Nibe Drazice Aqua HP 250 Specification sheet

OPERATING AND
INSTALLATION MANUAL
WATER HEATER WITH HEAT PUMP
AQUA HP 250 / 2,2 kW
Družstevní závody Dražice-strojírna s.r.o.
Dražice 69, 294 71 Benátky nad Jizerou
tel.: +420 / 326 370 911
fax: +420 / 326 370 980
e-mail: [email protected]

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CONTENTS
INTRODUCTION .....................................................................................................................................5
1.1 SYMBOLS.....................................................................................................................................5
1.2 PRE-INSTALLATION INFORMATION ............................................................................................5
1.3 SAFETY INFORMATION ...............................................................................................................6
SPECIFICATION ......................................................................................................................................7
2.1 COMPONENTS ............................................................................................................................7
2.2 HEAT PUMP PRINCIPLE...............................................................................................................8
2.3 TECHNICKÉ PARAMETRY.............................................................................................................9
TRANSPORT .........................................................................................................................................10
INSTALLATION .....................................................................................................................................11
4.1 SAFETY AND CONTROL DEVICES...............................................................................................11
4.1.1 HIGH/LOW PRESSURE SWITCH.........................................................................................11
4.1.2 THERMAL FUSE.................................................................................................................11
4.1.3 TEMPERATURE SENSOR....................................................................................................11
4.1.4 CORROSION PROTECTION ................................................................................................11
4.1.5 EXPANSION VESSEL *........................................................................................................11
4.1.6 SAFETY SYSTEM *..............................................................................................................11
4.1.7 PRESSURE REDUCING VALVE *.........................................................................................12
4.2 DRAIN PAN................................................................................................................................12
4.3 LOCATION.................................................................................................................................12
4.4 AIR INLET/OUTLET INSTALLATION............................................................................................13
4.4.1 INSTALLATION WITHOUT DUCTS......................................................................................13
4.4.2 INSTALLATION WITH DUCTS.............................................................................................14
4.5 PLUMBING FIXTURE..................................................................................................................17
4.6 CONDENSATE............................................................................................................................18
4.7 ELECTRIC CONNECTIONS ..........................................................................................................18
4.8 WIRING DIAGRAM ....................................................................................................................19
CONTROL AND PROGRAMMING .........................................................................................................20
5.1 CONTROL PANEL.......................................................................................................................20
5.2 KEYS (FUNCTIONS)....................................................................................................................20
5.3 DISPLAY.....................................................................................................................................21
5.3.1 DISPLAY DESCRIPTION ......................................................................................................21
5.3.2 SYMBOLS...........................................................................................................................21

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5.3.3 SYMBOLS IN THE APPLIANCE'S OPERATION.....................................................................22
5.4 PUTTING INTO OPERATION ......................................................................................................23
5.5 OPERATING MODES..................................................................................................................23
5.5.1 ECO MODE........................................................................................................................24
5.5.2 AUTO MODE .....................................................................................................................24
5.5.3 BOOST MODE....................................................................................................................24
5.5.4 LAT MODE.........................................................................................................................24
5.5.5 TCC MODE.........................................................................................................................25
5.5.6 CHRONO SCHEDULING OF THE HEAT PUMP ....................................................................26
5.5.7 CHRONO SCHEDULING OF THE RECIRCULATION PUMP...................................................27
5.5.8 ADDITIONAL FUNCTIONS..................................................................................................27
5.6 ADDITIONAL FUNCTIONS..........................................................................................................29
5.6.1 DISINFECTION MODE .......................................................................................................29
5.6.2 VACATION MODE .............................................................................................................29
5.7 MENU........................................................................................................................................29
5.8 CHANGING THE MODE .............................................................................................................29
5.9 NUMBER OF SHOWERS AVAILABLE..........................................................................................30
5.10 CONSULTATION OF PROBE TEMPERATURES (S1, S2, S3) .........................................................30
CHECKING GOOD RUNNING CONDITION............................................................................................31
DESCRIPTION OF PARAMETERS...........................................................................................................31
ERRORS................................................................................................................................................34
PROBE CHART......................................................................................................................................35
TROUBLESHOOTING ............................................................................................................................36
SYSTEM MAINTENANCE ......................................................................................................................37
11.1 GENERAL INSPECTION ..............................................................................................................38
11.2 DRAINING WATER FROM THE TANK.........................................................................................38
11.3 MAGNESIUM ANODE................................................................................................................38
11.4 FILTER OF REDUCTION VALVE ..................................................................................................39
11.5 CONDENSATE CIRCUIT..............................................................................................................39
11.6 CLEANING AIR CIRCUIT.............................................................................................................39
11.7 SAFETY THERMOSTAT...............................................................................................................39
* not included in the delivery

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CAREFULLY READ THIS MANUAL BEFORE INSTALLING THE WATER HEATER!
Dear Customer,
The Works Cooperative of Dražice - Machine Plant, Ltd., would like
to thank you for your decision to use a product of our brand.
The product is not intended to be controlled by
a) people (including children) with reduced physical, sensual or mental capacities, or
b) people with insufficient knowledge and experiences unless supervised by responsible person,
or unless properly instructed by such responsible person.
The manufacturer reserves the right for engineering modification of the product. The product is designed for
permanent contact with drinkable water.

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INTRODUCTION
Water heater with an AQUA HP air-water heat pump certainly fulfils all your expectations, and will
comfortably serve you and achieve maximum energy savings for many years. The manufacturer devotes a lot
of time, energy and financial resources to the development of innovations that will promote energy savings
achieved by using the product. Your choice proved correct sentiment and concern about energy
consumption, therefore, a matter that affects the environment. The manufacturer has been committed
to constantly come up with innovative and effective products so that the rational use of energy could actively
contribute to environmental protection and natural resources of the planet. This manual, the purpose
of which is to inform, warn and advise in connection with the use and maintenance of this appliance, should
be retained.
1.1 SYMBOLS
Every process that the supplier believes to be conducive to harmful danger and/or material
damage will be signaled with a danger sign.
To better characterize the danger, the symbol will be followed by one of these words:
•DANGER: when there is the possibility of harm to the operator and/or people in the
vicinity of the equipment
•WARNING: when there is the possibility of material damage to the equipment and/or
attached materials.
All the information that the supplier believes to be an asset for better performance
and preservation of the equipment, will be signaled together with the information sign.
1.2 PRE-INSTALLATION INFORMATION
The electrical installation of the equipment must comply with the national regulations
for electrical installations in effect.
AQUA HP will only operate after receiving its load of coolant.
The maximum water pressure into the hydraulic circuit inlet is 0.3 MPa and the minimum
pressure is 0.1 MPa.
The power supply is 230 V, 50 Hz, and the power supply cable is plugged into a socket with earth
wiring. If the power supply cable is damaged, it must be replaced by the manufacturer,
by its customer service, or by staff with similar training in order to avoid any danger.
AQUA HP will only operate if the storage water heater is filled with water. Heating of other fluid
than drinking water is not allowed.
Heating other than potable water is not allowed
DANGER
WARNING

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1.3 SAFETY INFORMATION
The appliance can be used by children from 8 years of age, persons with physical, sensory
or mental disability or people without experience or knowledge, as long as those people were
briefed on the operation of this device in a secure manner, and are familiar with the related
dangers
The appliance cannot be played with by children.
Cleaning and maintenance must not be performed by children without proper supervision.
When installing:
•The installation of heat pump equipment for heating sanitary water must be carried out by staff with
suitable training and qualified for this purpose;
•The device should not be installed in places that present a risk of impact, shock or explosion;
•Keep the equipment packed until you reach the place and time of installation; Make sure all hydraulic
couplings are watertight before connecting the equipment to the power supply.
Maintenance of the equipment:
•Equipment maintenance should be carried out by customer service, except operations of general and
continuous cleaning which could/should be carried out by the user;
•Power supply to the equipment must be disconnected during maintenance operations;
•The supplier recommends at least one annual inspection to the equipment, by a qualified technician;
•Cleaning and maintenance must not be carried out by children unless they are under supervision
High pressure and temperature:
•The principle for running this equipment is directly linked to high temperature and pressure; thus,
the processes that imply contact with the equipment, must be thought out with caution to prevent
the risk of burns and projection of material;
Refrigerant Fluid:
•The refrigerant fluid used in the entire process is R134a, CFC-free, non-inflammable and without
harmful effects to the ozone layer;
•However, according to the law, the fluid in this equipment cannot be released into the environment;
•Handling of the fluid in the equipment must be carried out by a qualified technician.
Information for the Client:
•The Installer must inform the client about the running of the equipment, its dangers, rights and duties
of the client;
DANGER

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SPECIFICATION
2.1 COMPONENTS
AQUA HP
Terminal dimensions
Description of outlets
A
1970
-
-
B
99
G 1“ M
C –Cold Water Inlet
C
215
G 1“ M
NA
D
706
G 1“ M
E
840
G 3/4 “ M
R –Recirculation
F
1025
G 1 1/4 “ M
Mg –Mg anode
G
1343
G 1/2 “ F
PT –Temperature sensor
H
1475
G 1“ M
H –Hot Water Outlet
I
Ø580
-
-
J
286
-
-
K
Ø190
-
-
L
Ø160
-
-

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A cooling system, at the top, responsible for transferring heat from ambient air to sanitary water.
2.2 HEAT PUMP PRINCIPLE
Electrical box
Filter
Compressor
Low pressure switch
High pressure switch
Air extraction duct
Expansion valve
Fan
Evaporator
Condensate drain
Solenoid valve
Ambient air inlet
Fan
Compresor
Expansion
valve
Evaporator
Ambient air outlet
(Extraction duct)
Condensator
HOT WATER RECEPTACLE

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1. The cooling fluid (R134a) is compressed in the high efficient compressor, raising its pressure
and temperature.
2. In the condenser (not in direct contact with the water), the heat energy in the cooling fluid
is transmitted to the water in the water storage heater.
3. The condensate fluid (high pressure) runs from the expansion valve which is responsible for easing
the its pressure.
4. The fluid absorbs heat energy from the environment by flowing through the evaporator with the help
of a fan.
The R134a is a HFC fluid, thus not harmful to the ozone layer. It has great chemical and thermal
stability, low toxicity, non-inflammable, and is compatible with most materials.
2.3 TECHNICKÉ PARAMETRY
Unit
AQUA HP 250 / 2,2 kW
Type of Equipment
Water heater with heat pump
Hot water volume
l
250
Weight without water
kg
100
Dimensions (ø/height)
mm
580 / 1970
Material of upper part
-
Stainless steel
Tank shell material
-
Steel sheet
Insulation
-
Polyurethane foam 50 mm
Mg anode
-
1” 1/4 F
Maximum service temperature
°C
80
Maximum service pressure
bar
7
Test pressure
bar
10
Heat loss
kWh/24h
1,01
IP Protection
-
IPX1
Supply voltage
-
1 PE-N 230 V / 50 Hz
Input (medium / maximum)
W
400 / 700
Output of the electrical heating element
W
2200
Heat pump output
W
1800
Fan input
W
65
Maximum service current
A
3,2 + 9,5 (with backup electrical heating)
Recommended breaker
-
16A (sensitivity 30 mA)
Max temperature of hot water for heat pump
°C
60
Max temperature of hot water for heating element
°C
70
Coolant
-/kg
R 134a / 1,2
Load profile
-
XL
COP 2)
-
3,61
Heating time 2)
HH:mm
05:36
Volume of usable water 40 °C 2)
l
323
Energy efficiency class 2)
-
A+
Energy efficiency 2)
%
149
Annual energy consumption 2)
kWh . a-1
1251
Ambient temperature limit values
°C
-5 / 40
Acoustic pressure level
dB(A)
51
Acoustic pressure level at 2m
dB(A)
36
Airflow
m3/h
450
Static Pressure Fan
Pa
80
Maximum length of air technical manifold
m
40
1) A20/W10-54, according to EN16147 and applicable regulation No. 812/2013 2) According to EN12102

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TRANSPORT
The equipment must be carried in an upright position. The equipment must be raised and
lowered with extreme care, to avoid impact that coulddamage the material. Make sure the belts
and/or transportation straps do not damage the material. Always use suitable means to
transport the material (pallet lift, forklift, etc.)
Correct transport position Incorrect transport position
During the transport and installation phase, do not take the equipment by the upper part.
The equipment must be transported in its original package to the place of installation. The packages contain
the following information symbols:
Fragile, handle with extreme caution.
Keep the package dry.
Make sure the arrows are always up.
Do not stack packages.
WARNING
WARNING

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INSTALLATION
4.1 SAFETY AND CONTROL DEVICES
4.1.1 High/Low Pressure Switch
In case of running outside the range of pressures recommended and defined by the supplier, the equipment
will switch off and indicate error in the electronic panel.
4.1.2 Thermal fuse
Thermal fuse is factory set by the manufacturer, and ensures that the water temperature in the hot water
tank does not exceed the maximum value. If the temperature exceeds this value, the fuse shuts off backup
electric heating. Turning on is performed manually by a service technician after analyzing the reasons for
the switching off.
4.1.3 Temperature sensor
Temperature sensor measures the water temperature in the hot water tank to control the entire system.
4.1.4 Corrosion protection
In addition, the top part shell of the hot water heater is corrosion resistant (it is made of stainless steel)
and the hot water tank is enameled and also contains magnesium anode which needs to be checked
regularly, as recommended by the installer or service technician.
4.1.5 Expansion Vessel *
The expansion vessel is a device whose purpose is to compensate for the increase in water volume due to
temperature rise.
Installing the expansion tank is recommended to save water. The recommendation of installing
an expansion tank is the responsibility of the installer. It is generally installed on a cold water
pipe.
4.1.6 Safety system *
The safety device allows the system to be protected against anomaly situations: cold water supply, hot water
flowing back, emptying of the storage water heater and high pressure. The valve is calibrated to activate
at 0.7 MPa). To drain the water in the storage water heater, you should close the supply valve and open the
discharge valve. The safety valve discharge pipe must be open into the atmosphere, because the valve may
drip water or even discharge water. The safety valve must be opened regularly to remove impurities
and check that it is not blocked. The discharge pipe must be installed in a vertical position. The discharge pipe
must be installed upright away from a cold environment.
Installing this device is recommended for the proper installation of the equipment. Installing this
device is the responsibility of the installer. As a general rule it is installed in the cold water pipe.

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4.1.7 Pressure Reducing Valve *
The pressure reducing valve must always be installed upstream from the safety device, and ready to activate
in situations when the pressure in the circuit exceeds 3 bar (0.3MPa). This valve comes with a pressure gauge.
* Parts that are not delivered by the manufacturer. Their delivery and installation must be performed
by the installer.
4.2 DRAIN PAN
The equipment should not be installed over an area where drains from the tank or its connections could
cause damage in the adjacent area or on the lower floors of the structure. For the aforementioned reasons,
it is recommended to place a drain pan under the equipment.
It is important that the pan has a flow channel with a minimum diameter of 3/4’’.
4.3 LOCATION
When placing the equipment in its position, bear in mind possible future interventions.
Make sure that there is at least the following free space around the equipment:

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Adjust the levelling legs of the appliance. Acceptable is the tilt angle 1° rearward.
If equipment tilts other than back- wards,
this will cause condensates to deposit in
the tank.
4.4 AIR INLET/OUTLET INSTALLATION
As the AQUA HP absorbs heat during its operation, the air flow (inlet/out- let) must be directed
to unheated areas. The equipment will cool the room where it is placed and so if it is installed
in heater rooms, the air flow must be directed to other rooms and/or the outside.
4.4.1 Installation without Ducts
The AQUA HP equipment must be in- stalled in a
place that is not too heated, and may be used for
dehumidifying and cooling these rooms (e.g.,
laundries, cellars, etc). Distance between the top
of the unit and the ceiling must be no less than
600 mm.
If the distance between the unit and the ceiling
is less than 600mm, two elbow-type jointsmust be
installed as shown in the following picture.
WARNING

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4.4.2 Installation with Ducts
The Heat Pump is prepared to install ducts with diameter of 160 mm and 190 mm, in its air intake
and extraction zones:
1) Considering 90° curves and louvers at the air inlet and outlet of the equipment.
If ducts are used, directing the air flow to areas that do not require heating, there are some options:
Using Outside Air
If outside air is used, the unit may be placed
either in a heated room or in an unheated
room.
Max Length Ducts
Ø 160
Ø 190
Rigid duct 1)
m
24
40
Flexible duct 1)
m
12
20
Inner Ø 160 mm
Outer Ø 190 mm

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Using Ambient Air
The monobloc unit may also be placed in a heated room, but the air flow must be directed to an unheated
room. Bear in mind that because of air flow, cooling the unheated room can affect the adjacent heated
rooms.
UNHEATED AREA
min 50 m3
HEATED OR
UNHEATED
AREA

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Using Ambient and Outside Air
A branched duct can be used to inflate air into the equipment. So, you can get hot air in the summer, from
the outside, and hot air in the winter from an unheated room.
Ducts used to direct the airflow are not included in the equipment, and it is up to the installer
to install them, if necessary, to comply with the manufacturer’s recommendations. Diameter
of pipes must be of 160 mm or 190 mm. Pipes must not exceed 40 m in length.
UNHEATED AREA
min 50 m3
HEATED OR
UNHEATED
AREA

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4.5 PLUMBING FIXTURE
EXPLANATORY NOTES
[1] Shutoff valve
[2] Pressure Reducing Valve (3 bar / 0,3 MPa)
[3] Return Valve
[4] Safety valve (7 bar / 0,7 MPa)
[5] Drainage Siphon
[6] Expansion Vessel
[7] Drain Valve
[8] Circulating pump
[9] Thermostatic Mixing Valve
[A] Cold Water Inlet
[B] Hot Water Outlet
[C] Circulation
It is necessary to install a safety device at the cold water inlet of the appliance. The safety device
must be in compliance with the standard EN 1487:2002, maximum pressure 7 bar (0.7 MPa)
Water must not be stopped from flowing from the safety device to the deposit by any sort of
accessory.
The safety device must be connected with piping whose diameter is not less than the cold water
inlet coupling. The discharge must be connected to a sewage siphon or, if this is not possible,
elevated to a distance of at least 20 mm from the pavement to allow visual inspection.
To prevent high pressure from main water supply, install a pressure reduction valve set to 3 bar
(0.3 MPa).
The Manufacture is not responsible for damage related to not following these recommendations
/ warnings.
WARNING

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The water you use may contain impurities and/or substances damaging to the system and even
harmful to your health. Make sure you use water with quality fitting for home consumption.
The following table indicates some parameters that, when exceeded, must be chemically
treated.
4.6 CONDENSATE
During operation, condensation may occur. These condensates are collected in the drip tray and drained
through a hole at the back of the tray. The installer must connect the condensate hose supplied by the
manufacturer and direct the condensates to the drainage system or drainage siphon.
The condensate hose must not be bent/pressed and must be placed where it best suits
the proper flow of condensates
4.7 ELECTRIC CONNECTIONS
The thermodynamic equipment must be plugged to the power supply only after filling the storage water
heater. The thermodynamic equipment comes with a mains cable, to be connected to an earthed monophase
voltage (1/N/PE 230V/50 Hz). The connections must comply with the standards of installation in effect in the
territory or country where the thermodynamic equipment has been installed
The installation includes:
•Bipolar circuit-breaker with connection cable with section equal to or exceeding 2.5 mm2
•Protection differential circuit breaker of 30 mA
If the power supply cable is damaged, it must be replaced by the manufacturer, by its custom-er service,
or by staff with similar training.
Hardness (°dH)
pH
Treatment
3.0 to 20.0
6.5 to 8.5
No
3.0 to 20.0
<6.5 or >8.5
Yes
<3.0 or >20.0
-
Yes
DANGER
WARNING
WARNING

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4.8 WIRING DIAGRAM
EXPLANATORY NOTES
RES –Electrical backup heater (2,2 kW)
S1 –Water temperature sensor
S2 –Ambient temperature sensor
S3 –Evaporator temperature sensor
VENT –Fan
SV –Solenoid valve
N–Neutral
F–Phase
HP –High pressure switch
LP –Low pressure switch
COMP –Compressor
TB –Thermal fuse
TERM –Compressor thermal
9/10/11 –Phase/Neutral/Ground
T4 –Solar thermal probe

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CONTROL AND PROGRAMMING
5.1 CONTROL PANEL
The control panel of the Thermodynamic Solar system Eco is simple and intuitive. It enables the configuration
of several operating parameters according to the operating mode selected by the user. It comprises six
command keys (ON / OFF / CANCEL, MENU, COMP ▲, E-HEATER ▼, DISINFECT and OK / LOCK that enable
checking the running of the equipment, consult and change parameters.
5.2 KEYS (FUNCTIONS)
Key
Function
Description
ON/OFF
ON/OFF Switch
Turning the controller on and off
CANCEL
(CANCEL) Termination
Function of exiting to the end menu, sub-menu or cancel
function
OK /
(OK) Confirmation
Confirming the parameters in the menus or submenus
(LOCK) Locked /
Unlocked
Locking or unlocking the keypad
MENU
MENU
Entering the menu
COMP
Compressor ON/OFF
Pressing the key allows you to turn the compressor on and
off
E-HEATER
ON/OFF
Electrical resistance
Pressing the key allows you to enable and disable the
electrical resistance
▲
▼
Changing values
Allows you to adjust the parameter value (in menu
context)
Movement across the
menus/submenus
Function to browse menus and submenus (inside the
menu)
DISINFECT
(DISINFECTION) Anti-
Legionella
Press this button and the system automatically creates a
thermal shock in water to neutralize the bacteria
(Legionella)