ECOFOREST ecoGEO C User manual

ecoGEO C
Installation and user manual

ecoGEO C Installation and User Manual (Version 1.0)
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Table of contents
1GENERAL INFORMATION............................................................................................................................................4
2SAFETY ISSUES............................................................................................................................................................5
2.1 REFRIGERANT CIRCUIT ....................................................................................................................................................5
2.2 HYDRAULIC CIRCUITS......................................................................................................................................................6
2.3 ELECTRICAL INSTALLATION...............................................................................................................................................7
3OVERVIEW OF THE HEAT PUMP .................................................................................................................................8
3.1 IDENTIFYING THE MODEL.................................................................................................................................................8
3.2 OPERATING PRINCIPLES ..................................................................................................................................................9
3.3 DIMENSIONS AND CONNECTIONS ...................................................................................................................................12
3.4 MAIN COMPONENTS....................................................................................................................................................13
3.5 ACCESS TO THE INTERIOR..............................................................................................................................................16
4USER GUIDE..............................................................................................................................................................20
4.1 DESCRIPTION OF THE FRONT PANEL .................................................................................................................................20
4.2 PROGRAMS ................................................................................................................................................................20
4.3 OPERATING SCHEMES...................................................................................................................................................21
4.4 MAIN SCREEN ............................................................................................................................................................21
4.5 USER MENU .............................................................................................................................................................22
4.6 SERVICE MENU.........................................................................................................................................................29
4.7 ALARMS MENU ........................................................................................................................................................35
5INSTALLATION ..........................................................................................................................................................36
5.1 TRANSPORT AND HANDLING ..........................................................................................................................................36
5.2 RECOMMENDATIONS FOR LOCATION ...............................................................................................................................36
5.3 SERVICE AREAS............................................................................................................................................................38
5.4 HEATING/COOLING CIRCUIT CONNECTION ........................................................................................................................39
5.5 DHW CIRCUIT CONNECTION..........................................................................................................................................41
5.6 BRINE CIRCUIT CONNECTION ..........................................................................................................................................43
5.7 ELECTRICAL INSTALLATION.............................................................................................................................................45
6START UP .................................................................................................................................................................52
6.1 FILLING THE HEATING/COOLING CIRCUIT...........................................................................................................................52
6.2 FILLING THE BUILT-IN DHW TANK COIL CIRCUIT.................................................................................................................52
6.3 FILLING THE DHW TANK...............................................................................................................................................54
6.4 CONNECTING THE BRINE CIRCUIT ....................................................................................................................................54
6.5 CONFIGURING THE SYSTEM............................................................................................................................................56
6.6 FINAL INSPECTION AND COMMISSIONING OF THE INSTALLATION............................................................................................57
7IDENTIFYING PROBLEMS AND TROUBLESHOOTING..................................................................................................59
7.1 ALARMS LISTS.............................................................................................................................................................59
7.2 COMFORT PROBLEMS ...................................................................................................................................................60

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8TECHNICAL SPECIFICATIONS .....................................................................................................................................61
8.1 TECHNICAL DATA TABLE ................................................................................................................................................61
8.2 INTERNAL DIAGRAMS OF THE HEAT PUMP .........................................................................................................................62
8.3 LOCATION OF ELECTRICAL CABINET CONNECTIONS..............................................................................................................65
8.4 WIRING DIAGRAMS ECOGEO C1....................................................................................................................................70
8.5 WIRING DIAGRAMS ECOGEO C2....................................................................................................................................75
8.6 WIRING DIAGRAMS ECOGEO C3....................................................................................................................................80
8.7 HEATING OUTPUT OF THE HEAT PUMP IN RELATION TO THE COMPRESSOR SPEED ......................................................................85
8.8 POWER CONSUMPTION OF THE HEAT PUMP IN RELATION TO THE COMPRESSOR SPEED...............................................................89
9EXAMPLES OF TYPICAL APPLICATIONS .....................................................................................................................93
9.1 DHW AND SINGLE AREA HEATING WITH ECOGEO C1.........................................................................................................94
9.2 PRODUCTION OF HOT WATER FOR THE BUFFER TANK WITH ECOGEO C1.................................................................................96
9.3 DHW AND HEATING AND FREE COOLING WITH SINGLE AREA ECOGEO C2 ..............................................................................98
9.4 PRODUCTION OF DHW, HEATING AND ACTIVE COOLING BY REVERSING CYCLE WITH ECOGEO C3..............................................100
9.5 PRODUCTION OF DHW AND HEATING/COOLING BY REVERSING CYCLE WITH ECOGEO C3 WITH SEPARATE HEATING/COOLING EMISSION
SYSTEMS 102
10 GUARANTEE ...........................................................................................................................................................104

ecoGEO C Installation and User Manual (Version 1.0)
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1General Information
Thank you for purchasing an ECOFOREST ecoGEO C heat pump.
In this manual you will find information on installing, commissioning, maintaining and troubleshooting the
equipment. You can also find useful user information, such as navigation and parameter settings using the
front panel.
To get the most benefit from your ecoGEO C heat pump, it is highly recommended you read this manual
carefully before installing and commissioning the equipment. Keep this manual handy for future reference.
This manual contains two different types of warnings –shown below– and it is important to pay particular
attention to them.
ecoGEO C heat pumps are designed for servicing heating/cooling systems and producing hot water. Any other
use of the equipment could result in personal and/or material injury or malfunction of the equipment. The
manufacturer is not liable for damage to property and/or personal injury from improper use of the equipment.
The heat pump must be installed by a qualified installer in accordance with the local laws and regulations and
in accordance with the installation instructions described in this manual.
NOTE
This indicates a situation that may damage the equipment or cause it to malfunction. It can also
serve to indicate whether or not a practice is recommended for the equipment.
DANGER!
This warns of an imminent or potential danger, which, if not avoided, can result in injury or death. It
can also serve to warn against unsafe practices.

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2Safety issues
The instructions in this section cover important safety aspects, so be sure to abide by them.
2.1 Refrigerant circuit
The refrigeration system uses R410A as the working fluid. This refrigerant is not harmful to the environment
since it contains no chlorine, and therefore does not contribute to the destruction of the ozone layer. However,
any action on the refrigerant circuit should be performed only by authorized personnel according to applicable
local regulations and the instructions provided in this manual.
DANGER!
In case of accidental refrigerant leak, never directly touch the area where the leak occurs. Serious
injury could occur by freezing.
The maximum working pressure of the refrigerant circuit is 4.2 MPa (42 bar).
Do not touch the pipes, compressor or other components of the refrigerant circuit during or
immediately after operation of the heat pump, as they may be very hot or very cold. If you touch
them you might suffer burns from heat or cold. If you must touch these components, allow
sufficient time for the temperature to stabilize and wear protective gloves to avoid injury.
DANGER!
All installation and maintenance work described in this manual should be performed by an
authorized technician. Otherwise personal and/or material injury could occur.
Improper installation or use of the equipment may cause electric shock, short circuit, leakage of the
working fluids, fire, or other damage to people and/or property. If you are unsure of installation,
maintenance or use of the equipment, contact your local dealer or a service representative for
advice.
If you are unsure about the operation of the unit or detect a malfunction, please contact your local
dealer or a service representative to resolve your concerns.
This equipment should not be handled by persons with physical, sensory or psychological
disabilities, children and people with no experience or knowledge to do so, unless under the
supervision or direction of a person responsible for their safety. Otherwise personal and/or material
injury could occur.
When performing installation operations, maintenance or commissioning of the heat pump, always
use appropriate personal protective equipment (goggles, gloves, etc..).
Keep the plastic bags included in the packaging out of reach of children. Injury from asphyxia may
occur.

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Toxicity
Under normal operating conditions, the heat pump refrigerant is not toxic. However, despite its low toxicity,
injury can occur during abnormal operation.
•In its gaseous state, the refrigerant is heavier than air, so it tends to accumulate in low areas. If the
equipment is installed in a place where refrigerant vapour may accumulate at ground level, it must
be well ventilated.
•Directly exposing the refrigerant to a flame produces toxic gas. However, this gas is detectable by
smell at concentrations well below the permitted limit. If you notice an unusual smell, evacuate
and ventilate the area to ensure complete removal of the gas.
•In case of accidental refrigerant leakage, ventilate the room immediately.
•Everyone who has come into contact with refrigerant vapour must be evacuated immediately and
breathe fresh air.
Inflammability
Normally, there is no risk of explosion or combustion of the refrigerant in the refrigerant circuit.
Repairs and scrapping
To service the refrigerant circuit, the refrigerant contained therein should not be discharged into the
atmosphere, but should be recovered and destroyed in special treatment plants designed for that purpose.
Because R410A is a refrigerant mixture, in the event of a leak, it is necessary to add additional refrigerant
liquid. Adding the refrigerant in its gaseous state alters its composition and can cause the heat pump to
malfunction.
Before scrapping the heat pump, its refrigerant must be recovered for destruction in a treatment plant,
according to current regulations.
2.2 Hydraulic circuits
However, any action on the heating/cooling, brine or DHW circuits should be performed only by authorized
personnel according to applicable local regulations and the instructions provided in this manual.
DANGER!
Do not touch the pipes, or other components of the heating, brine or DHW circuits during or
immediately after operation of the heat pump, as they may be very hot or very cold. If you touch
them you might suffer burns from heat or cold. If you must touch these components, allow
sufficient time for the temperature to stabilize and wear protective gloves to avoid injury.

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2.3 Electrical Installation
Any action on the electrical installation should be performed only by authorized personnel according to
applicable local regulations and the instructions provided in this manual.
DANGER!
Before performing any operation on the electrical panel, disconnect the power supply.
When the upper front cover of the heat pump is removed, the electric panel is exposed and the user
might accidentally touch its components. During installation and maintenance of equipment never
leave the electrical panel unattended while it is exposed.
Do not touch any component in the electrical panel with damp hands, as this may cause electric
shock.
Do not touch any electrical component of the heat pump (including pumps, valves, DHW electrical
support element, etc.) during or immediately after operation. This may cause burns or electric
shock.
Do not use water or other liquids to clean the heat pump, as this can cause an electric shock or fire.

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3Overview of the heat pump
3.1 Identifying the model
The ecoGEO C heat pump range includes a built-in, 170 litre hot water tank. This heat pump range is available
in 6 different models depending on their scope and thermal power, as stated in Table 3.1 .
Model
Heating and DHW
Free cooling
Active cooling
Heating output (kW)
ecoGEO C1 3-12 •3-12
ecoGEO C1 5-22 •5-22
ecoGEO C2 3-12 ••3-12
ecoGEO C2 5-22 ••5-22
ecoGEO C3 3-12
•
•
3-12
ecoGEO C3 5-22 ••5-22
Table 3.1. Models available in the ecoGEO C heat pump range.
ecoGEO C1 versions provide non-simultaneous heating and DHW by use of a 3-way valve. ecoGEO C2 versions,
besides the above, provide free cooling, which allows moderate cooling of the dwelling with a minimum
consumption by the heat pump (consumption only by the circulation pumps). ecoGEO C3 models provide
simultaneous heating/active cooling and DHW through cycle inversion. Finally, each of these three versions can
provide modular heating power in the 3-12 kW and 5-22 kW ranges through inverter compressors.
Accessories
The following accessories are included with the heat pump.
Component
Units
Manual 1
1'' flexible hose L = 1200 mm 4
1" Particle filter
2
Rubber Seal Kit 1
th-Tune indoor terminal 1
Outdoor temperature probe 1
Temperature probe for external tank 1
Table 3.2. Accessories included with the ecoGEO C heat pump.

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3.2 Operating principles
ECOFOREST geothermal pumps are designed to be easy to install, and provide heating, cooling and DHW all
year round, while ensuring maximum energy efficiency.
Figure 3.1. Geothermal heat pump
Installations using geothermal heat pumps are composed of three main circuits (refrigerant circuit, brine circuit
and heating/cooling circuit) in which, through the use of various fluids (refrigerant, antifreeze/water mixture
and water) thermal energy is exchanged between the ground and the building's heating/cooling system. These
circuits use different fluids, and therefore the transfer of thermal energy from one fluid to another is
accomplished by heat exchangers, where the higher temperature fluid transfers heat to the fluid at a lower
temperature without mixing.
The following describes the operation modes provided by the various technologies incorporated into
ECOFOREST geothermal heat pumps.
HEATING mode
During the normal operating cycle, heat pumps extract energy from the ground to produce hot water for the
heating system. The operation can be divided into four sub-processes that are repeated cyclically.
1. The antifreeze mixture is circulated by a circulator pump through the brine system, which absorbs heat
from the ground, and the evaporator, which transfers heat to the refrigerant in the refrigerant circuit.
The liquid refrigerant in the evaporator is at low pressure and temperature, and is vaporised by the
heat absorbed by the antifreeze mixture.
2. The refrigerant vapour from the evaporator is led to the inverter compressor (variable speed), which
raises its pressure and temperature (hot gas) just enough to meet the demand of the heating system at
any time.

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3. The hot gas from the compressor is led to the condenser where it releases its heat to the water in the
heating system. Following this transfer of heat, the refrigerant is cooled and condensed, becoming
liquid.
4. The liquid refrigerant fluid is conducted back to the evaporator through the electronic expansion valve
that accurately controls the flow rate of refrigerant according to the heating system needs. At the same
time, as it passes through the electronic expansion valve, the pressure and temperature of the
refrigerant is reduced so that it can again absorb heat from the antifreeze mixture in the evaporator.
ACTIVE COOLING mode (ecoGEO C3 models only)
Active cooling consists of inverting the operation cycle of the heat pump refrigerant circuit via a 4-way valve.
This implies that the condenser in the normal cycle becomes the evaporator inverted cycle and vice versa. In
this mode, the indoor system fluid (water) extracts heat from the house and releases it to the refrigerant in the
evaporator, while the antifreeze mixture absorbs heat from the refrigerant in the condenser and gives it up to
the ground. This mode of operation is called active cooling or inverted cycle refrigeration.
This technology allows homes (or premises) to be climate controlled throughout the year, even in areas where
high temperatures are reached in the warmer months.
PASIVE COOLING mode (ecoGEO C2 models only)
The heat pump includes another heat exchanger that allows direct heat exchange between the coolant mixture
in the brine circuit and the water in the cooling system, so that no refrigerant circuit is used. In this operating
mode, the compressor is off and cooling and brine circuits are led to the free cooling exchanger using 3-way
valves. Thus, the equipment drives cool water –obtained by heat exchange with antifreeze mixture from the
brine system– to the indoor cooling system, all of which is powered by the circulating pumps.
This technology allows homes (or premises) to be climate controlled throughout the year in temperate zones
where temperatures in the warm months are not excessively high. It should be stressed that, in FREE COOLING
mode, power consumption is very low due to the high efficiency of the circulation pumps.
DHW mode
Domestic hot water (DHW) is produced using two different technologies, according to model.
In ecoGEO C1 and ecoGEO C2 models, DHW heating is produced by diverting the hot water from the condenser
to the DHW hot water tank coil via a 3-way valve.
ecoGEO C3 models feature the patented CHW technology (Closed Hot Water Production System). This totally
innovative technology consists of the introduction of an additional heat exchanger (desuperheater) solely for
producing DHW. This exchanger is placed in series with the main condenser and provides hot water to the hot
water tank coil via a closed circuit. Furthermore, since the reverse cycle is performed after the desuperheater,
it allows simultaneous production of hot water and air conditioning (active heating or cooling).
LEGIONELLA PROTECTION mode
The heat pump has an electric heater installed in the hot water tank that is used only to prevent possible
outbreaks of legionella. Once a week, the heat pump increases the temperature in the tank to 50°C.
Subsequently the electric heater is activated to raise the temperature of the hot water tank from 50°C to 70°C.

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At this temperature the bacteria cannot survive for over 20 minutes. It is recommended that these heating
procedures be done at night, when it is more likely that the hot water tank is at a higher temperature and
when no DHW is consumed, thereby reducing the power input needed.
During normal operation, the electric heater cannot be activated for other purposes than legionella
protection; that is, the electric heater is never used for DHW production, or to support the heating system.
FAULT mode
In the event of a possible failure of the heat pump that does not allow the compressor to start up, the electric
heater may be activated to produce DHW. This guarantees DHW poduction if the heat pump fails.

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3.3 Dimensions and Connections
The overall dimensions of the heat pumps ecoGeo C range are specified in Figure 3.2 .
45
67
9
8
10
600
700
1800
3
1
2
Number Description Number Description
1 Upper module 6 Brine outlet (G1'' F)
2
Lower module
7
Brine inlet (G1'' F)
3 Front panel 8 DHW outlet (G1'' F)
4 Heating/cooling outlet (G1'' F) 9 Cold water inlet (G1'' F)
5 Heating/cooling inlet (G1'' F) 10 Power input
Figure 3.2. Dimensions and Connections

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3.4 Main components
ecoGEO C1 Models
1
3
22
2
4
5
6
7
9
8
24
30 29
10
11 14
12
16
15
27
21
25
13
31
32
28
20
19
17
23
18
26
Number Description Number Description
1
DHW tank (170 l)
17
DHW circuit check valve
2 Electrical cabinet 18 DHW circuit automatic air vent
3 Condenser 19 DHW tank drain valve
4 Evaporator 20 Brine circuit drain valve
5
Inverter compressor
21
Heating circuit drain valve
6 Liquid tank with filter 22 Electric heater (legionella protection)
7 Electronic expansion valve 23 DHW tank temp. probe
8 High pressure switch 24 Compressor suction temp. probe
9
Low pressure switch
25
Brine outlet temp. probe
10 Brine pump 26 Brine inlet temp. probe
11 Heating pump 27 Heating outlet temp. probe
12 3-way heating/DHW valve 28 Heating inlet temp. probe
13 Brine expansion vessel (5 l) 29 High pressure transducer
14 Heating expansion vessel (12 l) 30 Low pressure transducer
15 Brine safety valve (6 bar) 31 Brine pressure transducer
16
Heating safety valve (6 bar)
32
Heating pressure transducer
Figure 3.3. Location of components in ecoGEO C1 models.

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ecoGEO C2 Models
1
3
25
2
4
6
7
8
10
9
27
33 32
11
12 17
16
13 19
34
30
24 28
29
18
35
31
23
22
20
26
5
15
14
21
Number Description Number Description
1
DHW tank (170 l)
19
Heating/cooling safety valve (6 bar)
2
Electrical cabinet
20
DHW circuit check valve
3
Condenser
21
DHW circuit automatic air vent
4
Evaporator
22
DHW tank drain valve
5
Free cooling heat exchanger
23
Brine circuit drain valve
6
Inverter compressor
24
Heating/cooling circuit drain valve
7
Liquid tank with filter
25
Electric heater (legionella protection)
8
Electronic expansion valve
26
DHW tank temp. probe
9
High pressure switch
27
Compressor suction temp. probe
10 Low-pressure switch 28 Brine outlet temp. probe
11 Brine pump 29 Brine inlet temp. probe
12 Heating/cooling pump 30 Heating/cooling outlet temp. probe
13 3-way heating/DHW valve 31 Heating/cooling inlet temp. probe
14 3-way free cooling valve (brine) 32 High pressure transducer
15
3-way free cooling valve (cooling)
33
Low pressure transducer
16
Brine expansion vessel (5 l)
34
Brine pressure transducer
17
Heating/cooling expansion vessel (12 l)
35
Heating/cooling pressure transducer
18
Brine safety valve (6 bar)
Figure 3.4. Location of components in ecoGEO C2 models.

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ecoGEO C3 Models
1
3
28
2
4
6
7
8
14
13
30
36 35
16
17
19
18
21
37
33
27
31
20
38
34
26
25
22
29
15
24
11
5
9
10
12
23
32
Number Description Number Description
1 DHW tank (170 l) 20 Brine safety valve (6 bar)
2 Electrical cabinet 21 Heating/cooling safety valve (6 bar)
3
Condenser/Evap. (normal/reverse cycle)
22
DHW circuit check valve
4
Condenser/Evap. (normal/reverse cycle)
23
DHW circuit automatic air vent
5
DHW desuperheater
24
DHW circuit drain valve
6
Inverter compressor
25
DHW tank drain valve
7
Liquid tank with filter
26
Brine circuit drain valve
8
Electronic expansion valve
27
Heating/cooling circuit drain valve
9
Reversing cycle valve
28
Electric heater (legionella protection)
10 Liquid line check valve (x4) 29 DHW tank temp. probe
11 Discharge line check valve 30 Compressor suction temp. probe
12 Discharge line solenoid valve (x2) 31 Brine outlet temp. probe
13 High pressure switch 32 Brine inlet temp. probe
14 Low-pressure switch 33 Heating/cooling outlet temp. probe
15 DHW circulation pump 34 Heating/cooling inlet temp. probe
16 Brine pump 35 High pressure transducer
17
Heating/cooling pump
36
Low pressure transducer
18
Brine expansion vessel (5 l)
37
Brine pressure transducer
19
Heating/cooling expansion vessel (12 l)
38
Heating/cooling pressure transducer
Figure 3.5. Location of components in ecoGEO C3 models.

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3.5 Access to the interior
Installation, commissioning and maintenance of the heat pump requires access to various points inside the
heat pump. To do so, it may be necessary to remove one or more of the equipment's covers.
ecoGEO C heat pumps have front, side and rear removable covers divided into two. The covers located at the
bottom allow you to access module components, while those on top allow access to the components on the
top (see section 3.4). You can also get inside the equipment through the top cover.
Access to the upper front part
1. Remove the screws located on the top of the lid.
2. Pull the cover upwards to disengage the lower part of the cover from the structure.
3. Remove the cover by pulling forward and put it in a place where it can not be damaged.
1
2
Figure 3.6. Removing the upper front cover.
NOTE
When removing the upper front cover, be careful to remove the wire from the electrical cabinet to
the front panel without damaging it. Damage may cause equipment malfunction.

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Access to the lower front part
1. Remove the upper front cover as described above.
2. Remove the fixing screws located on the top of the lid.
3. Pull the cover upwards to disengage the cover from the structure.
4. Remove the cover by pulling forward and put it in a place where it can not be damaged.
1
2
Figure 3.7. Removing the lower front cover.

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Access to the sides
1. To access the lower side of the module, remove the upper and lower front covers. To access the side of
the upper module, remove only the top front cover.
2. Remove the fixing screws located on the top of the side cover you wish to remove.
3. Pull the side of the lid using the screws to get it out of the structure.
4. Remove the cover by pulling forward and put it in a place where it can not be damaged.
Figure 3.8. Removing the side covers.

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Access to the rear and the top
The covers of the rear and top of the heat pump can also be removed if necessary.
1. Remove the screws holding the cover to the frame.
2. Remove the cover and put it in a place where it can not be damaged.
X4
X8
X6
Figure 3.9. Remove the back covers and top cover.

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4User Guide
4.1 Description of the front panel
The heat pump front panel consists of a monochromatic display and 6 buttons, as shown in Figure 4.1. The
general functions of each of the buttons is shown below the picture. To access certain menus, button
combinations are needed; these are shown below.
2
2
3
6
4
5
1
Number Description Number Description
1
Screen
4
Direct access button to alarm menu [Alarm]
2 Navigation buttons [↑] / [↓] 5 Direct access button to user menu [Prog]
3 Select and accept button [←] 6 Back button [Esc]
Figure 4.1. Front panel.
Navigation buttons [↑] / [↓]
The navigation buttons are used for three types of actions. First, to scroll through menu lists on a screen.
Second, to switch from one screen to the next or back in a menu. Third, to change the value of the parameters
when they are selected.
Select and accept button [←]
This button is used for several purposes. On one hand, to select the desired menu lists within a screen. Also, in
a settings screen with modifiable values, press this button to perform the desired changes; once a value has
been edited, press this button to accept it and move to next.
4.2 Programs
ECOFOREST ecoGEO C heat pumps have three main operating programs, described below.
WINTER Program
The heat pump only permits activation of the operating modes HEATING, DHW, LEGIONELLA PROTECTION and
FAULT. The ACTIVE COOLING and FREE COOLING operating modes cannot be operated.