Cool Energy EcoSyn 100 Instruction manual

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INSTALLATION, OPERATION & MAINTENANCE MANUAL
EcoSyn 80 / 100

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WARNINGS!
Always transport the heat pump in an upright position; exceptionally, it may be
tilted by 35° in all directions. Be careful not to damage the housing or the vital
component parts of the heat pump during transport.
The heat pump is not intended for industrial use and use in premises where
corrosive and explosive substances are present.
The connection of the heat pump to the mains should be performed in
accordance with standards for electrical appliances. An double pole disconnect
switch should be installed between the heat pump and the mains in accordance
with the current wiring regulations.
The heat pump should not be in operation without water in the hot water tank,
because which could result in permanent damage!
The installation should be performed in accordance with all current
regulations and the instructions of the manufacturer. It should be performed by a
professionally trained competent person.
It is necessary to install a safety valve with a rated pressure of 0.6 MPa (6 bar) to
the inlet pipe of the heat pump, to prevent the pressure in the boiler from rising for
more than 0.1 MPa (1 bar).
Water may drip from the outlet opening of the safety valve, so the outlet opening
should be set to atmospheric pressure.
The outlet of the safety valve should be installed facing downwards and in a
non-freezing area.
To ensure proper functioning of the safety valve, the user should perform
regular controls to remove limescale and make sure the safety valve is not blocked.
Do not install a stop valve between the heat pump and the safety valve, because
it will impair the functioning of the safety valve!
Before the beginning of the operation two 90° elbows must be installed to the
top of the appliance (ø125 mm), each facing in the opposite direction. The premises
must be properly ventilated.
The elements in the electronic control unit are live even after pressing the off
field (9) on the heat pump.
If you disconnect the heat pump from the power supply, please drain any water
from the pump to prevent freezing.
Water can be drained from the pump through the water inlet pipe. For this
purpose, it is advisable to install a special element or outlet valve between the inlet
pipe and safety valve.
Please do not try to fix any defects of the heat pump on your own. Call the
nearest authorized service provider.
This product contains fluorinated greenhouse gases. Hermetically sealed.

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Our products incorporate components that are both environmentally safe
and harmless to health, so they can be disassembled as easily as possible
and recycled once they reach their final life stage.
Recycling of materials reduces the quantity of waste and the need for
production of raw materials (e.g. metals) which requires a substantial amount of
energy and causes release of harmful substances. Recycling procedures reduce the
consumption of natural resources, as the waste parts made of plastic and metal can
be returned to various production processes.
For more information on waste disposal, please visit your waste collection centre or
the store where the product was purchased.
INTRODUCTION
Dear Customer,
Thank you for purchasing this product. This heat pump for heating sanitary water is one of
the most advanced appliances in its class. Its material, design and testing were made in
compliance with related applicable standards.
Power, capacity and safety systems were thoroughly tested. Tests were made individually
for each component part, as well as for the finished product, according to international
quality standards.
Please read these Instructions for Installation and Use carefully before use in order to
prevent eventual problems that may cause damage to the product.
Keep this Manual for future reference, as a source of information on the details of the heat
pump operation or its maintenance.
Of course, you can always contact any of our experienced authorized servicing technicians
for occasional maintenance.

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USE
This unit is designed for production of sanitary water in households and at premises where
daily consumption of hot water (40 °C) does not exceed 150 l to 250 l. The appliance must
be connected to water supply mains and to the power supply grid. The air intake and air
exhaust may also be provided by designing the inlet and outlet drain from and to the
adjacent room.
In case of installing the unit in a room with a bathtub or shower tub, take into account the
requirements defined in the IEC 60364-7-701 standard (VDE 0100, Teil 701). To mount the
unit on the wall, use special wall bolts with a nominal diameter of minimum 8 mm and
always mount the unit in an upright position. Make sure the mounting location on the wall is
adequately reinforced if the wall is not strong enough. We recommend leaving enough
space between the floor and unit as to provide easy access to the Mg anode (for
maintenance or replacement purposes –Fig. 4). If not, the unit will need to be dismounted
from the wall before servicing.
The heat pump may not be used for purposes other than those defined in these
Instructions. The unit is not designed for industrial use or use in rooms where corrosive or
explosive substances are present.
The manufacturer shall not assume any liability for damages caused by incorrect
installation or misuse that are not in compliance with the Instructions for installation and
use.
The instructions for use are a component and important part of this product and must be
delivered to the customer. Read the warnings carefully, as they contain important
directions related to safety during operation, use and maintenance.
Keep these Instructions for later use.
The marking of the heat pump is stated on the nameplate located on the bottom side of the
unit, between both inlet pipes for sanitary water.
Once the packaging is removed, check the contents. When in doubt, contact your dealer.
Never let children play with the packaging parts (clamping, plastic bags, expanded
polystyrol, etc.) –potential risk. Make sure to remove and dispose of the packaging safely
and in an environmentally friendly way.
STORAGE AND TRANSPORT
Store the heat pump in an upright position, in a clean and dry place.

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A
B
C *
C **
D *
D **
E *
E **
EcoSyn 80
1197
345
100
175
100
230
G 1/2
G 3/4
EcoSyn 100
1342
490
100
175
100
230
G 1/2
G 3/4
THE PRINCIPLE OF OPERATION
The heat pump is in fact a thermodynamic heat generator, drawing heat from a low
temperature level (e.g.: heat from the ambient air) to a higher temperature level (e.g.: hot
sanitary water).
The heat drawn from the ambient air, along with the electric energy, generates heating
energy, which is available for heating the sanitary water.
Fig. 1: Chart of energy flow through the heat pump unit
DIMENSIONS
* - normal DIN
** - normal NF
Fig. 2: Connection and installation dimensions of the heat pump [mm]

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INSTALLATION OF THE HEAT PUMP
The heat pump can be used using the ambient air or air from other premises. The heat
pump must be installed in a frost-free room. When selecting a place for installation,
particular attention should be paid that the selected air intake location is dust free, because
dust has adverse effects on the heat pump performance. When selecting the place of
installation, pay attention to the solidity of the wall –can it take the weight of the heat pump
together with the weight of the water inside the boiler? Take all the necessary precautions
to prevent the operation noise and vibrations from transferring through the walls to the
premises where this would be disturbing (bedrooms, rest areas). Do not install the heat
pump and its air intake in premises with other air consumption appliances (gas boilers,
solid-fuel fireplaces, dust extraction appliances etc.) During installation, please bear in
mind the minimum distances from the wall, ground and ceiling. The condensate outlet from
the heat pump is placed on the bottom left side in the form of a plastic tube with an external
diameter of ø18 mm. This tube should be connected to the external condensate outlet pipe
and led to the sewage system or a container. The quantity of condensate depends on air
temperature and humidity when the heat pump is in operation.
To prevent pressure depression in the building,
fresh air must be regularly supplied to the
premises. The desired rate of air exchange for a
residential building is 0.5. This means that the
entire quantity of air in the building is exchanged
every two hours.
Connecting the heat pump to the same pipeline
as the kitchen extractor fan or taking air out of
several smaller apartments or suites is not
allowed.
Fig. 3: Ventilation
To minimize the transfer of noise and vibrations
through walls into the premises where this would
be disturbing (bedrooms, rest areas), please take the following measures:
- install flexible joints for hydraulic connections
- install a flexible tube for the pipeline of inlet/outlet air
- plan vibration insulation for wall openings
- plan noise dampers for inlet/outlet air
- pipelines for inlet/outlet air should be attached using noise dampers
- plan vibration insulation against the wall

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a) Operation using ambient air
In this type of operation, the device heats domestic water
using only the amount of energy generated by the air from
the room where the device is installed. The heat pump
must be installed in a ventilated, frost-free room, possibly
in the vicinity of other heating sources. For optimal
performance of the heat pump, we recommend a
sufficiently large and well ventilated room with the
temperature ranging between 15 °C and 25 °C. It is vital
to ensure sufficient intake of air in the room. Elbows must
be installed on the heat pump and turned so that they
prevent the mixing of air. Heat losses are greater in
premises with colder air.
b) Operation using air from other premises
In this type of operation, the heat pump uses air from
other premises via a pipeline system. It is advisable to
insulate the pipeline system to prevent the formation of
condensate.
In case of using air from outside, the external part must be
covered so as to prevent the intrusion of dust or snow into
the appliance. Besides the drag in the pipes and elbows, the user should be aware that
increased drag also increases noise levels.
In case of using air from outside, the user should adhere to the minimum diameter of the
pipes ø125 mm or □150x70.
To make sure the operation of the pump is effective at all times, you can install dampers to
take air from the premises and then return it either to the premises or outside. If the
temperature of air is under -7 °C, heaters for the heating of domestic water are switched
on. The heat pump operates in reserve mode.

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Fig. 5: Possible installation of a heat pump
PRESSURE LOSS IN CASE OF USING THE PIPELINE SYSTEM
In planning the pipeline system for the inlet and outlet of air to and from the heat pump, the
key element is to take into account the aerodynamic character of the fan which also causes
the loss of static pressure.
Presentation of the diagram of aerodynamic characteristics for different speeds of
the fan
The diagram (Diagram 1) includes aerodynamic characteristics of the operation of the fan.
The top line represents the curve of air flow depending on the pressure drop at maximum
speed of the fan (100 %). The bottom line represents the operation of the fan at minimum
speed (40 %). The curves between (60 %, 80 %) represent the aerodynamic
characteristics at lowered revolutions of the fan. The bottom line that lies between points
(0,0) and (340,50) represents the internal drop of static pressure created by the evaporator
alone, without overloading the pipeline system. This pressure drop cannot be eliminated.

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- Operating area with a normal air flow with respect to the pressure drop and fan setting.
- Area of more efficient use –volumetric flow of air is higher here, which requires a lower pressure drop
(channel system with minimum pressure drop). Fan is set to higher speeds.
Diagram 1: Aerodynamic characteristics
Air inlet and outlet pipeline system
When connecting the sanitary heat pump to an existing pipeline system, we use the basic
pipe elements that we connect into a pipeline system for air inlet and outlet. The air
pipeline should consist of round pipes with an inner diameter of ø125 mm, or rectangular
pipes with a cross section of □150x70 mm.
Fig. 6: Schematic demonstration of the basic elements in a pipeline system for inlet and outlet of air

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Calculationof pressure drops
The values of total static pressure drop can be calculated by adding up the losses from
individual elements built into the air pipeline system and the internal static pressure. The
values of static pressure drops of individual elements (static pressure drops of elements
relate to the internal diameter ø125mm or □150x70mm) are shown in Table 1.
Type of element
Value of static pressure loss
a.) Spiral ribbed pipe
Diagram 2
b.) Rectangular pipe □150x70 mm
Diagram 2 (according to DN 125)
c.) Rectangular elbow - horizontal 90°
5 Pa
d.) Elbow 90°
4 Pa
e.) Angular reducer ø125 to □150x70
5 Pa
f.) Rectangular elbow - vertical 90°
5 Pa
g.) Elbow 45°
3 Pa
h.) Reducer ø125 to □150x70
3 Pa
i.) Flexible tube
Diagram 2
j.) Air intake grid
25 Pa
Table 1: Types of elements and corresponding pressure loss values
Flexible pipe according to DN 125
Spiral ribbed pipe DN 125
Diagram 2: Value of the static pressure drop for selected pipes

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Number of
elements
p (Pa)
p (Pa)
Rectangular elbow horizontal 90°
4
5
20
Flexible tube (DN125)
13.5 m
1.85 (at 150 m3/h)
25
Air intake grid
1
25
25
Total:
70
Table 2: Example of pressure drop calculation
Note:
As mentioned above, the total loss of static pressure, which can be calculated by adding
up the losses of individual elements built into the pipeline system, may not exceed 95 Pa. If
they do, the values of COP start dropping more dramatically.
DETERMINING THE FAN SETTING
When pressure drop is determined, select the mode in which the fan will operate. This
determines the speed of the fan. The mode is selected using Diagram no. 1, which shows
the aerodynamic characteristics of the fan depending on the air flow and pressure drop in
the pipeline*.
Note:
*Pressure drop in the pipeline –in diagram 1 this is marked as pressure difference.
Zone of operation of the sanitary heat pump
On diagram 1 there are two zones of operation of the sanitary heat pump among the
curves:
•The dark zone represents the area of use with higher efficiency. The volumetric air flow is
higher in this zone, which requires a lower pressure drop (channel system version with
minimum pressure drop).
•The light zone represents the area of use with lower air flow in relation to the pressure
drop and fan setting.
Noise
Like the aerodynamic characteristics rise from the lowest to the highest, the noise
increases as well. Between the aerodynamic characteristics 80% and 100 % there is a
zone with increased noise.
Checking the calculation of pressure drop
Determining the aerodynamic characteristics based on the calculation of pressure drop
while taking into account individual elements of the pipeline and air flow is an iteration.
Once the aerodynamic characteristic has been determined and set, we must measure the
air flow in the pipeline. If the air flow does not correspond to the ventilation system, we
select the next higher or lower aerodynamic characteristic that corresponds to the
ventilation system.

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Selecting the operating point of the fan for the ventilation system
When determining the speed of the fan, we must know the maximum air flow for ventilation
and pressure drop caused by the pipeline. In Diagram 1, find the desired air flow and draw
a vertical line, then draw a horizontal line at the pressure drop that you have calculated
(based on the existing pipeline). Select the fan characteristic curve that lies the closest to
the point where the lines cross.
Example of selecting the aerodynamic characteristic
In diagram 3 at air flow of 150 m³/h draw a vertical line. The pipeline represents 70 Pa of
pressure drop, which is added to the below (red) line**. Total pressure drop is thus 90 Pa.
Draw a horizontal line at the pressure drop of 90 Pa. The point where the lines meet lies on
the curve that corresponds to 60% speed of the fan. This is the standard setting of the fan
that has also been preset by the manufacturer.
Note:
**Line, represents the internal static pressure drop created by the evaporator.
Diagram 3: Example of determining aerodynamic characteristic

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CONNECTION TO WATER SUPPLY MAINS
Water inlet and outlet on the heat pump are marked with colours. Cold water inlet is
marked with blue, and warm water outlet is marked with red. The heat pump is designed
for connection to indoor water supply mains without using the relief valve if the pressure in
the supply mains is lower than 0.6 MPa (6 bar). If the pressure is higher, a relief valve
needs to be installed so as to provide that the pressure at the inlet to the hot water tank
does not exceed the nominal pressure.
Installing a safety valve is mandatory in order to assure safe operation. The valve prevents
an increase of the pressure in the boiler by any more than 0.1 MPa (1 bar) above the rated
pressure. The outflow nozzle on the safety valve must have an outlet into the atmosphere.
To assure correct operation of the safety valve, the valve must be regularly checked.
When checking the valve, push the lever or unscrew the nut of the valve (depending on the
type of the valve) and open the drain from the safety valve. Water must flow from the valve
nozzle, showing that the valve operation is faultless. During the heating of water, the water
pressure in the hot water tank is increased up to the level preset in the safety valve. Since
the system prevents backflow of water into the water supply mains, water may be dripping
from the outlet opening on the safety valve. The dripping water may be drained via trap into
the drains; the trap is mounted under the safety valve. The outlet pipe, which is mounted
under the safety valve, must be directed downwards, in a place with a temperature above
freezing.
If the installation does not allow draining of the water from the safety valve into the drains,
dripping can be avoided by installing an expansion vessel onto the heat pump inlet pipe.
The volume of the expansion vessel must be ca. 3% of the hot water tank volume.
Fig. 7: Closed (pressure) system
Legend:
1 - Pressure mixer taps
2 - Expansion tank
3 - Safety valve
a - Test valve
b - Non-return valve
4 - Funnel with outlet connection
5 - Checking fitting
6 - Pressure reduction valve
7 - Closing valve
H - Cold water
T - Hot water

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CONNECTING THE HEAT PUMP TO THE POWER SUPPLY
NETWORK
Before connecting to the power supply network, install a
power supply cord in the heat pump, with a min. diameter of
1.5 mm2 (H05VV-F 3G 1.5 mm2). To do this, remove the
protective cover from the heat pump. The cover is attached
using two screws (Fig. 8). Connecting the heat pump to the
power supply network must take place in accordance with the
standards for electric appliances. To comply with the national
installation regulations, an all poles disconnect switch must be
installed between the heat pump and the power supply
network.
Fig. 8: Protective cover
Fig. 9: Electrical circuit diagram
Legend:
T1 - Bar with sensors
T2 - Evaporator –temp. sensor
T3 - Air temperature sensor
1 - 4-way valve
2 - Compressor
4 - Fan
5 - Electric heating element
(2 x 1000 W)
6 - Thermal cut-out
7 - Magnesium anode
8 - LCD touch screen
9 - Boiler - ground
10 - Housing - ground

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HEAT PUMP OPERATION
The heat pump can be operated using an LCD touch screen (Fig. 10). If you press
anywhere on the screen, the screen lights up. When the screen is lit up, the operation
fields are active.
When the heat pump is connected to the water and power supply mains and the boiler is
filled with water, the heat pump is ready to be used. The heat pump heats the water in the
range 10 °C - 55 °C. From 55 °C - 75 °C the water is heated by electrical heaters.
Figure 10: Operation display
Legend:
1 - Signalization of the operation of solar
collectors
2 - Alternative source of heating/turned on
3 - Signalization of the backup operation
4 - Indication, overview of operation errors,
entrance into the service menu
5 - Display and setup of temperature in °C
6 - Start and setup of the VACATION
programme
7 - Day of the week
(1 .. Monday, …, 7 .. Sunday)
8 - Reducing the value
9 - Heat pump on/off switch
10 - Increasing the value
11 - TIMER start and setup
12 - Time setup and display
13 - Start-up of quick heating "TURBO"
14 - Indicator of the heating element operation
15 - Start-up of heating to the maximum
temperature level
16 - Signalization of compressor operation
17 - Signalization of anti-legionella
programme operation
18 - Warm water quantity display
19 - Signalization of defrosting
20 - Signalization of fan operation
** function is not used in versions Ecosyn

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Starting/stopping the heat pump
•To start the heat pump, hold field no. 9.
When the appliance is switched on, the fan starts first and operates for one minute
(symbol no. 20 is displayed). If the temperature of inlet air is appropriate, the controlling
unit switches on the compressor and the heat pump operates in normal mode (symbols
16 and 20 are displayed). The heat pump is on, the screen remains unlit and inactive.
In 60 seconds after the last touch of the screen, the illumination and activity of the
screen are turned off, but that does not affect the operation of the heat pump. Pressing
anywhere on the screen re-activates the screen and its illumination.
If trying to start up at a lower temperature, please see chapter "Operation at lower
temperatures".
•By holding field no. 9, the heat pump is switched off.
The appliance stops functioning and the only field visible on the screen is field no. 9. (If
you switch off the heat pump for a longer period of time, the water must be drained
from the pump if there is any danger of freezing).
Power failure protection
In case of power failure, the settings remain stored for up to 23 hours.
After restarting, the heat pump operates in the same mode it was operating in before the
power failure.
Operation at lower temperatures
When the appliance is switched on, the fan starts first and operates for one minute
(symbol no. 20 is displayed). If the temperature of inlet air is lower than -7 °C, the fan is
turned off. Domestic water is heated with heaters. The heat pump operates in the reserve
mode (symbol no. 14 is displayed). The possibility of switching to normal mode is
checked every 2 hours by switching on the fan for one minute. If the temperature of inlet
air is higher than -7 °C, the heat pump switches to normal mode of operation (symbols
16 and 20 are displayed). The heaters switch off. The heat pump is on, the screen
remains unlit and inactive.
At lower air temperatures, the evaporator defrosting cycle is started if necessary. Symbol
no. 19 is displayed on the screen. The fields 2, 4, 6, 11, 13 and 15 remain inactive.
Defrosting takes place until the conditions for normal operation of the heat pump are
achieved.
After successful defrosting, the heat pump returns to normal operation (symbols 16 and
20 are displayed).
If defrosting is unsuccessful, the controlling unit displays an error message. Field no. 4
starts flashing, accompanied by warning beeps. By pressing field no. 4 the warning
beeps can be turned off. Error code E247 appears in field no. 12 and the pump switches
automatically to heating with electric heaters. The screen displays symbol no. 14. The
error code can be deleted at any time by pressing field no. 4. Field no. 12 resumes to
displaying time.

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b) The Z version
When the appliance is switched on, the fan starts first and operates for one minute
(symbol no. 20 is displayed). If the temperature of inlet air is lower than 7 °C, the fan is
turned off. Domestic water is heated with heaters. The heat pump operates in the reserve
mode (symbol no. 14 is displayed). The possibility of switching to normal mode is
checked regularly. If the temperature of inlet air is higher than 7 °C the heat pump
switches to normal mode of operation (symbols 16 and 20 are displayed). The heaters
switch off. The heat pump is on, the screen remains unlit and inactive.
Setting the clock and day of the week
•Hold field no. 12, until field no. 7 shows a flashing number of the day of the week.
•By pressing + or –you can set the number of the day of the week
(1 –Monday, …, 7 –Sunda y).
•Press field no. 12 again (flashing hour setting is displayed).
•By pressing + or –set the hour (by holding + or –you can speed up the setting).
•Press field no. 12 again.
•Flashing minute setting is displayed.
•By pressing + or –set the minutes (by holding + or –you can speed up the setting).
•The setting is stored when you press field no. 12, or when the field stops flashing.
Setting the temperature
•Press field no. 5 (the set temperature starts blinking).
•By pressing + or –you can change the temperature setting from 10 °C to 75 °C (preset
to economic temperature of 55 °C).
•The setting is stored by pressing field no. 5 again, or when field no. 5 stops flashing.
After a few seconds, the display shows the actual temperature.
In case of power failure, the last stored value is
restored.
Switching on the "TURBO" mode
•If you need more warm water than the heat pump can heat up in a short period of time,
press field no. 13 (switches on the "TURBO" mode). The heat pump and heater work
simultaneously. The screen shows symbols no. 14, 16 and 20. When the temperature
reaches 55 °C the heat pump returns to the mode used before the "TURBO" mode.
Switching on the "HOT" mode
•If you want to heat the water to the maximum temperature of 75 °C, press field no. 15.
The heat pump will heat water to 55 °C. The screen displays symbols no. 16 in 20.
When the temperature in the boiler reaches 55 °C the electric heater turns on to heat
the temperature up to 75 °C. The screen displays the symbol no. 14. When the
temperature reaches 75 °C the heat pump returns to the mode used before the "HOT"
mode.

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Display of the quantity of water in the heat pump
The display shows the symbol 18: - no warm water
- low quantity of warm water
- high quantity of warm water
Setting the vacation mode
In the vacation mode, you can set the number of days (maximally 100), when the heat
pump shall maintain the minimal temperature of water (approximately 10 °C).
•Hold field no. 6 for a while (fields 5 and 6 start to flash).
•By pressing fields + or –you can set the number of vacation days shown in field no. 5.
•By pressing field no. 6 again, or when field no. 6 stops flashing, the set number of days
is stored.
•If you set the value to 0, then the heat pump will resume its normal operating mode
after confirming the setting, and illumination of field no. 6 will turn off.
•After the set number of days has elapsed, the heat pump returns to the normal mode
and illumination of field no. 6 turns off.
Setting the TIMER mode
In the TIMER operating mode, you can set the times when the heat pump will start and
stop. For each timer combination you can set up to three time periods in which the heat
pump will not heat the water.
a) Setting the timer combinations
•Hold field no. 11 for a while (fields 7 and 11 start to flash).
•By pressing fields + or –choose among three timer modes of operation:
- Timer mode of operation of the heat pump for the entire week (numbers 1-7 flash in
field no. 7),
- Timer mode of operation of the heat pump for Monday to Friday and Saturday to
Sunday (numbers 1-5 and then 6 and 7 flash in field no. 7),
- Timer mode of operation of the heat pump for each day at a time (individual numbers
1-7 flash in field no. 7). Press field + or –to select each day of the week.
•To set the time, press field no. 12.
•On the field no. 5, the text 1OF appears and field no. 12 starts to blink.
•By pressing fields + or –set the time of shutdown.
•Press field no. 12 again.
•On the field no. 5, the text 1ON appears and field no. 12 starts to blink.
•By pressing fields + or –set the time of start-up.
•By pressing field no. 12 again, you can use the above procedure to set the second and
third period.
•If you do not want to set the second and third periods, confirm the setting by pressing
field no. 11 or wait for field no. 12 to stop flashing and the setting to be saved
automatically.
•To set the second and third periods, set the start and end of periods 2 and 3 and
confirm the setting following the procedure described above by pressing field no. 11 or
wait for field no. 12 to stop flashing and the setting to be saved automatically.

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•To set the timer operating mode "for each day of the week" or "for the period from
Monday to Friday and from Saturday to Sunday", set all 3 time periods following the
procedure described above.
b) Activation, deactivation of timer
•By pressing field no. 11, you can activate the set timer mode.
•The heat pump heats the water in the ON periods (to the set temperature) and in the
OFF periods, it does not heat the water.
•By pressing field no. 11 again, you can deactivate the set time mode of operation.
Fig. 11: Time periods
Ventilation
•Activate ventilation by pressing field no. 2. The function is automatically switched off
after 30 minutes.
•By shortly pressing the filed 2 again, the ventilation is deactivated.
•By shutting down the heat pump with the on/off options the ventilation is deactivated.
•In case of power failure while the ventilation is activated, the ventilation will proceed
after the reconnection of the power supply for the remaining time but no longer than 30
minutes.
•In the event of any other failure the ventilation is deactivated.
•Ventilation cannot be activated:
- in case of any kind of failure
- during antilegionella function operation
- during defrosting.
•Symbol 2 is active and visible.
Backup mode
•Activate backup mode by pressing field no. 2.
•Backup mode uses heaters and is activated when an error occurs on the aggregate.
The water is heated with heaters.
•By pressing field no. 2 backup mode is deactivated.
•Symbol 3 is displayed.
•If the backup mode is activated, please contact the maintenance services.

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Maintenance level access
•By pressing field no. 4, you can activate the maintenance mode (Figure 10).
•A display menu with an inscription “code” in the filed CLOCK appears. Enter the
maintenance code (fields FN1, FN2, FN3, FN4, FN5 in FN6 for numbers 1, 2, 3, 4, 5,
6).
Fig. 12: Fields display
•If you do not press any field for 10 s, the programme returns to the start menu.
•If the code is incorrect, the programme returns to previous operation.
•If the code is correct, the first parameter appears on the display. The number on the
right is the serial number of the parameter and the field on the left is intended for its
value.
•The first parameter :00 is a version of a software code and serves information purposes
only.
•By pressing the right number (Field CLOCK in Figure 12) you proceed to the next
parameter.
Installation level (code: 1166)
After the first code entry for the installation level the programme allows access to the
following parameters:
:00 programme code
:21 fan speed
:27 low temperature mode
:39 interval setting for anti-legionella function activation
:45 temperature settings °C or °F
Fan speed settings (parameter :21)
•Select the parameter :21 and set the fan speed by pressing (+) or (–) (40% - 100%).
See the numerical value settings on the left side in field 5. When the fan speed is set,
you can save the changes by waiting a few moments or by pressing no. 4.