Drazice AQUA HP 250 I Specification sheet

OPERATING AND
INSTALLATION MANUAL
WATER HEATER WITH HEAT PUMP
AQUA HP
Družstevní závody Dražice-strojírna s.r.o.
(Works Cooperative - Dražice - Machine Plant, Ltd.)
Dražice 69, 294 71 Benátky nad Jizerou
tel.: +420 / 326 370 911
fax: +420 / 326 370 980
e-mail: expo[email protected]z

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CONTENTS
INTRODUCTION .....................................................................................................................................5
1.1 INFORMATION PRIOR TO THE INSTALLATION............................................................................5
1.2 SAFETY INFORMATION ............................................................................................................... 5
SPECIFICATIONS..................................................................................................................................... 7
2.1 COMPONENTS ............................................................................................................................7
2.2 HEAT PUMP PRINCIPLE............................................................................................................... 8
2.3 TECHNICAL PARAMETERS...........................................................................................................9
TRANSPORT .........................................................................................................................................10
INSTALLATION ..................................................................................................................................... 10
4.1 SAFETY AND CONTROL DEVICE.................................................................................................10
4.1.1 LOW-PRESSURE/HIGH-PRESSURE FUSE............................................................................10
4.1.2 THERMAL FUSE .................................................................................................................10
4.1.3 TEMPERATURE SENSOR....................................................................................................11
4.1.4 CORROSION PROTECTION ................................................................................................11
4.1.5 EXPANSION TANK * .......................................................................................................... 11
4.1.6 SAFETY SYSTEM *.............................................................................................................. 11
4.1.7 PRESSURE CONTROL VALVE*............................................................................................11
4.2 LOCATION .................................................................................................................................12
4.3 INSTALLING AIR INTAKE/EXHAUST ...........................................................................................13
4.3.1 INSTALLATION WITHOUT AIR PIPING ...............................................................................13
4.3.2 INSTALLATION WITH AIR PIPING ...................................................................................... 14
4.4 PLUMBING FIXTURE..................................................................................................................16
4.5 CONDENSATE............................................................................................................................ 17
4.6 WIRING DIAGRAM ....................................................................................................................18
4.7 ELECTRICAL INSTALLATION DIAGRAM......................................................................................18
CONTROL AND PROGRAMMING .........................................................................................................19
5.1 CONTROL PANEL.......................................................................................................................19
5.2 FUNCTION OF THE KEYS ...........................................................................................................19
5.3 DISPLAY.....................................................................................................................................20
5.3.1 DISPLAY DESCRIPTION ......................................................................................................20
5.3.2 SYMBOLS...........................................................................................................................20
5.3.3 SYMBOLS IN THE APPLIANCE'S OPERATION.....................................................................21
5.4 PUTTING INTO OPERATION ...................................................................................................... 21

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5.5 OPERATING MODES..................................................................................................................22
5.5.1 ECO MODE ........................................................................................................................22
5.5.2 AUTO MODE .....................................................................................................................23
5.5.3 BOOST MODE....................................................................................................................23
5.5.4 TCC MODE.........................................................................................................................23
5.5.5 LAT MODE.........................................................................................................................24
5.6 ADDITIONAL FUNCTIONS..........................................................................................................24
5.6.1 DISINFECTION MODE........................................................................................................24
5.6.2 HOLIDAY MODE ................................................................................................................24
5.7 MENU........................................................................................................................................ 24
5.8 CHANGING THE MODE .............................................................................................................25
PROPER OPERATION TEST ...................................................................................................................25
DESCRIPTION OF PARAMETERS...........................................................................................................25
ERROR MESSAGES TABLE .................................................................................................................... 27
TEMPERATURE SENSOR PARAMETERS................................................................................................ 28
TROUBLESHOOTING ............................................................................................................................29
MAINTENANCE OF THE APPLIANCE.....................................................................................................30
11.1 GENERAL MAINTENANCE .........................................................................................................31
11.2 DRAINING WATER FROM THE TANK.........................................................................................31
11.3 MAGNESIUM ANODE................................................................................................................31
11.4 CLEANING OF PRESSURE CONTROL VALVE...............................................................................32
11.5 CONDENSATE DRAIN ................................................................................................................32
11.6 CLEANING THE VENTILATION CIRCUIT .....................................................................................32
11.7 THERMAL FUSE ......................................................................................................................... 32
* 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.
Meaning of pictograms used in the Manual
Important information for heater users.
Abiding by the recommendations of the manufacturer serves to ensure trouble-free operation
and the long service life of the product.
Caution!
Important notice to be observed.

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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 INFORMATION PRIOR TO THE INSTALLATION
The electrical installation must comply with the valid national legislation applicable to electrical
installations.
AQUA HP will work only after adding the correct dose of coolant.
The maximum recommended pressure of water supplied into the hydraulic circuit is 0.3 MPa,
and the minimum pressure is 0.1 MPa.
Power is AC 230 V, 50 Hz and the power cord must be connected to a grounded receptacle.
If the power cord is damaged, it must be replaced by the manufacturer or a trained service
technician in order to prevent any risk.
AQUA HP shall only be operated if the water heater is filled with water.
Heating other than potable water is not allowed.
1.2 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

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During installation:
•The installation of the water heater with heat pump must be performed by a qualified installer
who has been properly trained and qualified to this activity.
•The appliance must not be installed in locations where there is a risk of damage from impact, shock
or explosion.
•Do not unpack the appliance from the package until it is located at the installation site and is ready
for installation.
•Before connecting the appliance to the power, make sure that all hydraulic connections
are watertight.
Maintenance of the appliance:
•Maintenance of the appliance must be performed by a service technician with the exception
of regular and continuous cleaning that should be performed by the user him/herself.
•During maintenance, the appliance equipment must be disconnected from service.
•The manufacturer recommends regular annual inspection of the appliance by a qualified technician.
•Cleaning and maintenance must not be performed by children without proper supervision.
High pressure and temperature:
•The principle of operation of this appliance is associated with high temperature and high pressure.
Contacting the appliance must be done carefully so as to avoid the risk of burns and injuries
by protruding parts.
Coolant
•The coolant used in the cooling circuit is R134a, CFC free, non-flammable and without harmful effects
on the ozone layer.
•However, in accordance with the law, the liquid from the appliance must not be discharged freely
into the environment.
•The liquid in the appliance may only be handled by a qualified technician.
Information for customer
•The installer must inform users about the operation of the appliance, its dangers and responsibilities
of the user.

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SPECIFICATIONS
2.1 COMPONENTS
AQUA HP 250 I/IX

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The cooling circuit located in the upper part is responsible for the transfer of heat from the ambient air
into the water.
2.2 HEAT PUMP PRINCIPLE
Fan
Compresor
Expansion
valve
Evaporator
Ambient air exhaust
(exhaust duct)
Capacitor
HOT WATER RECEPTACLE

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1. The coolant R134a is compressed in a highly efficient compressor that increases its pressure
and temperature.
2. In a capacitor that is not in direct contact with water, the thermal energy contained in the coolant
is transferred to the water in the hot water storage tank.
3. Condensed liquid flows from the expansion valve that is responsible for a drop in its pressure.
4. The fluid absorbs thermal energy from the air flowing through the evaporator with the help of a fan.
R134a is a HFC coolant, and therefore does not damage the ozone layer. It is characterized
by excellent chemical and thermal stability, low toxicity, is not flammable and is compatible
with most materials.
2.3 TECHNICAL PARAMETERS
Unit 250 I
Type of appliance
Water heater with heat pump
Hot water volume
L
250
Weight without water
kg
83
Material of upper part
-
Stainless steel
Tank shell material
-
Steel sheet
Insulation
-
Polyurethane foam 50 mm
Mg anode
-
1”
Maximum service temperature
°C
80
Maximum service pressure
MPa (bar)
7
Test pressure
MPa (bar)
10
Heat loss
kWh/ annum
0,99
Tubular heat exchanger (diameter / length)
m
- / -
Exchanger power output 1)
kW
-
IP Protection
-
IPX1
Supply voltage
-
1/N/PE ~ 230V/50Hz
Input (medium / maximum)
W
400 / 700
Output of the electrical heating element
W
1500
Heat pump output
W
1800
Fan input
W
65
Maximum service current
A
3.2 + 6.8 (with backup electrical heating)
Recommended breaker
-
16A (sensitivity 30 mA)
Max temperature of hot water for heat pump
°C
55
Max temperature of hot water for heating element
°C
65
Coolant
-/kg
R 134a / 1.2
Load profile
-
XL
COP 2)
-
3.24
Heating time 2)
HH:mm
6:48
Volume of usable water 40 °C 2)
l
314
Energy efficiency class
2)
-
A+
Energy efficiency 2)
%
138
Annual energy consumption 2)
kWh . a-1
1251
Ambient temperature limit values
°C
-5 / 40
Acoustic pressure level
dB(A)
51
Airflow
m
3
/h
450
Maximum length of air technical manifold
m
10

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a) Temperature of heating water (90/80 °C); hot water temperature (10/60 °C)
b) Temperature of heating water (70/60 °C); hot water temperature (10/60 °C)
2) A20/W10-54, according to EN16147 and applicable regulation No. 812/2013
TRANSPORT
The appliance must be transported to the installation site in the original packaging and must be
transferred in an upright position. When handling the appliance, proceed with maximum
caution to avoid the collision that could damage any part of the appliance. Make sure that the
transport belts or straps do not cause material damage. For transportation, always use suitable
means of transport (pallet truck, forklift, etc.).
The packaging contains the following information symbols:
INSTALLATION
4.1 SAFETY AND CONTROL DEVICE
4.1.1 Low-pressure/high-pressure fuse
In preparation for operation outside the recommended operating pressures defined by the manufacturer,
the appliance switches off and the electronic panel displays an error.
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.
Fragile, handle with extreme caution
Make sure that the arrow always
points upwards
Keep the packaging dry
Do not stack the packaging

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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 enamelled and also contains magnesium anode which needs to be checked
regularly, as recommended by the installer or service technician.
4.1.5 Expansion tank *
Expansion tank is a device whose purpose is to compensate for the increase and decrease in water volume
due to temperature fluctuations.
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 system allows for protection against any non-standard situations: cooling water heater, reverse
flow of warm water back into the water main, emptying the hot water heating tank and pressurisation.
The safety valve should be calibrated to the opening pressure of 0.6 MPa. To discharge water from the hot
water tank it is necessary to close the inlet valve and open the drain valve. The drain pipe of the safety valve
should be drained into sewers by transparent hose, since water may drip or even drain off the valve.
The safety valve must be regularly opened to remove impurities and to control its patency. The drain pipe
must be installed in an area protected from frost.
4.1.7 Pressure control valve*
Pressure control valve must be installed in case of high pressure on cold water connection in order to ensure
the proper operation of the safety valve. The connection may be provided with a pressure gauge to check
the pressure.
* Parts that are not delivered by the manufacturer. Their delivery and installation must be performed
by the installer.

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4.2 LOCATION
When placing the appliance to the installation site, keep in mind possible future service calls. To avoid having
to leave too much space behind the tank, the magnesium anode is disposed on the front side of the hot water
storage tank.
Make sure that the following minimum space is available around the appliance:
Adjust the levelling legs of the appliance. Acceptable is the tilt angle 1° rearward.
If the appliance is tilted in a different direction
than backwards, condensates are going to be
settled in the appliance.

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4.3 INSTALLING AIR INTAKE/EXHAUST
Since AQUA HP absorbs heat during operation, it is good to route cooled air (intake/exhaust)
to unheated spaces. The appliance will cool the room in which it is located and if it is installed
in heated rooms, cooled air should be routed to other rooms or outside.
4.3.1 Installation without air piping
The AQUA HP appliance should be installed in a location that is not too heated and can be used
for dehumidification and cooling these areas (e.g. laundry rooms, basements, etc.). The distance between
the top of the unit and the ceiling should not be less than 600 mm.If the distance between the unit
and the ceiling is less than 600 mm, it is necessary to install two elbows, as shown in the figure.

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4.3.2 Installation with air piping
If you use piping for airflow into spaces that do not require heating, you can:
Use the outside air
Using outdoor air, the unit can be placed either in heated or unheated room.
Use air from an adjacent room
The unit can also be placed in a heated room, but airflow should be directed to an unheated room. Keep in
mind that because of the air flow, cooling of an unheated room might affect adjacent heated rooms.
UNHEATED AREA
Min 50 m3
HEATED OR UNHEATED
AREA

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Use air from an adjacent room and outside air
To supply air to the appliance, branched pipe can be used. In summer, you can use hot air from the outside
and in winter you can use the air from the unheated area.
Pipes used for air flow is not part of the appliance, and its installation is a matter of the installer;
if necessary, follow the recommendations of the manufacturer.
The pipe diameter must be 160 mm. Pipe length should not exceed 8 meters.
UNHEATED AREA
Min 50 m3
HEATED OR UNHEATED
AREA

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4.4 PLUMBING FIXTURE
EXPLANATORY NOTES
[1] Shutoff valve
[2] Pressure control valve (3 bar/0.3 MPa)
[3] Return valve
[4] Safety valve (6 bar/0.6 MPa)
[5] Sink drain
[6] Expansion receptacle
[7] Drain valve
[8] Circulation pump
[9] Thermostatic mixing valve
[A] Cold water connection
[B] Hot water outlet
[C] Circulation

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Safety valve has to be installed on the cold water inlet into the appliance. The safety device must
comply with EN 1487: 002, maximum pressure of 6 bar (0.6 MPa). No closing armature may be
mounted between the safety valve and the tank or check valve that could disable the safety
valve.
The safety valve must be connected via a line whose diameter is smaller than the connecting
dimension. The drain must be connected to a sewage siphon or, if this is not possible, raised
to a distance of at least 20 mm from the pavement to enable visual inspection.
Pressure control valve set to 3 bar (0.3 MPa) must be installed in case of high pressure
on the cold water connection.
The manufacturer is not liable for any damages related to failure to observe these
recommendations and warnings.
Water you use may contain contaminants or substances damaging the appliance and even
harmful to your health. Make sure that you use water with a level of quality equivalent to the
consumption in your household. The following table lists some of the parameters that must
be chemically treated if exceeded.
4.5 CONDENSATE
During operation, condensation may occur. The condensate flows into a drip tray and is discharged through
a hole on the back side. The person performing the installation must connect the condensate hose supplied
by the manufacturer and direct the condensate into a drainage system or a sewer siphon.
The condensate hose must not be bent or compressed, and must be installed so as to best
ensure proper drainage of the condensate.
Hardness (ºdH) 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

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R1 - Backup electrical heating HP - High pressure switch LP - Low pressure switch
M - Compressor TB - Thermal fuse F1 - Compressor fuse (10 A)
F2 - Main fuse (10 A) S1 - Water temperature sensor S2 - Ambient sensor
S3 - Evaporator temperature sensor Fan – Ventilator V4V - 4-way valve
4.6 WIRING DIAGRAM
Water heater with heat pump can be connected to power only when the tank is filled with water.
Water heater with heat pump is supplied with a cable for connecting to a prepared grounded receptacle
(1/N/PE 230 V/50 Hz).
Wiring installation must conform to the standards applicable in the country or territory where the heater
with heat pump is installed.
The installation involves:
•Bipolar circuit breaker and Cu-cable with 3 x 2.5 mm2cross-section or greater
•Protective current device 30 mA
If the power cord is damaged, it must be replaced by the manufacturer or a trained service technician with
similar qualification.
4.7 ELECTRICAL INSTALLATION DIAGRAM

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CONTROL AND PROGRAMMING
5.1 CONTROL PANEL
The Eco control panel of the appliance is simple and intuitive. It allows you to configure several operating
parameters according to the operating mode selected by the user.
It includes six control keys (ON/OFF / CANCEL MENU, ▲COMP, E-HEATER and OK DISINFECT and OK / LOCK)
that enable checking the operation of the appliance, monitoring the parameters and their change.
5.2 FUNCTION OF THE KEYS
Key Function Description
ON/OFF
CANCEL
ON/OFF Switch Turning the controller on and off
(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)

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ECO
5.3 DISPLAY
5.3.1 Display description
5.3.2 Symbols
Symbol Description
Appliance in ECO service mode
Appliance in AUTO service mode
Appliance in BOOST service mode
Timer clock control ON
Low ambient temperature protection ON
Compressor ON
Fan ON
Electrical backup ON
4-V
4-way valve ON
Keypad enabled
Keypad disabled
Disinfection function ON
Defrost function ON
Holiday mode ON
Error alert
AUTO
BOOST
TCC
LAT
45 ºC
12/10/1210:25
Er01
-S1 -
LAT
ECO BOOSTAUTO TCC