Hewalex PCWU 200K-2.3kW User manual

Instruction manual
Contents
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Heat pump
water heater
PCWU 200K-2.3kW
PCWU 300SK-2.3kW
General
1. Safety rules for installation.......................................................................................
2. Warranty terms........................................................................................................
3. Recycling and utilization...........................................................................................
4. Environmental requirements ...................................................................................
Operation instruction (for user)
1. General ....................................................................................................................
2. Cost saving...............................................................................................................
3. Heat pump structure ...............................................................................................
4. Controller instruction ..............................................................................................
4.1 Driver map .........................................................................................................
4.2 To start the heat pump ......................................................................................
4.3 Parameter settings .............................................................................................
4.4 Controller settings ...........................................................................................
4.5 Measured parameters .....................................................................................
4.6 Info ...................................................................................................................
5. Antilegionella..........................................................................................................
6. Equipment maintenance.........................................................................................

Instruction manual
Heat pump
water heater
PCWU 200K-2.3kW
PCWU 300SK-2.3kW
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7. Operating FAQ ...........................................................................................................
8. GSM service ...............................................................................................................
Installation service instruction (for installers)
1. Storage and transportation .........................................................................................
2. Installation location selection......................................................................................
3. Installlation .................................................................................................................
3.1 Connection heat pump with other devices ...........................................................
3.2
4. Maintenance ...............................................................................................................
5.1 Air filter and air supply pipe...................................................................................
5.2 How to remove the top cover in order to clean the evaporator............................
5.3 Magnesium anode checking .................................................................................
5.4 Titanium anode checking ......................................................................................
5.5 Emptying and cleaning of the water tank .............................................................
6. Security of heat pump ................................................................................................
6.1 Evaporator defrosting ............................................................................................
6.2 Overheating protection for the tank ......................................................................
6.3 Anti-freezing protection .........................................................................................
6.4 Function of switching off heat pump automatically when COP is low....................
6.5 Compressor protection ..........................................................................................
8. Controller instruction (extended version for installers) .............................................
8.1 Driver map ............................................................................................................
8.2 Parrameter settings ...............................................................................................
8.3 Manual control .....................................................................................................
9. Alarms .........................................................................................................................
9.1 Temperature sensors .............................................................................................
9.2 High pressure and low pressure protection ..........................................................
9.3 Alarm list ...............................................................................................................
Technical data
1. Dimensions .................................................................................................................
2. Parameter table...........................................................................................................
3. CE certyficate...............................................................................................................
4. Performance charts.....................................................................................................
5. Electrical diagram .......................................................................................................
Gwarancja i serwis
1. Warranty card ............................................................................................................
Air supply ..............................................................................................................
3.3 Power supply .........................................................................................................
3.4 Condense discharge ..............................................................................................
7. Disconnect the unit from main power supply ............................................................

General
1. Safety rules for installation
In order to avoid danger to users and installers, the following safety rules must be strictly obeyed:
A) The heat pump integrated with water tank shall be installed by a qualified installer with specialized knowledge and electrician certificate
to 1kV. If you would like to change the location of the unit, please use the services from qualified installers as well.
B) The power supply cable of heat pump must be connected to a sokect where there is no posibility to contact water.
C) Do not install heat pump nearby the pipeline nor storage of flammable gas.
D) Make sure the heat pump is located on a foundation solid enough to support heat pump with full filled tank.
The foundation must be level for proper operation of the heat pump and please avoid tilting the unit..
F) Do NOT put your fingers in the pipeline of air inlet or outlet when the unit is running, to avoid posibility of burns, electrical shock or injuries.
G) Always disconnect the unit from power supply during maintaning or servicing.
H) Please read the manual carefully before changing settings in controller.
I) If the unit has not been used for more than 2 weeks, before restart using hot water, please firstly let the hot water run out for a few minute.
It is also recommended to heat the tank to high temperature even after this action. This is to prevent legionella infection (in the case of
Legionella heating option is disabled)..
HEWALEX does not take responsibility for accident, which is caused by improper or unsafe installation.
E) If you found any abnormality(ie, noise or smell) generated by the unit, please shut down the unit by unpluging power cable and contact our
service team for consultation.
2. Warranty terms
At the end of this manual, a warranty card with the following terms is attached. It is required all customers to complete this warranty card in order to
use it for potential warranty claims in the future.
A) It is forbidden to repair the unit without contacting HEWALEX service team. In case of any malfunction or failures, please inform us via
telephone ([email protected]). Basing on failure information provided, we will provide local service for major
malfunctions or guaidance of repairing for minor failures.
B) The heat pump must be connected to a properly functioning electrical system. Installation requirements include:
C) Water supplied for heat pump shall meet the requirments of drinking water (Journal of Laws No. 203, item. 1718):
D) Please use a safety valve with Max. 7bar limitation for the tank. The absence or misuse of safety valve may lead to damage of the tank
((32) 214 17 10) or E-mail
E)
.
The safety valve shall be checked once per month according to manufacture’s guidelines.
Installation of water, air and power supply must be in accordance with the guidelines and wiring diagram (Part installation and service
points. 3 Installation).
- Main power cable 3x1,5mm2 300/500V according to 227IEC53
- Overcurrent protection C16
- Differential protection 30mA
- Properly grounding the unit ( the resistance of grounding wire shall be less than 4Ω).
All of the above standards are common requirments of any house,so that they shall not be difficult to meet.
- pH between 6,5 and 9,5
- Conductivity lower than 2500 [μS/cm w 20°C]
- Ammonia below 0.5 [mg / l]
- Nitrates less than 50 [mg/l]
- Chloride content below 250 [mg/L]
- Copper less than 2 [mg/l, maximum value without water color change)
- Sulfates less than 250 [mg/l]
- Hardness 60-500 [mg CaCO ]
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Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

F) The tank installation shall avoid direct metallic connections with water pipelines. In case that you have to use metal connection ( ie,
copper or steel), please apply isolation devices ( ie,
.
G) Please select correct mounting position of the heat pump unit (See installation and service point 2: Select the installation location).
Damages caused by mislocation will not be covered by warranty (ie, corrosive or polluted air invasion to the heat pump, not leveling
foundation, location in an unheated room).
H) It is forbidden to disconnect power supply during heat pump operation (it means anytime when the tank is full of water). It will be the
user’s responsibility for potential tank leakage problem due to absence of the electrical titanium anode anticorrosive protection. Long-term
power down information is automatically saved in controller.
PA66 Gf30 - included as free accesories for heat pump, but also availabe from HEWALEX
offer lists)
.
3. Recycling and utilization
All components of our products are not harmful to environment. Most of them can be recycled. For the non-recyclable parts, please assure
proper utilization.
During maintenance or servicing operation, please pay attention to environmental requirements for recovery, recycling and resuing of
materials. Especially standards for arrangement of freon refrigerant based on the following documents:
DIN 8960 Freon refrigerant, requirments
DIN EN 378 Installation of refrigerating system and heat pump - requirments about safety and environmental
R134a refrigerant in our unit is non-flammable, CFC-free and shares no harm to the ozone layer.
4. Environmental requirements
Operation instruction (for user)
1. General
Heat pump is a device that is able to effectively retrieve heat from the surrounding environment. Its refrigerant works as media and absorbs
heat from the lower temperature side, then through work of compressor, it raises the temperature of media therefore to enable energy
transfer to high temeprature side and finally realize the purpose of heating. Heat pump belongs to the field of new energy sources since
averagely 70-80% of the energy for heating is taken from the environment.
The main advantage of the heat pump is that it has much lower power consumption comparing to the traditional ways of heating. If you
compare it to an electrical heater, heat pump comsumes several times lower energe input to achieve same heating capacity. The main
parameter to evaluate heat pump efficiency is called coefficient of performance (COP). Below is the explanation of how a heat pump works
and how various factors can affect the efficiency of its work.
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OPERATION HEAT PUMPS
Renowable energy
Air outlet
Air inlet
Refrigerant in a liquid state
Total
thermal
energy
Hot water inlet
Hot water outlet
Refrigerant gas
Compressor
Evaporator Condensor
Expansion valve
Electricity
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

The COP is calculated by this fomula:
The COP value generally depends on the air inlet temperature which serves as the heating source, and the rated water temperature. The
higher COP value, the better performance of the heat pump.
COP decreases as air inlet temperature dropping down, and due to the limitation of the physical character of media liquid, it will be not
possible to retrieve heat from an over-low temperature source. The same applies to the heated water temperature. Increasing the target
temperature of water or house heating will also result in reduction of COP value. Therefore, in order to get the highest efficiency of heat
pump work, optimal conditions shall be assured by providing heat pump appropriately warm air as heat source, and avoiding set
unnecessarily high target of heating temperature.
From economic point of view, since 45-50°C is the most comfortable water temperature for users, the heating target
temperature of heat pump work shall be 50°C (This is the factory setting value in our heat pump, and heating operation will start whenever
water temperature is lower than .
The essence of a heat pump is to work on the heat transmitted during phase change. So by using special refrigerant as the media liquid,
heat pump will be able to retrieve heat from air even in the cold days and heats up water with not much input work. In a certain sense, heat
pump is similar to a refrigerator, which removes heat from the cooling chamber to the outside environment. Only that the heat transfer
direction of heat pump is reversed. Heat pump takes heat from the environment and transport to the water tank.
appropriate
45°C) In other heating devices, whose efficiency is not related with heated water temperature, a common
solution is to heat the tank to higher temperature and use a mixing valve to provide user water in the comfortable temperature. However, in
the case of heat pump, such solution is not economically justified.
COP =
Heating capacity
Input power
2. Cost saving
One of the most important concerns of buying a heating device is the cost saving during usage. Especially if you are still using electrical
heater or gas boiler for hot water even in summer time, then there is a good economical reason for you to change heating device to heat
pump. While if comparing to solid fuel boiler (ie, coal boiler), we don’t take economic profit in usage as the overwhelming advantage of heat
pump, simply because the difference in water heating cost is small
The following charts show the annual costs of water heating by using various automated devices.
. However the advantage lays on automatic operation and potential cost
saving in chimney renovation due to low parameter boiler (chimney damage caused by condensation of exhaust).
COP When: 1) air inlet temperature increases
2) relative humidity is greater
3) target heating temperature of water lowers down
Parameter used for heat pump efficiency calculation is a medium COP = 3,84 (A15/W15-45, heat pump works all the year with ventilation
air). If you make use of heat pump for cooling room, the payback of your investment will be even fa Because the
cooling is totally for free since it is merely a byproduct from heat pump normal work.
ster, thus within 2-3 years.
0
500
1000
1500
2000
2500
3000
3500
PCWU 300SK-
2.3kW
gaz ziemny olej opałowy elektryczne
Annual cost calculated on:
(300l hot water/day)
0
500
1000
1500
2000
2500
PCWU 200K-
2.3kW
gaz ziemny olej opałowy elektryczne
Annual cost calculated on:
(200l hot water/day)
5
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

3. Heat pump structure
The compressor’s function in a heat pump system:
1) Increase the temperature and pressure of refrigerant for effective heat condensing to the heating side.
2) The efficiency of compressor significantly affect the total efficiency of heat pump system. Because 90%
of total input electrical energy is consumed by compressor.
PCWU 200 and PCWU 300 series, we use high efficiency compressor from HIGHLY (a
Hitachi product). Power : 0.6KW. Compressor type: rotary.
In heat pumps from
Condensor
Heat exchanger in our heat pump adopts an advanced solution - with coils tightly wrapped outside the
stainless steel tank. By enlarging the contact surface and using special lubricant to assist heat
transfer, a structure can achieve as
high as the traditional type which puts condensor inside tank (with direct contact with usage water). But
since our structure has no direct contact between condensor and water, it is less sensitive to electrical
faults and poor water quality. As a result, the effective lifetime of storage tank integrated with heat pump will
be extended significantly.
silicon
dditionally with the well-insulated polyurethane foam, such efficiency
Danfoss expansion valve
Heat pumps from PCWU 200K-2.3kW and PCWU 300SK-2.3kW series are equipped with thermal
expansion valve from Danfoss. The expansion valve in heat pump system is with respect to its function the
counterpart of the compressor. It controls the amount of liquefied refrigerant streaming under high
pressure towards the evaporator. The amount is limited in such a manner that only the amount of coolant
can reach the evaporator which can be evaporate completely. In this way it is assured to take as much heat
from the air as possible but also avoided reliably, that liquid coolant from the evaporator can enter the
compressor and destroy the device (i.e. so called “beat by a liquid“). Closing or opening the expansion valve
leads to pressure change thereby changes the evaporation temperature of refrigerant
. It can be illustrated to the situation
that when you boil water on the top of Mount Everest (low atmospheric pressure), the water will begin to boil
at . But if you use a pressure-cooker (which creat higher pressure on the water surface), the water
boiling point will be increased to about Commonly speaking, if the compressor is the heart of heat
pump, then the expansion valve can be seen as the brain.
when it enters
evaporator (the lower pressure the lower evaporation point, vice versa)
68°C
110°C.
Evaporator
During flowing trough the evaporator coils, refrigerant takes heat from air and accomplishes phase change
(from liquid to gas). The heat will be released later through condensor to heat up water.
Due to the low heat capacity of air, we must use fan to force more air flow through the evaporator. The
structure of our evaporator is similar as in the car cooler. The copper tube hydrophilic aluminum fin
evaporator coil effectively extends the contact area with the air flow and increases heat exchange
efficiency. Please be aware of that a dirty evaporator covered with dust, oil greese or leaves will harm the
heat exchanging rate.
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Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

4. Controller instruction
4.1 Driver map
MENU
Login [default 0000]
Parameter settings
Heat pump par.
Switch on heat pump [YES/NO, default YES]
Tap water temperature heated by heat pump [10-55°C, default 50°C]
Min. temp. wsitching heat pump on (T1) [-5-10°C, default 5°C]
Extra equip. par.
Heater E
Switch on heater [YES/NO, default YES]
Temp. of water heated by heater when HP on [30-55°C, default 45°C]
Temp. of water heated by heater when HP off [30-60°C, default 55°C]
Block heater when heat pump switched on [YES/NO, default YES]
Block heater when boiler D switched on [YES/NO, default YES - visible in the diagram No. 4,7,9]
Circulation pump [visible in the diagram No. 2,3,4,6,7,8,9]
Min. temp. switching on circulation pump [20-60°C, default 35°C]
Circulation pump operation mode [INTERR/CONT., default INTERR]
Solid fuel boiler B [visible in the diagram No. 3,8,9 ]
Max. temp. switching off boiler pomp [10-85°C, default 65°C]
Min. temp. switching on boiler pump [30-60°C, default 45°C]
Difference in temp. switch boiler pump on [5-15°C, default 8°C]
Solid fuel boiler priority [YES/NO, default YES]
Gas boiler D [visible in the diagram No. 4,7,9]
Max. temp. switching off boiler [10-85°C, default 65°C]
Block boiler when heat pump switched on [YES/NO, default YES]
Time program
visible in the diagram No.
visible in the diagram No.
Switch on function of antilegionella [YES/NO, default YES]
Realize protection via heater E YES/NO, default YES
Realize protection via gas boiler D YES/NO, default YES - visible in the diagram No.
Passwords
User
Controller settings
Date and time
Display
Backlight brightness [1-10, default 10]
Backlight timeout [1-10min.,default 10 min.]
Sounds
Key sound [YES/NO, default YES]
Dźwięk alarmów [YES/NO, default YES]
Port RS485
Transmission speed [default 115200]
Physical address [default 255]
Logical addres [default 65535]
Language
Polski
English
Deutsch
Manual control [only for servis]
Measured parameters
Info
Program upggrading [only for producent]
Heat pump
Heater E
Circulation pump [ 2,3,4,6,7,8,9]
Gas boiler D [ 4,7,9]
Antilegionella
[ ]
[ 4,7,9]
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Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

4.2 To start the heat pump
By pressing the downward button, you can go to the subscreen with a internal structure diagram shown how heat pump works. To go back to
the main screen, you can press the upward button or just wait for a few seconds with no operating.
Before start to use our controller, please understand the function of each button:
Then you will see the main screen shown as following. You can read from it the following information:
Kalibracja klawiatury
Prosze nie dotykac
sensorow
01
T1
T2
T3
o
11.2 C
o
14.5 C
o
10.7 C
Wt 13-02-19 08:26
1
2
3
E
Run OK
Kalibracja klawiatury
Prosze nie dotykac
sensorow:
Keyboard calibration
Please do not touch
the sensors
Reading
parameters.
Please wait....
Press this button to enter the menu of controller. You will see the option list for settings and information, which can be changed or
viewed. Upward and downward buttons can change the cursor position to choose the option needed.
Acception button, used to confirm setting changes or to
enter the desired control operation.
Escape button, used to return to the previous menu
without saving setting changes.
Upward button, used to move to the upper position in the
option list or return to the main screen from the
subscreen of heat pump internal structure diagram.
Downward button, used to move to the lower position in
the option list or go to the subscreen of heat pump
internal structure diagram from main screen.
Info
Menu
Manual control
Measured parameters
01
T1
T2
T3
o
11.2 C
o
14.5 C
o
10.7 C
Wt 13-02-19 08:26
1
2
3
E
Run OK
Number of the selected shema of
installation
The flashing elements
indicates the corresponding
components are under operation.
The numbers represent
the locations of corresponding
temperature sensors
Date and time
Measured value of temp. sensors
Operation state or alarm
Addtional devices controlled by heat
pump controller (please refer to the
code letter)
T8
T10
High pressure switch
Condensor (heat exchanger)
Expansion valve
Evaporator (heat exchanger)
Compressor
Low pressure switch
8
Login
Menu
Paramter settings
Controller settings
01 Wt 13-02-19 14:24
13.2
o
62.1 C
oC
Run OK
After power supplied, it takes few seconds to initiate the controller. The following messages will be displayed on the screen. Please do not
touch any key at this time.
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

Attention:
It is fobbiden to disconnect heat pump from power supply when the tank is filled with water. Absence of power supply will
dismiss safety heat pump and tank.protections for
4.3 Parameter settings
The first option in the menu list is Login (as shown below left). Press OK button. To perform any other options in menu, you must
login first. The default password for users is 0000(Just press the OK button for 4 times). Your log in will be valid for 5 mintues
under no operation circumstance.
After the login accepted, you can enter into the parameter setting menu. Move the cursor via arrow buttons, you can see the
whole parameter setting option list.(as shown below).
Choose Heat pump par. (by OK and button) and you will see 3 parameters of heat pump. By pressing OK, the value with grey
background will flash. Use arrow buttons to change the value and press OK again to confirm the value you choose.
YES - Heat pump will work untill the water in tank is heated
to desired temperature. Heat pump operation can only be
blocked by alarms or priority of other heating source.
NO - Heat pump switches off.
You can change the value of targeted water temperature for
heat pump, range from 10 to 55°C.
Heat pump parameters
9
Press On/off button to switch on or switch off the device. Before switching off the device, a confirmation screen will be displayed.
Press OK button and the device will be switched off.
Kalibracja klawiatury
Prosze nie dotykac
sensorow:
Do you really want to
turn off controller?
OK-YES ESC-NO
PG-426-P01
version: 01d
Login
Menu
Parameter settings
Controller settings
Heat pump par.
Parameter settings
Extra equip. par.
Time program Passwords
Parameter settings:
Time program
Antilegionella
Tap water °C
temperature
heated by heat pump
Heat pump par.:
50
Switch on
heat pump
Heat pump par.:
YES
Enter password:
* * * *
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

You can set the required minimum inlet air temeprature for
heat pump operation (in case of that you are using outdoor
air as heating source).
Reference value of the combination with backup heating sources at difference air temperature boundary:
-5°C - electric heater (-5°C is the minimum allowed setting value for heat pump operation, though we do not recommend to
let heat pump work with air inlet temperature lower than
0°C - Oil-fired boiler
4°C - LPG
8°C - natural gas
In case of combination with solid fuel boiler, heat pump will not turn on if you set higher priority to boiler .
If heat pump use duct air from ventilation system as heating source, it may work all around the year depending on the air
temperature in ventilation pipes .
0°C, the wearing out of compressor will be faster due to poor working
condition)
Parameters of addtional devices
At the second place in parameter settings menu you can find Extra equipments parameters. Depending on what scheme you
choose for installation, the following screens will be displayed:
10
o
Min. temp. C
switching
heat pump on (T1)
Heat pump par.
5
Heater E
Extra equipment par.
Heater E
Extra equipment par.
Circulation pump
Heater E
Extra equipment par.
Circulation pump
Gas boiler D
Heater E
Extra equipment par.
Circulation pump
Solid fuel boiler B
Scheme : 1 and 5 Scheme : 2 and 6
Scheme : 3 and 8 Scheme: 4 and 7
Scheme : 9a Scheme: 9b
Heater E
Extra equipment par.
Circulation pump
Solid fuel boiler B Gas boiler D
Extra equipment par.
Circulation pump
Solid fuel boiler B
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

Parameters of electrical heater E
The first parameter is to enable or disable electrical heater (as shown below left). By pressing OK.,YES will start flashing. Use
arrow buttons to change YES to NO. Accept your change by pressing OK again. If you don’t want to save your change, cancel it
by ESC button (parameter value will go back to previous setting). When the cursor stops flashing, your setting is saved and you
can go to next parameter by arrow buttons.
The next is Temp. of water heated by heater when HP on (as shown below right). Electrical heater will heat the water together
with heat pump to this setting value, except priority is given to heat pump operation (please refer to parameter in the following:
Block heater when heat pump switched on). Important is that this value shall not exceed the target value for heat pump,
otherwise heat pump will have no chance to perform operation, because the electrical heater will take full responsibility for
maintaining desired water temperature. Electrical heater works with a fixed hysteresis 2°C (temperature drop of water, which
will activate heating operation). Such mode is generally called the PARTY mode - in case of more users than normal situation
need to use hot water, parallel operation with electrical heater or other heating device will satisfy the larger demand.
The third paramter is Temp. of water heated by heater when HP off (as shown left below). If the heat pump is blocked by
alarms( ie. threaten to system operation is detected, or air inlet temperature is too low), or heat pump is turned off manually
through controller, electrical heater will heat water to the temperature defined by this parameter. However, if you give higher
priority to gas boiler or solid fuel boiler, then electrical heater will not turn on even when heat pump is disabled (Boilers are
more economical to than electricity).
The fourth parameter is Block heater when heat pump switched on (as shown right below). If you set it as YES, electrical heater
will not switch on whenever heat pump is enabled.
The circulation pump works according to parameters. The first is the minimum temperature switching on circulation pump
(this temperature refers to T2 top tank temperature). It ranges from
The second one is Circulation pump operation mode. You can set INTERR or CONT. operation. At INTERR mode, the pump will
work for 5mins with every 10min interval. At CONT. mode, the pump will work all the time.
20 to 60°C. The factory setting is 35°C.
11
The last parameter is Block heater when boiler D switched
on (as shown right). If you are using a scheme intergrated
wall-hung boiler (automatic boiler). When heat pump is
disabled (by alarms or low air inlet temperature or
manually off), the boiler will be automatically turned on
and electrical heater will be blocked.
Parameters of circulation pump
Switch on
heater
Heater E:
YES
o
Temp. of water C
heated by
heater when HP on
Heater E:
45
o
Temp. of water C
heated by
heater when HP off
Heater E:
55 Block heater
when heat
pump switched on
Heater E:
YES
Block heater
when boiler D
switched on
Heater E:
YES
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

Parameters for solid fuel boiler B
If a solid fuel boiler is combined in system, you can set the Max. temp. switching off boiler pump (as shown below left).
Possible range lays in . This parameter prevents the tank from over heating and excessive
pressure.
The second parameter is Min. temp. switching on boiler pump (as shown below right). Here the setting temperature refers to
boiler outlet water temperature T4 (range 30-60°C, factory setting 45°C).
10-85°C (factory setting 65°C)
The next is Difference in temp. switch boiler pump on. Factory setting is . This
parameter refers to the temperature difference between T4 and T3 ( the temperature of boiler coil in the tank) or T4 and T2 (
only in scheme 8, when the boiler coil is mounted top in tank and operate upon top tank temperature).
The boiler pump starts only when all of the above three conditions are satisfied.
The last parameter is Solid fuel boiler priority (as shown below right). If you choose YES, then priority is given to solid fuel boiler
over all the other devices (including heat pump, electrical heater, automatic boiler). When the above conditions are met to turn
on solid fuel boiler, all the other devices will be turned off. This option is to achieve the highest heating efficiency with the
lowest cost.
8°C (possible range for setting is 5-15°C)
Parameters of gas boiler D:
The settings in this section apply to gas boiler or any other type automatic boiler. The first parameter is Max. temp. switching
off boiler, which is similar as in section Parameters of solid fuel boiler B. It falls into function whenever heat pump is blocked by
alarm or disabled manually. In case of parallel operation of gas boiler together with heat pump (the next parameter Block
boiler when heat pump switched on is set as NO), gas boiler will work till the water is heated to this value, which equal to Tap
water temperature heated by heat pump minus hysteresis temp. switch heat pump on. For example, if the Tap water
temperature heated by heat pump is set as 50°C, and the hysteresis temp. switch heat pump on is 5°C, then the desired water
temperature for gas boiler heating is 45°C. When water temperature in the tank falles to below 45°C, heat pump and gas
boiler will be activated for heating, gas boiler will work to 45°C, and heat pump will continue heating till water is heated to
50°C. It is another possibility to realize PARTY mode - when there is larger demand for hot water, gas boiler will be enabled as
parallel heating source.
12
o
Max. temp. C
switched off
boiler pump
Solid fuel boiler B:
65 o
Min. temp. C
switching on
boiler pump
Solid fuel boiler B:
45
o
Difference in C
temp. switch
boiler pump on
Solid fuel boiler B:
8Solid fuel
boiler
priority
Solid fuel boiler B:
TAK
o
Max. temp. C
switching off
boiler
Gas boiler D:
65 Block boiler
when heat
pump switched on
Gas boiler D:
TAK
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

Time program
Setting operation of time program for all devices are the same. When you enter time program setting screen, you can see 3
lines that symbolizing 3 situations: Mo-Fr (Monday to Friday), Sa (Saturday) and Su (Sunday). You can define the working time
at hourly interval in different days of week. To make change, firstly you need to move the arrows though arrow buttons to the
hour you want to change, and then press OK button to add or remove this hour from device operating period. White
overstriking means at this hour the corresponding device is enabled, otherwise it means device will be blocked.
Antilegionella
This option realizes control for anti-legionella function. More about legionella bacteria and prevention method can be found in
part 5. Antilegionella.
You can Switch on function of antilegionella by choosing YES.
The tank will be overheated at Sunday night, and last
maximumly to Monday morning 6:00. Antilegionella
operation will be accomplished earlier if the water is heated
to 70°C.
Depending on which scheme you are using, antilegionella operation can be realized by electrical heater E or gas boiler D or
both of them. (as shown below)
Attention:
If young children need to use hot water just after antilegionella operation, it is suggested to instal mix valve to avoid burn from
over heated water.
Heat pump off from 0:00 to 1:00.
By pressing OK button, overstriking will be
added, then heat pump will work at this
hour.
Passwords
The user can change passwords to prevent wrong settings, for example, by small children.
Firstly, please press the OK button, enter your new password
and confirm it by entering new password again. After pressing
OK again, a confirmation message will be displayed on
screen.
If you forget your password, resetting can be made by installer
or HEWALEX service. However, such service may require
payment.
13
Heat pump:
Mo-Fr
Sa
Su
00-01
0 6 12 18 24
Switch on
function of
antilegionella
Antilegionella:
YES
Realize
protection
via heater E
Antilegionella:
YES
Realize
protection
via heater E
Antilegionella:
YES
User
Passwords
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

4.4 Controller settings
The users have possibility to change settings of controller, like date and time, display and sounds.
Date and time
Move the pulsing cursor to the value you want to change,
increase or decrease value by arrow buttons and confirm it by
pressing OK.
Display
The user can increase or decrease brightness by change value of Backlight brightness (range 1 to 10, 10 the brightest). And
set in the time to turn off backlight under non-operation situation.Backlight timeout
Sounds
In this option, the user can turn on or off key sound and alarm sound by choosing YES or NO (as shown below).
Port RS485
It is used to retrieve data or control the device via an external controller. The values of Transmittion speed, Physical address
and logical address depend on the host request.
Languages
Our controller provides multi-language access(Polish, English and Deutsch).
14
Date and time
Controller settings
Display
Sounds Language
Controller settings
Sounds
Port RS485
Data i czas
Date and time:
YY.MM.DD
DT HH:MM
13-05-24
Fr 12:20
Backlight
brightness
Display:
10 Backlight min
timeout
Display:
10
Sounds:
YES
Sounds:
YES
Key sound Alarm sound
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

4.4 Measured parameters
The value of all measurable parameters can be read from
Measured parameters in main menu. Here you can check out
real values of all temperatures sensors in system and states of
protection swtich as well as external controller. During normal
operation, LP (low pressure) swtich, HP(high pressure) switch
and Ext. ctrl. (external controller) shall be closed. When LP or
HP is open, it indicates either pressure failure or switch failure.
4.5 Info
In Info, you can find out the software version information for both panel and executive module.
6. Equipment maintenance
For maintenence details please refer to section installation and service point 5: Maintenance. The users shall remember to
check the safety valve periodically according to guidance from valve producer, and clean the air inlet filter to heat pump.
As a result, The least expensive and most effective prevention method is perioticaly
heating up water to 70°C. In heat pumps which integrated with water storage tanks, like
PCWU 200 and 300 series, our controller provides Antilegionella function. In anti-
legionella operation, the tank water will be overheated every week between midlight of
Sunday to 6:00 Monday morning. The user can choose to use electrical heater or gas
boiler to heat water up to 70
If the water stored in tank has not been used for a few days (for example, after returning
from vacations), it is also recommended to overheat the water before usage .
°C (see more details in section 4.2 Parameter settings,
Antilegionella).
Attention:
.
If young children need to use hot water just after antilegionella operation, it is suggested
to instal mix valve to avoid burn from over heated water
Picture: http://www.cruiselawnews.com/tags/legionella/
5. Antilegionella
Legionella is common in aquatic systems. It acquired its name after a July, 1976 outbreak of a then-unknown "mystery
disease" sickened 221 persons, causing 34 deaths. Patients with Legionnaires' disease usually have fever, chills, and a
cough, which may be dry or may produce sputum. Legionellosis is an infectious disease declared by the Ministry of Health. In
case of inadequate treatment it can lead to death.
The most common sources of Legionella and Legionnaires' disease outbreaks include domestic
hot water systems. Research shows 32 to 42 °C (90 to 108 °F) is the ideal growth temperature range for Legionella bacteria.
At 60 °C (140 °F) ,90% die in 2 minutes. Above 70 (158 °F), Legionella dies almost instantly.
Most of the known cases are reported in the Mediterranean, but
occasionally also in Poland.
°C
15
T1
T2
T3
o
11.3 C
o
14.5 C
o
10.7 C
Measured parameters:
T8
T10
LP switch
o
13.7 C
o
62.2 C
Closed
Measured parameters:
HP switch
Ext. ctrl.
Closed
Closed
Measured parameters:
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

8. GSM service
By purchasing an GSM modelm and paying for annual service
(the actual cost please refer to our internet webpage
you will be able to extend the controlling of
device to mobile version. After login to your profile, you can
change controller settings, check the real working state of
device or view the statistics on performance. The unique
advantage of GSM service is 24-hour monitoring of device and
first time alarm information. GSM service requires access of
internet. More information can be found in our webpage at
or via contaction with HEWALEC heat pump
technical department.
Picture in the right: one of the screens you can see after login of user profile.
www.hewalex.eu),
hewalex.eu
7. Operating FAQ
Basing on our service experience, a number of most frequently asked questions relating to heat pump operation are listed
below:
1) Which is better? To operate heat pump at night when the tariff is lower or operate in the day with warmer air inlet? Normally
there is no significant difference in the case of cost. Because the lower electricity price in the night is also accossiated with
lower air inlet temperature, which will decrease heat pump efficiency. However, if you are using duct air from ventilation
system for heat pump, operation in the night could be cheaper.
2) Whether it is possible to make use of outlet air from heat pump for room cooling? Yes, it is possible. Only that, if the distance
to the room is long, an additional fan shall be installed to assist air flow. The pipes shall meet ventilation requirments and at
lest once per year, antibacterial operation shall be implemented to the evaporator.
3) What is condensate? Condensate here refers to the water which has been removed from cooled air passing through the
evaporator. It is normal as heat is retrieved from air. And it is most desirable effect since the phase change of water releases a
large amount of heat to the refrigerant in evaporator. So, the COP of heat pump does not only rely on air temperature but also
humidity.
4) Whether heat pump PCWU 200 or PCWU 300 can be connected to ventilation system (for example, operate with duct air
from ventilation)? Yes, because of low air flow volume (nominal value
5) Is it allowed to unplug the heat pump from power supply during winter or when I leave for vacation? It is not recommended in
order to protect the tank from corrosion with active titanium anode, which relies on main power supply (but its power
consumption is very low). In such circumstance, the user may turn off heat pump by controller but please keep main power
cable plugged.
6) Why still equip magnesium anode in the tank? Do I need to replace it periodically? We use both magnesium anode and
titanium electrical anode to provide full protection of tank for our customer. Even in case of main power supply or titanium
anode failure, the tank is still under protection. The magnesium anode shall be checked every 2 years, but since titanium
anode is applied, the magnesium anode shall be able to be functional for at least 5 years without replacement.
7) How long it takes to heat up water in 200L and 300L version (water from 15 to 45°C, air inlet 20°C)? If you are talking about
heating water by heat pump ( only, then 200L water takes about 3 hrs, and 300L water takes about
4.5hrs.
250-350 m³/h), ventilation air is enough to meet heat
pump demand. Moreover, since the duct air is warmer than outdoor, heat pump will be able to work all around the year with an
average COP close to 4.
2,3kW heating capacity)
16
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

Installation service instruction (for installers)
1. Storage and transportation
During storage, heat pump shall be protected with carton box as the factory package and prevent from water or flood.
Storage temperature shall be within -10 do 45°C. Temporarily leaning heat pump to max 45
foil and
° is acceptable, but in such case
the heat pump must stand still for at least 1hr before operation. It is safer to transport the heat pump in vertical postion with
max. 30° bias.
2. Installation location selection
During transportation or lifting, heat pump must be placed on
the pallet. In case of manual handling, it is suggested to put
the heat pump on a pallet and fasten with straps to ensure
more stable movement. Please be ware of that, dent could
happen as consequence of improper handling, especially on
the upper part of the unit. 60°
The device is designed for installation in heated rooms.
Air inlet temperature shall be within range 0-40°C. Higher or lower temperature will be result
in faster wear out of the device.
Condensate water shall be removed by extended pipe or tube to the drain. A siphon can
avoid unpleasant scents. Condensate drain is gravity flow, please make sure the
application level is to discharge condensate smoothly.
In case of vertical air pipe installation, a minimum ceiling height (1800mm for 200L version,
1920mm for 300L version) shall be assured. And the pipes shall be easily removed (for
example, can be lift up at least 100mm).
In case of horizontal air ventilation, it is necessary to use 90° elbow pipe with 150mm inner
diameter. The minimum ceiling height is 200mm for 200L version and 2100mm for 300L
version. And the pipes shall be easily removed (for example, can be lift up at least 100mm).
If you install the device in a room without closed air pipelines, the minimum volume of this
room shall be at least 30m³ and good ventilation is required. Such installation has generally
lower efficiency of heat pump operation due to the mixing of inlet and outlet air.
T>0°C
T air inlet
0-40°C
Condensate
Level
17
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

The foundation of heat pump must be able to support the whole device even when the tank is
filled with water.
For 200L version, it will be 290 kg, and for 300L version, 402kg.
It is forbidden to install the device where flammable gas is stored or the inlet air could contain
such substance. Violation of this request could cause fire.
Heat pump cannot use air from or installed at a place, where contains poisoning or corrosive
substances. This rule also applies to the air from chlorination swimming pools. High
concentration of chlorine can cause perforation of heat pump evaporator.
If the air used by heat pump is high in fat or greasy substances (for example, air from
industrial kitchens), before air flows in, carbon filter shall be implemented to prevent
efficiency deduction caused by fat accumulating on evaporator.
For similar reason, the inlet air shall be clean from high concentration of dusts as well.
290/
402 kg
GAS
Tłuszcze
Pyły
Heat pumps from PCWU 200 and PCWU 300 series provide possibility of connection to mechanical ventilation system.
If the air outflow from central ventilation system is between 250-350m³/h, then it is enough for heat pump. Addtionally,
cool down the air into the house for 5 to 10
in
summer days heat pump can °C comparing to outdoor temperature. It is without
any additional cost. The cooling capacity generally depends on air flow rate - for example 250m³/h can provide longer cooling
time so that higher cooling capacity than 350m³/h.
Connection to mechanical ventilation system
Winter mode - Heat pump works with a pre-cooled air ducting from indoor. But it is still warmer than outdoor air. From heat
recovery point of view, it is attractive heat source for heat pump. After heat pump, air will be exhausted outside the building.
Summer mode -Heat pump intakes air from outdoor and release cooled air to indoor. In this mode, the air for heat pump is
from outdoor. Due to hygiene concerns, we cannot operate heat pump with closed air circult ( it means intake and exhaust air
both from indoor).
18
flap
Bypass damper
(Tee pipe)
Switched to outdoor exhaust
Exhaust air
to outdoor
Exhaust air from the room
Outdoor air
flap
Supply air to the room
Exhaust air
to outdoor
Exhaust air from the room
Outdoor air
Bypass damper
(Tee pipe)
Switched to cooling room
Winter mode Summer mode
Supply air to the room
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

By connecting heat pump to central ventilation system, the user can make use of output control from heat pump controller.
Raley RL01 can provide 230V output to run the central ventilation.
Through controller, the user can set working time of heat pump and
ventilation. The ventilation time shall cover heat pump operation period,
this is to assure enough air flow supplied to heat pump. In case of heat
pump operates when ventilation fan is off, high resistance in pipelines
could cause over low air flow to heat pump. In the worst case, it can trigger
low pressure alarm of heat pump.
3. Installation
3.1 Connecting heat pump with other devices
apply to model PCWU 200K-2.3kW and PCWU 300SK-2.3kW
scheme 1
Symbols:
mixing valve ie.ESBE VTA322 (3/4") [NO. in katalog. HEWALEX 70.70.00]
safety valve max. 7 bar included in factory configuration AKE WYA-20 3/4"
expansive vessel min. 12L ie. ELBI D18 [NO. on katalog. A202L24]
one way valve
Depending on the scheme and heat pump model, there are various possibilities to connect other devices to heat pump. In the
controller, external devices are defined as following:
B - solid fuel boiler (ie, coal boiler, fireplace with water jacket)
C- circulation pump
D - automatic boiler (ie. gas, oil fired or electrical boiler)
E - Electrical heater 1.5kW equipped in the tank (factory configuration)
F - pump for solid fuel boiler
SOL - solar collectors
Connecting external devices to heat pump automation
After removing the aluminum front panel and the black cover, you will see the electric carbinet of heat pump,where you can
find a terminal block reserved for external devices (more details in section 5.2 Installation and service instruction).
In the following, various schemes are described.
111 12 13
2345678 9 10
t
5K
t
5K
AT BT
OUT C IN external controller
R1
R2
Position in terminal block:
Sensor T1 AT (ambient temperature) is connected to
terminal number 5 and 6. It shall be mounted at the place
where can detect real inlet air temperature for heat pump.
For example, on the outside wall when air is taken from
outdoor, or inside the ventilation pipe when duct air is used.
OUT F
hot water output
condensate discharge
ɸ21mmflexible hose inner
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
electrical heater 1.5kW
factory configuration
cold water input
air
T1
siphon before sewer
connected to safety valve
ambient temperature sensor
The diameter of all connections to the tank are
(PCWU 200K-
2.3kW model is with one coil inside for boiler, and w PCWU
300SK-2,3kW with 2 coils inside for boiler and solar collector.
The insulation adapter (as shown right) shall be used to avoid
direct connection between tank and metallic pipes.
¾’’. Each coil
inside the tank provides 1m² heat exchange area
19
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW

scheme 3
( )difference to scheme 2 is solid fuel boiler application
apply to model PCWU 200K-2.3kW and PCWU 300SK-2.3kW
scheme 2
(difference to scheme 1 is circulation pump application)
apply to model PCWU 200K-2.3kW and PCWU 300SK-2.3kW
Symbols:
water pump or circulation pump
111 12 13
2345678 9 10
t
5K
t
5K
AT BT OUT D
IN external controller
R1
R2
Position in terminal block:
Circulation pump can be connected to terminal 1 and 2.
Then the pump will be controlled by controller (relay RL02).
Circulation pump with power more than 100W shall be
drived by additional contactor.
111 12 13
2345678 9 10
t
5K
t
5K
AT BT OUT D
IN external controller
R1
R2
Position in terminal block:
Boiler pump can be connected to terminal 3 and 4.
.
Temperature sensor T4(the boiler temperature BT) can be
connected to terminal 7 and 8. Sensor should be mounted
to place where it can indicate real output temperature
from boiler.
Then
the pump will be controlled by controller (relay RL09)
Boiler pump with power more than 100W shall be drived
by additional contactor.
scheme 4
(difference to scheme 2 is automatic boiler application)
apply to model PCWU 200K-2.3kW and PCWU 300SK-2.3kW
Controlling of automatic boiler can be realized in 2 ways:
1. Use terminal 9 and 11 to turn on/off boiler by closing or
opening one corresponding connection inside boiler.
2. Turn on/off bolier by giving corresponding temperature
values simulated by resistors R1 and R2. Reference values
of resistors are listed in next page. Attention! In such
application, the original temperature sensor from boiler
must be disabled.
hot water output
condensate discharge
flexiable hose inner ɸ21mm
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
electrical heater 1.5 kW
factory configuration
cold water input
air
T1
siphon before sewer
connected to safety valve
ambient temperature sensor
water circulation
hot water output
condensate discharge
flexible hose inner ɸ21mm
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
electrical heater 1.5kW
factory configuration
cold water input
air
T1
siphon before sewer
connected to safety valve
ambient temperature sensor
water circulation
automatic boiler D
(ie. gas, oil fired or electrical boiler)
solid fuel boiler B
boiler pump F
T4
hot water output
condensate discharge
flexible hose inner ɸ21mm
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
connector 3/4"
in case of using metallic pipes,
isulation adapter shall be applied
(ie. adapter PA66 GF30)
electrical heater 1.5kW
factory configuration
cold water input
air
T1
siphon before sewer
connected to safety valve
ambient temperature sensor
water circulation
boiler temperature sensor
111 12 13
2345678 9 10
t
5K
t
5K
AT BT
OUT C IN external controller
R1
R2
Position in terminal block:
OUT F
OUT C OUT F
20
Instruction manual
Heat pump water heater PCWU 200K-2.3kW/PCWU 300SK-2.3kW