Kronoterm WPG-07-1 HT Reference manual

Manual for Installation, Use and
Maintenance
For heat pumps earth-water and water-water
WPG-07-1 HT, WPG-10-1 HT
WPG-15-1 HT, WPG-18-1 HT
WPG-21-1 HT
The manual has to be handed over to the end user after installation.
ENG
Id.: 17-16-32-3048-01 | 7.2017

Manual for Installation, Use and Maintenance of the earth-water and water-water heat pump
WPG-07-1 HT, WPG-10-1 HT, WPG-15-1 HT, WPG-18-1 HT, WPG-21-1 HT
Id: 17-16-32-3048-00 | 7.2017
Printed in Slovenia, copyright: Kronoterm d.o.o.
This document is copyrighted. Any use outside the provisions of the copyright law without the
permission of Kronoterm d.o.o. is illegal and punishable by law. All previous versions of this document
are void. We reserve the right to make changes and mistakes in print.

1. Important information 5
1.1 Symbols 5
1.2 General 6
1.3 Safety warnings and instructions 6
1.4 Obligations of the manufacturer 9
1.5 Obligations of the installer during installation 9
1.6 Obligations of the authorised contractor for commissioning at first commission. 9
1.7 Obligations of the user 9
1.8 Factory testing 10
2. Transport and installation of the device 11
2.1 Transport 11
2.2 Installation of the device 11
2.3 Storing and warehousing of the device 11
2.4 Delivery package 11
2.5 Package and worn-out device management 12
3. Installation of the device 13
3.1 General 13
Minimal clearance from the device 15
Levelling of the device 15
Removal of the lid. 16
Set up and connection of the external sensor. 17
3.2 Heating system of machine installations 17
The scheme of the heating system 18
Preparing the heating hydraulic system - secondary 20
Charging of the heating system 22
Heat source - primary 24
Underground water - primary 24
3.3 Electrical connection 25
Description of elements in the electrical cabinet 26
Schematic display of the control system - TT3000 27
Connection of the internal control unit – TT3000 28
Electrical connection of the power cable 30
3.4 Basic input-output module MD1 - WPG 33
Connection of the elements to the internal control unit TT3000 34
Main circulation pump connection 36
Connecting heating cycle 2 (direct cycle - optional) 37
Connection of heating cycle 2 (optional) 37
DHW connection (optional) 40
Connection of the device’s remote on/off (optional) 41
External switch of heating/cooling (optional) 41
Connecting the cooling valve (optional) 42
Connecting the relay of the additional source DOVOG- gas/oil DHW (optional) 42
3.5 Connection of the room temperature corrector KT-1 and KT-2 43
4. Commissioning of the device 44
5. Maintenance 44

5.1 Cleaning the water filter 44
5.2 Monitoring the pressure in the heating system 44
5.3 Cleaning of the heat conductors 45
Cleaning of the heating system (water side) 45
5.4 Operation malfunctions 45
6. Technical data 46
6.1 Dimensions of the device 46
6.2 Technical data 47
6.3 Operating envelope 52
Heating mode 52
Cooling mode 52
6.4 Noise 53
6.5 Legend of data label 55

1. Important information
The manual describes the process of installation and maintenance of the device. The installation and
maintenance can only be performed by qualified personnel. Read the manual carefully before the
installation, this way you will be informed about the intended use, functionality and process of handling
the device.
The manual has to be handed over to the end user after installation.
In case the product shall be given to a third person for use, the manual has to be handed over
to them as well.
Definitions
An informed person is a person who reads this manual.
A qualified person has a certificate of expert qualifications.
An authorised commission contractor is trained by the manufacturer and authorised to perform
commission.
The authorised technician is trained and authorised by the manufacturer to perform
maintenance and servicing of the device.
The user uses the device according to its use.
The installer is a person professionally trained for performing hardware and/or electro-
installation work and mounting of the device.
Incorrect use of the device can lead to damage of the device, property or injury to the user. To reduce
risk the manual points out important information with the use of symbols.
1.1 Symbols
These symbols mark various risks for the user or the device.
DANGER:
Risk of situations which can lead to serious physical injuries.
WARNING: Risk of situations which can lead to minor physical injuries.
CAUTION: Risk of situations which can lead to damage or malfunction of
the device.
This symbol marks information for the user.
NOTE:
A notice which holds important information regarding requirements
of the manufacturer.

1.2 General
NOTE
Read the instructions for use and installation before installation.
NOTE
Any remaking or replacement of original components of the device eliminates
the manufacturer’s guarantee for safe and functional operation. In the case
of undesignated and incorrect use of the device the manufacturer is not
responsible for the consequences and will not acknowledge claims for
damages in these cases. The user is solely responsible for injuries and
damages on the device itself or on other objects resulting from undesignated
and incorrect use of the device.
NOTE
The installation of the device has to be performed in accordance with the
manual; otherwise the manufacturer does not acknowledge the warranty.
NOTE
The device is designed for yearly use of 2000 hours. Choosing an inadequate
power of the device can lead to yearly operation of above 2000 hours which
will reduce the lifespan of the device.
NOTE
Devices with the rated current higher than 16 A are in accordance with IEC
61000-3-12.
NOTE
After connecting the device it is necessary to acquire the guarantee or consult
the operator of the distribution network that the impedance of the network is
lower than prescribed for the individual type of device in the technical data.
This way the device will operate within acceptable limits of disruptions.
Otherwise it is necessary to connect the device to the network using a soft
start device.
DANGER
Failure to comply with the manual and good practise while connecting the
device to the power supply can lead to serious injury or death.
WARNING
Connecting the device to the power source can only be performed by a
qualified installer.
1.3 Safety warnings and instructions
DANGER
It is prohibited to move, shift, clean or service the device while in operation.
WARNING
It is prohibited to play with the device. Children are not allowed to clean the
device without supervision.

WARNING
The device can be operated independently only by informed persons who are
familiar with the safe operation of the device and understand possible hazards
of its operation. Children older than 8 and people with reduced physical and
mental capacities and with lack of experience and knowledge can only
operate the device under the supervision of an informed person.
WARNING
Before installation and any further adjustments to the device it is necessary to
consider the manual for safe use and maintenance.
WARNING
Installation has to be performed in accordance with national regulations on
electrical installations and with the instructions of the manufacturer. It has to
be performed by a professionally trained person.
CAUTION
The servicing and maintenance of the device can only be performed by a
person authorised by the manufacturer. In case of a malfunction, first contact
the installer who installed the device.
WARNING
It has to be made sure that the device does not endanger anybody. Access
to the device has to be denied to children and persons who are not informed
about the operation of the device.
WARNING
The device must never be cleaned with cleaning agents containing sand,
soda, acid or chlorides because these might damage the surface of the
device.
WARNING
The device contains fluorinated greenhouse gas. This is why tampering with
the device is only allowed to persons authorised for working with the
refrigerant as defined by the national legislation in force. While performing
works on the device, it is necessary to prevent the refrigerant to leak into the
atmosphere.
WARNING
It is necessary to consider all technical data and instructions in this manual as
well as all warnings and notes during planning, design, installation and use of
the device.
WARNING
Electrical installations have to be inspected in accordance with regulations on
the requirements for low voltage electrical installations in buildings by the
installer of electrical installations.

DANGER
Connecting the devices power cable can be performed by a qualified
electrician. During the procedure the device must not be live.
WARNING
In case the power cable of the device is damaged it has to be immediately
replaced. The replacement can only be performed by the manufacturer and
authorised maintenance worker.
WARNING
Before opening the device disconnect all electrical circuits and make sure the
device is not live.
CAUTION
Putting any kinds of items on or next to the device is prohibited.
CAUTION
In case the device is placed on the ground which is more subject to the
transfer of vibrations than a classical concrete panel with a screed, it is
necessary to underlay the device with a suitably thick and quality anti-vibration
underlay.
CAUTION
The device must not be placed in a room where it cannot be removed. Later
walling or setting up of other obstacles next to the device is forbidden.
CAUTION
In three-phase versions of the device, it is necessary to ensure the correct
arrangement of phases when connecting it to the power supply.
CAUTION
For the correct operation of the device, the electrical distributor has to provide
electricity of adequate quality (SIST EN 50160). In normal conditions this is
within ± 10 % of the rated voltage The data about the state of the electrical
grid have to be acquired from the electrical distributor.
CAUTION
Operation of the device with a frequency converter is forbidden.
CAUTION
Connecting the device to the electrical network has to be performed in
accordance with the standards for connecting devices to the electrical
network. Connect the device to the electrical network via the power supply
cut-off which is installed into the electrical installation under the regulations in
force.

1.4 Obligations of the manufacturer
The manufacturer guarantees that the device is in accordance with current European directives and
standards. The device is marked with the mark CE and it has all the necessary documentation.
We reserve the right to make changes to the manual without prior notice.
As manufacturer we do not take responsibility for the consequences arising from:
Non-compliance with the manual for the device.
Incorrect and/or inadequate maintenance of the device.
Non-compliance with the manual for the installation of the device.
1.5 Obligations of the installer during installation
The installer is responsible for installing the device in accordance with the following requirements:
To thoroughly study the instructions for use and installation accompanying the device before
installation.
To install the device in accordance with the instructions and national legislation, policies and
standards in force.
1.6 Obligations of the authorised contractor for commissioning at
first commission.
CAUTION
The first commission can only be performed by the contractor of commissions appointed by
the manufacturer in accordance with the instructions for commission.
The contractor for commissions is responsible for commissioning the device in accordance with the
following requirements:
Performs the first commission and with the installer of others section of heating system
eliminates all eventual irregularities found at the commission.
To train the user for operating the device and settings.
Alerts the user to regularly maintain the device for keeping the device functioning properly
throughout its entire lifespan.
Gives the user all the documentation accompanying the device.
1.7 Obligations of the user
For ensuring unobstructed and effective operation of the device the user has to follow the following
instructions:
To thoroughly study the instructions for use and installation accompanying the device before
use.
To have a qualified and authorised installer perform the installation of the device.
To have a contractor for commissions perform the commission.
Allow the authorised contractor for commissioning or ask him to thoroughly explain the
functioning and how to operate the device.
Ensure regular yearly inspections and maintenance of the device by the authorised
maintenance worker.
Store this manual in an appropriate dry place close to the device.

1.8 Factory testing
For ensuring the high quality standard every device is tested in production for the following:
Tightness of the cooling cycle,
Water-tightness
Electrical safety and
Functionality.

2. Transport and installation of the device
2.1 Transport
CAUTION
The device must be transported with transport devices.
Secure the device during transport to prevent damage.
Transport the device in vertical position.
It is prohibited to tilt the device above 45°. Otherwise, damage to the cooling system
may occur.
2.2 Installation of the device
2.3 Storing and warehousing of the device
The device has to be stored in a dry and clean place. The allowed storing temperature is between 10 °C
and 45 °C, for a short period (up to 24h) also up to 50 °C.
2.4 Delivery package
The heat pump (device) for internal installation (internal unit).
Installation instructions.
Instructions for use.
Temperature sensor for external air temperature PT1000.
Temperature sensor for DHW.
Temperature sensor of mixing-heating cycle 2.
CAUTION
Appropriate transport equipment must be used for installing the device. Safety regulations
and good practise have to be followed.
STANDARD
LABEL

2.5 Package and worn-out device management
Sort the package according to cardboard, wood and foil and dispose of it in appropriate
containers.
After the lifespan of the device ends it has to be disposed of in accordance with the legislation
on waste electrical and electronic devices in force.
Refrigerant
The device holds the fluorinated greenhouse gas. You have to prevent leakage of the gas into the
atmosphere. During a maintenance procedure or removal of the device it has to be made sure that the
gas is removed in accordance with the current regulations on the use of substances harmful to the
ozone and fluorinated greenhouse gasses.

3. Installation of the device
3.1 General
Install the device in the utility room. The pipes connecting the device to the heating system are located
on the upper side of the device.
INSTALLATION of the device in case of using the heat of ground water
A
B
A
B
P1
P2
P3
P4
P5
P6
P7
P8 P10
P10
P11 P11
P15
P14 P13
P11
P9
C D
A Supply pipe for heating
(heating) C Supply pipe for heating - heat source
B Return pipe for heating
(heating) D Return pipe for heating - heat source
P1 Device with regulation P9 Temperature sensor for external temperature
P2 Heat exchanger P8 An adequate protection hose separate for power /
communication
P3 Electrical cabinet P9 Heat insulation with appropriate screen (for example
ALU harness)
P4 Water filter P10
Suitable protective pipe
P5 Power cable - internal device P11
Pipe heat insulation
P6 Power cable - submersible
pump P13
Primary water connection
P7 Power cable - circulation pump P14
Secondary water connection
P8 Sensor communication cable P15
Magnetic separator of impurities

INSTALLATION in case of using ground heat
P9
P7
P9
A
B
A
B
P2
P6
P4
P5
P3
P1
P8
P11
C D
A Supply pipe for heating
(heating) C Supply pipe for heating - heat source
B Return pipe for heating
(heating) D Return pipe for heating - heat source
P1 Device with regulation P6 Sensor communication cable
P2 Magnetic separator of
impurities P7 Temperature sensor for external temperature
P3 Electrical cabinet P8 Suitable protective pipe
P4 Power cable - internal device P9 Pipe heat insulation
P5 Power cable - circulation
pump P11 Water connection

Minimal clearance from the device
Minimal clearances of the internal device from walls for seamless operation, maintenance and servicing.
min.400 mmmin.400 mm
min.1000 mm
Levelling of the device
The internal device must be levelled in the horizontal position as shown on the diagrams below:

Removal of the lid.
The main switch of the device must be in the “OFF” position.
Unscrew the screws marked with 1 on the left and right side of the device.
Open the upper part of the lid (2) towards you.
1
2

Set up and connection of the external sensor.
For controlling the heating according to the external temperature, it is necessary to install the external
temperature sensor.
CAUTION
The sensor must be set up in a shady spot.
The sensor must not be set up above a window or door. It must be located away
from heat sources.
For measuring external temperature, the sensor type PT 1000 is used.
The direction of connecting
cables.
Temperature sensor for external
temperature.
CAUTION
The external sensor must be connected and watertight to prevent water penetration.
3.2 Heating system of machine installations
WARNING
The dimensioning of circulation pumps, valves, safety elements and pipes has to be
performed by the designing engineer according to the heating/cooling capacity of the device.

The scheme of the heating system
Below you can see an example of the basic hydraulic and control scheme of the heating system. For
other circuits see The Catalogue of Hydraulic Circuit Diagram.
MD1 MD2
M
M
M
The elements on the scheme are marked in the following
manner:
Legend of read
ing:
GOC
Mark of the element
MD1:Q3
Mark of the connecting clip on the
input/output module - MD
Mark of the input/output module

ELEMENTS
CONNECTING
CLIPS
MARK
CHARACTERISTICS
COMB A…G
Connection to various types of heat pumps
A
The device’s supply pipe for heating
B
The device’s return pipe for heating
OK
Current oil DHW
SP
Backup source
TSV
Warm sanitary water
BO
Boiler for sanitary water
HSV
Cold sanitary water
OCSV
Circulating pump for DHW
GOC
Main circulation pump
PLC
Processing unit
KT-1 Room temperature corrector KT-1 (can be used in all
heating cycles)
KT-2 Room temperature corrector KT-2 (can be used in all
heating cycles)
TS
Connector on PLC
Q1-Q12 Digital outputs of regulation ~ 230 V (input/output module
MD1 and MD2)
A1
-
A8
Analogue input (input/output module MD1 and MD2)
D1
-
D9
Digital input (input/output module MD1 and MD2)
HYB
Switch to hybrid operation
KH
Krono-hybrid
MD1
Basic input/output module 1
T1
Thermostat of heating cycle 1
T2
Thermostat of heating cycle 2
OC1
Circulation pump of heating cycle 1
OC2
Circulation pump of heating cycle 2
MV2
Mixing valve of heating cycle 2
OGK
-
1
Heating cycle 1
OGK
-
2
Heating cycle 2
MD2
Expansion input/output module 2
T3
Thermostat of heating cycle 3
T4
Thermostat of heating cycle 4
OC3
Circulation pump of heating cycle 3
OC4
Circulation pump of heating cycle 4
MV3
Mixing valve of heating cycle 3
MV4
Mixing valve of heating cycle 4
OGK
-
3
Heating cycle 3
OGK
-
4
Heating cycle 4
PST
Pipe safety thermostat
MARK
CHARACTERISTICS
MARK
CHARACTERISTICS
Closing valve
Manometer
Circulation pump Temperature sensor
Closing valve with exhaust
Thermometer
Drain valve with plug
Consumer of heat / coolness
Cleaning piece
Automatic vent
Expansion tank
3-way switching valve with em drive
Safety valve
3-way mixing valve with em drive
Non-return valve
Supply pipe for heating
Pipe safety thermostat Return pipe for heating
CAUTION
The supply pipe of each heating cycle must be fitted with an abutment safety thermostat
connected sequentially with the circulation pump to safeguard against the inflow of a
medium of excessive temperature.

Preparing the heating hydraulic system - secondary
Prepare the system according to one of the recommended hydraulic schemes (Catalogue of Hydraulic
Wiring Diagrams) which is specified by the manufacturer of the device. This is the only way to ensure
reliable and effective operation of the device. After connecting the device to the heating system, it is
necessary to examine all circulating pumps and electric motor valves if they function correctly.
The device must be connected to the heating system via rubber compensator or flexible pipes. The
latter must not be under tension in final position, this would worsen the devices noise and vibration
protection. In extreme cases this can also lead to damage to the device.
Quality of heating water
Maximal allowed content of individual substances in the heating water and the influence of these on the
heat exchanger are presented in the table below. It is not allowed to use heating water which contains
any substance in concentrations which cause corrosion in the heating system (influence “-”). It is also
not allowed to use heating water which contains two or more substances in concentrations which could
cause corrosion in the heating system (influence “0”).
TYPE OF PRESENT
SUBSTANCE UNIT CONCENTRATION INFLUENCE TO THE HEAT CONDUCTOR
Organic sediment mg / L 0
Ammonia NH
3
mg / L
< 2
1 to 20
> 20
+
0
-
Chloride mg / L < 300
> 300
+
0
Allowed water hardness °dH 5 – 10
Electrical conductivity µS / cm
< 10
10 to 500
> 500
0
+
-
Iron (Fe) removed mg / L < 0.2
> 0.2
+
0
Free carbonic acid mg / L
< 5
5 to 20
> 20
+
0
-
Manganese (Mn) removed mg / L < 0.1
> 0.1
+
0
Nitrates (NO
3
) removed mg / L < 100
> 100
+
0
pH value mg / L
< 7.5
7.5 to 9
> 9
0
+
0
Oxygen mg / L < 2
> 2
+
0
Hydrogen sulphide (H
2
S) mg / L < 0.05
> 0.05
+
-
HCO
3
- / SO
42
- mg / L > 1
< 1
+
0
Hydrogen carbonate mg / L
< 70
70 to 300
> 300
0
+
0
Aluminium (Al) removed mg / L < 0.2
> 0.2
+
0
Sulphates mg / L
< 70
70 to 300
> 300
+
0
-
Sulphite (SO
3
) mg / L < 1 +
Chlorine (gas) (Cl
2
) mg / L
< 1
1 to 5
> 5
+
0
-
Table: Influence of various aggressive substances in the heating water on the stability of stainless
copper welded plate transmitters. (+ = no influence, 0= danger of corrosion, - = corrosion - use not
permitted).