Biasi 24S User manual

User manual and
installation
instructions
RINNOVA COND

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WARNING
Congratulations on choosing this product.
Your modulating boiler is electronically adjusted and ignited.
• It is highly efcient
• It has a sealed chamber.
Unlike traditional boilers, your condensing boiler makes it possible to recover energy by
condensing the water vapour contained in the ue gas. This means that, with equal heat
production, it consumes less gas, and the ue gas contains fewer substances that are
harmful to the environment.
The materials used and the control systems offer safety, high levels of comfort and energy
savings so you can appreciate the maximum advantages of autonomous heating.
GENERAL WARNINGS
This manual contains important information aimed at:
• Users (section 1);
• Installers (section 2);
• Maintenance technicians (section 3).
Users must read the instructions in the relevant section carefully (section 1).
Users must only perform work on the appliance where explicitly stated in the relevant
section.
Improper installation or assembly of the appliance and/or components, accessories, kits
and devices supplied with the product may cause unforeseeable problems for people,
animals or property. Please read the instructions provided with the product for information
on how to install the product correctly.
This instruction manual contains technical product installation information. As regards
other topics related to product installation (e.g. occupational safety, accident prevention
and protecting the environment), you must observe the legislation in force and codes of
practice.
Maintenance must be performed by qualied technicians e.g. at an authorised service
centre, so as to guarantee a professional service.
Any errors occurring during installation, or while using or servicing the appliance, caused
by a failure to observe the technical legislation and regulations in force or the instructions
in this manual (or otherwise provided by the manufacturer) will exclude the manufacturer
from all contractual and non-contractual liability for any damage caused and will void the
appliance warranty.

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WARNING
IMPORTANT
The manual must be read carefully to ensure rational and safe use of the boiler. It must
be stored with care as it may be necessary to consult it in the future. If the unit is trans-
ferred to another owner, the manual must accompany the boiler.
The initial switch-on must be carried out by an Authorised Service Centre; the validity of
the warranty starts from the date the product is purchased.
The manufacturer declines all liability for translations of this manual from which incorrect
interpretations may result. It cannot be considered responsible for failure to observe the
instructions contained in this manual or the consequences of any actions that have not
been specically described.
DURING INSTALLATION
After removing the packaging, make sure that the appliance is not damaged.
If damaged do not install or start up the appliance as it may be dangerous.
Contact your retailer or the nearest authorised service centre.
Installation must be carried out by qualied professionals who are responsible for com-
pliance with all applicable national and local laws and standards:
• the suitability of the installation site;
• the robustness of the wall intended for installation;
• the distance of the appliance from walls and surrounding objects;
• correct hook-up to the gas system;
• correct and safe set-up of the of air supply and combustion products evacuation sys-
tem;
• correct hook-up to the electrical power supply and earth circuit;
• compliance with the technical specications.
The boiler is used to heat water to a temperature that is lower than boiling point, and
must be connected to a heating system and/or a domestic hot water distribution network
that is compatible with its performance and power.
The boiler must be supplied with Methane gas (G20) or LPG (Propane G31).
The condensate discharge must be connected to the residential condensate outlet duct
and it must be possible to inspect it (UNI 7129-5 and related standards).
The boiler must only be used for the purpose for which it was designed. Furthermore:
• It must not be exposed to atmospheric agents.
• The appliance can be used by children no younger than 8 years old, by people with
physical, sensory or cognitive disabilities, and by people lacking experience or the nec-
essary knowledge, provided that they are supervised or have received instructions on
the safe use of the appliance and understand the inherent risks. Do not let children play
with the appliance. Do not allow unsupervised children to perform user maintenance
and cleaning.
• Prevent incorrect use of the boiler.
• Avoid making adjustments to the sealed devices.
• Avoid contact with hot parts during operation.

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WARNING
DURING USE
It is prohibited and dangerous to obstruct, even partially, the air intakes for the ventila-
tion of the room where the boiler is installed (UNI 7129-2 and related standards);
Repairs must only be carried out by authorised service centres using original spare parts.
Therefore, in the case of a problem, deactivate the boiler only (see instructions).
If you smell gas:
• Do not turn on electric switches, the telephone or any other object that could create
sparks.
• Immediately open up the doors and windows to create an air current that cleans the
room.
• Close the gas cocks.
• Request the intervention of professionally qualied personnel.
Before starting the boiler, have a qualied professional check that the gas supply sys-
tem:
• Is perfectly sealed.
• Is the right size for the required ow rate to the boiler.
• Is equipped with the safety and control devices required by current standards;
• Make sure that the installer has connected the safety valve drain to a outlet funnel.
The manufacturer is not responsible for damage caused by the water released when
the safety valve opens, if it is not correctly connected to a drainage system.
• Make sure that the installer has connected the condensate siphon drain to a specic
outlet funnel (UNI 7129-5 and related standards), which must be implemented in order
to avoid the condensate freezing and ensure it is correctly drained.
Near the boiler:
• there must be an all-pole disconnection switch to isolate the appliance from the electric
power supply;
• a gas shut-off valve to interrupt the ow of fuel.
Do not touch the unit with wet or damp body parts and/or in bare feet.
If performing structural work or maintenance near the ue gas ducts and/or the ue
gas exhaust devices or their accessories, turn off the unit and, when the work is complete,
have a qualied technician check the efciency.

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WARNING
DANGER: Instructions marked with this symbol must be observed to prevent
mechanical or generic accidents (e.g. injuries or bruises).
DANGER: Instructions marked with this symbol must be observed to avoid
electrical accidents (electrocution).
DANGER: Instructions marked with this symbol must be observed to avoid
the risk of re or explosions.
DANGER: Instructions marked with this symbol must be observed to avoid
heat-related accidents (burns).
WARNING: Instructions marked with this symbol must be observed to avoid
malfunctions and/or material damage to the unit or other items.
WARNING: Instructions marked with this symbol contain important informa-
tion that must be read carefully.
WARNING: Risk of cutting / stabbing. Protective gloves must be worn.
Appliance category: II2H3P (gas G20 20 mbar, G31 37 mbar)
Destination country: GB
This unit is compliant with the following European Directives:
• Regulation (EU) 2016/426 on appliances burning gaseous fuels
• Boiler Efciency Directive: Article 7(2) and Annex III of 92/42/EEC
• Electromagnetic Compatibility Directive 2014/30/EU
• Low Voltage Directive 2014/35/EU
• Directive 2009/125/EC Ecodesign requirements of energy-related products
• Regulation (EU) 2017/1369 Energy labelling
• Delegated regulation (EU) no. 811/2013
• Delegated regulation (EU) no. 813/2013
• Delegated regulation (EU) no. 814/2013 (where applicable)
In order to constantly improve its products, the manufacturer reserves the right to change the data pro-
vided in this documentation at any time and without notice.
This documentation is provided for information purposes and cannot be considered as a contract with
third parties.

TABLE OF CONTENTS
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TABLE OF CONTENTS
1 BOILER DESCRIPTION ............... 7
1.1 Assembly view........................ 7
1.2 Shut-off valves and cocks ............... 7
1.3 Control panel ......................... 8
1.4 General LCD characteristics ............. 8
2 USER INSTRUCTIONS . . . . . . . . . . . . . . . 10
2.1 Warnings ........................... 10
2.2 Ignition ............................. 10
2.3 Heating circuit temperature ............. 11
2.4 Domestic hot water temperature ......... 12
2.5 Shutdown........................... 12
3 USEFUL TIPS ...................... 14
3.1 Filling the heating circuit ............... 14
3.2 Heating ............................ 14
3.3 Antifreeze protection .................. 15
3.4 Periodic maintenance ................. 15
3.5 External cleaning ..................... 15
3.6 Operating anomalies .................. 15
3.7 Displays in INFO mode ................ 16
3.8 Flue thermal fuse..................... 17
4 TECHNICAL SPECIFICATIONS ........ 18
4.1 Assembly view....................... 18
4.2 Schematic diagram ................... 19
4.3 Wiring diagram ...................... 21
4.4 Technical data M275V.2024 SM ......... 22
4.5 Technical data M275V.2428 SM ......... 25
4.6 Technical data M275V.2832 SM ......... 28
4.7 Hydraulic characteristics ............... 31
4.8 Expansion vessel..................... 31
5 INSTALLATION ..................... 32
5.1 Warnings ........................... 32
5.2 Precautions for installation ............. 33
5.3 Installing the boiler bracket ............. 33
5.4 Dimensions ......................... 34
5.5 Fittings ............................. 34
5.6 Boiler assembly ...................... 34
5.7 ....... 35
5.8 Flue gas outlet dimensions and lengths ... 36
5.9 C63 .............. 39
5.10 Positioning the draught terminals ........ 40
5.11 Electrical connections ................. 41
5.12 Connecting a room thermostat or zone
valves ............................. 42
5.13 Electrical connection of the remote control
(optional) ........................... 43
5.14 Accessing installer parameters .......... 43
5.15 Enabling of operation with remote control
(optional) ........................... 43
5.16 Installing the external temperature sensor . 44
5.17 Electrical connection between the boiler
and the external sensor ................ 44
5.18 Enabling operation with the external
....... 44
5.19 Selecting the maximum heating
temperature setpoint with the climatic
curve set ........................... 47
5.20 Selecting the heating temperature set..... 47
5.21 Setting pump post-circulation ........... 48
5.22 Selecting re-ignition frequency .......... 49
5.23 Factory reset ........................ 50
5.24 Examples of hydraulic systems with
hydraulic separator (optional) ........... 50
6 PREPARATION FOR SERVICE ........ 52
6.1 Warnings ........................... 52
6.2 Sequence of operations................ 52
7 CHECKING THE GAS SETTING........ 55
7.1 Warnings ........................... 55
7.2 Gas operations and setting ............. 55
8 GAS CONVERSION ................. 59
8.1 Warnings ........................... 59
8.2 Gas operations and setting ............. 59
9 MAINTENANCE ..................... 61
9.1 Warnings ........................... 61
9.2 Removing the body panels ............. 61
9.3 Emptying the DHW circuit .............. 62
9.4 Emptying the heating circuit ............ 62
9.5 Cleaning the primary condensate
exchanger and the burner .............. 63
9.6 Check the pressure in the heating
expansion tank ...................... 64
9.7 Cleaning the domestic hot water exchanger 64
9.8 ..... 64
9.9 .............. 64
9.10 Checking the condensate discharge siphon 65
9.11 Setting the boiler's chimney sweep function 66
9.12 Settings for changing the control board.... 67
10BOILER DISPOSAL AND RECYCLING . . 71
Models
RINNOVA COND 24S M275V.2024 SM
RINNOVA COND 28S M275V.2428 SM
RINNOVA COND 32S M275V.2832 SM

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USER
BOILER DESCRIPTION
1 BOILER DESCRIPTION
1.1 Assembly view
The boiler model and serial number are
printed on the warranty certicate.
Figure 1.1
1
1 Control panel
1.2 Shut-off valves and cocks
Install a shut-off cock for the
DHW inlet.
The gures in this manual only
show one of the possible ways
of installing cocks, pipes and t-
tings.
Figure 1.2
2
4
3
5
6
7 8
9
11
10
2 Gas supply label
3 Heating circuit lling cock
4 Condensate outlet pipe
5 Heating delivery pipe
6 Domestic hot water outlet pipe
7 Gas cock
8 Heating circuit safety valve discharge
pipe
9 Heating return pipe
10 Domestic hot water inlet cock
11 Heating circuit drain cock

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USER
BOILER DESCRIPTION
1.3 Control panel
Figure 1.3
12
13
14
15
16
1718
12 Domestic hot water temperature in-
crease button
13 Domestic hot water temperature de-
crease button
14 LCD display
15 Heating temperature decrease button
16 Heating temperature increase button
17 Stand-by/Winter/Summer button
18 Reset button
1.4 General LCD characteristics
For the boiler technical specications, con-
sult the section "TECHNICAL SPECIFICA-
TIONS" on page 18.
Figure 1.4
bar
RESET
KEY
The symbol indicates a volatile
error. The boiler is reactivated
automatically once the fault
has been resolved
The symbol indicates that the
boiler can be restarted directly
by the user by pressing the re-
set button
All symbols with lines radiat-
ing from them indicate that the
symbol is ashing
LCD SIGNALS
LCD FUNCTION
E01 + Safety lockout due to
failed ignition
E02 + Lockout due to safety
thermostat
E03 + EEPROM error
E04 +
Pump circulation failure
or insufcient system
pressure
E05 + Fan control anomaly
E06 +
Heating NTC probe fail-
ure
E07 +
DHW NTC probe fail-
ure
E08 +
External NTC probe
failure
E09 +
Flue gas NTC probe
failure (interruption)
E10 +
Lockout due to tripping
of the ue gas probe
E11 + Parasite ame
E12 +
Return NTC probe fail-
ure

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USER
BOILER DESCRIPTION
LCD FUNCTION
Boiler with heating
power request.
The temperature of the
primary heating circuit
is displayed.
Burner ignition
(discharge)
Flame detected
(burner ignited)
Boiler in DHW an-
ti-freeze phase (the
symbol ashes)
Boiler in heating an-
ti-freeze phase (the
symbol ashes)
Heating set
(all other symbols are
disabled)
DHW set temperature
(all other symbols are
disabled)
Boiler in chimney
sweep function.
To activate the chim-
ney sweep function, set
“parameter P06≠0”.
1 = minimum power
2 = maximum DHW
power
3 = maximum heating
power
During the the chimney
sweep function, the
and/or symbols
do not ash.
LCD FUNCTION
E13 + High heating pressure
E14 +
Temperature gradi-
ent circulation failure
(>2K/s)
E22 +
Heating delivery tem-
perature between 90°C
and 100°C
E25 + Boiler in antifreeze
E26 + Gas valve fault
E28 + Tank NTC probe failure
E50 +
Communication with
remote control lost
E52 + Maximum number of
remote unlock attempts
E54 +
Heating water lling
function ended but
pressure is below min-
imum value for boiler
lling
E58 +
Heating water lling
function ended but
pressure is above max-
imum value for boiler
lling
Boiler off, (antifreeze
protection active)
Boiler in winter (heat-
ing/DHW) and stand-by
Boiler in summer (DHW
only) and stand-by
Boiler with DHW power
request.
The DHW temperature
is displayed.

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USER
USER INSTRUCTIONS
2 USER INSTRUCTIONS
2.1 Warnings
Check that the heating circuit is
correctly lled with water, even
if the boiler is only used for pro-
ducing domestic hot water.
If it is not, proceed with lling; see sec-
tion "Filling the heating circuit" on page
14.
All boilers have an antifreeze system that is
activated if the temperature falls below 5°C;
therefore do not turn off the boiler.
If the boiler is not used during cold periods,
with the resulting risk of freezing, follow the
instructions in section "Antifreeze protec-
tion" on page 15.
2.2 Ignition
• The boiler cocks and the cocks used
during installation must be open (Figure
2.1).
Figure 2.1
Open
position
• Power the boiler by turning on the multi-
way switch tted during installation. The
LCD display shows the OFF status (only
the heating and DHW antifreeze functions
are active) Figure 2.2.
Figure 2.2
bar
RESET
Heating/DHW operation
• Press and hold 17 until both symbols
and appear on the display.
Figure 2.3
12
13
14
15
16
1718
The LCD display shows the stand-by status
and the and symbols (Figure 2.4).
Figure 2.4
bar
RESET
Operation with production of hot water
only
• Press 17 until the symbol appears on
the display Figure 2.5.