CIAT GeoCIAT User manual

Instruction manual
GeoCIATTM Modular
07 - 2016
NA 13.14 E

EN
EN - 1
CONTENTS PAGE
1. GENERAL INFORMATION 2
1.1 General information 2
1.2 General warnings 2
1.3 Basic safety rules 4
1.4 Waste disposal by users in private waste facilities within the European Union 4
1.5 Introducing the GeoCIATTM Modular 5
1.6 Unit dimensions and clearances (mm) 6
1.7 Weight (kg) 6
2. INSTALLATION 7
2.1 Location of the control terminal and the heat pump 7
2.2 Hydraulic connections 9
2.3 Electrical connections 15
3. COMMISSIONING 21
3.1 Checks 21
3.2 Starting up the unit 21
3.3 Air bleed sequence 30
 3.4Activatingtheunderoorheatingsystem 31
4. SERVICING/MAINTENANCE 32
4.1 Unit maintenance 32
4.2 Checks 33
4.3 Recommendations 33
4.4 Operating readings 33
5. HOMECONNECT CONTROL 34
5.1 Terminal unit screen display 34
5.2 Accessing the settings 36
 5.3Conguration 37
5.4 Operating modes 42
5.5 Heating elements 44
5.6 On/Off control inputs 46
6. SPECIFICATIONS 47
 6.1Technicalspecications 47
6.2 Sound levels 47
6.3 Flow rates 48
6.4 Refrigerating and hydraulic circuit diagram 49
6.5 Operating pressure of the accelerator pumps 49
7 FAULTS 50
8. FUNCTIONS 51
8.1 Automatic restart 51
8.2 Selecting the operating mode 51
8.3 Short-cycle protection 51
8.4 Automated self-regulating control 51
9. OPTIONS 51
9.1 Pool heating 51
9.2 Humidity sensor 51
9.3 Limiter thermostat 51
9.4 Domestic Hot Water: BALLON ECS 170L 51
9.5 Buffer capacity: CAPA 100L 51
9.6 Dual zone heating control 51
9.7 4kW electric heating element 51
9.8 Passive cooling 51
10. TABLE OF SENSOR VALUES 52
11. TEST MODE 53
12. OPERATING LIMITS 53
13. RADIO SIGNAL 53
14. CONTROL BOARD 55

EN - 2
1. GENERAL INFORMATION
1.1 General information
CIAT Residential would like to thank you for choosing the GeoCIATTM Modular. This geothermal heat pump is designed for
heating and hot water production in individual homes. Please read this instruction manual carefully before installing and switching
on the unit. CIAT Residential guarantees the GeoCIATTM Modular unit for 24 months from the date it leaves the factory (see
general warranty terms and conditions).
1.1.1 Conformity
GeoCIATTM Modular heat pumps comply with the following
European directives and standards:
• LVD 2014/35/EU
• NF C15-100
• EMC 2014/30/EU
• NF EN 60335-2-40, 60335-1
• EMC EN 61000 6-1, 61000 6-2, 61000 6-3,
61000 6-4, 61000 3-3, 61000 4-4, 61000 4-6, 55014-1
• Radio EN 330-220
• PED 2014/6/EU
• WEEE 2012/19/EU
• RoHS 2011/65/UE
In accordance with standard 61000-3-11, the user must confirm
via the energy supplier that the models below are connected
to a supply with an impedance either below or equal to the
indicated Zmax value.
1.1.2 Symbols
The pictograms used in the following sections enable the user
to quickly and clearly understand the information required to
ensure that the machine is used safely.
WARNING
Paragraphs preceded by this symbol contain very
important information and provisions, in particular
concerning safety.
Failure to follow this information may result in:
- danger to operators.
- loss of the warranty or waiving of the manufacturer's liability.
CROSS REFERENCE
This symbol indicates a cross reference with other
manuals or pages in the manual.
INFORMATION
This symbol indicates that useful or additional
information is available.
1.1.3 Equipment supplied
- One uncased GeoCIATTM Modular unit,
- a casing kit comprising 2 sides, a roof, two front panels, a trim
strip and male ball joints to be mounted on the frame
- a HomeConnect wireless control terminal,
- a wireless outdoor sensor,
- installation instructions,
- a user manual
Name Network type Zmax (Ohm)
GeoCIATTM Modular 20H Single-phase 0.2 Ω
GeoCIATTM Modular 33H Single-phase 0.22 Ω
GeoCIATTM Modular 45H Single-phase 0.15 Ω
GeoCIATTM Modular 45HT Three-phase 0.165 Ω
1.2 General warnings
1.2.1 Unpacking the equipment
The GeoCIATTM Modular is delivered on a pallet in its own
packaging. Even if the packaging appears to be intact, please
check that the contents have been supplied in full and are
in good condition. In case of problems, enter the necessary
details on the delivery note and confirm by registered letter to
the shipper within 3 days of delivery.
Casing packaging box
GeoCIATTM Modular packaging box

EN
EN - 3
1.2.2 Removing the shipment protection
1 - Remove the lag bolt (fig. 1) securing the pallet to the heat pump
2 - Remove the red brackets (fig. 2) used to secure the refrigerating block to the frame during transport
1.2.3 Assembling the casing panels
1- Fit the male ball joints (fig. 1) on the frame (12 ball joints) (fig. 1b)
a. Use a wooden mallet to avoid damaging the male ball joints during fitting
b. Make sure that the transport brackets have been removed
2- Assemble the roof and the 2 side panels between the female couplers (fig. 2) and the male ball joints on the frame (fig. 3)
3- Fit the GeoCIATTM Modular front panels (fig. 4) in the slots provided (fig. 5)
Position of the lag bolt
at the front of the unit
Fig.1 Fig.2
Remove the 2 red brackets
on the left and right to
release the refrigerating
block completely
Fig.1 b Fig.3
Fig.2
Fig.1
Fit the 12 male ball joints (same on both sides):
GeoCIATTM Modular casing:
Fig.2
Fig.3
Fitting the front panels:
Fig.4
Fig.5
Fig.4
Panel lugs
Slots on the frame into which
the panel lugs are slid

EN - 4
1.2.4 Identifying the equipment
A legible and indelible data plate listing the specifications of the
unit is affixed in a visible location on the unit.
This information (particularly the description and the serial
number) must be quoted in all correspondence.
The HP MAX value: PSM indicated on the name plate is the
maximum operating pressure (= 42 bar)
This value corresponds to the activation pressure for the safety
device: the HP pressure switch. A burst test on a representative
model is carried out periodically in accordance with standard
EN 378-2. The burst pressure must be at least 3 times the
operating pressure, i.e. 3 x 42 bar = 126 bar.
1.2.5 Handling
Units on pallets must be transported using a pallet truck.
Warning: the machine must be moved using a suitable means
of transport. The heat pump must not be dragged along the
ground directly on its rubber feet, as this may damage the
adjustment system.
Wear suitable gloves when handling the unit.
1.2.6 Installation
CIAT units must only be installed by experienced, qualified
personnel with the necessary electrical and hydraulic
accreditation. The installing company must provide the
equipment manager with a declaration of conformity in
accordance with current standards and the indications supplied
by CIAT in this manual. The recommendations and instructions
given in the maintenance brochures and the special instructions
on the labels must be followed.
Always comply with applicable standards and regulations.
CIAT accepts no contractual or non-contractual liability for
damage caused to persons, animals or property due to
installation, maintenance or servicing errors or misuse.
This instruction manual and the user manual form an integral
part of the unit, and must therefore be kept safe and ALWAYS
handed over if the unit is transferred to a new owner or another
system. If a manual is damaged or lost, you can order a new
copy by emailing [email protected]
1.3 Basic safety rules
To prevent the risk of accidents during installation,
system start-up and adjustment, it is essential to
remember that a heat pump contains a pressurised
refrigeration circuit and refrigerant, as well as electrical
voltage and fluid at a temperature up to 150°C (risk of burns
from touching the pipes)
Note that certain basic safety rules apply to the use of this type
of unit:
• Before carrying out any work on the equipment, ensure
that the supply voltage is switched off (and the capacitors
discharged). Any electrical discharge carries a risk of injury.
• The unit must not be used by unsupervised people with
disabilities or children.
• It is forbidden to touch the unit in bare feet or if any part of the
body is wet or damp.
• It is forbidden to modify the safety or adjustment devices
without authorisation and instructions from the device
manufacturer.
• For work on the machine during or shortly after operation,
wear gloves suitable for high temperatures and electrically
insulated tools.
1.4 Waste disposal by users in private waste
facilities within the European Union
This symbol indicates that the product and its packaging
must not be disposed of in ordinary household
waste or in the natural environment. It is your
responsibility to ensure your waste is taken
to a designated recycling point for electrical
and electronic devices. Separating your waste
for recycling during disposal helps protect the
environment and safeguard health.
To find your nearest recycling centre, contact your local council
or waste disposal service.
The units are not stackable.

EN
EN - 5
GeoCIATTM Modular specifications
HomeConnect control terminal
- 868 Mhz wireless link
- IO Homecontrol®radio protocol
- Clock function
- Weather station function
- Room thermostat
- Choice of 3 permanent temperatures in heating mode: frost-
free, economy, comfort
- Customisable weekly programming hour by hour and day by
day in heating mode
- Customisable weekly programming hour by hour and day by
day in domestic hot water production mode
- Absence management
- Turn and click type navigation button
- White backlit hybrid LCD screen
- Dimensions: width: 9 cm, height: 14 cm, thickness: 2.5 cm
- Wall mounting plate support
- Support foot
- Operating temperature from 0°C to 45°C
- Powered by 3 x 1.5V LR06 AA batteries
- Protection rating: IP 30
- Class II insulation
- Supplied with wall bracket, foot and batteries
Outdoor sensor
- 868 Mhz wireless link
- Homecontrol®IO radio protocol
- Operating temperature: -20°C/+60°C (tolerance +/- 1.5°C)
- Storage temperature: -30°C/+80°C
- Powered by 2 x 1.5V LR06 AA batteries
- Material: PC (UV) & ABS
- Colours: White & Grey
- Dimensions: 78 x 78 x 37 mm
- Weight: 150g
- Assembly/removal of front cover using a bayonet system
- Protection rating: IP 34
- Supplied with batteries
GeoCIATTM Modular unit: Glycol/water mix heat pump for new and existing homes. The GeoCIATTM Modular delivers water up
to 62°C.
NFPAC certified under number NF414-849.
1.5 Introducing the GeoCIATTM Modular
Navigation
button
HomeConnect control terminal
Display Battery compartment
Base
Room sensor
Outdoor sensor
GeoCIATTM Modular heat pump
heat pump

EN - 6
1.6 Unit dimensions and clearances (mm)
1.7 Weight (kg)
APPAREIL OU UNITE
DESIGNATION
NUMERO DE PLAN INDICE
CE DOCUMENT EST LA PROPRIETE DE CIAT, IL NE PEUT PAS ETRE UTILISE, REPRODUIT OU COMMUNIQUE SANS AUTORISATION ECRITE.
682
44 44
594
757
724
536 510
1046
1053±5
650
708
MODIFIE PAR DATE MODIFICATION
01350 CULOZ
FRANCE
ECHELLE
0.059
FOLIO
1/1REMPLACE :
FORMAT
A3
VERIFIE PAR : DATE :
DESSINE PAR : DATE : PAC_MOD_GEO_TOR00
0.0
ENS TUYAUX
... xx-xx-06
7011969
&epaisseur[.1]
... ... ...
&matiere_stdMATIERE :
SPEC :
NORME :
EPAISSEUR (mm) :
TRAITEMENT :
MASSE (kg) :
70
70
70
508
760
130
685
1055+5
APPAREIL OU UNITE
DESIGNATION
NUMERO DE PLAN INDICE
CE DOCUMENT EST LA PROPRIETE DE CIAT, IL NE PEUT PAS ETRE UTILISE, REPRODUIT OU COMMUNIQUE SANS AUTORISATION ECRITE.
682
44 44
594
757
724
536 510
1046
1053±5
650
708
MODIFIE PAR DATE MODIFICATION
01350 CULOZ
FRANCE
ECHELLE
0.059
FOLIO
1/1REMPLACE :
FORMAT
A3
VERIFIE PAR : DATE :
DESSINE PAR : DATE : PAC_MOD_GEO_TOR00
0.0
ENS TUYAUX
... xx-xx-06
7011969
&epaisseur[.1]
... ... ...
&matiere_stdMATIERE :
SPEC :
NORME :
EPAISSEUR (mm) :
TRAITEMENT :
MASSE (kg) :
70
70
70
508
760
130
685
1055+5
APPAREIL OU UNITE
DESIGNATION
NUMERO DE PLAN INDICE
CE DOCUMENT EST LA PROPRIETE DE CIAT, IL NE PEUT PAS ETRE UTILISE, REPRODUIT OU COMMUNIQUE SANS AUTORISATION ECRITE.
682
44 44
594
757
724
536 510
1046
1053±5
650
708
MODIFIE PAR DATE MODIFICATION
01350 CULOZ
FRANCE
ECHELLE
0.059
FOLIO
1/1REMPLACE :
FORMAT
A3
VERIFIE PAR : DATE :
DESSINE PAR : DATE : PAC_MOD_GEO_TOR00
0.0
ENS TUYAUX
... xx-xx-06
7011969
&epaisseur[.1]
... ... ...
&matiere_stdMATIERE :
SPEC :
NORME :
EPAISSEUR (mm) :
TRAITEMENT :
MASSE (kg) :
70
70
70
508
760
130
685
1055+5
Uncased view
Cased view
150 mm
600 mm 600 mm
1000 mm
GeoCIATTM
Modular
20H 33H 45H(T)
Weight (empty)* 135 150 148
Weight
(in operation) 164 180 178
*Excluding shipping pallet

EN
EN - 7
2. INSTALLATION
2.1 Location of the control terminal and the heat pump
2.1.1 Control terminal
At delivery, the HomeConnect control terminal is located behind the GeoCIATTM Modular unit.
Location
Before fixing the control terminal in place, check the range of the radio signal. This should be at the maximum level.
If this is not the case, you can also move the heat pump a few centimetres to ensure optimal transmission of its radio signal.
Selecting a location
The terminal operates permanently as a room thermostat. It is therefore essential to place the control terminal inside the home,
within the environment to be monitored and away from heat sources (chimney, radiator, sunlight), draughts (windows, doors) and
areas of activity.
Mounting
The terminal is supplied with a wall mounting plate (base) and a base.
The wall mounting plate should be affixed using screws and wall plugs (FS Ø4 mm flat head slotted screws, Ø5 mm wall plugs),
which are not supplied, using the holes marked on the mounting plate.
The battery compartment has ribs on either side to hold the terminal on its mounting plate.
Once the mounting plate is affixed to the wall, slide the terminal into place.
The terminal is positioned in the same way on the base.
Outdoor sensor
Control terminal

EN - 8
2.1.2 Outdoor sensor
At delivery, the outdoor sensor is located inside its own box behind the heat pump. It sends a temperature value to the control
board every 30 minutes, or if there is a variation of around 0.5°C.
a) Installation and location
Position the outdoor sensor on the front of the frame, orienting it as far north as possible.
Make sure the outdoor sensor is not exposed to direct sunlight, and place it in a vertical position.
b) Mounting
Proceed as follows to remove the sensor's cover:
Incorrect positions Correct position
Turn the cover
anticlockwise to align
the 2 arrows on the side
Detach the cover
from the wall bracket
u v
Mounting
holes
- Drill 2 holes (6 mm diameter) in the wall, one above the other approximately 17 mm apart
- Affix the wall bracket in the recommended position using the mounting holes provided
- Position the elongated hole horizontally at the bottom: the word UP must be legible
- Affix the wall bracket using screws and wall plugs (FS Ø4 mm flat head slotted screws, Ø5 mm wall
plugs), which are not supplied, using the mounting holes
To close the sensor:
- Place the cover on the body.
- Turn the cover clockwise to lock it.
2.1.3 GeoCIATTM Modular heat pump
The GeoCIATTM Modular must only be located inside a machine room, garage or laundry room. Ensure that the structure
of the machine room can support the weight of the unit. The module must be perfectly level (adjustable feet under the
GeoCIATTM Modular) and installed with the minimum free space as described in paragraph 1.6.
Sound level: our units are designed to operate quietly. However, as soon as you begin designing your system, you should take
into consideration its position in your home. The unit must not be located near bedrooms.
Placing the unit in a corner will substantially increase its sound level. Ventilation ducts and clearance zones can also
transmit noise. If in doubt, have an analysis performed by an acoustical engineer.
Positioning: when positioning the unit, lift it without tilting it too much
Accessibility: leave sufficient room around the unit to allow easy access for installation and maintenance (see diagram in
paragraph 1.6).

EN
EN - 9
OUTLET
OUTLET
INLET
INLET
OUTDOOR
CIRCUIT
INDOOR
CIRCUIT
Mandatory 3 bar valves
Shut-off valve
Screen filter valve
(option)
Screen filter valve
(option)
Shut-off valve
2.2 Hydraulic connections
Pipes
Adhere to the installation standards and trace the pipe routing
carefully:
 observe the drain direction (inlet/outlet) indicated on the unit
the following accessories are essential to any hydraulic system
and must also be installed
- 3 bar valve-gauge assembly (mandatory)*
- automatic air bleed valves at high points
- discharge nozzles at low points
- balancing valves
- additional expansion vessels if necessary
- thermometer pockets, etc.
* the safety valve, which is mandatory on the hydraulic circuit,
must be tested manually at least once a year.
the pipes and tubes should not transmit any forces or
vibrations to the exchangers. Hoses must be used to connect
water pipes.
use at least 2 shut-off valves on each circuit in order to isolate
the unit
- screw in the system's flexible connectors/pipes
by hand
- tighten them using two spanners
Failure to tighten with two
spanners could cause the
couplings to rupture and
may result in the equipment
warranty being voided.
Fasten the water pipes to the walls with brackets lined with highly flexible rubber to prevent the transmission of vibrations.
vibration-damping
material
vibration-damping
material
Insulate the pipes and hoses carefully to prevent heat
loss and condensation.
Nominal flow
rate (m3/h) for
hot water
production
Copper pipe
hydraulic
connection
Steel pipe
hydraulic
connection
PE
(polyethylene)
pipe hydraulic
connection
20H 128X1 33/42 - DN32
1”1/4 32 x 2.9
33H 1,3 28X1 33/42 - DN32
1”1/4 32 x 2.9
45H(T) 1,7 32X1 33/42 - DN32
1”1/4 40 x 3.7
Inlet/outlet diameter
indoor/outdoor circuits
Min. bend
radius (R) of
hoses (mm)
20H
∅G 1” Male gas nipples 14033H
45H(T)
System pipe diameters and nominal flow ratesUnit outlet pipe diameters
Diameters calculated for a 15m hydraulic connection between the
heat pump and the system outlet.
A screen filter must be added
to the heat pump's primary and
secondary circuits. Failure to
follow this instruction may result
in blocked or fouled exchangers.
CIAT accepts no responsibility for
clogging or malfunctioning of the heat
pump in the event of failure to install
screen filters.
ALWAYS COMPLY
WITH THE HOSE BEND
RADIUS

EN - 10
Outdoor circuit - Schematic diagrams
A- Open circuit - Groundwater or well
Mandatory safety valve
Hydraulic
hoses Mandatory
safety valve
Screen
filter
20% MPG
(Monopropylene
glycol)
Intermediate exchanger*
(see documentation N10.51 ITEX+
instruction manual and applicable
residential catalogue)
Discharge
Strainer valve
Well or
ground water
Solenoid valve
Outside water network
(pump with booster or mains water)
Place a screen filter upstream of the
well pump if the latter is not suitable
for unfiltered water
Shut-off valves
Thermometer pockets
Control valve
*Intermediate exchanger:
This exchanger is mandatory for water-to-water operation, and protects your GeoCIATTM Modular from:
- fine suspended solids (risk of clogging) or aggressive water.
- iron, manganese or chlorine (risk of corrosion or deposits)
We therefore recommended that you have the physical and chemical properties of your water analysed (B3C3 type analysis) to
determine what types of materials should be used.
This exchanger also limits the number of times the frost protection is turned on when your system is started up in cold weather
or after a prolonged period without use.
CIAT declines all liability for clogging and malfunctions of the exchanger in the GeoCIATTM Modular if this
exchanger is not installed.
A constant flow of water must be maintained in the exchangers.
Note: the schematic diagrams herein are provided for information only. Under no circumstances do they constitute actual
installation diagrams.
Screen filter
INDOOR
CIRCUIT
Well pump
(see page 19 for electrical connection)

EN
EN - 11
B- Closed circuit - Underground loop or geothermal loop
Note: the schematic diagrams herein are provided for information only. Under no circumstances do they constitute actual
installation diagrams.
Hydraulic hoses
20% or 40% MPG (monopropylene glycol)
Buried glycol
solution loop
Filler material
Geothermal sensor
Return
circuit
Supply circuit
Shut-off valves
Thermometer pockets
Mandatory safety valve
Mandatory
safety valve
Screen filter Screen filter
A
B
A
B
INDOOR
CIRCUIT
Filling
kit
(option)

EN - 12
Note: the schematic diagrams herein are provided for information only. Under no circumstances do they constitute actual
installation diagrams.
Indoor circuit - Schematic diagrams
A - Radiators
To install a GeoCIATTM Modular heat pump with one or more MODULE options, please refer to the specific N12.108
installation instructions.
Filling
kit
(option)
Filling
kit
(option)
Screen
filter valve
Screen filter
Flexible
connection kit
(mandatory)
Flexible connection kit
(mandatory)
Shut-off valves
Thermometer pockets
Control valves
Radio connection
Discharge valve
Safety
valve
Outdoor
sensor
Radio signal
Radio signal
Radiator*
HomeConnect
Radiator*
* The radiators can be replaced with Divio or Major Line fan coil units (CIAT ref.).
** for customer accelerator pump wiring, see page 20
For operation with radiators, the discharge valve is mandatory to prevent water flow rate
faults when the radiators are closed
see p10 and p11
TO OUTDOOR CIRCUIT
Automatic
degassing
device
CAPA 100L
Option
Customer accelerator
pump**
(if required)
GeoCIATTM Modular

EN
EN - 13
B- Underfloor heating/cooling system + comfort units
Note: the schematic diagrams herein are provided for information only. Under no circumstances do they constitute actual
installation diagrams.
Flexible connection kit
(mandatory)
Shut-off valves
Thermometer pockets
Control valves
Radio signal
Radio signal
Radio signal
Wire connection
HomeConnect
Underfloor heating system
Safety valve
(3 bar)
DIVIO
ZONE 1
ZONE 2
DIVIO
Screen
filter valve
Screen
filter valve
Automatic
degassing
device
Dual zone kit
integrated into
CAPA 100L
Humidity sensor kit (option) or
UHCS safety thermostat kit
(option)
Outdoor
sensor
Filling
kit
(option)
Filling
kit
(option)
CAPA 100L
TO OUTDOOR CIRCUIT
see p10 and p11
Customer accelerator
pump**
(if required)
** for customer accelerator pump wiring, see page 20
GeoCIATTM Modular

EN - 14
D- Connection with boiler back up operation
Note: the schematic diagrams herein are provided for information only. Under no circumstances do they constitute actual
installation diagrams.
Shut-off valves
Thermometer pockets
Radio signal
Charged via
municipal water
supply
Comfort unit type
heating emitters
If using an under-
floor heating/cool-
ing system, the
UHCS
safety thermostat
kit option is
recommended.
BOILER
3 bar
safety valve
mandatory
Thermostatically
controlled valve
Boiler out-
door
sensor
Accelerator
pump
Check valve
+ pressure gauge
Screen
filter valve Screen
filter valve
Automatic
degassing device
Domestic hot
water boiler
CAPA 100L
Flexible connections
(mandatory)
Safety
valve
(3 bar)
HomeConnect
Outdoor
sensor
see p10 and p11
TO OUTDOOR CIRCUIT
GeoCIATTM Modular

EN
EN - 15
System frost protection (at the installer's expense)
CIRCUITS
Indoor circuit: Parameter P5 is used to add glycol to the indoor
circuit. A glycol/water solution is not necessary in certain areas,
if you are absolutely sure that your indoor circuit will always
remain at above-freezing temperature. If in doubt, use 40%
MPG (monopropylene glycol).
Outdoor circuit:
- The loop between the intermediate exchanger and the heat
pump must contain a 20% MPG solution.
- Parameter P06 must be set to NO if the indoor circuit does
not contain a glycol solution or 40% MPG if the outdoor circuit
contains a 40% glycol solution.
FROST PROTECTION
We highly recommend that you drain sections not protected by
glycol/water solution (well loop and, if need be, the indoor circuit)
if you turn off the heating system intentionally or if there is a risk
of it being accidentally turned off.
 Sections that must be protected by glycol/water solution
should contain the following proportions of MPG (other
antifreeze with the same freezing point may also be used):
20% MPG: freezing point = -8°C
40% MPG: freezing point = -25°C
The antifreeze may be mixed with a corrosion inhibitor and
even a biocide (follow the instructions of the anti-freeze
manufacturer). Ready-mixed solutions and dilutable products
may also be used.
PROCEDURE
Preparing the system to be protected:
 Always flush the system completely and blow it out to
remove any remaining water.
Washing the system with a suitable cleaner is
recommended (use a cleaner compatible with the system's
materials).
 Follow up the final rinse with a complete drain of the system.
Add the water/antifreeze/corrosion inhibitor mixture and
pressurise using the hydraulic pump.
 If you use a concentrated dilutable solution, follow the
instructions below:
- Always dilute the antifreeze with water before adding it to
the system. Never add them separately.
- Always mix the correct amounts of water, antifreeze and
corrosion inhibitor in a container before adding them to the
system.
- Drain the system thoroughly.
- Allow the mixture to run through the entire system for at least
2 hours before starting the heat pump.
-Use a hydrometer or a refractometer to check the final
proportion obtained.
- Using litmus paper or a pH meter, check the pH obtained.
Affix, in a visible location, a label stating:
- that the system contains antifreeze.
- the name of the product and its supplier.
-the proportion and the pH at commissioning.
Do not use products made with monoethylene glycol (which is toxic)
2.3 Electrical connections
- Remove the unit's front panels to access the electrics box
(see instructions in paragraph 1.2.2 Removing the shipment protection).
Connect to terminal blocks J1, J2, J3, J4 and J5 according to the HomeConnect board' supply mode (single-phase or three-
phase) (see paragraph 2.3.3). For a three-phase power supply, use terminals N(J4), L1(J3) and the green/yellow terminal (J5).
Make sure the terminals are securely tightened.
- Select the supply cable using the table below.
The electrical characteristics of the mains supply must be identical to those on the name plate. The power supply must meet the
following requirements:
230 V 50 Hz for 20H/33H/45H single-phase + Neutral + Earth models.
and 400 V 50 Hz for the 45HT three-phase + Neutral + Earth model.
+ 6 %
- 10%
+ 6 %
- 10%
IMPORTANT:
- Connect the unit to earth before making any other electrical connections.
- The three-phase model must have a neutral.
- The system must be fitted with a main cut-off switch
It is your responsibility to protect the unit from mains voltage spikes and voltage spikes caused by lightning. Depending
on the geographic location and the type of mains network (buried or overhead), you may have to install a lightning rod.
Check your local electrical codes and regulations.

EN - 16
2.3.2 Cable routing
To facilitate the installation of the unit's power supply cables and optional kits, cable trays, Omega type fasteners and cable
clamps are provided.
Accessibility to the GeoCIATTM Modular's electrical section is detailed in paragraph 4.1
GeoCIATTM Modular 20H 33H 45H 45HT
Electrics box maximum temperature °C 45
Unit supply Terminals J3, J4, J5 Terminals J1, J2, J3,
J4, J5
Nominal voltage 230V - 1ph + N + E - 50Hz 400V - 3ph + N + E -
50Hz
Compressor Maximum operating current A 12,8 17,1 22,8 7,4
Accelerator pump
Indoor pump power WMin: 3.8 Max: 70
current A Min: 0.04 Max: 0.52
Outdoor pump power WMin: 5.7 Max: 87
current A Min: 0.06 Max: 0.71
Current of entire unit (max) A 14,18 18,48 24,18 8,78
C or D curve thermal magnetic circuit breaker (not supplied) Am 16 20 32 10
Electrical cables
(not supplied)
PVC insulation(1) mm23G2.5 3G4 3G6 5G1.5
PVC V2K insulation (2) mm23G1.5 3G2.5 3G2.4 5G1.5
Electric heating element supply Terminal block J45 Junction blocks
Nominal voltage 230V - 1ph + N + E - 50Hz 400V - 3ph + N + E -
50Hz
Loop heater power kW 4
Max current A 17,4 6
C or D curve thermal magnetic circuit breaker (not supplied) A 20 10
Electrical cables
(not supplied)
PVC insulation(1) mm23G4 5G1.5
PVC V2K insulation (2) mm23G4 5G1
All or nothing inputs Terminal blocks J11 and J12
Input, bypass, absence, Cooling/Heating, DHW, limiter thermostat mm20.2 - 1
Potential-free contacts Terminal blocks J33, J45 and J46
Boiler ON contact and three-way valve mm21,5
2.3.1 Electrical specifications
The cross-section of the supply cable must be carefully selected based on:
- the maximum current of the unit and the electric heating element
- the distance between the domestic electrics box and the GeoCIATTM Modular
- the room temperature
- the upstream protection and the neutral operating conditions
(1) Cable with 3 or 5 conductors for temperatures below 70°C and for a maximum length of 30 m
(2) Cable with 3 or 5 conductors for temperatures below 90°C and for a maximum length of 30 m
Note: all connections must be wired in compliance with the regulations that apply to the location where the system is installed (e.g.
NF C 15 -100 in France) and are under the responsibility of the installer. Failure to comply with the requirements of the above
standards will invalidate the CIAT warranty.
For terminal J45, the tightening torque must be at least 0.6 Nm.




To be added as an option
(e.g. 4kW GeoCIATTM Modular
heating element kit)
For the electric heating element
kit (option), use the cable clamp
(3)&(4)
Customer supply cable clamp (1) and
omega fastener (2)
20H model

EN
EN - 17
Electrical connection to the board
The customer's main supply cable must be
routed from the rear of the unit via  to the
board 
Customer's main supply
cable routing





RIGHT VIEW
FRONT VIEW
TOP VIEW

EN - 18
groove used for transmitting control
signals (sensors, thermostats, etc.)
Front view
3/4 front view
Detail with top view
Power cable routing next to the expansion
vessels (right-hand side)
Power supply to the heat pump and/or power supply to the 4
kW
GeoCIATTM Modular electric heating element optional kit
3/4 front view
Power cable routing Control cable routing
use of a grommet for the
options (e.g. Geocooling
option kit or control of
BALLON ECS 170L
three-way valve)
WARNING: the power cables MUST follow this route.
To be added as
an option
(e.g. 4kW GeoCIATTM
Modular
heating element kit)
33H and 45H models 33H and 45H models with integrated starter
Customer supply cable clamp (1) and Omega fastener (2)
For the electric heating element kit (option) use the cable clamp (3)
Customer supply cable clamp (1) and Omega fastener (2)
For the electric heating element kit (option) use the cable clamp (3)






45HT models
Customer supply cable clamp (1) and
omega fastener (2)
For the electric heating element kit
(option), use the cable clamp (3) and
the Omega fastener (4)




To be added as an option
(e.g. 4kW GeoCIATTM Modular
heating element kit)