Biasi RINNOVA CV Series User manual

User manual and
installation
instructions
RINNOVA CV

- 2 -
WARNING
Congratulations on choosing this product.
Your modulating boiler is electronically adjusted and ignited.
• It is highly efcient
• It has a sealed chamber.
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.
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.

- 3 -
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 personnel who are responsible for compli-
ance with all applicable national and local laws and standards.
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 boiler must only be used for the purpose for which it was designed. Furthermore:
• It must not be exposed to atmospheric agents.
• This unit is not meant for use by people with reduced psychological or motor skills or
who lack experience and knowledge (including children), unless they are supervised by
a person responsible for their safety and have been properly instructed in using the unit.
• Children must be supervised to make sure they do not play with the unit.
• Prevent incorrect use of the boiler.
• Avoid making adjustments to the sealed devices.
• Avoid contact with hot parts during operation.

- 4 -
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 11071 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 11071 and related standards), which must be implemented in order
to avoid the condensate freezing and ensure it is correctly drained.
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.
Appliance category: II2H3P (gas G20 20 mbar, G31 37 mbar)
Destination country: IT
This unit is compliant with the following European Directives:
Gas Appliance Directive 2009/142/EC
Boiler Efciency Directive 92/42/EEC
Electromagnetic Compatibility Directive 2004/108/EC
Low Voltage Directive 2006/95/EC
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.

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TABLE OF CONTENTS
1 BOILER DESCRIPTION ............... 6
1.1 Assembly view........................6
1.2 Shut-off valves and cocks ...............6
1.3 Control panel .........................7
1.4 General LCD characteristics .............7
2 USER INSTRUCTIONS . . . . . . . . . . . . . . . . 9
2.1 Warnings ............................9
2.2 Ignition ..............................9
2.3 Heating circuit temperature .............10
2.4 Domestic hot water temperature .........11
2.5 Shutdown...........................12
3 USEFUL TIPS ...................... 13
3.1 Filling the heating circuit ...............13
3.2 Heating ............................13
3.3 Antifreeze protection ..................13
3.4 Periodic maintenance .................14
3.5 External cleaning .....................14
3.6 Operating anomalies ..................14
3.7 Displays in INFO mode ................15
4 TECHNICAL SPECIFICATIONS ........ 16
4.1 Assembly view.......................16
4.2 Schematic diagram ...................17
4.3 Wiring diagram ......................19
4.4 Technical data M290E.24CV ............20
4.5 Technical data M290E.28CV ............22
4.6 Technical data M290E.32CV ............24
4.7 Hydraulic characteristics ...............26
4.8 Expansion vessel.....................26
5 INSTALLATION ..................... 27
5.1 Warnings ...........................27
5.2 Precautions for installation .............27
5.3 Installing the boiler bracket .............28
5.4 Dimensions .........................28
5.5 Fittings .............................29
5.6 Boiler assembly ......................29
5.7 Installing the DHW tank ................30
5.8 Flue gas outlet dimensions and lengths ...30
5.9 Electrical connections .................36
5.10 Connecting a room thermostat or zone
valves .............................37
5.11 Accessing the "programming mode" . . . . . . 37
5.12 Electrical connection of the DHW tank
thermostat or NTC probe and setting .....38
5.13 Anti-legionella function ................39
5.14 Electrical connection of the remote control
(optional) ...........................40
5.15 Enabling of operation with remote control
(optional) ...........................40
5.16 Installing the external temperature sensor . 41
5.17 Electrical connection between the boiler
and the external sensor ................41
5.18 Enabling operation with the external
sensor and setting the K coefcient.......41
5.19 Selecting the maximum heating
temperature setpoint with the climatic
curve set ...........................43
5.20 Selecting the heating temperature set.....44
5.21 Setting pump post-circulation ...........45
5.22 Selecting re-ignition frequency ..........45
5.23 Examples of hydraulic systems with
hydraulic separator (optional) ...........46
6 PREPARATION FOR SERVICE ........ 48
6.1 Warnings ...........................48
6.2 Sequence of operations................48
7 CHECKING THE GAS SETTING........ 50
7.1 Warnings ...........................50
7.2 Gas operations and setting .............50
7.3 Setting burner ignition .................53
8 GAS CONVERSION ................. 55
8.1 Warnings ...........................55
8.2 Gas operations and setting .............55
9 MAINTENANCE..................... 57
9.1 Warnings ...........................57
9.2 Removing the body panels .............57
9.3 Emptying the DHW circuit ..............58
9.4 Emptying the heating circuit ............58
9.5 Cleaning the primary exchanger .........58
9.6 Check the pressure in the heating
expansion tank ......................58
9.7 Cleaning the domestic hot water exchanger 58
9.8 Cleaning the burner ...................59
9.9 Controlling the ue gas exhaust duct .....59
9.10 Checking boiler efciency ..............59
9.11 Setting the boiler's chimney sweep function 60
9.12 Settings for changing the control board....61
10BOILER DISPOSAL AND RECYCLING .. 64
Models and boiler certication code
RINNOVA M290E.24CV
RINNOVA M290E.28CV
RINNOVA M290E.32CV

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USE
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.
Install an isolation valve for the
gas inlet.
The gures in this manual only
show one of the possible ways
of installing cocks, pipes and t-
tings.
Figure 1.2
2
3 4
5
7
9
10
8
6
2 Gas supply label
3 Heating delivery pipe
4 Tank coil delivery pipe
5 Gas cock
6 Heating circuit safety valve discharge
pipe
7 Heating circuit lling cock
8 Heating circuit drain cock
9 Tank coil and heating return pipe
10 Heating circuit pressure gauge

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USE
BOILER DESCRIPTION
1.3 Control panel
Figure 1.3
11
12
13
14
15
1617
11 Domestic hot water temperature in-
crease button
12 Domestic hot water temperature de-
crease button
13 LCD display
14 Heating temperature decrease button
15 Heating temperature increase button
16 Stand-by/Winter/Summer button
17 Reset button
1.4 General LCD characteristics
For the boiler technical specications, con-
sult the section "TECHNICAL SPECIFICA-
TIONS" on page 16.
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 +
Flue gas pressure
switch anomaly
E06 +
Heating NTC probe fail-
ure
E07 +
DHW NTC probe fail-
ure
E08 +
External NTC probe
failure
E11 + Parasite ame
E12 +
Return NTC probe fail-
ure
E14 +
Temperature gradi-
ent circulation failure
(>2K/s)

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USE
BOILER DESCRIPTION
LCD FUNCTION
Boiler in DHW an-
ti-freeze phase (the
symbol ashes)
Boiler in heating an-
ti-freeze phase (the
symbol ashes)
Heating set tempera-
ture
(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 power
During the chimney
sweep function, the
and/or symbols
do not ash.
LCD FUNCTION
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
E68 +
Modulating operator
fault
E69 +
Incorrect boiler cong-
uration
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.
Boiler with heating
power request.
The temperature of the
primary heating circuit
is displayed.
Burner ignition
(discharge)
Flame detected
(burner ignited)

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USE
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
13.
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, proceed
as described in section "Antifreeze protec-
tion" on page 13.
2.2 Ignition
• The boiler cocks and the cocks used
during installation must be open (Figure
2.1).
The heating circuit lling cock
(7) must remain closed.
Figure 2.1
Open
position
7
•Power the boiler by turning on the two-
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 the 16 button and hold until both
symbols and appear on the dis-
play.
Figure 2.3
11
12
13
14
15
1617
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 the 16 button until the symbol
appears on the display.
The LCD display shows the stand-by status

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USE
USER INSTRUCTIONS
and the symbol (Figure 2.5).
Figure 2.5
bar
RESET
2.3 Heating circuit temperature
The heating delivery hot water temperature
can be adjusted using the 14 (decrease)
and 15 (increase) buttons (Figure 2.3) from
a minimum of approx. 28°C to a maximum
of approx. 55°C or from a minimum of ap-
prox. 50°C to a maximum of approx. 80°C
(see "Selecting the heating temperature
set" on page 44). The rst time one of
these two buttons is pressed the “set” value
is displayed; the second time it is pressed
this can be changed.
Signal on the LCD display:
• the “set” value of the heating delivery hot
water temperature and the symbol
ash. The display background lights up
(Figure 2.6).
Figure 2.6
bar
RESET
Adjusting the heating temperature based
on the outdoor temperature (without ex-
ternal sensor)
Adjust the heating delivery hot water tem-
perature as follows:
• from 27 to 35 with an outdoor temperature
of between 5°C and 15°C
• from 35 to 60 with an outdoor temperature
of between -5°C and +5°C
• from 60 to 80 with an outdoor temperature
of below -5°C.
Your qualied installer may suggest more
suitable settings for your system.
The set temperature has been reached
when the symbol is not visible on the
LCD display.
Heating power demand
When the boiler receives a heating power
request, the display shows the symbol
followed by an increase in the heating de-
livery water temperature. The symbol
ashes (Figure 2.7).
Figure 2.7
bar
RESET
Adjusting the heating temperature with
an external sensor installed
When the optional external sensor is in-
stalled, your boiler will automatically adjust
the heating system's delivery water tem-
perature according to the outdoor tempera-
ture.
In this case, the boiler must be set by a
qualied installer (see "Enabling operation
with the external sensor and setting the K
coefcient" on page 41).
If the room temperature is not comfortable,
you can increase or decrease the heating
system delivery temperature by ± 15°C us-
ing the 14 (decrease) and 15 (increase) but-
tons (Figure 2.3).

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USE
USER INSTRUCTIONS
2.4 Domestic hot water tempera-
ture
With hot water tank connected and hot
water tank NTC probe:
The temperature of the hot water contained
in the tank can only be set if the hot water
tank is operated with the NTC probe that
detects the temperature.
The temperature of the domestic hot water
contained in the tank can be adjusted to a
maximum of approx. 60°C, using buttons 11
(increase) and 12 (decrease) (Figure 2.8).
Figure 2.8
11
12
13
14
15
1617
The rst time one of these two buttons is
pressed the “set” value is displayed; the sec-
ond time it is pressed this can be changed.
Signal on the LCD display:
• the “set” value of the domestic hot water
and the symbol ash. The display
background lights up (Figure 2.9).
Figure 2.9
bar
RESET
If the quantity of lime scale contained in the
water is particularly high, it is recommended
to install a small water softener.
To avoid any risks due to the possible for-
mation of micro-organisms (legionella) in
the domestic hot water, the anti-legionella
function can be activated (see "Anti-legio-
nella function" on page 39).
This function raises the temperature of the
water contained in the hot water tank to
above 65°C for a dened period of time,
which eliminates any microorganisms that
are present.
With hot water tank connected and hot
water tank thermostat:
The temperature of the hot water tank coil
delivery water can be changed using but-
tons 11 (increase) and 12 (decrease) (Fig-
ure 2.8).
The rst time one of these two buttons is
pressed the “set” value is displayed; the sec-
ond time it is pressed this can be changed.
Signal on the LCD display:
• the “set” value of the domestic hot water
and the symbol ash. The display
background lights up (Figure 2.10).
Figure 2.10
bar
RESET
For optimal hot water tank efciency, it is
recommended to set the hot water tank coil
delivery water temperature to the maximum.
N.B.: The temperature displayed is the
hot water tank coil delivery temperature
and not the actual temperature of the do-
mestic hot water.
Domestic hot water demand
When the boiler receives a request for do-
mestic hot water, the display shows the

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USE
USER INSTRUCTIONS
symbol followed by an increase in the
temperature of the domestic hot water. The
symbol ashes (Figure 2.11).
Figure 2.11
bar
RESET
2.5 Shutdown
Press the 16 button (Figure 2.12) until the
message OFF appears on the LCD display
(Figure 2.13).
Figure 2.12
11
12 14
15
1617
Figure 2.13
bar
RESET
In OFF mode, the antifreeze protection is
active.
If the boiler will be inactive for a long period
of time:
• Disconnect the boiler from the electric
power supply;
• Close the boiler cocks Figure 2.14;
Figure 2.14
Closed
position
• If necessary, empty the hydraulic circuits
(see section "Emptying the DHW circuit"
on page 58 and section "Emptying the
heating circuit" on page 58).

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USE
USEFUL TIPS
3 USEFUL TIPS
3.1 Filling the heating circuit
Figure 3.1
OPEN
CLOSED
Heating circuit
lling cock
Open the lling cock in Figure 3.1 located
under the boiler and check the heating cir-
cuit pressure on the pressure gauge at the
same time. The correct cold system pres-
sure value should be within the rst green
bar on the pressure gauge quadrant (Figure
3.2).
Figure 3.2
When the operation is complete, close the
lling cock and bleed any air from the ra-
diators.
3.2 Heating
For rational and economical service, have a
room thermostat installed.
Never turn off the radiator in the room where
the room thermostat is installed.
If a radiator (or convector) does not heat up,
check if there is any air in the system and
make sure that the cock is open.
If the room temperature is too high, do not
adjust the radiator cocks but decrease the
heating temperature setting using the room
thermostat or the heating control buttons 14
and 15 (Figure 3.3).
Figure 3.3
11
12
13
14
15
1617
3.3 Antifreeze protection
The antifreeze system, and any addition-
al protective devices, safeguard the boiler
against possible damage due to freezing.
This system does not guarantee protection
for the entire hydraulic system.
Where the outdoor temperature could fall
below 0°C, it is recommended to leave the
entire system on, setting the room thermo-
stat to a low temperature.
The antifreeze function is active even if the
boiler is in OFF (Figure 3.4).

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USE
USEFUL TIPS
Figure 3.4
bar
RESET
If the boiler is turned off, have a qualied
technician empty the boiler (heating and
DHW circuit) and empty the heating system
and the DHW system.
3.4 Periodic maintenance
For efcient and regular boiler operation, it
is recommended that the boiler be serviced
and cleaned at least once a year by a tech-
nician from an authorised service centre.
During this check, the most important boil-
er components are inspected and cleaned.
This check may be performed within the
scope of a maintenance contract.
3.5 External cleaning
Before performing any cleaning
operation, disconnect the boiler
from the electric mains supply.
To clean, use a cloth soaked in soap and
water.
Do not use: Solvents, ammable substanc-
es or abrasive substances.
3.6 Operating anomalies
If the boiler is not working and an error code
ashes on the display and the symbol
is shown, it is a volatile lockout. The boiler
is reactivated automatically once the fault
has been resolved (see "General LCD char-
acteristics" on page 7); the boiler is in
lockout mode (Figure 3.5).
Figure 3.5
bar
RESET
Each fault is classied accord-
ing to the level of priority. If
more than one faults are detect-
ed at the same time, the most
urgent error code is shown.
Frequent safety lockouts should
be reported to an authorised
service centre.
Other possible anomalies shown on the
LCD display
If an error code, the symbol and the
symbol are shown on the LCD dis-
play, the lockout is NOT volatile (Figure 3.6).
Figure 3.6
bar
RESET
To restore operation, press the reset button
17 (Figure 3.3) on the boiler control panel.
Air bubble noises
Check the pressure of the heating circuit
and ll it if necessary, see section "Filling
the heating circuit" on page 13.
Low system pressure
Add more water to the heating system.
To do this, refer to section "Filling the heat-
ing circuit" on page 13.

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USE
USEFUL TIPS
The user is responsible for periodically
checking the pressure of the heating sys-
tem.
If water needs to be added too often, have
the technical support centre check if there
are any leaks in the heating system or the
boiler itself.
Water leaks from the safety valve
Check if the lling cock is closed tightly (see
"Filling the heating circuit" on page 13).
Check on the pressure gauge that the heat-
ing circuit pressure is not close to 3 bar.
Should this be the case, drain a part of the
water from the system through the air relief
valves in the radiators in order to reduce the
pressure to a normal value.
In the case of malfunctions oth-
er than those described above,
shut down the boiler as de-
scribed in section "Shutdown"
on page 12 and call a techni-
cian from the authorised service
centre.
3.7 Displays in INFO mode
INFO mode is used to view boiler status in-
formation. In the case of a boiler malfunc-
tion, provide this information to the service
centre so that they can work out its causes.
To access INFO mode, press 17 (Figure
3.3) and hold for 5 seconds until the code
n02 shows on the display (Figure 3.7).
Figure 3.7
bar
RESET
To scroll through the values, press 11 (in-
crease) and 12 (decrease). Press 16 and
hold for 5 seconds to exit INFO mode (Fig-
ure 3.3).
The table summarises the possible values
visible in INFO mode.
Table of
contents
Value shown
n02 DHW output temp.
n03 NTC return temperature (not
present)
n04 (not used)
n05 Outdoor temperature
n08 (not used)
n09 Modulating operator current
n11 DHW ow rate
n14 PWM pump speed
percentage
n15 (not used)
n20 (not used)
n21 Last error code
n22 Second-to-last error code
n26 Calculated heating set
point (with climatic curve or
congured set)

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INSTALLATION
TECHNICAL SPECIFICATIONS
4 TECHNICAL SPECIFICATIONS
4.1 Assembly view
Figure 4.1
19
34
37
20
29
36
32
31
25 10
22
6
21
23
30
24
8
18
33
40
41 39 38

- 17 -
INSTALLATION
TECHNICAL SPECIFICATIONS
Figure 4.2
3 Heating delivery pipe
4 Tank coil delivery pipe
5 Gas cock
6 Heating circuit safety valve discharge
pipe
7 Heating circuit lling cock
8 Heating circuit drain cock
9 Tank coil and heating return pipe
10 Heating circuit pressure gauge
18 Heating NTC - Max temperature NTC
19 Primary exchanger
20 Flame detection electrode/ignition
electrode
21 3 bar safety valve
4.2 Schematic diagram
39
40
34
19
20
37
36
33
2527
38
23
30
31
21
5 9
8
3
7 4
28
26
22
32
35
18
42

- 18 -
INSTALLATION
TECHNICAL SPECIFICATIONS
22 Automatic bleed valve
23 Pump
24 Pump bleed cap
25 Gas valve
26 Gas valve outlet tapping point
27 Modulating operator
28 Gas valve inlet tapping point
29 Control panel containing:
Terminal board for external temperature
probe, low-voltage ambient thermo-
stat cable or remote control (optional),
thermostat or hot water tank sensor,
electric power supply cable
30 Heating pressure switch
31 Three-way valve
32 Three-way valve plug
33 Fan
34 Flue gas pressure switch
35 Venturi
36 Combustion chamber
37 Burner
38 Expansion tank
39 Flue gas exhaust duct
40 Air suction duct
41 Venturi vacuum check points
42 Integrated by-pass
* To access the Data plate, remove the front
panel from the body as described in the
Maintenance section.

- 19 -
INSTALLATION
TECHNICAL SPECIFICATIONS
Figure 4.3
4.3 Wiring diagram
N
cm
L
mg/v
c
g/v
nn
M
~
c n
b
b
b
t t
3
1
4
2
n
c
g/v
grcm
rgcgrbm
gbrmcgr
bc
b
grgr
nn
n
n
rr
b
m
bm
c
gr
c
1
3
4
g/v
gr
gr
nn
cmg/v
M
~
COM(1)
NO (3)
b
b
bccnn
c
r
b
r
c
25
7
8
9101112
1 3 4 6
aorange
bwhite
cblue
gyellow
gr grey
mbrown
nblack
rred
vpurple
g/v yellow/green
1Electrical power
supply 4Pump 7Boiler thermostat 10 Heating pressure
switch
2Gas valve 5Ignition and detection
electrode 8Boiler NTC probe 11 Flue gas pressure
switch
3Fan 6Remote control / room
thermostat cable 9NTC heating - Max NTC
temperature 12 Three-way valve

- 20 -
INSTALLATION
TECHNICAL SPECIFICATIONS
4.4 Technical data M290E.24CV
(nom.Q.) Nominal heating/d.h.w.
heat input (Hi)
kW 25,5
kcal/h 21926
(nom.Q.) Minimum heat input (Hi)
for heating
kW 11
kcal/h 9458
(nom.Q.) Minimum d.h.w. heat input
(Hi)
kW 11,0
kcal/h 9458
Maximum output power for heat-
ing/d.h.w.
kW 23,7
kcal/h 20378
Minimum output power for heating kW 9,8
kcal/h 8426
Minimum output power for d.h.w. kW 9,8
kcal/h 8426
Measured efciency
Nominal efciency 60°/80°C % 92,8
Min. efciency 60°/80°C % 89,2
Efciency at 30 % of load % 90,7
Energy efciency * * *
Heat loss at the chimney with burner
operating Pf (%) 6,3
Heat loss at the chimney with burner
off ΔT 50°C Pfbs (%) 0,2
Heat loss towards the environment
through the casing with the burner
operating
Pd (%) 0,9
NOx class 2
Weighted NOx *** mg/kWh 168
ppm 95
Heating
Adjustable temperature ** °C 38 - 85
Max. operating temp. °C 90
Maximum pressure kPa 300
bar 3,0
Minimum pressure kPa 30
bar 0,3
Available pressure difference (at
1000 l/h)
kPa 20,4
bar 0,204
** At minimum useful power
Domestic hot water
Temp. Minimum-Maximum °C 35 - 60
* Reference standard EN 625
Gas supply pressures
Gas Pa mbar
Methane G20
Nom. 2000 20
Min. 1700 17
Max. 2500 25
Propane G31
Nom. 3700 37
Min. 2500 25
Max. 4500 45
Electrical data
Voltage V 220
Frequency Hz 50
Electric power W 107
Degree of protection IPX5D