Daikin EKHHEU200CV37 Technical manual

EKHHEU200CV37
EKHHEU200PCV37
EKHHEU260CV37
EKHHEU260PCV37
User, Installations
and Maintenance Manual
UK version
Domestic Hot Water Heat Pump
Monobloc type

Page 2 User, Installations and Maintenance Manual
1. GENERAL SAFETY PRECAUTIONS ......................................................................................................................................................................3
1.1 SAFETY WARNINGS...................................................................................................................................................................................................3
1.2 INSTALLATION CAUTION ...........................................................................................................................................................................................3
1.3 INSTALLATION WARNINGS........................................................................................................................................................................................4
1.4 AERAULIC CONNECTIONS WARNINGS ...................................................................................................................................................................4
1.5 HYDRAULIC CONNECTIONS WARNINGS ................................................................................................................................................................5
1.6 ELECTRICAL CONNECTIONS WARNINGS ...............................................................................................................................................................5
1.7 SERVICING - MAINTENANCE - TROUBLESHOOTING WARNINGS ........................................................................................................................6
2. INTRODUCTION ........................................................................................................................................................................................................7
2.1 Products ......................................................................................................................................................................................................................7
2.2 Disclaimer.....................................................................................................................................................................................................................7
2.3 Language......................................................................................................................................................................................................................7
2.4 Copyright ......................................................................................................................................................................................................................8
2.5 Available versions and congurations ..........................................................................................................................................................................8
3. HANDLING AND TRANSPORT ...............................................................................................................................................................................8
3.1 Receipt .........................................................................................................................................................................................................................8
4. G3 KIT ACCESSORY ...............................................................................................................................................................................................9
5. CONSTRUCTION CHARACTERISTICS ...............................................................................................................................................................10
5.1 Dimensional data........................................................................................................................................................................................................11
5.2 Technical characteristics.............................................................................................................................................................................................12
6. IMPORTANT INFORMATION .................................................................................................................................................................................13
6.1 Compliance with European regulations......................................................................................................................................................................13
6.2 Casing protection rating .............................................................................................................................................................................................13
6.3 Operating limits...........................................................................................................................................................................................................13
6.4 Operating limits ..........................................................................................................................................................................................................13
6.5 Basic safety rules .......................................................................................................................................................................................................14
6.6 Information on the refrigerant used ...........................................................................................................................................................................14
7. INSTALLATION AND CONNECTIONS..................................................................................................................................................................14
7.1 Preparation of place of installation ............................................................................................................................................................................14
7.2 Securing to the oor ...................................................................................................................................................................................................15
7.3 Aeraulic connections ..................................................................................................................................................................................................15
7.4 Securing and connections of this appliance ...............................................................................................................................................................17
7.5 Hydraulic connections ...............................................................................................................................................................................................17
7.6 Connection the piping for domestic hot water ...........................................................................................................................................................17
7.7 Integration with solar thermal system (only for EKHHEU200PCV37 and EKHHEU260PCV37 models) ...................................................................20
7.8 Electrical connections ................................................................................................................................................................................................21
7.9 Wiring diagram ...........................................................................................................................................................................................................23
8. DESCRIPTION OF USER INTERFACE AND OPERATION OF EQUIPMENT...................................................................................................24
8.1 Turning the water heater on and o󰀨 and unlocking the buttons..................................................................................................................................25
8.2 Setting the clock .........................................................................................................................................................................................................25
8.3 Setting time bands......................................................................................................................................................................................................25
8.4 Setting the hot water set-point....................................................................................................................................................................................25
8.5 OPERATING MODE...................................................................................................................................................................................................26
8.6 ADDITIONAL FEATURES ..........................................................................................................................................................................................26
8.7 Faults/protection.........................................................................................................................................................................................................28
9. COMMISSIONING....................................................................................................................................................................................................29
9.1 Query, editing operating parameters ..........................................................................................................................................................................29
10. TROUBLESHOOTING.............................................................................................................................................................................................33
10.1 Power board fuse replacement...................................................................................................................................................................................34
10.2 Heating element safety thermostat reset....................................................................................................................................................................34
11. MAINTENANCE .......................................................................................................................................................................................................35
11.1 Sacricial anode check/replacement..........................................................................................................................................................................35
11.2 Emptyng the tank.......................................................................................................................................................................................................35
11.3 Tank internal inspection .............................................................................................................................................................................................35
12. DISPOSAL................................................................................................................................................................................................................36
13. PRODUCT SHEET...................................................................................................................................................................................................36
14. PERFORMANCE WITH THE SOLAR THERMAL SYSTEM (ONLY FOR MODS EKHHEU200PCV37 AND EKHHEU260PCV37)...............37
14.1 Solar coil uid: pure water ..........................................................................................................................................................................................37
14.2 Solar coil uid: mixture + propylene glycol 33% by volume........................................................................................................................................38
14.3 Solar coil uid: mixture + propylene glycol 45% by volume........................................................................................................................................39

Page 3User, Installations and Maintenance Manual
1. GENERAL SAFETY PRECAUTIONS
CAUTION:
• This manual is an integral part of the product. Keep it with care with the appliance, and
hand it on to the next user/owner in case of change of property.
• These instructions are also available from the manufacturer’s customer service and its
website: www.daikin.eu
• Read the instructions and warnings in this manual carefully, they contain important
information regarding safe installation, use and maintenance.
1.1 SAFETY WARNINGS
Do not use the appliance for any other than its specied use. The manufacturer is not liable for damage resulting
from improper or incorrect use or failure to observe the instructions given in this manual.
This appliance is not intended for use by persons (including children) whose physical, sensory or mental
capacities are reduced, or persons without experience or knowledge, unless they have been given instructions
and monitored previously when using the appliance by a person responsible for their safety.
Children must be supervised to ensure they do not play with the appliance.
This appliance may be used by children 8 years of age or older, and those with reduced physical, sensory or
mental capacity or lack of experience or knowledge, if they are properly supervised or if instructions for the safe
use of the appliance have been given to them and the risks involved are clear to them.
Children are not permitted to play with the appliance.
Water heated to over 50°C can cause immediate serious burns if delivered directly to the taps. Children, disabled
persons and the elderly are particularly at risk. It is recommended to install a thermostatic mixer valve on the
water delivery line.
This appliance must not be cleaned or maintained by children without supervision.
Do not touch the appliance when barefoot or if any part of your body is wet.
Do not leave ammable materials in contact with or in the vicinity of the appliance.
The appliance must be emptied when it is out of service in an area subject to subzero emperatures. Drain as
described in the appropriate chapter.
1.2 INSTALLATION CAUTION
The appliance must be installed and commissioned by a qualied technician in accordance with local legislation
and health and safety regulations. All power circuits must be shut o󰀨 before you open the terminal block.

Page 4 User, Installations and Maintenance Manual
Incorrect installation can result in damage to property and injury to persons and animals; the manufacturer is
not liable for the consequences.
This product is heavy, handle with care and install the product in a frost-free room.
Ensure that the oor can support the weight of the water lled appliance.
The destruction of the appliance by overpressure due to the blocking of the safety device inactivates the warranty.
1.3 INSTALLATION WARNINGS
When installing this product in a bathroom do not use the “Prohibited space” and respect, at least, the “Protected
space” listed as shown below:
Prohibited space Protected space
This product must be placed in an accessible location.
The water heater must be xed to the ground using the xing brackets provided for this purpose and adhesives
are not considered to be a reliable xing means.
This product is designed to be used at a maximum altitude of 2000 m.
Refer to description and illustrations in paragraphs “7.1 Preparation of place of installation" on page 14, “7.2
Securing to the oor" on page 15 and “7.4 Securing and connections of this appliance" on page 17.
1.4 AERAULIC CONNECTIONS WARNINGS
The simultaneous operation of an open-chamber hearth (e.g. open replace) and the heat pump
causes a dangerous negative pressure in the room. The negative pressure can cause the return of
exhaust gases into the room. Do not operate the heat pump together with an open-chamber hearth.
Only use sealed-chamber hearths (approved) with separate combustion air supply.
Seal the doors of boiler rooms that do not have the inow of combustion air in common with living areas.
A suitable protection grille must be installed both at the air intake and outtake connections to prevent any foreign
bodies from going inside the equipment.
Refer to description and illustrations in the “7.4 Securing and connections of this appliance" on page 17.

Page 5User, Installations and Maintenance Manual
1.5 HYDRAULIC CONNECTIONS WARNINGS
It is mandatory that the installation complies with part G3 of the Building Regulations. For that the unit is factory
equipped with a T/P safety relief valve (set = 90°C/7bar) and is supplied with a G3 kit composed by expansion
vessel, PRSV device to be installed at the water inlet of the unit and that integrates a check-valve, a water
pressure reducer (default set = 3,5bar), a water safety relief valve (set=6bar).
The outlet connection of both safety relief valves must be connected to a tundish. The discharge pipes from
safety devices (tundish) must be installed to fully comply with Part G3 of the Building Regulations (latest edition).
The minimum inlet water pressure for the correct operation of the appliance is 0.15 MPa (1.5 bar).
Connect a rubber pipe to the condensate drain, taking care not to force too much so as not to break the drain
pipe and refer to “7.6.1 Condensate drain connection" on page 20".
Use only connecting pipes (not supplied), rigid and resistant to electrolysis both at the inlet of cold water and at
the outlet of hot water from the device.
For models that incorporate a heat exchanger (solar coil), the circuit must not exceed 1.0 MPa (10 bar) and its
temperature must not exceed 80°C.
Refer to description and illustrations in the “7.5 Hydraulic connections" on page 17 and “7.7 Integration with
solar thermal system (only for EKHHEU200PCV37 and EKHHEU260PCV37 models)" on page 20.
1.6 ELECTRICAL CONNECTIONS WARNINGS
The appliance shall be installed in accordance with national wiring regulations.
The electrical installation must include an all-pole disconnection with a separation of the contacts on all poles
capable of guaranteeing complete disconnection in the overvoltage category III upstream of the appliance,
complying with local installation rules in force .
The device must be protected by an adequate di󰀨erential switch (max 30 mA). The type of di󰀨erential switch
should be selected by assessing the type of electrical devices used by the system as a whole.
Earth connection is mandatory. The manufacturer of the appliance shall not be held liable for any damage
caused by failure to earth the system or due to anomalies in the electric power supply.
It is strictly forbidden to connect the appliance at the AC mains through extensions or by a power strip.
Before taking o󰀨 the cover, make sure that the power is turned o󰀨 to prevent injury or electric shock.
Refer to description and illustrations, respectively, in the “7.8 Electrical connections" on page 21 and “7.9
Wiring diagram" on page 23.

Page 6 User, Installations and Maintenance Manual
1.7 SERVICING - MAINTENANCE - TROUBLESHOOTING WARNINGS
Any repairs, maintenance, plumbing and electrical connections must be done by qualied technicians using
original spare parts only. Failure to observe the above instructions can compromise the safety of the appliance
and relieves the manufacturer of any liability for the consequences.
To empty the appliance: turn o󰀨 the power supply and cold water, open the hot water taps and then operate the
drain valve of the safety device.
The pressure relief valve must be operated regularly to remove scale deposits and to ensure that it is not blocked.
The appliance is equipped with a supply cord that if damaged, must be replaced by the manufacturer, its service
agent or similarly qualied persons in order to avoid a hazard.
The appliance incorporates a time-Iag miniature fuse-link that if broken, it must be replaced with a fuse model
“T5AL250V” in accordance with IEC 60127.
Refer to description and illustrations, respectively, in the “10. TROUBLESHOOTING" on page 33 and “11.
MAINTENANCE" on page 35.

Page 7User, Installations and Maintenance Manual
2. INTRODUCTION
This installation and maintenance manual is an integral part of
the heat pump (hereinafter equipment).
The manual must be kept for future reference until dismantling.
It is intended for the specialist installer (installers - maintenance
technicians) and the end user. The manual describes the instal-
lation procedures to be observed for correct and safe operation
of the equipment, and the methods of use and maintenance.
In case of sale or transfer to another user, the manual must stay
with the unit.
Before installing and/or using the equipment, read this instruc-
tion manual carefully and in particular chapter 5 on safety.
The manual must be kept with the unit and always be available
to qualified installation and maintenance personnel.
The following symbols are used in the manual to highlight the
most important information:
Caution
Procedures to be followed
Information / Suggestions
2.1 Products
Dear Customer,
Thank you for purchasing this product.
Our company, always attentive to environmental issues, uses
low environmental impact technologies and materials for its
products, in compliance with EU WEEE standards (2012/19/EU
– RoHS 2011/65/EU).
This product complies with EN12897:2016 standard - Water
supply - Specification for indirectly heated unvented (closed)
storage water heaters.
2.2 Disclaimer
The conformity of these operating instructions with the hard-
ware and the software has been carefully checked. Neverthe-
less there may be differences; and no responsibility is assumed
for total conformity.
In the interest of technical improvement, we reserve the right to
make construction or technical data changes at any time. Any
claim based on indications, figures, drawings or descriptions is
therefore excluded. They are subject to possible errors.
The constructor declines any liability for damage due to com-
mand errors, improper or inappropriate use, or due to unauthor-
ized repairs or modifications.
2.3 Language
The manual was written in Italian (IT), the original language of
the manufacturer.
Any translations into additional languages must be made from
the original instructions.
The Manufacturer is held responsible for the information con-
tained in the original instructions; translations into different lan-
guages cannot be fully verified, therefore, if an inconsistency
is found, it is necessary to follow the original language text or
contact our Technical Documentation Office.

Page 8 User, Installations and Maintenance Manual
2.4 Copyright
These operating instructions contain information protected by
copyright. No part of these operating instructions may be pho-
tocopied, duplicated, translated or recorded on storage media
without prior permission from the supplier. Any violations will be
subject to compensation for damage. All rights, including those
resulting from the granting of patents or registration of utility
models, are reserved.
2.5 Available versions and congurations
This appliance incorporates a 1.9 kW heat-pump unit and can
be set up in different configurations, according to possible inte-
gration with additional heating sources (e.g. solar heating) or
depending on boiler capacity.
Version Configuration description
EKHHEU200CV37
EKHHEU260CV37
Air heat pump for domestic hot water (DHW) pro-
duction
EKHHEU200PCV37
EKHHEU260PCV37
Air heat pump for DHW production prearranged
for the solar thermal system.
EKUHWG3D24
MANDATORY OPTION: G3 kit 24l to comply
with UK building regulation
3. HANDLING AND TRANSPORT
The equipment comes in a cardboard box(*).
It is secured to a pallet by means of three screws.
For unloading operations use a forklift or an adequate pallet
truck.
The packed equipment can be placed horizontally and back
down to facilitate undoing the anchoring screws.
Unpacking must done carefully so as not to damage the equip-
ment casing if using knives or cutters to open the cardboard
packaging.
After removing the packaging, check the integrity of the unit. If
in doubt, do not use the unit; contact authorized technical per-
sonnel.
Before eliminating the packaging, according to the applicable
environmental protection regulations, make sure all the acces-
sories supplied have been removed.
(*) Note: The type of packaging may undergo variations at the
discretion of the manufacturer.
For the entire period the equipment remains idle, awaiting com-
missioning, it is advisable to put it in a place protected from
atmospheric agents
3.1 Receipt
In addition to the units, the packages contain accessories and
technical documentation for use and installation. Check that the
following are present:
• 1x user, installation and maintenance manual;
• 3x fastening brackets plus screws;
• 1x thermal cut-out (only for EKHHEU200PCV37 and
EKHHEU260PCV37).
For the entire period the equipment remains idle, awaiting com-
missioning, it is advisable to put it in a place protected from
atmospheric agents.
Positions allowed for transport and handling
fig. 1
ATTENTION! During the product handling and
installation phases the upper part must not be
stressed in any way, as it is not structural.

Page 9User, Installations and Maintenance Manual
ATTENTION! Horizontal transport is allowed only
for the last km according to that indicated (see
“Positions not allowed for transport and han-
dling”), making sure supports are positioned in
such a way at the bottom of the boiler so as not
to stress the upper part, as it is not structural.
During horizontal transport the display must
face upwards.
Position allowed only for the last km
Positions not allowed for transport and handling
fig. 2
4. G3 KIT ACCESSORY
It is mandatory that the installation complies with part G3 of the
Building Regulations. For that the unit is factory equipped with
a T/P safety relief valve (set = 90°C/7bar) and is supplied with a
G3 kit composed by:
a) 1x PRSV: Pressure reducing valve/pressure relief valve
combination (check valve, water pressure regulator de-
fault =3,5 bar, water pressure safety valve set=6bar), wa-
ter inlet and water outlet 22 mm connection, discharge pip-
ing connection 15 mm
b) 1x Adaptor (22 mm×3/4” Female BSP)
c) 1x Tee piece (22 mm×22 mm×22 mm)
d) 2x tundishes (15 mm inlet, 22 mm outlet)
e) Wall mounting set for expansion vessel
f) 1x expansion vessel 24 liters preset=3,5bar male connec-
tion 3/4" BSP
d
b
a
c
e
f
fig. 3
NOTE: All piping MUST be installed according to section
G3 of the Building Regulations.

Page 10 User, Installations and Maintenance Manual
5. CONSTRUCTION CHARACTERISTICS
29
fig. 4
28
1 Heat pump
2 User interface
3 Steel casing
4 Heating element
5 Magnesium anode
6 Ventilation air inlet (Ø 160 mm)
7 Ventilation air outlet (Ø 160 mm)
8 Cold water inlet connection Ø 1”G
9 Hot water outlet connection Ø 1”G
10 Prearrangement for recirculation Ø 3/4”G
11 Condensate drain Ø 1/2”G - Plastic outlet connection
12 Prearrangement for solar coil Inlet Ø 3/4”G
Only for models EKHHEU200PCV37
EKHHEU260PCV37
13 Prearrangement for solar coil outlet Ø 3/4”G
Only for models EKHHEU200PCV37
EKHHEU260PCV37
14 Steel tank with vitreous enamel coating according to DIN 4753-3
15 Condenser
16 Rotary compressor
17 Finned pack evaporator
18 Electronic fan
19 Boiler probes
20 Probe holder pocket for solar Ø int =6mm, L=90mm
Only for models EKHHEU200PCV37
EKHHEU260PCV37
21 Polyurethane insulation
22 Carrying handles
23 Tube for safety thermostat bulb
24 Power board
26 Compartment for accessing heating element and safety
thermostat bulb
28 Wiring diagram
29 T/P relief safety valve

Page 11User, Installations and Maintenance Manual
5.1 Dimensional data
F
fig. 5
11
5
29
9
26
10
20
12
13 8
22
G
B
I
fig. 6
380
Ø 160
Ø 160
Ø 620
628
R310
R388
fig. 7
MODEL
EKHHEU200PCV37 EKHHEU260PCV37 EKHHEU200CV37 EKHHEU260CV37
UM
A250 250 250 250 mm
B490 490 490 490 mm
C600 600 / / mm
D705 785 705 785 mm
E877 1162 877 1162 mm
F1142 1427 1142 1427 mm
G705 735 705 735 mm
H1607 1892 1607 1892 mm
I976 1261 976 1261 mm
Legend on previous page.

Page 12 User, Installations and Maintenance Manual
5.2 Technical characteristics
Models EKHHEU200CV37EKHHEU260CV37EKHHEU200PCV37EKHHEU260PCV37
U.m.
General data
Voltage supply 230Vac-50Hz-1PH -
Tank water content - Vnom 192 250 187 247 l
Maximum inlet water pressure 0,7 0,7 0,7 0,7 MPa
Empty weight 85 97 96 106 kg
Operating weight 277 347 283 353 kg
Dimensions (fxh) 621 x 1607 621 x 1892 621 x 1607 621 x 1892 mm
Max. Hot water temperature with heat pump 62 62 62 62 °C
Max. Hot water temperature with additional
electric heater 75 75 75 75 °C
Tank
Material
Enameled steel
-
Cathodic protection
Mg rod anode
-
Insulating type
Polyurethane -
Insulation thickness 50 50 50 50 mm
T/P relief safety valve 90 / 7 °C / bar
Heat pump electrical data
Average power input in heating 430 430 430 430 W
Maximum power input 530 530 530 530 W
Maximum current input 2,43 2,43 2,43 2,43 A
Electric heater electrical data
Supply voltage 230Vac-50Hz
Power input 1500 1500 1500 1500 W
Current input 6,5 6,5 6,5 6,5 A
Electrical data Heat pump +
electric heater
Maximum power input 1960 1960 1960 1960 W
Maximum current input 8,5 8,5 8,5 8,5 A
Air circuit
Fan type
Centrifugal -
Air volume ow rate 450 450 450 450 m3/h
Available external static pressure 117 117 117 117 Pa
Ducts diameter 160 160 160 160 mm
Refrigerant circuit
Compressor Rotary -
Refrigerant R134a -
Refrigerant charge 1 1 1 1 kg
Evaporator
Copper-aluminum finned coil -
Condenser
Aluminum tube wound outside tank -
Solar coil
Material - -
Enameled steel Enameled steel -
Surface - - 0,72 0,72 m2
Max pressure - - 1 1 MPa
Rated volume - - 3,5 3,5 l
Rated ow rate - - 15 15 l/min
Pressure drop - - 34 34 mbar
Data according to EN 16147:
2017 standard for AVERAGE
climate (unit in ECO mode,
Hot water setpoint = 55 ° C;
Inlet water = 10 ° C;
Inlet air temp = 7 ° C DB / 6
° C WB)
* according to European
regulation 812/2013
Load prole L XL L XL -
Water heating energy efciency class * A+ A+ A+ A+ -
Water heating energy efciency - hwh 135 138 135 138 %
COPDHW 3,23 3,37 3,23 3,37 -
Maximum volume of mixed water at 40 °C - V40 247 340 241 335 l
Reference hot water temperature - θ'wh 52,5 53,2 52,5 53,2 °C
Rated heat output - Prated 1,339 1,249 1,339 1,249 kW
Heating up time - th06:27 09:29 06:27 09:29 h:min
Annual electricity consumption - AEC 761 1210 761 1210 kWh
Stand-by power input (Pes) 26 28 26 28 W
Data according
to EN 12102-2: 2019 ECO
mode with Inlet air temp = 7
° C DB / 6 ° C WB
Indoor sound power level 53 51 53 51 dB(A)
Outdoor sound power level 45 44 45 44 dB(A)
Data according
to EN 12897: 2016
Hot water capacity - - 160,4 219,2
l
Standing heat loss 24 hours* 1,60 2,01 1,56 1,99 kWh/24h

Page 13User, Installations and Maintenance Manual
6. IMPORTANT INFORMATION
6.1 Compliance with European regulations
This heat pump is a product intended for domestic use in com-
pliance with the following European directives:
• Directive 2012/19/EU (WEEE)
• Directive 2011/65/EU on the restriction of the use of certain
hazardous substances in electrical and electronic equipment
(RoHS)
• Directive 2014/30/EU electromagnetic compatibility (EMC)
• Directive 2014/35/EU low voltage (LVD)
• Directive 2009/125/EC eco-friendly design
• Regulation 2017/1369/EU energy labeling
6.2 Casing protection rating
The equipment protection rating is: IP24.
6.3 Operating limits
PROHIBITION! This product is not designed or
intended for use in hazardous environments
(due to the presence of potentially explosive
atmospheres - ATEX or with required IP level
higher than that of the unit) or in applications
requiring safety features (fault-tolerant, fail-safe)
which may be systems and/or technologies to
support life or any other context in which the
malfunction of an application can lead to death
or injury to people or animals, or serious dam-
age to property or the environment.
NB!: If the possibility of a product fault or failure can
cause damage (to people, animals and property) it is nec-
essary to provide for a separate functional surveillance
system equipped with alarm functions in order to exclude
such damage. It is also necessary to arrange the replace-
ment operation!
Appliance is not designed for installation outdoors but in
a "closed" place not exposed to the elements.
6.4 Operating limits
The product in question is designed exclusively for heating hot
water for sanitary uses within the limits described below. For this
purpose, it must be connected to the domestic water supply and
the power supply (see chapter "7. INSTALLATION AND CON-
NECTIONS”).
6.4.1 Temperature range




















fig. 8- Chart
A = Inlet air temperature (°C)
B=Hot water temperature (°C)
= Operating range for heat pump (HP)
= Integration with heating element only
6.4.2 Water hardness
The unit must not operate with water of hardness under 12°F;
however, with particularly hard water (above 25°F), it is advis-
able to use a properly calibrated and monitored water softener,
in this case the residual hardness must not fall below 15°F.
NB!: In the design and construction phase of the plants,
the applicable local regulations and provisions must be
respected.

Page 14 User, Installations and Maintenance Manual
6.5 Basic safety rules
• The product must be used by adults;
• Do not open or disassemble the product when it is electrically
powered;
• Do not touch the product if barefoot or with wet or damp parts
of the body;
• Do not pour or spray water on the product;
• Do not climb, sit and/or place any type of object on the
product.
6.6 Information on the refrigerant used
This product contains fluorinated greenhouse gases included in
the Kyoto protocol. Do not release these gases into the atmo-
sphere.
Type of refrigerant: HFC-R134a.
NB!: Maintenance and disposal operations must only be
carried out by qualified personnel.
7. INSTALLATION AND CONNECTIONS
7.1 Preparation of place of installation
The product must be installed in a suitable place, i.e. to allow
normal use and adjustment operations as well as routine and
extraordinary maintenance.
The necessary operating space must therefore be prepared by
referring to the dimensions given in fig. 9 and fig. 10.
fig. 9- Minimum spaces



fig. 10- Minimum spaces
The room must also be:
• Equipped with adequate water and electricity supply lines;
• Prearranged for the condensation water discharge connec-
tion;
• Prearranged with adequate water drains in case of boiler
damage or safety valve intervention or the breakage of pipes/
connections;
• Equipped with possible containment systems in case of seri-
ous water leakage;
• Sufficiently illuminated (where required);
• Not less than 20 m3 in volume;
• Protected against frost and be dry.
ATTENTION! To avoid the propagation of me-
chanical vibrations, do not install the equipment
on oors with wooden beams (e.g. in the attic).

Page 15User, Installations and Maintenance Manual
7.2 Securing to the oor
To secure the product to the floor, fasten the supplied brackets
as shown in fig. 11.
fig. 11- Fastening brackets
Then secure the unit to the floor with the aid of suitable plugs,
not supplied, as shown in fig. 12.
fig. 12- Securing to the floor
7.3 Aeraulic connections
In addition to the spaces indicated in 7.1, the heat pump.re-
quires adequate air ventilation.
Create a dedicated air channel as indicated in fig. 13.
Mandatory air
inlet D.160 mm
Internal
compartment
Exterior
fig. 13- Example of air outlet connection
It is also important to ensure adequate ventilation of the room
containing the unit. An alternative solution is shown in the figure
below (fig. 14): it provides for a second ducting that takes air
from the outside instead of directly from the inside room.
Internal
compartment
Exterior
fig. 14– Example of air outlet connection

Page 16 User, Installations and Maintenance Manual
Install each air channel, making sure:
• It does not weigh down on the equipment.
• It allows maintenance operations.
• It is adequately protected to prevent the accidental intrusion
of materials inside the equipment.
• The connection to the outside must be done with suitable,
non-flammable piping.
• The total equivalent length of the extraction pipes plus the
delivery, including grilles, must not exceed 12 m.
The table gives the characteristic data of commercial ducting
components with reference to nominal air flows and diameters
160 mm.
Data Smooth
straight pipe
Smooth 90 °
curve Grille UM
Type
Effective
length 1 \ \ m
Equivalent
length 1 2 2 m
During operation, the heat pump tends to lower the room tem-
perature if the air ducting is not to the outside.
A suitable protection grille must be installed at the air extrac-
tion pipe to the outside to prevent any foreign bodies from
entering inside the equipment. To ensure maximum product
performance, the grille must be selected from those with low
pressure loss.
To avoid the formation of condensation water: insulate the air
extraction pipes and the ducted air cover connections with a
steam-tight thermal covering of adequate thickness.
Install silencers if deemed necessary to prevent noise due to
the flow. Equip the pipes, wall outlets and connections to the
heat pump with vibration-damping systems.
7.3.1 Special installation
One of the peculiarities of the heat pump heating systems is
that these units considerably lower the air temperature, gener-
ally expelled to the outside of the house. As well as being colder
than the ambient air, the expelled air is also completely dehu-
midified, therefore the air flow can be returned inside for the
summer cooling of specific rooms or areas.
Installation provides for splitting of the extraction pipe, which is
fitted with two dampers ("A" and "B") for directing the air flow to
the outside (fig. 16) or the inside of the house (fig. 15).
Mandatory air
inlet D.160 mm
Internal
compartment
Damper "A"
closed
Damper "B"
open
Internal compartment
Exterior
fig. 15- Example of installation in the summer period
Mandatory air
inlet D.160 mm
Internal
compartment
Damper "A"
open
Damper "B"
closed
Internal compartment
Exterior
fig. 16- Example of installation in the winter period

Page 17User, Installations and Maintenance Manual
7.4 Securing and connections of this appliance
The product must be installed on a stable, flat floor that is not
subject to vibrations.
7.5 Hydraulic connections
Connect the cold water supply line and the outlet line to the ap-
propriate connection points (fig. 17).
The table below gives the characteristics of the connection
points.
Ref. Function Hydraulic connection
8Cold water inlet 1”G
9Hot water outlet 1”G
10 Recirculation 3/4”G
11 Condensate drain 1/2”G
12 * Solar coil inlet 3/4”G
13 * Solar cᴓØoil outlet 3/4”G
20 * Socket for solar probe and
thermal cut-out bulb 1/2”G
29 T/P relief safety valve Ø 15mm
*: only for EKHHEU200PCV37 and EKHHEU260PCV37 mod-
els.
11
29 9
10
20
12
13 8
fig. 17
7.6 Connection the piping for domestic hot water
fd
b
c
d
a
≥300 mm
≥300 mm
≤600 mm
≤600 mm
29
D1
D2
D1
D2
fig. 18
29 - T/P safety relief valve (factory installed)
Components supplied with G3 kit (see “3.1 Receipt" on
page 8 ):
a) 1x PRSV: Pressure reducing valve/pressure relief valve
combination (check valve, water pressure regulator de-
fault =3,5 bar, water pressure safety valve set=6bar),
water inlet and water outlet 22 mm connection, dis-
charge piping connection 15 mm
b) 1x Adaptor (22 mm×3/4” Female BSP)
c) 1x Tee piece (22 mm×22 mm×22 mm)
d) 2x tundishes (15 mm inlet, 22 mm outlet)
e) wall mounting set for expansion vessel
f) 1x expansion vessel 24 liters preset=3,5bar male con-
nection 3/4" BSP
1) Pre-assemble the adaptor (b) and expansion vessel (f) so
that the expansion vessel is ready for installation.
fig. 19

Page 18 User, Installations and Maintenance Manual
2) Mount the expansion vessel (f) to the wall.
1 2
fig. 20
3) Fit the T-piece (c) to the domestic hot water cold water IN
pipe of the unit.
4) Connect the pressure reducing valve/pressure relief valve
combination (a) to the T-piece (c) with a length of copper tube
Ø22 mm (field supply).
5) Connect the expansion vessel (f) to the T-piece (c) with a
length of copper tube Ø22 mm (field supply).
6) Connect the pressure reducing valve/pressure relief valve
combination (a) to the water mains inlet.
7) Install the tundish (d) in a vertical position within a maximum
of 600 mm away from the pressure reducing valve/ pressure
relief valve combination.
ATTENTION! Install the tundish away from any
electrical device. Possible consequence: Electri-
cal shock or re.
NB!: To ensure a free water flow through the discharge
pipe, manually operate the pressure relief valve by turn-
ing its knob left.
8) Using the accessory brass compression coupler (part of the
T/P valve installed on the hot water tank), connect the discharge
pipe (
Ø 15mm ) to the T/P valve (29). Install the tundish (d) in a
vertical position within a maximum of 600 mm away from the
T/P valve.
9) Connect the 2 tundishes, supplied with the G3 kit, to an
appropriate drain according to the applicable legislation.
The following example shows discharge below fixed grat-
ing (Building Regulation G3 section 3.61 gives alternative
points of discharge):
≤600 mm
≥300 mm
a
D1
D2
c
b
d
fig. 21
aSafety device (pressure and temperature relief valve of do-
mestic hot water tank; pressure relief valve of domestic hot wa-
ter tank kit)
bTundish
c Fixed grating
dTrapped gully
D1 Metal discharge pipe from safety device to tundish
D2 Discharge pipe from tundish, with continuous fall. See Build-
ing Regulation G3 section 3.56, Table 03 and worked example.
10) After completing the installation, the installer has to fill out
the warning label on the tank with indelible ink.
WARNING TO USER
WARNING TO INSTALLER
Installed by:
a. Do not remove or adjust any component part of this unvented water heater; contact
the installer.
b. If this unvented water heater develops a fault, such as a flow of hot water from the
discharge pipe, switch the heater off and contact the installer.
a. This installation is subject to the Building Regulations.
b. Use only appropriate components for installation or maintenance.
Name ..............................................................................................................................................
Address ..........................................................................................................................................
Tel. No. ............................................................................................................................................
Completion date .............................................................................................................................
fig. 22
ATTENTION! The discharge pipes from the pres-
sure relief valves MUST terminate in a safe and
visible position without forming any risk to per-
sons in the vicinity.

Page 19User, Installations and Maintenance Manual
ATTENTION!
▪ Discharge piping, tundish, drain
valves, etc. MUST be positioned away
from any electrical components.
▪ The discharge pipe away from the tundish
MUST terminate in a safe, visible position with-
out forming any risk to persons in the vicinity.
ATTENTION!
▪ Do NOT install any valves between the domestic
hotwatertankandrelief valves/expansionvessel..
▪ Do NOT install shut-o󰀨 valves between the ex-
pansion relief valve and the domestic hot water
tank.
NB!:
All pipework and fittings must be flushed free of flux and
debris prior to installing the domestic hot water tank kit.
Failure to do this may cause irreparable damage to the tank
kit controls. Flush the system by opening the hot water tap.
▪ The tundish pipework must be a 22 mm metal pipe with
a minimal vertical length of 300 mm below the tundish
before any elbows or bends in the pipework. All pipework
must have a continuous fall of 1 in 200 thereafter. Maxi-
mum permitted (equivalent) length of 22 mm pipework is
9 m. Each bend or elbow is equivalent to 0.8 m of pipe-
work.
The following figures (fig. 23 - fig. 24) illustrate 3 examples of
hydraulic connection.
11 1110 15 12 1017
PRSV
>3°
9
5
OUT
IN
1
16
11
13 14
4
29
17 11
fig. 23 - Example of water system WITHOUT thermostatic mixing valve
5
16
11
18 11
17 17 17 29
4
11
OUT
11 1110 15 12 1017
PRSV
>3°
9
IN
1
13 14
fig. 24 - Example of water system WITH thermostatic mixing valve
Legend ( fig. 23 - fig. 24 )
1 Water inlet pipe
4 Ricirculation water inlet
5 Hot water outlet pipe
9 Inspectionable end of di-
scharge pipe
10 Pressure gauge
11 Shut-off valve
12 Pressure regulator
13 Shut-off valve
14 Expansion vessel
15 Drain tap
16 Recirculation pump
17 Check valve
18 Automatic thermostat mixing
equipment
29 T/p relief safety valve (factory
installed)
PRSV Pressure reducing valve/
pressure relief valve combi-
nation
- - - when the circulation pump is
working
NOTE: All piping MUST be installed according to section
G3 of the Building Regulations.

Page 20 User, Installations and Maintenance Manual
7.6.1 Condensate drain connection
The condensate forming during heat pump operation flows
through a special drain pipe (1/2"G) that passes inside the insu-
lating casing and comes out at the side of the equipment.
It must be connected, via a trap, to a duct so that the conden-
sate can flow regularly (fig. 25).
fig. 25- Examples of condensate drain connection via a trap
7.7 Integration with solar thermal system (only for
EKHHEU200PCV37 and EKHHEU260PCV37 models)
The following figure (fig. 26) shows how to connect the equip-
ment to a solar thermal system controlled by a dedicated elec-
tronic controller (not supplied) that has a "voltage-free contact"
type output to be connected to the DIG.1 input of the equipment
(see "7.8.1 Remote connections”).
To use the equipment in this configuration it is necessary to set
the parameter P16 = 1 (see par. 8.1).
fig. 26
The following figures (fig. 27 and fig. 28) show how to connect
the equipment to a solar thermal system controlled directly by
the latter, without the aid of a dedicated electronic controller.
In the configuration of fig. 27, in case of solar collector overtem-
perature a drain valve (not supplied) is activated to discharge in
a DHW storage tank (puffer) hot water contained in the equip-
ment.
In the configuration of fig. 28, however, in this condition the solar
collector shutter is closed.
In both cases this occurs in order to allow the collector to cool
down.