FRIULAIR PURESTREAM CHILLERS CWE-Q Series User manual

7425MUM753 Model: CWE-Q - Use and Maintenance Manual Rev. 15
WATER CHILLER
Model: CWE-Q
Use and Maintenance Manual

Editions Record
Code
Revision
Edition
Changes
7425MUM753 15 11/2020
Original instructions: ITALIAN
EN Translation of the original instructions

Dear Customer,
Thank you for the trust you have placed in us. Please read this manual carefully to obtain the
best performance from our product.
In order to avoid incorrect operating conditions and danger for the operators, it is essential
that you follow the instructions meticulously as well as the current accident-prevention laws
in the country of use.
Every chiller/heat pump in the CWE-Q series is tested thoroughly before being packed.
At this stage, checks are made to verify that there are no manufacturing defects and that the
machine performs correctly the functions for which it was designed.
This manual must be kept for future reference and is an integral part of the chiller you
have purchased.
Due to continuous technical development, we reserve the right to make the necessary
modifications without any obligation to give advance notice.
Do not hesitate to contact us if you have any problems or need more information.
The product identification plate, located on the side of the chiller, contains all essential
information about the machine.
You will have to give this data to the manufacturer, or reseller, whenever you request
information, spare parts, etc., during the warranty period.
Removing or tampering with the identification plate will void the warranty.
Warranty conditions:
The warranty is valid for 12 months from the machine being powered-up and no longer than 14
months from the delivery date. Any part which is recognised as being faulty at source shall be
repaired or replaced free of charge. This does not include transport costs, travel, room and board
for technicians. The warranty excludes any liability for direct or indirect damage to persons,
animals and/or property that are caused by incorrect use or inadequate maintenance and is
exclusively limited to manufacturing defects.
Repair under warranty is subject to compliance with the installation, use and maintenance
instructions contained in the "User manual and maintenance."
The warranty is considered void if the product is modified or tampered with in any way. When
making a warranty request, please supply the information available in the product identification
label.

CONTENTS
1SAFETY RULES...................................................................................................... 1
1.1 Definitions of the symbols used ...............................................................................................1
1.2 Warnings ..................................................................................................................................2
1.3 Proper use of the chiller ...........................................................................................................2
1.4 Instructions for using equipment under pressure conforming to PED Directive 2014/68/EU. 3
2OPERATION AND MAIN COMPONENTS............................................................... 4
2.1 Refrigerant circuit .....................................................................................................................4
2.2 Water circuit .............................................................................................................................5
2.3 Fans..........................................................................................................................................5
2.4 Condensation control ...............................................................................................................5
2.5 Control of the water temperature .............................................................................................5
2.6 Protecting the integrity of the machine ....................................................................................5
2.7 CWE-Q units: identification of the main components.............................................................. 6
2.7.1 Version with P3 TANF LSM BR ...............................................................................................6
2.8 Spare parts...............................................................................................................................7
3INSTALLATION....................................................................................................... 8
3.1 Transport ..................................................................................................................................8
3.1.1 Handling the unit with a forklift truck or pallet jack ..................................................................8
3.1.2 Lifting with belts and tubes.......................................................................................................8
3.2 Storage.....................................................................................................................................8
3.3 Place of installation ..................................................................................................................9
3.3.1 Installation spaces....................................................................................................................9
3.4 Water connections..................................................................................................................10
3.4.1 Recommended water system ................................................................................................10
3.4.2 Use of ethylene glycol as a winter anti-freeze.......................................................................11
3.4.3 Charging the water circuit ......................................................................................................11
3.5 Electrical connections ............................................................................................................12
3.5.1 Connecting a remote on/off switch and a remote alarm indicator light.................................12
4PRELIMINARY CHECKS AND START-UP........................................................... 13
4.1 Preliminary checks and preparation for the first start-up.......................................................13
4.2 Start-up...................................................................................................................................13
4.2.1 Start-up under critical conditions ...........................................................................................14
4.3 Turning off the unit .................................................................................................................14
5ELECTRONIC CONTROLLER .............................................................................. 15
5.1 Main functions of the electronic controller buttons and meanings of the icons .................... 15
5.2 Switching on/off......................................................................................................................16
5.3 Controlling water temperature................................................................................................16
5.4 Changing the cooling set point...............................................................................................18
5.5 Changing the heating set point ..............................................................................................18
5.6 Display of inputs and outputs.................................................................................................18
5.7 Alarms ....................................................................................................................................18
5.7.1 Displaying and resetting alarms.............................................................................................19
5.7.2 Table of alarm codes..............................................................................................................20
5.7.3 Displaying alarm history.........................................................................................................20
5.8 Parameters changing.............................................................................................................21
5.9 Setting the date and time .......................................................................................................21
5.10 Low water temperatures (<32°F//0°C)...................................................................................21

6SAFETY DEVICES ................................................................................................ 22
6.1 Calibration of the safety devices and type of rearm ..............................................................22
6.2 Rearming the high-pressure pressure switch........................................................................ 23
7OPERATING LIMITS............................................................................................. 24
7.1 Minimum water flow ...............................................................................................................26
8SEPR - SEASONAL ENERGY PERFORMANCE RATIO...................................... 27
9MAINTENANCE, INSPECTIONS AND PERIODIC CHECKS ................................ 28
10 TROUBLESHOOTING........................................................................................... 29
11 DISMANTLING THE CHILLER.............................................................................. 32
12 WATER DIAGRAMS ............................................................................................. 33
13 REFRIGERANT DIAGRAMS................................................................................. 34
14 DIMENSIONAL DRAWINGS ................................................................................. 35

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7425MUM753 Model: CWE-Q - Use and Maintenance Manual Rev. 15
1
SAFETY RULES
1.1 DEFINITIONS OF THE SYMBOLS USED
Read this use and maintenance manual carefully before perfo
rming any repairs on the
chiller.
Warnings of a general character; risk of danger or possibility of damaging the machine,
pay particular attention to the phrase following this symbol.
Risk of electrical danger; the phrase highlights conditions that could be fatal. Follow the
instructions provided meticulously.
Risk of danger; component or system under pressure.
Risk of danger; component or system that can reach high temperatures during operation.
Risk of danger; it is absolutely forbidde
n to use water to extinguish fires near or on the
chiller.
Risk of danger; it is absolutely forbidden to operate the machine with the panel
open.
Service that can be performed by the machine’s operator, if qualified (1).
Water input connection point.
Water output connection point.
Dispose of each type of material in accordance with the requ
irements of the country of
use.
NOTE
Phrases to be emphasized that do not contain safety rules.

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7425MUM753 Model: CWE-Q - Use and Maintenance Manual Rev. 15
This chiller has been carefully designed and constructed to be environmentally
friendly:
•Refrigerants without CFC;
•Expanded foam insulation without CFC;
•Energy-saving techniques;
•Reduced noise;
•The chiller and its packing materials are recyclable.
In order not to hinder our efforts, the user is required
to obey the simple ecological
warnings indicated by this symbol.
(1) These are persons with the experience, technical preparation and knowledge of
standards and regulations who are qualified to perform the necessary actions and able to
recognize and avoid possible dangers while handling, installing, using and maintaining
the machine.
1.2 WARNINGS
Only qualified persons may use and maintain electrically-powered equipment.
Before commencing maintenance operations ensure no parts of the machine are
live and it cannot be re-connected to the electrical power supply.
These chillers contain R410A refrigerant fluids. Service of the refrigerant circuit must be
performed by specialized personnel using proper tools.
Any modifications to the machine or related operating parameters not previously
verified and authorized by the Manufacturer may be hazardous and
will invalidate
the guarantee.
Do not use water to extinguish fires near or on the chiller.
1.3 PROPER USE OF THE CHILLER
CWE-Q units are monobloc water chillers with air-condensation.
They are intended for use in industrial process or air-conditioning systems requiring chilled
water.
Any other use is considered improper.
The manufacturer is not liable for damage resulting from inappropriate use; in all cases, the
user is liable for any resulting hazards.
Proper use requires conforming to the installation conditions and, in particular:
•Power voltage and frequency;
•Pressure, temperature and flow-capacity of the incoming water;
•Surrounding temperature.
The chiller has been tested and completely assembled. The user must only make the
connections to other systems, as described in the chapters that follow.

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7425MUM753 Model: CWE-Q - Use and Maintenance Manual Rev. 15
1.4 INSTRUCTIONS FOR USING EQUIPMENT UNDER PRESSURE CONFORMING TO
PED DIRECTIVE 2014/68/EU
The proper use of equipment under pressure is an essential prerequisite for ensuring safety.
To this end, the user must proceed as follows:
•Use the equipment within the temperature range outlined in the operating limits on the
manufacturer's plate;
•Do not solder on the exchangers or refrigerant fluid pipes;
•Do not install the equipment in insufficiently ventilated rooms, areas exposed to
sources of heat or near inflammable substances;
•During operation, the equipment must not be subjected to vibrations that could cause
fatigue failures;
•Keep the documentation attached to the equipment (user manual, declaration of
conformity, etc.) for future reference;
•The maximum operating pressure shown on the manufacturer's plate must not be
exceeded. The user is responsible for fitting appropriate safety/control devices.

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7425MUM753 Model: CWE-Q - Use and Maintenance Manual Rev. 15
2
OPERATION AND MAIN COMPONENTS
2.1 REFRIGERANT CIRCUIT
Operation of the CWE-Q chillers is based on a vapour compression cycle implemented within
the chiller circuit and made up of the following components - evaporator, compressor,
condenser and thermostatic expansion valve.
Evaporator: this is a braise-welded plate that exchanges heat between water and a
refrigerant fluid without their coming into contact with each other. It consists of corrugated
stainless steel plates braise-welded to each other with copper or of a copper pipe circuit
where the refrigerant flows, outside of which (in the iron mantle) the water to be cooled is
fluxed. The evaporator is protected against a lack of water by a differential pressure-switch
and against the formation of ice by an anti-freeze system managed by the chiller's electronic
controller.
Compressor: this compresses the vapours coming from the evaporator and sends them to
the condenser at a higher pressure. The CWE-Q series has scroll compressors which are
characterized by low noise and vibration levels. They are protected by thermal magnetic
circuit breakers and a temperature sensor inside the motor windings.
Condenser: heat exchanger with copper pipes and aluminum fins which enables heat
exchange between the refrigerant and the air. It condenses the refrigerant gas by transferring
condensation heat from the refrigerant gas to the air (which flows to the outside). As a result
high pressure liquid refrigerant is produced.
Thermostatic expansion valve: this reduces the pressure of the refrigerant liquid coming
from the condenser and sends it to the evaporator. This valve modulates the flow of
refrigerant in such a way as to maintain the constancy of the superheating of the gas exiting
to the evaporator under its various working conditions and, thus ensures that the flow of gas
entering the compressor contains no liquid.
Thanks to these components, the vapour-compression cycle works as follows: the
refrigerant liquid evaporates in the evaporator, chilling the water; the refrigerant vapours are
then aspirated from the compressor, which compresses them and sends them to the
condenser under high pressure; here, thanks to a flow of forced air from the fans, the high-
pressure refrigerant gas is cooled, making it condensed and undercooled.
The flow of refrigerant liquid then passes through the lamination valve (thermostatic
expansion valve), which drastically reduces its pressure: the refrigerant liquid returns to the
evaporator at a reduced pressure where it again evaporates, taking heat from the water.