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Installation, Operation and Maintenance
CXAU Air-Cooled Modular Chiller /
Heat Pump
R410A
CXAU065/130
Only qualified personal 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.
Mayo 2023
SAFTY WARNING
PKGP-SVX19A-EN
Confidential and proprietary Trane information
690914770002
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Table of Contents
Troubleshooting
Related Manuals for Trane CXAU
Summary of Contents for Trane CXAU
- Page 1 Installation, Operation and Maintenance CXAU Air-Cooled Modular Chiller / Heat Pump R410A CXAU065/130 690914770002 SAFTY WARNING Only qualified personal 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.
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Page 2: Preface
This manual may not fully cover all situations encountered in the installation of this air conditioning units, please contact your local Trane sales office if you need more detailed information or encounter a specific question from a customer that is not described in detail in this manual. - Page 3 Preface Modular Air-Cooled Chiller (Heat Pump) Installation Completion Check Sheet for Application of Trane Service Installation Company: Installation Company Address: Owner Name/Company: Contact: Telephone: Unit Installation Address: Unit Model: IDU Barcode: ODU Barcode: Dealer: Contact: Telephone : Fax: Installation Company :...
- Page 4 Preface Modular Air-Cooled Chiller (Heat Pump) Installation Completion Check Sheet for Application of Trane Service d) The unit-equipped water filter is installed at the water entering of the unit with correct installation Yes ( ) No ( ) method e) Equipped with an entering and leaving pressure gauge and a shockproof hose...
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Page 5: Table Of Contents
Contents Preface................................2 Unit Model Number ............................. 8 Unit Dimension ............................9 Operation Map ............................10 Installation - Mechanical ..........................11 Pre-Installation Inspection ......................... 11 Lifting and Moving Instructions ........................11 Mounting Locations ........................... 12 Water System Installation .......................... 15 Circulating water treatment requirements ....................20 Water flow and pressure drop ........................ - Page 6 Please confirm that the unit is in a power-off state before servicing. Maintenance should only be carried out by professional maintenance personnel. If maintenance and repair are ● required, please contact Trane Sales. Improper maintenance and repair may result in water leakage, electric shock or fire. ●...
- Page 7 Introduction WARNING ● Optional parts mush be installed by professionals. Be sure to use the optional parts provided by TRANE. Improper installation can lead to water leakage, electric shock and fire. ● Please do not charge unqualified refrigerants, refrigerant substitutes or refrigerant additives. Incorrect charge methods or charge of unqualified refrigerants, refrigerant substitutes or refrigerant additives will cause unit damage and safety hazards.
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Page 8: Unit Model Number
Introduction Unit Model Number Digit 1 C = Chiller Digit 2 X = Heat Pump Digit 3 A = Air-source Digit 4 U = Modular Digit 5,6,7 Nominal Cooling Capacity/Heating Capacity 065 = 65 kW 130 = 130 kW Digit 8 Unit Voltage 5 = 380V/50Hz/3Ph 6 = 380V/60Hz/3Ph... -
Page 9: Unit Dimension
Introduction Unit Dimension CXAU065-VS 1790 (163) Inlet Rc2" Outlet Rc2" 4-Ø40 Lifting Hole CXAU130-VS 1860 4-Ø12 Install Hole Inlet Rc2-1/2" Outlet Control Box Rc2-1/2" 1660 4-Ø47 1150 Lifting Hole 2206 PKGP-SVX19A-EN... -
Page 10: Operation Map
Introduction Operation Map CXAU065/130-VS Description Scope of application Cooling: -20~48 °C The ambient temperature range of the unit operation Heating: -30~48 °C Cooling: 5~20 °C The outlet water temperature range of the unit operation Heating: 30~55 °C °C The ambient temperature range of the controller operation -10~60 The relative humidity range of the controller operation <90%... -
Page 11: Installation - Mechanical
● When receiving the unit, please carefully check whether damage has been caused during shipping. If so, please record it on the delivery note and notify the carrier’s terminal within 72 hours, and at the same time notify the local Trane sales office. -
Page 12: Mounting Locations
If they are needed to install in this kind of place, please do your own sound insulation treatment. The unit should not be installed close to doors and windows. For special requirements, please consult Trane ●... - Page 13 Installation- Mechanical CXAU065/130 Installation Platform and Clearance Air Exhaust Air In Air In Air In Air In Air In Service Service Service Clearance Clearance Clearance 1186 4-Ø12 Install Hole 6-Ø10 Install Hole Control Box Control Box Control Box 1860 8-Ø40 Drainge Port Note: Enough maintenance clearance need to be reserved around the unit.
- Page 14 Installation - Mechanical CXAU065/130 Single Unit Installation Clearane Flow Guiding Device ≥600 ≥600 ≥600+h1 ≥600+h2 ≥600 ≥600 CXAU065/130 Multi-Units Installation Clearance ≥ ≥ ≥ ≥ ≥ PKGP-SVX19A-EN...
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Page 15: Water System Installation
Installation- Mechanical Snow Protection For the installation in the area where there is more snow, it is necessary to raise the unit, and install snow covers to make sure unit running normally. During heavy snowfall, please check the round-tube-plate-fin heat exchanger, if the heat exchanger is covered by heavy snow, manually clean the snow is needed. - Page 16 Installation - Mechanical Water system capacity: The water system capacity will affect the number of starts/stops of the compressor, as well as the defrosting effect in heating mode. The minimum water system capacity volume should be met, if not, an energy storage water tank needs to be installed at the suction port of the water pump to meet requirement.
- Page 17 Installation- Mechanical used, they can be used with combination of three-way valves, and the quantity of two-way valve could be 1/3 of total valves and the quantity of three-way valves could be 2/3 of total valves. Two-way valves should be installed for the FCUs which are near to the unit, and three-way valves be installed for the FCUs which are far from the unit.
- Page 18 Installation - Mechanical a temperature sensor on the main supply pipe of the water system so that the supply water temperature sensor of the system can be installed. Hydraulic Test: After the installation and connection of the water system pipeline, hydraulic test should be carried out. The accuracy of the pressure gauge should be higher than 0.01MPa, and the test pressure is 1.5 times the highest working pressure.
- Page 19 Installation- Mechanical 6). The flow speed of the water of the unit should not be too large, otherwise the friction resistance is too large. The general friction resistance range is 100~300Pa/m, and the optimal range is 150~200Pa/m. Piping size is recommended according to the following speed.
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Page 20: Circulating Water Treatment Requirements
Installation - Mechanical Return Water Host Unit SV-1 Slave Unit 1 SV-N Slave Unit N Supply Water Installation of total leaving water temperature sensor a). The total leaving water temperature sensor should be placed in the straight pipe section at a distance of more than 2m from the water outlet, not on the elbow, and more than 1m away from the elbow to ensure uniform temperature mix at the water outlet;... - Page 21 Installation- Mechanical CAUTION ● The user needs to regularly test the water quality before the installation and during the operation to ensure that the water quality meets the requirements of the above table. Once the water quality exceeds the allowable range for a long time, there’s possibility corrosion leakage and serious scaling for the heat exchanger.
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Page 22: Water Flow And Pressure Drop
Installation - Mechanical CAUTION ● The user needs to regularly test the water quality before the installation and during the operation to ensure that the water quality meets the requirements of the above table. Once the water quality exceeds the allowable range for a long time, it’s possibility of corrosion leakage and serious scaling for the heat exchanger. -
Page 23: Installation - Electrical
CN3 is the connection port of the centralized controller which is only connected to the host unit. CN24 is the connection port for DTU (not applicable for exported CXAU). The control signal for the external water pump should be connected between the active terminals 50 and 51. -
Page 24: Unit Power Connection Diagram
Installation - Electrical 13. When using the remote switch, connect the remote switch between terminals 10 and 11, press the power on button of the centralized control screen, and set the power-off memory function to be effective, and then control the unit by on/off signal. 14. - Page 25 Installation - Electrical Inside of Unit U V W N 40 41 42 43 50 51 52 53 58 59 60 61 10 11 12 13 14 15 16 17 18 19 Power AC380V 3+N 50/60Hz AC460V 3+N 60Hz Customer’s power line, recommended that each unit equipped with speatate circuit breaker; Passive dry contact output for signal RUN, specification 220/230VAC/2A, terminals 40 and 41.
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Page 26: Field Wiring Example
12 External passive switch input, OVHT is single for water circuit electrical heater overload access between terminals 18 and 19. Normally when connected and fault when disconnected. Factory short circuit. Field Wiring Example CXAU Passive Control Field Wiring Example RUN：Passive Output AL：Passive Start-up：Connected... -
Page 27: Pre-Start
Pre-Start Check List Before Start 1. Check the connection of all wiring, all electrical contacts should be clean and firmly locked. 2. Check whether power supply voltage is normal. 3. Fill the chilled water system, keep the exhaust valve of the system open when filling, and close it when water filling completed. - Page 28 Pre-Start SW1 is reserved SW2 is number of slave units :0000~1111, binary, corresponding to 0~15; SW3 is external address :0000~1111, binary, corresponding to 0~15; SW2 and SW3 are both binary. Weight calculation rules: counting from right to left based on 0, and the weight of the nth bit is The correspondence of the 16 numbers is: 0000 1000...
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Page 29: Controller
Controller Application and Dimension ● The device is used for centralized control of Trane air conditioning modular CXAU products, and up to 16 CXAU units can be connected to one device; ● Working power supply: 220/230VAC; ● Working environment: temperature -10~60°C, humidity < 90% RH;... - Page 30 COM2 terminal block on the touch screen according to the following correspondence: RS485 Line COM2 Terminal Shielding layer No shielding layer Centralized Controller Modular CXAU Components Description: 1). The left side is the switching power supply MODBUS Max 16 OD units 2). The right side is the touch screen...
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Page 31: Centralized Controller With Touch Screen
Controller Centralized Controller Diagram POWER COM1 COM2 COM4 V- V+ A B G A B G MODBUS RTU AC 2 V 50/60Hz Host Unit HOST COMPUTER Centralized Controller with Touch Screen The centralized controllers can control up to 16 units. Wiring Diagram of single-group centralized control systems A bus can connect up to 16 modules (including host unit). - Page 32 Controller Customers can connect up to 16 centralized controllers by the host computer (the host computer needs to be controlled by customers). MODBUS.RTU Max. 16 units RS485.Communication RS485.Communication Controller 1 Customer host computer MODBUS.RTU RS485.Communication Controller 2 Max. 16 groups Controller 16 ●...
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Page 33: User Operation Guide
Controller User Operation Guide Home Page ● After the controller is powered on, the language selection page is displayed, and then Home page shows after language selected. ● The Home page is as follows, showing the general operating status. Press the button on the right menu to enter the Group page. - Page 34 Controller ● The Group page is shown as below, displaying the status of each connected unit. ● In the Group page, press a unit area to display the operating status of the main components of the selected unit. PKGP-SVX19A-EN...
- Page 35 Controller User Page ● Press the User button on the right of any pages, enter the password “11111111”, and then enter the User page. ● In User page, there are options for General Setting, Advanced Setting, Parameter, Language Setting, Other Settings. PKGP-SVX19A-EN...
- Page 36 Controller Change Operation Modes and Temperature Settings ● On the User >> General Setting page, press the Running Mode, and the operating mode will be switched cyclically. ● On the User >> General Setting page, press the Entering Water Temperature Setpoint(cooling) or Entering Water Temperature Setpoint(heating) to set the temperature.
- Page 37 Controller User >> Advanced Setting ● On the User >> Advanced Setting page, you can modify the Noise Reduction Setting of each unit and press the Noise Reduction Setting to switch the noise reduction mode cyclically. ● Pressing the right arrow below will take you to the manual defrosting page. Note: The selected mode must be supported by the current unit, otherwise it is an invalid mode.
- Page 38 Controller ● Press the right arrow to enter the Power-off Memory settings. Note: Please perform these settings under guidance of maintenance personnel. ● On the Power-off Memory page, set the fixed time for ON and OFF every day of the week, and select whether to enable it in the Working Day column.
- Page 39 Controller User >> Parameter ● Status of the components of the air conditioning system are shown in the Parameter page. ● Press the right arrow to enter the single unit parameter browsing. ● Entering Water Temperature, Leaving Water Temperature and Ambient Temperature of a single unit are shown in this page. PKGP-SVX19A-EN...
- Page 40 Controller Start and Stop the Unit ● Start Press the ON button at the bottom right of any page during the shutdown state, and the Confirm message box will pop up, and the module group will enter the start process. The ON button will turn to OFF in green after start. ●...
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Page 41: Alarms And Troubleshooting
Controller Alarms ● Press the Alarms button to display the alarm messages. The text is red when alarm occurs, and the time of occurrence is displayed. ● After the alarm is solved, the text of the alarm message turns black and the alarm resolution time is displayed. Service ●... -
Page 42: Unit Operation
Unit Operation Start Up Procedures Turn on the power supply of the unit, select cooling or heating mode on the control panel, and then press the start button on the control panel to start the unit. Check the following items to ensure the normal operation of the unit after running for more than 30 minutes and the system is running stably. - Page 43 Unit Operation High Pressure Protection (HP1, HP2) The unit has a high pressure protection function, and when the protection setpoint is reached, the corresponding system will alarm and stop. Winter Anti-Frost Protection Heat pump unit: In winter, when the unit is in standby state and the water temperature is lower than the winter anti-freeze temperature setpoint, the unit automatically switchs to anti-freeze operation.
- Page 44 Unit Operation Ambient temperature Lockout Protection If ambient temperature is out of range when starting the unit, it is forbidden to start and report alarm; If the ambient temperature is out of range after it is powered on, it automatically shuts down and reports alarm. WARNING After power-on, the unit force the electric heater of compressor to preheat for 30min, during which the unit could not start.
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Page 45: Alarm Troubleshooting
Alarm Troubleshooting Item Diagnostic or Protection Description Category Solution 1# Low Water Flow Unit All systems perform alarm and stop process 1# Flow Switch Error Unit The unit is prohibited from starting 1# Large Diff for EWT and LWT in Heating Unit All systems in the unit perform the system unloading process 1# EWT and LWT Abnormal... - Page 46 Alarm Troubleshooting Item Diagnostic or Protection Description Category Solution 1# Refrigerant Leakage Ckt2 system System alarm stop and process 1# Discharge Temp Sensor Ckt2 system System alarm stop and process 1# Coil Temp Sensor Ckt2 system System alarm stop and process 1# Suction Temp Sensor Ckt2 system System alarm stop and process...
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Page 47: Maintenance
Maintenance Routine maintenance needs to be done by qualified professionals. To keep normal operation of the unit, extend the service life and reduce the possibility of failure, please regularly implement the following check items and adjust parameters and necessary maintenance, and do records, which helps maintenance personnel to diagnose. Daily Regular Checks 1. - Page 48 Maintenance WARNING Do not use steam to clean the condenser, otherwise it will cause the internal pressure to rise and make the refrigerant pressure higher than design pressure, refrigeration system leakage after destruction. Inspection and cleaning of the evaporator Please check the water temperature of the evaporator entering and leaving regularly, and compare the saturated evaporation temperature during cooling or the saturated condensation temperature during heating.
- Page 49 Maintenance Name and Content of Hazardous Substances in the Product Part Hazardous Substances (Pb) (Hg) (Cd) Cr(VI) (PBB) (PBDE) Motor × ○ × ○ ○ ○ Heat Exchanger ○ ○ ○ ○ ○ ○ Filter ○ ○ ○ ○ ○ ○...
- Page 50 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.