Trane Ascend ACS Series Installation, Operation And Maintenance Manual
  1. Manuals
  2. Brands
  3. Trane Manuals
  4. Chiller
  5. Ascend ACS Series
  6. Installation, operation and maintenance manual
Trane Ascend ACS Series Installation, Operation And Maintenance Manual

Trane Ascend ACS Series Installation, Operation And Maintenance Manual

Air-cooled chiller with symbio controls 80 to 230 nominal tons
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Installation, Operation, and Maintenance
Ascend™ Air-Cooled Chiller
Models ACS and ACX
With Symbio™ Controls
80 to 230 Nominal Tons
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.
March 2025
SAFETY WARNING
AC-SVX004C-EN

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Ascend ACS Series and is the answer not in the manual?

Questions and answers

Related Manuals for Trane Ascend ACS Series

Summary of Contents for Trane Ascend ACS Series

  • Page 1 Installation, Operation, and Maintenance Ascend™ Air-Cooled Chiller Models ACS and ACX With Symbio™ Controls 80 to 230 Nominal Tons 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.

  • Page 2: Warnings, Cautions, And Notices

    (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 Updated General data – ACX (I-P) and ACX (SI) tables in General Data chapter. This document and the information in it are the property of Trane, and may not be used or reproduced in whole or in • Updated the A2L chapter.

  • Page 4: Table Of Contents

    Table of Contents Model Number Information ....6 Decommissioning......25 Nameplates.
  • Page 5 Seasonal Unit Start-Up Procedure ..68 Trane Service ......89 System Restart after an Extended Shutdown .

  • Page 6: Model Number Information

    Model Number Information Nameplates Model Number Coding System Model numbers are composed of numbers and letters that Unit nameplates are applied to the exterior of the control represent features of the equipment. Shown below is a panel. A compressor nameplate is located on each sample of typical unit model number.

  • Page 7: Model Number Descriptions

    Digit 10 — Manufacturing Location Digit 23 — Insulation B = BACnet® Interface (MS/TP) p = BACnet Interface (IP) U = Trane Commercial Systems, Pueblo, CO USA N = Standard 0.75 inch M = Modbus™ Interface H = Evaporator-Only 1.25 inch humidity/low evap L = LonTalk®...
  • Page 8 Model Number Descriptions Digit 38 — Unit Isolation X = None 1 = Elastomeric Isolators Digit 39 — Shipping Package X = No Shipping Package F = Shipped with Fork Pocket T = Tarp Covering Full Unit Digit 40 — Pump Package X = No Pump Option 2 = Single Pump, High Pressure, Single VFD 4 = Dual Pump, High Pressure, Dual VFD...

  • Page 9: Compressor Information

    105/485 = 40 tons Digit 7 — Agency Approval A = UL Digit 8 — Voltage 3 = 200–230V/60Hz/3 phase 4 = 460V/60Hz/3 phase 7 = 575V/60Hz/3 phase 9 = 380V–400V/60Hz/3 phase Digit 9, 10 — Custom AT = Trane Pueblo AC-SVX004C-EN...

  • Page 10: General Information

    General Information Unit Description The chiller features Tracer® Symbio 800 controls to monitor the control variables that govern the operation of Ascend™ Model ACS and ACX units are scroll type, air- the chiller unit. Adaptive Control logic can correct these cooled, liquid chillers, designed for installation outdoors.
  • Page 11 General Information Table 1. General data – ACS (IP) (continued) Unit Size (tons) AC Tip speed ft/min 7916 7916 7916 7916 7916 7916 General Unit Refrigerant circuits 21-43- 25-50- 17-33-50- 15-30-50- 14-32-50- 17-33-50- Capacity steps 71-100 75-100 67-83-100 65-80-100 64-82-100 67-83-100 Min ambient - low/wide °F...
  • Page 12 General Information Table 2. General data – ACS (SI) (continued) Unit Size (tons) Diameter EC - Airflow per fan m3/h 19263 19260 19262 19260 19263 19260 AC - Airflow per fan m3/h 19783 19780 19782 19780 19783 19780 EC Motor Power per motor AC Motor Power per motor EC Motor RPM EC Tip speed...
  • Page 13 General Information Table 3. General data – ACX (I-P) (continued) Unit Size (Tons) psig Min. Water Pressure psig Max. Water Pressure Condenser Quantity of coils Coil length 83.6 83.6 83.6 83.6 83.6 83.6 83.6 83.6 83.6 Coil height 49.2 49.2 49.2 49.2 49.2...
  • Page 14 General Information Table 4. General data – ACX (SI) (continued) Unit Size (Tons) Max. Water Temperature °C 65.5 65.5 65.5 65.5 65.5 65.5 65.5 65.5 65.5 Min. Water Pressure Max. Water Pressure 1034.2 1034.2 1034.2 1034.2 1034.2 1034.2 1034.2 1034.2 1034.2 Condenser Quantity of coils...

  • Page 15: Pre-Installation

    Notify the carrier’s terminal of the damage immediately 145 psig at 50°F), call a qualified service organization by phone and by mail. and the appropriate Trane sales office. • Concealed damage must be reported within 15 days. Note: Pressure will be approximately 20 psig if shipped •...

  • Page 16: Installation Requirements

    Ascend™ Air-Cooled Chiller Models ACS and ACX Installation Completion and Request for Trane Service Form (AC- ADF007*-EN) See Log and Check Sheet chapter Trane, or an agent of Trane specifically Chiller Start-up Commissioning authorized to perform start-up of Trane® products AC-SVX004C-EN...

  • Page 17: Dimensions And Weights

    Dimensions and Weights Unit Dimensions Standard Unit ACSA 140 - 230T INLET/OUTLET CONNECTION 4” (100 mm) INLET WATER CONNECTION OUTLET WATER CONNECTION MOUNTING LOCATIONS " INCOMING CUSTOMER LIFTING LOCATIONS (91mm) POWER LOCATION INLET WATER TD7 DISPLAY CONNECTION ENCLOSURE BOX OUTLET WATER CONNECTION "...

  • Page 18: Unit With Optional Water Reversing Valve - No Pump

    Dimensions and Weights Unit with Optional Water Reversing Valve – No Pump OPTION WATER SIDE REVERSING VALVE INLET WATER CONNECTION INLET/OUTLET CONNECTION 4" (100mm) OPTION WATER SIDE REVERSING VALVE OUTLET WATER CONNECTION " MOUNTING LOCATIONS INCOMING CUSTOMER LIFTING LOCATIONS (91mm) POWER LOCATION OPTION WATER SIDE TD7 DISPLAY...

  • Page 19: Units With Pump Package Option

    Dimensions and Weights Units with Pump Package Option INLET/OUTLET CONNECTION 4" (100mm) OUTLET WATER CONNECTION INLET WATER CONNECTION " INCOMING CUSTOMER MOUNTING LOCATIONS LIFTING LOCATIONS (91mm) POWER LOCATION OUTLET WATER CONNECTION TD7 DISPLAY ENCLOSURE BOX INLET WATER CONNECTION " (2499mm) "...

  • Page 20: Units With Partial Heat Recovery

    Dimensions and Weights Units with Partial Heat Recovery Option INLET/OUTLET PHR INLET WATER CONNECTION CONNECTION 4" (100mm) PHR OUTLET WATER CONNECTION INLET WATER CONNECTION OUTLET WATER CONNECTION PHR INLET/OUTLET CONNECTION 2.5"/3" (65mm/80mm) " INCOMING CUSTOMER MOUNTING LOCATIONS LIFTING LOCATIONS (91mm) POWER LOCATION TD7 DISPLAY ENCLOSURE BOX...

  • Page 21: Service Clearance

    Dimensions and Weights Service Clearance Figure 2. Unit service clearance requirements Control 85” (2160mm) Panel See note 3 40” (1016 NO OBSTRUCTIONS ABOVE UNIT 24” (600.1mm) note 1 36” (914.4mm) TOP VIEW Notes: 1. A full 40 inch clearance is required in front of the control panel.

  • Page 22: Weights

    Dimensions and Weights Weights Table 5. Unit weights Options - Additional Weight Standard Unit Unit Size Water Reversing Water Reversing Shipping Operating Pump Package (tons) Valve Only Valve and Pump 7754 3517 7897 3581 2970 1347 7754 3517 7897 3581 2970 1347 9434...

  • Page 23: A2L Work Procedures

    At all times, Trane’s maintenance and service guidelines • Do not puncture refrigerant tubing. shall be followed. If in doubt, contact Trane technical support for assistance. • Dispose of properly in accordance with federal or local regulations.

  • Page 24: Leak Detection

    Verify continuity of earth bonding. 3. Purge the circuit with inert gas. • Replace electrical components with Trane replacement 4. Evacuate (optional for A2L). parts, or those meeting the same ratings and qualified 5. Continuously flush or purge with inert gas when using for flame arrest protection, UL LZGH2 category.

  • Page 25: Refrigerant Charging

    A2L Work Procedures The outlet for the vacuum pump shall not be close to any 1. Become familiar with the equipment and its operation. potential ignition sources, and ventilation shall be available. 2. Isolate system electrically. Before attempting the procedure, ensure that: Refrigerant Charging a.

  • Page 26: Installation - Mechanical

    Once in place, the unit must be level within 1/4- unit, reposition lifting point if unit is not level. inch (6.4 mm) across the length and width of the unit. Trane is not responsible for equipment problems resulting from an improperly designed or constructed foundation.

  • Page 27: Isolation And Sound Emission

    Installation - Mechanical Figure 3. 4–point lift configuration — 80, 100, 120, 140, 160, 180, 200 ton units Lifting Location 3 (Lifting Location 4 located on other side of the unit) Control Lifting Location 1 Panel (Lifting Location 2 located on other side of the unit) Figure 4.

  • Page 28: Mounting Locations, Weights, And Isolators

    Installation - Mechanical Construct an isolated concrete pad for the unit or provide 1. Secure the isolators to the mounting surface using the concrete footings at the unit mounting points. Mount the mounting slots in the isolator base plate. Do not fully unit directly to the concrete pads or footings.

  • Page 29: Point Weights

    Installation - Mechanical Point Weights Table 7. Point weights (lb) - base unit (without pump package and without water reversing valve) Location Unit Size 1329 1410 1170 1369 1329 1410 1170 1369 1645 1832 1365 1717 1645 1832 1365 1717 1710 1934 1562...
  • Page 30 Installation - Mechanical Table 9. Point weights (lb) - unit with pump package Location Unit Size 1317 1277 1283 1487 1289 1322 1336 1554 1317 1277 1283 1487 1289 1322 1336 1554 1663 1696 1481 1897 1403 1548 1351 1742 1663 1696 1481...

  • Page 31: Isolator Selections

    Installation - Mechanical Isolator Selections Table 11. Elastomeric isolator selections - base unit (without pump package and without water reversing valve) Location Unit Size Red 62 Lime 63 Red 62 Lime 63 Brown 61 Brown 61 Brown 61 Brown 61 Red 62 Lime 63 Red 62...

  • Page 32: Evaporator Piping

    • If the water reversing valve assembly is installed, Trane assumes no responsibility for equipment manually operate the valve-hand shank to set the failures which result from untreated or improperly valves to a half-open position, allowing the air to drain treated water, or saline or brackish water.

  • Page 33: Evaporator Piping Components

    Installation - Mechanical Evaporator Piping Components • If desired, install thermometers in the lines to monitor entering and leaving water temperatures. Piping components include all devices and controls used to • Install a balancing valve in the leaving water line to provide proper water system operation and unit operating control water flow balance.

  • Page 34: Entering Chilled Water Piping

    Installation - Mechanical Figure 8. Typical water piping components with water reversing valve WATER LINE INSULATED WATER LINE & ANTIFREEZE PROTECTION FLOW DIRECTION - COOLING / HEATING FLOW DIRECTION - HEATING (OPTION) FT T2 WATER REVERSING VALVE OPTION UNIT CUSTOMER PIPING Description Description Item...

  • Page 35: Evaporator Label

    If the operating conditions on the job site change, the flow switch may need to be replaced. Contact your local Trane Sales office for more information. Indexing Flow Switch...

  • Page 36: Evaporator Head Loss

    25.5 maximum and minimum evaporator flow limits of each Evaporator head loss illustrated in this graph is for water nominal chiller size. applications. Use Trane Select Assist to determine ACS 230 278P evaporator head loss of applications with freeze avoidance solutions.

  • Page 37: Freeze Avoidance

    Installation - Mechanical Freeze Avoidance Note: Ascend™ model ACS chillers use brazed plate heat exchangers which are NOT at risk for refrigerant One or more of the ambient freeze avoidance methods in migration freeze. Chiller must only be protected from the table below must be used to protect the chiller from freeze due to low ambient conditions.

  • Page 38: Low Evaporator Refrigerant Cutout, Percent Glycol Requirements

    The unit efficiency will be reduced and the for proper prediction of unit performance for specific saturated evaporator temperature will be reduced. For operating conditions. For information on specific some operating conditions this effect can be significant. conditions, contact Trane product support. AC-SVX004C-EN...
  • Page 39 Installation - Mechanical Table 15. Low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout (LWTC) — ethlyene glycol Glycol Solution Minimum Minimum Minimum Chilled Water Set Percentage Freeze Point Recommended Recommended LWTC Point (°F) LERTC (°F) (°F) (°F) 32.0 26.0 36.0...
  • Page 40 Installation - Mechanical Table 15. Low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout (LWTC) — ethlyene glycol (continued) Glycol Solution Minimum Minimum Minimum Chilled Water Set Percentage Freeze Point Recommended Recommended LWTC Point (°F) LERTC (°F) (°F) (°F) -10.8 -16.8...
  • Page 41 Installation - Mechanical Table 16. Low evaporator refrigerant temperature cutout (LERTC) and low water temperature cutout (LWTC) — propylene glycol (continued) Glycol Solution Minimum Minimum Minimum Chilled Water Set Percentage Freeze Point Recommended Recommended LWTC Point (°F) LERTC (°F) (°F) (°F) 20.1 14.1...

  • Page 42: Pump Package

    Because the fluid distribution system beyond the chiller is unknown, Trane Select Assist reports Available Head as the head leaving the brazed plate evaporator. Head leaving the evaporator includes the evaporator head loss, pump...
  • Page 43 Installation - Mechanical Figure 13. Pump package unit schematic AC-SVX004C-EN...

  • Page 44: Required

    Pump package available head and NPSHR illustrated in Valve Valve Valve Valve Valve Valve Valve these graphs are for water applications. Use Trane Select Centrifugal pump — Butterfly valve Assist to determine these values for applications with single or dial Single+Co Single Single+w/...
  • Page 45 Installation - Mechanical Figure 15. ACX available head water 100 Figure 16. ACX available head water 120 AC-SVX004C-EN...
  • Page 46 Installation - Mechanical Figure 17. ACS available head water 140 to 160 150.00 130.00 110.00 90.00 70.00 50.00 160.0 210.0 260.0 310.0 360.0 410.0 460.0 510.0 Flow Rate (gpm) Single Pump Twin Pump Figure 18. ACS available head water 180 to 200 160.00 140.00 120.00...
  • Page 47 Installation - Mechanical Figure 19. ACS available head water 215 180.00 160.00 140.00 120.00 100.00 80.00 60.00 250.0 300.0 350.0 400.0 450.0 500.0 550.0 600.0 Flow Rate (gpm) Single Pump Twin Pump Figure 20. ACS available head water 230 175.00 155.00 135.00 115.00...
  • Page 48 50.00 9.29 50.00 11.30 525.20 21.64 525.70 22.49 524.70 75.00 9.47 75.00 11.42 540.40 23.04 550.90 24.15 101.40 9.71 100.80 11.56 575.20 25.9 125.30 9.97 125.10 11.70 599.40 27.8 150.30 10.29 149.40 11.77 Installation - Mechanical 174.60 10.63 175.50 11.86 200.80 11.04 199.80...
  • Page 49 Installation - Mechanical Figure 23. ACS NPSHR water 140 to 160 35.00 30.00 25.00 20.00 15.00 10.00 5.00 160.0 210.0 260.0 310.0 360.0 410.0 460.0 510.0 Flow Rate (gpm) Single Pump Twin Pump Figure 24. ACS NPSHR water 180 to 200 40.00 35.00 30.00...
  • Page 50 Installation - Mechanical Figure 25. ACS NPSHR water 215 30.00 25.00 20.00 15.00 10.00 5.00 250.0 300.0 350.0 400.0 450.0 500.0 550.0 600.0 Flow Rate (gpm) Single Pump Twin Pump Figure 26. ACS NPSHR water 230 40.00 35.00 30.00 25.00 20.00 15.00 10.00...

  • Page 51: Expansion Tank

    Installation - Mechanical Expansion Tank volume equivalent to three (3) minute loop at rated flow. See volume calculation methods in ASHRAE-Handbook- Water piping system shall be equipped with an expansion Equip. 2012, section 13.5. tank, field installed outside of pump package. Expansion tank should be capable of the thermal expansion of a loop Table 19.
  • Page 52 Installation - Mechanical • Braze Plate Heat Exchanger (BPHE): Common for • 2-way Modulating Valve: Factory-installed on the both refrigeration circuits. The BPHE is installed in refrigerant side to manage the leaving water series between the compressor discharge and the air- temperature and the required high discharge pressure.

  • Page 53: Piping Recommendations

    WATER TANK CIRCULATION PUMP MAIN HEATER TRANE SUPPLY FIELD SUPPLY Strainer The circulation pump provides constant water flow rate. Expansion tank and safety valve are necessary for water A strainer (1 to 16 mesh) must be installed in the entering loop operation.

  • Page 54: Freeze Protection

    Failure to follow instructions below could result in specialist to determine what water treatment, if any, is equipment damage. required. Trane assumes no responsibility for If partial heat recovery heat exchanger is drained, equipment failures which result from untreated or heater must be turned off.

  • Page 55: Pressure Drop Curves

    Installation - Mechanical Pressure Drop Curves Figure 30. Water side pressure drop AC-SVX004C-EN...

  • Page 56: Installation Electrical

    Installation Electrical General Recommendations Installer-Supplied Components As you review this manual, keep in mind that: Customer wiring interface connections are shown in the electrical schematics and connection diagrams that are • All field-installed wiring must conform to National shipped with the unit. The installer must provide the Electric Code (NEC) guidelines, and any applicable following components if not ordered with the unit: state and local codes.

  • Page 57: Control Power Supply

    If ambient temperatures below 20°F connections as shown in field wiring diagrams and as (-29°C) are expected, contact your local Trane office. stated on the WARNING label in the starter panel. Proper It is required to provide an independent power source...

  • Page 58: Lead/Lag Dual Pump

    Installation Electrical Table 20. Pump relay operation (continued) Table 21. Alarm and status relay output configurations (continued) Relay Operation Chiller Mode Description Ice Complete Instant Open This output is true whenever there is any active Diagnostics Instant Open latching or non-latching shutdown diagnostic that Alarm Ckt 2 targets Circuit 2, or any of the Compressors on Circuit 2.

  • Page 59: Relay Assignments Using Tracer Tu

    Installation Electrical Table 21. Alarm and status relay output Table 21. Alarm and status relay output configurations (continued) configurations (continued) Description Description This relay output is energized any time either the Free Cooling The output is true (closed) whenever Free Cooling Low Evaporator Water Temperature –...

  • Page 60: Low Voltage Wiring

    Installation Electrical Low Voltage Wiring NOTICE Equipment Damage! Emergency Stop Failure to follow instructions could result in damage Symbio™ 800 provides auxiliary control for a customer to system components. specified/installed latching trip out. When this customer- Freeze inhibitor must be adequate for the leaving furnished remote contact 5S1 is provided, the chiller will water temperature.

  • Page 61: External Demand Limit Setpoint

    Installation Electrical Table 24. Setpoint/signal relationships (continued) Figure 31. Demand limit setpoint via 2–10 VDC signal Input Signal External Water Setpoint min + (max – min) * (Signal – 2) / 8 2 VDC to 10 VDC 10 VDC to 11 VDC >...

  • Page 62: Chilled Water Reset (Cwr)

    Installation Electrical • External demand limit setpoint: IF it is the highest • START RESET is a user adjustable reference priority and it is a valid source THEN use this external • TOD is the outdoor air temperature setpoint for active demand limit setpoint. •...

  • Page 63: Communications Interface

    Installation Electrical loss of communication or sensor failure, the desired CWR Ensemble, Tracer SC+, or a third party building automation will be set to 0. The actual CWR is subject to maximum rate system that supports LonTalk. limits described earlier. BACnet Interface (BCI-C) Communications Interface The BACnet®...

  • Page 64: Operating Principles

    The refrigeration cycle of the ACS or ACX chiller is Partial Heat Recovery conceptually similar to other Trane air-cooled chiller products. The chiller uses a brazed plate evaporator and The partial heat recovery cycle has a supplemental brazed an air-cooled MCHE or RTPF condenser.

  • Page 65: Controls

    Ascend™ chillers utilize the following control/interface upgrades, configuration changes and major service tasks. components: Tracer TU serves as a common interface to all Trane • Symbio™ 800 Controller chillers, and will customize itself based on the properties of •...

  • Page 66: Pre-Start

    Pre-Start Upon completion of installation, complete the Installation Important: Start-up must be performed by Trane or an Completion Check Sheet and Request for Trane Service agent of Trane specifically authorized to checklist in “Log and Check Sheets,” p. perform start-up and warranty of Trane products.

  • Page 67: Start-Up And Shutdown

    Start-Up and Shutdown Important: Initial unit commissioning start-up must be Important: A clear sight glass alone does not mean that performed by Trane or an agent of Trane the system is properly charged. Also check specifically authorized to perform start-up and system subcooling, liquid level control and unit warranty of Trane products.

  • Page 68: Seasonal Unit Start-Up Procedure

    24 leak. In the event that no pressure is present, contact hours before starting. local Trane service. 2. Close all drain valves and re-install the drain plugs in Follow the procedures below to restart the unit after extended shutdown: the evaporator.

  • Page 69: Sequence Of Operation

    S to p C o m m a n d o r D iag n o stic W a itin g to S ta rt to determine what water treatment, if any, is required. Trane assumes no responsibility for equipment failures which result from untreated or improperly Check for treated water, or saline or brackish water.
  • Page 70 Start-Up and Shutdown Figure 34. Sequence of operation: power up diagram Second Trane Logo - Loading User Interface Template... Display Ready Black Screen Grey Screen Loading Data…. First Trane Logo *Display will show either Auto or Stop button as “active”...

  • Page 71: Power Up To Starting

    Start-Up and Shutdown Power Up to Starting • Need to cool (differential to start) already exists • Oil level is detected immediately The following diagram shows the timing from a power up event to energizing the first compressor. The shortest The above conditions would allow for a minimum power up allowable time would be under the following conditions: to starting the first compressor time of about 45 seconds...

  • Page 72: Stopped To Starting

    Start-Up and Shutdown Stopped to Starting • Evaporator Water flow occurs quickly with pump on command The following diagram shows the timing from a stopped • Need to cool (differential to start) already exists mode to energizing the first compressor. The shortest allowable time would be under the following conditions: •...

  • Page 73: Normal Shutdown To Stopped Or Run

    Start-Up and Shutdown Normal Shutdown to Stopped or Run the top attempt to show the final mode if stop is selected via various inputs. Inhibit The following diagram shows the Transition from Running through a Normal (friendly) Shutdown. The dashed lines on Figure 37.

  • Page 74: Maintenance

    Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/ 4. Contact a Trane service organization to leak test the tagout procedures to ensure the power can not be chiller, to check operating and safety controls, and to inadvertently energized.

  • Page 75: Refrigerant And Oil Charge Management

    Evaporator Saturation 41°F 40°F 39°F Important: If oil level is low, contact your local Trane office. Temperature Verify that ONLY Trane OIL00080 is used. Evaporator Approach 3°F 4°F 5°F...

  • Page 76: Condenser Maintenance

    An in-line strainer with a V-shaped sieve is used for units indestructible. When damage or a leak occurs, contact your that do not have factory-installed pump package option. local Trane office. Figure 38. In-line strainer, units without pump Condenser Coil Corrosion Protection...

  • Page 77: Units With Pump Package

    Maintenance loss due to clogging and may be used as a guide to – Remove the plugs at the top and bottom of the determine when cleaning is required. The taps for the casing. pressure gauges are included as standard from the factory. –...

  • Page 78: Diagnostics

    Diagnostics General Diagnostics Information the table below, it will be displayed only as "Informational Warning" as long as no circuit or chiller shutdown results. If Diagnostic Name and Source: Diagnostics may be there is a shutdown and special action defined in the table, shown in the spec with a source of “xy”.
  • Page 79 Diagnostics Table 28. Main processor diagnostics (continued) For systems with no evaporator pump, a single evaporator pump, or a single inverter driving dual evaporator pumps, Immediate or an immediate shutdown shall be performed. For multiple Evaporator Warning and pump systems, detection of a pump fault will generally Chiller NonLatch Remote...
  • Page 80 Diagnostics Table 28. Main processor diagnostics (continued) Ckt Energized High [Ckt Not Compressor Compressor involute pressure differential exceeded Energized or Circuit Immediate Latch Local Pressure allowable limits. Operational Differential Pumpdown] Discharge pressure exceeded the high pressure cutout High Discharge setpoint + 100 kPa. Likely cause: failed or incorrectly set Refrigerant Circuit Immediate...
  • Page 81 Diagnostics Table 28. Main processor diagnostics (continued) Not Enabled (Default): diagnostic is Non-Latching and Warning. Enabled: diagnostic is Latching and Normal Shutdown. The Unit energized leaving evaporator water temp fell below the entering and all ckts’ evaporator water temperature by more than 3°F for 100° reversing valves F-sec.

  • Page 82: Sensor Failure Diagnostic

    Diagnostics Table 28. Main processor diagnostics (continued) The main processor has successfully come out of a reset and built its application. A reset may have been due to a MP: Reset Has power up, installing new software or configuration. This Warning Platform NonLatch...

  • Page 83: Communication Diagnostics

    Diagnostics Table 29. Sensor failure diagnostics Active Modes Diagnostic Reset Affects Target Severity [Inactive Persistence Criteria Name Level Modes] Discharge All [Ckt/Cprsr Pressure Circuit Immediate Latch Bad Sensor or LLID Remote lock out] Transducer Discharge All [Ckt/Cprsr Temperature Circuit Immediate Latch Bad Sensor or LLID Remote...
  • Page 84 Diagnostics Table 30. Communication diagnostics (continued) Comm Loss: Continual loss of communication between the MP and the Compressor Cprsr Immediate Latch Remote Functional ID has occurred for a 35-40 second period. Fault Input Comm Loss: Continual loss of communication between the MP and the Condenser Fan Circuit Normal...
  • Page 85 Diagnostics Table 30. Communication diagnostics (continued) Comm Loss: Evap Water Continual loss of communication between the MP and the Chiller Normal Latch Pump Inverter Functional ID has occurred for a 35-40 second period. Speed Comm Loss: Continual loss of communication between the MP and the Evaporator Chiller Immediate...
  • Page 86 Diagnostics Table 30. Communication diagnostics (continued) Comm Loss: Continual loss of communication between the MP and the Liquid Line Circuit Normal Latch Remote Functional ID has occurred for a 35-40 second period. Temperature Comm Loss: Continual loss of communication between the MP and the Liquid Line Circuit Normal...

  • Page 87: Unit Wiring

    Unit Wiring The following table provides a list of electrical schematics, laminated wiring diagram booklet is also shipped with each field wiring diagrams and connection diagrams. unit. Wiring diagrams can be accessed via e-Library. A Table 31. Wiring diagrams — ACX 80 to 120 ton units Description Document Number Table of Contents, Notes and Fuse Replacement...

  • Page 88: Log And Check Sheets

    Ascend™ Air-Cooled Chiller Model ACS and ACX installation completion verification before Trane start-up is Installation Completion Check Sheet and Request for scheduled, and for reference during the Trane start-up. Trane Service, Form (AC-ADF007*-EN) Where the log or check sheet also exists outside of this •...

  • Page 89: Trane Service

    ☐ Calculate and record freeze point of the solution: __________ Important: Start-up must be performed by Trane or an agent of Trane specifically authorized to ☐ Systems filled perform start-up and warranty of Trane®...
  • Page 90 __________________, we will therefore require ☐ If unit was factory charged (model number digit 16 the presence of Trane service on this site, for the purpose = L), energize heaters for 24 hours prior to start- of start-up and commissioning, by __________________ (date).
  • Page 91 Notes AC-SVX004C-EN...
  • 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.

This manual is also suitable for:

Ascend acx series

Table of Contents