LACO Technologies AC0500-ULT-240/3 Operation And Maintenance Manual
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LACO Technologies AC0500-ULT-240/3 Operation And Maintenance Manual

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ASCENT CHILLERS
OPERATIONS AND MAINTENANCE MANUAL

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  • Page 1 ASCENT CHILLERS OPERATIONS AND MAINTENANCE MANUAL...
  • Page 2 Product Group: LACO Technologies Ascent Chillers Manual Rev. Number: A2 (5/28/2024) © 2024 LACO Technologies, Inc. No part of this manual may be reprinted, translated, or duplicated without the expressed written consent of LACO Technologies, Inc 3085 West Directors Row, Salt Lake City, UT 84104 | Phone: 801-486-1004 | info@lacotech.com - www.lacotech.com...

  • Page 3: Table Of Contents

    Pressure Transducers (Only Adjustable by Admin) ......18 Refrigeration Circuit ..................18 Schedule (Only Adjustable by Admin) ............18 Parameters (Only Adjustable by Admin) ..........19 8.3. Modbus ..........................21 Modbus Parameters ..................21 Network Settings (Only adjustable by Admin) ........22 LACO Technologies Ascent Chillers Operations and Maintenance Manual...
  • Page 4 Cleaning and Decontamination ..................25 9.4. Maintenance Schedule ....................26 Troubleshooting ........................28 10.1. Alarms ..........................28 Standard Product Warranty ..................... 30 11.1. Limited Warranty ......................30 11.2. Limitation of Liability ......................30 11.3. Returns ..........................31 11.4. Indemnification ........................31 Ascent Chillers Operations and Maintenance Manual LACO Technologies...
  • Page 5 Table 4 - Chiller Minimum Clearance ....................... 10 Table 5 - Connecting to the Controller ....................15 Table 6 - Modbus Parameters ........................21 Table 7 - Maintenance Schedule ........................ 26 Table 8 - Alarms ..............................28 LACO Technologies Ascent Chillers Operations and Maintenance Manual...
  • Page 6 Figure 10 - AC5000-ECU Chiller ........................9 Figure 11 - Fluid System ..........................12 Figure 12 - Fluid Expansion Bypass Valve ....................12 Figure 13 - Recommended Chiller Plumbing & H20 Filter Diagram ..........14 Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 8: Technical Assistance And/Or Service Contact

    Please contact the manufacturer for replacement parts or service. Ultra-Low Temperature Model Numbers This owner’s manual is to be used for the following LACO Technologies Ascent Chillers: Table 1 - Chiller Model Numbers Type Model Number...

  • Page 9: Cautions And Warnings

    Only connect LACO Technologies Ascent Chillers to a properly grounded circuit. b. Never connect your LACO Technologies Ascent Chillers to voltage that is outside the acceptable voltage range. Connecting your chiller to any voltage outside of these ranges will damage the compressor.

  • Page 10: Table 2 - Chiller Minimum Clearance

    Inlet/Outlet) AC0500-ECU 8. Use Only Approved Fluids - LACO Technologies Ascent Chillers designs every chiller for specific fluids. Only used approved fluids or consult with the manufacture prior to using an alternate fluid. Each chiller is tested prior to shipping and will have some residual fluid in the system.

  • Page 11: Chiller Warning Labels

    WARNING: Adhere to all safety and warning labels. No not remove any of these labels. Removing or opening panels with this warning will expose live electrical circuits. All power should be disconnected from equipment prior to removing or opening these panels. Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 12: Technical Specifications

    All power should be disconnected from equipment prior to removing or opening these panels. CAUTION: Earth (Ground) Protective conductor terminal. Technical Specifications Table 3 - Chiller Technical Specifications Model AC0500-ULT-240/3 AC1000-ULT-240/3 AC2000-ULT-480/3 AC5000-ULT-480/3 AC5000-ECU-480/3 Dry Weight 1110 lbs...

  • Page 13: Chiller Component Overview

    5 CHILLER COMPONENT OVERVIEW Chiller Component Overview Figure 1 - AC1000-ULT Chiller Front Figure 2 - AC1000-ULT Chiller Back Figure 3 - AC1000-ULT Chiller Fluid Section Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 14: Ac2000-Ult

    5 CHILLER COMPONENT OVERVIEW Figure 4 – AC2000-ULT Chiller Front Figure 5 - AC2000-ULT Chiller Back Figure 6 - AC2000-ULT Chiller Fluid Section LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 15: Ac5000-Ult

    5 CHILLER COMPONENT OVERVIEW Figure 7 - AC5000-ULT Chiller Front Figure 8 - AC5000-ULT Chiller Back Figure 9 - AC5000-ULT Chiller Fluid Section Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 16: Ac5000-Ecu

    Place unit on a flat level surface in a well-ventilated area Leave adequate space around chiller for good ventilation and access to panels. See Chiller Spacing figure for minimum clearances. LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 17: Connect To Electrical Service

    Inlet/Outlet) AC0500-ECU WARNING: Do not position equipment in such a way that the main power disconnect is difficult to operate. WARNING: Only a licensed electrician should connect the chiller to electrical service. Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 18: Making Connections To Chiller

    30 minutes prior to turning on the refrigeration circuit. This is only required if the main disconnect has been turned off for 12 hours or more. LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 19: Charging The System With Fluid

    CAUTION: If the system is pressurized, while wearing safety goggles, slowly release the pressure from the system. 3. Open Fluid Expansion Bypass Valve. Figure 12 - Fluid Expansion Bypass Valve 4. Carefully fill the system with fluid. Ascent Chillers Operations and Maintenance Manual LACO Technologies...
  • Page 20 12. While the system is at ambient temperature, verify that the fluid level is between the minimum and maximum fill lines. 13. Adjust desired setpoint and setup is complete. LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 21: Suggested Plumbing Schematic

    6 INSTALLATION AND ASSEMBLY WARNING: Extreme caution must be taken to prevent moisture from entering the system. The system shipped dry from LACO Technologies Ascent Chillers. It is the responsibility of the end user to make sure that there is ABSOLUTELY no moisture in their side of the system. If moisture gets into the process fluid, it must be removed immediately.

  • Page 22: User Interface (Hmi)

    Enter username and password (Default Username: Operator (case sensitive), Default Password: NSC9876chi!! User Interface The main menu can be accessed by pressing the + Icon at the bottom left of the screen. LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 23: Dashboards

    This slider will turn the system on/off. When on the pump will run and the chiller will run to maintain the target setpoint. 8.2.1.2. Setpoint Changing this value will adjust the temperature the chiller will maintain. 8.2.1.3. Temperatures Ascent Chillers Operations and Maintenance Manual LACO Technologies...
  • Page 24 “Reset Reservoir Alarm” button is pressed. When the chiller is first started there will be a Heater Overtemp alarm. The “Heater OT Reset” button will reset this alarm. This pane shows any active alarms. LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 25: Pid Settings (Only Adjustable By Admin)

    Schedule is where you can set the system to auto turn on/off 8.2.5.1. Auto-Run Times Enter the on time for the day you want the chiller to auto-run on and the stop time. Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 26: Parameters (Only Adjustable By Admin)

    Monday at 8:00 AM. You might want the chiller to not run on Memorial Day, so you would type in 05/29/23. Parameters (Only Adjustable by Admin) 8.2.6.1. Suction Accumulator Solenoid This should only be adjusted by qualified service personnel. LACO Technologies Ascent Chillers Operations and Maintenance Manual...
  • Page 27 R508b LP Pressure Cutin (psig) is the pressure that the chiller will turn back on at. This is preset by the factory. R404a Pres/R508b On (psig) controls when the R508b circuit comes on when the R404a circuit is ready to handle the load. Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 28: Modbus

    Heating Power Float R404a Compressor State R508b Compressor State Heater State Phase Monitor R508b Low Pressure Alarm Low Fluid Alarm Pump Error High Temp Alarm Low Temp Alarm Pump High Pressure Alarm LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 29: Network Settings (Only Adjustable By Admin)

    Write Type Address Address Reservoir Low Pressure Alarm Reservoir High Pressure Alarm Heater Overtemperature Alarm Reset Pump Alarm Alarm Resets Reset Reservoir Alarm Reset Overtemp Alarm Network Settings (Only adjustable by Admin) Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 30: Date/Time (Only Adjustable By Admin)

    The main menu can be accessed by pressing the + Icon at the bottom left of the screen, then selecting Utility and then DateTime Config. Type in the time and time zone and press Save. LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 31: Maintenance

    110° F. Verify that the Heater Over-temp alarm shuts down the heater and requires a manual reset at or below the 110°F. Reset the over temperature alarm to its default value of 150° F. Ascent Chillers Operations and Maintenance Manual LACO Technologies...

  • Page 32: Liquid Level Protection

    DO NOT use any decontamination or cleaning agents which could cause a hazard as the result of a reaction with parts of the equipment or material contained within. Consult the manufacturer if there is any doubt LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 33: Maintenance Schedule

    • Check pump pressure (System Operation Test) • Run fluid drying cycle (System Operation Test) • Take fluid sample for testing as needed (System Operation Test) High Stage Replace Contactor Compressor Starts 250,000 Cycles (R404a) Ascent Chillers Operations and Maintenance Manual LACO Technologies...
  • Page 34 Maintenance to Perform Frequency Low Stage Replace Contactor Compressor Starts 250,000 Cycles (R508b) Cooling Solenoid Replace Solenoid SSR Relay 15,000,000 Cycles Heater Replace Heater SSR Contactor 15,000,000 Cycles Pump Replace Pump Contactor 1,000,000 Cycles LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 35: Troubleshooting

    Too much fluid in Each ULT is designed around a system maximum volume of Syltherm. • Add additional expansion Exceeding this volume can tank. result in excessively high pressures in the reservoir. Ascent Chillers Operations and Maintenance Manual LACO Technologies...
  • Page 36 Fluid outlet is not closing. and check suction pressure Temp temperature while trying to maintain -60C. had dropped below the When -60C is achieved the minimum cooling solenoid will start LACO Technologies Ascent Chillers Operations and Maintenance Manual...

  • Page 37: Alarms

    LACO Technologies Ascent Chillers Product or for results of or damages caused to persons or property by the use of the LACO Technologies Ascent Chillers Product. Only the Manufacturer is authorized to make any warranty or representation and the customer may not rely on any other warranty or representation.

  • Page 38: Returns

    LACO Technologies Ascent Chillers product. a. When any LACO Technologies Ascent Chillers Product has been authorized to return for any inspection, or replacement, it must be returned as specified in the Return Merchandise Authorization Form.
  • Page 39 3085 West Directors Row, Salt Lake City, UT 84104 | Phone: 801-486-1004 | info@lacotech.com - www.lacotech.com...

This manual is also suitable for:

Ac1000-ult-240/3Ac2000-ult-480/3Ac5000-ult-480/3Ac5000-ecu-480/3

Table of Contents