Immergas Rapax 300 V2 Operating instructions

RAPAX 300 V2
RAPAX 300 SOL V2
Instruction and
recommendation booklet
IE

Dear Customer,
Our compliments for having chosen a top-quality Immergas product, able to assure well-being and safety for a long period of time. As an Immergas customer
you can also count on a qualied aer-sales service, prepared and updated to guarantee constant eciency of your boiler. Read the following pages carefully:
you will be able to draw useful suggestions regarding the correct use of the appliance. By respecting these suggestions, you will no doubt be satised with your
Immergas product.
For any assistance and scheduled maintenance please contact Authorised Aer-Sales centres: they have original spare parts and are specically trained by the
manufacturer.
General recommendations
All Immergas products are protected with suitable transport packaging.
e material must be stored in a dry place and protected from weathering.
e instruction book is an integral and essential part of the product and must also be given to the new user in the case of transfer or succession of ownership.
It must be stored with care and consulted carefully, as all of the warnings provide important safety indications for installation, use and maintenance stages.
is instructions manual provides technical information for installing Immergas boilers. As for the other issues related to boiler installation (e.g. safety in the
work site, environment protection, injury prevention), it is necessary to comply with the provisions of the regulations in force and the principles of good practice.
In compliance with the legislation in force, the systems must be designed by qualied professionals, within the dimensional limits established by the Law.
Installation and maintenance must be performed in compliance with the regulations in force, according to the manufacturer's instructions and by professionally
qualied sta, intended as sta with specic technical skills in the system sector, as envisioned by the Law.
Improper installation or assembly of the Immergas appliance and/or components, accessories, kits and devices can cause unexpected and not foreseeable
problems for people, animals and properties. Read the instructions provided with the product carefully to ensure proper installation.
Maintenance must be carried out by skilled technical sta. e Authorised Aer-sales Service represents a guarantee of qualications and professionalism.
e appliance must only be destined for the use for which it has been expressly declared. Any other use will be considered improper and therefore potentially
dangerous.
If errors occur during installation, operation and maintenance, due to non-compliance with technical laws in force, standards or instructions contained in
this book (or however supplied by the manufacturer), the manufacturer is excluded from any contractual and extra-contractual liability for any damages and
the appliance warranty is invalidated.
e manufacturer declines all liability due to printing or transcription errors, reserving the right to make any modications to its technical and commercial
documents without prior notice.

INDEX
1 Important Recommendations...........................5
1.1 Warnings.............................................................. 5
1.2 Installation........................................................... 5
1.3 Plumbing connection......................................... 5
1.4 Wiring. .................................................................5
2 Product presentation.......................................... 6
2.1 Important advice................................................. 6
2.2 Technical features. ..............................................6
2.3 Dimensions and components............................7
3 Installation........................................................... 8
3.1 Choice of the installation place......................... 8
3.2 Product installation. .........................................11
3.3 Plumbing connection.......................................11
3.4 Aeration connection.........................................12
3.5 Electrical connection........................................12
3.6 Electrical connection for plus boiler and
photovoltaic system. .........................................14
3.7 Boiler wiring diagram. .....................................15
3.8 Commissioning.................................................16
3.9 ermal solar connection diagram
(optional). ..........................................................17
3.10 Boiler solar connection diagram (optional)..17
4 Parameter settings / Utilisation.......................18
4.1 Remote panel.....................................................18
4.2 Description of symbols. ...................................18
4.3 Main menu.........................................................18
4.4 System settings. .................................................19
4.5 Parameters to be adjusted upon installation. 19
4.6 Selection of operating modes..........................19
4.7 Controls lock. .................................................... 20
4.8 Mode in “Heat pump only” system ................ 20
4.9 Mode in system “Connection with the
boiler”..................................................................20
4.10 Mode in system “Connection to the solar
system”................................................................20
5 Recommendations - maintenance and repairs...21
5.1 Advice for the user............................................ 21
5.2 Domestic maintenance.....................................21
5.3 Maintenance by approved professionals........ 21
5.4 Troubleshooting support. ................................21
5.5 Work on the boiler............................................22
5.6 Quick fault diagnosis for use carried out by a
professional technician.....................................24
5.7 Aer-sale service...............................................25
5.8 Scope of application of the warranty. ............. 25
5.9 Declaration of conformity................................25
6 Product che (in compliance with
Regulation 812/2013). ......................................26
7 Parameters for lling the form of the whole
system.................................................................27

5
1IMPORTANT RECOMMENDATIONS
1.1 WARNINGS.
is appliance may only be used by
adults Users whose physical, sensory
or mental abilities are not impaired.
Before using this appliance, it is in any
case required to read this instructions
booklet (User section) and/or the op-
erating instructions by skilled technical
personnel.
Use by incompetent adult personnel
let alone by children is forbidden, both
due to safety issues and to issues of cor-
rect appliance operation and warranty.
is appliance has been designed to
serve one residential housing unit only
(and similar) subject to assessment of
the energy requirement for domestic
hot water; it is not a heating system
pursuant to the legislation in force.
1.2 INSTALLATION.
Warning: due to its weight (from 90
to 110 kg depending on the version),
this appliance must be handled with
care to avoid injury to persons or
damage to property and to the prod-
uct itself. Installation must therefore
be performed taking into account the
following instructions:
- Install the appliance in a frost-free
room. e warranty does not cover
any appliance breakdown caused by
excessive pressure due to the safety
valve blocking because of ice.
- Ensure the oor on which the appli-
ance is to be installed is suitable to
withstand the appliance's own weight
and that of the water content (270 li-
tres approximately). It is recommend-
ed to perform a structural assessment
by the designer of the dwelling.
- If the boiler is mounted on a false ceil-
ing, under the roof or above a living
area, it is mandatory to install a drip
tray to be connected to the drain.
- Suitably aerate the installation room
in the event the appliance is to be
installed in a room and/or in a posi-
tion where the ambient temperature
is always higher than 35°C.
- is device is intended for use up to
a maximum height of 3000 m.
- Position the appliance in an accessible
area and at such a distance from the
wall to permit correct maintenance /
accessibility (Parag. 3.1).
- Refer to the installation diagrams
(Parag. 3.1).
Warning: failure to comply with rec-
ommended installation procedures,
especially those related to the room
volume below the minimum of 20
m, may signicantly reduce system
performance.
- It is recommended to provide suita-
ble shut-o valves on the plumbing
coupling to allow for any routine and
extraordinary maintenance opera-
tions which might require emptying
/ lling the boiler.
- In order to prevent any stability and
safety issues, it is obligatory to secure
the boiler to the oor, on a at surface,
using the fastening anchors supplied.
1.3 PLUMBING CONNECTION.
It is mandatory to install a safety device,
set to be triggered at 0.7 MPa (7 bars)
(not supplied with the boiler), sized
3/4”, compliant with standard EN1487
as amended and added, and in any
case compliant with local regulations
in force, to be tted to the cold water
inlet of the boiler.
e safety device must be protected
from ice.
e safety unit must be tted with a
discharge device (overpressure) to
be operated regularly to remove any
limestone deposits.
It must also be checked regularly to
ensure it is not blocked.
e pressure reducer (not supplied as
standard) is required when the water
mains pressure exceeds 0.5 MPa (5
bars) and must be mounted on the
main water supply line.
e safety unit must also be connected
to a drain pipe kept in the open air, in
a frost-free environment, with a per-
manent downward gradient, to remove
any expansion water from the heating
process, or drainage water from the
water-heater.
e maximum operating pressure of
the heat exchanger circuit must not
exceed 0.3 MPa (3 bars) and its max
temperature must not exceed 100°C.
To perform any discharge operations
of the water-heater, strictly adhere to
the following sequence:
- Disconnect the appliance from the
electrical power supply.
- Disconnect the appliance from the
mains water supply (cold water).
- Open the hot water cock.
- Actuate the discharge device of the
safety unit.
1.4 WIRING.
Before removing the cover of the wa-
ter-heater, always ensure the power is
disconnected, to prevent any risk of
injury due to electric shocks.
e following must be provided up-
stream of the electrical installation:
- A thermal magnetic breaker or 16A
multi-pole fuse with contacts compli-
ant with regulations in force.
- A 30 mA dierential circuit breaker.
Should the power supply cable be found
to be damaged for any reason, it must
be replaced by the Aer-sale Support,
or in any case by skilled and qualied
personnel.
e water-heater must be connected to
earth according to the methods set out
by the regulations in force.
A special terminal, suitably marked
is provided for the specic purpose.
is manual is supplied jointly with
the boiler; in the event of loss it may
also be obtained from the Authorised
area Support service or be downloaded
from the suitable website.

6
2-2
2-1
2PRODUCT PRESENTATION
2.1 IMPORTANT ADVICE.
Transport and storage. e product may be
transported in upright position on a pallet, or
rotated by 90° on a side
e appropriate side is shown clearly on an in-
formation label placed on the product packaging.
It is forbidden to transport the product lying
on the other sides as it might be irreparably
damaged.
An inclination indicator is used to check that the
product has been transported and handled in
accordance with our recommendations.
We recommend to strictly comply with these
instructions.
e product warranty shall be voided in the
event the above instructions should not be
complied with (evidenced by the red colouring
of the position indicator (Fig. 2-1).
e manufacturer disclaims any liability for any
fault to the product resulting from transport or
handling not complying with the above recom-
mendations.
Under no circumstances may this product be
stacked (Fig. 2-2).
Safety directives. The installation work and
commissioning of thermodynamic boilers can
be hazardous due to high pressure and electrical
parts.
Thermodynamic boilers must be installed,
commissioned and maintained by trained and
qualied personnel only.
2.2 TECHNICAL FEATURES.
Dimensions
Empty weight (version without coil) Rapax 300 V2
Empty weight (version with coil) Rapax 300 Sol V2
Capacity of tank
Hot + cold water connection
Anti-corrosion protection
Maximum operating pressure
kg
kg
L
bar
H 1949 x w 620 x D 665
92.8
108
270
3/4’’ M
Magnesium anode
8
Electrical connection (voltage/frequency)
Max total power absorbed by the device
Average power absorbed by heat pump
Max power absorbed by heat pump
Power absorbed by auxiliary electrical unit
W
W
W
W
230 V single-phase 50 Hz
2465
525
665
1800
Setting range of the water temperature of the heat pump
Temperature range for the use of the heat pump (air temperature)
°C
°C
from 40 to 62 (temperature factory setting 52°C)
from -5 to +43
Air ow rate without ducts
- Speed 1
- Speed 2
Load losses acceptable on ventilation circuit, without aecting performance
Coolant uid
Mass of coolant uid
Coolant uid volume
m3/h
m3/h
Pa
300
390
25
kg/l
Ton CO2 Eq.
R134a (IGN.TR.8)
1.35
1.9
POSITIONS ALLOWED
DURING TRANSPORT
POSITIONS NOT ALLOWED
DURING TRANSPORT

7
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 22
23
24
25
26
2-4
2-3
Not shown: manual, dielectric connection,
condensate discharge pipe, safety unit.
Key:
1 - Adjustable nozzle
2 - Rear cover
3 - Aeraulic shoe
4 - Filter
5 - Condenser 15F
6 - Pressure reducer
7 - Fan spiral
8 - Hot gases valve unit
9 - Flue pressure switch
10 - Fan
11 - Fan support plate
12 - Condenser 1,5F
13 - Condenser 4F
14 - Terminals unit
15 - Front cover
16 - Compressor
17 - Compressor jacket
18 - Column support guide
19 - Heating element
20 - Heating element
21 - Control console
22 - Control unit
23 - Front column
24 - Plug in the lower part
25 - Jacket cover
26 - Adjustment board
2.3 DIMENSIONS AND COMPONENTS.
Key:
AC - 3/4” M Domestic hot water outlet
AF - 3/4” M Domestic cold water inlet
MP - 1” F Flow from solar panels (Rapax 300 Sol V2 model only)
RP - 1” F Return to solar panels (Rapax 300 Sol V2 model only)
SC - Condensate drain  
RC - 3/4” M Recirculation (Rapax 300 Sol V2 model only)
Ref. Rapax 300 V2 Rapax 300 Sol V2
X304 462

8
3-1
3INSTALLATION
3.1 CHOICE OF THE INSTALLATION
PLACE.
Floor strength • Withstands a load of 400 kg at least (surface below boiler)
PLEASE NOTE: strictly install a water storage tank under the boiler when the latter is positioned
under inhabited buildings.
e installation area shall be suitable for protection index IPX1B, as per provision CEI 64-8
Non-ducted or
semi-ducted conguration
Ducted conguration
Type of installation room
Room examples
Volume of room where air is extracted
Temperature of boiler installation room
Air intake temperature
Ceiling height
Surface area required
• Unheated room, characterised by temperature
exceeding 5°C and preferably insulated from
the home's heated rooms.
• Recommended room= basement or semi-base-
ment, room where the temperature is higher
than 10°C all year round.
• garage, boiler room (with the exception of
rooms where type B generators are installed),
basement oor, ironing room, etc.
• Volume > 20 m3
• from 5°C to 43°C.
• -5°C to 43°C.
• > 2.00 m.
• 2,10 m2(Fig. 3-1).
• Crucial for the surface to be level.
• Room at least frost-free.
• Recommended Room = living space (the heat
loss of the boiler is not wasted), close to the
outer walls.
• Do not install close to sleeping areas, because
of the noise produced.
• laundry room, cellar, cupboard in entrance hall,
etc.
• /
• > 1°C.
• -5°C to 43°C.
• > 2.00 m.
• 2,10 m2(Fig. 3-1).
• Essential for surface to be level.
"Non ducted" conguration "Ducted" conguration
"Non ducted" conguration "Ducted" conguration

9
3-3
3-2
RECOMMENDED CONFIGURATIONS.
• 1st conguration: installation without duct in
unheated room (Volume > 20 m3) (Fig. 3-2).
INTERNAL/INTERNAL parameter (Para-
graph 4.5).
Examples of unheated rooms:
- Garage: Recovery of free calories released by
car engine when turned o aer running, or
other domestic electrical goods operating.
- Laundry room: dehumidifying the room
and recovery of waste calories from washing
machines and tumble-dryers.
- Basement room: recovery of free calories re-
leased by the oor and walls of the basement.
• 2aconguration: installation in a heated or
unheated room, with ducts (Fig. 3-3).
EXTERNAL/EXTERNAL parameter (Par-
agraph 4.5).
Recommendations:
- Comply with maximum duct lengths (Para-
graph 3.4).
- Use rigid or semi-rigid ducts.
- Provide grilles at air intake and outlet to avoid
ingress of foreign bodies. PLEASE NOTE:
manually shuttered air intake and outlet
grilles are forbidden

10
3-4
CONDITIONED CONFIGURATIONS (sub-
ject to assessment).
• Installation in unheated room, with 1 duct
only (volume > 20 m3) (Fig. 3-4).
INTERNAL/EXTERNAL parameter (Para-
graph 4.5).
Possible consequence:
- In the event of installation with air intake
in the same room and expulsion through
duct, the ventilation openings must be sized
providing a minimum diameter of 160 mm.
PLEASE NOTE: in winter, the intake air will be
colder than that discharged by the boiler, which
will increase garage cooling.
FORBIDDEN CONFIGURATIONS.
Installation congurations forbidden Associated risk
e boiler takes air from a room containing a heat
source, that has to be paid, used to heat this place.
Excessive system consumption: the boiler no longer uses free calories, but those produced
by other appliances connected to other energy sources.
Connection to controlled mechanical ventilation
system (CMV).
e air ow rates in the thermodynamic boiler (around 300 m3/h) are incompatible with
those of a CMV (around 100 m3/h).
Furthermore, the CMV ducts may convey greasy vapour and dust, potentially harmful for
the duration in service of your boiler.
Connection to an attic.
In the presence of inadequate isolation between the building and the relative attics, this
type of installation may increase the thermal loss of the building.
In extreme cases, condensate might form on the ceilings of the rooms under the attic due
to its cooling.
ere is a greater risk from falling objects and dust ingress to the water-heater in this
conguration, which could reduce its life expectancy.
duct which takes air from the outside, conveying
cold air inside. Signicant loss of performance coecient PCO and much greater cooling of the room.
Connection to a geo-thermal system. Excessive loss of load, and problems balancing the two fans in series.
High risk of clogging of the evaporator.
Other prohibitions:
- Do not connect the device's fan to a tum-
ble-dryer
- Avoid very dusty rooms
- Do not extract air containing solvents or ex-
plosive materials
- Do not connect the appliance to a suction hood
used to extract greasy or polluted air.
- Do not install the boiler in a room exposed to
frost
- Do not place any objects on the boiler
- In non-ducted or semi-ducted conguration,
do not place it in a room where an open cham-
ber heat generator is installed (type B)

11
3-6
3-7
3-10
3-8
3-5
3-9
3.2 PRODUCT INSTALLATION.
1 - Take the boiler to the installation premises.
2 - Open the box.
3 - Separate the boiler from the pallet and place
it where the plumbing connection is.
e boiler must be installed on a smooth
and level surface (± 1°).
If the surface is not level, the position must
be adjusted using the levelling feet.
Unless this is done, there could be problems
with removal of condensates, leading to
icing up.
It is a mandatory requirement (in accordance
with article 20 of EN 60335-1) for the boiler
to be secured to the oor using the xing
attachments provided (Fig. 3-5).
4 - Adjustment of air intake and outlet vents.
• Remove the screws from behind each of the
adjustable outlets, with a screwdriver (Fig.
3-6).
• After removing the clamping screws, the
outlets may be rotated through 360° to help
install the product (Fig. 3-7).
• To aid correct positioning of the ducts on
the adjustable outlets, a specic position is
required (Fig. 3-8) to extract the outlets from
their housing.
PLEASE NOTE: the conguration shown in Fig.
3-10 is forbidden: the device draws in the exhaust
air, which is colder.
is phenomenon, called recirculation, signi-
cantly reduces the performance of the appliance.
3.3 PLUMBING CONNECTION.
Connection to the cold water intake.
Before connecting the water supply, it is essen-
tial to clean the pipes thoroughly, to avert the
risk of any metal or other particles entering the
boiler tank.
It is obligatory to install a safety device, set to be
triggered at 0.7 MPa (7 bars) (not supplied with
the boiler), sized 3/4”, compliant with standard
EN1487 as amended and added, and in any case
compliant with local regulations in force, to be
tted to the cold water inlet of the boiler. e
safety device must be protected from ice.
PLEASE NOTE: no plumbing ttings (stop valve,
pressure reducer, etc.) must be placed between
the safety unit and the cold water intake of the
boiler, except for a copper pipe.
Connect the safety unit to a drain pipe kept in
the open air, in a frost-free environment, with a
permanent downward gradient, to remove any
expansion water generated by the heating process
or drainage water coming from the boiler itself.
e pipes used must tolerate a temperature of
100°C and a pressure of 1 MPa (10 bars).
When the inlet water pressure exceeds 0.5 MPa (5
bars), a pressure reducer is required (not supplied
as standard).
e pressure reducer must be installed at the
beginning of the main distribution network.
A pressure of 0,3 to 0,4 MPa (3 and 4 bars) is
recommended.
Connection to the hot water intake.
PLEASE NOTE: do not connect the hot water
directly to copper pipes, in order to avoid copper/
iron galvanic coupling (risk of corrosion). It is
therefore obligatory to t a dielectric tting on
the hot water outlet (supplied with the appliance)
(Fig. 3-9).
Any corrosion on the threads of the hot water
outlet tting, due to failure to use the tting
supplied, shall void product warranty.
In the event pipes in synthetic material have
been used (e.g.: PER), we strongly recommend
installing a thermostatic control device at the
exit side of the boiler and set it according to the
performance of the material used.
PLUMBING CONNECTIONS FOR COIL
VERSION.
Especially for Rapax 300 V2 the use of recircula-
tion is not recommended; this type of installation
may cause water destratication in the tank,
leading to increased use of the heat pump and
electrical resistor.
Connection to the recirculation tting.
PLEASE NOTE: do not connect the recirculation
tting directly to copper pipes, in order to avoid
copper/iron galvanic coupling (risk of corrosion).
It is therefore mandatory to mount a dielectric
system to the recirculation tting (not supplied
as standard with the device).
Any corrosion on the threads of the recircu-
lation tting, due to failure to use the tting,
shall void product warranty.
PLEASE NOTE: if recirculation is not used, close
the tting with the “cap + gasket” set (supplied
with the appliance).
Connection of the primary circuit of the boiler.
PLEASE NOTE: protect from overpressure
caused by water expansion during heating with
a 0.3 MPa (3 bars) valve, and with a closed
diaphragm expansion vessel (if not tted in the
boiler). e operating pressure of the circuit must
not exceed 0.3 MPa (3 bars), and its temperature
must not be higher than 100°C.

12
Solar circuit connection.
PLEASE NOTE: protect from overpressure
caused by water expansion during heating with
a 0.6 MPa (6 bars) valve, and with a closed dia-
phragm expansion vessel. e operating pressure
of the circuit must not exceed 0.6 Mpa (6 bars),
and its temperature must not be higher than
100°C. A glycol mixture must be provided as heat
transfer uid for frost and corrosion protection.
Removal of condensates.
PLEASE NOTE: cooling of the circulating air
in contact with the evaporator leads the water
contained in the air to condensing. e con-
densed water owing down the back of the heat
pump must be removed from the heat pump and
conveyed into suitable plastic pipes.
On the basis of air humidity, up to 0.25 l/h of
condensate may be formed. e condensate
run-o must not be conveyed into the drain,
since the ammonia fumes that ow back from
the drain could damage the heat exchanger ns
and parts of the heat pump.
It is therefore obligatory to t a siphon for the
discharge of waste water (do not use for any
reason the pipe supplied to obtain a siphon).
3.4 AERATION CONNECTION.
When the volume of the room where the boiler is
installed is less than 20 m3, the appliance may be
connected to air ducts with diameter 160 mm. If
these ducts are not insulated, condensate might
form in them during appliance operation.
It is therefore essential to choose insulated air
ducts (Fig. 3-11).
Poor-quality air ducts (crushed, too long, or
with too many bends, etc.) may cause a loss of
performance.
Flexible ducts are therefore definitely not
recommended.
PLEASE NOTE: if there are connections to the
ducts, adjust fan settings accordingly.
PLEASE NOTE: the overall loss of load on
ducts and ttings for discharge and intake of air
must be less than 150 Pa. Calculation of load
losses must be made using the measurement
instruments supplied by the manufacturer, in ac-
cordance with the proposed ducting accessories.
Note: adjustable outlets may allow the use of
ducting bends to be reduced or dispensed with
altogether. For additional information on adjust-
able outlets, see Parag. 3.2.
3.5 ELECTRICAL CONNECTION.
PLEASE NOTE: the boiler may be electrically
connected only aer being lled with water.
PLEASE NOTE: do not apply upstream of the
electrical connection of the boiler a timer or
timing devices that may interrupt the appliance’s
power supply.
e boiler can be connected and operated only
with single-phase 230V AC power supply. Con-
nect the boiler with a cable having conductors
with 2.5 mm² section. Installation shall consist of:
- A thermal magnetic breaker or 16A multi-pole
fuse with contacts compliant with regulations
in force.
- A 30 mA dierential circuit breaker.
If the power cable is damaged, it must be replaced
by the manufacturer, the after-sales service
or similarly qualied personnel, due to safety
concerns.
PLEASE NOTE: earthing is obligatory.
Do not connect the power supply directly to the
electrical resistor.
e safety thermostat the electrical integration
is tted with must not be tampered with; if re-
quired, it may be repaired/maintained exclusively
by skilled and qualied personnel, according to
the instructions provided by the manufacturer.
Failure to comply with this clause shall void
the warranty.
e appliance must be installed in compliance
with the provisions of the regulations in force.
Installation with connection to a Plus boiler
(model “SOL”).
In the “SOL” version, the internal heat exchanger
may be used in alternative to Solar connection,
to connect a boiler.
ere is a pre-arrangement for electrical connec-
tion to the boiler, to be made through terminals
C1 and C2 (clean contact); this contact might be
placed in series with the NTC probe connection
of a Plus (although this will lead to DHW probe
anomaly on the boiler - until there is no demand
and the probe is therefore interrupted).
e boiler is triggered with intake air tempera-
tures outside the correct RAPAX operation range,
or if the BOOST mode is active.
Photovoltaic self-consumption contact.
e boiler is equipped with a contact to fully
exploit the electricity produced by the PV system,
in order to accumulate thermal energy within the
boiler (self-consumption).
Having an inverter/electronic device which
supplies a signal when PV production exceeds
a certain value, when this contact is closed the
boiler is triggered in heat pump mode to heat the
DHW up to 62°C, unless otherwise programmed.
When the photovoltaic contact is opened, the
system goes back to the previous settings only
after 30 min., to avoid alternating operation
caused by clouds or temporary shadows.
See the instructions for removing the front
cover, and for access to the terminal block see
paragraph 5.5.
PLEASE NOTE: A cable channel is provided
specically for this connection. Ensure it is used
(Fig. 3-12).
Number of bends Overall length of the ducts* with air outlet and
inlet mounted on wall
Overall length of the ducts** with air outlet and
inlet mounted on wall
0 bend 8 m 19 m
1 90°
elbow tting 7 m 16 m
2 90°
elbow ttings 5 m 12 m
(*) semi-rigid ducts - (**) rigid ducts

13
3-11
3-12
e ducts must be tted to the
adjustable air intake and outlet
vents.
Specic cable duct.

14
3-13
3.6 ELECTRICAL CONNECTION FOR PLUS BOILER AND PHOTOVOLTAIC SYSTEM.
Legend:
A3 - Integrated P.C.B.
B2 - Storage tank NTC probe
K1 - Relay for DHW request
R1 - Resistor (2,2 K)
Legend:
A3 - Integrated P.C.B.
B2 - Storage tank NTC probe
N.B.: with this conguration the boiler
can show an error on DHW probe

15
3-14
Key:
1 - Compressor outlet temperature
probe
2 - Boiler board
3 - High evaporator probe
4 - MRL
5 - Air inlet probe
6 - Low evaporator probe
7 - Fan condenser - second speed
8 - fan
9 - Fan engage condenser
10 - User terminal board
11 - Immersion heater
12 - Domestic hot water sensor
13 - High pressure sensor
14 - Compressor protection thermostat
15 - Compressor engage condenser
16 - Compressor
17 - Hot gas valve
18 - Control panel
Colour code key:
BK - Black
BL - Blue
BR - Brown
G - Green
GY - Grey
G / Y - Yellow / Green
OR - Orange
P - Purple
PK - Pink
R - Red
W - White
Y - Yellow
W / BK - White / Black
3.7 BOILER WIRING DIAGRAM.
230 Vac
50 Hz
supply voltage
PV function
control
Boiler control

16
1
3
4 5
3-15
2
Probe housing for solar system or boiler (for
SOL versions only) (Fig. 3-15):
1 - Pull out the plug and foam insert beside the
internal exchanger.
2 - Push the probe through the plug (if it has a
suitable hole).
3 - Insert the probe into the conduit, ensuring
it is placed correctly at the bottom of the
housing.
4 - Put the foam insert back, and clip the plug
onto the product.
3.8 COMMISSIONING.
Filling the boiler.
- Open the hot water taps.
- Open the cold water cock on the safety device
(ensure the unit emptying valve is closed).
- Run the hot water from the cocks then close
them: the boiler will now be full.
- Check water tightness of the tting to the pipes.
- Check correct operation of plumbing devices
by opening the discharge valve
Commissioning.
PLEASE NOTE: if the boiler has been tilted, wait
at least 1 hour prior to commissioning.
- Turn on the boiler.
- Check that the screen (4 Fig. 4-1) does not
display errors.
- During rst power up the adjustment instruc-
tions are displayed on the screen. Follow the
on-screen instructions carefully to set param-
eters (date and time, air ducts, installation,
recirculation loop, photovoltaic, operating
bands, anti-legionella system).
- Aer setting the parameters, check the op-
eration of the boiler (see section "Operation
check").
To return to the settings, refer to section "System
Settings" or "Setup Parameters."
Operation check.
e parameters can be accessed in INSTALLER
MODE.
Hold down the Menu button (2 Fig. 4-1) and
turn the selector switch (1 Fig. 4-1) by a half
turn to the right.
To exit the installer mode, proceed in the same
way or wait for 3 minutes.
Access settings  ( )  Test  Generators.
e "TEST" menu allows you to start the actua-
tors of the device in Forced mode.
Compressor
Start of the
fan then of
the compres-
sor
Fan
Slow opera-
tion
Operation of
the fan at low
speed
Fast operation Operation
of the fan at
high speed
Defrosting fan Close
Emission of
a pop noise
from the coil
Compressor +
defrosting
Starting of
the fan, then
the compres-
sor and pop
noise of the
coil
Electrical
integration
Commis-
sioning of
electrical in-
tegration
Additional
boiler
Closure of
the boiler
dry piloting
contact
Temperature
sensors
Display of
tempera-
tures; Incom-
ing air, High
evaporator,
Low evapo-
rator, Return
compressor,
Hot water

17
3-16
3-17
8
9
4
1
235
6
7
A
2
1
3
A
3.9 THERMAL SOLAR CONNECTION DIAGRAM OPTIONAL.
3.10 BOILER SOLAR CONNECTION DIAGRAM OPTIONAL.
Key:
1 - Flat solar collectors
2 - Electronic control unit
3 - Single solar circulation
unit
4 - Expansion vessel
5 - Safety valve:
6 - System probe and venting
unit
7 - Mixing valve
8 - Rapax Sol V2 boiler
9 - Non return valve
A - Domestic hot water intake
Key:
1 - Boiler
2 - Rapax Sol V2 boiler
3 - Mixing valve
A - Domestic hot water
intake

18
4-1
1
2
3
4
4PARAMETER SETTINGS / UTILISATION
4.1 REMOTE PANEL.
Key:
1 - Main parameters switch with
button to conrm and save data
2 - Access key and settings lock
3 - Return button to the previous
screen
4 - Display
4.2 DESCRIPTION OF SYMBOLS.
Symbol Description
Forced start set
Absence set / pending
Current hot water temperature
Stand-by
Warning
Electrical integration in oper-
ation
Heat pump in operation
Boiler integration in operation
Reception of a signal at the inlet
of the solar system
Reception of a signal at the inlet
of the photovoltaic system /
Smart Grid
4.3 MAIN MENU.
Access to the settings by pressing the “Access
key and settings lock” () (2 Fig. 4-1) and
follow the instructions on the screen (4 Fig. 4-1).
Navigate the menu by turning the main switch
(1 Fig. 4-1) to the le to decrease the values or
to the right to increase the values.
Press the main switch in the centre (Fig 1. 4-1)
to conrm.
4-2
MENU
Funzione BOOST
Modalità MANUALE
Modalità ASSENZA
Informazioni
Impostazioni
Max. preparazione di acqua calda
in un periodo di tempo
programmato in ancipo
• BOOST function ( ).
Increase the production of hot water regularly;
Set the number of the BOOST operation days
(from 1 to 7). At the end of the chosen period,
the boiler resumes operation with the initial
settings. e BOOST can be interrupted at
any time:
BOOST pause .
• OPERATION mode ( ).
Chose the operating mode
Select AUTO or MANUAL (see section 4.6
"Operating modes").
• ABSENCE mode ( ).
Schedule an absence.
It allows you to indicate in the boiler:
- a permanent absence from the current date;
- a scheduled absence (set the start date of
the absence and the end date). On the eve
of your return, an anti-legionella cycle is
activated. In this period, the water temper-
ature is kept above 15°C. e function can
be stopped at any time:
Disable absence .
• Information ( ).
- Display the energy savings.
Allows you to view the utilization rate of
the heat pump and electrical integration
of the last 7 days, the last 12 months, from
commissioning.
- Display power consumption.
It allows you to view energy consumption in
kW / hour, in recent days, in recent months,
in recent years.
- Display the budget parameters.
It allows you to view all the settings recorded
in the boiler.
• Settings ( ).
- Set the time and date.
Set the day and then conrm. en set the
month, year, hour and minutes.
- Set the operating time slots
It lets you dene the time slots in which the
device is authorized to start.
- Set the language.
French, English, Dutch, Spanish, Portu-
guese, German, Italian and Polish.
- Electrical integration.
It allows you to turn o the support of elec-
trical integration.
BOOST function
Manual mode
ABSENCE mode
Information
Settings
Max. preparation of hot water
over a period of time
previously scheduled.

19
4.4 SYSTEM SETTINGS.
Access to the system settings: ( ) + Settings.
• Date and time.
Set the day and then conrm. Do the same for
the month, year, hour and minute.
• Operating time.
is parameter denes the operating time slots
of the heat pump, of the electrical integration,
and if present, of the hydraulic auxiliary device
according to the hot water requirements:
24/24 continuously Start at any time of
the day.
Scheduling Start in scheduled pe-
riods.
• Language.
Possible settings in French, English, Dutch,
Spanish, Portuguese, German, Italian and
Polish.
• Electrical integration.
It allows you to activate or not the electrical
integration support. If it is o, the device will
never use the electrical integration; in case of
low temperatures it is then possible a shortage
of hot water.
4.5 PARAMETERS TO BE ADJUSTED
UPON INSTALLATION.
(If not set at the time of commissioning)
e parameters can be accessed in INSTALLER
MODE.
Hold down the Menu button (2 Fig. 4-1) and
turn the selector switch (1 Fig. 4-1) by a half
turn to the right.
To exit the installer mode, proceed in the same
way or wait for 3 minutes.
Access to the system settings: ( )
Settings .
• Air ducts (aeraulic operation).
is parameter denes the aeraulic connection
type realized:
Inside / Inside Suction and return not
connected to air ducts
(ambient air)
Outside /
Outside
Suction and return con-
nected to air ducts (coated
air)
Inside /
Outside
Return connected to an air
duct (semi-coated)
• Installation (for products with coil).
Heat pump
only
e indoor heat exchanger
is not used
Connection
with boiler
e indoor heat exchanger
is connected to a boiler
controlled through the
device
Connection
with solar
system
e indoor heat exchanger
is connected to a solar
energy system
In "Boiler integration" it is asked to dene a
preference relating to the operation of priorities
between the boiler and the heat pump according
to 4 levels:
HP priority
The integration will be
only active at the end of
the heating for very low air
temperatures (<7°C)
HP
optimization
The integration will be
only active until the end
of the heating and ± early
depending on the air tem-
perature
Boiler
optimization
e heat pump is activated
at the end of the heating
and ± soon as a function
of air temperature
Boiler priority
e heat pump is active at
the beginning of heating
and for air temperature
>10°C.
•PV Photovoltaic system/Smart-grid.
is parameter allows to activate the device
coupled with a photovoltaic system. This
operating mode generates the forced starting
of the heat pump when the boiler receives a
signal coming from the photovoltaic system.
The setting automatically returns to the
previously selected mode aer 30 minutes if
the photovoltaic system signal is lost. While
receiving the signal the set point temperature
is automatically set at 62°C (not adjustable).
• Ventilation.
It allows you to turn on the air extraction
function (2 speeds: 300 or 390 m3/h). When
the unit does not heat domestic water, the
fan turns on to evacuate the ambient air to
the outside (only activated when the aeraulic
connection type is Indoor/Outdoor).
• Anti-legionella.
It allows you to turn on the water disinfection
function several times a month. e water
temperature reaches 62°C 1-4 times a month
depending on the desired setting.
• Emergency mode.
Enabling this mode allows continuous opera-
tion only with the electrical integration.
• Recirculation loop.
is mode should be strictly activated when
a domestic water recirculation system is
installed. e set point temperature is 65°C
and the operation of the heat pump adjusted
accordingly. e unit is authorized to operate
continuously (programming is not available).
4.6 SELECTION OF OPERATING
MODES.
e pressure on the button ( ) allows you to
access the menu Mode .
•In AUTO mode (only available on "ermo-
dynamic only” systems).
is operating mode automatically manages
the energy choice that allows maximum sav-
ings while guaranteeing an adequate comfort
in terms of hot water. e boiler analyses the
consumption of the previous days to adapt
the production of hot water according to
needs. It reacts to unexpected events to en-
sure the hot water making relaunches during
the day. erefore, the set point temperature
is automatically adjusted between 50 and
62°C according to the consumption prole.
e boiler operates preferably through the
heat pump. e electrical integration can be
automatically selected to ensure a sucient
volume of hot water.
PLEASE NOTE: this mode is not available on
the “Connection to the boiler” and “Connec-
tion to the solar system” plants.
• e MANUAL mode.
is mode allows you to dene the desired
amount of hot water by choosing the set
point. is set point is also represented as an
equivalence of number of showers (about 50
litres of hot water).
If the ECO mode is not active, the boiler fa-
vours operation with heat pump only. Howev-
er, if the air temperature is low or consumption
remarkable, the electrical integration (or boil-
er) can be authorized as a support at the end
of heating to reach the temperature set. If the
ECO mode is active, the boiler only works with
the heat pump at an air temperature ranging
between -5 and +43°C. erefore, the electri-
cal integration is not authorized at the time
of heating. is feature optimizes the savings,
but can cause hot water shortages. Regardless
of the ECO adjustment, if the air temperature
exceeds the operating time slots, the electrical
integration will be automatically selected to
ensure a sucient volume of hot water.
PLEASE NOTE: the ECO active/non active
modes are not available on “Connection to
the boiler” plants.
PLEASE NOTE: MANUAL modes and
“Connection to the solar system” plants: this
mode also allows the operation of the heat
pump in addition to the solar system. e
contemporary prolonged operation of the heat
pump and of the solar system may damage the
product. It is therefore necessary to allow the
operation of the heat pump only in the absence
of solar energy (use the time programming of
the heat pump).
• e BOOST mode.
is mode activates the heat pump and all
other available sources of energy (if declared
boiler integration, electrical integration)
simultaneously to the maximum set point
of 62°C.
• e ABSENCE mode.
is mode maintains the sanitary water tem-
perature above 15°C using the heat pump.
e boiler and electrical integrations can be
activated if the heat pump is not available.
•e RECIRCULATION mode.
is mode allows the heat pump to operate
continuously to reach the set point of 62°C.
e integrations (if declared boiler and elec-
tric) are activated aer 7 hours of heating with
the heat pump.

20
4-3
4.7 CONTROLS LOCK.
The pressure of the button (), for a few
seconds, allows you to lock/unlock the controls.
4.8 MODE IN “HEAT PUMP ONLY”
SYSTEM
• Auto.
e set point temperature is automatically
adjusted between 50 and 62°C according to
the consumption prole of the previous days.
e boiler operates preferably through the
heat pump. e electrical integration can be
activated automatically as support.
•MANUAL-ECO O.
e xed set point temperature is adjusted
between 50 and 62°C by the user. e boiler
operates preferably through the heat pump.
e electrical integration can be automati-
cally activated to ensure a sucient volume
of hot water.
•MANUAL-ECO On.
e xed set point temperature is adjusted
between 50 and 55°C by the user. e boiler
operates exclusively with the heat pump to
optimize the savings. e electrical integration
is authorized for operation only when the air
temperature exceeds the operating time slots.
4.9 MODE IN SYSTEM “CONNECTION
WITH THE BOILER".
• MANUAL.
e xed set point temperature is adjusted
between 50 and 62°C by the user. e boiler
operates preferably through the heat pump.
e electrical integration can be automatically
activated to ensure a sucient volume of hot
water. If the media by the boiler is not available
(in the boiler stop, for example), the electrical
integration will be activated.
• ”SMART Energy” function.
A heat pump draws the energy available in the
air and returns this energy in the hot water by
heat exchange in the tank. e performance
of a heat pump will then be higher with
parameters that facilitate these exchanges of
energy; that is to say with hot air and cold
water temperature in the tank. Our product
permanently calculates, depending on the
air temperature and the water temperature,
which energy is cheaper. is SMART Energy
function can decide to start heating with the
heat pump and reach the last degree with the
boiler integration.
In addition, you can set the Smart Energy
function with 4 dierent priority levels:
Water t.:
Air T°
Pump
pump.
Boiler
Priority
HP
HP
optimisation
Boiler
optimization
Priority
Boiler
HP priority
The integration will be
only active at the end of
the heating for very low air
temperatures (<7°C)
HP
optimisation
The integration will be
only active until the end
of the heating and ± early
depending on the air tem-
perature
Boiler optimi-
zation
e heat pump is active at
the end of the heating and
± early depending on the
temperature of the air
Boiler priority
e heat pump is active at
the beginning of heating
and for air temperature
equal to >10°C
4.10 MODE IN SYSTEM “CONNECTION
TO THE SOLAR SYSTEM”
e boiler only operates outside the solar energy
production periods (when it receives a signal
from the solar station). During sun production
periods the production of hot water is realized
by the internal heat exchanger therefore the heat
pump and the electric integration are inactive.
• MANUAL-ECO O
The fixed set point temperature is adjusted
between 50 and 62°C by the user. e boiler
operates preferably through the heat pump. e
electrical integration can be automatically acti-
vated to ensure a sucient volume of hot water.
• MANUAL-ECO On
e xed set point temperature between 50 and
55°C is adjusted by the user. e boiler operates
exclusively with the heat pump to optimize the
savings. e electrical integration is authorized
for operation only when the air temperature
exceeds the operating time slots.
PLEASE NOTE: the electrical integration will
never work if the “Electrical integration” is O.