Orca ZEUS ZSW 230 Mounting instructions

I
INSTALLATION, MAINTENANCE AND USER MANUAL
Domestic hot water heat pump
ORCA ZEUS ZSW 230 and ZSW 300
V1_2022

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Manuals are made for different series of devices. Because of that reason there could be some differences between
real parameters, dimensions or pictures.
We reserve the right to change the technical or any other specifications without notice and without liability. We do
not take responsibility for typographical errors.
This work is copyrighted. Any use outside the boundaries of the copyright law without the consent of Orca Energija
d.o.o. is illegal and punishable by law. With this release, all previous versions are invalid. liability. We do not take
responsibility for typographical errors.

1
CONTENT
1BASIC INFORMATION ...................................................................................................................................2
2SAFETY WARNINGS......................................................................................................................................2
3IMPORTANT WARNINGS ..............................................................................................................................3
4PURPOSE OF THE DEVICE...........................................................................................................................5
5RESPONSIBILITY ...........................................................................................................................................5
5.1 Producer responsibility.........................................................................................................................5
5.2 Installer responsibility...........................................................................................................................5
5.3 User responsibility ................................................................................................................................5
6REFRIGERANT...............................................................................................................................................6
7RECYCLING....................................................................................................................................................6
8UNIT SPECIFICATIONS .................................................................................................................................7
9TRANSPORT AND DEPOT ............................................................................................................................8
10 UNIT DIMENSIONS.........................................................................................................................................9
11 UNIT INSTALLATION ...................................................................................................................................10
12 WATER CONNECTION ................................................................................................................................12
12.1 Galvanic cell.........................................................................................................................................13
13 TRIAL OPERATION......................................................................................................................................14
13.1 Confirmation before trial operation ...................................................................................................14
14 UNIT SETTINGS ...........................................................................................................................................15
15 OPERATION INSTRUCTIONS .....................................................................................................................15
15.1 Function of wire controller .................................................................................................................15
15.2 Operations............................................................................................................................................16
15.3 Turn ON/OFF the unit ..........................................................................................................................17
15.4 Mode selection .....................................................................................................................................18
15.5 Time setting..........................................................................................................................................19
15.6 In the vacation mode ...........................................................................................................................23
15.7 Electric heater setting .........................................................................................................................24
15.8 Fan mode setting .................................................................................................................................24
15.9 Keyboard locking.................................................................................................................................25
16 PCB BOARD CONNECTIONS .....................................................................................................................26
17 TROUBLESHOOTING ..................................................................................................................................26
18 ELECTRIC SCHEME ....................................................................................................................................27
27
18.1 Temperature sensor resistance .........................................................................................................28
19 UNIT COMPONENTS....................................................................................................................................29
20 MAINTENANCE, MALFUNCTION AND SOLUTIONS.................................................................................31
20.1 Maintenance by the user.....................................................................................................................31
20.2 Regular annual maintenance..............................................................................................................32
20.3 Malfunctions and resolutions.............................................................................................................32

User manual ZEUS
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1BASIC INFORMATION
•The enclosed installation, maintenance and user instruction manual contains all information for safe
installation, maintenance and use of the device. BEFORE USAGE, PLEASE READ THIS MANUAL
CAREFULLY!
•Store this instruction manual in a safe and dry place, if possible, somewhere near the unit. The installation
manual must be kept in full legible condition during the lifespan of the device.
•The device must be installed and connected according to this manual. IF YOU ARE NOT ABSOLUTELY
SURE, THAT THE DEVICE IS CORRECTLY INSTALLED AND CONNECTED, DO NOT TURN THE DEVICE ON!
•Maintenance must be regularly carried out in time intervals, prescribed by the manufacturer.
Maintenance can only be carried out by suitably qualified and authorized service personnel. INADEQUATE
AND UNAUTHORISED MAINTENANCE LEADS TO THE LOSS OF WARRANTY RIGHTS!
•The installer is obliged to explain to the end user how the device is properly used and maintained in
accordance with this manual.
•THE MANUFACTURER SHALL NOT BE LIABLE FOR ANY DAMAGE CAUSED BY IMPROPER OPERATION OF
THE DEVICE AS A RESULT OF IMPROPER INSTALLATION AND MAINTENANCE!
•The manufacturer reserves the right to modify the installation, maintenance and user manual without
prior notice. If you lose or damage the manual (in unreadable condition), contact the manufacturer or the
retailer where you purchased the device.
2SAFETY WARNINGS
Read the instructions bellow carefully. In order to avoid any damage to persons, animals or plants, use the
device only in accordance with the instructions. The magnitude of danger is highlighted by graphic symbols
with the corresponding description.
WARNING!
Failure to follow the instructions can lead to injury or damage to the device. Failure to follow the
instructions will lead to a loss of warranty.
DANGER!
Failure to follow the instructions can lead to injury or damage to the device. Improper use can lead
to serious injury or even death. Improper use can be harmful to humans, animals and the
environment.
DANGER!
Failure to follow the instructions can lead to serious injuries or even death due to an electric shock.
DANGER!
Failure to follow the instructions can lead to device ignition or fire.
DANGER!
Failure to follow the instructions can lead to serious injuries to the extremities.
DANGER!
Failure to follow the instructions can lead to serious burns.
DANGER!
Exposure to specific device parts or refrigerant can lead to frostbite.
DISPOSAL INSTRUCTIONS!
NOTE
Contains useful information and recommendations.

User manual ZEUS
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3IMPORTANT WARNINGS
WARNING!
The unit can only be used for purposes prescribed by the manufacturer.
WARNING!
Only an adult person acquainted with the content of this manual, can operate the device.
DANGER!
Unit Installation, first start-up, service and maintenance must be performed by a qualified installer and always
in non-electrically supplied condition.
NOTE
Install the device in a room/place, where there is enough space left around the device for cleaning and
maintenance purposes. Consider the space for installation (recommended space requirements).
DANGER!
Never incline the device for more than 30°from its vertical position or transport/carry it by hand. To move the
device, use only proper transport equipment.
WARNING!
Do not install the unit in a space where the temperature can fall below 0°C, water in the pipes and unit can
freeze and cause damage to the unit or pipes.
WARNING!
The unit must be installed in a dry space, if it is exposed to direct sunlight, it must be protected from it.
DANGER!
During operation it is forbidden to move, clean or repair the unit.
DANGER!
Do not put any object below or on the unit.
WARNING!
Connect the unit to the system using removable pipe unions, so that the unit can be easily moved or removed
in case of a service intervention without the need of a greater intervention in the piping system.
DANGER!
If the intended installation location of heat pump is in room, where there is a lot of dust or ash, possibility of
leakage of volatile and flammable or other undesirable substances, wood or pellet stove, it is required to
ensure air intake for the heat pump from another room. Ash and dust are deposited on the evaporator, which
can lead to disturbances in operation or damage to the heat pump.
DANGER!
Non-
return valve and dirt trap are necessary to install on the inlet tube. Also, it is necessary to install
appropriate expansion vessel. It is MANDATORY to install safety valve (0,6 MPa) on the hot water outlet tube.
Maximum allowed supply pressure is 0,4 MPa.
WARNING!
When connecting the unit to the heating system it is necessary to prevent the formation of a galvanic couple
and related corrosion. To connect the unit to the heating system it is MANDATORY to use the enclosed
transition pieces, also the piping system MUST be electrically grounded. In case of failure due to improper
device connection the manufacturer will take no liability or warranty.
DANGER!
In case of power supply cable damage, smoke, unusual smell from unit or any other abnormality in operation,
immediately disconnect the power supply cable from the supply and contact an authorized customer service.
DANGER!
Do not insert your fingers through the intake/exhaust gratings. Rotating parts of the device can injure you.
DANGER!
The unit requires reliable grounding during operation, otherwise serious injuries or even death may occur.
DANGER!
The unit needs to be connected to the power supply protected with the prescribed fuse.

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DANGER!
In the event of damage to the connecting cable, i
t must be replaced with original cable, provided by
manufacturer or authorized customer service.
DANGER!
Do not use or store flammable materials near the unit
DANGER!
Water with temperature above 50°C can cause injuries, when set temperature is higher than 50°C be careful
when children and other users are using hot water.
DANGER!
Evaporator operates at low temperature. Touching it can cause frostbite.
DANGER!
Never damage or rupture the refrigerant piping. Refrigerant leakage can cause serious frostbite.
DISPOSAL INSTRUCTIONS!
The unit must be replaced and disposed according to local regulations; it contains environment potentially
harmful gasses.

User manual ZEUS
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4PURPOSE OF THE DEVICE
The device is an air/water heat pump with a water storage tank below. Its primary task is to heat sanitary
water – the cooling effect on the surroundings is a side effect. The heat pump needs to be set in a sufficiently
large and ventilated room with an enough high air temperature (basement, pantry) from which it will take the
energy for its operation. The heat pump draws 75% of the necessary heat from the air, the rest is provided by
the electrical power that drives the high-quality rotary compressor. The sanitary water is heated through a
refrigerant heat exchanger (condenser) bended around the water storage tank. The water storage tank is
made from steel with vacuum enameled protective coating. Its volume can be 230 or 300L. The 230L unit is
meant to be installed in a building with a daily consumption not more than 500L per day and 300L unit in a
building with consumption not more than 700L per day.
WARNING!
Injuries and resulting damage to the device or third things, which are caused due to misuse and
improper use of the device, are the users sole responsibility.
5RESPONSIBILITY
5.1 Producer responsibility
As a producer we accept no responsibility if:
-The installation and user manuals were not considered properly.
-Unit was not correctly or enough maintained.
5.2 Installer responsibility
Installers take responsibility that the unit is installed and commissioned in accordance with the next
requirements:
-Read the complete installation and user manuals.
-Installation of the unit must be performed according to national standards and laws.
-Performs commissioning and solves any problems that occurred during the installation and first startup.
-Explains to the customer proper usage, settings and needed unit maintenance.
5.3 User responsibility
User needs to consider next requirements for proper unit operation:
-Read the complete installation and user manuals.
-Installation and first startup must to be performed by a professional and authorized installer.
-Regular service from an authorized person needs to be allowed / ordered.
-Keep these manuals in a safe dry place, somewhere near the unit.
-For any uncertainty ask the installer for explanation.
-Any modifications or replacement of components of the heat pump EXCLUDES LIABILITY of the
manufacturer for the safety and functionality. In case of misuse and improper use of the device, the
manufacturer does not accept liability. Injuries and resulting damage to the device or third things, which
are caused due to misuse and improper use of the device, are the users sole responsibility.

User manual ZEUS
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6REFRIGERANT
The unit is prefilled with HFC R134a refrigerant. The refrigerant is non-toxic, non-flammable and not explosive,
is also not harmful to the ozone layer, but is heavier than air, which can lead to a crowding-out of air from the
area. The result may be smaller concentration of oxygen in the air, but because of a very small amount of
refrigerant in the unit, there are no serious health risks. A reduced concentration of oxygen can occur only in
unventilated areas less than 10 m3 volume. Nevertheless, we recommend that you read the manufacturer's
refrigerant safety sheet and handle in accordance with the written instructions.
DANGER!
Refrigerant leakage can cause serious frostbite. In case of refrigerant leakage immediately
disconnect power supply and inform the authorized customer service. Do not approach the device,
only when necessary (to disconnect the power supply).
7RECYCLING
1. Waste Product: Consult the manufacturer regarding recycling or disposal.
2. Contaminated packaging: reuse or recycle after decontamination.
3. Removing the refrigerant must be performed in accordance with EC Directive 842/2006, as well as other
national and local regulations.
DISPOSAL INSTRUCTIONS!
The unit must be replaced and disposed according to local regulations; it contains environment
potentially harmful gasses.

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8UNIT SPECIFICATIONS
MODEL ZSW 230 (0) 230 (1) 300 (0) 300 (1) 300 (2)
Nominal heating power kW 1,8 1,8 1,8 1,8 1,8
Max. heating power (Compressor+el.
heater)
kW 3,6 3,6 3,6 3,6 3,6
Compressor nominal power
consumption
kW 0,5 0,5 0,5 0,5 0,5
Compressor typ rotary rotary rotary rotary rotary
Coefficient of performance W/W 3,0 3,0 3,1 3,1 3,1
Electric heater power kW 1,8 1,8 1,8 1,8 1,8
Power supply f/Hz/V 1/50/230 1/50/230 1/50/230 1/50/230 1/50/230
Degree of protection IPX IPX2 IPX2 IPX2 IPX2 IPX2
Refrigerant/quantity Typ/g R134a /
1000
R134a /
1000
R134a /
1000
R134a /
1000
R134a /
1000
Tank volume L 230 230 300 300 300
Surface of bottom heat exchanger m2 / 0,5 / 1 1
Surface of upper heat exchanger
(optional)
m2
/ / / / 0,5
Air flow m3/h 500 500 500 500 500
Air connection dimensions mm 150 150 150 150 150
Maximal length of air ducts m 10 10 10 10 10
Unit dimensions D x H
(mm)
670 x
1550
670 x
1550
670 x
1820
670 x
1820
670 x
1820
Max. water outlet temperature °C 60°C 60°C 60°C 60°C 60°C
Working range °C -3~35 -3~35 -3~35 -3~35 -3~35
Water connection dimensions ˝ 3/4 3/4 3 /4 3 /4 3 /4
Unit net weight kg 110 110 130 (140) 130 (140) 130 (140)
* According to SIST EN16147 standard

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9TRANSPORT AND DEPOT
DANGER!
The device can only be moved or transported in non-electrically supplied condition.
WARNING!
The aggregate of the device is attached on the top of the water storage tank and it is
protected with a plastic cover. The cover must not be used as a holding or support point
when the unit is being transported.
WARNING!
THE DEVICE MUST BE PROPERLY PROTECTED WITH COMPULSORY PROTECTIVE BELTS WHEN
TRANSPORTED IN ORDER TO PREVENT JUMPING, MOVING OR OVERTURNING.
WARNING!
Before transport the device must be properly protected by protective foil or cardboard to avoid
damage such as scrapes, abrasions and holes.
WARNING!
Because of the device’s construction (the aggregate being on top) there is a high risk of the
device overturning during transport. The max incline of 30° must not be exceeded.
WARNING!
Do not exceed the maximum inclination of 30° from vertical.
WARNING!
The allowed temperature during transport and depot is between 10 and 45°C. During shorter
periods of time (up to 24h), a higher temperature is allowed (up to 55°C).
DANGER!
Because of the devices weight there is a high risk of injury to the extremities when moving the
device. When moving the device, only use proper transport equipment.
WARNING!
For damage to the device, due to improper depot and transport, the manufacturer will take no
liability!

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P.
ZSW 230 (1)
ZSW 300 (2)
1
125 mm
125 mm
2
365 mm
365 mm
3
730 mm
730 mm
4
830 mm
840 mm
5
745 mm
905 mm
6
/
970 mm
7
/
1180 mm
8
980 mm
1270 mm
9
1550 mm
1820 mm
10
670 mm
670 mm
A
Water inlet (Z)
Water inlet (Z)
B
Solar outlet (N)
Solar outlet (N)
C
Mg. Anode
Mg. Anode
D
Solar inlet (N)
Solar inlet (N)
E
Circulation (N)
Circulation (N)
F
Mg. Anode
Mg. Anode
G
El. heater
El. heater
J
Water outlet (Z)
Water outlet (Z)
10 UNIT DIMENSIONS
All connections are 3/4"
(N) – inner thread
(Z) – outer thread
Air duct connections have a diameter of 150mm. Connection pipes need to have the same
diameter or bigger.
Position marked with »E« is meant for water return form the circulation system. When the
circulation system is not connected, this connection needs to be sealed with a tap.

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11 UNIT INSTALLATION
Minimal space requirements for installation and maintenance
The unit must always be installed in a vertical position. We recommend that the unit is inclined 2-3° backwards
to enable smoother condensate runoff.
WARNING!
After placing the unit in its final location, wait at least 1 hour before turning the unit on.
WARNING!
In case of service intervention and if minimum clearances are disregarded, the user covers the costs
incurred.
Min. one elbow is required. Because the inlet and outlet air connections are very close together, there is a
possibility of cold air recirculation, the device will go to defrost mode more often.
WARNING!
Good insulation of neighbouring walls is advisable.

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Installation possibilities:
WARNING!
Maximal length of air ducts is 10m. Each bend 90°reduces the maximal length for 1 m. All air duct
pipes need to be insulated to prevent condensation. Never reduce the internal diameter of the pipe.
When the air inlet and outlet are in a
different space, each space needs to have
an opening to the outside or they need to
be connected with an opening surface at
least 300mm2
to be able to equalize
pressure.

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12 WATER CONNECTION
The cold-water connection must be performed according to the scheme above. The maximum allowed
pressure in the water system is 0,4 MPa, a safety valve with a maximum pressure 0,6MPa can be used.
Expansion vessel for the 230L tank needs to have at least 12L volume and for the 300L tank 18L.
Hot water connection can be directly to tap, or can be upgraded with a circulation pump. Return from the
circulation system can be connected to the connection marked with “E” in scheme “10. Unit dimensions”.
During rapid water heating, a small water leakage on the safety valve can occur. This is not due to damage but
due to normal event of water expansion. This water needs to be captured and lead into drainage.
In case of a solar system or other heat source connected to the internal heat exchanger, it must be assured
that the pressure in the heat exchanger newer exceeds 0,5MPa. It must also be assured that the water does
not exceed 80°C. Damage to internal components or heat pump can occur.
In case that the additional heat exchanger is not to be used, it needs to be filled with glycol to prevent
corrosion. It is not allowed to close both sides of the heat exchanger to enable pressure equalization.
WARNING!
Improper installation of the unit can lead to damages or malfunction of the unit and loss of rights
under warranty.
WARNING!
Connect the unit to the system using removable pipe unions, so that the unit can be easily moved or
removed in case of a service intervention without the need of a greater intervention in the piping
system.
WARNING!
When connecting the unit to the heating system it is necessary to prevent the formation of a
galvanic couple and related corrosion. To connect the unit to the heating system it is MANDATORY
to use the enclosed transition pieces, also the piping system MUST be electrically grounded. In case
of failure due to improper device connection the manufacturer will take no liability or warranty.
WARNING!
Before the unit is turned on, it needs to be filled with water and the system completely vented. To
do this, open all hot water taps and wait until water starts to flow from all of them.
WARNING!
On the back side of the unit there is a pipe connection for condensate drain. At high water usage
and high air humidity, more than a few litres of condensate water per day can occur, so this
connection must be connected to outlet drainage. This pipe needs to have a constant incline of at
least 1° and must be always clean.

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WARNING!
Condensate pipe must be checked and cleaned once per month.
DANGER!
The supply socket must be positioned at least 1,5m above ground level, to avoid direct water spray
causing injuries or damage. The socket must be earthed, secured with a 16A fuse and FI relay with
max. current 0,03A. The wire cable to the socket needs to be at least 3x2,5 mm, only the heat pump
can be connected to the socket.
12.1 Galvanic cell
DANGER!
Prevent corrosion due to formation of a galvanic couple, the heat pump must be properly
connected to the system. Fittings are enclosed with the heat pump to connect the cold and hot
water pipes to the heat pump.

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13 TRIAL OPERATION
13.1 Confirmation before trial operation
1) All the installation preparations are complete.
2) Water heater is installed correctly.
3) The pipelines and wiring connections are correct.
4) The accessories are installed correctly.
5) The drainage is unblocked.
6) The thermal insulation is intact.
7) The earthing wire is connected correctly.
8) The power voltage is consistent with the rated voltage of the heater.
9) There is no obstacle at the air inlet and outlet of the unit.
10) All of the electric protection is working correctly.
11) The water tank is full.
CAUTION ：
Before using this unit, please follow the steps below.
Adding water: If the unit is used for the first time or used again after emptying the tank, please make sure that the
tank is full of water before turning the power on.
NOTE
The ball valve at water inlet should be open when the unit is in operation.
WARNING!
Operation without water in the water tank may result in damage of auxiliary electrical heater. Due
to such damage, the supplier is not responsible for the quality issue.
DANGER!
Water over 50°C may cause serious burns or death. Special care should be paid to children, the
disabled and the elderly.
WARNING!
Failure to abide with the above instructions can lead to device malfunction or failure and serious
material or human damage. In this case rights under warranty are lost.

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14 UNIT SETTINGS
When the unit is connected to the water system and filled with water, it can be connected to the power supply.
Power supply can only be plugged into a grounded socket (16A, 230V / 50 Hz).
15 OPERATION INSTRUCTIONS
15.1 Function of wire controller
No
Button
Name
Function
1 ON/OFF Turn on/off the unit.
2 Mode Switch unit running modes or save setting parameters.
3 Clock Set the clock or the timer.
4 Electric heater Turn on/off the electric heater or switch fan modes.
5 Up Move up or increase parameter values.
6 Down Move down or decrease parameter values.
Auxiliary display area
Main display area

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15.2 Operations
Status icon
Name
What it means
Heating
Shows that the unit is in heating mode. Compressor is in operation. If the
set temperature is not achieved the electric heater turns on.
Eco, Heating
Shows that the unit is in eco heat
ing mode. Eco mode is recomended, if
the room temperature is 18°C or more.
Vacation
Shows that the unit is in
vacation mode.
Cooling
Shows that the unit is in cooling mode.
Fan
Shows that the fan is on and the speed of the fan.
Electric heater
Shows that the electric heater is on.
Set temperature
acheved
Shows that the water temperature has reached the target point and the
unit shuts off automatically.
Parameter
setting
Shows that the water temperature has reached the target point and the
unit shuts off automatically.
Temperature
Shows
that the temperature is non-adjustable (measured value).
Timer & ON
Shows that the unit will be turned on by the timer automatically.
Timer & OFF
Shows
that the unit will be turned off by the timer automatically.
Minute
Shows that the main display area
displays the minutes.
Second
Shows that the main display area displays the seconds.
Cetigrade
Shows that the temperature in Main display area or Auxiliary display
area is in
℃.
Faradej
Shows that the temperature in Main display area or Auxiliary display
area is in
℉.
Lock
Show that the keyboard is locked.

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15.3 Turn ON/OFF the unit
Press and hold for 0.5s in the standby interface of the wire controller to turn on the unit and at this
time the main display area shows the water outlet temperature.
Press and hold for 0,5s in the running interface of the wire controller to turn off the unit an at this time the
main display area shows OFF.
Note. The ON/OFF button can only be used to turn on/off the unit in standby or running interface of the wire
controller.
Heating mode
Press and hold for 0,5s
Standby interface
Outlet water temperature
Inlet water
temperature
Running
interface

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15.4 Mode selection
Press , to select the mode from Heating, Eco heating, Intelligent, Vacation in the standby or running interface.
In the standby or running interface press or once to check the target temperature of the outlet water.
Press or again to change the target temperature. After making the changes to the parameter, press
to confirm or cancel the changes, then return to the previous interface. If no operations are performed
on the keypad for 0,5s, the controller exits the parameter modification menu by time out and the changes are
confirmed.
Example: Change the target temperature from 50 to 55,5 when the actual outlet water temperature is 18 °C.
Outlet water temperature
Time
Heating mode
Eco heating mode
Vacation mode
Date
Intelligent mode
Press
Press
Press