Gebwell GEMINI 40, GEMINI 52, GEMINI 64 Installation, Operation And Maintenance Manual

Installation, Operation and

Maintenance Manual

GEMINI Heat Pump

WWW.GEBWELL.FI

2 Gebwell Gemini Installation, operation, and maintenance manual

Table of contents

1 WARRANTY............................................................................................................................................................................. 5

2 INSTALLATION RECORD .................................................................................................................................................... 7

3 HEAT PUMP OPERATING INSTRUCTIONS ..................................................................................................................... 8

3.1 General ....................................................................................................................................................................................... 8

3.2 Ground source heat energy ......................................................................................................................................................... 8

3.3 Ground source cooling ............................................................................................................................................................... 8

3.4 Heat pump’s operating principle ................................................................................................................................................ 8

3.5 Heating functions ....................................................................................................................................................................... 9

3.6 Tips for saving ............................................................................................................................................................................ 9

4 DELIVERY AND HANDLING ............................................................................................................................................ 10

4.1 Delivery contents ...................................................................................................................................................................... 10

4.2 Optional accessories ................................................................................................................................................................. 10

4.3 Storage...................................................................................................................................................................................... 1 0 

4.4 Transport .................................................................................................................................................................................. 10

4.5 Removal from package and transport to final installation location ........................................................................................... 10

4.6 Safety instructions .................................................................................................................................................................... 10

4.7 Heat pump’s location ................................................................................................................................................................ 11

4.8 Mounting and unmounting the upper compressor unit ............................................................................................................. 11

5 HEAT PUMP STRUCTURE ................................................................................................................................................. 12

5.1 GEMINI structure..................................................................................................................................................................... 12

5.2 Sensors ..................................................................................................................................................................................... 1 3 

5.3 Pumps ....................................................................................................................................................................................... 1 3 

5.4 Control valves .......................................................................................................................................................................... 13

5.5 Other controls ........................................................................................................................................................................... 13

6 DIMENSIONS AND PIPE CONNECTIONS ....................................................................................................................... 14

6.1 Heat pump connections ............................................................................................................................................................ 14

6.2 Pipe connections ....................................................................................................................................................................... 14

7 PIPE INSTALLATION .......................................................................................................................................................... 15

7.1 Collector ................................................................................................................................................................................... 1 5 

7.2 Charging circuit ........................................................................................................................................................................ 16

7.3 Connections of an additional heat source ................................................................................................................................. 18

7.4 Extraction air heat recovery ...................................................................................................................................................... 18

7.5 Connections for external fixed fuel burners ............................................................................................................................. 18

7.6 Connecting of domestic hot water system ................................................................................................................................ 18

8 ELECTRICAL CONNECTIONS .......................................................................................................................................... 20

8.1 General ..................................................................................................................................................................................... 2 0 

8.2 Power supply ............................................................................................................................................................................ 20

8.3 Compressor’s motor protection switches (F1 and F2) .............................................................................................................. 20

8.4 Phase sequence / soft starter ..................................................................................................................................................... 20

8.5 Connection of temperature sensors ........................................................................................................................................... 20

8.6 Connection of the domestic hot water charging package (HWExE) ......................................................................................... 21

8.7 Connection of domestic hot water mixing valve (HWEx) ........................................................................................................ 21

8.8 Control of electric heaters in the accumulator / sequence controlled additional heating .......................................................... 21

8.9 Change-over valve(s) ............................................................................................................................................................... 22

8.10 Heating circuits ........................................................................................................................................................................ 22

8.11 Domestic hot water’s circulation pump .................................................................................................................................... 23

8.12 Connection of external source pump ........................................................................................................................................ 23

8.13 Connection of room unit, QAA74 ............................................................................................................................................ 23

8.14 Room sensor (acceossory) QAA55. ......................................................................................................................................... 23

8.15 Alarm forwarding ..................................................................................................................................................................... 23

8.16 Call for heating 0-10V .............................................................................................................................................................. 23

8.17 External prevention of activation / release signal ..................................................................................................................... 23

8.18 Tariff control ............................................................................................................................................................................ 24

8.19 Installation of extension module ............................................................................................................................................... 24

8.20 Connection of a cascade connection ......................................................................................................................................... 24

8.21 Connection of additional heat source ....................................................................................................................................... 24

9 FILLING AND VENTING ..................................................................................................................................................... 25

9.1 Heating system ......................................................................................................................................................................... 25

9.2 Filling the collector, non-pressurised ....................................................................................................................................... 25

9.3 Pressure test of the collector ..................................................................................................................................................... 25

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9.4

 Venting of the collector’s horizontal piping ............................................................................................................................. 25

9.5 Cleaning the collector filter ...................................................................................................................................................... 26

10 ACTIVATING THE HEAT PUMP ...................................................................................................................................... 26

10.1 Before activation ...................................................................................................................................................................... 26

10.2 Activation ................................................................................................................................................................................. 26

10.3 Venting ..................................................................................................................................................................................... 2 7 

10.4 Venting the heat supply circuit ................................................................................................................................................. 28

10.5 Use without a collector and use during construction site ......................................................................................................... 28

10.6 Activation of a cascade system ................................................................................................................................................ 28

11 HEAT PUMP OPERATION .................................................................................................................................................. 29

11.1 User interface ........................................................................................................................................................................... 29

11.2 User terminal ............................................................................................................................................................................ 29

11.3 Display symbols ....................................................................................................................................................................... 29

11.4 User levels ................................................................................................................................................................................ 30

11.5 Heating settings ........................................................................................................................................................................ 30

11.6 Selecting heating mode ............................................................................................................................................................ 31

11.7 Domestic hot water settings ..................................................................................................................................................... 31

11.8 Heat pump’s Reset function ..................................................................................................................................................... 31

12 SITE-SPECIFIC DEFINITION ............................................................................................................................................ 32

12.1 Time and date ........................................................................................................................................................................... 32

12.2 Summer/winter switch connection ........................................................................................................................................... 32

12.3 Language selection ................................................................................................................................................................... 32

12.4 Time programs ......................................................................................................................................................................... 32

12.5 Heating area (Heating circuit) .................................................................................................................................................. 32

12.6 Domestic hot water .................................................................................................................................................................. 34

12.7 Domestic hot water circulation pump ....................................................................................................................................... 35

12.8 Cooling circuit .......................................................................................................................................................................... 35

12.9 Heat pump settings ................................................................................................................................................................... 37

12.10 Programming the reservoir’s resistors and output water’s electrical heaters ............................................................................ 38

12.11 Control of additional heat source ............................................................................................................................................. 39

12.12 Control of fixed fuel burner...................................................................................................................................................... 40

12.13 Call for heating (VAK control) ................................................................................................................................................ 40

12.14 ModBus communication .......................................................................................................................................................... 41

13 SYSTEM INFO ....................................................................................................................................................................... 41

13.1 Special situations ...................................................................................................................................................................... 41

13.2 Heat pump status ...................................................................................................................................................................... 41

13.3 Heating circuits’ status information ......................................................................................................................................... 42

13.4 Domestic hot water status information ..................................................................................................................................... 42

13.5 Measurements .......................................................................................................................................................................... 42

14 FAILURES .............................................................................................................................................................................. 44

14.1 Alerts ........................................................................................................................................................................................ 44

14.2 Troubleshooting ....................................................................................................................................................................... 44

14.3 Troubleshooting table ............................................................................................................................................................... 46

15 MAINTAINING AND SERVICING THE HEATPUMP .................................................................................................... 49

15.1 Maintenance notice .................................................................................................................................................................. 49

15.2 Inspections ............................................................................................................................................................................... 49

15.3 Nominal curves of sensors ....................................................................................................................................................... 49

15.4 Testing inputs and outputs ........................................................................................................................................................ 49

16 TECHNICAL SPECIFICATIONS ........................................................................................................................................ 51

17 CONNECTION POINTS, CONTROLLER 1: ..................................................................................................................... 53

17.1 Sensors ..................................................................................................................................................................................... 5 3 

17.2 Controls .................................................................................................................................................................................... 5 4 

18 SETPOINT EXAMPLES FOR HEAT PUMP ADJUSTMENTS IN DIFFERENT HEATING NETWORKS .............. 55

19 MAINTENANCE RECORD .................................................................................................................................................. 56

20 ENERGY LABELS................................................................................................................................................................. 57

LIITE 1: ELECTRICAL DIAGRAMS

LIITE 2: DECLARATION OF CONFORMITY

4 Gebwell Gemini Installation, operation, and maintenance manual

ALWAYS KEEP THE OPERATING MANUAL IN THE IMMEDIATE VICINITY OF THE DEVICE!

Carefully study the manual before installing, adjusting or maintaining the device. Observe the instructions provided. Request a technician
to fill out the Commissioning and Warranty Protocoll, which must be returned to the device manufacturer. The protocoll is a requirement
for maintaining the validity of the manufacturer’s warranty.

Fill out the information below. This information must be available if the device experiences any failures.

Model: Serial number:

HVAC company: Name:

Date: Tel.:

Electrician: Name:

Date: Tel.:

v1-6 29082018 5

1 WARRANTY

Gebwell Ltd.

Patruunapolku 5, 79100 LEPPÄVIRTA, tel [phone], [e-mail]

issues the product,

GEMINI heat pump

a warranty regarding manufacturing and material faults, with the following contents.

Warranty period and start date

A two- (2) year warranty will be issued to this product, counting
from the product delivery date.

Two copies of the commissioning and warranty protocol will be
delivered with the heat pump. The installer / reseller of the heat
pump fills the said protocol in and goes over it with the customer.
Both Parties confirm they have gone over the protocol, and ac­cept the terms of warranty with their signature. The customer’s
copy of the warranty protocol must be stored, and presented on
request. The other copy must be delivered to the factory within
1 month from the product commissioning date. The warranty is
not valid in case the commissioning and warranty protocol has
not been filled in correctly, or if the factory copy has not been
returned to the factory.

Warranty contents

The warranty extends to all manufacturing and raw material
faults that have occurred in this product during the warranty pe­riod, as well as the direct expenses related to the changing of
these devices.

The buyer is responsible for any device malfunctions caused by
the storage conditions between the delivery and commissioning
date (cf. installation, operating and maintenance manual;
storage).

5-year component warranty

In addition to the normal product warranty, a five- (5) year com­ponent warranty will be issued to the heat plate exchangers, start­ing from the product delivery date.

The component warranty does not extend to the direct or indirect
expenses caused by the changing of a component. Otherwise, all
terms and limitations of the product warranty apply for the com­ponent warranty, as well.

Warranty limits

The warranty does not extend to the expenses (travel, power con­sumption, etc.) caused by a malfunctioning device, the buyer’s
production loss, loss of earnings or other indirect expenses.

This warranty has been given on the condition that the product
is working in normal operating conditions, and that the operating
instructions are followed carefully. The liability of the guarantor
is limited according to these terms and conditions, and the war­ranty does not extend to such damage as the product may cause
to another item or person.

The warranty does not extend to direct personal injuries or dam­age to property caused by the delivered product.

The warranty presupposes that the installation has followed all
valid regulations, generally accepted methods of installation and
installation instructions given by the manufacturer of the prod­uct.

The warranty does not extend to or is not valid in case the prod­uct is used in any other way than required by the sizing.

The customer is obliged to perform a visual check on the product
before the installation, and it is not allowed to install a product
that is clearly faulty

The warranty does not cover malfunctions, which have been
caused by

 the transportation of the product
 the carelessness of the product operator, the overload

of the product, the failure of adhering to the operating
instructions or maintenance

 circumstances beyond the guarantor’s control, such

as voltage fluctuations (the maximum range of volt­age fluctuations is +/- 10%), lightning, fire or acci­dents other than those caused by the repair work,
maintenance or structural changes done by authorised
resellers

 product installation or positioning on the operating

site, which is in contradiction with the installation,
operating and maintenance manual, or otherwise in­correct.

The warranty does not extend to the repair of defects that are
insignificant as far as the product’s operating condition is con­cerned, such as surface scratches. The warranty does not extend
to the normal adjustments of the product as outlined in the oper­ating manual, operation training visits, maintenance and clean­ing measures, or such work which is caused by the neglect of
safety or installation regulations or the settlement of this on the
installation site.

The warranty terms outlined in the joint recommendation of the
Association of Finnish Metal and Engineering Industries and the
Finnish Competition and Consumer Authority are observed to
such an extent which has not been separately mentioned above.

The warranty becomes void, if the product is

 repaired or altered without Gebwell Ltd.’s permission
 used for a purpose, for which it has not been intended

6 Gebwell Gemini Installation, operation, and maintenance manual

 stored in a humid or otherwise unsuitable location

(cf. installation, operating and maintenance manual).

What to do if a malfunction occurs

If a malfunction occurs during the warranty period, the customer
must immediately (normally within 14 days) notify the author­ised Gebwell reseller from whom the product was bought. The
notification must include which product has malfunctioned
(product model, serial number), the details of the malfunction in
as much detail as possible, as well as the circumstances when the
malfunction has developed and/or occurs. The warranty form,
correctly filled in at the handover time must be submitted on re­quest. Appealing to a warranty-period notification is not valid
after the warranty period is over, unless the notification has been
submitted in writing during the warranty period.

The notification must be submitted immediately after the mal­function has been discovered. If the notification is not submitted
immediately once the buyer has noticed the malfunction, or
when the buyer should have noticed the malfunction, the buyer
loses the right to appeal to this warranty.

Maintenance service in Finland

Maintenance work for this product, during the warranty period
and after the warranty period, is performed by the maintenance
organization authorised by the manufacturer, throughout the en­tire estimated economic life of the heat pump.

How to submit a service request

All warranty repairs, service requests and orders for spare parts
will primarily be submitted directly to the authorised Gebwell
reseller that sold/delivered the product. Before submitting a
service request, the following things must be taken into consid­eration:

 read the installation, operating and maintenance man-

ual carefully and think whether you have used the de­vice in accordance with the instructions in the manu­als

 before submitting a warranty repair request, ensure

that the warranty period is still valid, read the war­ranty terms carefully and find out the product’s
model and serial numbers

 all parts belonging to a device must be included when

the device is returned

 the returned product must be closed in such a way,

that handling it would not cause health or environ­mental hazards.

A device changed on the basis of the warranty is the property
of the device manufacturer. Gebwell Ltd. reserves the right to
decide how, where and who will perform the repair work or
change that is at the manufacturer’s responsibility.

Gebwell Ltd. is not liable for the breakdown of a wrongfully in­stalled device.

The device can only be repaired by a professional. Incorrect re

­pair work and settings can cause danger for the user, the mal­function of the device, and weaken the efficiency of the device.
The visit of a retailer or a service agent is not free of charge even
during the warranty period, in case the device has to be repaired
due to incorrect installation, repair or adjustment.

v1-6 29082018 7

2 INSTALLATION RECORD

The heating system must be inspected before commissioning following in-force regulations. Only qualified persons may conduct the in­spection. The below installation record must be filled out before handing the device over to the end user. The completed installation record
is also a condition for the validity of the warranty.

x Description Note: Inspected by: Date:
Collector:
System pressure tested
System flushed
System vented
Brine
Expansion vessel
Mud separator
Safety valve
Shut-off valve
Collector loop 1, length
Collector loop 2, length
Collector loop 3, length
Collector loop 4, length
Collector loop 5, length
Collector loop 6, length
Collector loop 7, length
Collector loop 8, length
x Description Note: Inspected by: Date:
Heating system:
System pressure tested
System flushed
System vented
Safety valve
Diaphragm expansion vessel
Mud separator
Pressure gauge
Shut-off valve
Admission valve
Buffer reservoir
x Description Note: Inspected by: Date:
Domestic hot water:
System pressure tested
System flushed
Safety valve
Pressure gauge
Buffer reservoir
x Description Note: Inspected by: Date:
Electricity:
Property fuses
Heat pump fuses
Phase sequence
32A power socket
Outdoor temperature sensor

8 Gebwell GEMINI

3 HEAT PUMP OPE RATING

INSTRUCTIONS

3.1 General

Gebwell GEMINI is a perfect heat pump, which saves energy
and offers efficient technical possibilities. A well-designed and
appropriately dimensioned ground source heating system is af­fordable in terms of operating expenses and energy efficient.
With a heat pump, you can efficiently heat both interior air and
domestic hot water. In summer, the system can also be used to
cool interior air in an environmentally friendly fashion.

3.2 Ground source heat energy

A heat pump collects heat from the ground and transfers it inside
the building. The heat can be collected using pipes sunk in a
bored well, heat collection pipes installed near the ground sur­face or pipes anchored at the bottom of a water system.

Bored well as a heat source

Ground as a heat source

Water system as a heat source

More information on heat collection systems and their scaling
can be found on the website of Gebwell Ltd. and the Finnish
Heat Pump Association.

www.gebwell.com

www.sulpu.fi

3.3 Ground source cooling

The cold temperature of the brine can also be used to cool dwell­ings. In summer, the free cooling energy can be transferred from
the ground with just a circulation pump. The heat pump system
can be connected to the convection heaters of the ventilation sys­tem or an underfloor heating/cooling system for cooling pur­poses.

3.4 Heat pump’s operating principle

The heat pump’s refrigerant circuit includes four main compo­nents:

 Evaporator
 Compressor
 Condenser
 Expansion valve

The heat in the ground is absorbed into a liquid solution circu­lating in the heat collection pipes.

In the evaporator, the liquid comes into contact with the refrig­erant that, when vaporised, binds heat energy from the liquid so­lution that circulates in the ground. The liquid solution returns to
the ground about 4°C cooler than when coming out to the sur­face. The lowest permissible temperature for the liquid solution
coming to the heat pump is -5°C.

The compressor increases the pressure and temperature of the
refrigerant. The refrigerant also absorbs the heat energy gener­ated by the compressor’s operation.

v1-6 29082018 9

The hot refrigerant is conveyed to the condenser, where the heat
energy of the refrigerant is transferred to the water circulating in
the building’s heating system. The refrigerant condenses into liq­uid upon releasing heat energy.

The pressure of the refrigerant remains high when being trans­ferred to the expansion valve. In the valve, the refrigerant’s pres­sure decreases rapidly. From the expansion valve, the refrigerant
passes on to the evaporator where it is once again evaporated. At
this point, the refrigerant absorbs heat from the liquid solution
circulating in the heat collection piping.

3.5 Heating functions

DOMESTIC HOT WATER

The heat pump produces domestic hot water based on the B3
measurement sensor. The domestic hot water’s switching differ­ential is 5 degrees. The compressor is factory set to activate when
the measurement value drops under +50°C and deactivated when
the value reaches +55°C.

HEATING

The heat pump produces heating water directly into the build­ing’s heating network in accordance with the set point that is
created from the outdoor temperature and the set heating curve.
The control automation activates the charging on the basis of the
calculated set point and return water measurement (B71) formed
by the controller. The heat pump’s return water switching differ-
ential (2840) setting defines the compressor’s activation and de­activation points. When the return water measurement value is
less than the set point by half of the return water switching dif-
ferential, the compressor is activated. The compressor turns off
when the return water measurement value reaches the set point
+ half of the return water switching differential. The automation
reduces temperature rise in the return water set point above the
condenser.

Example: Return water switching differential (2840) 6°C. Out­put water set point: 30°C. Condenser’s temperature difference Δt
6K.

The charging procedure is activated when the return water meas­urement value (B71) reaches 21°C. The charging ends, when the
return water measurement value is 27°C. The heat pump’s charg­ing pump rotates whenever it is in heating mode.

MIXING HEATING CIRCUIT:

The heating circuit’s output water set point is calculated in ac­cordance with the outdoor temperature measurement and the set
heating curve. The controller controls the 3-way mixing valve
and keeps the heating circuit’s output water temperature at the
set point.

HEAT SUPPLY AND SOURCE PUMP:

In order for a heat pump to function at the best possible effi­ciency, the conditions of the heating system and collector must
be ideal. The difference between the heating system’s output and
input temperatures must be 6°C–10°C and the output and input
temperature difference of the collector must be 3°C–4°C. Effi­ciency and savings are reduced at temperature differences other
than those described above.

Factory settings:

Charging pump: 7°C

Source pump: 4°C

3.6 Tips for saving

The heat pump's function is to produce heat and domestic hot
water according to your wishes. The system aims to fulfil these
wishes by all means available, within the framework of the set
values.

Important factors affecting the energy consumption are the inte­rior temperature, hot water consumption, hot water temperature
level, the insulation level of the real estate, as well as the desired
level of comfort.

Please note the above points when making changes on the device
for settings.

IMPORTANT!

Thermostats for floor heating and radiators can have a negative
impact on energy consumption. They slow down the flow in the
heating system and the heat pump will compensate this by rais­ing the temperature of the network. This will affect the operation
of your device consuming more electricity. Thermostats are de­signed to react only to control of so-called free-heat (sun, heat

generated by people, fireplaces, etc. ...).

10 Gebwell GEMINI

4 DELIVERY AND

HANDLING

4.1 Delivery contents

 Heat pump
 Outdoor temperature sensor
 Installation, operation and maintenance manual
 Spare seals
 Commissioning and warranty protocoll
 External source pump

4.2 Optional accessories

 External source pump
 Spare valve
 Room sensor (wired)
 Room unit (wired)
 Collector valve group
 Pump heating circuit
 Heating control group
 Cooling control group
 SMS/WEB server, SMARTWEB
 Buffer reservoir for domestic hot water
 Buffer reservoir for heating
 Domestic hot water control group
 Charging package for domestic hot water
 Pool heating set
 Diaphragm expansion vessel for collector
 Diaphragm expansion vessel for heating
 Energy measurement (ONLY AS FACTORY IN-

STALLATION, NO RETROFITS)

 Fixed fuel burner control
 Additional heat source control
 Cooling control
 Modbus communication module

4.3 Storage

Before installation, the heat pump must be kept in its delivery
package in a dry and warm location.

4.4 Transport

The heat pump may be temporarily tilted, but it must not be left
inclined for a long period of time, not even in transit. The heat
pump’s maximum tilt angle is 20°. It is not recommended to
turn the pump on its side. However, if there is a need to turn the
heat pump on its side, for transport purposes, for example, the
compressor unit must be removed for the duration of transit. In
any case the heat pump must not be transported on its back. If
the heat pump has been tilted in transit, you must allow the pump
to stand upright for at least two hours before activation so that
the compressor’s lubrication oil has time to reach the required
locations. Only lift the heat pump by the pallet. The pump must
be transported on the pallet all the way to the installation loca­tion.

4.5 Removal from package and transport

to final installation location

The product is delivered without the upper device module being
mounted. All products included in the delivery are packed on the
same pallet.

NOTE! THE HEAT PUMP MUST NOT BE TRANSPORTED
IF ONLY THE LOWER COMPRESSOR UNIT IS DE­TACHED FROM THE FRAME. IF THE HEAT PUMP HAS
NOT BEEN ATTACHED, THE UPPER COMPRESSOR UNIT
MUST ALWAYS BE DETACHED BEFORE DETACHING
THE LOWER COMPRESSOR UNIT.

 Ensure that you have received the correct products

with the correct accessories.

 Remove the packaging material, and inspect the heat

pump for any transport damage. Notify any damage
discovered to the transport company.

 Move the heat pump close to the planned installation

location.

 Lift the heat pump off the pallet.
 Adjust the heat pump so that it is horizontally and

vertically level and stands firmly on the adjustable
legs.

 Ensure that the frame, with the exception of the ad-

justable legs, is not in contact with any building
structures.

 Lift the upper compressor unit in place.

4.6 Safety instructions

The following safety instructions are to be taken into account
when handling, installing and using the equipment.

 Turn off the device’s main switch before any mainte-

nance procedures

 Never compromise safety by bypassing safety de-

vices

v1-6 29082018 11

 Only qualified personnel should conduct maintenance

/ repair measures on the cooling unit of the equip­ment

 The heat pump is not to be flushed with water
 Keep all the shell plates in place to prevent water

splashing on the electronic components of the equip­ment.

4.7 Heat pump’s location

A variety of matters related to safety, comfort of use and mainte­nance must be considered when positioning the heat pump.

The temperature of the location must be between +5°C and
+30°C. The room must be sufficiently ventilated. If the humidity
in the room is high, water condenses on the cold pipe sections of
the collector.

The heat pump compressor generates noise that may be con­veyed to other spaces via the building’s structures. It is recom­mended to use flexible parts in the pipe connections. The heat
pump must be positioned in a way that the sound does not disturb
any living areas. If necessary, soundproofing of the wall struc­tures between the room in which the pump is located and the
living areas can be reinforced and extra rubber pads installed un­der the pump’s legs. We recommend placing the heat pump in a
separate technical room. The sound transmitted through struc­tures can be limited with the floor structures of the pump room
and other solutions. A separate cast floor cut off from the build­ing’s other spaces prevents noise from being carried to living ar­eas through the floor.

Reserve at least 700 mm of maintenance space in front of the
pump so that the compressor unit can be taken out for mainte­nance. For the same reason, do not install the pump below the
floor surface.

4.8 Mounting and unmounting the upper
compressor unit

For ease of installation Gebwell Gemini is delivered without the
upper compressor unit being mounted. The upper compressor
unit must be mounted only after the heat pump has been placed
on a solid installation platform and adjusted in a horizontally and
vertically level position.

1. Detach the front panel by opening the screws on top
of the device.

2. Detach the mounting plate of the user terminal dis­play by opening the screws in the frame support rails.
Place the display on top of the device for the duration
of installation.

NOTE! The display cable can be unconnected from
the back of the user terminal if necessary.

3. Lift the compressor unit up to the mounting level by
means of a vertically adjustable table.

4. Position the unit gently in place by pushing from the
front while pulling it from the lifting loops at the

back.

5. Attach the compressor unit to the frame support rails
using the fixtures included in the delivery.

6. Put the gaskets (in a bag taped to the piping) in place
and tighten the nuts.

7. Connect the mains plugs.

8. Attach the user terminal display to the frame, and
connect the display cable if you unconnected it.
Insulate the connecting points of the collector in or­der to prevent condensation during use. Insulation is
found in the equipment bag.

12 Gebwell GEMINI

5 HEAT PUMP STRUCTURE

5.1 GEMINI structure

A. Control centre
B. Electrical switches
C. Charge output device 1
D. Charge return device 1
E. Condenser device 1
F. Charging pump Q9.1
G. Conderser drain
H. Charge output device 2
I. Charge return device 2
J. Condenser device 2
K. Charging pump Q9.2
L. Condenser drain
M. Adjustable feet
N. Lifting loops
O. User terminal controller 2
P. Brine out device 1
Q. Brine in device 1
R. Soft-starter / compressor’s motor protection switch

device 1 (F1)
S. User terminal controller 1 (Master device)
T. Compressor1
U. Expansion valve 1
V. Brine out device 2
W. Brine in device 2
X. Soft-starter / compressor’s motor protection switch

device 2 (F2)
Y. Compressor 2
Z. Expansion valve 2

v1-6 29082018 13

5.2 Sensors

Inside the heat pump:

B81 Hot gas sensor

B91 Collector’s inlet sensor

B92 Collector outlet sensor

B21 Heat pump output water sensor

B71 Heat pump return water sensor

External sensors:

B9 Outdoor sensor

B10 Common output water sensor

Reservoir sensors:

B3 Domestic hot water

B4 Additional reservoir 1 (upper)

B41 Additional reservoir 2 (lower)

B42 Additional reservoir 3 (middle)

Heating circuit sensors:

B1 Output water temperature sensor 1

B12 Output water temperature sensor 2

B14 Output water temperature sensor 3

Room sensors:

B5 Room sensor 1

B52 Room sensor 2

B53 Room sensor 3

Other sensors:

B13 Pool sensor

B16 Cooling output water sensor

B22 Fixed fuel burner sensor

B38 Domestic hot water consumption sensor

5.3 Pumps

Inside the heat pump:

Q9 Charging pump

External pumps of the system:

Q8 Source pump (collector)

Heating circuit pumps:

Q2 Heating circuit pump 1

Q6 Heating circuit pump 2

Q20 Heating circuit pump 3

Domestic hot water pumps:

Q4 Domestic hot water circulating pump

Q34 Domestic hot water exchanger’s charging
pump

Other pumps:

Q10 Fixed fuel burner pump

Q19 Pool pump

Q24 Cooling circuit pump

5.4 Control valves

Y1 / Y2 Heating circuit 1 (open / closed)

Y5 / Y6 Heating circuit 2 (open / closed)

Y11 / Y12 Heating circuit 3 (open / closed)

Y23 / Y24 Cooling circuit (open / closed)

Y33 / Y34 Domestic hot water (open / closed)

5.5 Other controls

Q3 Domestic hot water change-over valve

Y21 Cooling change-over valve

Y28 Cooling pump/change-over valve

Y28 Jäähdytyksen pumppu/vaihtoventtiili

14 Gebwell GEMINI

6 DIMENSIONS AND PIPE

CONNECTIONS

6.1 Heat pump connections

6.2 Pipe connections

1 Charge output Ø 35mm

2 Charge return Ø 35mm

3 Brine in Ø 35mm

4 Brine out Ø 35mm

v1-6 29082018 15

7 PIPE INSTALLATION

7.1 Collector

When viewing from the front, the heat pump’s collector pipes
are at the right edge of the device.

NOTE! In GEMINI devices the source pump must be installed
externally. The pump is delivered in conjunction with the equip­ment delivery. It is recommended that the pump is installed ver­tically to the line from the ground. In this way, air does not ac­cumulate inside the pump. External source pump is controlled
by leading heat pump’s controller.

 In the collector/brine, only use connection parts that

are intended for cold conditions.

 Install shut-off valves in the pipe connections as

close as possible to the heat pump.

 A dirt separator (filter) must be installed to the

collector’s line coming from the ground in
accordance with connection diagrams.

 Use supports insulated with rubber to support the

pipes.

 Ensure that water does not spill on the pump or in the

electrical devices during operation.

 The collector must be pressure tested at a pressure of

3bar and the test pressure must be maintained for at
least 30 min.

 Insulate all of the building’s source/brine pipes with

closed-cell insulation in order to prevent water con­densation.

 Rinse the pipes of any installation debris prior to

installing the heat pump

When measuring the collection circuit, the geographical loca­tion, soil type, heat pump’s efficiency and the property’s heating
needs must be taken into consideration.

When 40x4.2 PN6.3 PEM hoses are used

Device Recommended

length of collec­tion piping (m)

Recommended
active drilling
depth (m)

GEMINI 40kW 4x500 – 6x500 4x170 – 5x200

GEMINI 52kW 5x500 – 8x500 5x170 – 7x200

GEMINI 64kW 6x500 – 10x500 6x170 – 9x200

The table values are examples intended to be guidelines. Before
beginning installation, accurate calculations of the building’s
heat requirements must be prepared.

The maximum length for a single collector loop is 500 m. If there
is a need to install more piping, the piping must be divided into
two loops that are connected in parallel. The connection must be
conducted so that the loop flow can be balanced.

The collection piping must rise constantly towards the heat pump
in order to prevent air pockets. If this is not possible, venting
mechanisms must be installed at the high points.

UTILITY
ROOM

16 Gebwell GEMINI

EXAMPLE CONNECTION OF COLLECTION
CIRCUIT, 1-DEVICE CONFIGURATION

The collection circuit must be equipped with module-specific
line flow control valves as shown in the figure. The line flow
control valves must be adjusted device-specifically in order to
ensure optimal operation.

5. Brine in (from the ground)

6. Brine out (into the ground)

EXAMPLE CONNECTION OF COLLECTION
CIRCUIT, 2-DEVICE CONFIGURATION

5. Brine in (from the ground)

6. Brine out (into the ground)

INSTALLATION OF AN EXTERNAL SOURCE
PUMP

The source pump is included in the equipment delivery. Pump
capacity is to be determined for each heating system entity sep­arately. The electronic controller of the source pump is con­nected to the leading device, i.e. the master unit. Install the ex­ternal source pump to the source riser as shown in the figure in
accordance with the installation instructions included in the de­livery.

7.2 Charging circuit

See the charging circuit’s connection in the connection options
below or the site-specific diagram. Note separate returning water
lines for domestic hot water and heating accumulator when con­necting charging circuit.

 Charging circuit is connected at the back of the de-

vice.
 Install the required protective devices, mud separator

(strainer) as well as the shut-off and check valves.
 Residual installation impurities must be flushed from

the building’s heating system pipes before installing

the heat pump.
 It is recommended to perform the installation to a

closed heating system with a diaphragm expansion

vessel.
 Ensure that water does not spill on the pump or in the

electrical devices during operation.
 The product must be protected against overpressure

with a safety valve. The safety valve’s maximum

opening pressure must be 2.5 bar, and the valve must

be installed in the heating system’s return pipe. It is

recommended to lead the overflow pipe of the safety

valves to the nearest floor drain. Install the overflow

pipe so that the water can flow out of the pipe with-

out obstructions.
 A connection to a system equipped with thermostats

requires a bypass valve to be installed in all the radia-

tors or that a few thermostats be removed to ensure

sufficient flow. Refer to Technical specifications ta-

ble for pump’s minimum flow
 The heating system must have the device’s minimum

flow, refer to the Technical specifications table for

the minimum flow

Connection of charging circuit, heating/domestic hot water

Note that, when connecting the charging circuit, a dedicated
heating line must be brought from the domestic hot water
heating accumulator to the leading compressor unit control­ling the heat pump, and a common heating line from the
heating network to both compressor units. A faulty return
water connection mixes the domestic hot water and heating
flows and may cause problems in the operation of the system!

The heat pump must be equipped with a non-return valve, as
shown in the figure, in order to secure proper operation. The
equipment cannot be operated without a non-return valve.

The devices have internal heating line pumps, one for each com­pressor unit.

v1-6 29082018 17

Install dedicated filters for both compressor units in the heating
circuit as shown in the figure.

1. Charging output, to the domestic hot water heating
accumulator (master unit)

2. Charging return, from the domestic hot water heating
accumulator (master unit)

3. Charging output, to the heating network

4. Charging return, from the heating network

Connection of charging circuit, heating

In the example figure, the heat pump produces heating only for
the building heating system. If connected as shown in figure, the
device does not produce heating for domestic hot water.

3. Charging output, to the heating network

4. Charging return, from the heating network

Connection of charging circuit, 2-device configuration

In the example figure, the upper compressor unit of the leading
device produces heating for domestic hot water, and all four
compressor units together produce heating for the building heat­ing system.

1. Charging output, to the domestic hot water accumula­tor (master unit)

2. Charging return, from the domestic hot water accu­mulator (master unit)

3. Charging output, to the heating network

4. Charging return, from the heating network

CONNECTION TO THE DOMESTIC HOT
WATER AND HEATING ACCUMULA­TOR

CONNECTION TO THE DOMESTIC HOT
WATER ACCUMULATOR AND DI­RECTLY TO THE BUILDING HEATING
NETWORK

INSTALLATION OF CHANGE-OVER
VALVE

18 Gebwell GEMINI

Install the change-over valve in accordance with the instructions
included in the product package. Exercise great care when posi­tioning the actuator to the valve arbour. An incorrectly installed
actuator can cause equipment failure.

A. Charging, domestic hot water (Esbe, square)

B. Charging, heating (Esbe, triangle)

AB. Charging from the heat pump (Esbe, circle)

7.3 Connections of an additional heat
source

Connection of an additional heat source to the heating circuit

The additional heat source can be an oil-fired boiler, natural gas,
district heating or an electric boiler.

The additional heat source affects the pipe connection; the cor­rectness of the connection should be confirmed with the equip­ment supplier or representative. The example connection is pre­sented as a diagram with an oil-fired boiler.
Connecting the additional heat source in series with the heat
pump is recommended. The series connection enables optimal
operation of the heat pump with the additional heat source. In the
series connection, the heat pump acts as the primary heat source,
after which the additional heat source compensates for the heat
deficit of the supply pipe by starting to operate. The additional
heat source requires commissioning the regulator.

The additional heat source control does not include a power
supply for the actuator. The complete additional heat source con­trol package LVLLO1B includes a power supply for the actua­tor.

The flow sensor B10 is included in the standard heat pump de­livery.

If a 3-way mixer valve is used to regulate the additional heat
source, the valve must be dimensioned and selected based on the
heating system.

The actuator and valve are not included in the LVLLO1B pack­age

7.4 Extraction air heat recovery

The extraction air heat recovery system circulates brine to an ex­traction air radiator without any need for a collection circuit. Ob­serve the manufacturer’s instructions when installing the extrac­tion air radiator. The capacity of the heat pump is to be deter­mined on the basis of the capacity of the extraction air radiator
and the cooling output capacity of the heat pump.

Example of extraction air heat recovery connection

7.5 Connections for external fixed fuel
burners

Burner control

Burner control refers to any uncontrolled heat source such a
wood burner or a burner equipped with water circulation. The
optional accessory Burner control (KPAKO1A) enables the in­tegration of a wood burner in the heating system. Heating distri­bution is to be implemented by means of separate control groups
in order to control output water temperature. In the example con­nection shown below, the heat pump controller commands the
burner charging pump Q10 in accordance with the programmed
temperature set points on the basis of temperature measurement
output from the accumulator and the wood burner.

7.6 Connecting of domestic hot water sys­tem

The domestic hot water system must be equipped with a safety
valve (max 10bar) installed in the cold water line as shown in the
figure. It is recommended to lead the overflow pipe of the safety
valves to the nearest floor drain. Install the overflow pipe so that
the water can flow out of the pipe without obstructions.

The domestic hot water safety valve may leak nearly every time
higher consumption of warm domestic hot water ceases. The
overflow is caused by the thermal expansion of cold water and
pressure shocks. The safety valve leak can be prevented by in­stalling an expansion vessel in domestic hot water network. The
vessel evens out the pressure changes and prevents pressure
shocks.

5. Cold water

6. Domestic hot water

7. Domestic hot water circulation

v1-6 29082018 19

RESERVOIR TANK FOR THE DOMESTIC HOT
WATER SYSTEM

If the consumption of domestic hot water is high, the heat pump
can be supplemented with an electrically heated additional res­ervoir. The heat pump heats the cold water in the internal reser­voir, after which the water is led to the external buffer reservoir.
The electric resistance of the external reservoir maintains the
temperature at the desired level. The system uses the external
reservoir to prepare for spikes in the consumption of heat energy.
If there are radiators in the circulation of hot water, the connec­tion must be confirmed by an HV engineer.

20 Gebwell GEMINI

8 ELECTRICAL CONNEC-

TIONS

8.1 General

Electrical installations and possible services may only be carried
out under the supervision of an authorised electrician. The heat
pump’s power supply is brought through the opening at the back
of the device. The device is connected to a power grid of 400V
(50Hz).

The heat pump’s power supply may not be switched on before
the heat pump’s heating network has been filled with water. This
may cause the electrical heater, overheat protector, pumps or
compressor to get damaged.

 The heat pump must be disconnected before insula-

tion measurement.

 The heat pump wiring diagram can be found in Ap-

pendix Electrical diagram.

 If a circuit breaker is used for the heat pump, it

should be of type C (slow). Check the correct fuse
size on Technical specifications

 Cabling of the heat pump's electrical accessories

should be made through the lead-through of control
centre on the back of the heat pump.

 The heat pump’s internal circulation pumps, automa-

tion and their cabling are protected with automatic
fuses.

8.2 Power supply

The power supply is connected to connectors (2) L1, L2, L3
through the cable opening (1). Pay attention to the correct phase
sequence to ensure correct rotation direction of the compressor.

8.3 Compressor’s motor protection
switches (F1 and F2)

The compressor’s motor protection cuts off the power supply to
the compressor, and acts as the operating switch for the compres­sor.

Reset: Reset the compressor’s motor protection (F1 upper com­pressor unit / F2 lower compressor unit) by holding down the
green button (ON position)

Motor protection setting:

Gemini 40: 19A
Gemini 52: 24A
Gemini 64: 28A

8.4 Phase sequence / soft starter

Heat pump’s compressor has a three-phase motor. It is important
that the phase sequence be connected correctly. Pump notifies of
incorrect phase sequence on the controller screen with the text
Soft starter E25 failure. The compressor’s motor protection must
be in ON position, so that the phase notice can be reviewed. If
the motor protection switch is in the OFF position, the controller
will always give a notice: Soft starter E25 failure. The soft starter

notifies all interferences with a red LED light on the front panel
of the soft starter. The amount of LED light flashes indicates the
failure. See soft starter failures in section Failures / soft starter

failures

8.5 Connection of temperature sensors

Outdoor temperature sensors are connected to the heat pump
RVS controller. The sensors are included in the delivery of the
heat pump control centre. For the placement of the sensors, see
the HW diagram included in the delivery and the wiring diagram
on the inside of the control centre lid.

Outdoor sensors are always connected to the master unit. If the
heating system has more than one mixing heating circuits, the
output water flow sensor of Heating circuit 2 must be connected
to device unit 2.

OUTDOOR SENSOR (B9)

The outdoor temperature sensor (B9) is already wired to the con­trol centre.

Position the sensor in a shaded location on the north or north­east wall. Do not place the sensor near windows or doors.

Connection: connector k, BX9/M

COMMON FLOW SENSOR B10

The common flow sensor of the heat pump is the control sensor
of the cascade system. Place the sensor in accordance with the
HW diagram included in the delivery. If any external heat
sources controlled by the heat pump are connected to the heating
system, sensor B10 is the control sensor of such external heat
sources.

Connection, connector u, BX2/M

DOMESTIC HOT WATER FLOW SENSOR B3
(ACCUMULATOR)

The domestic hot water flow sensor B3 is the control sensor of

COMMON OUTPUT
WATER

WH
BR

WH
BR

WH
BR

VH
BR

WH
BR

v1-6 29082018 21

domestic hot water production. Sensor B3 is placed in the sensor
pocket of the domestic hot water accumulator in accordance with
the HW diagram.

Connection, connector h, BX8/M

HEATING CIRCUIT FLOW SENSOR B1

Mixing heating circuit flow sensor B1 is the control sensor of the
heating network. Sensor B1 is placed on the heating circuit out­put line at a distance of approx. 1 m from the 3-way mixing
valve.

Connection, connector p, BX11/M

HEATING CIRCUIT FLOW SENSOR B12

Mixing heating circuit flow sensor B12 is the control sensor of
the heating network. Sensor B12 is placed on the heating circuit
output line at a distance of approx. 1 m from the 3-way mixing
valve.

Connection: Controller 2, connector p, BX11/M

If the first heating circuit (Heating circuit 1) of the heating sys­tem is a pump heating circuit (i.e. not equipped with a 3-way
mixing valve), the flow sensor of Heating circuit 2 must be con­nected to controller 1.

Connection: Controller 1, connector p, BX11/M

8.6 Connection of the domestic hot water
charging package (HWExE)

The domestic hot water charging package is connected to the
GW extension module (Domestic hot water). The domestic hot
water charging package requires a circuit for hot water circula­tion. If the heating system is not equipped for such a circuit, the
jump wire (H21/M) is to be replaced by a domestic hot water
flow switch.

Domestic hot water flow sensor B38, BX21/M

Domestic hot water charge pump Q34 control (pwm), UX21/M

Power supply to domestic hot water charge pump 230VAC,
QX23 / N /PE

8.7 Connection of domestic hot water mix­ing valve (HWEx)

The domestic hot water mixing valve is connected to the GW
extension module (Domestic hot water). The domestic hot water
mixing valve requires a circuit for hot water circulation. If the
heating system is not equipped for such a circuit, the jump wire
(H21/M) is to be replaced by a domestic hot water flow switch.

Domestic hot water flow sensor B38, BX21/M

Domestic hot water mixing valve Y33/Y34, QX21/QX22/N

8.8 Control of electric heaters in the accu­mulator / sequence controlled addi­tional heating

The heat pump can be used for controlling electric heaters in the
accumulator or another sequence controlled heat source. There
are several different control modes for the electric heaters. The
electric heaters must be programmed site-specifically according
to the pertinent plant diagrams. For programming, see section

Site-specific definition / Programming of electric heaters.

DOMESTIC HOT
WATER
Flow sensor

GEBWELL HEAT PUMP

EXTERNAL

DOMESTIC HOT WATER
CHARGE PUMP
Q34
Max 1.5A

EXTERNAL

GEBWELL HEAT PUMP

DOMESTIC HOT WA­TER
Flow sensor

DOMESTIC HOT WA-

DOMESTIC HOT WA-

GEBWELL HEAT PUMP

EXTERNAL

DOMESTIC
HOT WATER
MIXING VALVE

WH
BR

BL
BR

BR
Y/GR
BL

WH
BR

BR

BLU
WH

BR
BLU
WH

22 Gebwell GEMINI

NOTE! The resistor controls are connected to controller 2!

The thermostat and overheat protector combination, included in
the delivery of the accumulator electric heater, must be con­nected to each electric heater. The thermostats must be adjusted
at a value greater than the maximum set point defined for the
heat pump.

Connecting electric heaters directly to the group distribution
board can cause excessive power consumption. We recommend
installing always a separate automatic transfer switch for con­trolling the electric heaters.

Control relays of electric heaters:

Controller 2:

QX1 Electric heater of output water K25
Connector W Control 230VAC

Controller 2:

QX2 Electric heater of output water K26
Connector W Control 230VAC

Controller 2:

QX3 Electric heater of domestic hot water K6
Connector X Control 230VAC

If both of the Gemini compressors in a cascade system have been
connected to produce domestic hot water, the heating resistor
control is to be connected to the first device that only produces
heating. In that case, the resistors must also be programmed to
the QX relay outputs of said controller.

8.9 Change-over valve(s)

Change-over valves are connected to the heat pump control cen­tre’s row connectors Q3, N and L10. In a cascade system, the
connection is ALWAYS made to the master device.

Q3 = black (control 230VAC)

N = blue

L10 = brown (continuous 230VAC)

Actuator connection:

8.10 Heating circuits

Three heating circuits can be controlled with the heat pump con­troller. The circuits can be pump or mixing circuits. Note that
when connecting the heating group’s pump, the control’s maxi­mum current is 0,7 A. If the pump’s current is greater than the
maximum current permitted for the controller, the pump must
have a separate pump control centre.

MIXING HEATING CIRCUIT

The heat pump’s controller can be used to control one heating
control group and one pump heating circuit. The heating’s first
control group is always connected to the heat pump’s controller.
If there are more than one control groups, the heat pump must be
equipped with a GW-extension module.

Mixing heating circuit:

BX11 Output water sensor
Connector p ntc10k
QX10 3-way valve open
QX11 3-way valve closed
Connector T Control 230VAC, 3-point
QX9 Mixing heating circuit’s pump
Connector S Control 230VAC, max 1,5A

PUMP HEATING CIRCUIT

The pump heating circuit’s circulation pump is connected to the
heat pump’s controller.

QX12 Pump heating circuit’s pump

Connector U Control 230VAC, max 0,7A

HEATING

CIRCUIT PUMP

MAX 0,7A

MIXING HEATING CIR-

CUIT PUMP MAX 0,7A

HEATING CIRCUIT 1
OUTPUT WATER

HEATING CIRCUIT 1
VALVE MOTOR
230V 3-PHASE
CONTROL

ACCESSORY
Control, Electrical heater
DHW K6 (CUK3)

ACCESSORY
Control, Electrical heater

Outp

. Wat. K25

(CUK3)

ACCESSORY
Control, Electrical heater
Outp. Wat. K26 (CUK3)

BR
BLU
BL

BR
BLU
BL

WH
BR

BR
BLU

WH

WH
BR
BLU

Y/GR

Y/GR

Y/GR

Y/GR

v1-6 29082018 23

8.11 Domestic hot water’s circulation pump

The domestic hot water’s circulation pump can be connected to
the heat pump’s controller.

QX13 Domestic hot water’s circulation pump

Connector V Control 230VAC, max 0,7A

8.12 Connection of external source pump

Connect external source pump according to the instructions de­livered with the pump.

The source pump must be programmed in connection with
commissioning. Refer to section commissioning for instruc-

tions, or the quick guide delivered with the source pump.

Set the pump to a standard curve/fixed speed so that the device­specific flows can be adjusted to the correct values.

See adjustment instructions in the manual delivered with the
pump.

8.13 Connection of room unit, QAA74

Room unit is connected to controllers BSB-bus on connector b.

8.14 Room sensor (acceossory) QAA55.

Room sensor is connceted to controller’s bus. Connection in­struction below

8.15 Alarm forwarding

The possible heat pump alarms can be forwarded e.g. to building
automation or a modem. The alarm forwarding is connected to
the fault relay K10 on the control centre. Closing alarm infor­mation (NO) is received from connectors 11/14 and opening
alarm information (NC) from connectors 11/12. Use a 2-pole ca­ble with a cross-sectional area of 0,5mm

2

at the minimum.

8.16 Call for heating 0-10V

The heat pump can be controlled by using an external heat re­quest. A 0–10 V regulation message can be used to set a set point
for the output of the heat pump into the heating system. In that
case, the heat pump is slaved to the upper-level automation

The function should be activated on the heat pump’s menu.
If the heat pump is equipped with energy meters, the function
requires a GW expansion module.

Refer to section Site-specific definition / Call for heating

H3 / M Consumer’s call VK2 10V

Connector e Control message 0 – 10V

8.17 External prevention of activation / re­lease signal

The heat pump can be given a prevention message for activation
with an external potential free switch. In this case, the compres­sor and electrical heaters are locked. The heat pump will return
to normal functioning once the message has been removed. The
function can be used, for example, if there is a lot of simultane­ous electrical load at the property. With this function, the activa­tion of the heat pump can be prevented. Käynnistyksen esto tulee

HEATING

CIRCUIT PUMP

MAX 0,7A

EXTERNAL

ROOM
SENSOR
QAA55

EXTERNAL

closing switch

Y/GR

Y/GR

Y
BLU

R
Y
BL

U

R BLU Y

24 Gebwell GEMINI

tehdä kaikkiin säätimiin.

Prevention of activation must be done to all controllers.

8.18 Tariff control

The electric utility’s low tariff message can be received via the
EX3 input. The external control must be a potential free closing
switch. The control activates the forced charging of the heating
reservoir.

8.19 Installation of extension module

The extension module is delivered in conjunction with a separate
control centre. The control centre is equipped with a mains plug
(230V, 50Hz). The extension module is connected to the heat
pump controller with a BSB bus. Connect the bus cable to inlet
b (cl+/cl-) as shown in the figure. If several modules are being
installed to the heat pump, the addresses must be set at the dip
switches.

*Dip switches

8.20 Connection of a cascade connection

Several heat pumps (Gebwell T, GEMINI and Taurus-series) can
be connected to one cascade system. The system’s main device
is defined as the master device (controller 1). There can be 15
slave devices (controllers). Device addresses must be specified
for the devices in the LPB system menu.

Connect the data cables in accordance with the image between
the devices. The cable is delivered with the device (5m/device).

Use 2-pole cable with cross-sectional area of 0,5mm

2

at mini-

mum.

8.21 Connection of additional heat source

The additional heat source is controlled with an on/off (K27)
control, and the supply water temperature is adjusted according
to the B10 measurement with a 0–10 V regulation message.

If an actuator is used to make the adjustment, the heat pump must
be equipped with the accessory LVLLO1B, which includes a
24V power supply for the actuator as well as a K27 on/off start
relay for the control.

The controller controls the K27 relay with a 230V voltage con­trol, and the K27 relay has a voltage free contact for the control.
0–10 V regulation message for the heat source from the control­ler’s connector z (UX1/M).

Circuit diagrams attached.

COMPRESSOR’S EXTERNAL
ACTIVATION PREVENTION E6

TARIFF CONTROL E5

HEAT PUMP CONTROLLER
LEADING DEVICE 1

EXTENSION MODULE AVS

BSB-bus

MASTER DEVICE 1

DEVICE 2

DEVICE 3

v1-6 29082018 25

9 FILLING AND VENTING

9.1 Heating system

The heating system is filled with water up to the required pres­sure, and vented.

 Vent the system carefully before activating the com-

pressor. Air in the heating system may trigger alarms
in the system.

 Ensure that the system pressure is appropriate for op-

eration. The pressure must be 0.5 bar during filling
and approximately 0.5–1.0 bar once the reservoir has
warmed up. Check the pressure once the reservoir is
warm.

 The system must be equipped with an expansion ves-

sel and a safety valve in accordance with the HV
plan.

9.2 Filling the collector, non-pressurised

Fill the collector with a mixture of water and brine that can with­stand a temperature of at least -15ºC. We recommend bioethanol,
a liquid which is environmentally friendly.

Valves C and D are used for filling a filling group. Valve A must
be closed for the duration of the filling and venting operation.

Fill the system with purified brine. Ensure that any solids pre­sent at the bottom of the vessel do not rise into the intake pipe.
When circulating liquid with an external filling/venting pump,
ensure that no foam is produced when liquid is pumped into the
system. Where necessary, use two large vessels in order to pre­vent micro bubbles from entering the collection circuit. The re­moval of foam or liquid containing micro bubbles from the sys­tem can be difficult. Micro bubbles can cause equipment failure.

The collection circuit is pressurised using an external booster
pump (K) The pump is connected to valves C and D as shown in
the figure. When increasing the pressure of the collection circuit,
close valve A. Ensure that any solids present at the bottom of the
vessel do not rise into the intake pipe. Monitor the circuit’s pres­sure gauge I. The pressure must not rise above 2 bar.

Clean the filter before activating the heat pump. Close valves A
and B, and open filter E. Rinse the screen under running water.
Close the filter, and open valves A and B.

9.3 Pressure test of the collector

Perform a pressure test on the filled collector as follows: Increase
the pressure to 2bar and check the pressure in 30 minutes. The
system has a leak if the pressure has dropped during this time.
Repair any leaks and repeat the pressure test. Enter the pressure
test as completed in the Commissioning and warranty protocol
after a successful test. Remember to release the high pressure
after the test.

9.4 Venting of the collector’s horizontal
piping

When venting the collector, the horizontal piping must be vented
separately by closing the wells out of the venting loop. This pre­vents air from being circulated via the wells, and thus the air
bubble resulting from pumping does not end up in the well.
When you have vented the horizontal piping by circulating liquid
in both directions, and the liquid is completely clear (not foamy),
you can open the wells for the activation of the ground heat
source pump.

VENTING INDOOR WITH THE VALVE GROUP:

- CONNECT VENTING CONNECTIONS
TOGETHER

- CLOSE THE WELLS FOR THE DURATION OF
VENTING

26 Gebwell GEMINI

9.5 Cleaning the collector filter

Check filter E by first closing valves A and B, and opening the
filter’s cover. After cleaning the filter, open valve A first, in
which case air exits the filter’s nest to the expansion vessel F.
Open valve B.

10 ACTI VATING TH E HE AT

PUMP

Upon delivery, all the pump’s motor protection switches and
circuit breakers are in the 0 position.

When commissioning, the controller’s settings must be ac­cessed at Expert level.

Commissioner’s menu:

10.1 Before activation

Before activating the heat pump, ensure that

 the collector has been filled with heat transfer liquid
 the collector has been vented carefully
 the collector’s filter has been cleaned after venting
 all the collector’s valves have been opened
 the programming of external source pump has been

carried out

 the heating system has been filled with water
 the heating system has been vented
 the heating system’s water temperature should be

<20°C

 the domestic hot water system must be filled
 the outdoor sensor has been connected
 the heating sensors have been connected
 the electrical connections are correct
 the compressor’s motor protection switch (F1) is in

the OFF position

 electricity is lead to source pump
 the source pump’s line protection switch F4 is in OFF

position.

10.2 Activation

1. Set the heat pump’s main switch to (Q1) position I.

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2. Set the controllers’ line protection F10 and F11 to po­sition I.

The controller updates the information

3. Turn the domestic hot water off from the user termi­nal.

Operating mode: Stop

4. Set Simulation on from the user terminal, +30°C.
With this function, the call for heating is switched off

and the symbol appears on the display.

5. Start the venting of the collector and heating network
with the device’s own circulation pumps. (Refer to
section VENTING: Venting of collector and Venting

of charging circuit)

NOTE! The commissioning of the external source
pump must be carried out prior to venting and acti­vating the compressor. Refer to Commissioning of ex-
ternal source pump for instructions.

6. In connection with venting the heating network,
check on page 2/27 of the user terminal’s Source
menu that the heat pump’s return water temperature
and the input water temperature correspond to the
heating system’s water temperature. This indicates
that the charging circuit’s liquid is flowing.

7. In connection with venting the collector, check on
page 17/27 and 18/27 of the user terminal’s Source
menu that the source’s input temperature (row 8427)
and the source’s output temperature (8429) corre­spond to the ground temperatures. This indicates that
the collector’s liquid is flowing.

8. Set the compressor’s motor protection F1 to ON posi­tion

9. Reset the heat pump from the Special operations
menu

10. Set the Simulation heating mode from the user termi­nal to a temperature of -20°C.

11. If a change-over valve(s) have been installed to the
device, it (they) should turn to position B (flow to
heating network)

12. Source and charging pumps activate 1 minute before
the compressor.

13. When the compressor has activated, monitor the tem­peratures of the ground and charging circuits in the

Source menu

. The controller automatically sets the

condenser’s temperature difference to 7 degrees and
the evaporator to 4 degrees.

- Heat pump’s return water temp. (2/27)

- Heat pump’s output water temp. (2/27)

- Condenser’s temp. difference (16/27)

- Source’s input temperature (17/27)

- Source’s output temperature (18/27)

- Evaporator’s temp. difference (16/27)

Let the heat pump run for about 10-15 mins.

14. Set the domestic hot water on via the Domestic Hot
Water menu in the Commissioner menu.

Operating mode: On

o Change-over valve(s) turn to position A
o Let the temperature of the domestic hot wa-

ter rise to the set point.

o

NOTE! The compressor may not be reactivated more often
than 1 activation / 10 mins.

In connection with activating, there is often a “Soft starter fail­ure E25” failure message. When the motor protection is in ON
position, this usually indicates an error in the phase sequence.
By turning the input’s phase sequence, the heat pump activates
normally.

The heat pump does not register all alarms as alarms after the
first notice, but instead as status data. If the compressor does

not activate and a -symbol appears on the display, check the
current limitation’s cause in Error history. Troubleshooting
information can be found in the user manual in section TROU­BLESHOOTING/ALARMS.

10.3 Venting

The collector must be vented extremely thoroughly. Even a
small amount of air in the brine collector will prevent the
pump from functioning normally and can cause it to break
down.

In order to facilitate commissioning and troubleshooting, the
controller features an input and output test function. You must
be on the “Expert” level to use this function. The source and
charging pumps can be vented using this function.

Venting the collector

Venting the collector circuit is carried out using controller 2 of
the leading device. Display on the inside of the door.

1. Turn on the power supply of the source pump

2. Set the source pump’s manual switch S8 to position I.
→ The source pump activates to the minimum rotation
speed.

28 Gebwell GEMINI

3. If you hear noise, such as gurgling/bubbling, which in­dicates the presence of air in the circuit, shut down the
source pump from the S8 switch.

4. Let the air rise to the highest point of the collector and
open the vent valve. Ensure that the system’s expan­sion vessel has a sufficient amount of liquid.

5. When the venting is complete, continue rotating the
source pump (P1) and repeat until all air has been re­moved from the system.

6. You can leave the source pump on while venting the
charging pump.

NOTE! Pumping at excessively high power will disperse the air
in the brine in the form of microbubbles. This may trigger alarms
during the operation of the device. Therefore, you should begin
the venting in short cycles after which you drain the air out of
the vent valves.

Venting the collector with stronger pumping can be done with
the Input/output test function:

1. Select Input/output test

2. Set the relay test QX5 on

3. Switch the Relay test off in section Input/output test-
ing, (No test)

10.4 Venting the heat supply circuit

Venting the heat supply circuit must be carried out controller­specifically. (The both of GEMINI’s charging pumps)

1. Set the charging pump’s (LP/Q9) line protection
switch to position I.

2. Select Output test UX2 in the Input/output test menu

3. Set the desired rotation speed for the heat line pump.
Let pump rotate for a few minutes.

4. Turn off the pump by setting the Output test UX2 to
0%.

5. Let the air rise to the highest point of the system and
ensure that the vent valves are open.

6. Ensure that the heating system’s pressure is at a suffi­cient level, so that air can exit through the automatic
vent valves.

7. When the venting is complete, continue rotating the
pump and repeat until the air has been removed from
the system.

8. Finally, switch off the Output test UX1 “—”

Return to the activation of the heat pump in section 8.

10.5 Use without a collector and use during
construction site

The heat pump can be used for heating already before connecting
the collector. In this case, all the heat is produced with direct
electric energy. All the control functions of heating and domestic

hot water are, however, available. Note that the heating and do­mestic hot water circuits must be connected and vented, and the
electric connections must be fully completed.

If the heat pump is wished to be used for heating at a construction
site, the device must be set to emergency operation mode, which
ensures that the compressor (K1) and source pump (MLP/Q8)
are not activated. In this way, the heat pump makes sure that the
domestic hot water and heating is done with an electric heater.

When the display is in basic mode:

1. Roll the navigation roller to the symbol.

2. Select Special operations

3. Select Emergency operation and set the function on
by pressing the navigation roller and rolling the set­ting to the ON mode. Accept by pressing the naviga­tion roller.

10.6 Activation of a cascade system

Carry out the activation of cascade devices according to normal
activation. The activation of slave devices takes place by setting
the master device to Emergency operation mode. The domestic
hot water button is not significant in the activation of slave de­vices. If heating circuits have been connected to the slave de­vices, carry out a site-specific definition. (Refer to Site-specific
definition →Heating circuit)

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11 HEAT PUMP OPERATION

11.1 User interface

All the usual settings are made from the heat pump’s user termi­nal, and the wishes regarding comfort that the heat pump should
implement, are determined. The heat pump’s optimal utilisation
requires that certain basic settings are in force according to in­structions. Refer to section Basic settings

Q1: Main switch

F4.1: Line protection automation

Charging pump (LP1) Upper compressor unit

F4.2: Line protection automation

Charging pump (LP2) Lower compressor unit

F10: Line protection automation

Controller 1 (control)

F11: Line protection automation

Controller 2 (control)

S8: Source pump’s manual use

I = Manual

0 = Automatic

11.2 User terminal

AVS74 user terminal

11.3 Display symbols

Rights, user and expert levels:

Home, property details

Temperatures, heating/cooling

Domestic hot water settings

Info pages:

 Notifications (alarms, events)
 Property details
 Energy monitoring

Service/settings:

 Setting changes
 Special operations
 *Expert menu

* For experts only, maintenance companies, requires a
password:

Diagnostics pages

Settings/maintenance:

 Access to all parameters

Alarm

Alarm acknowledgment/requires
maintenance

Notification

Manual

Usage rights (1-3)

Heat source in process (e.g. oil/gas burner,
heat pump...)

30 Gebwell GEMINI

11.4 User levels

The controller features specified user levels, which enables that
only corresponding user groups can change settings. The device
is mainly used on End user –level. The mechanic installing the
heat pump uses device on Expert –level. Different user levels

can be accessed from Service/settings –menu.

11.5 Heating settings

The room temperature is dependent of several factors. During
warn seasons, the heat reflected from the sun, and heat given off
by people and various devices, often is enough to keep the room
temperature at a sufficient level. When the air cools down, a
heating system is needed. The colder it is outside, the warmer
the water is that circulates in the heating system. For the room
temperature to be at the right level, the basic settings must be
correct.

ADJUSTING WITH A HEATING CURVE

The starting point of the heating curve is the heat pump’s
damped outdoor temperature (average temperature of 15h) and
the heating system’s measured output water temperature. The
slope of the automation’s curve can be seen at the intersection
point of the two values. This is separately set for each heating
area.

The settings are made in the Maintenance/settings menu

NOTE! The heating curve setting is based on a room tempera­ture of 20°C. If the room temperature set point is changed, the
heating curve is changed automatically according to the new
value.

Example values for adjusting the slope of the heating curve:

Factory setting: 0,5

Floor heating: 0,3 – 0,5

Radiator heating: 0,5 – 1,0

Air heating: 0,5 – 1,0

Room temperature change

If you would like to decrease or increase the room temperature
either temporarily or permanently, do this by changing the Com-
fort set point.

NOTE! Floor heating or radiator heating thermostats may limit
the room temperature rise, so that they must also be adjusted
higher.

Readjusting the default settings

If the desired room temperature is not obtained, it is necessary to
re-adjust.

Cold weather:

- If the room temperature is too low, increase the heating
curve slope value.

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- If the room temperature is too high, decrease the heat-
ing curve slope value.

Warm weather:

- If the room temperature is too low, turn the roller to
Comfort set point, heating clockwise 0.5°C, and press
the OK button.

- If the room temperature is too high, turn the roller to
Comfort set point, heating counter-clockwise to 0.5°C,
and press the OK button.

NOTE! Wait one day between settings so that temperatures have
time to settle down.

11.6 Selecting heating mode

The heat pump can be used with different operating modes. The
difference between the operating modes are the temperatures.
The operating mode is changed in the Operating mode menu

Automatic operation

In automatic operation the room temperature is adjusted accord­ing to a time program. Automatic operation’s features:

 Heating mode according to time program.
 Temperature set points according to the heating mode

type "comfort set point" or "reduced set point".

 Protection operations are always active
 Automatic summer/winter mode switch connection

activate.

Continuous comfort or reduced operation

In continuous operation, the temperature is continuously kept at
a selected level.

Features of continuous operation:

 Heating mode without time program
 Protection operations active
 Automatic summer/winter mode switch connection is

out of use.

Protection operation

In protection operation the heating system is turned off. Its frost
protection is, however, active (frost protection temperature),
provided that the voltage supply is not cut off.

Features of protection operation:

 Heating areas off
 Temperature according to frost protection tempera-

ture

 Protection operations active

Summer/winter mode switch automation is active.

11.7 Domestic hot water settings

The heat pump produces domestic hot water with the change­over valve. The change-over valve turns the water flow to the
domestic hot water reservoir, in which case heat is not charged
to the property.

The domestic hot water reservoir’s water temperature varies be­tween the set points (nominal set point – switching differential
5°C).

The domestic hot water temperature is set in the menu:

Factory setting: 55°C

The domestic hot water heating can be switched on and off by
pressing the Operation mode Off

When the domestic hot water’s charging operation is active (Op­eration mode On), the domestic hot water is heated according to
the selected set point. When the charging operation is switched
off (Operation mode Off), the domestic hot water’s charging is
not on.

The manual charging of domestic hot water can be activated by
setting the Temporary setting on the user terminal or room unit
to “Recharge”. This operation activates charging and charges the
domestic hot water to the set point.

11.8 Heat pump’s Reset function

The heat pump’s active failure messages from the Regional set­tings menu. The preset activation delay is not taken into consid-

eration, so undesired delays are avoided during commissioning
and troubleshooting.

32 Gebwell GEMINI

This operation should not be used during normal use. Refer to
the maintenance instructions in the troubleshooting table before
resetting the device, and record the alarm to the maintenance rec­ord.

12 SITE-SPECIFIC DEFINI-

TION

12.1 Time and date

The controller features a year clock that indicates the time, week­day and date. The time and date must be set correctly for the
heating programme to function properly.

The time is set in Regional settings 1/3 –menu

12.2 Summer/winter switch connection

The dates set for moving to summer and winter time ensure that
on the first Sunday after such date, the time is automatically
changed from 02:00 (winter time) to 03:00 (summer time) or
from 03:00 (summer time) to 02:00 (winter time).

12.3 Language selection

There are several language options for the user terminal. You
can change the language in Regional settings 3/3 –menu.

12.4 Time programs

Various time programs are available for the heating circuits and
domestic hot water production. They are enabled in the “Auto-
matic” mode and control the switching between the temperature
levels (and the related set points) according to the set activation
times.

Factory settings: 06:00 – 22:00 comfort operation

22:00 – 06:00 reduced operation

12.5 Heating area (Heating circuit)

The site-specific definition of heating areas is done in Expert
level. A site-specific definition must be made for each area. The
heating areas to be used must be switched on at the user terminal
in the parameter list menu. When they have been switched on
the output water sensor’s (B1/B12/B14) connection to the con­troller activates the heating circuit. Heating circuit 1 has been
pre-activated at the factory.

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ACTIVATION OF HEATING CIRCUITS

The heating circuit must be activated in the configuration menu.
Set the chosen circuit to ON mode and install the output water
sensor, which will activate your selection.

Menu: Expert → Parameter list

Configuration → 1/43 → 5710 Heating circuit 1

Configuration → 2/43 → 5715 Heating circuit 2

Configuration → 3/43 → 5721 Heating circuit 3

The heating areas must be marked with stickers in order to facil­itate the definition of areas and possible maintenance work.

Site-specific definition is carried on in the menu Parameter list
→ Heating circuit 1 / Heating circuit 2 / Heating circuit 3

DEFINITION OF THE HEATING CURVE

The heating curve’s starting point is the controller’s damped out­door temperature measurement (15h average temperature) and

the heating system’s measured output water temperature. The
automation’s curve slope is seen at the intersection of these two
values. This is defined for each heating area separately.

The greater the slope of the heating curve, the more the output
water temperature changes as the outdoor temperature drops. In
other words, if the room temperature is incorrect at low outdoor
temperatures, but correct at higher temperatures, the inclination
must be changed.

Menu: Expert → Parameter list

Heating circuit 1 → 2/13 → 720

Heating circuit 2 → 2/13 → 1020

Heating circuit 3 → 2/13 → 1320

Factory setting: 0,5

SUMMER / WINTER HEATING LIMIT

The summer/winter heating limit activates or deactivates the
heating according to annual temperature differences. In Auto-
matic operation, this switch is performed automatically without
the user having the turn the heating on or off. The annual periods
can be shortened or lengthened by changing the set values.

 The display shows “Savings”
 In order to take in to account the building’s heat

insulation capacity, the damped outdoor
temperature is used

Menu: Expert → Parameter list

Heating circuit 1 → 3/13 → 730

Heating circuit 2 → 3/13 → 1030

Heating circuit 3 → 3/13 → 1330

NOTE! In case there are heating areas that one wishes not

to deactivate during summers (damp
spaces), the heating limit of that particular
circuit is to be set not in use (---).

Summer/winter heating limit follows the “damped outdoor

temperature”. Damped outdoor
temperature is average temperature of 15
hours.

SETTING THE OUTPUT WATER TEMPERA­TURE LIMITS

This setting defines the limit values for the output water temper­ature set point range. If the output water temperature set point
requested by the heating circuit reaches the corresponding limit
value, the set point remains at the maximum or minimum limit
as the heat demand increases or decreases.

If the building features underfloor heating, it is important to set
the maximum and minimum temperatures for the output line. If
the building has underfloor heating and a parquet floor, the out­put water temperature must not exceed the floor manufacturer’s
recommendations.

Menu: Expert→ Parameter list

34 Gebwell GEMINI

Heating circuit 1 → 4/13 → 740 (min), 741 (max)

Heating circuit 2 → 4/13 → 1040 / 1041

Heating circuit 3 → 4/13 → 1340 / 1341

Heating system, output water minimum temperature:

Adjustment range: 8-45°C

Factory setting: 12°C

Heating system, output water maximum temperature

Adjustment range: 12-95°C

Factory setting: 45°C

Separate minimum and maximum set points must be determined
for each heating circuit.

NOTE! When using a pump mixing circuit (not mixing valve),
the maximum set point is to be set in menu Parameter list →
Heating pump → 11/23 → 2855 “Maximum switch-of-temper­ature heating”. As flow sensor B21 measurement reaches the
value set on 2855, the compressor comes to a halt.

NOTE! The minimum set point for the output water can be in­creased if the building’s underfloor heating is intended to be on
in summertime. For this feature, you must take the “Sum­mer/winter heating limit” into account.

12.6 Domestic hot water

The site-specific definition of domestic hot water is done in Ex­pert level.

The heat pump charges domestic hot water according to the fixed
temperature limit.

You can affect the domestic hot water operation with the follow­ing settings.

DOMESTIC HOT WATER SET POINTS

Domestic hot water is adjusted according to various set points.
These set points are activated according to the selected mode of
operation, and result in the desired temperature in the domestic
hot water reservoir.

Factory settings:

Nominal set point 55°C

Reduced set point 45°C

DOMESTIC HOT WATER RELEASE

The release amount determines when the domestic hot water
charging takes place.

Menu: Expert → Parameter list

Domestic hot water → 2/6 → 1620

Factory setting: 24h/day

24h/day

The domestic hot water temperature is adjusted independently of
time programs, all the time, according to the domestic hot water
temperature’s nominal set point.

Time program 4 / domestic hot water

The controller’s time program 4 is complied with in the heating
of domestic hot water. In this case, switch connections are made
during the set operation times between the nominal set point and
the reduced set point.

DOMESTIC HOT WATER’S LEGIONELLA
FUNCTION

The controller has an elaborately adjustable legionella function,
which prevents the growth of legionella in the reservoir. The
function can be programmed on in the domestic hot water menu.
All the legionella definitions are made in Expert level.

Menu: Expert → Parameter list

Domestic hot water → 2/6 → 1640 (On / Stop)

Factory setting: Off

Legionella function set point (1645)
Factory setting: 55°C

Legionella function circulation pump (1647)

If a DHW circulation pump is connected it can be activated dur­ing the period of time the legionella function is performed.

Factory setting: OFF

SWITCHING DIFFERENTIAL OF DOMESTIC
HOT WATER CHARGING

Domestic hot water is produced to the reservoir with the heat
pump with the change-over valve. When charging the domestic
hot water, the size of the reservoir and the power of the heat
pump is significant when the compressor is activated. The com­pressor should run as long period as possible to ensure long ser­vice life. With the switching differential of activation, you can
affect the running times of the compressor during domestic hot
water charging. Note that by increasing the set point, the amount
of domestic hot water to be consumed is reduced. This affects
the sufficiency of domestic hot water in connection with con­sumption.

Menu: Expert → Parameter list

Domestic hot water reservoir → 3/11 → 5024

Factory setting: 5°C

v1-6 29082018 35

If the domestic hot water temperature is lower than the current
set point by the switching differential set here, the domestic hot
water charging will be activated.

The domestic hot water charging shall end, when the tempera­ture reaches the set point.

Example: The domestic hot water’s charging is activated when
the domestic hot water’s measurement sensor BR is under the
nominal set point (1610) 55°C – switching differential (5024)
5°C.

 By increasing the Switching differential set point, the

compressor runs for a longer time to prepare the do­mestic hot water.

 By reducing the set point, the compressor runs for a

shorter time

12.7 Domestic hot water circulation pump

A time program can be defined for DHW circulation pump or
the pump can follow the time program 4 set on domestic hot wa­ter. If you want to use these functions, the circulation pump is to
be connected to the control automation.

RELEASING THE HOT WATER CIRCULATION
PUMP

With this setting you can define the function of hot water circu­lation pump

Menu: Expert → Parameter list

Domestic hot water → 5/6 → 1660

Factory setting: DHW release

Domestic hot water release

The circulation pump runs when DHW heating is released.

Time program 4 / DHW

The circulation pump follows the time program 4. In this case,
the circulation pump is switched on (ON) when time program is
released and off (OFF) when the time program is not released.

12.8 Cooling circuit

Use of the cooling circuit requires the Control extension for
cooling circuit (JPLPO1A) extension module sold as an acces-

sory. The heat pump can control three cooling circuits.

The site-specific definition of cooling circuits is done in Expert-
level. A circuit-specific definition must be made for each circuit.
The cooling circuits coming into use must be switched on the
Configuration -menu of the controller. When the switch is com­plete, the connection of the flow sensor to the controller will ac­tivate the cooling circuit.

When the cooling operation is released, a bar will appear under
the symbol on the display. The cooling operation is selected by

pressing the cooling operation button. The cooling operation is
not active, when the heating operation’s bar is not visible.

Features of cooling operation:

 Cooling operation according to time program
 Temperature set point according to "Comf. Set

point, cooling” setting

 Protection operations active
 Cooling limit according to outdoor temperature

COMMISSIONING OF COOLING CIRCUITS

The commissioning of the cooling circuits must be carried out at
the Expert –level in Configuration –menu. Set the circuit to “4­pipe system cooling” mode and install the output water sensor,
which will activate your selection.

Menu: Expert → Parameter list

Configuration → 2/43 → 5711 Cooling circuit 1

Configuration → 3/43 → 5716 Cooling circuit 2

Configuration → 4/43 → 5722 Cooling circuit 3

OPERATING MODE

Menu: Expert → Parameter list

Cooling circuit 1 → 1/11 → 901

Cooling circuit 2 → 1/11 → 1201

Factory setting: Automatic

The operating mode can be determined with the operating mode
button on the room unit, or via the control row mentioned above.

OFF:

The cooling function is off.

Automatic:

In automatic mode the room temperature is adjusted according
to time program between Comfort and Reduced set points.

SET POINTS

Set the set points in the Cooling circuit menu. When the cooling
operation is in use with Automatic mode, the control uses the

Comfort and Reduced set points.

Menu: Expert → Parameter list

Cooling circuit 1 → 1/11 → 902

Cooling circuit 1 → 1/11 → 1202

36 Gebwell GEMINI

Comfort operation set point

During cooling operation, the room temperature is adjusted in
accordance with the comfort operation set point specified here.
The comfort set point for cooling can also be changed using the
knob on the room unit.

Factory setting: 23°C

Reduced set point

The room temperature is controlled during cooling mode
according to the recuced setpoint defined here.

Factory setting: 25°C

COOLING NOMINAL CURVE

The controller utilises outdoor temperature value to define the
output water set point required for cooling curve. The cooling
curve is determined by specifying two fixed points (output set
point at the temperatures of 25°C and 35°C).

Output water set point in outdoor temperature +25°C:

Menu: Expert → Parameter list

Cooling circuit 1 → 2/11 → 908

Cooling circuit 2 → 2/11 → 1208

Output water set point in outdoor temperature +35°C:

Menu: Expert → Parameter list

Cooling circuit 1 → 3/11 → 909

Cooling circuit 2 → 3/11 → 1209

Output water set point/ET 25

Ԩ

This defines the output water temperature required for cooling at
a mixed outdoor temperature of 25°C without taking summer
compensation into account.

Factory setting: 21°C

Output water set point/ET 35

Ԩ

This defines the output water temperature required for cooling at
a mixed outdoor temperature of 35°C without taking summer
compensation into account.

Factory setting: 18°C

TVKw Output water set point for cooling

TAgem Mixed outdoor temperature

The set cooling curve is based on the room temperature set point
of 25°C. If the room temperature set point is changed, the cool­ing curve is changed automatically according to the new value.

Cooling limit at ET:

If the mixed outdoor temperature is above the cooling limit, the
cooling is released. If the mixed outdoor temperature is at least

0.5K below the cooling limit, cooling is prevented.

Factory setting: 20°C

Menu: Expert → Parameter list

Cooling circuit 1 → 3/11 → 912

Cooling circuit 2 → 3/11 → 1212

Heating / cooling lock time:

The lock time between heating and cooling operation. When
summer heating operation is engaged, cooling is disabled during
the reference value set here.

Factory setting: 24h

Menu: Expert → Parameter list

Cooling circuit 1 → 3/11 → 913

Cooling circuit 2 → 3/11 → 1213

OUTPUT WATER SET POINT LIMITS

A lower limit can be determined for the output water temperature
used for cooling. The limit curve can be defined by setting two
fixed points. In addition, a lower limit of 5°C is set for the re­sulting output water set point.

Output water min set point/ET 25 °C

This setting defines the lowest permissible output water temper­ature at a mixed outdoor temperature of 25°C.

Factory setting: 18°C

Menu: Expert → Parameter list

Cooling circuit 1 → 5/11 → 923

v1-6 29082018 37

Cooling circuit 2 → 5/11 → 1223

Output water min set point/ET 35 °C

This setting defines the lowest permissible output water temper­ature at a mixed outdoor temperature of 35°C.

If an acceptable outdoor temperature value is not available, the
controller will use the setting of parameter “Output water min
set point/ET 35°C”.

Factory setting: 18°C

Menu: Expert → Parameter list

Cooling circuit 1 → 5/11 → 924

Cooling circuit 2 → 5/11 → 1224

ROOM SENSOR EFFECT

If a room temperature sensor is used in the system, the controller
can be defined a room compensation effect.

Room effect:

The more the room temperature is wished to effect the cooling’s
output water temperature, the higher the set point is determined.

Adjustment range: 0 – 100%

Factory setting: 80%

Menu: Expert → Parameter list

Cooling circuit 1 → 6/11 → 928

Cooling circuit 2 → 6/11 → 1228

12.9 Heat pump settings

CHARGING PUMP’S SPEED LIMITS

The heat pump’s charging pump (Q9 / LP) is speed controlled.
When the compressor is running, the pump operates between the
minimum and maximum rotation figures, keeping the charging
temperature difference at the set point. This function enables the
heat pump to work at the best possible efficiency.

The pump also rotates when the compressor is off, in this case
the controller drives the pump at the minimum rotation speed.
When setting the pump’s rotation speed, the heat pump’s model­specific minimum flow must be taken into account. The charging
flow must not be lower than the heat pump’s minimum flow.
This may cause functional failures in the device. Refer to section

Technical specifications for model-specific minimum flows.

Menu: Expert → Parameter list

Heat pump → 3/23 → 2792 minimum rotation figure

Heat pump → 3/23 → 2793 maximum rotation figure

Pump’s minimum rotation figure, 2792:

Permitted adjustment range: 40-70%

Factory setting: 50%

Pump’s maximum rotation figure, 2793:

Permitted adjustment range: 70-100%

Factory setting: 100%

NOTE! When reducing the maximum rotation figure, use a flow
meter to check the minimum flow at the charging line control
valve.

RETURN WATER SWITCHING DIFFERENTIAL

With this set point the values of the heat pump start-up limits are
defined in return water controlled system. By return water con­trolled system is meant a facility where there are no heating res­ervoir measurements. This setting does not affect systems, which
have heating reservoir measurements.

The compressor switches on and off according to the return wa­ter temperature (B71) and the return water temperature switch­ing differential.

 By increasing the set point, the compressor runs for a

longer operating period in heating mode.

 By lowering the set point, the compressor runs for a

shorter operating period in heating mode.

Menu: Expert → Parameter list

Heat pump → 9/23 → 2840 Return water temp. connection dif­ference

Adjustment range: 1°C - 20°C

Factory setting: 6°C

2840 Return temperature switching difference

OFF Switching off point

ON Switching on point

38 Gebwell GEMINI

TRLw Return water temperature set point

K Compressor

Once the return water temperature rises above set point by a half
of switching differential, the compressor comes to a halt. Once
the return water temperature drops below the set point by a half
of switching differential, the controller will turn on the compres­sor.

If return water temperature drops below 30°C, the switching dif­ferential is reduced so that switching on point comes closer to
set point. Return water set point being 20°C the switching on
point is the same as return water set point.

2840 Return temperature switching difference

TRLw Return water temperature set point

T Heat pump return water temperature

OFF Switching off point

ON Switching on point

Ta Outdoor temperature

12.10 Programming the reservoir’s resistors
and output water’s electrical heaters

The heating system’s resistors can be controlled with the heat
pump’s controller. The resistors’ functions have several different
operations. When programming, you must know the resistors’
intended operation. Should the resistors function only in failure
situations, in connection with the use of the compressor for pro­ducing domestic hot water and heating, in the legionella func­tion, in connection with charging or in connection with heating.
As a factory setting , the resistor s hav e bee n programmed to func­tion in failure situations, not together with the compressor. If the
resistor is programmed to work simultaneously with the com­pressor (in addition), the property’s power sufficiency must be
ensured.

The controller has three relay controls for managing the resis­tors. The relay controls must be programmed to correspond to
the connection. If the relay input is not connected to a control,
the control row must be programmed to “None”.

Output water’s electrical heater K25 (relay input QX1)

Menu: Expert → Parameter list

Configuration → 11/43 → 5890

Output water’s electrical heater K26 (relay input QX2)

Menu: Expert → Parameter list

Configuration → 11/43 → 5891

Domestic hot water’s electrical heater K6 (relay input QX3)

Menu: Expert → Parameter list

Configuration → 12/43 → 5892

RESISTOR CONTROL, K25/K26 OPERATION

Resistor control (K25/K26) functions according to the factory
setting Replacement function. In this case the resistor does not
activate simultaneously with the compressor. The operation can
be changed in the user terminal’s menu. The change is made in

Expert level.

Use electric output water

Menu: Expert → Parameter list

Heat pump → 13/23 → 2880

Factory setting: Replacement

Replacement: The electric heater control is only used in failure
situations.

Heat pump full operation: The electric heater control is used
to supplement the compressor in heating use.

DHW full operation: The electric heater control is used to sup­plement the compressor is DHW use. In heating use, the resistor
functions according to the Replacement operation.

Heating and DHW operation.: The electric heater control is
used to supplement the compressor in both heating and DHW
use

Legionella function: The electric heater functions as in the Re­placement operation, in addition wo which the control is active
in legionella use.

NOTE! In connection with activating the legionella function, it
must be considered whether the output water heater can imple­ment the heating of DHW hydraulically. If the output water heat­ers are connected to the heating line, the heating must be done
with a K6 resistor.

Electric output water prevention time

The electric heater control is allowed to start no earlier than the
prevention time set with this parameter has elapsed from the ac­tivation of the compressor (K1).

The prevention time is taken into consideration only when the
control is used to supplement the compressor use. If the electrical
heating’s setting is “Replacement”, the prevention time is not
taken into account.

Menu: Expert → Parameter list

v1-6 29082018 39

Heat pump → 13/23 → 2881

Adjustment range: 0 - 255min

Factory setting: 30min

Electric output water release integral

When a two- or three-phase flow-through resistor is used, the
phases are released in accordance with the release and return in­tegral (2882 and 2883).

Menu: Expert → Parameter list

Heat pump → 13/23 → 2882

Adjustment range: 0 - 500°Cmin

Factory setting: 250°Cmin

Electric output water return integral

If the actual value is higher than the activation point, the control­ler switches the most recently activated (controlling) step off and
begins to form a release integral based on the potential heat ex­cess.
Then, once the heat excess reaches the set release integral
(2883), the lower step is switched off.
For a new release, the release integral must be met again.

Menu: Expert → Parameter list

Heat pump → 14/23 → 2883

Adjustment range: 0 - 500°Cmin

Factory setting: 20°Cmin

Electric output water below ET

This setting is taken into account only when the resistor control
is used to supplement the compressor use (2880). At the "Re­placement" setting, the electric heater is always released.

The electric heater is only released when the damped outdoor
temperature is below the temperature set here.

Menu: Expert → Parameter list

Heat pump → 14/23 → 2884

Adjustment range: (---)** -30 - +30°C

Factory setting: --­**No release temperature defined

ELECTRIC HEATER CONTROL, K6 (DHW) OP­ERATION

NOTE! ALL ELECTRIC HEATERS MUST BE EQUIPPED
WITH THERMOSTATS!

The electric heater control K6 functions according to the factory
setting Replacement function. In this case the resistor does not
activate simultaneously with the compressor. The operation can

be changed in the user terminal’s menu. The change is made in

Expert level.

Menu: Expert → Parameter list

DHW reservoir → 5/11 → 5060

Factory setting: Replacement

Replacement: The electric heater control ensures the charging
of domestic hot water, if the heat pump fails.

Summer: When all the heating circuits have switched to sum­mer mode, the electric heater control ensures the charging of do­mestic hot water from the following day.
In heating use, the resistor functions according to the Replace-
ment operation.

Always: Domestic hot water is always charged with the electric
heater.

Cooling operation: When the heat pump is in cooling operation,
the domestic hot water is charged with the electric heater.
In heating use, the resistor functions according to the Replace-
ment operation.

Legionella function: If the legionella function is programmed
to the heat pump, the operation is carried out with the K6 electric
heater control.

SETTING THE ELECTRIC HEATERS’ THERMO­STATS

The electric heaters installed in the reservoir must always be
equipped with thermostats. The resistor’s thermostats must be
set to such a high set point, so that the heat pump can finish the
charging. In the heating reservoir, the thermostat’s set point must
be set according to the highest heating circuit.

Example, domestic hot water:

Domestic hot water set point defined to the heat pump +55°C.
The thermostat must be set to +65°C.

This ensures that the heat pump can charge the domestic hot wa­ter to the nominal set point.

Example, radiator heating:

The output water maximum set point defined for the radiator
heating circuit is +60°C. The thermostat must be set to +70°C.

Example, floor heating:

The output water maximum set point defined for the floor heat­ing circuit is +40°C. The thermostat must be set to +45°C.

12.11 Control of additional heat source

Additional heat sources can be commissioned at the Expertlevel.
Select the settings in accordance with the instructions below; af­ter this, select the device-specific settings.

40 Gebwell GEMINI

Menu: Expert → Parameter list → Configuration

Configuration:

- 5894 Triac output ZX4 >> Heat request K27

- 6070 Output UX1 operation >> Power request

When control of additional heat sources has been selected for the
heat pump, device-specific settings should be selected in the Ad­ditional source menu.

Menu: Expert → Parameter list → Additional source

Increasing set point main source (3690): When the additional
heat source is released, the heat pump’s set point is increased by
the set value.

Adjustment range: 0°C - 10°C

Factory setting: 0°C

Main producer’s power limit: Setting is not in use.

In DHW charging (3692): The additional heat source’s opera­tion in the production of domestic hot water.

NOTE! Before changing the setting, it must be ensured that
charging hydraulically is possible.

Factory setting: Depending on the plant diagram

Outdoor temperature limit DHW charging (3694): If the ad­ditional heat source is locked to the production of domestic hot
water, this parameter can be used to bypass the mode according
to the outdoor temperature limit.

Factory setting: Notice
Release below outdoor temperature (3700): The additional

heat source is only released when the damped outdoor tempera­ture is below the temperature set here.

Factory setting: ---

Release above the outdoor temperature (3701): The addi­tional heat source is only released when the damped outdoor
temperature is above the temperature set here.

Factory setting: ---

After-run (3705): The setting defines how long K27 control is
kept running, when the B10 measurement achieves the set point.

Factory setting: 5min

Connection integral (3720): When relay control K32 is used for
the control of temperature, the relay is released and returned ac­cording to the set integral value.

Factory setting: 50°Cmin

TVxSch Common output water temperature (B10)

TVwSch Common output water set point

+Int Return integral (3720)

-Int Release integral (3720)

t1 / t2 After-run time

K27 Release of additional source K27

K32 Adjustment K32

Switching difference Off (3722): If the common output water
temperature exceeds the switching difference set here, the addi­tional heat source is turned off immediately, regardless of other
factors.

Factory setting: 5°C

Prevention time (3723): When the common output water tem­perature is below the set point, the controller calculates a pre­vention time, after which activates the additional heat source
control.

Factory setting: 30min

12.12 Control of solid fuel burner

A fixed fuel burner refers to a heating device that operates in
connection with the heat pump system, and the production of
heat is not controlled, such as, for example, a wood burner or
fireplace. The heat pump requires an extension module Control
extension for solid fuel burner (KPAKO1A). The module in­cludes the control extension, burner measurement sensor (B22)
and a reservoir measurement sensor (B4). Burner control has
been pre-programmed at the factory. The site-specific definition
must be made in connection with commissioning.

Prevents other heat sources (4102): When the fixed fuel burner
heats up, the heat pump is locked. Locking occurs as soon as the
rise in the burner’s temperature is noted.

Factory setting: On

Minimum set point (4110): The burner’s charging pump (Q10)
is activated when the measurement sensor B22 reaches the min­imum set point. The temperature must, however, be higher than
the temperature of the reservoir.

Factory setting: 35°C

12.13 Call for heating (VAK control)

The heat pump can be controlled with a higher level automation
system, with the Call for heating control message. The control

v1-6 29082018 41

message (0-10V) is provided to the heat pump’s Hx switch,
which must be programmed as active in the Configuration menu.
When the heat pump is controlled with a 0-10V Call for heating
control, all the secondary network’s settings and controls must
be in the control of the building automation system.

0V = 0°C

10V = 60°C**

** 10V value can be changed on control row 5956

Consumer call VK2 10V: The heat pump receives a call for
heating, which the device produces to the heating network ac­cording to the output water sensor’s B10 measurement.

NOTE! When controlling the heat pump with an external call
for heating message, the control of the heating circuits must be
implemented with building automation. The heating circuits
must be placed into OFF mode from the heat pump when using
the message. Refer to section Commissioning heating circuits for
the heating circuits’ settings.

12.14 ModBus communication

ModBus communication connection (MODBUS350) enables
the device’s temperatures, status data, set points and failures to
be read with a higher level automation system. With the ModBus
350 connection, the heat pump can be set a set point as a temper­ature, according to which the heat pump produces heat to the
reservoir or heating network. The ModBus 350 communication
connection is delivered with separate instructions for installation
and programming.

13 SYSTEM INFO

The heat pump operating status can be seen from the operating
terminal. On the basic view of the operating terminal displays
the Heat pump status. If the heat pump is connected to the room
sensor, the operating terminal displays the current indoor tem­perature. All the status information displaying on the display are
not alerts. You can browse heat pump status information and his­torical data at the Expert level in Mode or Info –menu.

13.1 Special situations

In exceptional situation, the display of the basic unit shows one
of the following symbols.

Failure notifications

If this symbol appears on the display, the device is suffering from
a failure. Refer to the info page for the failure notice.

Maintenance or deviating behaviour

If this symbol appears on the display, the device has issued a
maintenance notification or is operating in an abnormal way.

Refer to the info page for the failure notice and read more.

13.2 Heat pump status

The heat pump status will tell the current operation status of the
heat pump.

HEAT PUMP STATUS:

OFF: The heat pump is turned on, but the call for heating is not
active

STOP: The heat pump is turned on, but the call for heating is not
active. A newer language version.

HEATING: The call for heating is active and the compressor is
on. Compressor is heating the property or hot water.

LIMITATION OF ACTIVE TIME: Call for heating is on, but
the compressor minimum idle time prevents the compressor
from starting. The compressor starts after the minimum idle time
has expired.

EMERGENCY OPERATION: The heat pump has gone to emer­gency operation operating mode due to malfunction or the heat
pump has been set to emergency operation operating mode. The
heat pump heats the property with the electric heaters. The oper­ating terminal displays alarm clock symbol.

OFF THE MAXIMUM LIMIT: Call for heating is active, but the
compressor charging is interrupted as the output water has
reached the maximum set point limit. The charging process starts
again after the minimum idle time.

COMPRESSOR LOCKED: The compressor is locked due to too
high or too low temperature of the collector or charging circuit.
The compressor will return to normal mode once the tempera­tures return to the correct temperature range.

42 Gebwell GEMINI

PASSIVE COOLING USE: The heat pump is switched to cool­ing mode. Source pump is running. The compressor is not used
for passive cooling.

13.3 Heating circuits’ status information

Heating circuit status indicates the current status of the heating
circuit operation.

COMFORT HEATING: The heating circuit operates according
to Comfort set point.

REDUCED HEATING: The heating circuit operates according
to reduced set point.

PROTECTIVE USE: The heating circuit operates according to
Protective set point.

HEATING LIMITED USE: The heating circuit is limited during
hot water charging. Heating circuit returns to the set heating op­eration mode after the domestic hot water charging is complete.

SUMMER USE: The heating circuit is switched off due to sum­mer operation mode. Heating circuit returns to the set heating
mode as the damped outdoor temperature drops below the sum­mer / winter heating limit.

OFF: The heating circuit is turned off.

13.4 Domestic hot water status information

CHARGED: Hot water is charged to nominal value.

CONSUMPTION: Hot water function is active. An electric con­trol valve is connected to hot domestic hot water or the hot do­mestic hot water is produced in a heat exchanger.

CHARGING ACTIVE: The heat pump produces hot water.

ELECTRIC HEATER CHARGING: Hot domestic hot water
charging is active with the help of electric heater.

13.5 Measurements

To access the comprehensive measurement menus, log into the
controller at the Expert level. The source menu allows you to
read the following status and temperature information.

NOTE! Not all measurements are shown in all applications.
Some of the measurements will require additional equipment.

Row num­ber

Control row Unit/status

8006 State heat pump On/Off

8400 Compressor 1 On/Off

8402 El imm heater 1 flow On/Off *

8403 El imm heater 2 flow On/Off

8456

Hours run el flow

Reset

h

8457

Start counter el flow

Reset

pcs

8404 Source pump On/Off

8405 Source pump revolutions %

8406 Condenser pump On/Off

8407 Speed condenser pump %

8460 Heat pump throughput l/min

8410 Heat pump return temp °C

8411 Setpoint HP °C

8412 Flow temp HP °C

8415 Hot gas temperature °C

8425

Condenser temperature differ­ence

°C

8426 Temp diff evaporator °C

8427 Source inlet temp °C

8428 Source inlet temp min °C

8429 source outlet temp °C

8430 Source outlet temp min °C

8440 Port 1 min idle time remaining min

8442 Remain stage 1 on time min min

8450 Hours run compressor 1 h

v1-6 29082018 43

Row num­ber

Control row Unit/status

8451

Compressor 1 start-up coun­ter

pcs

3110 Heat delivered kWh

3113 Energy brought in kWh

3116 Performance factor

8395 Generated thermal power kW

8397 Energy consumption kW

8398 Power ratio

While at the Expert level, you can read the following information
in the Consumer menu:

To activate the header row, press the button (dark background)
and select the desired measurement.

Row num­ber

Control row Unit/status

8700 Outside temp °C

8701 Outside temp min °C

8702 Outside temp max °C

8703

Outside temp attenuated (6h
average temperature)

°C

8704 Outside temp composite °C

8730–8735 Actuators of heating circuit 1 *

8740 Room temp 1 °C

8740 Room setpoint 1 °C

Row num­ber

Control row Unit/status

8743 Flow temp 1 --- **

8743 Flow temp setpoint 1 °C

8770 Room temp 2 °C

8770 Room setpoint 2 °C

8773 Flow temp 2 °C

8773 Flow temp setpoint 2 °C

8827

Instantaneous water heater’s
pump (Q34) revolutions

%

8830 DHW temp 1 (B3) °C

8832 DHW temp 2 (B31) --- *

8840 Hours run DHW pump h

8841 DHW pump start-up counter pcs

8852

DHW consumption temp
(B38)

°C

8853

DHW temp setpoint for instan­taneous water heater

°C

8950 Common flow temp (B10) °C

8951 Common flow temp setpoint °C

44 Gebwell GEMINI

14 FAILURES

In most cases, the controller detects a malfunction of the heating
system and indicates this with a failure notification appearing on
the display. When failure notification displays on the display,
record the alert exactly to the service book to facilitate the
maintenance operations.

14.1 Alerts

When the alert is active, the symbol appears on the heat
pump's display.

More information about the alert can be found on the info page.
Always try first to find out for yourself the malfunction with the
help of the trouble shooting table. If you cannot detect the mal­function, contact a qualified technician.

14.2 Troubleshooting

If failures are not displayed on the screen, follow the instructions
below.

Basic measures:

1. Check all switches

2. Inspect the house as well as the heat pump fuses

3. Check the fault current circuit breaker

Room temperature too low:

15. Heat pump in incorrect operating mode

16. Set the heat pump heating functions into the right
mode.

17. Thermostats of radiators / floor heating are switched
off

18. Turn on the thermostats in so many rooms as possible

19. Adjust the room temperature on the menu Heating
circuit instead of switching off the thermostats

20. The automatic set point is too low:

21. Raise the Comfort set point on the menu Heating cir-
cuit

o Increase the heating curve slope set point

on the menu Heating circuit

o Set the maximum output water set point

sufficiently high on the menu Heating cir-
cuit

 Program for heating circuit is switched on

o Go to menu Time program heating circuit

and adjust the time program to wanted level

 Air in the heating system

o Vent the heating system

 Valves closed between the accumulator and the heat-

ing circuit

o Open the valves

 External switch for the room temperature drop acti-

vated

o Check any external switches

Room temperature too high:

 Heating circuit setting values are too high

o If the room temperature is too high only in

cold weather, decrease the heating curve
slope.

o If the room temperature is too high on

warm weather, decrease comfort set point.

Domestic hot water too cold:

 Domestic hot water function is not active

o Pres the domestic hot water selection but-

ton so that a black bar appears below the
tap.

 Domestic hot water consumption is too high

o Wait until the water has warmed up. Tem-

porarily at beginning of the higher con­sumption, you can choose the forced charg­ing of domestic hot water by pressing the
terminal's domestic hot water button for 3
seconds.



Set point too low

o Go to menu Domestic hot water and in-

crease the set point for domestic hot water

 The feed mixing valve adjusted too low

o Open the valve

The compressor will not start:

 No need for heat

o Check heat pump’s status on the Menu Info

 Compressor minimum idle time is active

o Wait for 20 minutes and check if the com-

pressor will start

 Heat pump failure

o Check Info menu for the reason for the fail-

ure and make the adjustments needed ac­cording to the trouble shooting table.

v1-6 29082018 45

Soft starter failure notification

Failure in soft starter shows as Soft starter E25 failure notifica­tion on controller's display. The amount of flashes of the red
LED light on soft starter indicates the failure.

Number of
flashes, red
LED

Failure Operation

2

Incorrect
phase se­quence

Changing the phase se­quence

3

Incorrect volt­age

Automatic restart 5 min
after the failure

4

Incorrect fre­quency

Automatic restart 5 min
after the failure

5

Rotor is not
spinning

Automatic restart 5 min
after the failure

6

Start time > 1 s Automatic restart 5 min

after the failure

7 Overheating

Automatic restart 5 min
after the failure

8

Over current
after start-up

Automatic restart 5 min
after the failure

9

Asymmetrical
input voltage

Automatic restart 5 min
after the failure, if all
phases are connected

46 Gebwell GEMINI

14.3 Troubleshooting table

No: Failure message Sensor Description

Cause

Measure

Measure

10: Outdoor sensor B9 The outdoor sensor is

damaged or it is not con­nected.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

25: Fixed fuel burner sen­sor

B22 Failure in the burner’s

sensor.

Failure in the electrical
system

Contact a qualified
technician.

Check that the sensor is intact and
correctly connected. If necessary,
contact Gebwell service.

26: Common output wa­ter sensor

B10 Failure in the common

output water sensor of
charging

Failure in the electrical
system

Contact a qualified
technician.

Check that the sensor is intact and
correctly connected. If necessary,
contact Gebwell service.

30: Output water sensor 1 B1 Failure in heating circuit

1’s output water sensor

Failure in the electrical
system

Contact a qualified
technician.

Check that the sensor is intact and
correctly connected. If necessary,
contact Gebwell service.

31: Output water sensor
cooling 1

B16 The output water sensor

for cooling is damaged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

32: Output water sensor 2 B12 The mixed heating cir-

cuit sensor is damaged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

33: Heat pump output
water sensor

B21 The heat pump's flow

sensor is damaged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

35: Source input sensor B91 The inlet sensor in the

heat pump's collection
circuit is damaged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

36: Hot gas sensor 1 B81 Hot gas sensor is dam-

aged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

44: Heat pump retu rn wa­ter sensor

B71 The sensor in the heat

pump's return water is
damaged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

45: Source outlet sensor B92 The outlet sensor in the

collection loop is dam­aged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

50: Domestic hot water
sensor 1

B3 The hot water sensor is

damaged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the connecter is intact
and correctly connected. If neces­sary, contact Gebwell service.

60: Room sensor 1

The room sensor is dam­aged.

Failure in the electrical
system

Contact a qualified
technician.

Check that the room sensor is con­nected and not externally damaged.
If necessary, contact a qualified
technician.

70: Additional reser­voir’s sensor 1

B4 Failure in the heating res-

ervoir’s upper sensor

Failure in the electrical
system

Contact a qualified
technician.

Check that the sensor is intact and
correctly connected. If necessary,
contact Gebwell service.

71: Additional reser­voir’s sensor 2

B41 Failure in the heating res-

ervoir’s lower sensor

Failure in the electrical
system

Contact a qualified
technician.

Check that the sensor is intact and
correctly connected. If necessary,
contact Gebwell service.

81: LPB short circuit Cascade system’s inter-

nal bus has short-cir­cuited.

Failure in the electrical
system

Contact a qualified
technician.

Check that the bus cable is intact
and correctly connected.

82: LPB address duplica­tion

There are several heat

pumps with the same de­vice address in the cas­cade system

Failure in the control sys­tem

Contact a qualified
technician.

Check the device addresses. Master
device = 1, Device 2 = 2 etc.…
(LPB system)

v1-6 29082018 47

No: Failure message Sensor Description Cause Measure Measure

98: Extra module 1

The controller cannot de­tect the extra module 1
from the channel.

Failure in the electrical
system

Contact a qualified
technician.

Check the fastening of the flat cable
between controllers. Check that the
extra module is connected to power
supply (green light).

99: Extra module 2

The controller cannot de­tect the extra module 2
from the channel.

Failure in the electrical
system

Contact a qualified
technician.

Check the fastening of the flat cable
between controllers. Check that the
extra module is connected to power
supply (green light).

100: 2 time masters There are two time mas-

ters in the cascade sys­tem

Failure in the control sys­tem

Contact a qualified
technician.

Check in the LPB system that only
the master device has been defined
as master (LPB system)

102: Clock not running
reserve

The battery on the con­troller’s operating moni­tor is running out.

Failure in the electrical
system

Contact a qualified
technician.

Check that the flat cable is fastened
properly both to the controller and
the display.

105: Maintenance notifi­cation

A maintenance notice is
programmed on the con­troller.

Contact a qualified
technician.

Perform annual maintenance of the
equipment.

106: Source temp too low

The incoming tempera­ture from the collector is
lower than set in the
menu. The controller will
restore the situation auto­matically in 4 hours.

Too low flow in the col­lector.

Check that the shut­off valves on the col­lector are open.
Check the strainer on
the collector. If neces­sary, contact a quali­fied technician.

Check the functioning of the collec­tor.

107: Hot gas, compr. 1

Alarm goes off, when hot
gas sensor shows 130°C.
3 alarms per 8 hours are
allowed with automatic
restoring.

Contact a qualified
technician.

Check the functioning of the cool­ing unit.

127: Legionella tempera­ture

The heat pump has not
been able to maintain the
requested temperature in
the legionella function.
The controller will retry
charging after minimum
idle time.

Domestic hot water has
been used during raising
operation.

222: Heat pump pressure E10 High pressure switch has

tripped.

Too low a flow in charg­ing / heat supply circuit.
Radiator or floor heating
valves are shut off or set
too low. Air in the heating
system. The heating sys­tem pressures are too low.
A clogged strainer.

Open radiator/floor
heating thermostats.
Vent the heating net­work. Check the net­work pressure. Clean
the strainer. Check
that the charging
pump is running. If
necessary, contact a
qualified technician.

Check the functioning of the heat
supply network.

223: Heating circuit start­up pressure

E10 High pressure switch has

tripped in connection
with the start-up of heat­ing.

Too low a flow in charg­ing / heat supply circuit.
Radiator or floor heating
valves are shut off or set
too low. Air in the heating
system. The heating sys­tem pressures are too low.
A clogged strainer.

Open radiator/floor
heating thermostats.
Vent the heating net­work. Check the net­work pressure. Clean
the strainer. Check
that the charging
pump is running. If
necessary, contact a
qualified technician.

Check the functioning of the heat
supply network.

224: Hot water start-up
pressure

E10 High pressure switch has

tripped in connection
with the start-up of do­mestic hot water heating.

Too low a flow in charg­ing circuit. Air in the heat­ing system. A clogged
strainer.

Vent the heating net­work. Check the net­work pressure. Clean
the strainer. Check
that the charging
pump is running. If
necessary, contact a
qualified technician.

Check the functioning of the
change-over valves. Check the
functioning of the charging circuit.

48 Gebwell GEMINI

No: Failure message Sensor Description Cause Measure Measure

225: Under pressure E9 Under pressure switch

has tripped.

Too low a flow in collec­tor. The shut-off/balanc­ing valves in the collec­tion loop are shut off. A
clogged strainer. Too lit­tle liquid on the collection
loop. The water in the
heating system is too cold
(under 15°C)

Clean the strainer on
the collector. Add
more liquid in the col­lector if needed. If
necessary, contact a
qualified technician.

Check the functioning of the collec­tor. Check the functioning of the
source pump.

226: Compressor 1 over
load

E11 Compressor motor pro-

tection has tripped.

The compressor has
tripped the motor protec­tion.

Set compressor motor
protection (F1) on
ON-position. If nec­essary, contact a qual­ified electrician.

Check the power supply of the heat
pump. Check the functioning of the
compressor.

243: Swimming pool
sensor

B13

Failure in the electrical
system

324: BX, same sensors

The sensors with same
marking are connected to
BX entries.

Failure in the electrical
system

Contact a qualified
technician.

Change the correct sensor ad­dresses.

324: BX/extramod. same
sensors

The sensors with same
marking are connected to
BX entries.

Failure in the electrical
system

Contact a qualified
technician.

Change the correct sensor ad­dresses.

357: Cool.circuit 1 output
water temp.

The temperature of the
output water of cooling
circuit is too low.

The control valve is in
manual mode. Incorrectly
set value.

Check the minimum
temperature level of
the cooling circuit.

358: Soft starter E25 Soft starter has given an

alarm.

Heat pump motor protec­tion is turned off. The heat
pump's power supply
phases are reversed. In­stantaneous power failure.
Power supply is missing a
phase. The fuse is blown.

Check that the motor
protection is on.
Change the phase se­quence on the plug.
Check that the heat
pump’s fuses are in­tact. Contact a quali­fied technician.

v1-6 29082018 49

15 MAINTAINING AND SER-

VICING THE HEATPUMP

In order to ensure your heat pump’s long service life and unin­terrupted operation, the following inspections must be conducted
a few times a year, and more frequently during the first year.
Remember to also maintain and inspect the accessories in ac­cordance with their instructions.

15.1 Maintenance notice

Maintenance functions can be used as a method of early preven­tion on periodical control. To make it easier to remember the
equipment maintenance, the controller can be programmed to
give a maintenance notice. Maintenance notice will appear on
the display of the controller on selected intervals, disappears by
pressing the Reset button.

This operation is carried out at the "Expert " level.

1. Press the OK button to access the menu.

2. Select Service/special operations, press the OK but­ton.

3. Select control row 7070, Heat pump’s interval.

4. Scroll to the row interval in months.

5. Return to the start with the ESC button.

15.2 Inspections

Servicing must only be completed by a person with the required
competency.

The refrigerant circuit must only be maintained by an authorised
refrigerating equipment technician

General appearance and leaks

Check the interior and exterior of the heat pump for liquid leaks,
oil and other deviations from normal operation. The safety
valves expel some water due to pressure changes as part of their
normal operation.

Liquid level and strainers of the collector

Check the liquid level of the collector and add more liquid if
necessary. After commissioning, it may be necessary to add liq­uid over the course of a few days. Having to add a few litres is
normal. If the liquid level is too low, allow the pump to run nor­mally, open the admission valve and fill the tank with heat trans­fer liquid. If you need to repeatedly add liquid, contact an instal­lation or maintenance company. The liquid level in the tank
should drop slightly when the pump is activated and rise when
the pump is stopped. Diverging behaviour is a sign of air, incor­rect circulation direction or a blocked strainer.

Check and clean the collector strainer. The strainer should be
checked several times immediately after commissioning. How­ever, avoid unnecessary opening of the collector.

Checking the safety valves

Check the operation of the valves twice a year by turning the cap.
Ensure that water comes out of the overflow pipe.

15.3 Nominal curves of sensors

NTC10k (all sensors of the device, excluding the outdoor sensor)

NTC1k (outdoor sensor)

15.4 Testing inputs and outputs

Here we assist on how you can test the operations of devices
connected to the controller. The input/output test suspends all the
controller’s normal control operations. Turn off the compressor
before starting the test, by switching the F1 motor protection to
OFF position.

In order to carry out the input/output test, you must be in Expert
level.

50 Gebwell GEMINI

SOURCE PUMP TEST

Source pump test is carried out on user terminal 1 of the leading
heat pump.

1. Move to Expert level,

2. Select Input/output test

3. Select row Relay output QX5, accept with button

4. Next select Output UX 1/4 control row 7710 (Output
test UX1)

5. Set the source pump’s desired rotation speed on the
row. (50-100%)

6. Ensure the pump’s operation by feeling the pump, re­ducing the shut-off valve of the collector (pipe makes
a sound), and by checking the temperatures of the
collector. The temperatures should settle between 0­7°C.

7. End the source pump’s test by setting row 7710 --­and switch off relay test (No test).

CHARGING PUMP TEST

Each compressor module has a charging pump. Test must be car­ried out for each charging pump separately.

1. Select Input/output test in menu Output UX 2/4

2. Select control row 7716 (Output test UX2)

3. Set the charging pump’s desired rotation speed on the
row. (50-100%)

4. Ensure the pump’s operation by feeling the pump, re­ducing the shut-off valve of the charging circuit (pipe
makes a sound), and by checking the temperatures of
the charging circuit. The temperatures should have
settled at the heating network’s temperatures.

5. End the charging pump’s test by setting to control
row 7716 ---.

CHANGE-OVER VALVE TEST

Change-over valve test is carried out on user terminal 1 of the

leading heat pump.

1. Select Input/output test in menu Relay test (7700)

2. Select to row Relay output QX8, accept with button.
The change-over valve turns to the DHW charging
position A. (red triangle points to A)

3. Select to row Stop all. The change-over valve turns to
the heating charging position B. (red triangle points
to B)

4. End the test by setting to control row No test.

HEATING CIRCUIT MIXING VALVE TEST

1. Select Input/output test in menu Relay test (7700)

2. Select to row Relay output QX10, accept with button.
The mixing valve runs open.

3. Select to row Relay output QX11, accept with button.
The mixing valve runs closed.

4. End the test by setting to control row No test.

MIXING HEATING CIRCUIT PUMP TEST

1. Select Input/output test in menu Relay test (7700)

2. Select to row Relay output QX9, accept with button.
The mixing heating circuit’s pump is activated.

3. End the test by setting to control row No test.

PUMP HEATING CIRCUIT PUMP TEST

1. Select Input/output test in menu Relay test (7700)

2. Select to row Relay output QX12, accept with button.
The pump heating circuit pump is activated.

3. End the test by setting to control row No test.

HOT WATER CIRCULATING PUMP TEST

1. Select Input/output test in menu Relay test (7700)

2. Select to row Relay output QX13 accept with OK but­ton. The hot water circulating pump is activated.

3. End the test by setting to control row No test.

ELECTRIC HEATER CONTROLS TEST

1. Select Input/output test in menu Relay test (7700)

2. Select to row Relay output QX1, accept with button.
K25 resistor control is activated.

3. Select to row Relay output QX2, accept with button.
K26 resistor control is activated.

4. Select to row Relay output QX3, accept with button.
K6 domestic hot water resistor control is activated.

5. End the test by setting to control row No test.

ALARM FORWARDING TEST

1. Select Input/output test in menu Relay test (7700)

2. Select to row Relay output QX6, accept with button.
The alarm relay is activated. The K10 further alarm
relay receives control.

3. End the test by setting to control row No test.

v1-6 29082018 51

16 TECHNICAL SPECIFICATIONS

GebwellGEMINI  40 52 64

Powerinformation

0/35

Outputpower kW 45.0 61.0 69.2

Coolingpower kW 35.0 48.0 54.8

Inputpower kW 10.0 13.0 14.4

COP  4.5 4.7 4.8

0/55

Outputpower kW 40.6 54.6 61.8

Coolingpower kW 25.6 35.2 40.2

Inputpower kW 15.0 19.4 21.6

COP

 2.7 2.8 2.9

5/35

Outputpower kW 52.4 71.6 80.6

Coolingpower kW 42.2 58.2 65.8

Inputpower kW 10.2 13.4 14.8

COP  5.1 5.3 5.4

5/55

Outputpower kW 46.4 62.4 70.6

Coolingpower kW 31.4 42.8 48.8

Inputpower kW 15.0 19.6 21.8

COP  3.1 3.2 3.2

System’senergyefficiencyclass,
intermediateclimateconditions,underfloorheating

 A+++

Numberofcompressorunits  2 2 2

Electricalinformation

Ratedvoltage/electricalconnection V 400V50Hz

Recommendedfusesize A 3x40 3x50 3x63

Max.supplycurrent(incl.controlsystemsandpumps) (A

rms

) 34.5 42.0 51.4

Start‐upcurrent (A

rms

) 51.9 63.2 84.2

Chargingpumppower W 6‐175

Sourcepumppower W 17‐608 23‐762

IPclassification  IP21

52 Gebwell GEMINI

GebwellGEMINI



40 52 64

Refrigerantcircuit

Containsfluorinatedgreenhousegases

yes

Hermeticallysealed

yes

Refrigerant  R410A

GWP(GlobalWarmingPotential)  2088

Refrigerantvolumepercompressorunit kg 3.8 3.4 3.4

CO2equivalence tonCO2e 15.869 14.198 14.198

Cut‐off,overpressure bar 42.0

Difference,overpressure bar ‐8

Cut‐off,underpressure bar 3.2

Difference,underpressure bar 2

Collector

Energyclass,sourcepump



lowenergy(A)

Integratedsourcepump



No

Maximumpressure bar 4

Minimumflow l/s 1.42 2.00 2.48

Ratedflow l/s 1.66 2.36 3.00

Maxexternalpressurelossatratedflow kPa 81 70 100

Minimumbrineoutputtemperature °C ‐5

Maximumbrineoutputtemperature °C 20

Chargingcircuit

Energyclass,chargingpump



lowenergy(A)

Integratedchargingpump



Yes

Maximumpressure bar 4

Minimumflowpercompressorunit/chargingpump l/s 0.69 0.97 1.04

Ratedflowpercompressorunit/chargingpump l/s 0.97 1.21 1.45

Maxexternalpressurelossatratedflow kPa 72 50 43

Maxheatingwater’soutputtemperature °C 68

Soundpowerlevel dB(A) 42 42 43.5

Dimensionsandweights

Width mm 600

Height mm 1895

Depth** mm 875

Weight kg 400 400 400

Pipeconnections

Brine G 11/4"

Charging mm 35

Controller



GebwellAlbatros2

Compressor



Scroll

**Depthdimensiondoesnottakeintoaccountconnectionfromrear.

v1-6 29082018 53

17 CONNECTION POINTS, CONTROLLER 1:

17.1 Sensors

GEBWELL HEAT PUMP

CONTROLLER 1, UPPER COMPRESSOR UNIT

HEATING CIRCUIT 1
FLOW SENSOR

ADDITIONAL
RESERVOIR 1

(

HEATING UPPER)

COMMON OUTPUT
WATER

DOMESTIC HOT WA­TER RESERVOIR

ADDITIONAL
RESERVOIR 2

(

HEATING LOWER)

OUTDOOR TEMPER-

QAA55 ROOM SENSOR

QAA74 ROOM UNIT

WHITE
BROWN

WHITE
BROWN

WHITE
BROWN

WHITE
BROWN

WHITE
BROWN

R
Y
B

RED BLUE YELLOW

WHITE
BROWN

YELLOW
BLUE

54 Gebwell GEMINI

17.2 Controls

GEBWELL HEAT PUMP

TARIFF CONTROL, 230 VAC
EXTERNAL PREVENTION MESSAGE

ELECTRIC RESISTOR, HEATING STAGE 2
CONTROL 230 VAC

ELECTRIC RESISTOR, HEATING STAGE 1
CONTROL 230 VAC

ELECTRIC RESISTOR, DOMESTIC HOT WATER
CONTROL 230 VAC

Q4 DOMESTIC HOT WATER CIRCULATION PUMP
CONTROL 230 VAC, max. 0,7 A

Q2 PUMP FOR PUMP HEATING CIRCUIT
CONTROL 230 VAC, max. 0,7A

Y1/Y2 HEATING CIRCUIT ACTUATOR
230V 3-POINT CONTROL

Q6 PUMP FOR MIXING HEATING CIRCUIT
CONTROL 230 VAC, max. 0,7A

ALERT, 230 VAC
max. 0,7A

CONTROLLER 1, UPPER COMPRESSOR UNIT

EXTERNAL

Y/GR

Y/GR

Y/GR

Y/GR

Y/GR

BR

WH
BR
BLU

WH
BLU

Y/GR

Y/GR

v1-6 29082018 55

18 SETPOINT EXAMPLES FOR HEAT PUMP ADJUSTMENTS IN

DIFFERENT HEATING NETWORKS

Set points of the heating circuits:

*HC = Heating circuit

Domestic hot water set points:

Heat pump’s set points:

Row number Control row Factory setting Under floor

heating

Radiator heat­ing

Air heating

HC1* HC2* HC3*

700 1000 1300 Opearating mode Automatic

710 1010 1310

Comfort set point

20

712 1012 1312 Reduced set point 19

714 1014 1314 Frost protection set point 15

720 1020 1320 Heating curve slope 0,5 0,5

(0,3-0,5)

0,8

(0,5-1,2)

0,8

(0,5-1,2)

740 1040 1340 Flow temp setpoint min 12 12 12 12

741 1041 1341

Flow temp setpoint max

45 45

(35-45)

55

(45-60)

55

(45-60)

750 1050 1350 Room sensor compensation 20 %

730 1030 1330 Summer/winter heating limit 16

Row number Control row Factory setting

1600 Operating mode On

1610 Nominal set point 50°C

Row number Control row Factory

setting

Underfloor
heating

Radiator heat­ing

Air heating

2840 Return water temperature switching differen-

tial

6 6

8

(8-10)

10

56 Gebwell GEMINI

19 MAINTENANCE RECORD

Date: Measure: *Fault code: Performed by: Nature of mainte-

nance:

R= repair

M = maintenance

S = change of set­tings

*Fault code: If the device fails, enter the fault code issued by the controller in this column.

v1-6 29082018 57

20 ENERGY LABELS

Declaration of Conformity

We, Gebwell Ltd, hereby declare under our sole responsibility that the product

Aries
Qi
T2
Gemini
E-Flex
Taurus

to which this declaration relates is in conformity with the

LOW VOLTAGE DIRECTIVE 2006/95/EC
ELECTROMAGNETIC COMPATIBILITY DIRECTIVE 2004/108/EC

and the following harmonised standards and technical specications have been applied:

LVD: EN 61439-1:2011
EN 61439-2:2011
EN 61439-3:2012

EMCD: EN 61439-1 Annex J, Point J.9.4.2

HD: 60364 Low-voltage electrical installations
384 Electrical installations of buildings

Commission Delegated Regulation (EU) No 811/2013 on energy labelling

Products are provided with a marking of conformity.

Leppävirta 8.9.2015

Tuure Stenberg
Managing Director

Gebwell Ltd.

Patruunapolku 5, FI-79100 Leppävirta, FINLAND
Tel. [phone], Telefax [phone]

info@gebwell. | www.gebwell.

This document was signed electronically

Gebwell Ltd.

Patruunapolku 5

FI-79100 Leppävirta

FINLAND

Business ID: 2008956-7

Tel. [phone]

Telefax [phone]

info@gebwell.

www.gebwell.com