Atlantic Alfea Extensa Duo + 10 User manual

Installation and
operating manual
intended for professionals
To be saved for
future consultation
Document n° 1435-5 ~ 09/12/2011
alféa extensa duo
www.atlantic.fr
Subject to modications without notice.
Non contractual document.
FR NL DE EN EN
ES PT
Heat pump air/water
split 2 services
alféa extensa duo 5
alféa extensa duo 6
alféa extensa duo 8
alféa extensa duo 10

Contents
Package . . . . . . . . . . . . . . . . . . . . . . . . 4
Denitions . . . . . . . . . . . . . . . . . . . . . . . 4
Specications . . . . . . . . . . . . . . . . . . . . . 5
Description. . . . . . . . . . . . . . . . . . . . . . . 9
Operating principle . . . . . . . . . . . . . . . . . 10
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Regulation installation and maintenance conditions . . 12
Unpacking and reservations . . . . . . . . . . . . . 12
Receipt . . . . . . . . . . . . . . . . . . . . 12
Handling . . . . . . . . . . . . . . . . . . . 12
Accessories provided . . . . . . . . . . . . . 12
Installation position . . . . . . . . . . . . . . . . . 12
Installation of the outdoor unit . . . . . . . . . . . . 12
Installation precautions . . . . . . . . . . . . 12
Outdoor unit positioning . . . . . . . . . . . 14
Condensate drain hose . . . . . . . . . . . . 14
Installing the hydraulic unit . . . . . . . . . . . . . 15
Installation precautions . . . . . . . . . . . . 15
Refrigeration connections . . . . . . . . . . . . . . 16
Rules and precautions . . . . . . . . . . . . 16
Refrigeration connections. . . . . . . . . . . 16
Creating the arings . . . . . . . . . . . . . 16
Shaping the refrigeration pipes . . . . . . . . 17
Connecting the ared connections . . . . . . 18
Filling the installation with gas . . . . . . . . . . . . 19
Example of commissioning procedure . . . . 19
Sealing test . . . . . . . . . . . . . . . . . . 19
Hydraulic connecting . . . . . . . . . . . . . . . . 20
General . . . . . . . . . . . . . . . . . . . . 20
Connecting to the DHW circuit . . . . . . . . 21
Rinsing out the installation . . . . . . . . . . 21
Filling and purging the installation . . . . . . 21
Connecting the Fan convector circuit . . . . . 21
Heating circulation pump speed settings . . . . . . 22
Electrical connections . . . . . . . . . . . . . . . . 23
Characteristic of the electrical supply . . . . . 23
General remarks on electrical connections . . 23
Overview of all the electrical connections . . 24
Cable section and protection rating . . . . . . 24
Electrical connections
on the outdoor unit side . . . . . . . . . . . . 25
Electrical connections
on the hydraulic unit side . . . . . . . . . . . 26
Outdoor sensor . . . . . . . . . . . . . . . . . . . 28
Room thermostat and/or room control unit . . . . . 28
Installing a room sensor . . . . . . . . . . . 28
Installing a room control unit . . . . . . . . 28
Commissioning . . . . . . . . . . . . . . . . . . . 28
Conguring room thermostat T55 . . . . . . . . . . 29
Conguring room control unit (T75 or T78) . . . . . 29
Description of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
"This device requires for its installation, the intervention of qualied personnel with a certicate of
capacity for handling refrigerants.
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 2 -

Regulation system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
User interface, Room control unit (option)
and Room thermostat (option) . . . . . . . . . . . . 30
Description of the display . . . . . . . . . . . . . . 32
Temperature control . . . . . . . . . . . . . . . . . 32
Set to . . . . . . . . . . . . . . . . . . . . . 32
Parametering the setting . . . . . . . . . . . . . . 34
General . . . . . . . . . . . . . . . . . . . . 34
Setting parameters . . . . . . . . . . . . . . 34
List of function lines (settings, diagnosis, status) . . 34
Overall hydraulic layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Electrical wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Faults displayed on the hydraulic unit . . . . . . . . 51
Faults displayed on the outdoor unit. . . . . . . . . 52
Maintenance of the installation . . . . . . . . . . . . . . . . . . . . . . . . 54
Emptying the DHW tank . . . . . . . . . . . . . . . 54
Maintenance of the DHW tank. . . . . . . . . . . . 54
Quick-start procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Start-up check-list . . . . . . . . . . . . . . . . . . 55
Before starting-up . . . . . . . . . . . . . . . . . . 55
Instructions for the user . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Information display . . . . . . . . . . . . . . . . . 53
Emptying the hydraulic unit . . . . . . . . . . . . . 54
Distribution valve . . . . . . . . . . . . . . . . . . 54
Commissioning and quick setup of the system . . . 56
Starting-up . . . . . . . . . . . . . . . . . . 56
Settings sheet . . . . . . . . . . . . . . . . . . . . 57
Start-up data sheet . . . . . . . . . . . . . . . . . 58
Installation and operating manual "1435 - EN" - 3 -
Heat Pump alféa extensa duo

1 Description of the unit
1.1 Package
• 1 package: outdoor unit.
• 1 package: hydraulic unit and outdoor sensor.
1.2 Denitions
- Split: The heat pump consists of two elements
(an outdoor unit for outdoor and a hydraulic unit for
inside the dwelling).
- Air/water: The surrounding air is the energy source.
This energy is transmitted to the water in the heating
circuit 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 heavy intensities on
start-up.
- COP (coefcient of performance): this is the relationship
between the energy transmitted to the heating circuit
and electrical energy consumed.
Packing list
Heat pump (HP) Outdoor unit Hydraulic unit
Model Code Model Code Model Code
alféa extensa duo 5 522893 AOYA18LALL 700718 MH extensa duo 5 023158
alféa extensa duo 6 522894 MH extensa duo 6 023142
alféa extensa duo 8 522895 AOYA30LBTL 700730 MH extensa duo 8 023158
alféa extensa duo 10 522896 AOYA36LBTL 700736 MH extensa duo 10 023142
Scope of application
This heat pump provides:
- Heating in winter,
- Control of two heating circuits*,
- Production of domestic hot water (provided that
combined with a DHW tank).
- Installation with boiler connection* as a
supplementary heating for the coldest days.
or
- the addition of electrical back-ups*, for extra heating
on the coldest days.
- Cooling in summer* (for oor heating-cooling system
or fan-convectors).
- Heating the swimming pool*.
* : These options require the use of additional kits
(see para "Optional equipment").
Optional equipment
• 2nd circuit kit (code 074011)
- for connecting 2 heating circuits.
• Regulation extension kit (code 075311)
- to manage a 2nd heating circuit, swimming pool etc...
• Boiler connection kit (code 073990)
- for connecting a boiler to the heat pump.
• Electrical back-ups kit (code 073985).
• Room thermostat T37 (code 075308),
Room thermostat T55 (code 073951)
- for correcting the ambient temperature.
• Room control unit T75 (code 073954),
Room control unit radio T78 (code 074061)
- for correcting the ambient temperature and
programming the heat pump.
• Anti-vibration blocks (code 523574).
• White PVC oor support (code 809532) or
Black rubber oor support (code 809536).
• Swimming pool kit (code 074726).
• Cooling kit (code 075312).
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 4 -

Designation model alfea extensa duo 5 6 8 10
Nominal heating performances (outdoor temperature/ initial temperature)
Heat output
+7 °C / +35 °C - Floor heating system kW 4,70 6,00 7,71 10,56
-7 °C / +35 °C - Floor heating system kW 4,71 5,03 6,55 8,31
+7 °C / +45 °C - Low temperature radiator kW 4,27 5,68 7,23 8,10
-7 °C / +45 °C - Low temperature radiator kW 4,10 4,77 6,40 8,07
Power absorbed
+7 °C / +35 °C - Floor heating system kW 1,05 1,43 1,86 2,71
-7 °C / +35 °C - Floor heating system kW 1,75 1,89 2,73 3,41
+7 °C / +45 °C - Low temperature radiator kW 1,21 1,68 2,28 2,61
-7 °C / +45 °C - Low temperature radiator kW 1,80 2,16 3,04 3,93
Coefcient of performance (COP) (+7 °C / + 35 °C) 4,50 4,20 4,15 3,90
Electrical characteristics
Supply voltage (50 HZ) V 230
Maximum current for appliance A 15 15 17 17
Nominal current A 8,3 8,3 11,7 13,2
Maximum current of the electrical back-ups A 13,05 / 26,1
Power of the electrical back-ups (option) kW ajustable 3 or 6 kW
Real power absorbed
- by the fan W 54 54 103 103
- by the circulation pump W 70
Maximum power absorption by the outdoor unit W 3450 3450 3910 4500
Electrical back-up power DHW W 1800
Hydraulic circuit
Maximum operating pressure bar 3
Hydraulic system ow rate 4°C<Δt<8°C (nominal conditions) l/h 540 / 1100 600 / 1400 860 / 1700 1000 / 2100
Various
Weight of outdoor unit kg 40 40 64 64
Weight of hydraulic unit (empty/full of water) kg 146 / 350
Water capacity of the hydraulic unit l 24
Water capacity of the domestic tank l 190
Noise level at 1 m 1 (hydraulic unit) dB 39
Sound power level according to EN 12102 2 (hydraulic unit) dB 46
Noise level at 5 m 1 (outdoor unit) dB 39 39 41 41
Sound power level according to EN 12102 2 (outdoor unit) dB 65 66 68 68,5
Heating system operating limits
Outdoor temperature mini/maxi °C -15 / +24
Initial max. heating water temperature
- Floor heating system °C 45
- Low temperature radiator °C 52
Refrigeration circuit
Diameter of gas pipes inches 1/2 1/2 5/8 5/8
Diameter of liquid pipes inches 1/4 1/4 3/8 3/8
Factory charge of refrigerant R410A 3 g 1250 1250 2100 2100
Maximum operating pressure bar 45
Minimum length of pipes m 5
Maximum length of pipes 4m 15 15 20 20
Maximum level difference m 15 15 20 20
1.3 Specications
1 Sound pressure level in (x)m of the device, 1,5m of the ground,
the open eld.
2 The sound power level is a laboratory measure of the emitted
sound power but contrary to the noise level, it doesn't correspond to
the measure of the felt.
3 Refrigerant R410A (as per the standard EN 378.1).
4 Factory charge of refrigerant R410A.
Installation and operating manual "1435 - EN" - 5 -
Heat Pump alféa extensa duo

77900
830
21
9
400
33031 12
196
147
170
99
3/8”
5/8”
370
650
AIR
Front view
Side view
Top view
AIR
Overflow hole (Ø 20) 4 Ø 10)Holes
Sight of lower part
540
66790
10
347
300
189
177
578
320
121 184
A
B
A
B
S8
S5
S6
1/4” 1/4”
1/2” 5/8”
Top view
Front view
Sight of lower part
Overflow hole (Ø 20) 4 Holes Ø 10)
AIR
Side view
AIR
gure 1 - Dimensions in mm
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 6 -
"Outside unit,
Model extensa duo 5
Model extensa duo 6
"Outside unit,
Model extensa duo 8
Model extensa duo 10

598 648
1799 1817
630
42,7
599
576
125 210
1256
47,2
1093
1148
272
55
194
gure 2 - Dimensions in mm
Blockage in the hydraulic unit, see gure 13, page 15.
Back view
Heating ow
DHW
DCW
Heating return
Side view Front view
"Hydraulic module
Installation and operating manual "1435 - EN" - 7 -
Heat Pump alféa extensa duo

gure 3 - Hydraulic pressures and ow rates available
-50
1000
10000
43907
2490
338
-25 0 25 50 75 ° C
0
2500
5000
7500
10000
12500
15000
17500
20000
22500
25000
27500
30000
32500
0 10 20 30 40 50 60 70 80 90 100
°C
Outdoor sensor QAC34
Heat pump return sensor
Heat pump ow sensor
gure 4 - Ohmic values of the sensors
(Hydraulic module)
gure 5 - Ohmic values of the sensors (outside 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
- Evaporator outlet
- Evaporator center
- Compressor casing
- Outside
Temperature °C
Ohmic value (kΩ)
0
100
200
300
400
500
600
mbar
1 mbar = 10 mmCE = 100 Pa
m /h
3
11,5 2 2,50,50
2
4
66
ext. in
2
4
67
4
2
0
100
200
300
400
500
600
mbar
1 mbar = 10 mmCE = 100 Pa
m /h
3
11,5 2 2,50,50
2
4
77
ext. in
2
4
67
4
2
Variable pressure
Constante pressure
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 8 -

1.4 Description
gure 6 - Outside unit components
13 1
2
12 1110
9
8
7
6
5
3
13
1
2
12 1110
9
8
7
6
5
4
3
Legend :
1 - Low-noise, high-output coil.
2 - Electric variable speed "inverter" motor.
3 - "Inverter" control module.
4 - Vacuum start (pump down) and control light.
5 - Connection terminal blocks
(power and interconnection).
6 - Refrigerant accumulator bottle.
7 - Cycle reversing valve.
8 - Anti-corrosion treated bodywork.
9 - Electronic expansion valve.
10 - Noise and temperature insulated "inverter" compressor.
11 - Refrigeration connection valves (ared connectors) with protective caps.
12 - Holding tank with condensate drain hole.
13 - High-performance exchange surface evaporator ; anti-corrosion treated
hydrophilic aluminium ns and grooved copper tubes.
Installation and operating manual "1435 - EN" - 9 -
Heat Pump alféa extensa duo
"Model extensa duo 5
Model extensa duo 6
"Model extensa duo 8
Model extensa duo 10

1.5 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 uid (R410A) circulates.
- In the evaporator (ref. 13, gure 6, page 9) :
The energy is taken from the surrounding air and is
transmitted to the refrigerant. Because it has a low
boiling point, it changes from the liquid state to the
vapour state, even in cold weather (down to -15 °C
outdoor temperature).
- In the compressor (ref. 10, gure 6, page 9) :
The vaporised refrigerant brought to high pressure
and takes on more calories.
- In the condenser (ref. 15, gure 7) :
The energy in the refrigerant is transmitted to the
heating circuit. The refrigerant returns to liquid state.
- In the expansion valve (ref. 9, gure 6, page 9) :
The liqueed refrigerant is brought back to low pressure
and returns to its initial temperature and pressure.
The heat pump is equipped with a controller, which
controls the room temperature based on the outdoor
temperature measurement and governed by the
temperature control. The room thermostat (option)
provides a corrective action for the temperature control.
The hydraulic unit can be optionally tted with an
electrical back-up system or boiler connection which
starts up in order to provide addtional heating during the
coldest periods.
Legend :
1 - Electric box.
2 - Regulator / User interface.
3 - Start/stop switch.
4 - Hydraulic pumping unit.
5 - Distribution valve.
6 - Gas refrigeration connection .
7 - Liquid refrigeration connection.
8 - Condensation sensor.
9 - Drain valve.
10 - Safety valve.
11 - Safety thermostat.
12 - Manometer.
13 - Manual drainer.
14 - Expansion vessel.
15 - Condenser.
16 - Electrical back-ups DHW (Soapstone).
17 - ACI.
18 - ACI card.
Sensors :
21 - HP Initial sensor.
22 - DHW sensor.
23 - HP Return sensor.
• Regulation functions
- The heating circuit's initial temperature is controlled by
the temperature control.
- The power of the outdoor unit is modulated according
to ow heating temperature via the "inverter"
compressor.
- Control of the electrical back-up heating (option).
- The daily timer program enables you to dene
the periods for comfortable or reduced ambient
temperature.
- Summer/winter mode switchover is automatic.
- Control of the supplementary boiler* (option / the
electrical back-ups are deactivated).
- The room thermostat (option)*: provides a corrective
action for the temperature control.
- Control of a second heating circuit*.
- Domestic hot water: Heating time programme, control
of the operation of the DHW circulation pump.
- Managing the cooling*.
- Control of swimming pool heating*.
* If the heat pump is equipped with optional equipment and the
associated kits.
• Protection functions
- Anti-legionella cycle for domestic hot water.
- Anti-corrosion protection with titanium anode (ACI).
- Frost protection, DHW,...
gure 7 - Hydraulic unit components
3
12
1
10
4
9
8
21
23
14
5
17
22
16
11
9
9
2
18
15
13
6 7
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 10 -

• Domestic hot water (DHW) operating principle
Two domestic hot water (DHW) temperatures can be
parametered: nominal temperature (line 1610 to 55 °C)
and reduced temperature (line 1612 to 40 °C).
The default heat pump program (line 560, 561 and 562)
is set for nominal temperature from 0h00 to 5h00 and
from 14h30 to 17h00 and for reduced temperature for
the rest of the day. This optimizes electrical consumption
while ensuring comfortable availability of hot water.
Setting for reduced temperature can be useful to prevent
the DHW from switching on too often and for too long
during the day.
The production of domestic hot water (DHW) is triggered
when the temperature in the tank falls 7°C (setting from
line 5024) below the set temperature.
The heat pump produces the domestic hot water, which
is then additively heated, if required, by electrical back-
up heating inside the tank. To ensure a DHW setting
over 45°C, the electrical back-up heating or the boiler
must be left on.
Depending on how the parameter (1620) is set, nominal
temperature can be reached 24h/day or only at night or
depending on the heat pump programme.
The production of DHW takes priority over heating;
nevertheless the production of DHW is controlled by
cycles that control the times assigned to the heating
and the production of DHW in the event of simultaneous
demand.
A function to switch from "reduced" to "nominal"
is provided on the front of the user interface.
(see ref. 1, gure 31, page 30).
Anti-legionella cycles can be programmed.
gure 8 - Heat pump operating principle
Ev
Dt
Cn
Cp
1 kW
COP 4
4 kW
20 °C
PAC
HP - Heat pump
Ev - Evaporator
Cp - Compressor
Cn - Condenser
Dt - Expansion valve
Energy from the air
Heat produced
Electrical
energy
consumed
• Fan convectors with integrated control system
Do not use a room sensor in the area.
HP
Installation and operating manual "1435 - EN" - 11 -
Heat Pump alféa extensa duo

2 Installation
2.1 Regulation installation
and maintenance conditions
The appliance must be installed and the maintained by an
approved professional in accordance with the prevailing
regulations and code of practice, in particular:
- The legislation on the handling of refrigerants.
- Heating installation with oor heating system.
- Low voltage electrical installations - Rules.
2.2 Unpacking and reservations
2.2.1 Receipt
Carefully check, in the carrier's presence, the general
appearance of the appliances and check that the
outdoor unit is not laid on its side or back.
In the case of any dispute, state any appropriate
reservations to the carrier in writing within 48 hours and
send a copy of this letter to the After-Sales service.
2.2.2 Handling
The outdoor unit should not be laid on its side or back
during transport.
If not kept upright during transport, the appliance could
be damaged through displacement of the refrigerant
and deformation of the compressor suspension.
Any damage caused by transportation of the unit lying
down is not covered by the warranty.
If necessary the outdoor unit may be tilted only during
manual handling (to go through a door or use a staircase).
This operation must be conducted very carefully and
the appliance must be immediately restored to upright
position.
2.2.3 Accessories provided
Accessories provided with the outdoor unit (gure 9).
Accessories provided with the hydraulic unit (gure 10).
2.3 Installation position
The choice of the position for installation is particularly
important insofar as any later movement is a delicate
operation requiring the intervention of a qualied person.
Choose the site of the outdoor unit and the hydraulic
unit after discussion with the customer.
Observe the maximum and minimum distances between
the hydraulic unit and the outdoor unit (gure 16, page 17),
the guarantee of the performances and the system's
service life depend on this.
2.4 Installation of the outdoor unit
2.4.1 Installation precautions
"The outdoor unit must only be installed outdoor
(outdoors). If a shelter is required, it must have
broad openings on the 4 walls and observe the
installation clearances (gure 11).
• Choose a site that is preferably sunny and sheltered
from strong cold predominant winds (mistral,
tramontana, etc…).
• The unit must be easily accessible for future installation
and maintenance work (gure 11).
• Ensure that it is possible to make the connections to
the hydraulic unit easily.
• The outdoor unit is able to withstand bad weather but
avoid installing 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 drain away from the outdoor unit when it
is operating. Do not install the appliance on a paved
terrace; choose a well-drained place (e.g. gravel
or sand). If the installation is in an area where the
temperature can be lower than 0°C for a long period,
check that the presence of ice does not present any
danger. A drainage pipe can also be connected to the
outdoor unit (gure 12).
13
24
1 Elbow
For draining away the
condensates
2
Plug (x 2)
(Depending on the
model)
3Flexible insulation
plate
For lling the empty space
at the input to the
interconnection cable
4 Hex / Allen key To open the valves
gure 9 - Accessories provided with the outdoor unit
5 Outdoor sensor To monitor the outside
temp
6
Adaptater
1/2" - 5/8" and/or
1/4" - 3/8" To connect the ared
connection and the
hydraulic model
7Nut 1/2"
and/or 1/4"
gure 10 - Accessories provided with the hydraulic unit
8
5 6 7
5 6
7
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 12 -

• Nothing should obstruct the air circulation through the
evaporator and from the fan (gure 11).
• Keep the outdoor unit away from heat sources and
inammable products.
• Make sure the appliance not disturb the surrounding
area or users (noise level, draught generated, low
temperature of the air being blown out, with the risk of
freezing plants in its path).
• The surface on which the appliance is installed must:
- be permeable (soil, gravel, etc),
- support its weight easily,
- provide a solid xing and
- not transmit any vibration to the dwelling.
(Anti-vibratory blocks are available as an option).
• The wall brackets is strongly discouraged due to
vibration.
gure 11 - Minimum installation clearances around outside unit (all models)
AIR
100 mm 100 mm
600 mm
100 to 300 mm
300 mm
300 mm
250 mm
For access
250 mm
For access
250 mm
For access
AIR
AIR
AIR
minimum
600 mm
AIR
Installation and operating manual "1435 - EN" - 13 -
Heat Pump alféa extensa duo

2.4.2 Outdoor unit positioning
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 (gure 12).
- Fasten the outdoor unit by means of screws and
rubber tightening or toothed lock washers to avoid
their coming loose.
"Warning
In the area with heavy snowfall, if the intake and outlet
of outdoor unit is blocked with snow, it might become
difcult to get warm and it is likely to cause of the
breakdown.
Please construct a canopy and a pedestral or place the
unit on high stand (local congured).
- Set the unit on a strong stand, such as one made of
concrete blocks to minimize shock and vibration.
- Do not set the unit directly on the ground because it will
cause trouble.
2.4.3 Condensate drain hose
(see gure 12)
If the use of a discharge pipe is imperative:
- Use the elbow provided (C) to connect a 16mm-
diameter hose for draining away the condensate.
- Use the stopper or stoppers provided (B) to block the
opening of the condensate tank.
Allow for the condensate to ow away under the force of
gravity (waste water, rain water, gravel bed).
"If the installation is made in an area where
the temperature can be lower than 0°C for
a long period, provide the drain pipe with a
trace resistance to avoid it icing up. The trace
resistance must heat not only the pipe but
also the bottom of the appliance's condensate
collection tank.
S
B
C
BH > 50 mm
*
(Ø 12 mm)
(Ø 10 mm)
Depending on the model
Depending on the model
*In regions subject to frequent snow,
(H) must be greater than the average snow layer
.
4 holes
4 holes
gure 12 - Positioning of the outside unit,
draining away the condensate
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 14 -

2.5 Installing the hydraulic unit
2.5.1 Installation precautions
• The room in which the appliance operates must
comply with the prevailing regulations.
• To facilitate maintenance and to allow access to the
various components, we recommend that you provide
sufcient space all around the hydraulic unit (gure 13).
• Be careful not to bring inammable gas near to the
heat pump during its installation, in particular when
it requires brazing. The appliances are not reproof
and should therefore not be installed in a potentially
explosive atmosphere.
gure 13 - Minimum installation clearances
around the hydraulic module
and distances to the combustible partitions
gure 14 - Removing the cover
300 mm
1000 mm
125 mm
1800 mm
Front view
Installation and operating manual "1435 - EN" - 15 -
Heat Pump alféa extensa duo

2.6 Refrigeration connections
"This appliance uses refrigerant R410A.
Comply with the legislation for handling refrigerants.
2.6.1 Rules and precautions
• After every intervention on the refrigeration circuit and
before nal connection, take care to replace the plugs
in order to avoid any pollution from the refrigeration
circuit.
• Tools
- Set of manometers with hoses exclusively reserved
for HFCs (Hydrouorocarbons).
- Vacuum pump specially for HFCs.
- Provision on using tools that have been in contact with
HCFCs (R22 for example) or CFCs.
- Use of a traditional vacuum pump is authorized if, and
only if, it is tted with a non-return valve on the suction
side.
The manufacturer declines any liability with regard to the
guarantee if the above instructions are not observed.
• Flared connections
"Lubrication with mineral oil (for R12, R22)
is forbidden.
- Only lubricate with polyolester refrigeration oil (POE).
If POE is not available, t without lubrication.
Coat the ared surface
with POE refrigeration oil.
Do not use mineral oil.
• Brazing on the refrigeration circuit (if necessary)
- Silver brazing (40% minimum recommended).
- Brazing only under dry nitrogen internal ux.
• To eliminate any lings in the pipes, use dry nitrogen
to avoid introducing any humidity that may adversely
affect the appliances operation. In general, take every
precaution to avoid humidity penetrating into the
appliance.
• Proceed to insulate the gas and liquid pipes to avoid
any condensation. Use pipe insulators resistant to
temperatures over 90°C. In addition if the humidity
level in areas where the refrigeration pipes are
installed is expected to exceed 70%, protect the pipes
with pipe insulators. Use an insulating material thicker
than 15mm if the humidity level is 70~80%, and an
insulating material thicker than 20mm if the humidity
exceeds 80%. If the recommended thicknesses are
not observed under the conditions described above,
condensation will form on the surface of the insulation
material. Lastly, take care to use pipe insulators
whose thermal conductivity is 0.045 W/mK or less
when the temperature is 20°C. The insulation must be
impermeable to resist the passage of steam during the
defrosting cycles (breglass wool is prohibited).
2.6.2 Refrigeration connections
The outdoor unit must be connected to the hydraulic
unit with copper pipes and connections (refrigeration
quality), insulated separately.
Comply with the pipe diameters and the permitted pipe
lengths (gure 16).
The minimum length of the refrigeration connections
is 5 m for correct operation.
The appliance will be excluded from guarantee if it is
used with refrigeration connections less than 5 m long.
Manipulate the pipes and take them through walls with
protective plugs in place.
2.6.3 Creating the arings
- Cut the pipe to an appropriate length with a pipe-cutter
without deforming it.
- Carefully deburr it, holding the pipe towards the bottom
to avoid introducing lings into the pipe.
- Remove the ared connection nut situated on the
valve to be connected and slip the pipe into the nut.
- Proceed to are, letting the pipe overow the aring
tool.
- After aring, check the condition of the working
radius (L). This must not show any scratch or trace of
any fracturing. Also check the dimension (B).
gure 15 - Flaring for are connections
Flaring tool
Hose
Flare
nut
B
L
C
ø Hose
dimensions in mm
L B 0/-0,4 C
6,35 (1/4") 1,8 to 2 9,1 17
9,52 (3/8") 2,5 to 2,7 13,2 22
12,7 (1/2") 2,6 to 2,9 16,6 26
15,88 (5/8") 2,9 to 3,1 19,7 29
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 16 -

2.6.4 Shaping the refrigeration pipes
The refrigeration pipes must be shaped only on a
bending machine or with a bending spring in order to
avoid any risk of crushing or breaking them.
"Warning !
• Remove the insulation material locally to bend the
pipes.
• Do not bend the copper to any angle over 90°.
• Never bend pipes more than 3 times in the same
position otherwise traces of fracturing may appear
(from strain-hardening the metal).
 gure 16 - Connecting the  ared connections (Pipe diameters and permissible lengths)
“Gas” refrigeration connection
Diameter D1
"Liquid" refrigeration connection
Diameter D2
Flare nut
Flare nut
Flare
nut
Flare
nut
Liquid
valve
Gas
valve
Hydraulic
unit
Outdoor unit
HP model extensa duo 5 & 6 extensa duo 8 & 10
gas  uid gas  uid
Outdoor unit connections 1/2" 1/4" 5/8" 3/8"
Refrigeration
connections
Diameter (D1) 1/2" (D2) 1/4" (D1) 5/8" (D2) 3/8"
Minimum length (L) 5 5
Maximum length* (L) 15 20
Maxi. level difference (D) 15 20
Male-female adapter (reduction) (R1) 1/2" - 5/8" (R2) 1/4" - 3/8" none
Hydraulic unit connections 5/8" 3/8" 5/8" 3/8"
* : without additional charge of R410A.
DL
HP
HP
Installation and operating manual "1435 - EN" - 17 -
Heat Pump alféa extensa duo

2.6.5 Connecting the ared connections
"The small pipe must always be connected
before the large one.
"Take particular care positioning the tube
opposite its connector so as not to risk damaging
the threads. A carefully aligned connector can
be tted easily by hand without much force
being required.
"The refrigeration circuit is very sensitive to dust
and humidity: check that the area around the
connection is clean and dry before removing the
plugs protecting the refrigeration connectors.
- Depending on the case, connect an adapter (reducer)
1/4''- 3/8'' or 1/2''- 5/8'' (see gure 16, page 17).
- Remove the plugs from the pipes and the refrigeration
connections.
- Present the pipe to the ared connector and screw the
nut by hand while holding the connector with a wrench
until contact.
- Comply with the indicated tightening torques.
gure 17 - Tightening torque
Designation Tightening torque
Flare nut 6,35 mm (1/4") 14 to 18 Nm
Flare nut 9,52 mm (3/8") 33 to 42 Nm
Flare nut 12,7 mm (1/2") 50 to 62 Nm
Flare nut 15,88 mm (5/8") 63 to 77 Nm
Plug (A) 3/8", 1/4" 20 to 25 Nm
Plug (A) 1/2" 25 to 30 Nm
Plug (A) 5/8" 30 to 35 Nm
Plug (B) 3/8", 5/8" 10 to 12 Nm
Plug (B) 1/2", 1/4" 12,5 to 16 Nm
Holding wrench
Torque wrench
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 18 -

2.7 Filling the installation with gas
"This operation is reserved for installers familiar
with the legislation for handling refrigerants.
"Creating a vacuum with a vacuum pump is
essential.
"Never use equipment used beforehand with any
refrigerant other than a HFC.
2.7.1 Example of commissioning procedure
Lo Hi
Manometer kit
(manifold)
Vacuum pump
Service hose
Low
pressure
High
pressure
Gas valve
Large diameter
Vacuum meter
Refrigeration connexion
Plug (A)
Hex / Allen key of 4 mm
3-way valve
Load orifice
Plug (B)
Service hose (blue)
fitted with valve push-button
gure 18 - Extraction under vacuum and gassing
• First seal test
- Remove the protective plugs (B) from the charging
hole (Schrader) in the gas valve (large diameter).
- Connect the hose to the manifold.
- Connect the bottle of nitrogen to the manifold.
- Pressurize the refrigerant circuit to 10 bar with nitrogen.
- Leave the circuit under pressure for half a day.
- Check that the pressure has not fallen.
- Look for and repair any leaks, and then recommence
the test.
- Once the pressure has remained steady for a few
hours, empty the nitrogen.
• Creating a vacuum and lling the refrigeration
connections with gas
- Connect the vacuum pump to the manifold.
- Create a vacuum until the residual pressure in the
circuit falls below 0,01 bar.
- Let the pump continue to operate for another
30 minutes after reaching the vacuum.
- Close the blue valve on the set of manometers and
then stop the vacuum pump without disconnecting
any of the hoses in place.
- Leave for at least half a day.
If after this time the pressure has risen, there
is a leak. Find and repair the leak and then
recommence vacuum testing.
When the pressure remains steady for a few
hours after stopping the vacuum pump, the circuit
can be considered airtight.
- Remove the access plugs (A) from the valve controls.
- First of all fully open the small valve and then the
large one using a hex key (counterclockwise direction)
without forcing excessively against the stop.
- Remove the blue hose rapidly.
- Ret the 2 plugs and tighten them to the recommended
tightening torque (gure 17, page 18).
The outdoor unit does not contain any additional
refrigerant, enabling the installation to be purged.
Flushing is strictly forbidden.
2.7.2 Sealing test
Once the refrigeration circuit has been gassed as
described above, check that all the refrigeration
connectors are gas-tigh (4 connectors).
The sealing test must be performed with an approved
gas detector. If the arings have been made correctly,
there should be no leaks.
"If there is a leak:
- Bring the gas into the outdoor unit (pump down).
- Make the connection again.
- Repeat the commissioning procedure.
Installation and operating manual "1435 - EN" - 19 -
Heat Pump alféa extensa duo

2.8 Hydraulic connecting
2.8.1 General
The connection must comply with good trade practice
according to local building regulations.
The heating circulating pump is built into the hydraulic unit.
Connect the central heating pipes to the appliance,
complying with the direction of circulation.
The pipe between the heat pump and the heat collector
must be at least one inch in diameter (26x34 mm).
Calculate the diameter of the pipes according to the
ow rates and the lengths of the hydraulic systems.
Tightening torque: 15 to 35 Nm.
Use union connectors to facilitate removing the hydraulic
unit.
Preferentially use connection hoses to avoid transmitting
noise and vibrations to the building.
Connect the drains from the drain valve and the safety
valve to the main sewer system.
Reminder: Seal everything when tting in accordance
with prevailing trade practice for plumbing work:
- Use suitable seals (bre seals, o-rings).
- Use Teon tape or hemp.
- Use sealing paste (synthetic depending on the case).
The use of glycol is not necessary. If you are using a
glycol/water mix, provide for an annual check on the
quantity of glycol. Use monopropylene glycol only.
Never use monoethylene glycol.
"In certain installations, the presence of different
metals can cause corrosion problems; the
formation of metal particles and sludge in the
hydraulic circuit is then seen.
"In this case, it is advisable to use a corrosion
inhibitor in the proportions indicated by its
manufacturer.
- Please refer to the chapter "Treatment of domestic and
heating water" in our price catalogue.
"It is also necessary to ensure that the treated
water does not become aggressive.
R1
D
MT
CAR
GS
gure 19 - Overall hydraulic layout
Legend:
CAR : Non-return valve.
D : Shut-off.
GS : Safety unit.
MT : Thermostatic mixer valve.
R1 : Heating circuit.
Ø 26x34
1" Male
Ø 20x27
3/4" Male
Installation and operating manual "1435 - EN"
Heat Pump alféa extensa duo
- 20 -