Atlantic Alfea Extensa A.I. Installation and operation manual

Installation
and commissioning
instructions
for professionals
to be kept by the user
for future reference
U0611397_1872_EN_4
15/12/2017
Alféa Extensa A.I.
atlantic-comfort.com
FR NL DE EN IT
ES PT PL PT PT
Air/water heat pump
split 1 service
Outdoor unit Hydraulic unit
WOYA060LFCA 024124
WOYA080LFCA 024125
WOYA100LFTA
WOYG112LHT 024126
WOYG140LCTA
Библиотека СОК 

"Installation
and maintenance regulations
The appliance must be installed and maintained by
an approved professional in accordance with current
regulations and codes of practice.
"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 such pollutants penetrate the
refrigeration circuit, they can a󰀨ect 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 ttings 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 tting in accordance
with industry standard practice for plumbing work:
- Use suitable seals (bre gasket, O-ring).
- Use Teon or hemp tape.
- Use sealing paste (synthetic depending on the case).
Use glycol/water mix if the minimum ow 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.
Remember: The presence at installation of a
CB-type disconnection function, for preventing heating
water being returned to the drinking water system, is
required by articles 16.7 and 16.8 of the Local Plumbing
Regulations.
"In some installations, the presence of di󰀨erent
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.
- Please refer to the chapter "Treatment of domestic
and heating water" in our price catalogue.
"You must also ensure that treated water does
not become corrosive.
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 2 -

• General remarks on electrical connections
It is essential to maintain neutral-phase polarity when
making electrical connections.
Rigid wires are preferable for xed 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.
• 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 rmly onto the loop created.
Insu󰀩cient tightening can cause overheating, leading
to breakdown or even re.
Rigid wire Loop
25 mm Spade
or blade
terminal
on exible
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 10 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
"Electrical connections
• Before any maintenance operation, ensure that
the general power supply is switched o󰀨.
• Specications 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 su󰀩cient 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 39).
The electrical installation must be tted with a 30mA RCD.
This appliance is designed to operate using a nominal
voltage of 230 V +/- 10%, 50 Hz.
Installation manual "1872 - EN" - 3 -
Alféa Extensa A.I. Heat Pump

Contents
Packing . . . . . . . . . . . . . . . . . . . . . . . .6
Unpacking and supplies . . . . . . . . . . . . . . . . 6
Denitions . . . . . . . . . . . . . . . . . . . . . . . 6
General characteristics . . . . . . . . . . . . . . . .7
Description. . . . . . . . . . . . . . . . . . . . . . 14
Operating principle . . . . . . . . . . . . . . . . . 16
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Installation of refrigeration connections . . . . . . . 18 Installation of the outdoor unit . . . . . . . . . . . . 20
Installation of the hydraulic unit . . . . . . . . . . . 22
Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Cable dimensions and protection rating . . . . . . . 39
Electrical connections on the outdoor unit side . . . 40
Electrical connections on the hydraulic unit side . . 42
Outdoor sensor . . . . . . . . . . . . . . . . . . . 44
Room sensor (option) . . . . . . . . . . . . . . . . 44
Controller Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
User Interface . . . . . . . . . . . . . . . . . . . . 48
Display Description . . . . . . . . . . . . . . . . . 49
Installer Menu . . . . . . . . . . . . . . . . . . . . 50
Navigating the Menus . . . . . . . . . . . . . . . . 50
Modifying Settings . . . . . . . . . . . . . . . . . . 51
Temperature control . . . . . . . . . . . . . . . . . 52
This appliance must be installed by qualied personnel holding a certicate of competence in the handling
of refrigerants.
Description of the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Refrigeration connections and lling the installation with gas . . . . . . . 24
Rules and precautions. . . . . . . . . . . . . . . . 24
Shaping the refrigeration pipes . . . . . . . . . . . 24
Checks and connection . . . . . . . . . . . . . . . 27
Filling the installation with gas. . . . . . . . . . . . 28
Hydraulic connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Connecting the hydraulic unit to the heating circuit . 34
Filling and bleeding the installation . . . . . . . . . 35
Heating circulation pump speed settings . . . . . . 36
Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 4 -

Basic Hydraulic Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Electrical Cabling Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Fault Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Faults in the hydraulic unit. . . . . . . . . . . . . . 80 Faults in the outdoor unit . . . . . . . . . . . . . . 81
Maintenance of the installation . . . . . . . . . . . . . . . . . . . . . . . . 82
Checking the hydraulic circuit . . . . . . . . . . . . 82
Checking the outdoor unit . . . . . . . . . . . . . . 82
Checking the electrical circuit . . . . . . . . . . . . 82
Other maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Emptying the hydraulic unit . . . . . . . . . . . . . 83 Distribution valve . . . . . . . . . . . . . . . . . . 83
Quick-start procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Start-up check-list . . . . . . . . . . . . . . . . . . 84 Commissioning technical datasheet. . . . . . . . . 86
ErP performance gures. . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Controller Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Menu Structure . . . . . . . . . . . . . . . . . . . 54
Installed options . . . . . . . . . . . . . . . . . . . 55
Hydraulic conguration . . . . . . . . . . . . . . . 55
Heat Pump Conguration . . . . . . . . . . . . . . 60
System status . . . . . . . . . . . . . . . . . . . . 62
Auxiliary functions . . . . . . . . . . . . . . . . . . 64
Settings . . . . . . . . . . . . . . . . . . . . . . . 66
Easy Start . . . . . . . . . . . . . . . . . . . . . . 70
Denition of ErP . . . . . . . . . . . . . . . . . . . 88
ErP specication. . . . . . . . . . . . . . . . . . . 88
Package datasheet . . . . . . . . . . . . . . . . . 90
Instructions for the end user . . . . . . . . . . . . . . . . . . . . . . . . . 91
Installation manual "1872 - EN" - 5 -
Alféa Extensa A.I. Heat Pump

1.1 Packing
• 1 package: Outdoor unit.
• 1 package: Hydraulic unit and outdoor temperature
sensor.
1.2 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.
1.3 Denitions
- 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 signicant
amounts of current at start-up.
- COP (Coe󰀩cient of Performance): This is the
relationship between the energy transmitted to the
heating circuit and consumed electrical energy.
1 Description of the equipment
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 6 -
Packing contents list
Heat Pump Outdoor unit Hydraulic unit
Model Export
code Reference Code Reference Code
Alféa Extensa A.I. 5 526230 WOYA060LFCA 700171 Alféa Extensa A.I. 5 024124
Alféa Extensa A.I. 6 526231
Alféa Extensa A.I. 6-8-10 024125
Alféa Extensa A.I. 8 526232 WOYA080LFCA 700172
Alféa Extensa A.I. 10 526233 WOYA100LFTA 700173
Alféa Extensa A.I. 13 526234 WOYG112LHT 700179 Alféa Extensa A.I. 13-16 024126
Alféa Extensa A.I. 16 526235 WOYG140LCTA 700175
Optional equipment
• Dual circuit kit (code 074025)
for connecting 2 heating circuits.
• Electrical back-ups kit (code 074044)
• DHW kit (code 073991)
for connecting a mixed DHW tank
(with built-in electrical backups).
• Boiler connection kit (code 073989)
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 ow rate circulation pump kit (code 074077)
for the installation of 1 underoor heating circuit.
• Anti-vibration blocks (code 523574).
• White PVC oor support (ref. 809532) or
Black rubber oor support (ref. 809536).
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* (provided that it is
combined with a mixed DHW tank),
- Cooling in summer* (for underoor heating-cooling
system or fan-convectors).
*: These options require the use of additional kits (see chapter
"Required accessory" or "Optional equipment").

1.4 General characteristics
Model name Alféa Extensa A.I. 5 6 8 10 13 16
Rated heating performances (outdoor temp. / ow temp.)
Heat output
+7°C/+35°C - Underoor heating system kW 4.50 6.00 7.50 10.00 14.01 16.06
-7°C/+35°C - Underoor heating system kW 4.10 4.60 5.70 7.40 9.45 12.93
+7°C/+45°C - LT radiator kW 4.50 5.10 6.20 8.27 10.43 13.60
-7°C/+45°C - LT radiator kW 4.10 4.45 5.05 7.40 9.25 11.20
+7°C/+55°C - Radiator kW 4.50 4.50 5.00 7.00 7.84 10.03
-7°C/+55°C - Radiator kW 3.70 3.85 5.20 7.00 7.29 8.65
Power consumption
+7°C/+35°C - Underoor heating system kW 1.00 1.41 1.84 2.49 3.50 4.37
-7°C/+35°C - Underoor heating system kW 1.47 1.74 2.23 2.97 3.92 5.32
+7°C/+45°C - LT radiator kW 1.31 1.50 1.87 2.53 3.19 4.38
-7°C/+45°C - LT radiator kW 1.86 2.04 2.47 3.70 4.38 5.22
+7°C/+55°C - Radiator kW 1.79 1.79 1.94 2.86 3.25 4.01
-7°C/+55°C - Radiator kW 2.20 2.33 3.34 4.15 4.45 5.20
Coe󰀩cient of Performance (COP) (+7°C/+35°C) 4.52 4.26 4.08 4.02 4.00 3.68
Electrical specications
Electrical voltage (50 Hz) V 230
Maximum current for appliance A 11 12.5 17.5 18.5 22 25
Nominal current A 4.5 6.3 8.1 10.9 11.4 14.2
Maximum current of the Heating system electrical backup (option) A 13.05 / 26.1
Power of the Heating system electrical backup (option) kW 6 kW
Fan actual power consumption W 49 49 49 100 2 x 100 2 x 100
Circulation pump actual power consumption W 24 24 24 24 39.5 39.5
Maximum power consumed by the outdoor unit W 2530 2875 4025 4255 5060 5750
Rate according to EN14825 0.0100 0.0070 0.0057 0.0044 0.0038 0.0029
Hydraulic Circuit
Maximum operating pressure MPa (bar) 0.3 (3)
Flow rate of the hydraulic circuit for 4°C<Δt<8°C
(rated conditions) minimum / maximum l/h 490/980 650/1300 810/1620 1080/2160 1380/2760 1720/3450
Miscellaneous
Weight of outdoor unit Kg 41 41 42 60 92 92
Noise level 1at 1 metre (hydraulic unit) dB (A) 39
Sound power level in accordance with EN 12102 2(hydraulic unit) dB (A) 46
Noise level 1at 1 metre (outdoor unit) dB (A) 41 41 47 47 47 48
Sound power level in accordance with EN 12102 2(outdoor unit) dB (A) 63 63 69 69 69 70
Weight of hydraulic unit (empty / full of water) Kg 42 / 58
Hydraulic unit water capacity l 16
Heating system operating limits
Outdoor temperature min/max °C -20 / +35 -20 / +35 -20 / +35 -20 / +35 -25 / +35 -25 / +35
Underoor heating system max. heating ow water temperature °C 45
LT radiator max. heating ow water temperature °C 55 55 55 55 55 55
Min. ow water temperature °C 8
Refrigeration circuit
Gas pipe diameters Inches 1/2 1/2 5/8 5/8 5/8 5/8
Liquid Piping Diameters Inches 1/4 1/4 1/4 3/8 3/8 3/8
Factory ll of refrigerant R410A 3g 1100 1100 1400 1800 2500 2500
Maximum operating pressure MPa (bar) 4.15 (41.5)
Minimum / Maximum length of pipes 4m 5 /15 5 /15 5 /15 5 /15 5 /15 5 /15
Maximum length of pipes 5/ Maximum level di󰀨erence m 30 / 20 30 / 20 30 / 20 30 / 20 20 / 15 20 / 15
1 Hydraulic unit: Sound pressure level at (x) m from the appliance, 1.5m o󰀨 the ground,
open eld directionality 2 / Outdoor unit : Sound pressure level at (x) m from the device,
halfway between the ground and top of the outdoor unit, open eld directionality 2.
2
The 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.
5 Taking into account a possible additional ll of refrigerant R410A
(see "Additional lling", page 31).
Installation manual "1872 - EN" - 7 -
Alféa Extensa A.I. Heat Pump

gure 1 - Dimensions in mm
650
AIR
AIR
370
830
21
196
99
9
900 77
12
33031
147
170
400
540
4 holes Ø11
62
790
290
18 23
209
352
620
320
16
110
175
AIR
AIR
4 holes ø11
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 8 -
"Outdoor Unit,
Alféa Extensa A.I. 5, 6 and 8
"Outdoor Unit,
Alféa Extensa A.I. 10

gure 2 - Dimensions en mm
31 7790033012
9
400
650
Air
Orifice d’écoulement(Ø 20) 4 trousØ12
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
"Outdoor Unit,
Alféa Extensa A.I. 13 & 16
4 holes Ø 12
Sight of lower part
Side view
Top view
Front view
Overow hole (Ø 20)
Installation manual "1872 - EN" - 9 -
Alféa Extensa A.I. Heat Pump

448
9896 477
81
842
804
Heating return
ø M 26x34
Heating ow
ø M 26x34
Front view Side view
"Hydraulic unit
gure 5 - Dimensions in mm
Space requirements of the hydraulic unit, see page 22.
8
5 6 7
5 Bracket for attaching hydraulic
unit.
6Outdoor sensor to monitor the outdoor
temp.
7* Adapter 1/2" - 5/8" and/
or 1/4" - 3/8" for are connection to
hydraulic unit.
8* Nut 1/2" and/or 1/4"
* only for Alféa Extensa A.I. 5, 6 and 8.
gure 4 - Accessories provided
with the hydraulic unit
gure 3 - Accessories provided
with the outdoor unit
1* Elbow
for condensate evacuation.
2*
Plugs (x2)
(depending on
model)
* only for Alféa Extensa A.I. 10, 13 & 16.
1* 2*
3**
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 10 -


Installation manual "1872 - EN" - 11 -
Alféa Extensa A.I. Heat Pump

gure 6 - Available hydraulic pressures and ow rates (Alféa Extensa A.I. 5, 6, 8 & 10)
-50
1000
10000
43907
2490
338
-25025 50 75 °C
°C
0
2500
5000
7500
10000
12500
15000
17500
20000
22500
25000
27500
30000
32500
0102030405060708090 100
B3977
Outside sensor QAC34
HP return sensor.
HP ow sensor.
gure 7 - Ohmic sensor values (Hydraulic unit)
0
1
2
3
4
5
6
7
8
mCE
1 mbar=10 mmCE=100 Pa
m/h
3
11,5 20,50
1
3
55
77
0
1
2
3
4
5
6
7
8
mCE
1 mbar=10 mmCE=100 Pa
m/h
3
11,5 20,50
1
3
55
77
Variable pressure Constant pressure
gure 8 - Available hydraulic pressures and ow rates (Alféa Extensa A.I. 13 & 16)
0
1
2
3
4
5
6
7
8
mCE
1 mbar=10 mmCE=100 Pa
m/h
3
11,5 20,50
0 0,5 1 1,5 2 m3/h
1
3
55
77
88
0
1
2
3
4
5
6
7
8
mCE
1 mbar=10 mmCE=100 Pa
m/h
3
11,5 20,50
0 0,5 1 1,5 2 m3/h
1
3
55
77
88
Variable pressure Constant pressure
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 12 -

gure 9 - 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 unit.
Temperature °C
Ohmic value (kΩ)
Installation manual "1872 - EN" - 13 -
Alféa Extensa A.I. Heat Pump

Key:
1 - High performance and low noise impeller.
2 - Electrical motor with variable "inverter" operation.
3 - "Inverter" control unit.
4 - Connection terminal blocks
(power supply and interconnection).
5 - Refrigerant storage bottle.
6 - 4-way valve.
7 - Anti-corrosion treated bodywork.
8 - Main circuit electronic expansion valve.
9 - Noise and thermally insulated "inverter" compressor.
10 - Refrigeration connection valves (ared connectors)
with protective caps.
11 - Holding tank with condensate drain hole.
12 - High-performance exchange surface evaporator;
anti-corrosion treated hydrophilic aluminium ns and
grooved copper tubes.
13 - "Inverter" control unit.
14 - Solenoid valve for liquid injection.
15 - Electric expansion valve for liquid injection.
1.5 Description
gure 10 - Outdoor unit components
1
234
6
5
8
10
9
1211
7
1
2
34
6
5
10
9
1211
7
8
1
23
4
6
5
8
10
9
1211
7
"Alféa Extensa A.I. 5 et 6
"Alféa Extensa A.I. 10
"Alféa Extensa A.I. 8
"Alféa Extensa A.I. 13 et 16
1
2
3
4
5
6
7
8
9
10
11
12
13 14
15
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 14 -

gure 11 - Hydraulic unit components
Installation manual "1872 - EN" - 15 -
Alféa Extensa A.I. Heat Pump
Key:
1 - Electric box.
2 - Controller / User interface.
3 - Start/stop switch.
4 - Heating circulation pump.
5 - Heating ow.
6 - "Gas" refrigeration connection.
7 - "Liquid" refrigeration connection.
8 - Heating return.
9 - Drain valve.
10 - Safety valve.
11 - Pressure gauge.
12 - Manual bleeder valve.
13 - Expansion vessel.
14 - Condenser.
2
1
411 3
7
6
58
9
10
13
14
12

1.6 Operating principle
The heat pump transmits the energy contained in the
surrounding air into the dwelling to be heated.
The heat pump consists of four main elements, in which
a refrigerant (R410A) circulates.
- In the evaporator (ref. 12, gure 10, page 14):
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 -20°C outside temperature).
- In the compressor (ref. 9, gure 10, page 14):
The vaporised refrigerant is pressurised and takes on
even more calories.
- In the condenser (ref. 14, gure 11, page 15):
The energy of the refrigerant is transmitted to the
heating circuit. The refrigerant returns to its liquid state.
- In the expansion valve (ref. 8, gure 10, page 14):
The liqueed 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 tted with an electrical backup or
boiler connection* which intervenes to provide additional
heat during the coldest periods.
• Control functions
- The heating circuit's ow temperature is controlled by
the temperature control.
- Depending on the heating ow 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,
management of the DHW circulation pump.
- Managing cooling*.
* Where the heat pump is tted with options and associated kits.
• Protective functions
- Anti-legionella cycle for domestic hot water.
- Frost protection: Frost protection cuts in if the heating
circuit's ow 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 510152025
46
Dwelling heat loss (kW)
Outdoor temperature (°C)
Outdoor temperature (°C)
HP power
gure 12 - Examples and operating limits
Max
authorised HP
start-up temp.
Water return temperature (°C)
HP only
Heat Pump
HP +
electrical
backup
Backup
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 16 -

gure 13 - Heat pump operating principle
• 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 heating and 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.
Depending on the setting, the comfort temperature can
be reached 24h/day or only at night or following the
DHW program.
If the contract signed with the energy provider includes
a day/night tari󰀨, the electrical backup is subject to the
supplier’s power tari󰀨 and 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.
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
Installation manual "1872 - EN" - 17 -
Alféa Extensa A.I. Heat Pump

2.1 Installation of refrigeration connections
"Bend the pipes into position and make holes
for them through the oor 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 outdoor unit must be connected to the hydraulic unit
only with brand new separately insulated copper
connections (refrigerant quality).
Maintain the same pipe diameters (gure 21).
Observe the maximum and minimum distances
between the hydraulic unit and the outdoor unit
(gure 21, page 26); the guarantee of performance
and the service lifespan of the system depend on this.
The minimum length of the refrigeration connections
for correct operation is 5 m.
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.
gure 14 - Example of recommendation
for layout of refrigeration connections
2 Installation
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 18 -


Installation manual "1872 - EN" - 19 -
Alféa Extensa A.I. Heat Pump

2.2 Installation of the outdoor unit
2.2.1 Installation precautions
"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 (gure 15).
• 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 (gure 15).
• 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 signicant dirt or owing water (under a
defective gutter for example).
• Water may ow 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 (see gure 16).
• Nothing should obstruct the air circulation through the
evaporator and out from the fan (gure 15).
• Keep the outdoor unit away from heat sources and
ammable 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).
gure 15 - Minimum installation clearances around the outdoor unit
600 mm
or more
100 mm
or more
250 mm or more
(Service space)
100 mm
or more
300 mm
or more
600 mm or more
250 mm
or more
250 mm
or more 300 mm
or more
600 mm or more
100 mm
or more
100 mm
or more
300 mm or more
(Service space)
300 mm
or more
"Alféa Extensa A.I. 5, 6 and 8
"Alféa Extensa A.I. 10
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Minimum
Installation manual "1872 - EN"
Alféa Extensa A.I. Heat Pump
- 20 -