TESY EVHP Series User manual

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DOMESTIC HOT WATER HEAT PUMP
Type: EVHP 7S 260 60; EVHP 7S 200 60; EVHP 260 60; EVHP 200 60

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1 INTRODUCTION ...............................................................3co
1.1. TESY PRODUCTS..........................................................3
1.2. DISCLAIMER...................................................................3
1.3. COPYRIGHT....................................................................3
1.4. OPERATING PRINCIPLE ……..……………………….....3
1.5. AVAILABLE VERSIONS AND CONFIGURATIONS…...4
2. HANDLING AND TRANSPORT ....................................... 4
3. CONSTRUCTION CHARACTERISTICS.......................... 6
3.1. TECHNICAL CHARACTERISTICS ................................. 7
4. IMPORTANT INFORMATION.......................................... 8
4.1. CONFORMITY WITH EUROPEAN REGULATIONS8
4.2. DEGREES OF PROTECTION PROVIDED
BY ENCLOSURES........................................................ 8
4.3.LIMITATIONS OF USE..................................................... 8
4.4.OPERATING LIMITS........................................................ 8
4.5.FUNDAMENTAL SAFETY RULES……............................ 8
4.6.INFORMATION ON COOLANT USED ............................ 8
5. INSTALLATION AND CONNECTIONS ...........................8
5.1.PREPARATION OF THE INSTALLATION SITE……........8
5.2.VENTILATION CONNECTION .........................................9
5.2.1.Particular installation conditions ...................................10
5.3.DEVICE MOUNTING AND CONNECTION ....................10
5.4.WATER SUPPLY CONNECTIONS ............................... 10
5.4.1.Condense drain connections ....................................... 11
5.5.SOLAR POWER SYSTEM INTEGRATION ...................12
5.6.ELECTRICAL CONNECTIONS ..................................... 12
5.6.1.Remote links ................................................................12
5.7.WIRING DIAGRAM .........................................................13
6. COMMISSIONING ......................................................... 14
7. OPERATION AND USE ................................................ 15
7.1. THE USER INTERFACE .............................................. 15
7.1.1.Interface keys and display .......................................... 15
7.1.2.Operating logic ............................................................ 16
7.1.3.Basic management...................................................... 16
7.2.PARTICULAR OPERATIONS......................................... 21
8. MAINTENANCE AND CLEANING................................. 24
8.1.RESETTING OF SAFETY EQUIPMENT .........................24
8.2.QUARTERLY INSPECTIONS .........................................24
8.3.ANNUAL INSPECTIONS .................................................24
8.4.CLEANING OF THE VENTILATION FILTER ..................24
8.5.MAGNESIUM ANODES ..................................................25
8.6.EMPTYING THE BOILER................................................25
9. TROUBLESHOOTING ....................................................25
10. DISPOSAL ..................................................................... 26
11. GUARANTEE.................................................................. 26
11.1. GUARANTEE............................................................... 26
11.2. CONDITIONS............................................................... 26
11.3. EXCLUSIONS AND LIMITATIONS.............................. 27
11.4. LEGAL RIGHTS RESERVED ..................................... 27
12. LIST OF TECHNICAL ASSISTANCE CENTRES .........27

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1. INTRODUCTION
This installation and maintenance manual is to be
considered an integral part of the TESY heat pump
(hereafter referred to as equipment).
The manual must be kept for future reference until the
heat pump itself has been dismantled. This manual is
intended for both the specialized installer (installers –
maintenance technicians) as well as the end user. The
installation modes to be complied with in order to achieve
a correct and safe operation of the equipment as well as
methods of use and maintenance are described in this
manual.
In case of the sale of the equipment or the change of
owner, the manual must accompany the equipment to its
new destination.
Before installing and/or using the equipment, read this
instruction manual carefully and, in particular, chapter 4
relating to safety.
The manual must be kept together with the equipment
and, in any case, it must always be at the disposal of the
qualified personnel in charge of installation and
maintenance.
The following symbols are used inside the manual in
order to rapidly find the most important information:
Information on safety
Procedures to follow
Information/ Suggestions
1.1. TESY products
Dear Customer,
Thank you for having purchased this product.
TESY, has always paid a great deal of attention to
environmental problems, therefore, it has used
technologies and materials with a low environmental
impact to manufacture its products in conformity with
RAEE –ROHS (2002/95/CE and 2003/108/CE)
community standards.
1.2. Disclaimer
The conformity of the content of these user instructions
with hardware and software has been submitted to
thorough verification. Regardless of this, it is still possible
for some non-compliance to occur; therefore, no liability
will be assumed for complete conformity.
In the interest of achieving technical perfection, we
reserve the right to carry out modifications to the
equipment construction or to data at any time whatsoever.
Therefore we do not accept any liability claims
whatsoever attributable to instructions, figures, drawings
or descriptions, without prejudice to errors of any kind.
TESY shall not be held responsible for damages
attributable to misuse, improper use, or as a consequence
of unauthorized repairs or modifications.
WARNING!: The equipment can be used
by children of at least 8 years of age as
well as by people with reduced physical,
sensory or mental abilities or by those
who lack the necessary experience or
knowledge, as long as they are
supervised or after they have received
instructions relating to the safe use of
the equipment as well as explanations
relating to the use of such equipment.
Children must not play with the
equipment. Cleaning and maintenance
intended to be carried out by the user
must not be performed by unsupervised
children.
1.3. Copyright
These user instructions contain information protected by
copyright. It is forbidden to photocopy, duplicate, translate
or record these user instructions on memory equipment,
either in whole or in part without prior authorization of
TESY. Any breaches shall be subject to the payment of
compensation for any damage caused. All rights are
reserved, including those deriving from the issuing of
patents or the registration of utility models.
1.4. Operating principle
The equipment belonging to the EVHP series is capable
of producing domestic hot water mainly by using heat
pump technology. A heat pump is capable of
transferring thermal energy from a low temperature
source to another with a higher temperature and vice
versa (heat exchangers).
The equipment uses a water circuit consisting of a
compressor, an evaporator, a condenser and a throttle
valve; a liquid/gas coolant flows inside this circuit (see
paragraph 4.6).
The compressor creates a difference in pressure inside
the circuit that allows a thermodynamic cycle to be
obtained: this sucks the coolant fluid in through an
evaporator, where the fluid itself evaporates at a low
pressure by absorbing heat; it is compressed and driven
towards the condenser where the fluid condenses at a
high pressure releasing the absorbed heat. After the
condenser, the fluid passes through the so-called “throttle
valve” and by losing pressure and the temperature starts
to vaporize, it re-enters the evaporator and the cycle
starts all over again.

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The operating principle of the equipment is as follows (Fig.
1):
I-II: The coolant fluid sucked in by the compressor flows
inside the evaporator and while it evaporates, it absorbs
the “ecological” heat given by the air.
At the same time, the ambient air is sucked in by the
equipment by a fan; the air loses it heat by
passing over the finned-tube battery of the evaporator;
II-III: The coolant gas passes inside the compressor and it
under goes an increase in pressure that causes a rise in
temperature; transforming this into superheated steam;
III-IV: Inside the condenser, the coolant gas releases its
heat to the water inside the tank (boiler). This exchange
process makes it possible for the coolant to pass from
superheated steam to a liquid state by condensing at a
constant pressure and undergoing a reduction in
temperature;
IV-I: The liquid coolant passes through the throttle valve, it
undergoes a sudden drop in both pressure and
temperature and it partially vaporises bringing pressure
and temperature back to the initial conditions. The
thermodynamic cycle can begin.
1.5. Available versions and configurations
The heat pump is available in two different versions, in
relation to the thermal power (EVHP and EVHP S
versions). Each version, in turn, can be set up in different
configurations, depending on the possible integrations
with other heating sources (e.g. solar thermal, biomass
power, etc.).
Version
Configuration description
EVHP 200
260
Air source heat pump for the production
of domestic hot water
EVHP
7S 200
7S 260
Air source heat pump for the production
of domestic hot water suitable for use
with the solar power system.
EVHP
7/5 S2 260
Air source heat pump for the production
of domestic hot water suitable for use
with another heating source (e.g.
biomass power).
2 TRANSPORT AND HANDLING
The equipment is supplied in a cardboard box. It is
fastened to a pallet with three screws.
Use a fork-lift truck or a pallet truck in order to unload
the equipment: it is opportune for these to have a load
capacity of at least 250 Kg.
In order to make it
easier to loosen the
fixing screws the
packaged
equipment may be put
in a horizontal position
on its back side.
The unpacking
operations must be
carried out carefully so
as not to
damage the equipment
enclosure if this is
carried out with knives
or cutters to open the
cardboard packaging.
After having removed
the packaging, make sure that the unit is intact. If in
doubt, do not use the equipment and seek help from
authorized technical staff.
In conformity with environmental protection regulations,
make sure that all the accessories supplied have been
removed before discarding the packaging.
WARNING! Packaging items (staples,
cardboard boxed, etc.) must not be left
within the reach of children as they are
dangerous.
(*) Note: at the manufacturer’s discretion, the type of
packaging may be subject to change.

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For the entire period in which the equipment remains idle,
waiting to be used, it is opportune to protect it from
atmospheric agents.
Positions permitted for transporting and handling:
WARNING! During the product handling
and installation stages, it is forbidden to
put the upper part of the device under any
kind of stress whatsoever due to the fact
that it is not of a structural nature.
WARNING! the equipment can be
transported horizontally only during the
last km according to what indicated
above (see “Positions permitted for
transporting and handling”) and taking
care of positioning some supports on the
lower side of the boiler in order not to
lean against the upper part, which is not
of a structural nature. When the
equipment is transported horizontally,
the display must be oriented toward the
upper side.
Positions that are not permitted for
transporting and handling purposes:
√
√

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3 CONSTRUCTION CHARACTERISTIC
1
Heat pump.
2
Control panel.
3
Enclosure in embossed ABS.
4
Steel tank (boiler) with double enamelling
(capacity: 160; 200; 260 litres).
5
Upper boiler probe.
6
Lower boiler probe.
7
Coolant recharge.
8
Ambient air recirculation fan.
9
Throttle valve.
10
High-efficiency finned evaporator. The
quantity of fluid put into this is regulated by an
appropriate thermostatic valve.
11
Air inlet (∅160 mm).
12
Air outlet (∅160 mm).
13
Hermetically-sealed rotary compressor.
14
Replaceable magnesium anode.
15
(1.5 kW –230 W) Electric heating element
16
Condenser pump discharge line.
17
Condenser return.
18
Replaceable magnesium anode.
19
Hot water outlet connection joint (G 1”).
20
Recirculation fitting (G ¾”).
21
Inlet, coil fitting for solar thermal power system
(G 1”1/4; 1 m2exchange surface).
22
Condensates drain (G 1/2”).
23
Outlet, coil fitting for solar thermal power sys-
tem (G 1”1/4; 1 m2surface).
24
Cold water inlet connection joint (G 1”).
25
50 mm polyurethane insulation.
26
Automatic resetting safety pressure switch.
27
Coil fitting for auxiliary heat source (G 1”1/4;
0.6 m2 surface)- Inlet
28
Coil fitting for auxiliary heat source (G 1”1/4;
0.6 m2 surface)- Outlet
29
Air inlet filter.
1
6
2
5
4
3
29
13
8
18
25
24
16
14
15
22
19
23
20
21
17
28
27
12
10
11
7
9
26

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Descriptions
EVHP
7S 260 60
EVHP
260 60
EVHP
7S 200 60
EVHP
200 60
COPDHW (1)
W/W
3.6
3.6
3.3
3.3
COPDHW (2)
3.1
3.1
3.0
3.0
HP thermal poweryield
kW
1.82
1.82
1.82
1.82
Total thermal power
kW
3.4
3.4
3.4
3.4
Heating time (2)
h:m
10:14
10:14
7:39
7:39
Heating time in BOOST mode (2)
h:m
05:06
05:06
3:58
3:58
Heat losses 65°C (3)
kWh/24h
1.6
1.6
1.4
1.4
Electrical data
Power supply
V
1/N/230
Frequency
Hz
50
Degree of protection
IPX4
HP maximum absorption
kW
0.53
Average absorption
kW
0.43
Heating element + HP maximum
absorption
kW
2.03
Electric heating element power
kW
1.5
Maximum current in HP
A
2.4
Required overload protections
A
16A T fuse/ 16A automatic switch, characteristic C (to be expected
during installation on power supply systems)
Internal protection
Single safety thermostat with manual reset on a resistive element
Operating conditions
Min.÷ max temperature heat pump air
intake (90% R.H.)
°C
-7÷38
Min. ÷ max temperature installation
site
°C
5÷38
Working temperature
HP Maximum settable temperature -
ECO cycle
°C
56
Maximum settable temperature in an
AUTOMATIC cycle
°C
70
Compressor
Rotary
Compressor protection
Thermal circuit breaker with automatic reset
thermodynamic circuit protection type
Safety pressure switch with automatic reset
Fan
Centrifugal
Ejection outlet diameter
mm
160
Revolutions per minute
rpm
1650÷2100
Nominal air capacity
m3/h
350÷500
Max. pressure head available
Pa
200
Motor protection
Internal thermal circuit breaker with automatic reset
Condenser
Wrapped externally, not in contact with water
Coolant
R134a
Load
g
900
Water storage
Water storage capacity
l
260
260
200
200
Max. quantity of hot water that can be
used Vmax (4)
l
342
342
276
276
Coil for connection to solar thermal
power system
m2
0.75 m2
N/A
0.75 m2
N/A
Coil for connection to an auxiliary
heating source
m2
N/A
N/A
N/A
N/A
Cathodic protection
2 x Mg anode Ø32x260 mm
Insulation
50 mm rigid PU
Defrosting
Active with Hot gas valve
Transport weight
Kg
115
98
99
95
Sound power Lw(A) (5)
dB(A)
59
Automatic anti-Legionnella
disinfection cycle (6)
YES
Maximum working pressure
Bar
7
(1) temperature of incoming air supply 15°C, R.H. 87%, temperature of boiler storage environment 15°C, water heated from
10°C to 55°C, (according to UNI EN 16147-2011)
(2) temperature of incoming air supply 7°C R.H. 87%, temperature of boiler storage environment 20°C, water heated from 10°C
to 55°C, (according to UNI EN 16147-2011)
(3) measurements carried out according to UNI EN 12897-2006
(4) measurements carried out according to UNI EN 16147-2011
(5) measurements carried out according to EN ISO 3471-2010
(6) Automatic activation every 30 days of operation

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4. IMPORTANT INFORMATION
4.1 Conformity with European regulations
The EVHP heat pump is a device intended for domestic
use in conformity with the following European directives:
•2012/19/UE Directive on general product safety;
•2011/65/RoHS Directive on the restrictions of use of
certain hazardous substances in electric and
electronic equipment (RoHS);
•Directive 2003/108/CE - Hazardous substances in
electric and electronic equipment (RAEE);
•Directive 2004/108/CE - Electromagnetic
compatibility (EMC);
•Directive 2006/95/CE –Low Voltage Directive (LVD).
4.2 Degrees of protection provided by enclosures
The degree of protection of the equipment is equal to:
IPX4.
4.3 Limitations of use
WARNING!: This device has not been
designed, nor is it intended for use
within hazardous environments (due to
the presence of potentially explosive
atmospheres –according to ATEX
standards or with a requested IP level
exceeding that of the equipment) or in
applications that require (fault-tolerant,
fail-safe) safety characteristics such as
in circuit-breaking systems and/or
technologies or in any other context in
which the malfunctioning of an
application could cause death or injury
to people or animals or serious damage
could be caused to objects or the
environment.
N.B.: In the event of a product
breakdown or fault, this could cause
damage (to people, animals and goods).
It is necessary to arrange for a separate
functional monitoring system with
alarm functions in order to avoid such
damage being caused. Moreover, it is
necessary to arrange for a back-up
service in case of failure!
4.4 Operating limits
The above mentioned device is intended to be used
exclusively for the heating of domestic hot water within the
foreseen limitations of use (paragraph 3.1).
The equipment can only be installed and started up for the
intended use within closed heating systems in conformity
with the EN 12828 standard.
N.B.: The manufacturer shall not be
held responsible under any
circumstances in the event that the
equipment is used for other purposes
than for which it has been designed and
as regards any installation errors or
equipment misuse.
WARNING! It is forbidden to use the
device for purposes other than those
intended. Any other use is to be
considered improper and therefore not
allowed.
N.B.: During the design and
construction stage of the systems,
current local rules and provisions are
complied with.
4.5 Fundamental safety rules
•The device must be used by adults;
•Do not open or disassemble the device when this is
connected to the power supply;
•Do not touch the device with wet or humid body parts
when barefoot;
•Do not pour or spray the device with water;
•Do not stand, sit and/or rest anything on the device.
4.6 Information on coolant used
This device contains fluorinated greenhouse gas included
in the Kyoto protocol. Do not discard such gas into the
environment.
Coolant type: HFC-R134a.
5. INSTALATION AND CONNECTION
WARNING! Installation, commissioning
and maintenance of the device must be
performed by qualified and authorised
personnel. Do not attempt to install the
device yourself.
5.1 Preparation of the installation site
The installation of the device must be carried out in a
suitable place in order to allow the normal use and
adjustment operations, together with ordinary and
extraordinary maintenance to be performed. Therefore it is
important to allow for the necessary working space by
referring to the dimensions
Shown in Fig. 2.

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X1
X2
X3
Y1
650 mm
650 mm
200 mm
300 mm
Moreover, the premises must:
•Have adequate water and power supply lines;
•Be available and ready for connection to the
condense drain;
•Be available and ready with adequate discharge pipes
in case of damage caused to the boiler or actuation of
the safety valve or breakage of pipes/connections;
•Have containment systems in case of serious water
leaks;
•Be sufficiently lit (where appropriate);
•Not measure less than 20 m3;
•Be frost-proof and dry.
WARNING! In order to avoid the
propagation of mechanical vibrations,
do not install the equipment on floor
slabs with wooden beams (e.g. in lofts).
5.2 Ventilation connection
Apart from the space indicated in paragraph 5.1, the heat
pump requires adequate ventilation.
It is necessary to create a dedicated air duct as indicated
in the following illustration (Fig. 3).
Moreover, it is important to ensure an adequate ventilation
of the premises where the equipment is to be installed.
An alternative solution is indicated in the following
illustration (Fig. 4): this consists of a second duct that
draws air in from outside instead of directly from inside the
premises.
Carry out the installation of each air duct taking care that:
•The weight of such does not adversely affect the
equipment itself;
•Maintenance operations can be carried out;
•This is adequately protected so as to avoid the
accidental intrusion of material inside the equipment
itself;
•The maximum total allowable pressure drop for all
components, including through holes for mounting on
external wall, within the pipe system does not exceed
200 Pa.
During operation, the heat pump tends to
lower the ambient temperature if the external
air duct is not carried out.
An appropriate protection grid must be
installed in line with the discharge pipe
conveying air to the outside with the aim of
avoiding foreign bodies from entering the
equipment. In order to guarantee
maximum device performance, the grid
chosen must ensure low pressure loss.
In order to avoid the formation of condensate:
insulate the air discharge pipes and the air
duct cover connections with steam-tight
thermal cladding of an adequate thickness.
If it is considered necessary in order to
prevent flow noise, sound mufflers can be
mounted.
Fit the pipes, the wall through holes and the
connections to the heat pump with vibration
damping systems.

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WARNING! the simultaneous operation
of an open-flue firebox (e.g. an open-
flue fireplace) together with the heat
pump causes a dangerous
environmental pressure drop. This
could cause the backflow of exhaust
gas into the environment itself.
Do not operate the heat pump together
with an open-flue firebox.
Use only sealed-chamber fireboxes
(approved) with a separate duct for
combustion air.
Keep the doors to the boiler room
closed and hermetically sealed if they
do not have a combustion air supply in
common with inhabited areas.
5.2.1 Particular installation conditions
One of the peculiarities of the heat pump heating system
is represented by the fact that these units cause a
considerable reduction of the air temperature that is
generally ejected from inside the home. Apart from being
colder than the ambient air, the exhaust air is also
completely dehumidified; for this reason, it is possible to
allow the air to flow back into the home in order to cool
specific environments or rooms during the summer.
Installation consists of the splitting of the discharge pipe to
which two shutters are applied (“A” and”) with the aim of
directing the air flow either towards the outside or the
inside of the home (Fig. 5b).
5.3 Device mounting and connection
The device must be installed on a stable, flat floor surface
that is not subject to vibration.
Fig.6 –Overall dimensions
Dimenssions [±5mm]
260 60
200 60
a [mm]
2004
1700
b [mm]
1286
981
c [mm]
1039
734
d [mm]
839
769
e [mm]
588
588
f [mm]
544
544
g [mm]
287
287
h [mm]
202
202
i [mm]
1286
1000
j [mm]
931
716
k [mm]
287
287
R [mm]
2025
1751
ØD [mm]
650
650
ØDF [mm]
160
160
M [mm]
380
380
5.4 Water supply connections
Connect the cold water inlet and the outlet pipes to the
appropriate connection points
The table below shows the characteristics of the
connection points.
CW - cold water inlet - G1"
HW - hot water outlet - G1"
IS - solar flow - G1"
OS - solar return - G1"
TS - thermosensor - G 1/2"
R - recirculation - G 3/4"
EE - opening for electrical element - G 11/2
V1,2 - Mg anodes - G11/4

Page 11 of 28
The following illustration (Fig. 7) shows an example of a
water supply connection.
N.B.: It is compulsory to install a
dirt filter on the cold water inlet pipe. The
trary, when the water hardness is
particularly high (higher than 25°F), it is
recommended to use a water softener,
properly calibrated and monitored; in this
case the residual hardness should not fall
below 15°F.
PLEASE NOTE!: It is advisable for the system
installer to install a 7-bar safety valve on the
cold water intake pipe (Fig. 8a).
N.B.: The safety equipment for protection
against over pressure must be op- erated
regularly in order to remove limescale
deposits and to check that it is not blocked
(Fig. 8a)
N.B.: For a proper installation of the
equipment, a hydraulic safety group in
accordance to UNI EN 1487:2002 standard
should be provided. It should include at
least: a shut-off valve, a check valve, a
control device of the check valve, a safety
valve, a device to interrupt the water load
(Fig. 8a)
N.B.: The drain pipe connected to the
equipment for protection against over
pressure must be installed sloping
continuously downwards and in a place
where it is protected against the formation of
ice (Fig. 8a)
WARNING!: in case an expansion vessel is
not being installed, make sure that in the
cold water intake there is not any non-return
valve installed.
WARNING!: The heat pump for the pro
duction of domestic hot water is capable of
heating water up to more than 60°C. For this
reason, as a protection against burns, it is
necessary to install an automatic thermostat
mixing equipment to the hot waterpipe (Fig.
5.4.1 Condense drain connections
Condensate that forms during the operation of the heat
pump flows through an appropriate discharge pipe (G 1/2”)
that passes inside cladding and it comes out on the side of
the equipment. This must be connected to a duct via a
siphon so that the condensate can flow freely (Fig. 8 or Fig.
9).

Page 12 of 28
5.5 Solar power system integration
The following illustration (Fig. 10) shows an example of
solar power system integration.
5.6 Electrical connections
The device is supplied already wired for the mains power
supply. It is powered through a flexible cable and a
socket/plug combination (Fig. 11 and Fig. 12).An earthed
Schuko socket with separate protection is needed for the
connection to the mains power supply.
5.6.1. Remote links
The equipment is designed to be connected to other
remote energy systems (photovoltaic and solar thermal
power systems).
The user interface has two digital inputs with the following
functions:
Digital 2: Input from photovoltaic system. The
“Green” function is enabled when a free contact is
established between terminals 31 and 32 (cable:
white/green). This function exploits any
overproduction of electricity and it increases the
temperature of the water in the storage tank until it
reaches the temperature set by the user (70°C default
temperature);
Digital 1: Input from the solar thermal power system.
The heat pump operation is disabled for a set time
when a free contact is established between terminals
30 and 31 (cable: brown/yellow) The cycle has the
purpose of optimizing the performance of the solar
thermal power system.
WARNING! The power supply to
which the equipment will be
connected must be protected by
an adequate residual current
circuit breaker.
The type of residual current
circuit breaker must be chosen
by evaluating the type of electric
equipment to be used on the
entire system.
With reference to the connection
to the mains power supply and
the safety equipment (e.g.
residual current circuit breaker)
comply with standard IEC 60364-
4-41.
Fig. 11 –A Schuko socket
Fig. 12 –Equipment plug

Page 13 of 28
5.6.1.1 Remote link mode
As regards links to digital inputs, the equipment is provided
with an additional 4-core cable that has already been
linked to circuit board of the user interface (placed inside
the equipment Fig. 15). The remote links to any energy
systems must be carried out by a qualified installer
(junction boxes, terminals and connection cables).
The following illustrations show an example of a remote
link (fig. 13 and fig. 14a)
To access the 4-core cable for remote connection it is
necessary to remove the upper cover of the boiler (see
paragraph 8.1 Fig. 108), and take the cable outside
through the dedicated opening, that is already present on
the back cover, as indicated in Fig. 54.
5.7. Wiring diagram

Page 14 of 28
6. COMMISSIONING
WARNING! Check that the equipment is
connected to the earth cable.
WARNING! Check that the line voltage
corresponds to that indicated on the
equipment identification plate.
The commissioning procedure must be carried out by
performing the following procedures:
•Fill the boiler by acting on the water inlet tap and
check that there are no leaks from gaskets and
connections. Tighten the bolts or connections where
necessary;
•Do not exceed the maximum permitted pressure
indicated in the “general technical data” section;
•Check that the water circuit safety equipment is
working;
•Connect the plug to the power socket;
•When the plug is inserted, the boiler is in standby, the
display remains switched off, the power key is
illuminated;
•Press the power key (see paragraph 7.1.3.1), the
equipment starts up in the “ECO” mode (default
setting) 5 minutes after pressing the key.

Page 15 of 28
7. OPERATING MODE.
The management of the device is assigned to a user
interface that enables the: •Setting of the operating mode;
•Modification of the operating parameters;
•Display and management of any emergency
situations;
•Verification of the state of resources.
Below, the term “start” intends the switching
from the Stand-by to the ON status; the term
“switch off” intends the switching from
the ON to the Stand-by status.
Below, the term “advanced procedure” refers to
particular procedures of the tool described in the
paragraphs relating to “advanced
management”.
7.1 The USER INTERFACE
The user interface (Fig. 15) allows the verification and the
adjustment of the equipment operation. This is equipped
with a display and the following keys: •On/Stand-by key;
•SET key;
•DOWN key;
•UP key.
7.1.1 Interface keys and display
7.1.1.1 The ON/Stand-by key
By means of this key it is possible:
•To switch the device on (ON status);
•To switch the device to the Stand-by status (in this
status, the instrument can automatically switch on in
certain time slots and independently enable the anti-
Legionella and defrosting functions.
When the equipment is switched on, it shows
the status it was in when it was previously
switched off.
7.1.1.2 The [SET]key
By means of this key it is possible to:
•Confirm set choices or values.
7.1.1.3 The [UP]key
By means of this key it is possible to:
•Scroll up the list of the various parameters;
•Increase the value of a parameter.
7.1.1.4 The [DOWN]key
By means of this key it is possible to:
•Scroll down the list of the various parameters;
•Reduce the value of a parameter.
7.1.1.5 The Interface Display
The interface display (Fig. 16) makes it possible to
visualize:
•Regulation temperatures;
•Alarm/Error codes;
•Status messages;
•Operating parameters.
Fig. 16 –User interface display
Compressor
LED
If this is lit: the compressor is
active.
It this is flashing:
•The compressor
switching on procedure
is in progress.
•The modification of
the operating set points
is in progress;
Defrosting
LED
If this is lit: defrosting is in
progress
MF LED
If this is lit: the electric
heating element is on
Fan LED
If this is lit: the fan is active
Maintenance
LED
If this is lit: maintenance of
the air filter is required (if
present)
Alarm LED
If this is lit: check the list of
alarms and follow the
procedure indicated in this
manual
Degree
Celsius LED
If this is lit: the unit of
measurement for
temperatures is the degree
Celsius
Fig. 15 –User interface
ON/Stand-by key
SET key
DOWN
key
UP key
Display

Page 16 of 28
Degree Fahr-
enheit LED
If this is lit: The unit of
measurement for
temperatures is the degree
Fahrenheit.
On/stand-by
LED
If this is lit: the equipment is
in the stand-by status.
If it is flashing, the equipment
has been switched on/off
manually during a switching
on/off period in a certain
timeslot.
Not used
7.1.2 Operating logic
7.1.2.1 Operating modes
The equipment foresees the following operating modes:
•AUTOMATIC operating mode
This mode mainly uses the renewable energy of the
heat pump as a support measure, the electric heating
elements can be enabled; these latter heating
sources are enabled if the water temperature is below
a certain level, or in the event that a temperature
exceeding
62°C is required;
•ECONOMY operating mode
This mode uses only the renewable energy of the
heat pump without ever enabling the electric heating
elements. It takes longer to enable but it has
considerable energy saving characteristics;
•OVERBOOST operating mode
This mode makes it possible to heat water rapidly by
using both the heat pump and the electric heating
elements. This function can be manually enabled
when the temperature of the water inside the storage
tank is below 40°C. At the end of the heating process,
the function is automatically disabled and the
equipment is automatically restored to the Automatic
or Economy mode depending on which of these
functions was previously set by the user;
•ANTI-LEGIONELLA operating
mode
This function is used as an anti-bacterial treatment by
increasing the temperature of the water to 70°C. This
function is periodically and, in any case, automatically
enabled every 30days, regardless of the operating
mode enabled;
•DEFROSTING mode
This function is necessary in order to eliminate the
frost deposits that form and which prevent heat
transmission. This function is automatically enabled
when the equipment is operated at low
environmental temperatures.
When the equipment is switched on for the
first time, it is pre-set by the manufacturer in
the ECO (Economy) mode with a water set
point of 55°C with the aim of guaranteeing the
best possible energy saving function with the
support of only renewable energy sources.
Please note that the use of such function
guarantees the user an average energy
saving of approx. 70% when compared to a
normal electric boiler.
7.1.3 Basic management
7.1.3.1 Manual switching on /off of the equipment
•Keep the key pressed for 1 second: the
on/stand-by LED will switch off/on.
•The equipment can be switched on/off also in
certain timeslots; the parameters HOn and HOF can
be seen (paragraph 7.1.3.4).
Manual switching on/off always has the
priority over the timeslot operating mode.
If the keyboard has been locked (paragraph
7.1.3.3) or an advanced procedure is in
progress, it will not be possible to carry out
the normal switching on/off of the equipment.
Every time the equipment is switched on, a
series of internal inspections are carried out
before the heat pump is enabled. Such
condition is reported by means of the flashing
of the compressor indicator light . Once the
verification period has passed (approx. 5
minutes) the indicator light remains lit and this
indicates that the unit is switched on.
7.1.3.2 Change of operating mode (AUTO-MATIC,
ECONOMY and OVERBOOST)
7.1.3.2.1 AUTOMATIC operating mode
To manually start the AUTOMATIC mode, carry out the
following procedure:
•Make sure that the keyboard is not locked
(paragraph 7.1.3.3) and that no other advanced
procedure is in progress;
•Press per the key for 1 second, “Auto” starts
to flash;
•Press the key again to confirm and start the
AUTOMATIC operating mode.
To exit the procedure:
•Press the key to exit this procedure without
changing the mode.

Page 17 of 28
7.1.3.2.2 ECO (economy) operating mode
To manually start the ECO operating mode, carry out the
following procedure:
•Make sure that the keyboard is not locked
(paragraph 7.1.3.3), that no other advanced
procedure is in progress and that the equipment is
not in the Overboost operating mode;
•Press the key for 1 second, “ECO” starts to
flash;
•Press the key again to confirm and start the
ECONOMY operating mode.
To exit the procedure:
•Press the key to exit this procedure without
changing the mode.
7.1.3.2.3 OVERBOOST operating mode
To manually start the OVERBOOST operating mode,
carry out the following procedure:
•Make sure that the keyboard is not locked
(paragraph7.1.3.3) and that no other advanced
procedure is in progress;
•Press the key for 1 second, either “ECO” or
“Auto” starts to flash;
•Press the keys until “ObSt” flashes
on the display;
•Press the key again to confirm and start the
OVERBOOST operating mode.
To exit the procedure:
•Press the key to exit this procedure without
changing the mode.
7.1.3.3 Keyboard locking/unlocking
To lock the keyboard, carry out the following procedure:
•Make sure that no other advanced procedure is
in progress;
•Keep the and the keys pressed for 1
second: “Loc” will be shown on the display for 1
second.
If the keyboard is locked, it will not be possible to carry
out any kind of operation on the display interface.
By pressing any key, “Loc” will be shown for 1
second on the display.
To unlock the keyboard:
•Keep the and the keys pressed for 1
second: “UnL” will be shown for 1 second on the
display.
7.1.3.4 Temperature setting in the ECO operating
mode (SP1)
•Make sure that the keyboard is not locked
(paragraph 7.1.3.3) and that no other advanced
procedure is in progress;
•Press and release the key: “SP1” will be
shown on the display;
•Press and release the key: the compressor
LED will flash;
•Press either the or the key within 15
seconds; parameters r3, r4 and r5 can be seen;
•Press and release the key or do not carry
out any other operations for 15 seconds: the
compressor LED will switch off;
•Press and release the key.
To exit the procedure before its completion:
Do not carry out any operations for 15 seconds (any
changes will be saved).
7.1.3.5 Temperature setting in the Automatic mode
(SP2)
•Make sure that the keyboard is not locked
(paragraph 7.1.3.3) and that no other advanced
procedure is in progress;
•Press and release the key: “SP1” will be
shown on the display;
•Press either the or the key until “SP2”
is shown on the display;
•Press and release the key: the compressor
LED will flash;
•Press either the or the key within 15
seconds; parameters r1, r2 and r5 can also be seen;
•Press and release the key or do not carry out
any other operations for 15 seconds: the compressor
LED ( ) will switch off;
•Press and release the key.
To exit the procedure before its completion:
•Do not carry out any operations for 15 seconds
(any changes will be saved).
7.1.3.6 Timeslot settings for the switching on/off of
the equipment
N.B.: before proceeding with the
timeslot settings, set day and real time
as described in paragraph 7.1.3.14
To start the procedure:
•Make sure that the keyboard is not blocked and
that no other advanced procedure is in progress;
•Press and release the key: “SP1” will be
shown on the display.
To set the first timeslot:
•Press and release either the or the key
within 15 seconds to select “HOn1” (first switching on
time) and/or “HOf1” (first switching off time); select
“HOn2” and “HOF2” for the second switching on/off
time;
•Press and release the key;
•Press and release either the or the key
and within 15 seconds;
•Press and release the key or do not carry out
any other operations for 15 seconds.
or

Page 18 of 28
To associate a time slot to a certain day of the week:
•After the previous procedure has been carried
out, press either the or the key and then let
it go within 15 seconds in order to select “Hd1”
(switch on time for day 1, or rather Monday) and/or
“Hd2...7” (switching on time for days 2-7, or rather
Tuesday-Sunday);
•Press and release the key;
•Press and release either the or the key
within 15 seconds in order to select “1” (the first
switch on/off time) or “2” (the second switch on/off
time);
•Press and release the key or do not carry
out any other operations for 15 seconds.
To exit the procedure before its completion:
•Do not carry out any operations for 15 seconds
(any changes will be saved) or press the key and
then let it go.
Carefully evaluate enabling of time slot operation
in order to avoid malfunctions caused
by users.
7.1.3.7 Display of the operating status
•Make sure that the keyboard is not locked
(paragraph 7.1.3.3) and that no other advanced
procedure is in progress;
•Press and release the key:
Auto/ECO/Obst/Anti will be displayed for 3 seconds
depending on the current active operative status.
7.1.3.8 Silencing of the alarm sound
To silence the alarm, carry out the following procedure:
•Make sure that no other advanced procedure is
in progress;
•Press any key once.
ADVANCED MANAGEMENT
N.B.: The following instructions are
reserved for specialised technical
assistance personnel.
7.1.3.9 Different operating mode start conditions
Each operating mode must comply with precise conditions
in order to be enabled:
•AUTOMATIC operating mode
The condition in order to enable the start of this
function is as follows: lower probe< SP2 –r0
(hysteresis);
•ECO operating mode
The condition in order to enable the start of this
function is as follows: lower probe< SP1 –r0
(hysteresis);
•OVERBOOST operating mode
The condition in order to enable the start of this
function is as follows: lower probe< SP3and upper
probe< SP3.Once a temperature exceeding SP3 has
been detected, the Overboost operating mode
terminates and the previously set operative mode is
restored.
7.1.3.10 The display
If the equipment is in the “ON” status, during normal
operation, the display will show the established
temperature by means of parameter P5:
•If P5 = 0, the display will show the temperature of
the upper part of the boiler;
•If P5 = 1, the display will show the active working
set point;
•If P5 = 2, the display will show the temperature of
the lower part of the boiler;
•If P5 = 3, the display will show the temperature of
the evaporator;
•If the equipment is in the “stand-by” status, the
display will be switched off.
7.1.3.11 Alarms
Note: in case of “UtL” alarm (fault of the fan), in
addition to the display visualization, the
equipment emits an acoustic signal that can be
switched off pressing any key on the controller.
The alarm it is never canceled unless the
equipment is switched off or put in stand-by.
The heat pump working mode is automatically
disabled and the one with electric resistance is
activated in order to ensure the continuity of the
warm water supply.
PLEASE NOTE!: in case of “UtL” alarm
it is necessary to contact the technical
assistance.

Page 19 of 28
When the cause of the alarm has been
removed, the normal operation of the
equipment is restored.
AL
Minimum temperature alarm
Solution:
-Check the temperature associated with the
alarm;
-Parameters displayed: A0, A1, A2 and A11.
Main consequences:
-The equipment will continue to work as nor-
mal
AH
Maximum temperature alarm
Solutions:
-Check the temperature associated with the
alarm;
-Parameters displayed: A3, A4, A5 and A11.
Main consequences:
-The equipment will continue to work as nor-
mal.
id
Digital input alarm
Solutions:
-Check the causes that originated the input
activation (possible short circuit in signal cables)
-See parameters: i0; i1 and i2; Main
consequences:
-Compressor will be switched off; - Defrosting
will not be activated.
iSd
Blocked equipment alarm
Solutions:
-Check the causes that originated the digital
input activation
-See parameters: i0; i1; 18 and i9
-Switch the equipment off and then back on
again or disconnect the equipment from the
mains power supply.
Main consequences:
-Compressor will be switched off;
-Defrosting will be never activated.
FiL
Ventilation filter check alarm
Solutions:
- Check how clean the filter is (to switch off the
alarm message, press any key on the display)
UtL
Probable fan fault
Solutions:
-See parameters SP10 and C14
-Check the fan conditions Main consequences:
-Compressor and fan are switched off;
-Water heating occurs using only the electric
resistance.
7.1.3.12 Error messages
Pr1
Error in probe in upper part of the boiler
Solutions:
-Check that the type of probe is in conformity
with parameter P0 settings;
-Check the probe is intact;
-Check the equipment-probe connection;
-Check the temperature of the upper part of the
boiler.
Main consequences:
-The equipment stops working.
Pr2
Error in probe in lower part of the boiler
Solutions:
-The same as the previous situation but
relating to the probe in the lower part of the
boiler.
Main consequences:
-The equipment stops working.
Pr3
Error in evaporator probe
Solutions:
-The same as the previous situation but
relating to the evaporator probe.
-The equipment stops working.
When the cause of the alarm has been
removed, the normal operation of the equipment
is restored.
7.1.3.13 Defrosting
Defrosting can be enabled in the following way:
•Automatically, when the temperature of the evaporator is
below that established in parameter d17 (only if P4
has a value other than
0);
In any case, between one defrosting procedure and
another, the compressor must have been left switched on
for a period either longer than or equal to d18 minutes.
Otherwise the request to enable the defrosting procedure
will not be accepted.
If P4 = 1, d2 represents the temperature of the evaporator,
above which the defrosting procedure is terminated. Vice
versa, if P4 = 0 or P4 = 2, parameter d2 is not taken into
consideration.
If during the defrosting procedure the evaporate or probe
is above the threshold set by means of parameters d2 and
P4 = 1, the request to enable the defrosting procedure is
not accepted.

Page 20 of 28
The defrosting procedure consists of three stages:
•Defrosting stage: Parameter d3 establishes the
maximum duration of the stage.
Output status:
-The compressor is active if d1 = 1,otherwise it is
switched off;
-The defrosting relay is active if d1 = 0 or d1 =
1,otherwise it is switched off;
-The fans are switched on if d1 = 2, otherwise
they are switched off.
•Dripping stage: Parameter d7 establishes the
duration of the stage.
Output status:
-The compressor is switched off;
-The defrosting relay is active if d1 = 0 or d1
= 1,otherwise it is switched off; -
The fans are switched off.
•Drying stage.
Parameter d16 establishes the duration of the stage.
Output status:
-The compressor acts according to parameter d8;
-The defrosting relay is active if d1 = 0 or d1
= 1,otherwise it is switched off; -
The fans are switched off.
If the “Anti-Legionella” or the “Overboost”
functions are in progress, the defrosting
procedure will not be enabled.
7.1.3.14 Day and real time settings
•Make sure that the keyboard is not locked
(paragraph 7.1.3.3) and that no other advanced
procedure is in progress;
•Press and release the key: the display will
show the first code available;
•Press and release either the or the key
until “rtc” is shown;
The day is displayed as 1...7 (number 1 corresponding to
Monday). To change the day of the week:
•Press and release the key: the display will
show “dd” followed by the two numbers representing
the day;
•Press and release either the or the key
within 15 seconds.
To change the time:
•Press and release the key while changing
the day of the month: the display will show “hh”
followed by the two numbers representing the time
(Time is shown in the 24 hr. format);
•Press and release either the or the key
within 15 seconds.
To change the minutes:
•Press and release the key while changing
the time: the display will show “nn” followed by the
two numbers representing the minutes;
•Press and release either the or the key
within 15 seconds;
•Press and release the key or do not carry
out any operations for 15 seconds; To exit the
procedure:
•Press and release the key until the display
shows the temperature established by parameter P5
or do not carry out any operations for 60 seconds.
Alternatively:
•Press and release the key.
To set operations within timeslots, it is
necessary to have carried out the settings
relating to the day and the real time before-
hand.
7.1.3.15 Configuration parameter settings
To carry out the procedure:
•Make sure that the keyboard is not locked
(paragraph 7.1.3.3) and that no other advanced
procedure is in progress;
•Keep the and the keys pressed for 4
seconds: the display will show “PA” (password); •
Press and release the key;
•Press and release either the or the key
within 15 seconds to set “-19” on the display;
•Press and release the key or do not carry
out any other operations for 15 seconds;
•Keep the and the keys pressed for 4
seconds: the display will show the first parameter
“SP1”.
To select a parameter:
•Press and release either the or the key.
To change a parameter:
•Press and release the key;
•Press either the or the key to either
increase or reduce the parameter value (within 15
seconds);
•Press and release the key or do not carry
out any operations for 15 seconds.
To exit the procedure:
•Keep the and the keys pressed for 4
seconds or do not carry out any operations for 60
seconds (any changes will be saved).
Switch the equipment off and then back on
again to make the changes made to the
parameters effective.
7.1.3.16 Restoring default factory settings
To carry out the procedure:
•Ensure that the keyboard is not locked
(paragraph 7.1.3.3) and that no other advanced
procedure is in progress;
•Keep the and the keys pressed for 4
seconds: the display will show “PA” (password); •
Press and release the key;
•Press and release either the or the key
within 15 seconds to set “149”;
•Press and release the key or do not carry
out any operations for 15 seconds;
•Keep the and the pressed for 4
seconds: the display will show “dEF”;
•Press and release the key;
•Press and release either the or the
within 15 seconds to set “1”;
•Press and release the key or do not carry
out any other operations for 15 seconds: the display
will show “dEF” flashing for 4 seconds, after which the
equipment will exit the procedure;
•Disconnect the equipment from the mains power
supply.
To exit the procedure before its completion:
•Keep the and the key pressed for 4
seconds during the procedure (or rather before
setting “1”: the restoring of default factory settings will
not be carried out).