ACS HE Series Mode d’emploi
HE Series Central Chillers
OPERATION AND INSTRUCTION MANUAL
MODELS COVERED:
HECR-20T, HECR-25T, HECR-30T, HECR-40T, HECR-50T,
HECR-60THEWC-20T, HECW-25T, HECW-30T, HECW-40T,
HE
CW
-
50T, HE
CW
-
60T
Part Number:
882.03862.00
Revision: 12/02/2021
HE Series Central Chillers • 882.03862.00 • 12/02/2021 ii
Write Down Your Serial Numbers Here For Future Reference:
_________________________ _________________________
_________________________ _________________________
_________________________ _________________________
We are committed to a continuing program of product improvement.
Specifications, appearance, and dimensions described in this manual are subject to change
without notice.
ECN No. ____________
© Copyright 2023
All rights reserved.
HE Series Central Chillers • 882.03862.00 • 12/02/2021 iii
Technical Assistance
Parts Department
Call toll-free Monday – Friday, 7am–5pm CST [800] 423-3183 or call [262] 641-3950, Fax [262] 641-
8615
The ACS Customer Service Group will provide your company with genuine OEM quality parts
manufactured to engineering design specifications, which will maximize your equipment’s performance
and efficiency. To assist in expediting your phone or fax order, please have the model and serial number
of your unit when you contact us. A customer replacement parts list is included in this manual for your
convenience. ACS welcomes inquiries on all your parts needs and is dedicated to providing excellent
customer service.
Service Department
Call toll-free Monday – Friday, 8am–5pm CST [800] 423-3183 or call [262] 641-3950
Emergencies after 5pm CST, call [847] 439-5655
We have a qualified service department ready to help. Service contracts are available for most
products.
Sales Department
Call [262] 641-3950 Monday–Friday, 8am–5pm CST
Our products are sold by a world-wide network of independent sales representatives. Contact our Sales
Department for the name of the sales representative nearest you.
Contract Department
Call [262] 641-3950 Monday–Friday, 8am–5pm CST
Let us install your system. The Contract Department offers any or all of these services:
project planning; system packages including drawings; equipment, labor, and
construction materials; and union or non-union installations.
Disclaimer:
All rights reserved. No part of the contents of this manual may be reproduced, copied, or
transmitted in any form or by any means including graphic, electronic, or mechanical methods or
photocopying, recording, or information storage and retrieval systems without the written
permission of the publisher, ACS Group, unless it is for the purchaser’s personal use. The
information in this manual is subject to change without notice and does not represent a
commitment on the part of ACS Group. Manufacturer reserves the right to change specifications,
design without notification or obligation.
ACS Group does not assume any responsibility for any errors that may appear in this manual. In
no event will ACS Group be liable for technical or editorial omissions made herein, nor for
direct, indirect, special, incidental, or consequential damages resulting from the use or defect of
this manual. The information in this document is not intended to cover all possible conditions
and situations that might occur. The end user must exercise caution and common sense when
installing, using, or maintaining ACS Group products. ACS Group products should only be
installed by qualified, experienced technicians. If any questions or problems arise, call ACS
Groups customer service at 800-423-3183. Any change to an ACS Group product made during
the installation, start-up, or at any other time must be submitted in writing to ACS Group for
approval and be approved by ACS Group in writing prior to commission. The product warranty
is voided when any unapproved change is made to an ACS Group product.
HE Series Central Chillers • 882.03862.00 • 12/02/2021 iv
Table of Contents
Technical Assistance ...................................................................................................... iii
Chapter 1: Safety ...................................................................................................................... 8
1- 1 How to Use This Manual ......................................................................... 8
1- 2 Safety Symbols Used in this Manual ....................................................... 9
1- 3 Warnings and Precautions .....................................................................10
1- 4 Responsibility .........................................................................................11
Chapter 2: Pre Installation .................................................................................................... 12
2-1 Receiving Inspection ..............................................................................12
Unpacking and Inspection ....................................................................... 12
In the Event of Shipping Damage ........................................................... 12
If the Shipment is Not Complete ............................................................. 12
If the Shipment is Not Correct ................................................................. 12
Returned Material Policy ......................................................................... 13
Warranty Returns .................................................................................... 13
2-2 Unit Storage ...........................................................................................13
2-3 Unit Information ......................................................................................14
Chapter 3: Functional Description ....................................................................................... 16
3-1 Models Covered in This Manual .............................................................16
3-2 General Description ................................................................................16
3-3 Standard Features ..................................................................................17
Mechanical Features ............................................................................... 17
Electrical Features .................................................................................. 17
Refrigeration Features ............................................................................ 17
Controls Features ................................................................................... 18
3-4 Safety Devices and Interlocks ................................................................18
High Pressure Cutout .............................................................................. 18
Pressure Transducers ............................................................................. 19
Flow Switch ............................................................................................. 20
Remote Start/Stop Interlock .................................................................... 20
Remote Setpoint ..................................................................................... 20
3-5 Optional Features ...................................................................................20
General Fault Indicator Audible/Visual Alarm* ........................................ 20
Fluid differential pressure switch* ........................................................... 20
Evaporator flow meter* ........................................................................... 20
UL/cUL Labeled Electrical Subpanel ...................................................... 20
HE Series Central Chillers • 882.03862.00 • 12/02/2021 v
Optional Operating Voltages ................................................................... 20
Chapter 4: Chiller - Installation ............................................................................................ 21
4-1 Uncrating ................................................................................................21
4-2 Chiller Foundation ..................................................................................21
4-3 Chiller Unit Location ...............................................................................21
4-4 Chiller Rigging Instructions .....................................................................21
4-5 Process Water Connections ...................................................................23
4-6 Flow and Pressure Considerations .........................................................24
4-7 Galvanic Corrosion Considerations ........................................................24
4-8 Water Treatment Considerations ............................................................24
4-9 Refrigeration Circuit and Water Condenser Piping .................................25
4-10 Checking Motor Direction .......................................................................26
4-11 Tank Temperature Considerations .........................................................26
4-12 Electrical Connections ............................................................................28
4-13 Initial Set Up ...........................................................................................28
4-14 Ship Loose Items ....................................................................................29
Chapter 5: Remote Air Cooled Condenser – Installation ................................................... 32
5-1 Location .................................................................................................32
5-2 Lifting Remote Condensers ....................................................................34
5-3 Remote Air-Cooled Chiller Condensers ..................................................35
5-4 Interconnecting Refrigerant Piping..........................................................36
5-5 System Configuration .............................................................................36
Remote Air-Cooled Chiller Configurations .....................................................................37
5-6 Sizing Refrigerant Lines .........................................................................39
Liquid Line Sizing .................................................................................... 39
Discharge Line Sizing ............................................................................. 39
5-7 Pressure drop Equivalent Pipe Length (Feet) .........................................39
5-8 Liquid Line Sizing ...................................................................................40
5-9 Discharge Line Sizing .............................................................................41
5-10 Refrigerant Charge Determination ..........................................................42
5-11 Refrigerant Charge Determination ..........................................................42
5-12 Oil Charge Determination .......................................................................43
Chapter 6: General Operation Overview ............................................................................. 44
6-1 HMI Buttons, Indicator Lights, and Switches ...........................................44
6-2 Finishing Setup: Password Protection ....................................................44
6-3 Initial Start-Up /Setting Tank Temperature Setpoint ................................46
HE Series Central Chillers • 882.03862.00 • 12/02/2021 vi
6-4 Chiller Operation ....................................................................................48
Communication Loss Control .................................................................. 48
Compressor Anticycle ............................................................................. 49
Compressors Staging ............................................................................. 49
Hot Gas ................................................................................................... 50
Discharge Pressure Control .................................................................... 51
Electronic Expansion Valve .................................................................... 52
Pump Down............................................................................................. 52
Chiller Control Sensor ............................................................................. 53
Pump Enable........................................................................................... 54
Reduced Fluid Flow Detection ................................................................ 54
Remote Setpoint ..................................................................................... 54
Remote Start ........................................................................................... 54
Runtime Meters ....................................................................................... 55
Save/Restore Settings ............................................................................ 55
6-5 Network Addressing ...............................................................................55
6-6 Alarms .....................................................................................................55
6-7 Optional Communications ......................................................................58
Chapter 7: Step By Step how to Instructions ....................................................................... 59
Changing the Circuit Number on the C.pCO PLC ...................................59
Updating a C.pCO’s Program Using a USB Stick ...................................60
Saving or Restoring Settings to a USB Stick ..........................................61
Updating an Exor HMI Program using a USB Stick ................................62
Downloading Alarm History to a USB Stick .............................................63
Downloading Chiller Logs to a USB Stick ...............................................64
Changing the Exor IP Address ...............................................................65
Chapter 8: Maintenance ........................................................................................................ 66
Lubrication ..............................................................................................66
Maintaining the Condenser .....................................................................66
Remote Air-Cooled Chillers .................................................................... 66
Water-Cooled Chillers ............................................................................. 66
Maintaining the Evaporator .....................................................................66
Evaporator Process Strainer ...................................................................67
Preventative Maintenance Service .........................................................68
Chapter 9: Troubleshooting Alarms ..................................................................................... 69
9-1 Troubleshooting Warnings and Faults from the PLC ..............................70
Chapter 10: Appendix .............................................................................................................. 74
HE Series Central Chillers • 882.03862.00 • 12/02/2021 vii
10-1 Piping Schematic for Water Cooled Chiller .............................................74
10-2 Piping Schematic for Remote Cooled Chiller ..........................................75
10-3 Spare Parts List ......................................................................................77
HE Series Central Chillers • 882.03862.00 • 12/02/2021 8
Chapter 1: Safety
1- 1 How to Use This Manual
Use this manual as a guide and reference for installing, operating, and maintaining your
equipment. The purpose is to assist you in applying efficient, proven techniques that enhance
equipment productivity.
This manual covers only light corrective maintenance. No other maintenance should be
undertaken without first contacting a service engineer.
The Functional Description section outlines models covered, standard features, and optional
features. Additional sections within the manual provide instructions for installation, pre-
operational procedures, operation, preventive maintenance, and corrective maintenance.
The Installation chapter includes required data for receiving, unpacking, inspecting, and
setup of the equipment. We can also provide the assistance of a factory-trained technician to
help train your operator(s) for a nominal charge. This section includes instructions, checks,
and adjustments that should be followed before commencing with operation of the
equipment. These instructions are intended to supplement standard shop procedures
performed at shift, daily, and weekly intervals.
The General Operation chapter includes a description of electrical and mechanical controls,
in addition to information for operating the equipment safely and efficiently.
The Maintenance chapter is intended to serve as a source of detailed assembly and
disassembly instructions for those areas of the equipment requiring service. Preventive
maintenance sections are included to ensure that your equipment provides excellent, long
service.
The Troubleshooting chapter serves as a guide for identification of most common problems.
Potential problems are listed, along with possible causes and related solutions.
The Appendix contains technical specifications, schematics, and parts lists. A spare parts list
with part numbers specific to your machine is provided with your shipping paperwork
package. Refer to this section for a listing of spare parts for purchase. Have your serial
number and model number ready when ordering.
HE Series Central Chillers • 882.03862.00 • 12/02/2021 9
1- 2 Safety Symbols Used in this Manual
The following safety alert symbols are used to alert you to potential personal injury hazards.
Obey all safety messages that follow these symbols to avoid possible injury or death.
DANGER indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING indicates a potentially hazardous situation or practice which, if
not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation or practice which, if
not avoided, may result in minor or moderate injury or in property damage.
HE Series Central Chillers • 882.03862.00 • 12/02/2021 10
1- 3 Warnings and Precautions
Our equipment is designed to provide safe and reliable operation when installed and operated
within design specifications, following national and local safety codes.
To avoid possible personal injury or equipment damage when installing, operating, or
maintaining this equipment, use good judgment and follow these safe practices:
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12
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