BANK 2 | 1K10-2 |
| 3B4, 3B13, 3B4, or 4B4 (BLU) | CKT 1 or 2, FAN BANK 2 | 1K10-4 |
| 3B4, 3B13, 3B4, or 4B4 (BLK) | CKT 1 or 2, FAN BANK 2 | 1K10-6 |
| 74A or 574A | 1U15 or 2U15-J2-7 | 1K10-A1 |
| 63K or 563K | 1TB5 or 2TB5-11 | 1K10-A2 |
| 3B4, 3B5, or 4B5 (RED) | CKT 1 or 2, FAN BANK 3 | 1K11-2 |
| 3B4, 3B5, or 4B5 (BLU) | CKT 1 or 2, FAN BANK 3 | 1K11-4 |
| 3B4, 3B5, or 4B5 (BLK) | CKT 1 or 2, FAN BANK 3 | 1K11-6 |
| 75A or 575A | 1U15 or 2U15-J2-4 | 1K11-A1 |
| 63Q or 563Q | 1K12-A2 | 1K11-A2 |
| 3B5, 3B6, 4B5, or 4B13 (RED) | CKT 1 or 2, FAN BANK 3 or 4 | 1K12-2 |
| 3B5, 3B6, 4B5, or 4B13 (BLU) | CKT 1 or 2, FAN BANK 3 or 4 | 1K12-4 |
| 3B5, 3B6, 4B5, or 4B13 (BLK) | CKT 1 or 2, FAN BANK 3 or 4 | 1K12-6 |
| 76A or 576A | 1U15 or 2U15-J2-1 | 1K12-A1 |
| 63J or 563J | 1K10-A2 | 1K12-A2 |
| 3B6, 4B4, 4B6, or 4B13 (RED) | CKT 1 or 2, FAN BANK 2 or 4 | 1K14-2 |
| 3B6, 4B4, 4B6, or 4B13 (BLU) | CKT 1 or 2, FAN BANK 2 or 4 | 1K14-4 |
| 3B6, 4B4, 4B6, or 4B13 (BLK) | CKT 1 or 2, FAN BANK 2 or 4 | 1K14-6 |
| 87A | 1U20-J2-7 | 1K14-A1 |
| 63U | 1TB5-13 | 1K14-A2 |
| 4B4 or 4B5 (RED) | CKT 2, FAN BANK 3 | 1K15-2 |
| 4B4 or 4B5 (BLU) | CKT 2, FAN BANK 3 | 1K15-4 |
| 4B4 or 4B5 (BLK) | CKT 2, FAN BANK 3 | 1K15-6 |
Table 7. Wiring connections (continued)
| Wire Identification | From Existing Unit Connection | To Drive Assembly Connection |
| 88A | 1U20-J2-4 | 1K15-A1 |
| 63X | 1K16-A2 | 1K15-A2 |
| 3B16, 4B5, 4B6, or 4B16 (RED) | CKT 1 or 2, FAN BANK 4 | 1K16-2 |
| 3B16, 4B5, 4B6, or 4B16 (BLU) | CKT 1 or 2, FAN BANK 4 | 1K16-4 |
| 3B16, 4B5, 4B6, or 4B16 (BLK) | CKT 1 or 2, FAN BANK 4 | 1K16-6 |
| 89A | 1U20-J2-1 | 1K16-A1 |
| 63W | 1K14-A2 | 1K16-A2 |
| 125A | 1T1 or 2T1-H1 | 1F13 |
| 126A | 1T1 or 2T1-H2 | 1F14 |
| 61A | 1T1 or 2T1-X1 | 1F15 |
| 62A | 1TB5 or 2TB5-1 | 1F15 |
| 116A | 1T1 or 2T1-X4 | 1F16 |
| 117A | 1U2 or 2U2-J2-2 | 1F16 |
In addition to the reused unit wiring, field provided wiring must be provided to connect the new drives to unit controls (LLIDS). LLID designators are provided for reference, but they may be different on the actual unit. See Table 8 and kit schematics for required control wiring. Remove any existing wiring from terminals being reused.
Note: 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 Quad Relay LLID to directly enable a drive, remove all existing wires connected to LLID terminals J2-10, 11, & 12 before connecting these terminals to the drive. When using an isolation relay to enable two drives on one circuit, use an individual pole for each drive.
Table 8. Field-provided drive control wiring
| From | To | |||
| Location | Description | Location | Description | Note |
| 1U27-J2-1 or 2U27-J2-1 | Analog I/O LLID | 1U28-53 | Drive 1 Speed Command | |
| 1U27-J2-3 or 2U27-J2-3 | Analog I/O LLID | 1U28-55 | Drive 1 Common | |
| 1U27-J2-4 or 2U27-J2-4 | Analog I/O LLID | 2U28-53 | Drive 2 Speed Command | |
| 1U27-J2-6 or 2U27-J2-6 | Analog I/O LLID | 2U28-55 | Drive 2 Common | |
| 1U26-J2-1 or 2U26-J2-1 | Digital Input LLID | 1U28-01 | Drive 1 Alarm | |
| 1U26-J2-2 or 2U26-J2-2 | Digital Input LLID | 1U28-03 | Drive 1 Alarm | |
| 1U26-J2-3 or 2U26-J2-3 | Digital Input LLID | 2U28-01 | Drive 2 Alarm | |
| 1U26-J2-4 or 2U26-J2-4 | Digital Input LLID | 2U28-03 | Drive 2 Alarm | |
| 1U15 or 2U15-J2-12 | Quad Relay LLID | 1U28-12 | Drive 1 +24 VDC | (a) |
| 1U15 or 2U15-J2-10 | Quad Relay LLID | 1U28-18 | Drive 1 Enable | (a) |
| 1U20-J2-12 | Quad Relay LLID | 2U28-12 | Drive 2 +24 VDC | (b) |
| 1U20-J2-10 | Quad Relay LLID | 2U28-18 | Drive 2 Enable | (b) |
| 1U15 or 2U15-J2-12 | Quad Relay LLID | 1TB5-3, 1TB5-5, or 2TB5-3 | 120V Hot | (c) |
| 1K20-Coil-1 or 2K20-Coil-1 | Relay Coil | 1K20-Coil-1 or 2K20-Coil-1 | Relay Coil | (c) |
| 1K20-Coil-2 or 2K20-Coil-2 | Relay Coil | 1TB5-11, 1TB5-13, or 2TB5-11 | 120-V Neutral | (c) |
| 1K20-1 or 2K20-1 | Relay Contact 1 | 1U28-12 | Drive 1 +24 VDC | (c) |
| 1K20-2 or 2K20-2 | Relay Contact 1 | 1U28-18 | Drive 1 Enable | (c) |
| 1K20-3 or 2K20-3 | Relay Contact 2 | 2U28-12 | Drive 2 +24 VDC | (c) |
| 1K20-4 or 2K20-4 | Relay Contact 2 | 2U28-18 | Drive 2 Enable | (c) |
(a) 2-compressor and circuit 2 of 3-compressor units only. (b) 2-compressor units only. (c) 4-compressor and circuit 1 of 3-compressor units only. (d) This connection may be existing.
For 575V units, the autotransformers will need to be wired between the drive fusing and the drives. See "New Controls Installation," p. 12, Step 4 for details regarding the mounting of the transformer. See Table 9 and kit schematics for details regarding transformer wiring. After wiring, mount the transformer guards included in the kit.
Table 9. Field provided wiring modifications for 575V units
| From Autotransformers Connection | To Drive Assembly Connection |
| 1T10-H1 or 2T10-H1 | 1F18 |
| 1T10-H2 or 2T10-H2 | 1F19 |
| 1T10-H3 or 2T10-H3 | 1F20 |
| 1T10-X1 or 2T10-X1 | 1U28-91 (L1) |
| 1T10-X2 or 2T10-X2 | 1U28-92 (L2) |
| 1T10-X3 or 2T10-X3 | 1U28-93 (L3) |
| 1T11-H1 or 2T11-H1 | 1F21 |
| 1T11-H2 or 2T11-H2 | 1F22 |
| 1T11-H3 or 2T11-H3 | 1F23 |
| 1T11-X1 or 2T11-X1 | 2U28-91 (L1) |
| 1T11-X2 or 2T11-X2 | 2U28-92 (L2) |
| 1T11-X3 or 2T11-X3 | 2U28-93 (L3) |
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), in accordance with NFPA70E for arc/flash protection, PRIOR to 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 "Binding," p. 16. Note: For 3- or 4-compressor units, go to Configuration Custom, and select the circuit you are modifying. Go to Variable Speed Fan Inverter Interface, and make proper selection.
- Upgraded Drive: Voltage Speed signal 0 to 10VDC
- Original Drive: Defined by manufacturing location (model number digit 9) and design sequence (model number digits 10,11).
Binding
Important: For 3- or 4-compressor units on which only once circuit was modified, the following steps should only be performed for the modified circuit.
1U26 and 1U27 must be bound to the unit controls for proper operations.
- Connect a computer running Techview™ Service software to the Dynaview.
- Enter the configuration view.
- Locate the field Variable Speed Fan Inverter Interface and change the selection to Voltage Speed Signal 0 to 10VDC.
- When all the configuration inputs are complete, click on the Load Configurations button at the bottom of the screen. The computer will go into think mode for a few seconds. Then a window called Binding View will pop up. Note: The LLIDs appearing on this list are dependent on selections made previously in configuration.
- Initially, 1U26 and 1U27 will show up as red frowning faces indicating they are unbound or not communicating.
- Select the LLID to be bound and click on the Bind button in the task bar.
- Locate the targeted LLID in the control panel, unit or starter and place the Trane provided magnetic screwdriver (South-pole magnet) near the LED under the SW1 arrow. The green LED turns on at the device.
- Click Yes in the dialog box. If the binding is successful, the red square changes to a green circle next to that LLID on the binding view menu. If the wrong type of LLID was selected during this binding process, an error message appears. Check the LLID Type column entry to be sure it corresponds to the physical LLID you selected with your magnet.
- Repeat Step 6 through Step 8 for the other LLID.
- Record in the control panel the new model number and confirmation code generated by the controls. This information will be required in the event the Dynaview™ needs to be replaced in the future.
Entering Drive Parameters
Drives are shipped with generic settings. These setting must be updated to reflect the drive application. Table 10 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 to 12 will cause a drive error. Parameter 5 to 12 MUST be set to (0) No Operation.
Table 10. Drive parameters
| Level 1 | Level 2 | Level 3 | Description | Settings |
| 0-** | 0-0 | 0-03 | Regional settings | North America |
| 0-4 | 0-06 | Grid Type | Unit Voltage | |
| 0-40(a) | [Hand on] Key on LCP | (0) Disable | ||
| 1-** | 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 | |
| 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 |
| 3-4 | 3-03 | Maximum Reference | 50/60(c) | |
| 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 | 380V -- 115% Other than 380V -- 125% | ||
| 5-** | 5-1 | 5-12(d) | Terminal 27 Digital Input | (0) No Operation |
| 5-4 | 5-40 | Function Relay | (0) Alarm (9) | |
| 6-10 | Terminal 53 Low Voltage | 0 V | ||
| 6-** | 6-1 | Terminal 53 Low Ref/Feeb. Value | 0 | |
| 6-14 | Terminal 53 High Ref/Feeb. Value | 50/60(c) | ||
| 6-15 | Switching Frequency | 5 KHz | ||
| 14-** | 14-0 | Function at mains Imbalance | (3) De-Rate | |
| 14-1 | 14-01 | Read Mode | (10) Auto Reset x 10 | |
| 14-2 | 14-12 | Automatic Restart Time | 30 s | |
| 14-5 | 14-20 | RFI Filter | (0) | |
| 14-21 | ||||
| 14-50 |
(a) Parameter 0 to 40 may be enabled for drive/rotation troubleshooting. (b) Parameters are from motor nameplate. (c) Use when the frequency is either 50 or 60 Hz. (d) The default setting for parameter 5 to 12 will cause a drive error. Parameter 5 to 12 must be set to (0) No Operation.
Optional Drive Parameter Copy Procedure
If 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 10.
- 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 programmed drive (#1).
- Replace LCP on 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. Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized.
- Place the drive in HAND mode. Note: Parameter 40 will need to be enabled.
- Turn the fan to low speed.
- Observe the fan 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 discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.
- 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.
- Connect the Dynaview™ to a computer running Techview™ Service Software.
- Because fixed-speed fan wiring has been modified, each fan bank must be checked for correct rotational direction. Use binding view to turn on each fixed-speed fan bank. Each fixed-speed fan bank will run for a short time.
- Observe each fan rotational direction.
- If the fan bank 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 discharge of capacitors. Verify with a CAT III or IV voltmeter rated per NFPA 70E that all capacitors have discharged.
- Return the machine to standard operating condition.
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