CWE CHILLERS
BY FRIULAIR
USER AND MAINTENANCE MANUAL
CWE CHILLERS
Air Coooled Liquid Chillers
Water Chillers/Heat Pumps
Code
Revision
Edition
Changes
7425MUM541
11
04/2018
Editions Record
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/HWE 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 chille r 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 manufact urer, 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:
For 12 months from the commissionin g date, and no more than 14 months from the shipping date, any
parts that were originally defective will be repaired or replaced at no charge. Expenses for transport
and travel, room and board for our technicians are excluded.
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.
The right to service under the warranty is secondary to your faultless observance of the installation,
use and maintenance instructions in this manual.
The warranty will be voided immediately if the chiller is modified or tampered with, even slightly.
When requesting warranty service, you must provide the data on the product 's identification plate.
CONTENTS
1 SAFETY 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
2 OPERATION 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/HWE UNITS: IDENTIFICATION OF THE MAIN COMPONENTS .................................................................... 6
2.7.1 TANF – Non ferrous atmospheric water circuit ............................................................................................ 6
2.7.2 TP P3 - Pressurized water tank with single P3 pump .................................................................................... 6
2.8 SPARE PARTS .......................................................................................................................................... 7
3 INSTALLATION ................................................................................................................. 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 ..................................................................................................................... 11
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
4 PRELIMINARY 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
5 ELECTRONIC 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 ......................................................................................................... 17
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 .................................................................................................................. 18
5.7.2 Table of alarm codes ................................................................................................................................... 19
5.7.3 Displaying alarm history .............................................................................................................................. 19
5.8 PARAMETERS CHANGING ........................................................................................................................ 20
5.9 SETTING THE DATE AND TIME .................................................................................................................. 20
5.10 LOW WATER TEMPERATURES (<32°F//0°C) .............................................................................................. 20
6 SAFETY DEVICES ............................................................................................................. 21
6.1 CALIBRATION OF THE SAFETY DEVICES AND TYPE OF REARM .......................................................................... 21
6.2 REARMING THE HIGH-PRESSURE PRESSURE SWITCH ..................................................................................... 22
7 OPERATING LIMITS ........................................................................................................ 23
7.1 MINIMUM WATER FLOW ........................................................................................................................ 24
8 SEPR - SEASONAL ENERGY PERFORMANCE RATIO According to Commission Regulation (EU)
2016/2281 ....................................................................................................................... 25
9 MAINTENANCE, INSPECTIONS AND PERIODIC CHECKS .................................................... 26
10 TROUBLESHOOTING ....................................................................................................... 27
11 DISMANTLING THE CHILLER ............................................................................................ 30
12 WATER DIAGRAMS ........................................................................................................ 31
13 REFRIGERANT DIAGRAMS .............................................................................................. 34
14 DIMENSIONAL DRAWINGS ............................................................................................. 36
SAFETY RULES
Read this use and maintenance manual carefully before performing 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 forbidden 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 requirements of the country of
use.
NOTE
Phrases to be emphasized that do not contain safety rules.
1.1 DEFINITIONS OF THE SYMBOLS USED
1
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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.
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.
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.
(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
1.3 PROPER USE OF THE CHILLER
CWE/HWE units are monobloc water chillers/heat pumps 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.
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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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 expo sed 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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OPERATION AND MAIN COMPONENTS
2.1 REFRIGERANT CIRCUIT
Operation of the CWE/HWE chillers/heat pumps 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 braze-welded plate exchanger that exchanges heat between water and a
refrigerant fluid without their coming into contact with each other. It consists of corrugated stainless
steel plates braze-welded to each other with copper. 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/HWE 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.
Heat pump operation: In addition to cooling water the heat pump models (HWE) also heat water.
This is made possible via a switchover valve which intercepts the hot high pressure gas produced by
the compressor and sends it to the plate exchanger (which the water flows through). Condensing the
refrigerant heats the water. The flow of condensed refrigerant then passes through the thermal
expansion valve, which reduces the pressure drastically - the reduced pressure liquid refrigerant enters
the finned tube exchanger (which the air flows through) where it can evaporate by drawing heat from
the outside air. The switchover valve intercepts the evaporated refrigerant and sends it for compressor
suction.
De-icing: When the heat pump is operating condensation may freeze on the external finned tube
exchanger (which acts as an evaporator in the heat pump mode) as a result of certain external air
conditions (e.g. high level of humidity). This layer of ice impedes heat exchange and must be
removed, therefore the machine switches operation mode from heat pump to chiller for a few minutes
when appropriate, sending the hot refrigerant to the external finned tube exchanger. The heat from the
hot refrigerant melts the ice. During this de-icing phase the water drained from the exchanger is
collected in the relevant tank and drained out of the machine.
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2.2 WATER CIRCUIT
The water circuit mainly consists of: pump, evaporator, tank , and expansion vessel.
The water flows first into the evaporator, where it is chilled, and then to the tank; afterwards it is
aspirated by the pump, which sends it to the system.
A differential pressure switch on the evaporator checks that the flow of wat er is sufficient and stops
the compressors if the flow-capacity of the water does not ensure the good functioning of the
exchanger.
An automatic vent valve removes any air bubbles in the circuit.
A fine mesh metal filter at the entrance to the evaporator c atches any solid residues that could damage
the evaporator.
Units can be equipped with pumps with different head values (see equipment with pumps P2, P3 or
P5).
A manometer and safety valve complete the unit's water circuit.
2.3 FANS
The fans force air through the condenser’s fins to remove the heat from the condensation of the
refrigerant gas, thus limiting the pressure inside the condenser.
CWE/HWE chillers use external-rotor axial fans with thermal protection inside the motor winding.
2.4 CONDENSATION CONTROL
When the ambient air temperature decreases air flow cooling capacity increases considerably,
lowering the pressure within the condenser. The fans are switched off (or slowed down) to reduce air
flow and prevent the condensation pressure going below the acceptable limits for correct chiller
circuit operation.
The fans are actually managed electronically by the condensation pressure, enabling correct machine
operation even when the external air temperature is very low (see section 8 Operating limits).
2.5 CONTROL OF THE WATER TEMPERATURE
The purpose of the chiller is to maintain the temperature of the water produced within a desired
interval as the load on the system varies; this is handled by an electronic controller and a temperature
probe that turn the compressor on and off appropriately (also see paragraph 6 Temperature
regulation).
2.6 PROTECTING THE INTEGRITY OF THE MACHINE
In addition to controlling the temperature, the electronic controller uses pressure switches, thermostats
and timers to prevent and handle situations that could compromise the integrity of the machine (also
see Chapter 7 Safety Devices).
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2.7 CWE/HWE UNITS: IDENTIFICATION OF THE MAIN COMPONENTS
04 High pressure switch
06 Compressor
08 Condenser
09 Fan
10 Filter
14 Water filter
17 Electronic controller
18 Evaporator
20 Liquid ricever
22 Disconnector switch
23 High pressure manometer
24 Low pressure manometer
31 Safety valve
34 Sight glass
35 Thermostatic valve
37 Pressure transducer
45 Water manometer
46 Four-way valve
47 Vent valve
48 Expansion vessel
61 Power input
68 On/off light
69-B Selector Local/0/Remote
69-A Heat/Cold selector
83 Pressure plug
85 Solenoid valve
90 Pump
91 Tank
94 Water filler
95 Water inlet
96 Water outlet
97 Drain
2.7.1 TANF – Non ferrous atmospheric water circuit
2.7.2 TP P3 - Pressurized water tank with single P3 pump
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2.8 SPARE PARTS
Spare parts list is printed on a dedicated sticker applied inside the chiller. On this sticker each spare
part is identified with its ID Number and related Sp are Part Number. Here below the cross reference
table between ID Number and exploded drawings Ref. With their description and quantity installed
inside chillers.
NOTE To order the suggested spare parts or any other part, it is necessary to quote the data
reported on the identification plate.
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3
Always keep the chiller vertical: turning it upside down can irreparably damage several parts
of the unit.
Handle with care. Violent falls can cause irreparable damage.
The centre of the machine is approximately its centre of gravity. In any case, when handling
the machine with a forklift truck or pallet jack, always check its stabi lity before lifting.
Lock the belts so that they won't slip off during lifting (see figure).
The packing material is recyclable.
Dispose of each type of material in accordance with the requirements in the country
of use.
INSTALLATION
3.1 TRANSPORT
The units are provided with protective corner sections in cardboard and transparent film.
After checking that the packing is undamaged, position the unit near the installation site and unpack
it. The units can be handled using tubes and belts or a forklift truck.
3.1.1 Handling the unit with a forklift truck or pallet jack
3.1.2 Lifting with belts and tubes
Base supports that can accommodate bars to raise the units are provided.
Use steel tubes with a diameter of 1¼” and at least 0,12 in//3 mm thick and long enough to project at
least 9.85÷11,81 in//250÷300 mm from both sides of the machine's profile.
3.2 STORAGE
Protect the machine from bad weather, even if packed.
Always keep the chiller vertical, even when in storage. Turning it upside down can irreparably
damage several parts of the unit.
If not used, the chiller can be stored packed in an enclosed place, free of dust, with a maximum
temperature of 50 °C/122°F and specific humidity of no higher than 90%.
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3.3 PLACE OF INSTALLATION
Attention! If the machine is installed outside, it could find itself at a temperature lower than
32°F//0°C, when stopped; the formation of ice could damage the evaporator. If
you do not intend to drain the machine during the winter, you must add antifreeze to the water circuit (see paragraph 3.4.2 Use of ethylene glycol as a
winter anti-freeze).
The CWE/HWE unit can be installed either inside or outside.
To determine the best place to install the unit, it is important to consider the following aspects:
The dimensions and source of the water pipes;
The location of the electricity;
The solidity of the support surface;
Avoid any obstacles to the flow of the fan which could cause the recirculation of air t o the
condenser;
Avoid the possible reflection of sound waves: (do not install in narrow or tight spaces);
Provide access for maintenance or repair (see paragraph 3.3.1 Installation spaces);
The air temperatures in the area selected for installation (see C hapter 8 Operating Limits).
3.3.1 Installation spaces
To ensure the good functioning of the unit and access for maintenance, you must respect the minimum
installation space shown in the figure in this paragraph.
The exit of air from the fans must not be obstructed.
In any case, avoid all situations in which hot air can circulate between the output of the fans and the
intake of the machine.
The left or right side of the units can be placed against a wall (*).
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3.4 WATER CONNECTIONS
Water input to the
machine
Water exit from the
machine
We recommend an extraordinary cleaning of the mechanical water filter after the machine
has been running for the first week (also see Chapter 9 Maintenance, inspections and
periodic inspections).
With heat pump models it is advisable to collect
the water produced from de-icing by connecting
the condensation collection pipe of the unit to an
appropriate drain.
CWE/HWE models
013 ÷ 026
036 ÷ 068
075 ÷ 140
50 Hz version
1” GAS FM
1½ ” GAS FM
2” VIC
60 Hz version
1” NPT FF
1½ ” NPT FF
2” VIC
Connect the machine to the water pipes following the instructions located near its water fittings (see
figures).
NOTE It is a good rule that the diameters of the arriving and departing pipes be not less than the
water fittings.
Diameters of the in/out water fittings
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3.4.1 Recommended water system
Attention! Never work with an open flame near or inside the unit when making connections
to the water system.
Important! If the machine is stopped during the winter, you must empty the system (or just
the chiller) to avoid frost damage; any water remaining in the pump must be
drained using the screw on the lower part of the pump housing (see figure).
Outside air temperature [°C]
0
-5
-10
-12
-15
-20
Outside air temperature [°F]
32
23
14
10.4 5 -4
Percentage of ethylene glycol [%]
10
15
20
25
30
40
Attention! Maximum concentration of ethylene glycol allowed: 40%.
Pump drain screw
Pump venting screws
The CWE/HWE units can be provided with a pump tank, expansion vessel, safety valve, filter
(standard), and automatic venting valve, however it is advisable to also equip the water circuit with:
A mechanical filter and a check valve upstream from the charging tap;
An air vent at the highest point of the system;
A drain tap in the lowest point of the system;
Manometers and thermometers at the machine’s water input and output to check its
functioning;
Vibration damping joints on the pipes to avoid the transmission of vibration to the system .
In the case of water circuits with considerable capacity, we recommend checking whether it is
necessary to supplement the expansion vessel possibly on the unit with another additional one.
3.4.2 Use of ethylene glycol as a winter anti-freeze
Instead of emptying the system in winter, you can charge the system with a mixture of water and a
suitable percentage of ethylene glycol, chosen as a function of the lowest expected temperature of the
outside air.
Percentages of ethylene glycol recommended as a function of the expected temperature of the outside air
3.4.3 Charging the water circuit
Check that the drain taps are turned off;
Open all the system’s vent valves;
Turn on the system's shut-off devices;
Start filling by slowly turning on the system's water-charging tap;
When water starts coming out of the vent valves, close them and continue charging until the
manometer shows at least 1 bar;
Bleed the pump using the venting screw on the Archimedes screw ;
Check the system level again;
Check for any leaks by looking at the manometer and inspecting the circuit.
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3.5 ELECTRICAL CONNECTIONS
The machine must be connected to the electricity following the electrical diagram and
conforming to the current laws and regulations in the pla ce of installation.
Attention! Never change the internal electrical connections, as the warranty will be
immediately voided.
Important! Screw the wires solidly to the terminal strip of the cut-off switch and lock the
wire with a cable-gland.
Important! Make the cable entering the machine enters the cable-gland from below: this
prevents rain from dripping inside the machine.
Important! The earth connection is mandatory: connect the earth wire to the terminal
provided in the electrical panel.
Consult the electrical diagram.
The voltage, frequency and number of phases must conform to the data shown on the
machine's identification plate;
The power supply voltage must not vary by more than ±10% from its nominal value ;
The frequency must not vary by more than ±1% from its nominal value (±2% for brief
periods);
The imbalance between power phases must be <2%;
Upstream from the electrical panel, install a differential switch (IDn=0,03A) (main power
switch) and slow-blow fuses with the specifications shown on the electrical diagram;
Use wires of the section shown on the electrical diagram.
The ground wire must be longer than the other wires so that it will be the last one to be pulled if the
device holding the cable loosens.
3.5.1 Connecting a remote on/off switch and a remote alarm indicator light
A remote on/off switch can be connected to terminals in the electrical panel: there are 24V between
these two terminals.
To enable a remote switch, move the I/O/REM switch to REM.
An alarm indicator light can be connected to terminals (clean contact) in the electrical panel.
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Attention! Apply voltage to the machine at least t wo hours before start-up to give the
heating elements in the compressor housing time to heat the oil inside.
Our company reserves the right of not recognizing the warranty in case of premature
breaking down of the compressor, if it is established that this operation is not normally
executed by the installer / user of the plant.
PRELIMINARY CHECKS AND START-UP
4.1 PRELIMINARY CHECKS AND PREPARATION FOR THE FIRST START-UP
Before starting up the unit, it is a good idea to do the following:
Check that the water shut-off valves are open;
Check that the pressure shown on the manometer with the pumps stopped is at least 1 bar (for
closed water systems);
Check that the surrounding temperature is in the range for the machine to function (see
Chapter 8 Operating Limits);
Check that the cut-off on the electrical panel of the machine is open (0 position);
Check that the run/stop switch (I/O/REM) in the electrical panel is in the 0 position;
Check that the mains voltage matches the voltage on the machine's identification plate with a
tolerance of ±10%;
Close the main power supply switch;
Close the cut-off switch on the machine's electrical panel (I position).
This puts the machine under voltage without starting it up.
The heating elements limit the quantity of refrigerant dissolved in the oil and prevent the oil from
migrating when the compressors start.
Before start-up, check that the temperature of the lower part of the compressors is at least 50-59°F
[10-15°C] higher than the surrounding temperature.
4.2 START-UP
To proceed to start-up:
1. Move the remote on/off switch (I/O/REM) on the door of the electrical control panel to position 1;
2. Press key for 4 seconds. The led will flash and turn off, the chiller will switch on;
Electronic controller
3. Check that the alarm symbol does not light up on the electronic controller;
Attention! At the first start-up there could be an alarm for an incorrect sequence of the R-S-T
phases, indicated by the initials AC21.
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This safety system prevents the compressor from turning in the wrong direction.
13
In this case, turn on the main power supply switch upstream from the machine
and reverse the two phases immediately downstream from the main switch.
Attention! Never reverse the wires downstream from the main switch on the
electrical panel because doing so risks changing the correct sequence
of other devices, such as, for example, the pump and fans.
Attention! It is important not to turn the unit off using the main power supply switch or the
cut-off on the machine's electrical panel because this would not provide for the
delayed power-off of the pump regarding the power-off of the compressors, with
the risk of damaging the evaporator; in addition, it would prevent the func tioning
of the heating element in the compressor housing.
Repeat the steps from point 1.
4. Check that the pump has started (the pump icon lights up) and check the water pressures upstream
and downstream from the machine on the manometers previously installed ;
5. Wait for the electronic controller to verify that the water flow is constant through the signal from
the differential pressure-switch; if the differential pressure-switch intervenes (alarm code AL03),
vent the system, check that the shut-off taps and the functioning of the pump are turned on;
6. Wait for the compressors to start.
4.2.1 Start-up under critical conditions
The consequence of starting up under critical conditions could be the intervention of the high -pressure
pressure switch (to rearm the high-pressure pressure switch, see paragraph 6.2 Rearming the high-
pressure pressure switch).
To overcome this problem, you will have to reduce the thermal load on the machine by shutting off
some of the uses or, if this is not possible, by reducing the flow of water into the evaporator: partially
close the output tap from the chiller and restart the machine.
Operate the chiller under these conditions until the water temperature gradually returns within
operating limits; then, you can turn on the tap completely.
4.3 TURNING OFF THE UNIT
For turn off the controller, press key for 4 seconds The led will flash and turn on, the chiller will
switch off or move the run/stop I/O/REM switch to the O position (see paragraph 5.2 Switching on/off).
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ELECTRONIC CONTROLLER
Button
Function
On/off button
Exit procedure
Setting setpoint
Access the menu
Down key
Up key
The electronic controller has two 7-segment displays and a series of icons.
It manages:
The functioning of the compressor to ensure that the water produced has a constant temperature;
The prevention of the high-pressure alarm;
The prevention of the low pressure alarm.
5
Electronic controller
Displays:
The state of the unit;
The state of the compressor;
The state of the pump;
The outlet water temperature;
The inlet water temperature;
All digital and analogue inputs and outputs (navigation between parameters).
Displays the following alarms:
Water differential pressure switch;
High-pressure switch;
Low-pressure transducer;
Anti-freeze;
Compressor protection – wrong R-S-T phase sequence;
Pump’s thermal protection;
Pressure and temperature probe failure.
5.1 MAIN FUNCTIONS OF THE ELECTRONIC CONTROLLER BUTTONS AND
MEANINGS OF THE ICONS
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Led/Display
Function
Indicates the state of compressor:
On: compressor ON
Off: compressor OFF
Flashing: setting setpoint mode or compressor protection
Alarm active
Energy saving on
°Celsius unit
°Fahrenheit unit
Indicates the state of the chiller:
On: chiller OFF
Off: chiller ON
5.2 SWITCHING ON/OFF
Connect the device power supply. Press key for 4 seconds. The led will flash and turn off, the
chiller will switch on.
For turn off the controller, press key for 4 seconds The led will flash and turn on, the chiller will
switch off.
5.3 CONTROLLING WATER TEMPERATURE
This is the factory setting for the temperature regulation based on evaporator outlet water temperature.
A parameter set the position of the neutral zone of regulation:
Before or after the setpoint in function of the active mode;
At the setpoint.
For better understand the regulation mode, two steps must be described:
Switch on;
Switch off.
SWITCH-ON:
The compressor is switched on when the temperatu re is out of the neutral zone:
✓ COOLING: Working temperature > Set Point + Neutral zone
✓ HEATING: Working temperature < Set Point - Neutral zone
The compressor is off if the temperature is inside the neutral zone or if:
✓ COOLING: Working temperature < Setpoint
✓ HEATING: T Working temperature > Setpoint
The second compressor is not switched on immediately even if the temperature is still out the neutral
zone, but it will be waited the delay sets.
SWITCH-OFF:
The compressor is switched off when the temperature:
✓ COOLING: Working temperature < Setpoint
✓ HEATING: Working temperature > Setpoint
The compressor is on if the temperature is inside the neutral zone or if:
✓ COOLING: Working temperature > Setpoint + Neutral zone
✓ HEATING: Working temperature < Setpoint - Neutral zone
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Parameters
Description
Factory Setting
SPC1
Cooling setpoint
7°C//44.6°F
SPH1
Heating setpoint
40°C//104°F
PC00
Working temperature probe
1 – outlet water temperature probe
PC14
Neutral zone regulation
5
PC18
Type of neutral zone
0 – separate
To assign a value lower than to 41 °F//5 °C, the minimum set point value must be
changed. To do this contact the manufacturer.
To achieve temperatures that are negative, or near zero, it is necessary to use anti-freeze
(ethylene glycol) in percentages that depend on the desired temperature; it is also
necessary to change the calibration of the anti-freeze thermostat.
The second compressor is not switched off immediately even if the temperature is still out the neutral
zone, but it will be waited the delay sets.
The neutral zone regulation is showed in the following picture.
5.4 CHANGING THE COOLING SET POINT
To change the set point of the outgoing water proceed as follows:
Starting from the main screen press for 4 seconds and use the key to reach
the User menu;
Press , and use the key to reach the SPC1 parameter;
Press to change the value and use or keys to set it;
To confirm press ;
To exit without saving press .
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5.5 CHANGING THE HEATING SET POINT
To reset an alarm, the condition that caused it must no longer exist: for example, if the
low-pressure pressure switch has intervened, the alarm can only be reset when the pressure
has risen beyond the reset value (see paragraph Calibration of the safety devices and type
of rearm). Then, after displaying the alarm, wait for normal conditions to be restored,
press again, hold it down for 5 seconds and the alarm will be reset.
To change the set point of the outgoing water proceed as follows:
Starting from the main screen press for 4 seconds and use the key to reach
the User menu;
Press , and use the key to reach the SPH1 parameter;
Press to change the value and use or keys to set it;
To confirm press ;
To exit without saving press .
5.6 DISPLAY OF INPUTS AND OUTPUTS
It is possible to display the analogue and digital outputs to check the operation of the machine and its
main components.
Starting from the main screen press for 4 seconds and use the key to reach
the Stat menu;
Use or keys to scroll the list of status of main component and I/O;
Press again until you return to the main screen.
5.7 ALARMS
An alarm condition is signaled by the Alarm icon .
Some alarms must be rearmed manually while for others, the rearm is automatic or semi -automatic.
Manual rearm: these alarms must be reset, which can only be done when the alarm condition
no longer exists; only then can the machine resume operation;
Automatic rearm: the alarm is automatically deactivated as soon as the alarm condition
ceases and the machine restarts by itself. However, the signal (Alarm icon) remains on the
display until the alarm code is displayed;
Semi-automatic rearm: semi-automatic alarms behave like automatic alarms; but if the same
semi-automatic alarm occurs 5 times in 90 minutes, that alarm becomes a manual alarm;
therefore to restart the machine, you will have to remove the cause of the alarm and reset it.
5.7.1 Displaying and resetting alarms
The Alarm icon turns on to indicate an alarm.
To display the code of the alarm that intervened:
Press the key;
Press at Alarm menu;
Use or keys to scroll the list of active alarms;
Press again until you return to the main screen.
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5.7.2 Table of alarm codes
Code
Alarm description
Type of rearm
AL01
Water low temperature
Semiautomatic
AL02
Water high temperature
Semiautomatic
AL03
Water differential pressure switch
Manual
AL04
High pressure from pressure switch
Manual
AL06
High pressure from pressure transducer
Automatic
AL07
Low pressure from pressure transducer
Semiautomatic
AL09
Antifreeze
Manual
AL10
Level switch
Manual
AC21
Thermal protection compressor
Manual
AC25
Thermal protection fans
Manual
AC26
Thermal protection pump 1 (optional)
Manual
AC27
Thermal protection pump 2 (optional)
Manual
AL11
High temperature refrigerant discharge
Automatic
AL13
Working limit
Automatic
AL14
Defrost
Automatic
AC01
Compressor working hours limit
Automatic
AP01
Pump 1 working hours limit (optional)
Automatic
AP02
Pump 2 working hours limit (optional)
Automatic
AF01
Fans working hours limit
Automatic
ES01
Inlet water temperature probe
Automatic
ES02
Ambient temperature probe
Automatic
ES03
Outlet water temperature probe
Automatic
ES11
Discharge temperature probe
Automatic
ES12
Suction temperature probe
Automatic
ES15
Auxiliary probe 1
Automatic
ES16
Auxiliary probe 2
Automatic
AL15
I/O configuration alarm
Automatic
5.7.3 Displaying alarm history
To display the alarm history:
Press the key;
Press at Hi St menu;
Use or keys to scroll the list of alarms;
Press again until you return to the main screen.
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5.8 PARAMETERS CHANGING
1
If it was not anticipated that the chiller unit offered was to produce water at temperatures
close to 0°C//32°F, or below, you should contact our company.
To achieve temperatures that are negative, or near zero, it is necessary to use anti -freeze
(ethylene glycol) in percentages that depend on the desired temperature; it is also necessary
to change the calibration of safety devices.
CWE/HWE units can operate with water and ethylene glycol mixtures up to a concentration
of 40%.
1
NOTE The parameters setting can only be changed at a higher level of programming of the
electronic control: please request the password by contacting our company.
After contact our company, follow this procedure:
Starting from the main screen press for 4 seconds;
Use the key to reach the User menu;
Use or keys to scroll the list;
Press to reach the label PDd1;
Then press and insert using or keys the password
;
Press to confirm;
The complete list of parameter will be available for change;
Press to return to the main screen.
5.9 SETTING THE DATE AND TIME
Follow this procedure:
Starting from the main screen press for 4 seconds;
Use the key to reach the rtc menu;
Press and using or keys insert the date;
Press to confirm;
Press to return to the main screen.
5.10 LOW WATER TEMPERATURES (<32°F//0°C)
NOTE The safety devices setting can only be changed at a higher level of programming of the
electronic control: please request the password by contacting our company.
Contact our company.
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6
Dangerous situation
Safety device
Location
High condensing pressure
High pressure switch
Compressor discharge pipe
High condensing pressure
High pressure prevention system
Electronic controller
Low evaporation pressure
Low pressure transducer
Compressor suction pipe
Low evaporation pressure
Low pressure prevention system
Electronic controller
Low water flow-capacity
Water differential pressure
switch
Plate heat exchanger
Low water temperature
Anti-freeze thermostat
Water exit from the plate heat
exchanger
High water pressure
Safety valve (optional)
Water tank (optional)
Frequent compressor startups
Anti-circulation timer
Electronic controller
Low water level in the tank
Water level sensor (optional)
Water tank (optional)
For some safety devices, once the cause of the alarm times out, the machine resumes
operation automatically as soon as the reset value is reached. Others must be manually reset
to restart the machine (also see paragraph 5.11 Alarms).
Safety device
Intervention value
Reset value
Type of rearm
High pressure switch
41,5 barg // 602 psi
33 barg // 478 psi
Manual
Low pressure transducer
5,8 barg // 84 psi
6,8 barg // 99 psi
Semiautomatic
High pressure prevention*
40 barg // 580 psi
38 barg // 551 psi
Automatic
Low pressure prevention*
6,8 barg // 99 psi
7,8 barg // 113 psi
Automatic
Water differential pressure switch
85 mbar // 1,24 psi
105 mbar // 1,53 psi
Manual
Anti-freeze thermostat
4°C // 39,2°F
8°C // 46,4°F
Semiautomatic
Water safety valve
6 barg // 87 psi
---
---
Anti-circulation timer**
5 min.
---
---
SAFETY DEVICES
CWE/HWE chillers/heat pumps have a series of safety devices that limit the machine's temperature
and pressure values to ensure that it operates within the anticipated limits and to avo id dangerous
situations.
Here is a list of dangerous situations, including the relative safety device and its location.
When the safety devices reach their setting value, most of them trigger an alarm managed by the
electronic controller.
The following paragraph lists the characteristics of each safety device.
6.1 CALIBRATION OF THE SAFETY DEVICES AND TYPE OF REARM
* Only active on units with more than one compressor: consists in reducing the number of
functioning compressors to 1 until the condensation pressure falls below the reset value again .
** This is a function of the electronic controller that prevents the compressor from stopping and
starting too frequently: at least 5 minutes must elapse between the compressor’s power up and the
next.
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6.2 REARMING THE HIGH-PRESSURE PRESSURE SWITCH
Caution! The high pressure gauge stops the compressor whereas the condenser fans
continue to operate to lower their internal pressure.
The intervention of the high-pressure pressure switch is the only case in which, in addition to
manually rearming the electronic controller, it is also necessary to reset th e pressure switch itself.
The high-pressure pressure switch is located in the compressor compartment on the uninsulated
copper pipe that goes from the compressors to the condensing coils; there is a manual-rearm button on
top of it. This can only be rearmed when the pressure in the circuit has fallen below the reset value
(see table “Calibration of the safety devices and type of rearm” in paragraph 7.1).
2 – Safety valve
14 – High pressure switch
1 – Pressure transducer
For this reason, when dealing with an intervention of the high-pressure switch, it is necessary to:
A) Identify the cause of the rise in pressure (fans not working, condensing coil dirty or
obstructed, obstacles to the flow of exiting air, operating temperature outside operating limits,
etc. – also see Chapter 10 Troubleshooting) and remove the cause, if possible;
B) Wait until the high-pressure gauge falls below the reset value (see the tabl e “Calibration of
the safety devices and type of rearm” in paragraph 6.1);
C) Rearm the pressure switch by pressing the red button: if you do not hear a click, it is not
rearmed.
D) Then, rearm the electronic controller: follow the procedure as described in paragraph 5.7.1
Displaying and resetting alarms.
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7
Condensing control mandatory (CL option) – contact our company
Attention! The dotted line indicates the need to use an ethylene glycol mixture and set
adequate parameters in the electronic controller (see paragraph 5.10 Low water
temperatures (<32°F//0°C)).
OPERATING LIMITS
CWE/HWE series units feature broad operating limits in relation to the temperature of the outside air,
thanks to the condensation control (also see paragraph 2.4); they are also prepared to produce water at
low temperature: in this case, it is necessary to contact our company (see paragraph 5.10 Low water
temperatures (<32°F/0°C)).
The graphs show the continuous operating limits of CWE/HWE units in relation to the temperature of
the water exiting the machine and the temperature of the outside air.
CHILLER
Ethylene glycol mandatory – contact our company
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It is recommended to grant a minimum water flow to the chiller in order to avoid serious
damages to the evaporator and to the whole machine (see following table).
Model CWE/HWE
013
021
026
036
041
046
053
068
075
085
100
110
125
140
Minimum water flow [gal/min]
3,12
4,77
4,77
7,33
9,35
9,35
9,5
13,2
16,87
17,6
20,9
23,1
26,03
29,33
Minimum water flow [m3/h]
0,85
1,3
1,3
2
2,55
2,55
2,9
3,6
4,3
4,8
5,7
6,3
7,1
8
Check that water temperature difference between inlet and outlet of the chiller is less than
14.4°F/8°C; higher values could be the symptom of an insufficient water flow.
HEAT PUMP
7.1 MINIMUM WATER FLOW
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8
400V/3Ph/50Hz
Model CWE
013
021
026
036
041
046
053
068
SEPR
4,38
4,38
4,37
4,48
4,38
4,48
4,43
4,97
400V/3Ph/50Hz
Model CWE
075
085
10
110
125
140
SEPR
4,98
4,77
4,89
4,99
4,89
5,14
400V/3Ph/50Hz
Model CWE
076
086
111
126
141
SEPR
4,61
4,7
4,92
4,79
5,04
SEPR - SEASONAL ENERGY PERFORMANCE RATIO
ACCORDING TO COMMISSION REGULATION (EU) 2016/2281
Data reported here below are in accordance with European Regulation (EU) 2016/2281 for eco-design
requirements of cooling products and high temperature process chillers.
Only for units at 50Hz power supply.
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MAINTENANCE, INSPECTIONS AND PERIODIC CHECKS
To keep the machine running properly and providing the guaranteed performance required, it
is necessary to make some periodic checks.
Operation
Frequency
Execution
Check that the temperature of the water produced is in the
required interval
Daily
User
Check for the presence of any alarm signals
Daily
Check the functioning of the fans
Monthly
Check the pressure of the water circuit with the pump stopped
(verify that it is about 1 bar)
Monthly
Check that the temperature of the air is compatible with the
operating limits of the machine
Monthly
Clean the air filters
Monthly
(1)
Clean the condensing coil with a jet of compressed air
Yearly
(1)
Clean the water filter
Monthly
(2)
Specialised
personnel
Check that the refrigerant liquid sight glass is clear or, at most,
with a few bubbles (check with the compressor running)
Every 6 months
Check that the undercooling and overheating values are,
respectively between 3 and 5 K and 5 and 7 K
Every 6 months
Check for traces of oil on the pipes of the refrigerant circuit
(symptom of refrigerant leaks)
Every 6 months
Check the tightness of the electrical terminals both inside the
electrical panel and on the compressors terminals.
Yearly
Check the contacts of the contactors; if they show signs of
deterioration, replace them
Yearly
Check that the current absorbed by the machine is within the
values on the identification plate
Every 6 months
If the unit will not be used for a long time, drain the water from the
plumbings and the machine to avoid the formation of ice during
the winter
(3)
Extraordinary
User
Attention! Before carrying out any maintenance on the unit or accessing internal parts, make
sure you have cut-off the electricity.
Attention! The upper part of the compressor housing and the discharge pipe are hot. Be
especially careful when working near them.
9
(1) It may be necessary to carry this out more frequently in the case of particularly dirty environments.
(2) We recommend an extraordinary cleaning of the filter after the machine has been operating for t he first
week.
(3) It is not necessary to do this if the system has been charged with an anti -freeze solution (water and a
suitable percentage of glycol) (see paragraph 3.4.2 Use of ethylene glycol as a winter anti -freeze).
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TROUBLESHOOTING
Cause
Alarm signal or
symptom
Solution
Execution
1. The unit does not start
Contacts of the main differential switch
open.
Electronic controller off
Close the contacts
User
Unit's electrical panel cut-off switch
open.
Electronic controller off
Close the contacts
User
I/O/REM switch in the O or REM
position
Electronic controller on
Move the switch to I
User
No consent from the water differential
switch
AL03
Evaporator flow switch alarm
Check the functioning of the
pump, vent the plumbings
User
Compressor timer active
The compressor icon on
the display of the
electronic controller is
flashing
Wait 3 minutes
User
No consent from the service
thermostat
Plant water at
temperature (see
display A)
Apply a thermal load to the
machine or lower the set point
User
No consent from the anti-freeze
thermostat
AL09
Evaporator ice alarm
Reset a temperature of the water
(set point) compatible with the
calibration of the anti-freeze
thermostat (see table in
paragraph 6.2)
User
Service and anti-freeze probe
defective
ES03
Alr. Probe Tout evaporator
Check contacts and replace, if
necessary
Specialised
personnel
Entering water temperature probe
defective
ES01
Alr. Probe Tin evaporator
Check contacts and replace, if
necessary
Specialised
personnel
Intervention of the main differential
switch
Electronic controller off
Look for current dispersion
inside the machine
Specialised
personnel
2. The compressor doesn't start
Intervention of the thermal protection
inside the compressor
The contactor of the
compressor is on but
the compressor is
stopped
Wait for cooling: check that the
compressor is working under
normal conditions.
Check for insufficient refrigerant in
the circuit (see point 8).
Specialised
personnel
Contactor of the compressor open
The compressor icon is
on but the compressor
is stopped
Check the voltage at the coil of
the contactor of the compressor
and the continuity of the coil itself
Specialised
personnel
Intervention of the phase-sequence
relay
AC21
Compressors thermal
protection and/or reverse
phase sequence
Reverse the two phases upstream
from the cut-off switch of the unit's
electrical panel (see paragraph
4.2)
Specialised
personnel
10
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Cause
Alarm signal or
symptom
Solution
Execution
2. (continue) The compressor doesn’t start
Magnetothermic protection of the
compressors open (QC1, QC2)
AC21
Compressors thermal
protection and/or reverse
phase sequence
Look for short circuits in the motor
windings of the compressor.
Check for possible overabsorption of current due to too
low voltage; combined with
operating conditions near the
limits: check the power supply
voltage and operating conditions
Specialised
personnel
3. Intervention of the high pressure switch
Condenser obstructed or insufficient
air flow-capacity
AL04
High pressure alarm
Remove dirt from the condenser
and any obstacles to the flow of
air. Wait for the refrigerant
pressure to drop below the reset
value (33 bar g), then rearm the
high-pressure switch by pressing
the button on top of it (see figure
in paragraph 7.2)
User
The unit has operated outside its
operating limits (such as air or water
too hot)
AL04
High pressure alarm
If possible, restore conditions that
are compatible with the operating
limits. Rearm the pressure switch
(paragraph 7.2).
User
Fan not working
AL04
High pressure alarm
See point 6
Excessive refrigerant charge
High subcooling
(greater than
18°F//10K)
Drain excess refrigerant
Specialised
personnel
Presence of incondensable gas or air
in the refrigerant circuit
Presence of bubbles on
the refrigerant sight glass,
also with subcooling values
greater than 9°F//5 K
Drain the refrigerant circuit,
create vacuum and recharge
Specialised
personnel
Refrigerant filter clogged or
thermostatic valve stuck
Pipe downstream from
the component covered
with frost.
Check and replace.
Specialised
personnel
Water pump blocked or defective
(only for heat pump operation)
AL04
High pressure alarm
Unlock or replace the pump
Specialised
personnel
4. Intervention of the water differential pressure switch
Taps of the machine are turned closed
AL03
Evap. Flow switch alarm
Open the taps
User
Water circulation pump blocked or
defective
AL03
Evap. Flow switch alarm
Unlock or replace the pump
Specialised
personnel
Water pump stopped
AL03
Evap. Flow switch alarm
Pump icon lit.
Check the voltage at the coil of
the contactors of the pump and
the continuity of the coil itself
Specialised
personnel
5. Intervention of the low pressure transducer
Refrigerant filter clogged or
thermostatic valve stuck
Pipe downstream from
the component covered
with frost.
Check and replace
Specialised
personnel
Insufficient refrigerant charge
AL07
Low pressure alarm
See point 8
Finned coil dirty or obstructed - air flow
too low (only for heat pump operation)
Clean the finned coil and remove
anything obstructing air flow
User
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Cause
Alarm signal or
symptom
Solution
Execution
6. Fans don't start
Very low outside air temperatures and
consequent intervention of the
condensation control
Fan icon off.
Condensation pressure
normal
The machine is working
anyway
No voltage output from the fan-speed
regulator
Fan icon on and fans
stopped
Check the voltage output from the
regulator and replace, if
necessary
Specialised
personnel
Intervention of the thermal protection
inside the fan
AC25
Fans thermal protection
Check that the working conditions
of the machine (outside air
temperature) are compatible with
the operating limits. Wait for the
fan motor to cool.
User
Fan fuse blown.
Fan icon on and fans
stopped
Look for short circuits in the motor
windings of the fans.
Check the fan roller bearings.
Specialised
personnel
Electrical connections of the fans
loose
Fan icon on and fans
stopped
Check and tighten
Specialised
personnel
7. The unit is working without ever stopping
Excessive thermal load.
Reduce the thermal load.
Reduce the temperature of
the incoming water and/or the
flow-capacity of the water by
closing the exit tap of the unit
a little.
User
No refrigerant.
See point 8
8. Compressor suction pipe covered with frost
No refrigerant.
High superheating, low
subcooling and high
discharge temperature
of the compressor.
Traces of oil on the
refrigerant circuit.
Check the refrigerant circuit
with a leak detector.
Repair any ruptures and
recharge the circuit.
Specialised
personnel
9. The pump doesn't start magnetothermic protection of the pump open
Excessive water flow-capacity; the
pump is absorbing too much current.
AP26, AP27
Pump 1, 2 thermal protection
alarm
Reduce the flow-capacity of the
water by closing the output tap of
the pump a little bit.
Rearm the thermomagnetic
protection of pump QP1.
User
Short circuit or overcurrent.
AP26, AP27
Pump 1, 2 thermal protection
alarm
Look for a short circuit in the
winding of the pump motor.
Check for possible overabsorption of current due to too
low voltage; check the power
supply voltage.
Specialised
personnel
10. The unit starts and stops alternatively;
The outlet water temperature varies greatly
Low water flow
Verify the water flow.
Open the water shut-off valves of
the plant.
If it is possible, reduce the
pressure drop of the water circuit.
If it is possible, add a pump with
proper available pressure.
Specialised
personnel
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DISMANTLING THE CHILLER
If the chiller is being dismantled, you must separate it into parts of homogeneous material.
The following table lists the main materials of the various components of the machine.
Part
Material
Refrigerant fluid
R410A, Oil
Panelling and supports
Carbon steel, epoxy paint
Chiller compressor
Steel, Copper, Aluminium, Oil
Plate exchanger (evaporator)
Steel, Copper
Condenser
Aluminium, Carbon Steel
Pipe
Copper
Fan
Aluminium, Copper, Steel
Valve
Steel, Bronze
Insulation
Synthetic rubber without CFC, EPS, Polyurethane
Electrical wires
Copper, PVC
Electrical parts
PVC, Copper, Bronze
Dispose of refrigerant properly. Remove it from the chiller with suitable tools and
deliver it to authorised collection centres that will treat it and make it reusable.
We recommend that you follow current safety norms for the disposal of each single material.
The refrigerant contains particles of lubrication oil from the chiller compressor.
11
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WATER DIAGRAMS
12
LEGEND
STANDARD
SINGLE PUMP WITH TANK – P2/P3/P5 + TP/TPI
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DUBLE PUMP WITH TANK – D2/D3/D5 + TP/TPI
SINGLE PUMP NO TANK – P2/P3/P5
DOUBLE PUMP NO TANK – D2/D3/D5
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SINGLE PUMP WITH TANK – P2/P3/P5 + TANF
DUBLE PUMP WITH TANK – D2/D3/D5 + TANF
DISCONNECTOR TANK WITH PUMP – X2/X3/X5
33
7425MUM541 Model: CWE/HWE - Use and Maintenance Manual Rev. 11
REFRIGERANT DIAGRAMS
Key
CWE 013÷068 CWE 075÷140
13
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34
HWE 013÷068
HWE 075÷140
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DIMENSIONAL DRAWINGS
Models
CWE/HWE
A B C D E F G
IN
OUT
DRAIN
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
013-021-026
1456
685
23
1455
121
58
189
1” FM
1” FM
1” FM
036-041-046-
053-068
1600
922
19
1890
151
68
200
1”1/2 FM
1”1/2 FM
1” FM
Models
CWE/HWE
A B C D E F G
IN
OUT
DRAIN
[in]
[in]
[in]
[in]
[in]
[in]
[in]
013-021-026
58,22
26,97
0,92
57,29
4,76
2,29
7,42
1” FM
1” FM
1” FM
036-041-046-
053-068
63,57
36,31
0,73
74,43
5,94
2,69
7,83
1”1/2 FM
1”1/2 FM
1” FM
Models
CWE/HWE
A B C D E F G
H
IN
OUT
DRAIN
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
[mm]
075-076-085-086-
100-110-111
1955
1376
45
2588
550
238
628
466
2" VIC
2" VIC
1” FM
125-126-140-141
1956
1376
45
3088
550
238
628
369
2" VIC
2" VIC
1” FM
Models
CWE/HWE
A B C D E F G
H
IN
OUT
DRAIN
[in]
[in]
[in]
[in]
[in]
[in]
[in]
[in]
075-076-085-086-
100-110-111
76,98
54,17
1,85
101,89
21,65
9,37
24,73
14,53
2" VIC
2" VIC
1” FM
125-126-140-141
76,97
54,17
2,01
121,57
21,65
9,37
24,73
14,53
2" VIC
2" VIC
1” FM
14
7425MUM541 Model: CWE/HWE - Use and Maintenance Manual Rev. 11
36
CWE CHILLERS
BY FRIULAIR
.......................................................................................................................................................................................................................
CAG Cooling Solutions
3770B Laird Road, unit 3 Mississauga Ontario, L5L 0A7 Tel: 800-951-0777 Fax: 905-820-3490
Info: chillers@cagcooling.com www.cagcooling.com
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