Daikin EWLQ014KCW1N User manual

EWLQ014KCW1N
EWLQ025KCW1N
EWLQ033KCW1N
EWLQ049KCW1N
EWLQ064KCW1N
REV
00
Date
01/2022
Supersedes
/
Installation, Operation and Maintenance Manual
D-EIMHP01601-22_00EN
CONDENSERLESS WATER-COOLED WATER CHILLERS

D-EIMHP01601-22_00EN 2/25
Index
1. INTRODUCTION...................................................................................................................................................4
1.1 Options and features (1).............................................................................................................................5
1.2 Features .......................................................................................................................................................5
2OPERATION RANGE...........................................................................................................................................6
3SELECTION OF LOCATION................................................................................................................................7
4MAIN COMPONENTS ..........................................................................................................................................7
5INSPECTING AND HANDLING THE UNIT..........................................................................................................8
6UNPACKING AND PLACING THE UNIT.............................................................................................................8
7IMPORTANT INFORMATION REGARDING THE REFRIGERANT USED.........................................................8
8SELECTION OF PIPING MATERIAL...................................................................................................................9
9CONNECTING THE REFRIGERANT CIRCUIT...................................................................................................9
9.1 Precautions when handling piping ...........................................................................................................9
9.2 Connecting the refrigerant circuit...........................................................................................................10
9.3 Leak test and vacuum drying...................................................................................................................11
9.4 Open the discharge- and liquid stop valves...........................................................................................11
9.5 Next perform a fine-tuning .......................................................................................................................12
10 CHECKING THE WATER CIRCUIT...................................................................................................................13
10.1 Connecting the water circuit....................................................................................................................14
10.2 Water charge, flow and quality ................................................................................................................15
10.3 Water piping insulation ............................................................................................................................15
10.4 Refrigerant piping insulation...................................................................................................................15
10.5 Antifreeze protection for BPHE and recovery exchangers...................................................................15
11 FIELD WIRING....................................................................................................................................................16
11.1 Point for attention regarding quality of the public electric power supply ..........................................16
11.2 Interconnection cables.............................................................................................................................16
12 OPERATOR’S REPONSIBILITIES ....................................................................................................................17
13 MAINTENANCE..................................................................................................................................................18
13.1 Routine maintenance................................................................................................................................18
13.2 Electrical Installation ................................................................................................................................19
13.3 Service and limited warranty ...................................................................................................................19
14 BEFORE STARTING..........................................................................................................................................22
List of tables
Table 1-Technical specifications(1) ............................................................................................................................4
Table 2-Electrical specifications(1).............................................................................................................................4
Table 3- Flare nut spaces dimensions and appropriate tightening torque.........................................................10
Table 4-Charging the unit........................................................................................................................................12
Table 5- Water quality specification........................................................................................................................14
Table 6-Water flow operation range........................................................................................................................15
Table 7-Zmax (Ω) .......................................................................................................................................................16
Table 8-R410A Pressure / temperature table........................................................................................................18
Table 9–Standard Routine Maintenance Plan..........................................................................................................19
Table 10- Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment...........20
Table 11-Pre-commissioning check-list .................................................................................................................22
List of figures
Figure 1- Operation range EWLQ014-033KC............................................................................................................6
Figure 2-EWLQ049-064KC..........................................................................................................................................6
Figure 3-Connecting the refrigerant circuit (1) ......................................................................................................10
Figure 4-Connecting the refrigerant circuit (2) ......................................................................................................10
Figure 5-Connecting the refrigerant circuit (3) ......................................................................................................11
Figure 6- Connecting the refrigerant circuit (4) .....................................................................................................11
Figure 7- Charging the unit......................................................................................................................................12
Figure 8- Water piping evaporator-plastic bag 1 ...................................................................................................13
Figure 9-Water piping condenser-plastic bag (2) ..................................................................................................13
Figure 10-Flowswitch installation ...........................................................................................................................14
Figure 11- EWLQ 049 - 064 KCW1N Refrigerant circuit scheme..........................................................................21

D-EIMHP01601-22_00EN 3/25
Thank you for purchasing this Daikin air conditioner.
WARNING Read this manual attentively before starting up the unit. Do not throw it away. Keep it in your files for
future reference.
Improper installation or attachment of equipment or accessories could result in electric shock, short-circuit, leaks,
fire or other damage to the equipment. Be sure only to use accessories, optional equipment and spare parts made by
Daikin which are specifically designed for use with the equipment and have them installed by a professional.
If unsure of installation procedures or use, always contact your Daikin dealer for advice and information.
The English text is the original instruction. Other languages are translations of the original instructions.

D-EIMHP01601-22_00EN 4/25
1. INTRODUCTION
The unit is supplied and shipped with a holding charge of 0.5 bar nitrogen (N2). This unit must be charged with R410A
refrigerant.
Pay attention to the selection of your remote condenser. Make sure to select a remote condenser developed for use with R410A.
The EWLQ units can be combined with Daikin fan coil units or air handling units for air conditioning purposes. They can also be
used for supplying chilled water for process cooling.
The present installation manual describes the procedures for unpacking, installing and connecting the EWLQ units.
This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use
by lay persons.
Sound pressure level is less than 70 dB(A).
Table 1-Technical specifications (1)
Model EWLQ
014
025
033
Dimensions HxWxD
(mm)
600x600x600
Machine Weight
(kg)
104
138
149
Connections
•Chilled water inlet and outlet
G1
•Condenser discharge connection (copper)
Y
•Condenser liquid connection copper)
Model EWLQ
049
064
Dimensions HxWxD (mm)
600x600x1200
Machine weight (kg)
252
274
Connections
•Chiller water inlet and outlet (mm)
•Condenser discharge connection
(copper)
•Condenser liquid connection (copper)
G 1-1/2
3/4’’
3/4’’
5/8’’
5/8’’
Table 2-Electrical specifications (1)
General EWLQ
014-064
Power supply
Phase
3N~
Frequency
(Hz)
50
Voltage
(V)
400
Voltage
tolerance
(%)
±10
(1) Refer to the operation manual or engineering data book for the complete list of specifications, options and features.
5/8”
5/8”
5/8”
5/8”
3/4"
3/4"

D-EIMHP01601-22_00EN 5/25
1.1 Options and features (1)
Options
•BMS-connection MODBUS optional connectivity kit card:
- MODBUS TCP/IP
- BACNET MSTP
- BACNET TCP/IP
•Remote user interface (optional kit)
•Low noise operation kit (field installation)
•Entering water temperature kit
•Master/slave water temperature kit
•Modem for Daikin On Site
1.2 Features
•Glycol application for chilled water temperature down to -10°C
•Voltage free contacts
- general operation
- alarm
•Evaporator Water pump
•Backup heater
•Changeable remote inputs
- remote start/stop
- dual setpoint
- External Alarm
- Setpoint reset
(1) Refer to the operation manual or engineering data book for the complete list of specifications, options and features.

D-EIMHP01601-22_00EN 6/25
2 OPERATION RANGE
Figure 1- Operation range EWLQ014-033KC
Figure 2-EWLQ049-064KC
•ELWT: Evaporator leaving water temperature
•Tc: Saturated condensing temperature
•1: Operation with water
•2: Operation with glycol (below ELWT=4°C)

D-EIMHP01601-22_00EN 7/25
3 SELECTION OF LOCATION
The units are designed for indoor installation and should be installed in a location that meets the following requirements:
1. The foundation is strong enough to support the weight of the unit
and the floor is flat to prevent vibration and noise generation.
2. The space around the unit is adequate for servicing.
3. There is no danger of fire due to leakage of non-flammable gas.
4. Select the location of the unit in such a way that the sound generated by the unit does not disturb anyone.
Ensure that water cannot cause any damage to the location in case it drips out of the unit.
The equipment is not intended for use in a potentially explosive atmosphere
4 MAIN COMPONENTS
1. Compressor
2. Evaporator
3. Accumulator
4. Switchbox
5. Chilled water in
6. Chilled water out
7. Discharge stop valve
8. Liquid stop valve
9. Evaporator entering water temperature sensor (as accessory)
10. Evaporator leaving water temperature sensor
11. Freeze-up sensor
12. Digital Controller and display
13. Power supply intake
14. Ball valve (field installed)
15. Water filter (field installed)
16. Air purge valve (field installed)
17. T-joint for air purge (field installed)
18. Flow switch (with T-joint) (field installed)
19. Main switch

D-EIMHP01601-22_00EN 8/25
5 INSPECTING AND HANDLING THE UNIT
At delivery, the unit should be checked, and any damage should be reported immediately to the carrier claims agent.
6 UNPACKING AND PLACING THE UNIT
1. Cutthe straps and remove the cardboard box from the unit.
2. Cutthe straps and remove the cardboard boxes with water piping from the pallet.
3. Remove the four screws fixing the unit to the pallet.
4. Level the unit in both directions.
5. Use four anchor bolts with M8 thread to fix the unit inconcrete.
6. Remove the service front plate.
7 IMPORTANT INFORMATION REGARDING THE REFRIGERANT USED
This product is factory charged with N2.
The refrigerantsystem will be charged with fluorinated greenhouse gases covered by the Kyoto Protocol.
Do not vent gases intothe atmosphere.
Refrigerant type: R410A
GWP (1) value:2090
Please fill in with indelible ink,
▪the total refrigerant charge
(1) GWP = global warming potential

D-EIMHP01601-22_00EN 9/25
8 SELECTION OF PIPING MATERIAL
1. Foreign materials inside pipes (including oils for fabrication) must be 30 mg/10 m or less.
2. Use the following material specification for refrigerant piping:
- construction material: Phosphoric acid deoxidized seamless copper for refrigerant.
- size: Determine the proper size referring to "Technical specifications”.
- thepipe thickness of the refrigerant pipingmust comply withrelevant localand nationalregulations. For R410A the design pressure is
4.17 MPa.
3. In case the required pipesizes (inch sizes) are not available, it is also allowed to use other diameters (mm sizes), taken the
following into account:
- select the pipe size nearest to the required size.
- use the suitable adapters for the change-over from inch to mm pipes (field supply).
For the RLK regulation the flare nuts on the stop valves must be replaced by flare solder connections.
9 CONNECTING THE REFRIGERANT CIRCUIT
WARNING The units are equipped with a refrigerant outlet (discharge side) and a refrigerant inlet
(liquid side) for the connection to a remote condenser. This circuit must be provided by a licensed
technician and must comply with all relevant European and national regulations.
9.1 Precautions when handling piping
If air, moisture or dust gets in the refrigerant circuit, problems may occur. Therefore, always consider the following when
connecting the refrigerant piping:
1. Use clean and dry pipes only.
2. Hold the pipe end downwards when removing burrs.
3. Cover the pipe end when inserting it through a wall so that no dust and dirt enter.
WARNING When a condenser less unit is installed below the condensing unit, the following can occur:
•when the unit stops, oil will return to the discharge side of the compressor. When starting the unit,
this can cause liquid (oil) hammer.
•The oil circulation will decrease
To solve these phenomena, provide oil traps in the discharge pipe every 10m if the level difference is
more than 10m.

D-EIMHP01601-22_00EN 10/25
9.2 Connecting the refrigerant circuit
•Use a pipe cutter and flare suitable for R410A.
◼Installation tools: Make sure to use installation tools (gauge manifold charge hose, etc.) that are exclusively used for R410A installations to withstand
the pressure and to prevent foreign materials (e.g., mineral oils such as SUNISO and moisture) from mixing into the system.
Figure 3-Connecting the refrigerant circuit (1)
•Vacuum pump (use a 2-stage vacuum pump with a non-return valve):
- Make sure the pump oil does not flow oppositely into the system while the pump is not working.
- Use a vacuum pump which can evacuate to –100.7 kPa (5 Torr, –755 mm Hg).
•Be sure to use both a spanner and torque wrench together when connecting or disconnecting pipes to/from the
unit.
Figure 4-Connecting the refrigerant circuit (2)
1. Torquewrench
2. Spanner
3. Piping union
4. Flare nut
◼Refer to the table below for the dimensions of flare nut spaces and the appropriate
◼tightening torque. (Overtightening may damage the flare and cause leaks.)
Table 3- Flare nut spaces dimensions and appropriate tightening torque
Pipe gauge
Tightening torque
Flare dimension A (mm)
Flare shape
Ø 9.5
33~39 N•m
12.0~12.4
Ø 12.7
50~60 N•m
15.4~15.8
Ø 19.1
97~110 N•m
22.9~23.3
1 remote condenser
2 indoor water chiller
3 discharge
4 oil trap
5 liquid
A>0 m
A
A
10m 10 m
10m
30m

D-EIMHP01601-22_00EN 11/25
•When connecting the flare nut, coat the flare inner surface with ether oil or ester oil and initially tighten 3 or 4 turns by hand
before tightening firmly.
Figure 5-Connecting the refrigerant circuit (3)
•Check the pipe connector for gas leaks.
WARNING When inserting the refrigerant piping in the wall hole, take care not to let dust or moisture come
into the piping. Protect the pipes with a cap or seal the pipe end completely with tape.
Figure 6- Connecting the refrigerant circuit (4)
The discharge and liquid line are to relate to flare connections to the remote condenser piping. For use of the correct pipe diameter
see "Technical specifications".
piping length: equivalent = 50 m
maximum height = 30 m
WARNING Make sure the pipes are filled with N2 during welding in order to protect the pipes against soot.
There should be no blockage (stop valve, solenoid valve) between the remote condenser and the provided
liquid injection of the compressor.
9.3 Leak test and vacuum drying
The units were checked for leaks by the manufacturer.
After connection of the piping, a leak test must be performed and the air in the refrigerant piping must be evacuated to a value of 4
mbars absolute by means of a vacuum pump.
9.4 Open the discharge- and liquid stop valves.
1 to open
- Remove the cap (1) and turn the shaft (2) counterclockwise with hexagon socket screw keys (3) (JIS B 4648 nominal size 4
mm).
- Turn it all the way until the shaft stops.
- Tighten the cap firmly.
2 to close
- Remove the cap and turn the shaft clockwise.
- Tighten the shaft firmly until it reaches the sealed area (4) of the body.
- Tighten the cap firmly.

D-EIMHP01601-22_00EN 12/25
Figure 7- Charging the unit
NOTES
•Use a charging hose with push rod when using theserviceport (5).
•Make sure to keep stop valve open during operation.
•Check forrefrigerant gas leakage aftertightening the cap.
WARNING Do not purge the air with refrigerants. Use a vacuum pump to vacuum the installation.
Table 4-Charging the unit
Refrigerant charge (kg)
EWLQ014
0.9+(0.06xLLP) +(VRCx0.38)
EWLQ025
1.5+(0.12xLLP) +(VRCx0.38)
EWLQ033
2.0+(0.12xLLP) +(VRCx0.38)
EWLQ049
2x[2.0+(0.12xLLP) +(VRCx0.38)]
EWLQ064
2x[2.0+(0.12xLLP) +(VRCx0.38)]
VRC= volume of remote condenser (l)
LLP= length of liquid pipe (m)
9.5 Next perform a fine-tuning
For fine-tuning of the refrigerant charge, the compressor must operate.
•If the liquid-line sight glass is showing seal after the rough charging (due to possible different conditions), add 10%
refrigerant charge weight.
•If the liquid-line sight glass is showing some glass bubbles, the rough refrigerant charge is sufficient by fine-tuning the
additional 10% refrigerant charge weight.
•If the liquid-line sight glass is showing flash gas, then charge until the additional 10% refrigerant charge weight. The unit
must have time to stabilize which means that this charging must be done in a smooth way.
WARNING Take care for contamination of the remote condenser in order to avoid blocking of the system. It is
impossible for Daikin to control the contamination of the "foreign" condenser of the installer. The Daikin unit has a strict
contamination level.
WARNING Use the liquid line check valve for charging refrigerant and make sure to charge liquid.

D-EIMHP01601-22_00EN 13/25
10 CHECKING THE WATER CIRCUIT
The units are equipped with a water inlet and water outlet for connection to a chilled water circuit. This circuit must be provided by a
licensed technician and must comply with all relevant European and national regulations.
WARNING The unit is only to be used in a closed water system. Application in an open water circuit can lead to excessive
corrosion of the water piping.
Before continuing the installation of the unit, check the following points:
•Additional components not delivered with the unit:
1. A circulation pump must be provided in such a way that it discharges the water directly into the heat exchanger.
2. Drain traps must be provided at all low points of the system to permit complete drainage of the circuit during
maintenance or in case of shut down.
3. Anti-vibration systems in all water piping connected to the chiller are recommended to avoid straining the piping and
transmitting vibration and noise.
•Additional water piping delivered with the unit
All additional water piping must be installed on the system according to the piping diagram as mentioned in the operation manual. The
flowswitch must be connected as described on the wiring diagram. See also chapter "Before starting".
Figure 8- Water piping evaporator-plastic bag 1
2x Ball valve
1x Water filter
1x Air purge
1x T-joint for air purge
2x Flow switch pipe
1xFlowswitch+
1x T-joint
Figure 9-Water piping condenser-plastic bag (2)
2x Ball valve
1x Water filter
1x Air purge
1x T-joint for air purge

D-EIMHP01601-22_00EN 14/25
1. A flow switch must be installed in the water outlet pipe of the evaporator to prevent the unit from operating at a water flow
which is too low.
WARNING It is very important to install the flow switch as shown in the figure. Observe the position of the flow switch in
relation to the direction of the water flow. If the flow switch is mounted in any other position, the unit is not protected
properly against freezing.
Figure 10-Flowswitch installation
A specific terminal is provided in the switch box for the electrical connection of the flow switch. Refer to the wiring diagram
2. Shut-off valves must be installed at the unit so that normal servicing of the water filter can be accomplished without
draining the complete system.
3. Air purge valves must be provided at all high points of the system. The vents should be located at points which are
easily accessible for servicing.
4. The water filter must be installed in front of the unit for removing dirt from the water to prevent damage to the unit or
malfunctioningofthe evaporator.
5. Thewaterfilter must becleaned on a regular base.
Table 5- Water quality specification
DAE Water quality requirements
BPHE
Ph (25 °C)
7.5 –9.0
Electrical conductivity [μS/cm] (25°C)
< 500
Chloride ion [mg Cl-/ l]
< 70
Sulphate ion [mg SO42- / l]
< 100
Alkalinity [mg CaCO3/ l]
< 200
Total Hardness [mg CaCO3/ l]
75 ÷ 150
Iron [mg Fe / l]
< 0.2
Ammonium ion [mg NH4+ / l]
< 0.5
Silica [mg SiO2/ l]
-
Chlorine molecular (mg Cl2/l)
< 0.5
10.1 Connecting the water circuit
The evaporator is provided with GAS female pipe thread connections for the water inlet and outlet (refer to the outlook diagram). Evaporator water
connections are to be made in accordance with the outlook diagram,respecting the water in- and outlet.
If air, moisture or dust gets in the water circuit, problems may occur. Therefore, always consider the following when connecting the water
circuit:
1. Use clean pipes only.
2. Hold the pipe end downwards when removing burrs.
3. Cover the pipe end when inserting it through a wall so that no dust and dirt enter.

D-EIMHP01601-22_00EN 15/25
WARNING Use a good thread sealant for the sealing of the connections. The sealing must be able to withstand the pressures and
temperatures of the system, it must also be resistant to the used glycol in the water.
The external surface of the water pipes must be adequately protected against corrosion.
10.2 Water charge, flow and quality
To assure proper operation of the unit a minimum water volume is required in the system and the water flow through the
evaporator must be within the operation range as specified in the table below.
Table 6-Water flow operation range
Minimum
water volume (l)
Minimum
water flow
Maximum
water flow
EWWQ014
62
31 l/min
75 l/min
EWWQ025
134
53 l/min
123 l/min
EWWQ033
155
76 l/min
186 l/min
EWWQ049
205
101 l/min
247 l/min
EWWQ064
311
152 l/min
373 l/min
10.3 Water piping insulation
The complete water circuit, inclusive all piping, must be insulated to prevent condensation and reduction of the cooling capacity.
10.4 Refrigerant piping insulation
To prevent burning injuries by accidental touching the hot (max 135°C) discharge pipe, it must be insulated thoroughly.
A minimum of insulation to protect the liquid pipe from damage is advisable.
10.5 Antifreeze protection for BPHE and recovery exchangers
If the exchangers are completely empty and cleaned with antifreeze solution, additional methods can be used against freezing.
The following protection methods must be considered when designing the system as a whole:
1. continuous water flow circulation inside piping and exchangers.
2. addition of an appropriate amount of glycol inside the water circuit or, as alternative, an additional heat insulation and
heating of exposed piping (internal and external to the unit).
3. if the unit does not work during the winter season, emptying and cleaning of the heat exchanger.
It is the responsibility of the installer and/or of local maintenance personnel to ensure that described antifreeze methods are
used.
Make sure that appropriate antifreeze protection is always maintained. Failing to follow the instructions above could result in unit
damage.
WARNING Damage caused by freezing is excluded from the warranty, therefore Daikin Applied Europe S.p.A.
declines all responsibility.

D-EIMHP01601-22_00EN 16/25
11 FIELD WIRING
WARNING All field wiring and components must be installed by a licensed electrician
and must comply with relevant European and national regulations.
The field wiring must be carried out in accordance with the wiring diagram supplied
with the unit and the instructions given below.
Be sure to use a dedicated power circuit. Never use a power supply shared by another
appliance.
Power circuit and cable requirements
1. The electrical power supply to the unit must be arranged so that it can be switched on or off independently of the electrical supply to
other items of the plant and equipment in general.
2. A power circuit must be provided for connection of the unit. This circuit must be protected with the required safety devices, i.e., a circuit
breaker, a slow blow fuse on each phase and an earth leak detector. Recommended fuses are mentioned on the wiring diagram
supplied with the unit.
Switch off the main isolator switch before making any connections (switch off the circuit breaker, remove or switch off the fuses).
Connection of the water-cooled water chiller power supply
1. Install cable gland to proper tight main power supply cable
2. Using the appropriate cable, connect the power circuit to the N, L1, L2 and L3 terminals of the unit. (cable section
2.5~16mm2).
3. Connect the earth conductor (yellow/green) to the earthing terminal PE.
11.1 Point for attention regarding quality of the public electric power supply
This equipment complies with EN/IEC 61000-3-11(1)provided that the system impedance Zsys is less than or equal to Zmax at the
interfacepoint between the user's supply and the public system. It is the responsibility of the installer or user of the equipment to ensure,by
consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a system impedance Zsys
less than or equal to Zmax. Table 7-Zmax (Ω)
Zmax (Ω)
EWLQ014
0.28
EWLQ025
0.23
EWLQ033
0.21
EWLQ033
0.22
EWLQ064
0.20
Complying with EN/IEC 61000-3-12(2)
11.2 Interconnection cables
◼Voltage free contacts The PCB is provided with some voltage free contacts to indicate the status of the unit.
The PCB is also provided with a voltage free contact for the operation of fans.
When the compressor is running, the contact is closed, and a fan contact can be activated.
These voltage free contacts can be wired as described on the wiring diagram.
◼Remote inputs Besides the voltage free contacts, there are also possibilities to install remote inputs.
They can be installed as shown on the wiring diagram.

D-EIMHP01601-22_00EN 17/25
12 OPERATOR’S REPONSIBILITIES
It is essential that the operator is appropriately trained and becomes familiar with the system before operating the unit. In addition to
reading this manual, the operator must study the microprocessor operating manual and the wiring diagram to understand start-up
sequence, operation, shutdown sequence and operation of all the safety devices.
During the unit initial start-up phase, a technician authorized by the manufacturer is available to answer any questions and to give
instructions as to the correct operating procedures.
The operator must keep a record of operating data for every installed unit. Another registration must also be kept for all the
periodic maintenance and assistance activities.
If the operator notes abnormal or unusual operating conditions, he is advised to consult the technical service authorized by the
manufacturer.
If the unit is switched off, the compressor oil heater cannot be used. Once the unit is reconnected to the mains,
leave the compressor oil heater charged for at least 6 hours before restarting the unit.
Failure to observe this rule may cause damage to the compressors due to excessive accumulation of liquid
inside them.
This unit represents a substantial investment and deserves the attention and care to keep this equipment in good working order.
However, during operation and maintenance it is essential to observe the following instructions:
•Do not allow unauthorized and / or unqualified personnel to access the unit.
•It is forbidden to access the electrical components without having opened the unit main switch and switched off the power supply.
•It is forbidden to access the electrical components without using an insulating platform. Do not access the electrical components if water
and/or moisture are present.
•Verify that all operations on the refrigerant circuit and on the components under pressure are carried out exclusively by qualified
personnel.
•The replacement of the compressors must be carried out exclusively by qualified personnel.
•Sharp edges and the surface of the condenser section could cause injury. Avoid direct contact and use adequate protection
device.
•Do not introduce solid objects into the water pipes while the unit is connected to the system.
•It is absolutely forbidden to remove all protections of moving parts.
In case of sudden stop of the unit, follow the instructions on the Control Panel Operating Manual which is part of the on-board
documentation delivered to the end user.
It is strongly recommended to perform installation and maintenance with other people.
Avoid installing the unit in areas that could be dangerous during maintenance operations, such as platforms without parapets or railings
or areas not complyingwith the clearance requirements around theunit.

D-EIMHP01601-22_00EN 18/25
13 MAINTENANCE
Table 8-R410A Pressure / temperature table
°C
Bar
°C
Bar
°C
Bar
-13
5.22
14
12.30
41
24.95
-12
5.41
15
12.65
42
25.56
-11
5.60
16
13.02
43
26.18
-10
5.79
17
13.39
44
26.81
-9
6.00
18
13.77
45
27.45
-8
6.20
19
14.15
46
28.10
-7
6.42
20
14.55
47
28.77
-6
6.63
21
14.95
48
29.44
-5
6.86
22
15.37
49
30.13
-4
7.09
23
15.79
50
30.84
-3
7.32
24
16.22
51
31.55
-2
7.56
25
16.65
52
32.28
-1
7.81
26
17.10
53
33.02
0
8.06
27
17.56
54
33.78
1
8.32
28
18.02
55
34.55
2
8.59
29
18.49
56
35.33
3
8.86
30
18.98
57
36.13
4
9.14
31
19.47
58
36.95
5
9.42
32
19.97
59
37.78
6
9.71
33
20.48
60
38.62
7
10.01
34
21.01
61
39.48
8
10.32
35
21.54
62
40.36
9
10.63
36
22.08
63
41.25
10
10.95
37
22.63
64
42.16
11
11.27
38
23.20
65
43.09
12
11.61
39
23.77
66
44.04
13
11.95
40
24.36
67
45.01
13.1 Routine maintenance
This unit must be maintained by qualified technicians. Before beginning any work on the system, the personnel shall assure that
all security precautions have been taken.
Neglecting unit maintenance could degrade all parts of the units (coils, compressors, frames, pipes, etc.) with negative effect on
performances and functionality.
There are two different levels of maintenance, which can be chosen according to the type of application (critical/noncritical) or to
the installation environment (highly aggressive).
Examples of critical applications are process cooling, data centres, etc.
Highly Aggressive Environments can be defined as the follows:
•Industrial environment (with possible concentration of fumes result of combustion and chemical process).
•Coastal environment.
•Highly polluted urban environment.
•Rural environment close to of animal excrement and fertilizers, and high concentration of exhaust gas from diesel generators.
•Desert areas with risk of sandstorms.
•Combinations of the above.
•Unit exposed to a highly aggressive environment can face corrosion in a shorter time than ones installed on a standard
environment. Corrosion causes a rapid rusting of the frame core, consequently, decreases unit structure lifetime. To avoid
that, it is necessary to wash periodically the frame surfaces with water and suitable detergents.
•In case of part of unit frame paint came off, it is important to stop its progressive deterioration by repainting the exposed
parts using proper products. Please contact factory to get the required products specifications.
•In case of just salt deposits are present, it is enough to rinse the parts with fresh water.

D-EIMHP01601-22_00EN 19/25
13.2 Electrical Installation
WARNING All electrical maintenance activities must be followed by qualified personnel. Make sure the system
is switched off and the main switch of the unit open. Failure to observe this rule could result in serious
personal injury. When the unit is turned off, but the disconnection switch is in the closed position, the unused
circuits will still be active.
The maintenance of the electrical system consists of the application of some general rules as follows:
1. the current absorbed by the compressor must be compared to the rated value. Normally the value of the absorbed current is lower
than the rated value that corresponds to the absorption of the full load compressor at the maximum operating conditions.
2. at least once every three months all the security checks must be made to verify their functionality. Each appliance, with aging, can
change its point of operation and this must be monitored to adjust it or replace it. The pump interlocks and flow switches must be
checked to make sure that they interrupt the control circuit if they intervene.
13.3 Service and limited warranty
All units are factory tested and guaranteed for 12 months as of the first start-up or 18 months as of delivery.
These units have been developed and constructed according to high quality standards ensuring years of failure free operation.
However, the unit requires maintenance even during the warranty period, from the time of installation and not just from the
commissioning date. We strongly advise stipulating a maintenance contract with a service authorized by the manufacturer to ensure
efficient and problem free service, thanks to the expertise and experience of our personnel.
It must be borne in mind that operating the unit in an inappropriate manner, beyond its operating limits or not performing proper
maintenance according to this manual can void the warranty. Observe the following points, to conform to warranty limits:
1. The unit cannot function beyond the specified limits.
2. The electrical power supply must be within the voltage limits and without voltage harmonics or sudden changes.
3. The three-phase power supply must not have an unbalance between phases exceeding 3%. The unit must stay turned off
until the electrical problem has been solved.
4. No safety device, either mechanical, electrical or electronic must be disabled or overridden.
5. The water used for filling the water circuit must be clean and suitably treated. A mechanical filter must be installed at the
point closest to the BPHE inlet.
6. The value of the BPHE water flow must be included in the declared range for the unit considered, refer to the CSS selection
software. Table 9–Standard Routine Maintenance Plan
Monthly Yearly/Seasonal
List of Activities Weekly (Note 1) (Note 2)
General:
Reading of operating data (Note 3)
X
Visual inspection of unit for any damage and/or loosening
X
Verification of thermal insulation integrity
X
Cleaning
X
Paint where necessary
X
Analysis of water (4)
X
Check of flow switch operation
X
Electrical Installation:
Verification of control sequence
X
Verify contactor wear –Replace if necessary
X
Verify that all electrical terminals are tight –Tighten if necessary
X (Quarterly)
Clean inside the electrical panel
X
Visual inspection of components for any signs of overheating
X
Verify operation of compressor and electrical resistance
X
Refrigeration circuit:
Check for any refrigerant leakage (leak test)
X
Analyse compressor vibrations
X
Hydraulic circuit:
Check for any water leakage
X
Check hydraulic connections
X
Check the pressure at the exchangers water inlet
X
Clean the water filter
X
Check the glycol concentration
X
Check the water flow rate
X
BPHE:
Check the cleaning of the BPHE
X
Notes:
1. Monthly activities includealltheweekly ones.
2. The annual (or earlyseason) activities include allweekly and monthly activities.
3. Daily reading of the operating valuesofthe unit allowsmaintaining high observationalstandards.
4. Checkfor any dissolvedmetals.
5. Clean condenser banks with clean water and water heat exchangers with appropriate chemicals. Particles and fibres could clog up the exchangers, especially

D-EIMHP01601-22_00EN 20/25
for water exchangers pay attention if water rich in calcium carbonate is used. An increase in pressure drops or a decrease in thermal efficiency means that the
heat exchangers are clogged. In environments with a high concentration of airborne particles, it might be necessary to clean the condenser bank more often.
6. Units placed or stored in a Highly Aggressive Environment for long time without operation are still subject to those routine maintenance steps.
Table 10- Routine Maintenance Plan for Critical Application and/or Highly Aggressive Environment
Notes:
7. Monthly activities include all the weekly ones.
8. The annual (or early season) activities include all weekly and monthly activities.
9. Daily reading of the operating values of the unit allows maintaining high observational standards.
10. Check for any dissolved metals.
11. Clean condenser banks with clean water and water heat exchangers with appropriate chemicals. Particles and fibres could clog up the exchangers, especially
for water exchangers pay attention if water rich in calcium carbonate is used. An increase in pressure drops or a decrease in thermal efficiency means that the
heat exchangers are clogged. In environments with a high concentration of airborne particles, it might be necessary to clean the condenser bank more often.
12. Units placed or stored in a Highly Aggressive Environment for long time without operation are still subject to those routine maintenance steps.
Monthly Yearly/Seasonal
List of Activities (Note 8) Weekly (Note 1) (Note 2)
General:
Reading of operating data (Note 3)
X
Visual inspection of unit for any damage and/or loosening
X
Verification of thermal insulation integrity
X
Cleaning
X
Paint where necessary
X
Analysis of water (4)
X
Check of flow switch operation
X
Electrical Installation:
Verification of control sequence
X
Verify contactor wear –Replace if necessary
X
Verify that all electrical terminals are tight –Tighten if necessary
X
Clean inside the electrical control board
X
Visual inspection of components for any signs of overheating
X
Verify operation of compressor and electrical resistance
X
Measure compressor motor insulation
X
Refrigeration circuit:
Check for any refrigerant leakage (leak test)
X
Analyse compressor vibrations
X
Hydraulic circuit:
Check for any water leakage
X
Check hydraulic connections
X
Check the pressure at the exchangers water inlet
X
Clean the water filter
X
Check the glycol concentration
X
Check the water flow rate
X
BPHE:
Check the cleaning of the BPHE
X