Table of Contents
Advertisement
Quick Links
Installation, Operation, and Maintenance
Thermafit™ Modular Water-Cooled
Chiller/Water-to-Water Heat Pump
Models MWC and WXM
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.
February 2024
SAFETY WARNING
ARTC-SVX010A-EN
Advertisement
Table of Contents
Related Manuals for Trane Thermafit MWC Series
Summary of Contents for Trane Thermafit MWC Series
- Page 1 Installation, Operation, and Maintenance Thermafit™ Modular Water-Cooled Chiller/Water-to-Water Heat Pump Models MWC and WXM 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.
- Page 2 (HCFCs). Not all refrigerants containing these compounds bump cap, fall protection, electrical PPE and arc have the same potential impact to the environment. Trane flash clothing). ALWAYS refer to appropriate advocates the responsible handling of all refrigerants.
- Page 3 This document and the information in it are the property of regulations are more stringent than these Trane, and may not be used or reproduced in whole or in policies, those regulations supersede these part without written permission. Trane reserves the right to policies.
-
Page 4: Table Of Contents
Table of Contents Model Number and Coding ....6 Installation Piping......21 Chiller/Heat Pump Model and Serial Install Piping and External Numbers . - Page 5 Table of Contents Module Layout Screen Status MWC Variable Flow Sequence ..56 Conditions ......34 WXM Operations .
-
Page 6: Model Number And Coding
Chiller/Heat Pump Reference Data. Refer to the Trane nameplate on each module in the installed unit for the serial number and model number. Table 1. Chiller/heat pump reference data... -
Page 7: Chiller/Heat Pump Description
This manual provides relevant data to properly operate, Water quality must be monitored and maintained by a maintain, and troubleshoot the Trane Thermafit™ MWC water treatment professional familiar with the materials of and WXM Chiller/Heat Pump. Operator and maintenance construction and operation of the equipment. - Page 8 Chiller/Heat Pump Description Brazed Plate Condenser/Evaporator The MWC and WXM chiller/heat pump uses a dual circuit, brazed-plate heat exchanger on each module constructed of 316 stainless steel plates and copper brazing. The supply and return fluid piping connections to each heat exchanger include manual isolation valves to allow servicing of each module individually while the remaining modules continue to operate.
-
Page 9: General Data
General Data Table 2. General Data - Thermafit™ MWC Chiller Capacity (Tons) General Unit Number of Independent DUAL DUAL DUAL DUAL DUAL DUAL DUAL DUAL Refrigeration Circuits R-454B Refrigerant Charge (lbs/module) R-454B Unventilated 1011 1321 1672 4645 6690 9993 13958 Room Area (sq.ft.) R-513A Refrigerant Charge (lbs/module) - Page 10 General Data Table 2. General Data - Thermafit™ MWC Chiller (continued) Capacity (Tons) Minimum/Maximum Leaving Brine 90-140 90-140 90-140 90-140 90-140 90-140 Temperatures (°F) Condenser Type Shell And Tube Shell And Tube Shell And Tube Shell And Tube Shell And Tube Shell And Tube Quantity Minimum Water/Brine Operating Pressure (psig)
-
Page 11: Unit Dimensions And Weights
General Data Table 3. General Data - Thermafit™ WXM Heat Pump (continued) Capacity (Tons) Maximum Water/Brine Operating Pressure (psig) Hi Pressure Option Material (plates/brazing) 316 SST/CU 316 SST/CU 316 SST/CU 316 SST/CU 316 SST/CU 316 SST/CU 316 SST/CU 4-inch pipe headers. 6-inch pipe headers. - Page 12 General Data Figure 2. WXM water-to-water heat pump modulars - 20 to 80 tons Table 5. Unit dimensions and weight: 20 to 80 tons (WXM) Unit Sizes and Weights Per Module Units 20 Tons 25 Tons 30 Tons 40 Tons 50 Tons 60 Tons 80 Tons...
-
Page 13: Pre-Installation
Note: These clearances are general recommendations. Each installation has specific considerations. After setting and lubricating the mounting rails, begin Contact Trane for definitive guidance and approval installing the modules. All of the modules arrive with labels on a job-by-job basis. - Page 14 Pre-Installation vibration isolation pads can be installed under each For vibration isolation, spring isolators or rubber-in-shear module. After setting each module, remove front or rear isolator pads must be installed under the structural steel access panels to improve access to components when mounting rails.
-
Page 15: A2L Work Procedures
At all times, Trane’s maintenance and service guidelines • Do not puncture refrigerant tubing. shall be followed. In in doubt, contact Trane technical support for assistance. • Dispose of properly in accordance with federal or local regulations. -
Page 16: Leak Detection
Use control settings, where available. When not available, manually open all electronically controlled valves using • Replace electrical components with Trane replacement acceptable service procedures. parts, or those meeting the same ratings and qualified for flame arrest protection, UL LZGH2 category. -
Page 17: Decommissioning
A2L Work Procedures • Cylinders shall be kept in an appropriate position a. Mechanical handling equipment is available, if according to the instructions. required, for handling refrigerant cylinders. • Ensure that the refrigerating system is earthed prior to b. All personal protective equipment is available charging the system with refrigerant. -
Page 18: Installation Mechanical
Verify the correct model number and that all skids and cartons have been delivered. Any damage must be Long Term Storage reported to the motor carrier and Trane within five days of receipt of the shipment. Requirements Inspect all exterior components for concealed damage as Appropriate preparation and storage of Trane chiller/heat soon as possible. -
Page 19: Customer Responsibilities
Installation Mechanical Trane will document and photograph the status of the unit Note: Damage from improper handling will not be covered prior to shipment and carry out the instructions detailed in by warranty. the factory order regarding in-shop preparation of units for WARNING long-term storage. -
Page 20: Rigging, Lifting, And Moving The Chiller
Installation Mechanical Rigging, Lifting, and Moving the Figure 5. Recommended chiller/heat pump rigging assembled unit Chiller/Heat Pump The Thermafit™ modular water-cooled MWC and WXM chiller/heat pump can be delivered to the customer’s site as individual modules. Limitations on the methods and materials that can be used to rig, lift, or move a chiller/heat pump system or an individual module include: •... -
Page 21: Installation Piping
Installation Piping Install Piping and External the pipes. A 40-mesh screen strainer must be installed in each water/liquid system piping inlet for proper filtration an Components protection of the heat exchangers. The following figure provides a recommended installation of components. Proper support of piping and pipe hangers must consider the weight of the piping as well as the water weight inside Figure 6. -
Page 22: Installation Electrical
Installation Electrical Connecting Module Power and Phase Monitor Installation Control Wires The chiller/heat pump is equipped with a phase monitor on the power distribution panel. It is connected to the Connections are typically made at the power distribution corresponding digital input of the primary microprocessor panel located on one end of the chiller/heat pump system controller. -
Page 23: Module Control Wiring
Installation Electrical 7. Attach ground to lug/bar inside cabinet. Tighten after all 10. Connect the Ethernet cable to the J30 port on the grounds have been run. microprocessor. 8. Control wires are in series. Attach the control wires to Module Control Wiring the correct module microprocessor. -
Page 24: Operating Principles
Load and Source/Sink Brazed Refrigerant R-454B Plate Heat Exchanger (WXM) Trane believes responsible refrigerant practices are important to the environment, our customers, and the The load and source/sink heat exchanger are dual circuit modular chiller industry. and brazed plate constructed of 316 stainless steel plates and copper brazing. - Page 25 Operating Principles evaporator fluid temperature. There cannot be heat recovery unless there is a cooling load. ARTC-SVX010A-EN...
-
Page 26: Operating Procedures
Operating Procedures Operator Interface Panel-Mounted Disconnect Switch Some chiller/heat pump optionally equipped with a panel- Thermafit modular water-cooled units, whether they are mounted disconnect switch installed on the outside of the composed of a single module or up to 12 modules, are power distribution panel (or a circuit breaker disconnect on automated systems that use a main electrical panel to the high voltage electrical panel of each module if the... -
Page 27: Panel
Operating Procedures Module Electrical and Control Panel module has its own high voltage electrical panel and low voltage control panel that distributes electricity to individual The electrical and control panel receives power from the components. It also has fuses and breakers, compressor power distribution panel and provides power to the switches, and the microprocessor controller. -
Page 28: Controllers
The higher access levels are the technician Figure 10. Typical controller network (‘tech’) and administrator (‘admin’) levels that can only be accessed by Trane technical personnel. Contact Trane technical support regarding the possibility of any potential issues involving the higher-level functions. -
Page 29: Touchscreen Interface Panel
Operating Procedures parameters within each module of the chiller/heat pump system. Touchscreen Interface Panel The touchscreen interface panel is used to adjust set points, clear alarms, and perform detailed setup of the microprocessor controllers. The touchscreen interface panel displays information on its touchscreen whenever specific keys and buttons are pressed by the operator (See following figure). -
Page 30: Touchscreen Interface Tutorial
Operating Procedures Touchscreen Interface Tutorial Interface Menu Structure This section consists of a tutorial that first-time personnel Key interface screens are organized according to system, can use to navigate through the various functions and primary module, and secondary modules functions. See features that are available in the interface. - Page 31 Operating Procedures Table 6. Home screen features Feature Description 1 - HMI Software Version Calls up the pop-up window. See figure below. • Project Name: HMI software project name • Software Version: HMI software version • Consists of 4 two-digit numbers –...
- Page 32 Operating Procedures Table 6. Home screen features (continued) Feature Description 5 - Setpoint Calls up cooling/heating setpoint pop-up screens respectively depending on the Mode. Accessible for 'tech' only. These dialog boxes themselves display the resulting cooling/heating setpoint used for machine temperature control. Note: The only box on these pop-ups accessible for 'tech' user.
- Page 33 Operating Procedures Table 6. Home screen features (continued) Feature Description 10 - Module/Compressor • Modules Online/Avail/Setup. Number of modules communicating with Primary Module including Primary Module/available Status for Primary/Secondary temperature control and number of modules set up for Primary/Secondary temperature control. •...
-
Page 34: Modules Layout Screen
Operating Procedures Modules Layout Screen displays the screen showing the status of compressors and valves in each module. See figure below. Each module diagram is a set of symbols and colors that show the real-time status of the compressors, the refrigeration circuit, the isolation valves and the module overall. -
Page 35: Active Alarms Screen
Operating Procedures Table 8. WXM Module status conditions Module is available Module is unavailable Module turned off by alarm and unavailable Refrigeration circuit in normal state; Refrigeration circuit in alarm state; Refrigeration circuit is non-operational; Compressor OFF Compressor OFF Compressor ON Isolation Valves: - Valve LED is green = valve is open - Valve LED is gray = valve is closed... -
Page 36: Alarm History
Operating Procedures 5. Not Triggered – Alarm no longer appears (inactive), The alarm history screen displays the history of alarms acknowledged, and reset (removed from Active Alarms recorded by the primary microprocessor. See the following list) figure. Figure 20. Alarm history State Alarm is considered “Active”... - Page 37 Operating Procedures 4. Not Triggered Acked – Alarm no longer appears ‘Status Filter’ applies to ‘Alarm Status’. (inactive) and acknowledged 5. Not Triggered – Alarm no longer appears (inactive), acknowledged, and reset (removed from Active Alarms list) State Alarm is considered “Active” (Triggered) if State Value = 1 (still active in the PLC) When Show Alarm Event is selected from the Status Filter If alarm is “Not Active”...
-
Page 38: Module Access
Operating Procedures Module Access Overview Module Screen Buttons to access all chiller/heat pump modules screens individually. Number on the button “M(X)” stands for the module number in the bank. Buttons are viewable Each module controlled by the microprocessor controller (modules accessible) for modules that communicate to HMI has its own module screen within which the operator can only. -
Page 39: Overview Module
Operating Procedures Table 10. The overview screens (WXM) WXM – Primary Overview Module Screen WXM – Secondary Overview Module Screen WXM – Primary/Secondary Overview Circuit Screen Overview Module • Refrigeration Evacuation Cycle - Module is running Refrigeration Evacuation Cycle. Module En/Dis Note: Applies only to MWC. -
Page 40: Overview Circuits
Operating Procedures Primary Status • Heat St Up/Dwn Dly – When next compressor has been staged up/down, this delay has to elapse before next Applies to primary PLC only. Possible options: compressor is allowed to stage up/down in Heating • Primary ON - All primary modules conditions are Mode. - Page 41 Operating Procedures • OFF by Min DP - Compressor is off due to inability to • Volts - If PLC analog output is used to control variable build up satisfactory Suction/Discharge differential speed compressor. pressure. • RPM - Compressor speed is communicated to external •...
-
Page 42: Module I/O Screens
Operating Procedures Module I/O Screens output). The third screen, Expansion #1, applies to the primary and secondary module. The fourth screen, Data is collected by sensors as either analog or digital Expansion #2, applies only to the primary module. signals and displayed on the IO Status screens. When the module screen is displayed, pressing the I/O button displays the I/O menu. -
Page 43: Wxm Analog Inputs
Operating Procedures This input indicates Liquid Line Temperature Circuit 1. This output indicates condenser isolation valve position. This input indicates Liquid Line Temperature Circuit 2. This output indicates the evaporators isolation valve position. This input indicates Suction Pressure Circuit 2. This output indicates the variable speed compressors hard- AI10 wired control signal. -
Page 44: Wxm Digital Inputs
Operating Procedures WXM Digital Inputs DO10 General Alarm – this output energizes when any of the Digital input (DI) data includes these parameters: following alarms occur: • An alarm that shuts down and locks out compressor 1 Remote On/Off – Used to turn module on/off via input. For or 2. -
Page 45: Wxm Expansion I/O Screens
Operating Procedures These screens are only applicable to the primary module. The screens control analog inputs and digital requests. This input shows Compressor 1 External Alarm. DI closed – no alarm. DI open – compressor in alarm. Screen #1 DI10 This input shows Compressor 2 External Alarm. -
Page 46: Trend Screen
Operating Procedures Trend Screen This input shows the Pump-down pressure switch of Circuit 2. DI closed – pressure is in the normal range; DI opened – pressure is exceeding normal range threshold (faulty When on the primary module screen, pressing the trend state). - Page 47 Operating Procedures Table 14. Trend screen labels (continued) Label Description Maximum and Minimum thresholds for trends viewing. Used for zooming in on trends variables axis. Both Maximum and Minimum thresholds are adjustable via respective numeric boxes. Default Min/Max values: –10.0/160.0.. Default Span button is used to revert to defaults to reset longitudinal zooming.
-
Page 48: Setup Screen
Operating Procedures Setup Screen Description Feature Note: Available for tech user only. Parity BMS communication frames parity. The options are: When on Overview Module screen, press Setup button to • None go to BMS Communication Setup screen. • • Even Stop Bits Number of BMS communication frames Figure 22. -
Page 49: Emergency Power Shutdown
The results will enable the accurate panel door. adjustment of quality thereby increasing the operational life of the chiller/heat pump. Note: Trane will not validate the chiller/heat pump warranty if the proper water/glycol mixture composition and quality is not maintained. ARTC-SVX010A-EN... -
Page 50: Maintain Glycol Level
However, the best freeze prevention is using the appropriate concentration of glycol. surfaces. Trane does not warranty any component that fails due to Do not use automotive antifreeze. freezing. Propylene Glycol... - Page 51 Operating Procedures concentrated in glycol. This ice/water/glycol mixture results estimates for chiller/heat pump with copper evaporators. in a flowable slush, and remains fluid, even as the The percentages may vary depending on the materials and temperature continues to cool. alloys of the heat exchangers, total surface area, the amount of present or future fouling, and the brand of glycol The fluid volume increases as this slush forms and the used.
-
Page 52: Controls Interface
Controls Interface Microprocessor Control System Figure 25. Touch interface panel The Thermafit MWC and WXM chiller/heat pump models employ a Carel c.pCO all-digital data control system to control and report key system settings and indicators. Primary Microprocessor Controller Both the primary and secondary modules use a Carel c. pCO medium microprocessor controller. -
Page 53: Electrical Controls
Controls Interface Main Power Distribution Figure 27. Module electrical panel The power distribution panel distributes electricity from the external building power supply. It also houses a circuit breaker for each module, a phase monitor, and an optional main power disconnect switch. See figure below. Figure 26. -
Page 54: Refrigeration Controls
Controls Interface NOTICE or 8 o’clock positions on the pipe for the most accurate pressure measurement. Proof of Flow Switch! Ensure that the closed cell insulation covers the thermal Failure to provide flow switches or jumping-out of expansion valve sensing bulb. If insulation is missing, the switches could result in severe equipment damage. - Page 55 Controls Interface NOTICE delay times out the normal controls are put back on line within the control circuit. Equipment Damage! Thermal Capacity Failure to remove moisture from system could cause corrosion within the chiller/heater components, and The thermal capacity of the chiller/heat pump modules is degrade performance.
-
Page 56: Sequence Of Operations
Sequence of Operations This manual describes a typical water-cooled chiller system sequential module (or the second compressor of the with few, if any, optional components or devices attached. second module if there are only two modules) is brought on-line. This process occurs throughout the operating range of the chiller system when there is Constant Flow Sequence increasing cooling demand. -
Page 57: Wxm Operations
Sequence of Operations pressure differential across the chillers (the evaporator 12. Regardless of demand and leaving fluid temperature, in each module contains a fine mesh strainer which can there must be no less than 5 minutes between skew differential pressure readings). The VFDs allows successive compressor(s) de-energizing. - Page 58 Sequence of Operations before Lead is rotated. Demand Rotation rotates Lead staging-down, Stage-Down Delay has to count down to when the last compressor is staged off. ‘0’ before next compressor turns off. 7. Primary Controller constantly monitors the Controlled a. When next Heat Pump Module comes into Temperature and checks if it falls within Temperature operation, it first opens its Load and Source Control Band.
-
Page 59: Start-Up
8. Confirm the oil level is correct in each compressor. WARNING Note: If Trane pumps are provided, check that each Hazardous Voltage! pump’s overload setting matches the nameplate Failure to disconnect power before servicing could amperage of the pumps as described previously. - Page 60 Check the box if there are any customer-supplied devices connected to the chiller/heat pump wiring. ☐ List devices: ______________________________________________________________________________________ Check the box if there are any Trane remote devices connected to the chiller/heat pump wiring. ☐ Check the box if voltage drops are detected.
- Page 61 Start-Up Table 18. Initial start-up readiness checklist (continued) Start-Up Readiness Dimension ☐ ☐ Check the box if high voltage wiring is installed, tested, and functional. ☐ Check the box if all water, refrigeration, and electrical connections between chiller/heat pump modules are completed. ☐...
-
Page 62: Maintenance Procedures
The primary goal of preventive maintenance is to avoid the chiller/heat pump so that anomalies become evident consequences of failure of equipment. Trane chiller/heat when they occur. pump components are designed to be easily accessed for •... -
Page 63: Federal Clean Air Act
Maintenance Procedures NOTICE may have additional requirements that must be followed to responsibly handle HVAC refrigerants. Component Damage! Failure to follow instructions could damage sensitive Inspection and Maintenance electronic components beyond repair. Schedule To prevent arcing or surges of electrical current, do not use wires or cables to jump components or Proactive measures should be taken to prevent potential bypass the manufacturer's safety systems. -
Page 64: Weekly
Maintenance Procedures Table 19. Recommended chiller/heat pump service intervals (continued) Frequency Task Compare fluid flow against design specifications Annually Tighten rotalock fittings, if equipped Annually Weekly pump that lacks proper refrigerant velocity to return oil to the compressor sump. Eventually, dry compressor Weekly inspection is a continuation and elaboration of daily starts could occur causing premature compressor best practice:... -
Page 65: Annually
Maintenance Procedures 1. Inspect alarm log, refrigerant operating/static 1. Inspect all electrical connections for damage and pressures, and temperature set points of each module ensure terminals are tight. Inspect all contactors for independently. pitting and corrosion and replace as necessary. 2. -
Page 66: Maintenance Tasks
8. Re-install the strainer in the housing (large end first). determine the optimum frequency for BPHE cleaning. Replace the gasket and end cap and tighten coupling On multiple module chiller/heat pumps , Trane provides collar securely. service isolation valves on each BPHE to isolate each 9. -
Page 67: Pump Tasks
A small quantity of fluid mixture will be lost during this operation. Although propylene glycol does not pose an environmental hazard, it is Trane recommends using SWEP & Goodway® the installers responsibility to adhere to local Technologies ScaleBreak-MP, an industrial biodegradable... - Page 68 Maintenance Procedures Note: The pump suction pipe stub must be positioned 90 3. Remove all electrical wiring and flex conduit from the degrees to the right of the pump to mate up to the pump. Make sure to notate all connection points for the union on the pump suction piping.
-
Page 69: Controller Tasks
Maintenance Procedures 16. Replace the volute cover with new o-ring and re- 1. Remove all quick-connect black plugs and the one insulate. orange plug (power supply 24 Vac). 17. Re-install pump. Attach the mounting bolts to the frame WARNING using a 1/2 inch wrench or socket. Hazardous Voltage! 18. -
Page 70: Chiller/Heat Pump Troubleshooting
Isolation Fault detection is recognizing that a problem has occurred, Trane manufactures chillers/heat pumps with embedded even if the root cause is not yet known. Fault isolation is the fault detection and diagnostics in each module’s controller... - Page 71 Chiller/Heat Pump Troubleshooting Table 20. MWC interface panel diagnostic code key (continued) Type Alarm Action CoreSense 1 Warning Warning Auto Reset Shuts down compressor 1 CoreSense 1 Fault User Reset Shuts down compressor 1 CoreSense 1 Failure User Reset CoreSense 1 Lockout User Reset Shuts down Circuit 1 Shuts down compressor 1...
- Page 72 Chiller/Heat Pump Troubleshooting Table 20. MWC interface panel diagnostic code key (continued) Type Alarm Action Warning BMS offline Auto Reset System Chilled LWT too high Warning Auto Reset System Hot LWT too low Warning Auto Reset Warning Condenser LWT too low Auto Reset Evaporator LWT too high Warning...
- Page 73 Chiller/Heat Pump Troubleshooting Table 21. WXM interface panel diagnostic code key (continued) Type Alarm Action Control panel heating/cooling control is disabled UI11 sensor failure Auto Reset cpCOe #1 UI1 sensor failure Warning Auto Reset cpCOe #1 UI2 sensor failure Warning Auto Reset cpCOe #1 Offline Alarm Warning...
- Page 74 Chiller/Heat Pump Troubleshooting Table 21. WXM interface panel diagnostic code key (continued) Type Alarm Action Secondary 3 communication lost Warning Auto Reset Secondary 4 communication lost Warning Auto Reset Secondary 5 communication lost Warning Auto Reset Secondary 6 communication lost Warning Auto Reset Secondary 7 communication lost...
-
Page 75: Compressor Diagnostic Codes
Compressor Diagnostic Codes CoreSense™ Flash Codes If equipped, the CoreSense technology in the Copeland Copeland compressors used in Trane chillers/heat pumps compressor will communicate an abnormal system are highly automated with digital capability to record and condition through a unique flash code: report a range of operating parameters and critical events. -
Page 76: Phase Monitor Protection
Chiller/Heat Pump Troubleshooting Table 22. CoreSense™ communications LED flash code information (continued) Code Fault Code Reset Description Trouble Shooting Information Status Fault Condition Description Red Flash Code Future Use Check incoming power. After 5 minutes, missing phase Red Flash Code Missing Phase Missing phase Check fuses/breakers. - Page 77 Chiller/Heat Pump Troubleshooting 1. Symptom: Compressor will not start Possible Causes Potential Solutions Temperature control not in demand Check setpoint. Flow switch open due to low water flow Check flow switch functionality; check flow rate. Low/high pressure event has occurred; obstructed BPHE; check sensor Low pressure, high pressure sensor/switch open functionality.
- Page 78 Chiller/Heat Pump Troubleshooting 5. Symptom: Compressor loses oil Possible Causes Potential Solutions Oil trapped in the system Check operating condition to assure compressor runs inside map. Compressor short cycling Adjust proper control settings for Min. ON/OFF runtime. Check compressor superheat. Superheat at the compressor suction should be Liquid refrigerant approximately 12°...
- Page 79 Chiller/Heat Pump Troubleshooting 9. Symptom: High refrigerant discharge pressure Possible Causes Potential Solutions System overcharged with refrigerant Remove excess refrigerant. Condenser tubes clogged or fouled Reverse flush with appropriate chemical solution. Purge non-condensables. Non-condensables in chiller Improper water flow in condenser Check condenser flow rate.
- Page 80 Chiller/Heat Pump Troubleshooting 14. Symptom: Thermal Expansion valve superheat too high Possible Causes Potential Solutions Low refrigerant charge Recharge refrigerant as per unit nameplate. Defective or improper settings of EXV Reset valve settings to factory specifications. Sensing bulb incorrectly located Check if secured to pipe or insulated;...
-
Page 81: Optional Variable Frequency Drive
Thermafit™ MWC and WXM modulars are optionally provides smooth and efficient operation from 45 Hz to 60 equipped with a Trane TR200 VFD. The lead chiller module Hz for close temperature control. This part load operation or all chiller modules can have a variable speed drive... -
Page 82: Warnings And Alarms
Optional Variable Frequency Drive areas exterior to the frequency converter as indicated in the alarm or warning. Warnings A warning is issued when an alarm condition is impending or when an abnormal operating condition is present and may result in the frequency converter issuing an alarm. A warning clears by itself when the abnormal condition is removed. -
Page 83: Warning And Alarm Displays
Optional Variable Frequency Drive Warning and Alarm Displays An alarm or trip-lock alarm will flash on display along with the alarm number. In addition to the text and alarm code on the frequency converter LCP, there are three status indicator lights. Warning LED Alarm LED Warning... - Page 84 Optional Variable Frequency Drive Table 24. Warning and alarm definitions and troubleshooting Warning/Alarm Description / Probable Cause Troubleshooting The control card voltage is below 10 V from terminal 50. Remove some of the load from terminal 50, as the 10 V supply is overloaded. Remove the wiring from terminal 50.
- Page 85 (ground) fault frequency converter and the motor or in the motor leads and the motor with a megohmmeter. motor itself. Record the value of the following parameters and contact your Trane supplier: • 15-40 FC Type • 15-41 Power Section •...
- Page 86 Check for loose or missing wiring. fault • It may be necessary to contact your Trane supplier or service department. Note the code number for further troubleshooting directions. No feedback from the heatsink temperature sensor. The signal from the IGBT thermal sensor is not available on the power card.
- Page 87 1-86 Trip Speed Low [RPM] (except when starting or stopping) the frequency converter will trip. ALARM 50, AMA Contact your Trane supplier or Trane Service Department calibration failed ALARM 51, AMA The settings for motor voltage, motor current Check the settings in parameters 1-20 to 1-25.
- Page 88 Optional Variable Frequency Drive Table 24. Warning and alarm definitions and troubleshooting (continued) Warning/Alarm Description / Probable Cause Troubleshooting Check the application to determine the cause. Possibly increase the output frequency WARNING 62, The output frequency has reached the value limit.
- Page 89 Optional Variable Frequency Drive Table 24. Warning and alarm definitions and troubleshooting (continued) Warning/Alarm Description / Probable Cause Troubleshooting With a frequency converter operating multi- WARNING 203, motors, an under-load condition was Inspect the system for proper operation. Missing motor detected.
-
Page 90: Request For Initial Start-Up
Trane at As part of a continuous commitment to quality, initial start- least 10 working days prior to the scheduled initial start-up up of this chiller/heat pump by a factory-certified technician date. -
Page 91: Initial Startup Agreement
Request for Initial Start-Up Initial Startup Agreement startup technician. Payment for an aborted startup will be forfeited. Rescheduled initial startups are subject to any additional costs that may have been incurred by the technician. An approved purchase order or payment in By signing this form, you agree the chiller/heat pump is advance will be required to reschedule an aborted initial ready for initial startup. - Page 92 For more information, please visit trane.com or tranetechnologies.com. Trane has a policy of continuous product and product data improvements and reserves the right to change design and specifications without notice. We are committed to using environmentally conscious print practices.