ACS GP20 Guide

<<Insert name of product>><< insert part number>> • << 9/11/2018>> 1
GP SERIES PORTABLE CHILLERS
Part Number: 882.12047.00
Revision: 12/2/2021
OPERATION AND INSTRUCTION MANUAL
GP20, GP30, GP40, GP50, GP70, GP90, GP105, GP140, GP175,
GP210

GP Series Portable Chillers 882.12047.00 • 12/2/2021 ii
Write Down Your Serial Numbers Here For Future Reference:
_________________________ _________________________
_________________________ _________________________
_________________________ _________________________
We are commied to product improvement.
Specicaons, appearance, and dimensions described in this manual are subject to change without
noce.
DCN No. ____________
© Copyright 2023
All rights reserved.

GP Series Portable Chillers 882.12047.00 • 12/2/2021 iii
Shipping Info
Unpacking and Inspection
You should inspect your equipment for possible shipping damage.
Thoroughly check the equipment for any damage that might have occurred in transit, such
as broken or loose wiring and components, loose hardware and mounng screws, etc.
In the Event of Shipping Damage
According to the contract terms and condions of the Carrier, the responsibility of the
Shipper ends at the me and place of shipment.
Nofy the transportaon company’s local agent if you discover damage.
Hold the damaged goods and packing material for the examining agent’s inspecon. Do not
return any goods before the transportaon company’s inspecon and authorizaon.
File a claim with the transportaon company. Substanate the claim by referring to the
agent’s report. A cered copy of our invoice is available upon request. The original Bill of
Lading is aached to our original invoice. If the shipment was prepaid, write us for a
receipted transportaon bill.
Advise customer service regarding your wish for assistance and to obtain an RMA (return
material authorizaon) number.
If the Shipment is Not Complete
Check the packing list as back-ordered items are noted on the packing list. You should have:
Machine
Bill of lading
Packing list
Operang and Installaon packet
Electrical schemac and panel layout drawings
Component instrucon manuals
Re-inspect the container and packing material to see if you missed any smaller items during
unpacking.
If the Shipment is Not Correct
If the shipment is not what you ordered, please contact customer service at 262.641.8600.
Have the order number and item number ready. Hold the items unl you receive shipping
instrucons.

GP Series Portable Chillers 882.12047.00 • 12/2/2021 iv
Returns
Do not return any damaged or incorrect items unl you receive shipping instrucons from
the shipping department.
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.

GP Series Portable Chillers 882.12047.00 • 12/2/2021 v
Table of Contents
CHAPTER 1: SAFETY ............................................................................................................. 7
1-1 How to Use This Manual............................................................................................7
Safety Symbols Used in this Manual......................................................................... 8
General Safety Regulations .................................................................................................9
1-2 Responsibility ............................................................................................................9
CHAPTER 2: FUNCTIONAL DESCRIPTION ...................................................................... 13
2-1 Models Covered in This Manual...............................................................................13
2-2 General Description.................................................................................................13
Refrigeration Circuit ...........................................................................................15
2-3 Standard Features...................................................................................................16
2-4 Safety Devices and Interlocks..................................................................................18
2-5 Optional Features ....................................................................................................20
CHAPTER 3: INSTALLATION .............................................................................................. 22
3-1 Uncrating .................................................................................................................22
3-2 Electrical Connections .............................................................................................22
3-4 Bypass Valve Considerations...................................................................................23
3-5 Galvanic Corrosion Considerations..........................................................................24
3-6 Water Treatment Considerations..............................................................................24
3-7 Condenser Considerations ......................................................................................24
3-8 Water Reservoir.......................................................................................................36
3-10 Automatic Water Make-Up Option............................................................................38
3-11 Initial Start-Up..........................................................................................................39
3-12 Finishing Setup: Setting Up Passwords ...................................................................42
3-13 Electrical Connection...............................................................................................44
3-14 Unit Information .......................................................................................................45
3-15 Cold Weather Installation.........................................................................................47
CHAPTER 4: OPERATION .................................................................................................... 48
4-1 Panel Buttons, Indicator Lights, and Switches .........................................................48

GP Series Portable Chillers 882.12047.00 • 12/2/2021 vi
Microprocessor Controller ..................................................................................48
4-2 Initial Start-up ..........................................................................................................49
4-3 Status Screens ........................................................................................................51
4-4 Controller Setpoints .................................................................................................54
4-5 Configuration Settings .............................................................................................59
4-8 Optional Communications........................................................................................62
CHAPTER 5: MAINTENANCE ............................................................................................. 63
5-1 Lubrication...............................................................................................................63
5-2 Filter Cleaning .........................................................................................................63
5-3 Maintaining the Condenser ......................................................................................63
5-4 Maintaining the Evaporator ......................................................................................64
5-5 Evaporator Process Piping Y-Strainer......................................................................64
5-6 Preventative Maintenance Service...........................................................................64
CHAPTER 6: TROUBLESHOOTING.................................................................................... 66
6-1 Identifying the Cause of a Problem ..........................................................................66
CHAPTER 7: APPENDIX....................................................................................................... 78
7-1 7-1 Customer Satisfaction Warranty Program .......................................................78
7-3 Pumps, Curves, Flow, and Pressure Considerations ...............................................93
7-4 Technical Assistance .................................................................................................101

GP Series Portable Chillers 882.12047.00 • 11/15/2021 7
Chapter 1: Safety
1-1 How to Use This Manual
Use this manual as a guide and reference for installing, operating, and maintaining
your machine. 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
safety 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 machine. 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 machine. These instructions are intended to supplement
standard shop procedures performed at shift, daily, and weekly intervals.
The Operation chapter includes a description of electrical and mechanical controls, in
addition to information for operating the machine 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 machine 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, drawings, schematics, parts lists, and
available options. 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.

GP Series Portable Chillers 882.12047.00 • 11/15/2021 8
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! DANGER indicates an imminently hazardous situaon that, if not avoided,
will result in death or serious injury.
WARNING! WARNING indicates a potenally hazardous situaon or pracce that, if
not avoided, could result in death or serious injury.
Caution! CAUTION indicates a potenally hazardous situaon or pracce that, if not
avoided, may result in minor or moderate injury or in property damage.

GP Series Portable Chillers 882.12047.00 • 11/15/2021 9
General Safety Regulations
These regulaons should be read, understood and periodically reviewed by all personnel
involved in any way with this machine.
Never operate or remove any machine components that are secured by mechanical
fasteners unless the motor is electrically locked out and all moving parts are moonless.
Do not circumvent the safety interlocks.
Extreme care should be taken to see that all bolts are properly ghtened at all mes during
the operaon of the machine.
1-2 Responsibility
These machines are constructed for maximum operator safety when used under standard
operang condions and when recommended instrucons are followed in the maintenance
and operaon of the machine.
All personnel engaged in the use of the machine should become familiar with its operaon
as described in this manual.
Proper operaon of the machine promotes safety for the operator and all workers in its
vicinity.
Become familiar with materials, inspecon, speed limitaons, guard maintenance, and total
user responsibility while using or servicing the equipment.
Each individual must take responsibility for observing the prescribed safety rules as outlined.
All cauon, warning and danger signs must be observed and obeyed. Any actual or potenal
dangerous condions must be reported to your immediate supervisor.

GP Series Portable Chillers 882.12047.00 • 11/15/2021 10
Figure 1: Safety Tags and Warning Labels