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)