Atlantic WOYG112LHT User manual

U0611772_1879_EN_14
02/02/2023
For professionals.
To be kept by the user for future reference
EN
Outdoor unit
WOYG112LHT
WOYG140LCTA
WOYK112LCTA
WOYK140LCTA
WOYK160LCTA
Hydraulic unit
024116
024117
INSTALLATION
Alféa Excellia Duo A.I.
Air/water heat pump split 2 services
Heat pumps & boilers

■Installation and maintenance rules
The appliance must be installed and maintained
by an approved professional in accordance with
current regulations and codes of practice.
• Warning, hydraulic unit should not be installed
in an air current.
■Handling
The outdoor unit must not be placed in a horizontal
position during transport.
If not kept upright during transport, the appliance
could be damaged through displacement of
the refrigerant and damage to the compressor
suspension.
Any damage caused by transportation in a horizontal
position is not covered by the warranty.
If necessary, the outdoor unit may be tilted only
during manual handling (to go through a door or up
a staircase). This operation must be conducted very
carefully and the appliance must be immediately
restored to the upright position.
■Containment of refrigeration circuits
All refrigeration circuits are sensitive to
contamination from dust and moisture. If any such
pollutants penetrate the refrigeration circuit, they
can affect the reliability of the heat pump.
Make sure that the connections and refrigeration
circuits (hydraulic unit, outdoor unit) are
protected correctly.
In the event of a subsequent failure and following
an inspection, the presence of moisture or
foreign bodies in the compressor oil would
automatically void the warranty.
- Check upon receipt that the fittings and refrigeration
circuit caps mounted on hydraulic unit and outdoor
unit are properly seated and secured (cannot be
loosened with bare hands). If this is not the case,
tighten them using a C spanner.
- Check also that the refrigeration connections are
sealed (plastic caps or tubes crimped at the ends
and brazed). If the caps must be removed during
the installation (tubes to be re-cut for example),
put them back as soon as possible.
■Hydraulic connections
The connection must comply with industry standard
practice according to current regulations.
Remember: Seal everything when fitting in
accordance with industry standard practice for
plumbing work:
- Use suitable seals (fibre gasket, O-ring).
- Use Teflon or hemp tape.
- Use sealing paste (synthetic depending on the
case).
Use glycol/water mix if the minimum flow
temperature is set below 10°C. If you are using a
glycol/water mix, arrange for an annual check on
the quality of the glycol. Use monopropylene glycol
only. The recommended concentration is 30%
minimum. Never use monoethylene glycol.
• In some installations, the presence of different
metals can cause corrosion problems;
the formation of metal particles and sludge can
appear in the hydraulic circuit.
• In this case, it is advisable to use a corrosion
inhibitor in the proportions indicated by the
manufacturer.
• You must also ensure that treated water does
not become corrosive.

■Electrical connections
• Before any maintenance operation, ensure
that the general power supply is switched off.
• Specifications of electricity supply
The electrical installation must be carried out in
accordance with current regulations.
Electrical connections will only be made once all
other installation operations (fastening, assembly,
etc.) have been completed.
Warning!
The contract signed with the energy provider must
be sufficient not only to cover the heat pump's power
requirements but also the combined sum of all the
appliances likely to be operating at the same time. If
the power is too low, check the power rating stated
in your contract with your energy provider.
Never use a power socket for the power supply.
The heat pump must be supplied directly with power
(without external switch) by special protected leads
from the electric panel via dedicated bipolar circuit
breakers, C curve for the outdoor unit, C curve for
the electrical heating and domestic water backups
(see tables page 35).
The electrical installation must be fitted with a 30mA
RCD.
This appliance is designed to operate using a
nominal voltage of 230 V or 400 V, +/- 10%, 50 Hz .
• General remarks on electrical connections
It is essential to maintain neutral-phase polarity
when making electrical connections.
Rigid wires are preferable for fixed installations,
particularly in a building.
Tighten the cables using the cable glands to prevent
the feed wires from being accidentally disconnected.
The earth connection and its continuity must be
ensured.
• Cable glands
To ensure the stability of power (Low Voltage) and
sensor (Extra-Low Voltage) cables, it is essential
that the cable glands are tightened according to the
following recommendations:
Size of cable
gland (PE)
(mm)
Diameter of
cable
(mm)
Cable gland
tightening
torque
(check-nut)
(N.m)
Coupling net
tightening
torque
(N.m)
PG7 1 to 5 1.3 1
PG9 1.5 to 6 3.3 2.6
PG16 5 to 12 4.3 2.6
• Connecting to screw terminals
The use of ring, spade or blade terminals or
caps is prohibited.
- Always select wire that complies with current
standards.
- Bare the end of the wire to around 25 mm.
- With round end pliers, form a loop with a diameter
which matches the tightening screws on the
terminal.
- Tighten the terminal screw firmly onto the
loop created. Insufficient tightening can cause
overheating, leading to breakdown or even fire.
Rigid wire Loop
25 mm Spade
or blade
terminal
on flexible
wire
is prohibited
Screw and special
washer
Terminal
• Connecting to controller boards
- Remove the corresponding connector and make
the connection.
Pre-cabled bundle connector and/or screw connector
• Connecting to spring terminals
- Bare the end of the wire to around 12 mm.
- Push the spring with a screwdriver so that the wire
enters the cage.
- Slide the wire into the opening provided for this
purpose.
- Remove the screwdriver and then check that the
wire stays gripped by the cage by pulling on it.
2
1
3
1
3
2
4

Contents
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Unpacking and supplies . . . . . . . . . . . . . . . . . . . . 6
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General characteristics . . . . . . . . . . . . . . . . . . . . . 7
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Operating principle . . . . . . . . . . . . . . . . . . . . . . . 14
Installation 16
Installation of refrigeration connections. . . . . . . . 16 Installation of the outdoor unit . . . . . . . . . . . . . . . 18
Installation of the hydraulic unit . . . . . . . . . . . . . . 20
 Electrical connections 34
Cable dimensions and protection rating . . . . . . . 35
Electrical connections on the single phase outdoor
unit side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Electrical connections on the 3 phase outdoor unit
side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Electrical connections on the hydraulic unit side . . 38
Outside sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Room sensor (option) . . . . . . . . . . . . . . . . . . . . . 42
 Description of the equipment 6
 Commissioning 44
User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Display Description . . . . . . . . . . . . . . . . . . . . . . . 47
Installer Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Navigating the Menus . . . . . . . . . . . . . . . . . . . . . 48
Modifying Settings . . . . . . . . . . . . . . . . . . . . . . . . 49
Temperature control . . . . . . . . . . . . . . . . . . . . . . 50
 Refrigeration connections 21
Rules and precautions. . . . . . . . . . . . . . . . . . . . . 21
Shaping the refrigeration pipes . . . . . . . . . . . . . . 21
Checks and connection . . . . . . . . . . . . . . . . . . . . 23
Filling the installation with gas. . . . . . . . . . . . . . . 24
 Hydraulic connections 28
Connecting the hydraulic unit to the heating circuit. . 28
Connecting to the DHW circuit . . . . . . . . . . . . . . 30
Filling and bleeding the installation . . . . . . . . . . . 31
Heating circulation pump speed settings. . . . . . . 32
 Controller Interface 46
This appliance must be installed by qualified personnel holding a certificate of competence in the
handling of refrigerants.
- 4 - alfea Extensa Duo A.I. / Installation / 1879 - EN

 Controller Menu 52
Basic Hydraulic Layout 70
Electrical Cabling Plans 72
Faults in the Hydraulic Unit . . . . . . . . . . . . . . . . . 76 Faults in the outdoor unit. . . . . . . . . . . . . . . . . . .77
 Maintenance of the installation 78
Checking the hydraulic circuit . . . . . . . . . . . . . . . 78
Maintenance of the DHW tank . . . . . . . . . . . . . . 78
Checking the outdoor unit . . . . . . . . . . . . . . . . . . 78
Checking the refrigeration circuit :. . . . . . . . . . . . 78
Checking the electrical circuit . . . . . . . . . . . . . . . 78
 Other maintenance 79
Emptying the hydraulic unit . . . . . . . . . . . . . . . . . 79
Distribution valve . . . . . . . . . . . . . . . . . . . . . . . . . 79
ACI check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Start-up procedure 80
Start-up check-list . . . . . . . . . . . . . . . . . . . . . . . . 80 Commissioning technical datasheet . . . . . . . . . . 82
 Instructions for the end user 83
Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Installed options . . . . . . . . . . . . . . . . . . . . . . . . . 53
Hydraulic configuration . . . . . . . . . . . . . . . . . . . . 53
Heat Pump Configuration . . . . . . . . . . . . . . . . . . 58
System status . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Auxiliary functions . . . . . . . . . . . . . . . . . . . . . . . . 62
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Easy Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
 Fault Diagnosis 76
- 5 -
alfea Extensa Duo A.I. / Installation / 1879 - EN

 Description of the equipment
►
Definitions
- Split: The heat pump consists of two elements
(an outdoor unit to be installed outdoors and a hydraulic
unit to be installed inside the dwelling).
- Air/water: The surrounding air is the energy source.
This energy is transmitted to the heating circuit water
by the heat pump.
- Inverter: The fan and compressor speeds are
modulated according to the heating requirements.
This technology enables you to save on energy and
operate on a single-phase power supply, whatever
the heat pump's output, by avoiding pulling significant
amounts of current at start-up.
- COP (Coefficient of Performance): This is the
relationship between the energy transmitted to the
heating circuit and consumed electrical energy.
►
Packing
• 1 package: Outdoor unit.
• 1 package: Hydraulic unit and outside temperature
sensor.
►
Unpacking and supplies
While the courier is still present, carefully check the
general appearance of the appliances and check
that the outdoor unit has not been laid in a horizontal
position.
In the event of a dispute, send any relevant reservations
to the carrier in writing within 48 hours and send a copy
of the letter to Customer Services.
- 6 - alfea Extensa Duo A.I. / Installation / 1879 - EN
Packing contents list
Heat Pump Outdoor unit Hydraulic unit
Model Inter. Ref. Code Ref. Code
Alféa Excellia Duo A.I. 11 526355 WOYG112LHT 700197 Alféa
Excellia Duo A.I.
single phase
024116
Alféa Excellia Duo A.I. 14 526356 WOYG140LCTA 700175
Alféa Excellia Duo A.I. tri 11 526357 WOYK112LCTA 700176 Alféa
Excellia Duo A.I.
3-phase
024117Alféa Excellia Duo A.I. tri 14 526358 WOYK140LCTA 700177
Alféa Excellia Duo A.I. tri 16 526359 WOYK160LCTA 700178
▼
Operating Range
This heat pump provides:
- Heating in winter,
- The management of electrical backups, for extra
heating on the coldest days,
or
- Installation with boiler connection* for extra heating on
the coldest days,
- Management of two heating circuits*,
- Production of domestic hot water.
- Cooling in summer* (for underfloor heating-cooling
system or fan-convectors).
*: These options require the use of additional kits (see
chapter "Required accessory" or "Optional equipment").
▼
Optional equipment
• Dual circuit kit (code 570629 (074011 + 075311))
for connecting 2 heating circuits.
• Boiler connection kit (code 073990)
for connecting a boiler to the heat pump.
• Wireless room sensor A59 (code 074208) for
correcting the ambient temperature.
• Wireless room sensor A75 (code 074213),
Wireless room sensor A78 (code 074214)
for correcting the ambient temperature and
programming the heat pump.
• Cooling kit (code 075328).
• High flow rate circulation pump kit (code 074077)
for the installation of 1 underfloor heating circuit.
• Anti-vibration blocks (code 523574).
• White PVC floor support (ref. 809532) or
Black rubber floor support (ref. 809536).

►
General characteristics
Model name Alféa Excellia Duo A.I. 11 14 tri 11 tri 14 tri 16
Rated heating performances (outdoor temp. / flow temp.)
Heat output
+7°C/+35°C - Underfloor heating system kW 10.80 13.50 10.80 13.00 15.17
-7°C/+35°C - Underfloor heating system kW 10.38 11.54 10.38 12.20 12.98
+7°C/+55°C - Radiator kW 7.59 9.48 9.29 10.60 12.24
-7°C/+55°C - Radiator kW 7.57 9.20 9.27 10.10 12.00
Power consumption
+7°C/+35°C - Underfloor heating system kW 2.54 3.23 2.51 3.11 3.70
-7°C/+35°C - Underfloor heating system kW 4.32 5.08 4.28 5.13 5.40
+7°C/+55°C - Radiator kW 3.07 3.95 3.52 4.40 4.93
-7°C/+55°C - Radiator kW 4.57 5.08 5.09 5.65 6.89
Coefficient of Performance (COP) (+7°C/+35°C) 4.25 4.18 4.30 4.18 4.10
Electrical specifications
Electrical voltage (50 Hz) V230 400
Maximum current for appliance A22 25 8.5 9.5 10.5
Nominal current A11.4 14.2 3.7 4.8 5.5
Maximum current of the Heating system electrical backup A13.05 / 26.1 3x13
Power of the Heating system electrical backup kW 6 kW (single phase) 9 kW (3 phase)
Circulation pump actual power consumption W39.5
Maximum power consumed by the outdoor unit W5060 5750 5865 6555 7245
DHW electrical backup power W1500
Rate according to EN14825 0.0049 0.0039 0.0066 0.0053 0.0045
Hydraulic Circuit
Maximum operating pressure heating / hot water tank MPa (bar) 0.3 (3) / 1 (10)
Flow rate of the hydraulic circuit for 4°C<Δt<8°C
(rated conditions) minimum / maximum l/h 1170/2340 1460/2920 1170/2340 1390/2790 1650/3290
Miscellaneous
Weight of outdoor unit Kg 92 99
Weight of hydraulic unit (empty / full of water) Kg 152 / 370
Water capacity of the hydraulic unit / hot water tank l24 / 190
Noise level at 1 m 1(hydraulic unit) dB (A) 39
Sound power level in accordance with EN 12102 2(hydraulic unit) dB (A) 46
Noise level at 5 m 1(outdoor unit) dB (A) 47 48 46 47 48
Sound power level in accordance with EN 12102 2(outdoor unit) dB (A) 69 69 68 69 69
Heating system operating limits
Outdoor temperature min/max °C -25 / +35
Max. heating water flow temperature underfloor heating °C 45
Max. heating water flow temperature low temperature radiator °C 60
Refrigeration circuit
Gas pipe diameters Inches 5/8
Liquid Piping Diameters Inches 3/8
Factory fill of refrigerant R410A 3g 2500
Maximum operating pressure MPa (bar) 4.15 (41.5)
Minimum / Maximum length of pipes 4 / 6 m 5 / 15
Maximum length of pipes 5/ Maximum level difference m 20 / 15
1Sound pressure level at (x) m from the appliance, 1.5m offthe ground,
open field directionality 2.
2The sound power level is a laboratory measurement of the emitted
sound power. It does not correspond to a measurement of the
perceived sound power.
3Refrigerant R410A as per NF EN 378.1 standard.
4Filling with refrigerant R410A is done at the factory.
5Taking into account a possible additional fill of refrigerant R410A
(see "Additional filling", page 26).
6The announced thermal and acoustic performances are measured
with 7,5m length refrigerant lines.
- 7 -
alfea Extensa Duo A.I. / Installation / 1879 - EN

900
1290
9
21
650
370
Air
31 12330
400
Air
Air
31 77900330 12
9
400
650
Air
Orifice d’écoulement (Ø 20) 4 trous Ø 12
Vue de dessus
Vue de face
Vue de dessous
Vue de coté
21
1290
151
170
196
370
99
3/8”
5/8”
Air
Air
fig. 1 - Dimensions in mm
Overflow hole (ø 20) 4 holes (ø12)
Bottom view
Front view
Top view
Side view
Front view
Top view
Side view
4 holesOverflow hole
Bottom view
- 8 - alfea Extensa Duo A.I. / Installation / 1879 - EN
■Outdoor Unit,
Alféa Excellia Duo A.I. 11 and 14
■Outdoor Unit,
Alféa Excellia Duo A.I. tri 11, 14 and 16

175 210
47
1296
648
1141
1190
297 55
244
1841
1851
678
684
71
55
507
144
608 115
1679 1611
fig. 2 - Dimensions in mm
Space requirements of the hydraulic unit, see fig. 15, page 20.
fig. 3 - Accessories provided with the outdoor unit fig. 4 - Accessories provided with the hydraulic unit
1* 2*
1 Elbow
for condensate evacuation
2
Plugs (x2)
(depending on
model)
1 Dielectric connections
for connections to the DHW
circuit
2 DCW pipes
3 Gaskets
4 Outside sensor to monitor the outside
temperature
7 Straight insulators
to insulate connections
and tubes
8 Conical insulators
9 Insulation tape
Back view
Heating flow.
DHW
DCW
Heating return.
Side view Front view
■Hydraulic unit
64
9
5
3
2
8
1
7
- 9 -
alfea Extensa Duo A.I. / Installation / 1879 - EN

fig. 5 - Available hydraulic pressures and flow rates
-50
1000
10000
43907
2490
338
-25 0 25 50 75 °C
°C
0
2500
5000
7500
10000
12500
15000
17500
20000
22500
25000
27500
30000
32500
0 10203040 5060 708090100
B3977
Outside sensor QAC34 HP return sensor
HP flow sensor
fig. 6 - Ohmic sensor values (Hydraulic unit)
Variable pressure
Constant speed
Constant pressure
0
0
1
2
3
4
5
6
7
8
9
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
m3/h
mCE (1 mbar = 10 mmCE = 100 Pa)
0 0,5 1 1,5 2 2,5
I
III
II
0
0
1
2
3
4
5
6
7
8
9
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
m3/h
mCE (1 mbar = 10 mmCE = 100 Pa)
I
II
III
0
0
1
2
3
4
5
6
7
8
9
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
m3/h
mCE (1 mbar = 10 mmCE = 100 Pa)
0 0,5 1 1,5 2 2,5
I
II
III
- 10 - alfea Extensa Duo A.I. / Installation / 1879 - EN

fig. 7 - Ohmic sensor values (Outdoor unit)
-20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
10000
1000
100
10
1
- Compressor.
- Discharge.
- Condensation.
- Expansion valve.
- Evaporator inlet.
- Outdoor
Temperature °C
Ohmic value (kΩ)
- 11 -
alfea Extensa Duo A.I. / Installation / 1879 - EN

►
Description
fig. 8 - Outdoor unit components
Key:
1. High performance and low noise impeller.
2. Electrical motor with variable "inverter" operation.
3. "Inverter" control unit.
4. Check lights and buttons.
5. Connection terminal blocks
(power supply and interconnection).
6. Refrigerant storage bottle.
7. 4-way valve.
8. Anti-corrosion treated bodywork.
9. Main circuit electronic expansion valve.
10. Noise and thermally insulated "inverter" compressor with liquid injection port.
11. Refrigeration connection valves (flared connectors) with protective caps.
12. Holding tank with condensate drain hole.
13. High-performance exchange surface evaporator; anti-corrosion treated hydrophilic aluminium fins and
grooved copper tubes.
14. Solenoid valve for liquid injection.
15. Electronic expansion valve for liquid injection.
1
2
3
4
5
6
7
8
9
10
11
12
13 14
15
2
1
3
4
5
7
9
8
10
12
13
11
14
15
6
- 12 - alfea Extensa Duo A.I. / Installation / 1879 - EN
■Alféa Excellia Duo A.I. 11 and 14 ■Alféa Excellia Duo A.I. tri 11 , 14 and 16

fig. 9 - Hydraulic unit components
Key:
1 - Electric control box.
2 - Controller / User interface.
3 - Start/stop switch.
4 - Hydraulic unit circulation pump.
5 - Distribution valve.
6 - "Gas" refrigeration connection.
7 - "Liquid" refrigeration connection.
8 - Condensation sensor.
9 - Drain valve.
10 - Safety valve.
11 - Safety thermostat.
12 - Pressure gauge.
13 - Automatic bleeder valve.
14 - Expansion vessel.
15 - Condenser.
16 - HP electrical backup.
17 - DHW electrical backup.
Sensors:
21 - HP return sensor.
22 - DHW sensor.
23 - HP flow sensor.
3
12
1
10
4
9
8
21 23
14
5
17
22
16
11
9
9
215
13
67
- 13 -
alfea Extensa Duo A.I. / Installation / 1879 - EN

►
Operating principle
The heat pump transmits the energy contained in the
surrounding air into the dwelling to be heated and for
production of domestic hot water.
The heat pump consists of four main parts, in which a
refrigerant (R410A) circulates.
- In the evaporator (ref. 13, fig. 8, page 12):
The calories are taken from the outside air and
transmitted to the refrigerant. Because it has a low
boiling point, it changes from a liquid to a vapour, even
in cold weather (down to -25°C outside temperature).
- In the compressor (ref. 10, fig. 8, page 12):
The vaporised refrigerant is pressurised and takes on
even more calories.
- In the condenser (ref. 15, fig. 9):
The energy of the refrigerant is transmitted to the
heating circuit. The refrigerant returns to its liquid state.
- In the expansion valve (ref. 9, fig. 8, page 12):
The liquefied refrigerant is returned to a low pressure
and regains its initial temperature and pressure.
The heat pump is equipped with a controller which
controls the room temperature based on the outdoor
temperature measurement. The room thermostat
(option) provides a corrective action for the temperature
control.
The hydraulic unit is fitted with an electrical backup or
boiler connection* which intervenes to provide additional
heat during the coldest periods.
• Control functions
- The heating circuit's flow temperature is controlled by
the temperature control.
- Depending on the heating flow temperature, the
outdoor unit's power is modulated by the "Inverter"
compressor.
- Control of the backup electrical heating.
- The daily timer program is used to set the periods
where the ambient temperature is comfortable or
reduced.
- Summer/winter time mode switchover is automatic.
- Management of the boiler backup*.
- Room sensor*: The room sensor provides a corrective
action for the temperature control.
- Control of a second heating circuit*.
- Domestic hot water: Heating timer program.
- Managing cooling*.
*Where the heat pump is fitted with options and associated kits.
• Protective functions
- Anti-legionella cycle for domestic hot water.
- Anti-corrosion tank protection with titanium anode
(ACI).
- Frost protection: Frost protection cuts in if the heating
circuit's flow temperature falls below 5°C (provided
that the heat pump's electrical power supply is not
interrupted).
8
7
6
5
4
3
2
1
0
-20 -15 -10 -5 0 5 10 15 20 25
46
Dwelling heat loss (kW)
Outdoor temperature (°C)
Outdoor temperature (°C)
HP power
fig. 10 - Examples and operating limits
Max
authorised HP
start-up temp.
Water return temperature (°C)
HP only
Heat Pump
HP +
electrical
backup
Backup
- 14 - alfea Extensa Duo A.I. / Installation / 1879 - EN

• Domestic hot water (DHW) operating principle
Two domestic hot water (DHW) temperatures can be
set: comfort and reduced.
The default DHW program is set to the comfort
temperature between 00:00 and 05:00 and between
14:30 and 17:00 and to the reduced temperature for the
rest of the day. This optimises electrical consumption
while ensuring comfortable water temperatures.
The reduced temperature setpoint may be useful to
avoid restarting the DHW too often and for too long
during the day.
The production of domestic hot water (DHW) is started
when the temperature in the tank drops to 7°C below
the temperature setpoint.
The heat pump produces the domestic hot water, which
is then additionally heated, if required, by the tank's
electrical backup or by the boiler. To ensure a DHW
setpoint over 55°C, the electrical backup heating must
be left on.
fig. 11 - Heat pump operating principle
Ev
Dt
Cn
Cp
1kW
COP 4
4kW
20 °C
PAC
PAC - Heating Pump
Ev - Evaporator
Cp - Compressor
Cn - Condenser
Dt - Expansion Valve
Air energy
Heat produced
Electrical
energy
consumed
If the contract signed with the energy provider includes
a day/night tariff, the electrical backup is subject to the
supplier’s power tariffand the comfort temperature may
only be reached at night.
If no particular contract has been signed, the comfort
temperature can be reached at any time, including
during the day.
The production of DHW takes priority over heating;
nevertheless the production of DHW is managed
by cycles that regulate the amount of time assigned
to heating and production of DHW in the event of
simultaneous demand.
Anti-legionella cycles can be programmed.
• Fan convectors with integrated control system
Do not use a room sensor in the area in question.
- 15 -
alfea Extensa Duo A.I. / Installation / 1879 - EN

Installation
►
Installation of refrigeration
connections
fig. 12 - Example of recommendation for layout of
refrigeration connections
Bend the pipes into position and make holes
for them through the floor or walls either with
their protective caps in place or after brazing.
Keep the protective caps in place or ends
brazed until the appliance is commissioned.
The minimum length of the refrigeration
connections for correct operation is 5 m.
The outdoor unit must be connected to the hydraulic unit
only with brand new separately insulated copper
connections (refrigerant quality).
Maintain the same pipe diameters (fig. 19, page 22).
Observe the maximum and minimum distances between
the hydraulic unit and the outdoor unit (fig. 19, page 22);
the guarantee of performance and the service lifespan
of the system depend on this.
The appliance's warranty will be void if it is operated
with refrigeration connections less than 5 m long
(tolerance +/- 10%).
If the refrigeration connections are exposed to
weathering or UV radiation and the insulation is not
resistant, protection must be provided.
- 16 - alfea Extensa Duo A.I. / Installation / 1879 - EN



• Water may flow out of the outdoor unit when it is
operating. Do not install the unit on a paved terrace;
choose a well-drained location (e.g. gravel or sand).
If installation is carried out in an area where the
temperature stays below 0°C for long periods, check
that the presence of ice does not present any danger.
A drainage pipe can also be connected to the outdoor
unit (fig. 14).
• Nothing should obstruct the air circulation through the
evaporator and out from the fan (fig. 13).
• Keep the outdoor unit away from heat sources and
flammable products.
• Make sure that the unit does not disturb the
surrounding area or inhabitants (noise level, draught,
low temperature of the ejected air freezing the plants
in its path).
fig. 13 - Minimum installation clearances around the outdoor unit (all models)
D
E
G
G
B
D
B
G
A
A
H
C
C
E
E
G
A
F
J
C
CK
F
F
H
C
C
C
C
H
E
D
H
C
C
H
C
CDC
CH
E
A150 mm
B200 mm
C250 mm
D300 mm
E500 mm
F600 mm
G1000 mm
H1500 mm
J2000 mm
K3000 mm
• Choose the location of the appliance after discussion
with the client.
• We recommend choosing a site that is sunny but
sheltered from strong cold prevailing winds.
• The unit must be easily accessible for future installation
and maintenance work (fig. 13).
• Ensure that connections to the hydraulic unit can be
made easily.
• The outdoor unit is able to withstand bad weather but
avoid installing it in a position where it is likely to be
exposed to significant dirt or flowing water (e.g. under
a broken gutter).
The outdoor unit must only be installed
outside. If a shelter is required, it must have
broad openings on all 4 sides and installation
clearances must be observed.
►
Installation of the outdoor unit
▼
Installation precautions
- 18 - alfea Extensa Duo A.I. / Installation / 1879 - EN

• The surface on which the appliance is installed must:
- Be permeable (soil, gravel, etc.),
- Support its weight easily.
- Allow a solid fastening base,
- Not transmit any vibration to the dwelling. Anti-vibratory
blocks are available as an option.
• The wall bracket cannot be used where it is likely to
transmit vibrations. Installing the unit on the ground is
preferred.
▼
Positioning Outdoor Unit
The outdoor unit must be raised at least 50 mm above
ground level. In areas prone to snow, this height should
be increased but should not exceed 1.5 m (fig. 14).
- Fasten the outdoor unit by means of screws and
rubber tightening or toothed lock washers to prevent
them from coming loose.
H
fig. 14 - Installation of the outdoor unit
evacuation of condensates
* In areas with heavy snowfall,
(H) must be higher than the average snow layer.
B
BC
4 holes
(ø 12 mm)
In areas with heavy snowfall, if the intake and
outlet of the outdoor unit is blocked with snow,
heating may become difficult and a failure is
likely to occur.
The outdoor unit can generate a large volume
of water (called condensate).
If installation is carried out in an area where the
temperature stays below 0°C for long periods,
equip the drain pipe with trace heating to
avoid it icing up. Trace heating must heat not
only the drain pipe but also the bottom of the
appliance's condensate collection tank.
Construct a canopy or place the unit on a high stand
(local configuration).
- Place the unit on a solid stand in order to minimise
impacts and vibrations.
- Do not place the unit directly on the ground as this will
cause problems.
▼
Condensate drain pipe
If the use of a drain pipe is necessary:
- Use the elbow provided (C) and connect a 16 mm-diameter
hose for draining the condensate.
- Use the plug(s) provided (B) to block the opening of
the condensate drain pan.
Allow for the condensate to flow away under the force of
gravity (waste water, rain water, gravel bed).
- 19 -
alfea Extensa Duo A.I. / Installation / 1879 - EN

fig. 15 - Minimum installation clearances around the
hydraulic unit and distances away from fuel
storage areas
►
Installation of the hydraulic unit
▼
Installation precautions
• Choose the location of the appliance after discussion
with the client.
• The installation space should comply with current
regulations.
• To facilitate maintenance and to allow access to the
various components, we recommend that you provide
sufficient space all around the hydraulic unit (fig. 15).
• In accordance with EN 378-1 -2017 standard
(Refrigerating systems and heat pumps - Safety and
environmental requirements), the system's hydraulic
unit and all refrigeration connections passing through
inhabited areas must comply with the minimum room
volume requirements shown hereafter.
The minimum volume of a room (in m3) is calculated
using the formula: "fluid fill load" (in kg) / 0.39.
Alternatively, you must ensure that
- the location has natural ventilation through another
room where the combined volume of the two rooms is
greater than "liquid fill load" (in kg) / 0.39 kg/m³. The
opening between the two rooms must have a door
clearance of at least 1 cm.
- or that the location is mechanically ventilated.
Be careful not to bring flammable gas
near the heat pump during installation,
in particular when brazing is required.
The appliances are not fireproof and should
not therefore be installed in an explosive
environment.
To prevent risks of humidity in the exchanger,
it is pressurized with nitrogen.
- To avoid condensation inside the condenser, remove
the refrigeration circuit caps only when making the
refrigeration connections.
- If the refrigeration connection is only performed at the
end of the installation, make sure that the refrigeration
circuit caps* remain in place and tight throughout the
installation.
* (Hydraulic unit side and outdoor unit side).
- After each maintenance operation on the refrigeration
circuit and before the final connection, take care to put
the caps back in position to avoid any pollution of the
refrigeration circuit (sealing with adhesive is prohibited).
fig. 16 - Open the front cover fig. 17 - Removing the cover
1000
1841
300
1
2
3
- 20 - alfea Extensa Duo A.I. / Installation / 1879 - EN