Daikin EWAQ~G-SS User manual

D-EIMAC01207-15EN - 1/22
Air Cooled Chiller Multiscroll
EWAQ~G-
SS (Standard Efficiency - Standard Noise)
SR (Standard Efficiency - Reduced Noise)
XS (High Efficiency - Standard Noise)
XR (High Efficiency - Reduced Noise)
Refrigerant: R410A
Original Instructions
Installation, Operation and Maintenance Manual
D–EIMAC01207-15EN

D-EIMAC01207-15EN - 2/22
Table of contents
Description.................................................................................................................................................................3
General Information....................................................................................................................................................3
Receiving the unit.......................................................................................................................................................3
Storage.......................................................................................................................................................................3
Operation....................................................................................................................................................................3
Figure 1 - Description of the labels applied to the electrics panel...............................................................................4
Figure 2 - Operating limits...........................................................................................................................................4
Safety .........................................................................................................................................................................7
Positioning and assembly...........................................................................................................................................8
Figure 3 - Distances to be complied with:...................................................................................................................8
Noise ..........................................................................................................................................................................8
Handling and lifting.....................................................................................................................................................8
Figure 4 –Lifting the unit ............................................................................................................................................9
Sound protection.........................................................................................................................................................9
Hydraulic circuit for connection to the unit ..................................................................................................................9
Pipe insulation ..........................................................................................................................................................10
Installing the flow switch...........................................................................................................................................10
Preparing and checking the water circuit connection................................................................................................10
Water treatment........................................................................................................................................................11
Water flow and volume .............................................................................................................................................11
Anti-freeze protection for evaporators and recovery exchangers..............................................................................12
Electrical system General specifications...................................................................................................................12
Wiring at the installation site.....................................................................................................................................13
Electric circuit and wiring requirements ....................................................................................................................13
Connection of the unit power supply.........................................................................................................................13
Interconnecting wires................................................................................................................................................13
Before start-up..........................................................................................................................................................13
Open the isolation and/or shut off valves..................................................................................................................14
User responsibilities..................................................................................................................................................14
Periodical maintenance ............................................................................................................................................14
Service and limited guarantee ..................................................................................................................................14
Mandatory periodical checks and start-up of Groups (units).....................................................................................15
Bleeding refrigerant gas from the safety valve..........................................................................................................15
Important information regarding the refrigerant used................................................................................................16
Product lifespan........................................................................................................................................................16
Disposal....................................................................................................................................................................16
Figure 5 –Unit wiring in installation site....................................................................................................................17

D-EIMAC01207-15EN - 3/22
Thankyouforpurchasingthischiller
Thismanualisanimportantsupportdocumentforqualifiedpersonnelbutitisnotintendedtoreplacesuchpersonnel.
READ THIS MANUAL CAREFULLY BEFORE INSTALLING AND
STARTINGUPTHEUNIT.
IMPROPERINSTALLATIONCOULDRESULTINELECTRICSHOCK,
SHORT-CIRCUIT,COOLANTLEAKS,FIREOROTHERDAMAGETO
EQUIPMENTORINJURY.
THE UNIT MUST BE INSTALLED BY A PROFESSIONAL
OPERATOR/TECHNICIAN.
UNIT STARTUP MUST BE PERFORMED BY AUTHORISED,
TRAINEDPERSONNEL.
ALLACTIVITIESMUST BECARRIEDOUTINACCORDANCEWITH
LOCALLAWSANDREGULATIONS.
IFTHEINSTRUCTIONSINTHISMANUALARENOTABSOLUTELY
CLEAR,DONOTINSTALLAND/ORORSTARTUPTHEUNIT.
IFCASEOFDOUBTCONTACTTHEMANUFACTURER'S
REPRESENTATIVEFORADVICEANDINFORMATION.
Description
The unit purchased is a Water Chiller that is designed
to cool water (or a water-glycol mixture) within certain
limits which will be listed below. The unit operates
based on the compression, condensation and
evaporation of vapour as per the Carnot cycle and
consists mainly of the following components:
- One or more scroll compressors which increase the
pressure of the refrigerant gas from evaporation
pressure to condensation pressure.
- A condenser where the refrigerant gas condenses
under high pressure and transfers heat to the
water.
- An expansion valve which allows the pressure of
condensed liquid refrigerant to be reduced from
condensation pressure to evaporation pressure.
- An evaporator, where the low pressure liquid
refrigerant evaporates and chills the water.
General Information
All the units are delivered with wiring diagrams,
certified drawings, ID plate and DoC (Declaration of
Conformity). These documents list all the technical
data of the unit acquired and CONSTITUTE AN
INTEGRALANDESSENTIALPARTOFTHISMANUAL.
In the event of any discrepancy between this manual
and the appliance documents, please refer to the
documents that come supplied with the unit. In case of
doubt, contact the manufacturer's representative.
The aim of this manual is to make sure that the installer
and the qualified operator can properly commission,
operate and maintain the unit without creating any risk
to people, animals or things.
Receiving the unit
The unit must be inspected for any possible damage
immediately upon reaching final place of installation. All
components described in the delivery note must be
inspected and checked.
Should there be evidence of damage, do not remove
the damaged components and immediately report the
extent and type of damage both to the transportation
company, asking them to inspect it, and the
manufacturer's representative, sending if possible
photos which may be useful in identifying those
responsible.
Damage must not be repaired before the inspection of
the transportation company representative and the
manufacturer's representative.
Before installing the unit, check that the model and
power supply voltage shown on the nameplate are
correct. The manufacturer will not accept responsibility
for any damage following acceptance of the unit.
Storage
The unit must be protected from dust, rain, constant
exposure to the sun and possible corrosive agents and
rodents when being stored outside before installation.
Even though it is covered by a heat-shrinking plastic
sheet, this is not intended for long-term storage and
must be removed as soon as the unit is unloaded. The
unit must be protected by tarpaulins or suchlike which
are more suitable for the long term.
Storage conditions must be within the following limits:
Minimum ambient temperature: -20 °C
Maximum ambient temperature: +42 °C
Maximum relative humidity: 95% without condensation.
If the unit is stored at a temperature below the minimum
ambient temperature, the components may be
damaged, while at a temperature above the maximum
ambient temperature, the safety valves could open and
discharge the refrigerant into the atmosphere.
Operation
Operation outside any of the above-mentioned limits
may damage the unit.
In case of doubt, contact manufacturer's representative.
.

D-EIMAC01207-15EN - 4/22
Figure 1 - Description of the labels applied to the electrics panel
Identification of labels
*With the exception of the unit ID plate, which is always in the same position, the other plates may be in different
positions depending on the model and options on the unit.
Figure 2 - Operating limits
EWAQ G SS (Standard efficiency–Standard noise)
Water temperature at outlet (°C)
1–Slack electrical cable warning
5–Type of gas
2–Hazardous voltage warning
6–Non flammable gas symbol
3 –Electrical hazard symbol
7–Unit ID plate information
4 –Manufacturer’s logo
8–Lifting instructions
Ambient temperature (°C)

D-EIMAC01207-15EN - 5/22
EWAQ G SR (Standard efficiency –Reduced noise)
Water temperature at outlet (°C)
EWAQ G XS (High efficiency –Standard noise)
Water temperature at outlet (°C)
Ambient temperature (°C)
Ambient temperature (°C)

D-EIMAC01207-15EN - 6/22
EWAQ G XR (High efficiency - Reduced noise)
Water temperature at outlet (°C)
Notes
The diagram shows the guide lines for the range of operating limits. Refer to the Chiller Selection Software (CSS) for the
true operating limits under working conditions for each model.
Legend
Ambient temperature (°C) = Air temperature at condenser inlet (°C)
Water temperature at outlet (°C) = Water temperature at evaporator outlet (°C)
A= Operating with glycol
B= Operating with fan speed mode selected
C= Operating at maximum fan speed
Table 1 - Evaporator –Difference in temperature Δt at Minimum and Maximum
Legend
A= Δt Maximum difference in evaporator water temperature
B= Δt Minimum difference in evaporator water temperature
Table 2 –Evaporator –Scaling factor
Legend
A= Scaling factor (m² °C / kW)
B= Refrigeration capacity correction factor
C = Power consumption correction factor
D= EER correction factor
Ambient temperature (°C)
Water temperature at outlet (°C)

D-EIMAC01207-15EN - 7/22
Table 3 - Air heat exchanger - Correction factor at altitude
Legend
A = Altitude above sea level (m)
B = Atmospheric pressure (mbar)
C = Refrigeration capacity correction factor
D= Power consumption correction factor
- The maximum operating altitude is 2000 metres above sea level
- If the unit is to be installed at an altitude of between 1000 and 2000 metres above sea level, contact manufacturer.
Table 4 –Minimum percentage of glycol for low air ambient temperature
Legend
AAT = Ambient Air Temperature (°C) (2)
A= Ethylene glycol (%) (1)
B= Propylene glycol (%) (1)
(1) Minimum percentage of glycol to prevent the water circuit from freezing at the indicated ambient air temperature.
(2) Ambient air temperature which exceeds unit operating limits.
Water circuits must also be protected in winter even if the unit is not being used.
Legend
A= External Static Pressure (Pa)
B= Refrigeration capacity correction factor (kW)
C = Power consumption correction factor (kW)
D = Reduction of maximum temperature of the air which passes through the condenser
Safety
The unit must be firmly secured to the ground.
The following instructions must be followed:
Never access electrical components without having
first closed the main switch and switched off the
power supply.
Never access electrical components without some
form of insulation. Never access electrical
components if water and/or moisture are present.
Always disconnect the power supply by closing the
main switch before carrying out any work on the
cooling fans and/or compressors. Failure to do so
may result in serious injury.
Sharp edges can cause injuries. Avoid direct
contact with components and wear suitable PPE.
Do not introduce solid objects into water pipes.
A mechanical filter must be fitted to the water pipe
connected to the heat exchanger inlet.
The unit is supplied with high pressure switches
and/or safety valves, that are installed on both the
high-pressure and low-pressure sides of the
refrigerant circuit: pay attention.
It is absolutely forbidden to remove any protection
system covering moving parts.
In the event of a sudden stop, follow the instructions in
the Control Panel Instruction Manual which is part of
the documentation supplied with the unit.
We strongly recommend that installation and
maintenance operations are be performed alone but
with other people present.
In the event of an accident or problem:
Keep calm
Press the alarm button, if present or close the main
switch
Move the injured person to a warm place far from
the unit and in place him or her in the recovery
position
Immediately contact any emergency personnel in
the building or the call the Emergency Services
Wait until emergency personnel arrive and do not
leave the injured person alone
Give all necessary information to the emergency
personnel.

D-EIMAC01207-15EN - 8/22
Positioning and assembly
The unit must be installed on a solid, perfectly level
base. For earthing purposes, a solid cement base, that
is wider than the unit, must be made. This base must be
able to support the weight of the unit.
Anti-vibration supports must be installed between the
frame of the unit and the cement base of the steel
beams; for such installation follow the dimensional
drawing supplied with the unit.
The frame of theunit must be perfectly levelled during
installation, if necessary using shims to be inserted
under the the anti-vibration supports.
Before first start-up, the installation must be confirmed
as being level and horizontal using a laser level or
another suitable instrument.
Any error in the level and horizontal position must not
be greater than 5 mm per unit up to 7 metres and
10mm per unit over 7 metres.
If the unit is installed in places that are easily accessible
to people and animals, we recommend that protection
grates are fitted all round to prevent access. To ensure
optimal performance in installation site, the following
precautions and instructions must be respected:
- Make sure that there is a strong, solid foundation to
reduce noise and vibrations.
- Avoid installing the unit in areas that could be
dangerous during maintenance operations, such as
platforms without handrails, guide rails or in areas that
fail to comply with requirements as regards free space
around the unit.
The installer is responsible for calculating the best
position for the unit.
It is vital that all minimum distances for all units are
complied with to ensure there is adequate ventilation for
the condenser racks.
When deciding where to position the unit and to ensure
proper airflow, the following factors must be taken into
consideration:
avoid the recirculation of hot air
avoid insufficient air supply for the air cooling
condenser.
Both these conditions can cause an increase in
condenser pressure which can lead to poor energy
efficiency and refrigerating capacity.
If two or more units are positioned alongside each
other, we recommend leaving a space of at least 3600
millimetres between condenser racks. Each side of the
unit must be accessible for post-installation
maintenance work.
It is therefore vital that the minimum access distances in
front of the electrical panel are complied with: 1500 mm.
The manufacturer cannot be expected to consider all
these factors. In the unit design stage, we therefore
recommend that you consult an authorised
manufacturer representative for further solutions.
Figure 3 - Distances to be complied with:
Noise
The noise generated by the unit is mainly due to the
rotation of compressors.
The noise level for each model size is listed in sales
documentation.
If the unit is correctly installed, operated and
maintained, noise emission levels do not require any
special protective devices to operate continuously close
to the unit without any risk.
In case of installation with special noise requirements it
may be necessary to install additional noise softening
devices.
Handling and lifting
The unit must be lifted with the utmost care and
attention, following the lifting instructions shown on the
label applied to the electric panel. Lift the unit very
slowly, keeping it perfectly level.
Avoid bumping and/or shaking the unit during handling
and loading/unloading operations from the
transportation vehicle, push or pull the unit only using
the base frame. Secure the unit inside the truck to
prevent it from moving and causing damage. Do not
allow any part of the unit to fall during
loading/unloading.
All units have lifting points. Only these points may be
used for lifting the unit, as shown in the following figure.
Handling and lifting with a fork lift is the only alternative
method.
Both the lifting ropes and the spacing bars must
be strong enough to support the unit safely. Check
the weight of the unit on its name plate, because

D-EIMAC01207-15EN - 9/22
the weight of the units varies depending on the
accessories requested.
Figure 4 –Lifting the unit
(The illustration only shows the version with 6 fans. The lifting method used for other versions with
a different number of fans is identical)
N.B.: Follow the lifting instructions provided in the ID plate fastened to the electrical panel.
8: 8 –Lifting instructions
Alternative:
1–Remove before installation
2- Only use lifting hooks fitted with appropriate locking devices.
The hooks must be safely fastened before performing the handling
3–Fork lift truck
Sound protection
When sound levels require special control, great care
must be taken to isolate the unit from its base by
appropriately applying anti-vibrating elements.
Flexible joints must also be installed on the water
connections.
Hydraulic circuit for connection to the unit
The pipes must be designed with the lowest number
of elbows and the lowest number of vertical changes
of direction. In this way, installation costs are
reduced considerably and system performance is
improved.

D-EIMAC01207-15EN - 10/22
The water system must have:
1. Anti-vibrating pipes which reduce the
transmission of vibrations to the structures.
2. Isolating valves to isolate the unit from the water
system of the installation during service
operations.
3. Manual or automatic air venting device at the
system’s highest point.; drain device at the
system’s lowest point.
4. Neither the evaporator nor the heat recovery
device must be positioned at the system’s highest
point.
5. A suitable device that can maintain the water
system under pressure.
6. Water temperature and pressure indicators to
assist the operator during service and
maintenance.
7. A water filter or a device that can remove particles
from the liquid and is mandatory at the entry of
the evaporator.
The filter can be installed at the pump inlet when
it is placed on the evaporator water inlet pipe but
only if the cleanliness of the water installation
between the pump and the evaporator is
guaranteed. Any waste in the evaporator will void
the unit guarantee.
8. If the unit is being replaced, empty and clean the
entire water system before installing a new one
and prior to starting it, carry out adequate tests
and chemical treatments of the water.
9. If glycol is added to the water system to provide
anti-freeze protection, the performance of the unit
will decrease. All unit-protection systems, such as
anti-freeze, and low-pressure protection will need
to be readjusted to offset the low pressure.
10. Before insulating water piping, check that there
are no leaks.
11.Check that the pressure of the water does not
exceed the design pressure of the water side
heat exchangers and install a safety valve on the
pipe of the water.
12. Install a suitable expansion tank.
CAUTION
To avoid damage, install an inspectionable filter
on the water pipes at the entry to the heat
exchangers.
Pipe insulation
The complete water circuit, including all pipes, must
be insulated to avoid condensate from forming and
reducing cooling capacity.
Protect water pipes from freezing during the winter
(using for example a glycol solution or a heating
cable).
Installing the flow switch
To guarantee sufficient water flow to the entire
evaporator, it is vital that a flow switch be installed on
the water circuit which can be positioned on the
incoming or outgoing water pipes. The purpose of the
flow switch is to stop the unit in the event of interrupted
water flow, thus protecting the evaporator from freezing.
The manufacturer may offer a flow switch specially
selected for this purpose.
This paddle-type flow switch is suitable for heavy-duty
applications and 2 1/2" pipe diameters.
It has a clean contact that is electrically connected to
the terminals shown in the wiring diagram, and must be
calibrated so that it intervenes when the flow of the
water of the evaporator drops below 80% of the nominal
flow and in any case within the limits listed in the
following table.
Preparing and checking the water circuit connection
The units have a water input and output for the
connection of the chiller to water circuit of the system.
This circuit must be connected to the unit by an
authorised technician and must comply with all the
current national and European regulations on the
subject.
NOTE - The components listed below are not included
with the unit, but are supplied upon request, also if
their installation is compulsory.
If dirt penetrates the water circuit, there could
be problems. Therefore always remember the
following when connecting the water circuit:
1. Only use pipes that are clean inside.
2. Keep the end of the pipe facing downward
when removing any burrs.
3. Cover the end of the pipe when inserting it
through a wall to avoid dust and dirt getting
in.
4. Clean the pipes of the system located
between the filter and the unit, with running
water, before connecting it to the system.

D-EIMAC01207-15EN - 11/22
1 2 3 4 5 6 7
1 Evaporator water inlet
2 Flow Switch
3 Water inlet sensor
4 Water inlet pipe with flow switch and water
inlet temperature sensor
5 Joint
6 Counter-pipe
7 In situ water pipe circuit
8 Filter
9 Filter and cup
The water in the system must be particularly clean and
all traces of oil and rust must be removed. Fit a
mechanical filter at the entry of every heat exchanger.
Failure to install a mechanical filter can allow solid
particles and/or welding burrs to get inside the
exchanger. We recommend installing a filter with a
filtering mesh with holes not larger than 1.1mm in
diameter.
The manufacturer cannot be held responsible for any
damage to the exchangers if the mechanical filters are
not installed.
Water treatment
Before putting the unit into operation, clean the water
circuit. Dirt, scale, debris and other material can
accumulate inside the heat exchanger and reduce both
its heat exchanging capacity and the flow of the water.
Correct water treatment can reduce the risk of
corrosion, erosion, scale formation, etc. The most
suitable treatment must be selected depending on the
place of installation, considering the water system and
the characteristics of the water.
The manufacturer is not responsible for any damage or
malfunctions of the equipment.
The quality of the water must comply with the
specifications listed in the following table.
The water pressure must not exceed the
maximum operating pressure for the unit.
NOTE - Include adequate protection systems in the
water circuit to make sure that the pressure of the water
never exceeds the maximum limit allowed.
Water flow and volume
G EWAQ~G SS
model
Minimum water
flow
l/s
Maximum
water flow
l/s
EWAQ075G-SS
2.16
4.32
EWAQ085G-SS
2.40
4.80
EWAQ100G-SS
2.76
5.52
EWAQ110G-SS
3.06
6.12
EWAQ120G-SS
3.36
6.72
EWAQ140G-SS
4.02
8.04
EWAQ155G-SS
4.44
8.88
Circulati
ng water
Water
supply
Possible
problems
Items to be checked
pH at 25°C
6.8~8.0
6.8~8.0
Corrosion
+ limescale
Electrical
conductivity
[mS/m] at 25°C
<40
<30
Corrosion
+ limescale
Chloride ions
[mg Cl˜/l]
<50
<50
Corrosion
Sulphate ions
[mg SO4²˜/l]
<50
<50
Corrosion
Alkalinity M
(pH4.8)
[mg CaCO3/l]
<50
<50
Limescale
Total hardness
[mg CaCO3/l]
<70
<70
Limescale
Calcium
hardness
[mg CaCO3/l]
<50
<50
Limescale
Silicon ions
[mg SiO2/l]
<30
<30
Limescale
Elements of reference
Iron
[mg Fe/l]
<1.0
<0.3
Corrosion
+
limescale
Copper
[mg Cu/l]
<1.0
<0.1
Corrosion
Sulphur ions
[mg S²˜/l]
Not
detectabl
e
Not
detectabl
e
Corrosion
Ammonium ions
[mg NH4+/l]
<1.0
<0.1
Corrosion
Remaining
Chloride
[mg Cl/l]
<0.3
<0.3
Corrosion
Free Carbide
[mg CO2/l]
<4.0
<4.0
Corrosion
Index of stability
-
-
Corrosion
+ limescale
8 8
9

D-EIMAC01207-15EN - 12/22
G EWAQ~G SR
model
Minimum water
flow
l/s
Maximum
water flow
l/s
EWAQ075G-SR
1.98
3.96
EWAQ085G-SR
2.28
4.56
EWAQ100G-SR
2.64
5.28
EWAQ110G-SR
2.88
5.76
EWAQ120G-SR
3.12
6.24
EWAQ140G-SR
3.72
7.44
EWAQ155G-SR
4.14
8.28
EWAQ~G XS
model
EWAQ080G-XS
2.28
4.56
EWAQ090G-XS
2.58
5.16
EWAQ105G-XS
3.00
6.00
EWAQ115G-XS
3.36
6.72
EWAQ130G-XS
3.78
7.56
EWAQ150G-XS
4.26
8.52
EWAQ~G XR
model
EWAQ080G-XR
2.16
4.32
EWAQ090G-XR
2.46
4.92
EWAQ105G-XR
2.88
5.76
EWAQ115G-XR
3.18
6.36
EWAQ130G-XR
3.60
7.20
EWAQ150G-XR
4.02
8.04
To ensure correct operation of the unit, the flow of water
in the evaporator must fall within the operating sphere
specified in the preceding table and there must be a
minimum volume of water in the system.
The distribution circuits of the cold water should have a
minimum content of water to avoid an excessive
number of start-up and shut-downs of the compressor.
Every time the compressor goes into operation, an
excessive amount of oil from the compressor starts
circulating in the refrigerant circuit and at the same time
there is an increase of the temperature of the
compressor stator, generated by the inrush current of
the start-up. Therefore, to avoid damage to the
compressors, the application of a device has been
planned to limit frequent shut-downs and start-ups: in
one hour, there will only be 6 start-ups of the
compressor.
The system where the unit is installed must therefore
ensure that the overall content of water allows the unit
to operate continuously and therefore offers greater
environmental comfort. The minimum water content per
unit must be calculated approximately using the
following formula:
For 2 compressor units:
M (litres) = (12.153 x DT (°C) –22.168) x P(kW)
Where:
M = minimum content of water per unit expressed in
litres
P = refrigerating capacity of the unit express in kW
ΔT = difference in temperature of the incoming and
outgoing water, expressed in °C.
This formula is valid with the standard parameters of
the microprocessor. To determine most accurately the
quantity of water, we recommend contacting the
designer of the system.
Anti-freeze protection for evaporators and recovery
exchangers
When the entire system of the cooling installation is
being designed, two or more of the following anti-freeze
protection methods should be considered at the same
time:
1. Continuous circulation of water flow inside the
exchangers
2. Additional heat insulation and heating of exposed
piping
3. Emptying and cleaning the heat exchanger when it
is not in use and its maintenance in an anti-oxidant
atmosphere (nitrogen).
As an alternative, it is possible to add an
appropriate amount of glycol (antifreeze) to the
water circuit.
The installer and/or local personnel in charge of
maintenance, must make sure that anti-freeze
protection methods are in use and ensure that the
appropriate maintenance operations of the antifreeze
protection devices are always carried out. Failing to
follow the instructions above could result in damage to
the unit. Damage caused by freezing is not covered by
the guarantee.
Electrical system General specifications
The units must be connected to a TN power supply
system.
If the units must be connected to a different type of
power system, for example the IT system, please
contact the factory.
All the electrical connections to the unit must
be carried out in compliance with national laws
and European directives and regulations in
force.
All installation, running and maintenance activities must
be carried out by qualified personnel.
Refer to the specific wiring diagram for the unit
purchased. Should the wiring diagram not be on the unit
or should it have been lost, please contact the
manufacturer's representative who will send you a
copy.
In the event of any discrepancies between what is
written on the wiring diagram and a visual check of the
electric wires of the command and control panel,
contact the manufacturer representative.
Use only copper conductors to avoid overheating or
corrosion in the connection points, with resulting risk of
damage to the unit.
To avoid interference, all the command and control
cables must be connected separately from the power
cables, using more than one cable duct for this
purpose.
Before carrying out servicing work on the unit, close the
general disconnection switch located on the main power
supply.
WARNING: If the unit is off but the disconnection switch
is in the open position, the circuits not being used are
still live.
Never open the compressor terminal board without first
having disconnected the unit main switch.

D-EIMAC01207-15EN - 13/22
Simultaneous mono and three-phase loads and any
imbalance between phases can cause leakage to earth
of up to 150mA during the normal unit operations.
The protection systems for the power supply must be
designed based on the values mentioned above.
Wiring at the installation site
Wiring operations at the installation site and on
other components must be performed by an authorised
technician and must comply with current relevant
national and European laws.
On-site wiring must be carried out in compliance with
the wiring diagram supplied with the machine and the
instructions listed below.
Use a dedicated electric circuit. Never use a power
supply shared with other equipment.
NOTE - Check all the operations listed below on the
wiring diagram in order to better understand how the
equipment works.
Component table:
F1, 2 Main appliance fuses
L1, 2, 3 Main power supply terminals
PE Main earth terminal
FS Flow Switch
Q10 Main insulator switch
--- On-site wiring
Electric circuit and wiring requirements
1. The power supply to the unit must be prepared
so that it can be turned on and off
independently from that of other system
components or other appliances in general.
2. Create an electrical circuit for connecting the
unit. This circuit must have protective and
safety devices fitted i.e. a main switch and a
fuse for each phase where required by
legislative requirements in the country of
installation as well as an earth leakage
detector.
Turn off the main insulator switch before
making any connections (turn off the switch, remove or
disable the fuses).
Connection of the unit power supply
Using suitable cable, connect the power circuit to
terminals L1, L2 and L3 on the electric panel.
WARNING: Never twist, pull or apply weight to the
main switch terminals. The power supply cables
must be supported by adequate systems.
The wires connected to the switch must comply with the
insulation distance and the distance of surface
insulation between the active conductors and the earth,
in accordance with IEC 61439-1, Table 1 and 2 and
local national laws.
The cables connected to the main switch must be
tightening using a torque wrench and complying with
the unified tightening values relative to the quality of the
screws of the washers and the nuts used.
Connect the earth wire (yellow/green) to the PE earth
terminal.
The cross section of the protective equipotential
conductor (earth conductor) must comply with Table 1
of EN 60204-1 below.
Cross-sectional area of
copper phase
conductors supplying
the equipment
Smm2
Minimum cross-
sectional area of the
external protective
copper conductor
Sp mm2
S≤ 16
16 < S≤ 35
S> 35
S
16
S/2
In any event, the protective equipotential conductor
(earth conductor) must have a cross section of no less
than 10 mm2, in compliance with Point 8.2.8 of the
same standard.
Interconnecting wires
The unit cannot operate without a flow of water
thanks to the flow switch However, for extra safety a
water pump status contact must be fitted in series with
the contact(s) of the flow switch(es) to prevent the unit
operating without the pump.
If the unit is operated with no flow of water very severe
damage can occur (evaporator freezing).
Clean contacts
The controller is fitted with various clean indicator
contacts These contacts can be wired as shown in
the wiring diagram. The maximum current allowed is
2 A.
Remote inputs
In addition to the clean contacts, it is also possible
to install remote inputs. For installation consult the
wiring diagram.
Before start-up
The unit must be started for the first time by
DAIKIN authorised personnel ONLY.
The unit must absolutely not be started, even for a very
short period of time, without having checked it in minute
detail filling out the following list at the same time.

D-EIMAC01207-15EN - 14/22
Checks to be performed before starting
the unit
1
Check for exterior damage
2
Open all the closing valves
3
Make sure that all the parts of the unit are
pressurised with refrigerant (evaporator,
air condenser , compressors) before
connecting it to the hydraulic circuit.
4
Upstream of the unit, install a main
switch, main fuses and, where required
by legislative requirements in the country
of installation, an earth leakage detector.
To select these components, consult the
information on the unit ID plate and the
relative technical catalogue.
5
Connect the main voltage and check that it
falls within the limits allowed of ±10%
compared to the classification listed on the
ID plate.
The main power supply must be
arranged so that it can be turned on or off
independently from that of other parts of
the system or other appliances in general.
Check the wiring diagram, terminals L1,
L2, L3 and PE.
6
Install the water filter kit(s) (also when
not supplied) at the inputs to the
exchangers.
7
Supply water to the exchangers and make
sure that the flow falls within the limits
shown in the table in the "Load, flow and
quality of the water" section.
8
The pipes must be completely flushed
out. See also the chapter "Preparing,
checking and connecting the water circuit".
9
Connect the pump contact(s) in series
with the contact of the flow meter(s) so
that the unit can only be activated when
the water pumps are operating and the
flow of water is sufficient.
10
Check the oil level in the compressors.
11
Check that all the water sensors are
fastened correctly to the heat exchanger
(also see the label applied to the heat
exchanger).
NOTE - Before starting the unit:
- read the operating manual which comes supplied
with the unit. It will help you better understand how
the appliance and electronic controller work;
- close the doors on the electrical panel.
Open the isolation and/or shut off valves
Before start-up, make sure that all the isolation and/or
switch off valves are completely open.
User responsibilities
It is essential that the user is properly trained and
becomes familiar with the system before operating the
unit. In addition to reading this manual, the user must
study the microprocessor operating manual and the
wiring diagram in order to understand the start-up
sequence, operation, shutdown sequence and
operation of all the safety devices.
The user must keep a log (unit booklet) of the operating
data of the unit installed and of all periodical
maintenance and service activities.
If the operator notes abnormal or unusual operating
conditions, he or she must consult the authorised
manufacturer's technical service.
Periodical maintenance
The periodical maintenance activities (minimum), are
listed in the specific table of this manual.
Service and limited guarantee
All the units are tested at the factory and guaranteed for
a specific period of time.
These units have been developed and constructed
according to high quality standards to provide years of
problem-free operation. It is however important to
ensure proper and periodical maintenance in
accordance with all the procedures listed in this manual
and with good practice of machine maintenance.
We strongly recommend taking a maintenance contract
with a service authorised by the manufacturer. The
experience and skill of the personnel can ensure
efficient operation without problems over time.
The unit must be covered by a suitable
maintenance program from the time it is installed
and not just from the start-up date.
Keep in mind that operating the unit in an inappropriate
manner, beyond its operating limits or not performing
proper maintenance according to this manual will void
the guarantee.
Observe the following points in particular, in order to
comply with the guarantee:
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 voltage must not have
an imbalance between the phases greater than 2% in
accordance with EN 60204-1:2006 (Chapter 4-
Paragraph 4.3.2).
4. In the event of electrical problems, the unit must
remain off until the problem has been solved.
5. Do not disable or cancel the safety devices, whether
mechanical, electrical or electronic.
6. 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 evaporator inlet.

D-EIMAC01207-15EN - 15/22
7. Unless specifically agreed at the time of order, the
flow of water of the evaporator must never exceed
120% or be below 80% of the nominal capacity and in
any case within the limits shown in this manual.
Mandatory periodical checks and start-up of Groups
(units)
These Groups (units) are included in category II and III
of the classification established by European Directive
PED 97/23/EC.
For Groups belonging to this category, various national
laws call for a periodical control by an authorised
organisation. We recommend you contact such an
organisation to also request authorisation for start-up.
Table 5 - Periodic maintenance programme
List of Activities
Weekly
Monthly
(Note 1)
Annually /
Seasonally
(Note 2)
General:
Collecting operational data (Note 3)
X
Visual inspection of machine for any damage and/or loosening
X
Verification of thermal insulation integrity
X
Clean and paint where necessary (Note 4)
X
Water analysis
X
Check flow switch operation
X
Electrics:
Check start-up sequence
X
Check wear on contacts –Replace if necessary
X
Check the that all electrical terminals are tight –Tighten if necessary
X
Clean the inside of the electrical panel (Note 4)
X
Clean the ventilation filters on the electrical panel (Note 4)
X
Visual inspection of components for any signs of overheating
X
Check operation of compressor and electrical resistance
X
Use a Megger to test the insulation of the compressor motor
X
Refrigerant circuit:
Carry out a refrigerant leak test
X
Check the refrigerant level through the inspection port –level full
X
Check for a load loss in filter dryer (where present)
X
Analyse the compressor vibrations
X
Check the safety valve (Note 5)
X
Heat exchangers:
Check that the heat exchangers are clean (Note 6)
X
Notes
1) Monthly activities include all weekly ones
2) Annual activities (or start of the season) include all weekly and monthly ones
3) The unit's operating values should be measured on a daily basis for more thorough monitoring
4) If a unit is installed in an "aggressive" environment, this activity should be carried out once a month.
The following are considered "aggressive" environments:
- Environments with a high concentrations of industrial waste gases in the atmosphere:
- Environments near the sea (salty air);
- Environments near the desert with the risk of sandstorms;
- Other aggressive environments.
5) Safety valve
Check that the cap and seal have not been tampered with.
Check that the safety valve outlet has not been accidentally blocked by foreign objects rust or ice.
Check the date of manufacture on the safety valve and replace it as required by current national legislative requirements.
6) Clean the water heat exchangers. Particles and fibres can block heat exchangers. An increase in water flow or a drop
in thermal efficiency indicates that the heat exchangers are blocked.
Clean the air heat exchanger cooling fins. If a unit is installed in an environment where there is a high concentration of
particles in the air, the condenser may need to be cleaned often.
Bleeding refrigerant gas from the safety valve
Do not bleed refrigerant gas from the safety valve at the
installation site.
If necessary, the valve can be fitted with bleed hoses
whose cross section and length comply with national
legislative requirements and European Directives.

D-EIMAC01207-15EN - 16/22
Important information regarding the refrigerant used
This product contains fluorinated greenhouse gases.
Do not release the refrigerant gas into the atmosphere.
Refrigerant type: R410A
GWP value: 2087.5
(1) GWP = Global Warming Potential
The amount of refrigerant needed for standard
operation is indicated on the unit ID plate.
The actual quantity of refrigerant contained in the unit is
listed on a silver plate inside the electrical panel.
Depending on national or European legislative
requirements periodical inspections may be required to
check for potential refrigerant leaks. Please contact
your local dealer for more information.
Product lifespan
Our products have a lifespan of 10 (ten) years.
Disposal
The unit is made of metal, plastic and electronic
components. All these components must be disposed of
in accordance with relevant current national and
European legislative requirements.
Lead batteries must be collected and sent to specific
waste collection centres.
Oil must be collected and sent to specific waste
collection centres.
This manual is a technical support document and is not legally binding. The completeness, accuracy and reliability of this manual cannot be implicitly or
explicitly guaranteed. All the data and specifications contained herein are liable to change without notice. Information communicated at the time of order will
be deemed definitive.
The manufacturer will not accept any responsibility for direct or indirect damage, in the widest sense of the term, deriving from or associated with use
and/or interpretation of this manual.
We reserve the right to make design and structural changes at any time without giving notice. As a result, the image on the cover of the manual is not
binding.

D-EIMAC01207-15EN - 17/22
Figure 5 –Unit wiring in installation site
Legend
AI
Analogue Inputs
A.R.
Remote ON / OFF
M/S TS
Main/Secondary Temperature Sensor
M/S BC
Main/Secondary Connection Box
D.L.
Request Limit
DI
Digital Inputs
DO
Digital Outputs
DSP
Double Setting Point
EF
External failure
EFS
Evaporator flow switch
GA
General Alarm
KPE-1
Pump 1 water evaporator
KPE-2
Pump 2 water evaporator
S.O.
Setting Off
1
Very Low Voltage Monitor (OP15A)

D-EIMAC01207-15EN - 18/22
A
Typical refrigerant circuit –The number of compressors and water inlet and outlet are indicative. Please refer to the machine dimensional diagrams for exact water connections.

D-EIMAC01207-15EN - 19/22
B
Typical refrigerant circuit with partial heat recovery –The number of compressors and water inlet and outlet are indicative. Please refer to the machine dimensional diagrams
for exact water connections.

D-EIMAC01207-15EN - 20/22
C
Typical refrigerant circuit with total heat recovery –The number of compressors and water inlet and outlet are indicative. Please refer to the machine dimensional diagrams for
exact water connections.