Sime Murelle Pro HE 25 HO ErP User manual

BRAVA DGT HE
25 - 30 - 35
199838
INSTALLATION AND SERVICING INSTRUCTIONS
ENSURE THAT THESE
INSTRUCTIONS ARE LEFT
FOR THE USER AFTER
COMPLETION OF THE
BENCHMARK SECTION
PLEASE READ THE
IMPORTANT NOTICE
WITHIN THIS GUIDE
REGARDING YOUR BOILER
WARRANTY
UK Cod. 6316191 - 08/2013
BRAVA DGT HE
25 - 30 - 35
199838
INSTALLATION AND SERVICING INSTRUCTIONS
ENSURE THAT THESE
INSTRUCTIONS ARE LEFT
FOR THE USER AFTER
COMPLETION OF THE
BENCHMARK SECTION
PLEASE READ THE
IMPORTANT NOTICE
WITHIN THIS GUIDE
REGARDING YOUR BOILER
WARRANTY
UK Cod. 6316191 - 08/2013
6322852 - 04/2015 - R1
BRAVA DGT HE
25 - 30 - 35
199838
INSTALLATION AND SERVICING INSTRUCTIONS
ENSURE THAT THESE
INSTRUCTIONS ARE LEFT
FOR THE USER AFTER
COMPLETION OF THE
BENCHMARK SECTION
PLEASE READ THE
IMPORTANT NOTICE
WITHIN THIS GUIDE
REGARDING YOUR BOILER
WARRANTY
UK Cod. 6316191 - 08/2013
BRAVA DGT HE
25 - 30 - 35
199838
INSTALLATION AND SERVICING INSTRUCTIONS
ENSURE THAT THESE
INSTRUCTIONS ARE LEFT
FOR THE USER AFTER
COMPLETION OF THE
BENCHMARK SECTION
PLEASE READ THE
IMPORTANT NOTICE
WITHIN THIS GUIDE
REGARDING YOUR BOILER
WARRANTY
UK
Cod. 6316191 - 08/2013
please position here a sticker
from installation pack
BOILER DETAILS
NUOVA
FOTO
USER, INSTALLATION AND SERVICING INSTRUCTIONS
MURELLE PRO HE 25 HO ErP
Condensing wall mounted boiler

2
SAFE HANDLING
IMPORTANT NOTICE
For the first year all of our appliances are protected by our manufacturer’s guarantee which covers both parts and
labour.
As you would expect from Sime Ltd, it is our aim to provide our valued customers with the best in after sales and
service.
To take advantage of any extended warranty offered, all you have to do is to adhere to these 3 simple conditions:
The installation must be carried out to Manufacturers/Benchmark Standards by a Gas Safe Registered
Engineer, and recorded in the installation manual.
The appliance must be registered with both Sime Ltd and Gas Safe within 30 days of installation.
The appliance must be serviced every 12 months, within 30 days of the anniversary of the installation date, by either
Sime Ltd or a Gas Safe registered engineer- ensuring that the Benchmark service record in the installation
manual is completed.
Failure to comply with the above will result in only the 12 month warranty being offered.In the absence of any proof
of purchase, the 12 month warranty period will commence from the date of manufacture of the boiler as shown on the
appliance data plate.
This boiler may require 2 or more operatives to move it into its installation site, remove it from its packaging and
during movement into its installation location. Manoeuvring the boiler may include the use of a sack truck and involve
lifting pushing and pulling.
Caution should be exercised during these operations.
Operatives should be knowledgeable in handling techniques when performing these tasks and the following precau-
tions should be considered:
– Grip the boiler at the base
– Be physically capable
– Use personal protective equipment as appropriate e.g. gloves, safety footwear.
During all manoeuvres and handling actions, every attempt should be made to ensure the following unless unavoi-
dable and/or the weight is light.
– Keep back straight
– Avoid twisting at the waist
– Always grip with the palm of the hand
– Keep load as close to the body as possible
– Always use assistance
WARNING
Caution should be exercised when performing any work on this appliance.
Protective gloves and safety glasses are recommended.
– Avoid direct contact with sharp edges.
– Avoid contact with any hot surfaces.
NOTICE
Please be aware that due to the wet testing of the appliance, there may some residual water in the hydraulic circuit.
– Protect any surfaces, carpets or floorings.
– Use a suitable container to catch any water that escape when removing the protective caps from the connections.
All descriptions and illustrations provided in this manual have been carefully prepared but we reserve the right to make
changes
and improvements in our products that may affect the accuracy of the information contained in this manual.

3

4
The Benchmark Scheme
Sime Ltd is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and
commissioning of domestic heating and hot water systems in the UK and to encourage regular servicing to optimise
safety, efficiency and performance.
Benchmark is managed and promoted by the Heating and Hotwater Industry Council.
For more information visit www.centralheating.co.uk.
Please ensure that the installer has fully completed the Benchmark Checklist in the use and maintenance section of
the installation instructions supplied with the product and that you have signed it to say that you have received a full
and clear explanation of its operation.
The installer is legally required to complete a commissioning checklist as a means of complyng with the appropriate
Building Regulations (England and Wales).
All installations must be notified to Local Area Building Control either directly or through a Competent Persons
Scheme.
A Building Regulations Compliance Certificate will then be issued to the customer who should, on receipt, write the
Notification Number on the Benchmark Checklist.
This product should be serviced regularly to optimise its safety, efficiency and performance.
The service engineer should complete the relevant Service Record on the Benchmark Checklist after each service.
The Benchmark Checklist may be required in the event of any warranty work and as supporting documentation
relating to home improvements in the optional documents section of the Home Information Pack.
Please refer to commissioning instructions for filling in the checklist at the back of this installation guide.
Note: All Gas Safe registered installers carry a ID Card.
You can check your installer is Gas Safe Registered by calling 0800 408 5577
SIME COMBINATION BOILERS
Installer checklist
Important Information
IT IS A STATUTORY REQUIREMENT THAT ALL GAS APPLIANCES ARE INSTALLED BY COMPETENT PERSONS,
IN ACCORDANCE WITH THE GAS SAFETY (INSTALLATION AND USE) REGULATIONS (CURRENT EDITION). The
manufacturer’s instructions must not be taken as overriding any statutory requirements, and failure to comply
with these regulations may lead to prosecution.
No modifications to the appliance should be made unless they are fully approved by the manufacturer.
GAS LEAKS: DO NOT OPERATE ANY ELECTRICAL SWITCH, OR USE A NAKED FLAME. TURN OFF THE GAS SUPPL
Y
AND VENTILATE THE AREA BY OPENING DOORS AND WINDOWS CONTACT THE GAS EMERGENCY SERVICE
ON
0800111999.
Please remember to carry out the following checks after installation. This will achieve complete customer
satisfaction, and avoid unnecessary service calls. A charge will be made for a service visit where the fault is not
due to a manufacturing defect.
Has a correct by-pass been fitted and adjusted?
Has the system and boiler been flushed?
Is the system and boiler full of water, and the correct pressure showing on the pressure gauge?
Is the Auto Air Vent open?
Has the pump been rotated manually?
Is the gas supply working pressure correct?
Is the boiler wired correctly? (See installation manual).
Has the D.H.W. flow rate been set to the customer requirements?
Has the customer been fully advised on the correct use of the boiler, system and controls?
Has the Benchmark Checklist in the use and maintenance section of this manual, been completed?
––

5
SAFETY WARNINGS AND REGULATIONS
m
WARNINGS
– After having unpacked the boiler ensure that it
is undamaged and complete including the valve
pack, hanging bracket and template.
– The appliance must be used as intended.
Sime
declines all responsible for any injury or damage
to persons, animals,or property as a result of
improper installation, adjustment, maintenance
or use.
– In the event of water leaks, disconnect the
appliance from the mains power supply, close
the water mains and seek help from a qualified
engineer.
– Periodically check that the operating pressure of
the water heating system when cold is
1-1,2 bar . If
required, increase the pressure or seek help from
a qualified engineer (sealed systems).
– If the appliance is not used for a long period of
time, the following operations must be carried out:
-
set the main isolation switch to "OFF";
- close the gas cock.
– To ensure continued efficient operation of the
appliance it is recommended that it is serviced
regularly, at least once a year. This is also a
condition of the boiler warranty.
– It is the law that any service or repair is carried out
by a Gas Safe Registered engineer.
– Services must be recorded in the maintenance
section of this installation guide.
m
WARNINGS
– This manual is an integral part of the appliance. It
must therefore be kept for future reference and
must always accompany the appliance in the event
the appliance is transferred or sold to another
Owner or User or is installed on another system.
–
Installation and maintenance of this appliance must
be carried out by a Gas Safe Registered Engineer in
accordance with the instructions contained in the
manual. On completing the installation the boiler
should be commissioned and details recorded in
the Benchmark section of this manual. This is a
condition of the warranty
RESTRICTIONS
d
DO NOT
– Do not allow appliance to be used by children or
unassisted disabled persons.
– Do not use electrical devices or appliances such
as switches, electrical appliances etc if you can
smell gas. If this should happen:
-
open the doors and windows to air the room;
- close the gas isolation device;
- seek help from a qualified engineer.
– Do not touch the appliance with bare feet or with
any wet part of the body.
– Do not carry out any repair, maintenance or
cleaning operation before having disconnected
the appliance from the mains power by setting the
main switch to "OFF", and closing the gas supply.
– Do not modify the safety or adjustment devices
without authorization and instructions from the
manufacturer.
– Do not block the condensate drain.
– Do not pull, detach or twist the electrical cables
coming out of the appliance even if the appliance is
disconnected from the mains power supply.
– Do not expose the boiler to atmospheric agents.
These boilers can also be installed in partially
covered areas, as per EN 15502, with a maximum
ambient temperature of 60°C and a minimum
ambient temperature of - 5°C. It is generally
advisable to install the boilers below weathered
roofs, on the balcony or in a protected niche, to
protect them from exposure to weathering agents
(rain, hail and snow). All boilers provide a standard
antifreeze function.
– Do not block or reduce the size of the ventilation
openings of the room where the appliance is
installed, if present.
– Remove the mains power and gas supply from the
appliance if the external temperature could fall
below ZERO (risk of freezing).
– Do not leave containers with flammable
substances in the room where the appliance is
installed.
– Do not place or store items on or close to the
appliance.
SYMBOLS
a
DANGER
To indicate actions which, if not carried out correctly, can result in injury of a general nature or may damage or cause the
appliance to malfunction; these actions therefore require particular caution and adequate preparation.
f
DANGER
To indicate actions which, if not carried out correctly, could lead to injury of an electrical nature; these actions therefore
require particular caution and adequate preparation.
d
DO NOT
To indicate actions which MUST NOT BE carried out.
m
CAUTION
To indicate particularly important and useful information.

6
RANGE
MODEL CODE GAS COUNCIL
NUMBER
Murelle Pro HE 25 HO ErP
(G20) 8114270 41-283-42
COMPLIANCE
Murelle Pro HE HO ErP boilers comply with:
– Gas Appliances Directive 2009/142/EC
– Boiler Efficiency Directive 92/42/EEC
– Low Voltage Directive 2006/95/EC
– Electromagnetic Compatibility Directive 2004/108/EC
– Thermal Efficiency
– Classified as "Condensing"
– Class NOx 5 (< 70 mg/kWh)
1312
Please refer to the technical data plate for the serial number
and year of manufacture.
EC DECLARATION OF CONFORMITY
In accordance with "Gas Appliances" Directive 2009/142/
EC, "Electromagnetic Compatibility" Directive 2004/108/
EC, "Boiler Efficiency" Directive 92/42/EC and "Low Voltage"
Directive 2006/95/EC, the manufacturer Fonderie SIME
S.p.A., via Garbo 27, 37045 Legnago (VR),
DECLARES THAT the
boiler models
Murelle Pro HE HO ErP comply with the European
Directives.
These appliances comply with the S.E.D.B.U.K. scheme,
band “A”.
The Technical Manager
(Franco Macchi)
MANUAL STRUCTURE
This manual is organized as follows.
USER INSTRUCTIONS
TABLE OF CONTENTS 7
DESCRIPTION OF THE APPLIANCE
TABLE OF CONTENTS 11
INSTALLATION AND SERVICING
INSTRUCTIONS
TABLE OF CONTENTS 19

7
USER INSTRUCTIONS
TABLE OF CONTENTS
1 OPERATING THE MURELLE PRO HE 25 HO ErP 8
1.1 Control panel ...................................8
1.2 Preliminary checks ..............................8
1.3 Ignition ........................................9
1.4 Adjusting the delivery temperature .................9
1.5 Fault / malfunction codes .........................9
2 SHUTDOWN 9
2.1 Temporary shutdown.............................9
2.2 Shutting down for long periods ....................9
3 MAINTENANCE 10
3.1 Servicing......................................10
3.2 External cleaning...............................10
3.2.1 Cleaning the case ..................... 10
4 DISPOSAL 10
4.1 Disposal of the equipment (European Directive
2002/96/CE....................................10

8
1 OPERATING THE MURELLE PRO HE 25 HO ErP
1.1 Control panel
1 4
2 2
2 2
2
3
Fig. 1
1 KNOBS
tThe heating knob allows the user to set the flow
temperature to between 20 and 80°C during normal
operation.
2 FUNCTIONAL BUTTONS
sPress for more than one second and release to step
through the operating modes (Stand-by – Summer –
Winter).
<This allows the engineer to scroll through the
parameters or decrease the values.
>This allows the engineer to scroll through the
parameters or increase the values.
oThis allows the engineer to confirm the selected
parameter or to modify the value or to reset the
appliances from a lockout failure.
cProgramming connector cover plug.
NB: pressing any one of these buttons for more than 30
seconds generates a fault on the display without preventing
boiler operation. The warning disappears when the button is
released.
3 DISPLAY
l
“SUMMER” . This function is NOT USED on these boilers.
This symbol appears when the boiler is operating in
Summer mode (used when commissioning the boiler).
If the symbols land nare flashing, this indicates
that the chimney sweep function is active.
n
“WINTER” . This symbol appears when the boiler is
operating in Winter mode. If no operating modes have
been enabled both symbols land nwill be off.
R
“RESET REQUIRED” . This message only appears if there
is a malfunction which must be or may be restored
manually.
r
“DOMESTIC HOT WATER” . This function IS NOT USED on
these boiler models.
t
“HEATING” . This symbol is present during heating
operation or when the chimney sweep function is
operating; it flashes during the heating set point
selection.
f
“LOCKOUT” DUE TO NO FLAME .
F
“FLAME LIT” .
K
“ALARM” . This indicates that a fault has occurred.
The number specifies the cause which generated the
alarm (see section "Fault / malfunction codes".
4 (Not used on these boilers)
1.2 Preliminary checks
Prior to use the Murelle Pro HE HO ErP boiler must be installed
and commissioned by a Gas Safe Registered engineer. It may
be necessary for the user to occasionally have to start the
boiler, for instance after a holiday or after an interruption of
the gas supply. In these cases the following operations must
be carried out.
– check that the gas isolation valve is open
– check that the pressure in the heating system, when cold,
is
1-1.2 bar . If the pressure is less than this use the external
filling device to repressurise the system to
1-1.2 bar (sealed
systems only)
– ensure that the filling device is turned off after use.

9
1.3 Ignition
After having carried out the preliminary checks, proceed as
follows:
– set the main system switch to "ON"
– put the boiler into "WINTER" mode n, by pressing the
button stwice for at least one second each time, until the
"WINTER" n, is displayed. The internal boiler temperature
will be appear on the display
– ensure that any timers and room thermostats are in the on
position. The twill appear on the display and the boiler
will ignite.
1.4 Adjusting the delivery temperature
The temperature of the heating water can be adjusted by
turning the tknob on the control panel.
Fig. 2
1.5 Fault / malfunction codes
If a fault/malfunction is detected during boiler operation, the
message
“A L” will appear on the display followed by the fault
code (eg.
“06” - no flame detected).
If the message
“RESET” also appears, press and hold the
button oRfor more than 3 seconds and check that the
normal operating condition is restored.
If this operation is not successful, ONLY ONE MORE ATTEMPT
can be made, therefore:
– close the gas cock
– isolate the power supply
– contact the Qualified Technical Personnel.
m
CAUTION
The table with the fault codes and the corresponding
description is provided in the specific section of the
INSTALLATION AND SERVICING INSTRUCTIONS.
2 SHUTDOWN
2.1 Temporary shutdown
To temporarily interupt the boiler operation press and hold
the button sfor at least one second, once if in "WINTER
mode" n.
“- -” will appear on the display the boiler will be
in STAND-BY. The boiler anti freeze function will be enabled.
f
DANGER
The boiler will still be powered.
m
CAUTION
If the outside temperature might fall below ZERO,
since the appliance is equipped with an "antifreeze
function"
– ONLY PUT THE BOILER INTO STAND-BY
– leave the main system switch set to "ON" (boiler
is powered)
– leave the gas cock open.
2.2 Shutting down for long periods
If the boiler is to be left unused for a long period, the following
operations need to be carried out:
– press and hold the button yfor at least 1 second, once if
in "WINTER mode" nto put the boiler into stand-by
“- -”
will appear on the display
– isolate the power supply
– isolate the gas cock
– drain the heating and domestic hot water system if there is
the risk of freezing.
m
CAUTION
Contact the Qualified Technical Personnel if the
procedure described above cannot be easily carried
out.

10
3 MAINTENANCE
3.1 Servicing
As a condition of the warranty and to ensure correct operation
and efficiency, it is important that the boiler is serviced every
12 months, within 30 days of the anniversary of the installation
date ensure the required information is recorded in the Gas
Boiler System Commissioning Checklist (Benchmark).
m
CAUTION
Maintenance interventions must ONLY be carried out
by professionally qualified personnel who will follow
the indications provided in the INSTALLATION AND
MAINTENANCE MANUAL.
3.2 External cleaning
3.2.1 Cleaning the case
When cleaning the cladding, use a cloth dampened with soap
and water or alcohol for stubborn marks.
d
DO NOT
Do not use abrasive products.
4 DISPOSAL
4.1 Disposal of the equipment (European
Directive 2002/96/CE
Once it reaches the end of its operating life, the equipment
MUST BE RECYCLED in line with current legislation.
IT MUST NOT be disposed of together with urban waste.
It can be handed over to recycling centres, if there are any, or
to retailers that offer this service.
Recycling prevents potential damage to the environment and
health. It allows to recover a number of recyclable materials,
with considerable savings in terms of money and energy.

11
DESCRIPTION OF THE APPLIANCE
TABLE OF CONTENTS
5 DESCRIPTION OF THE APPLIANCE 12
5.1 Characteristics ................................12
5.2 Check and safety devices ........................12
5.3 Identification ..................................12
5.3.1 Technical Data Plate................... 13
5.4 Structure .....................................14
5.5 Technical features ..............................15
5.6 Main water circuit ..............................16
5.7 Sensors.......................................16
5.8 Circulation pump ...............................16
5.9 Control panel ..................................17
5.10 Wiring diagram ................................18

12
5 DESCRIPTION OF THE APPLIANCE
5.1 Characteristics
Murelle Pro HE HO ErP are condensing wall mounted boilers
which
Sime has produced for installation into domestic
properties for system heating. The main design choices made
by
Sime for the Murelle Pro HE HO ErP boilers are:
– the total pre-mix microflame burner combined with a steel
heat exchanger
– room sealed, Type C appliance. Suitable for use on sealed
heating systems
Other special features of the
Murelle Pro HE HO ErP boilers are:
– the anti-freeze function which activates automatically if
the temperature of the water inside the boiler falls below
the threshold of the value set at parameter "tS 1.0" and , if
there is an external sensor, if the external temperature falls
below the threshold of the value set at parameter "tS 1.1".
– anti jamming function of the pump. This activates
automatically every 24 hours if no request for heat has been
made
– the chimney sweep function lasts 15 minutes and makes
the job of the qualified technician easier when measuring
the parameters and combustion efficiency
– screen display of the operating and self-diagnostic
parameters with error code display when the fault occurs.
This makes repair interventions easier and allows appliance
operation to be restored correctly.
5.2 Check and safety devices
The Murelle Pro HE HO ErP boilers are equipped with the
following check and safety devices:
– thermal safety thermostat 90±3°C
– delivery sensor (SM)
– return sensor (SR)
– exhaust sensor (SF).
d
DO NOT
Do not commission or operate the appliance with
safety devices which do not work or which have been
tampered with.
a
DANGER
Safety device may only be replaced by professional
qualified personnel using
Sime original spare parts.
5.3 Identification
The Murelle Pro HE HO ErP boilers can be identified by means
of:
1 Packaging label: this is located on the outside of the
packaging and provides a code, the serial number of the
boiler and the bar code
2 Energy Efficiency Label: this is positioned on the outside
of the packaging to notify the User of the level of energy
savings and reduced environmental pollution produced by
the appliance
3 Technical Data Plate: this is located inside the front panel
of the boiler and provides the technical specification,
appliance performance and any other information required
by law.
1
3
4
1 2
4
Code
Model
Serial/N.
GC No
_ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ - _ _ _ - _ _
3
I II
A
B
C
D
E
F
G
2015 811/2013
Cod. 6244745
dB
kW
A++
A+
A
B
C
D
E
F
G
2
Fig. 3
KEY:
1 Packaging label
2 Energy Efficiency Label
3 Technical Data Plate
4 Steaker of product identification

13
5.3.1 Technical Data Plate
REFERENCE DIRECTIVE
CODE
APPLIANCE TYPE
MAX OPERATING TEMPERATURE
MIN USEFUL INPUT (50-30°C)
MAX D.H.W. TEMPERATURE
MIN HEAT INPUT
MIN USEFUL OUTPUT (80-60°C)
APPLIANCE CLASSIFICATION
TYPE OF GAS
SUPPLY PRESSURE
MIN HEAT INPUT
NOx CLASS
GAS COUNCIL NUMBER CODE (UK)
WRAS CERTIFICATION (UK)
ELECTRICAL PROTECTION DEGREE
PIN NO.
YEAR OF MANUFACTURE
SERIAL NUMBER
NAME
MAX USEFUL OUTPUT (50-30°C)
MAX OPERATING PRESSURE
MAX USEFUL OUTPUT (80-60°C)
MAX HEAT INPUT
WATER CONTENT IN BOILER
FLOW RATE
MAX OPERATING PRESSURE
ELECTRICAL SUPPLY
MAXIMUM ABSORBED POWER
MAX HEAT INPUT
COUNTRY OF INTENDED INSTALLTION
APPLIANCE CATEGORY
D.H.W. CONTENT
Fig. 4
m
CAUTION
Tampering with, removing or failing to display the identification plate or carrying out any other operation which does not
allow safe identification of the product or which may hinder installation and maintenance operations.

14
5.4 Structure
21 20 1819
14
13
15
16
17
1
2
3
4
5
8
7
11
12
9
10
6
1 Heat exchanger bleed point
2 Heat exchanger
3 Combustion chamber door
4 Air/gas duct
5 Flame viewing window
6 Ignition/detection electrode
7 Return sensor (SR)
8 Safety thermostat (TS)
9 Delivery sensor (SM)
10 Fan
11 Condensate siphon
12 Control panel
13 Gas valve
14 Air-gas mixer
15 Air inlet pipe
16 Air-smoke chamber
17 System return connection
18 Air inlet
19 Exhaust outlet
20 Exhaust sensor (SF)
21 System flow connection
Fig. 5

15
5.5 Technical features
DESCRIPTION Murelle Pro HE 25 HO ErP
CERTIFICATIONS
Country of intended installation GB
Fuel G20 - G31
PIN number (CE) 1312CP5936
Category II2H3P
Type C13 - C33
Class NOx5 (< 70 mg/kWh)
HEATING PERFORMANCE
(*) HEAT INPUT
Nominal flow [Qn max] kW 24.0
Minimum flow [Qn min] kW 3.0
HEAT OUTPUT
Nominal (80-60°C) [Pn max] kW 23.6
Nominal (50-30°C) [Pn max] kW 25.7
Minimum G20 (80-60°C) [Pn min] kW 2.9
Minimum G20 (50-30°C) [Pn min] kW 3.2
Minimum G31 (80-60°C) [Pn min] kW 2.9
Minimum G31 (50-30°C) [Pn min] kW 3.2
EFFICIENCY
Max useful efficiency (80-60°C) % 98.3
Min useful efficiency (80-60°C) % 96.6
Max useful efficiency (50-30°C) % 107.1
Min useful efficiency (50-30°C) % 106.6
Useful efficiency at 30% of load (40-30°C) % 107.0
Thermal efficiency (EEC 92/42)
Losses after shutdown at 50°C W 46
ENERGY PERFORMANCE
HEATING
Heating seasonal energy efficiency class A
Heating seasonal energy efficiency % 91
Sound power db(A) 59
DOMESTIC HOT WATER
Domestic hot water energy efficiency class -
Domestic hot water energy efficiency % -
Stated domestic hot water profile load -
ELECTRICAL SPECIFICATIONS
Power supply voltage V 230
Frequency Hz 50
Max absorbed electrical power Qn W 34
Min absorbed electrical power at Qn W 11
Absorbed electrical power in stand-by W 3,6
Electrical protection degree IP X5D
COMBUSTION DATA
Smoke temperature at Max/Min flow (80-60°C) °C 82 / 65
Smoke temperature at Max/Min flow (50-30°C) °C 59 / 45
Maximum smoke flow Min/Max g/s 11.1 / 1.38
CO2at Max/Min flow rate (G20) % 9.0 / 9.0
CO2at Max/Min flow rate (G31) % 10.0 /10.0
NOx measured mg/kWh 39
NOZZLES  GAS
Number of nozzles No. 1
Nozzle diameter (G20-G31) mm 5,3
Gas consumption at Max/Min flow rate (G20) m3/h 2.53 / 0.32
Gas consumption at Max/Min flow rate (G31) Kg/h 1.86 / 0.23
Gas supply pressure (G20/G31) mbar 20 / 37
kpa 2 / 3.7
TEMPERATURE  PRESSURE
Max operating temperature [T max] °C 85
Heating adjustment range °C 20÷80

16
Max operating pressure [PMS] bar 2,5
kpa 250
Water content in boiler l 1.80
(*) Heat input calculated using the lower heat output (Hi)
Lower Heat Output (Hi)
G20 Hi. 9.45 kW/m
3
(15°C, 1013 mbar) - G31 Hi. 12.87 kW/kg (15°C, 1013 mbar)
5.6 Main water circuit
4
5
8
7
6
M R
Sc G
3
2
1
Fig. 6
KEY:
M System flow
R System return
G Gas supply
Sc Condensate outlet
1 Condensing heat exchanger
2 Combustion chamber
3 Fan
4 Thermal safety thermostat (TS)
5 Delivery sensor (SM)
6 Return sensor (SR)
7 Condensate siphon outlet
8 Gas valve
5.7 Sensors
The sensors installed have the following characteristics:
– Dual sensor (thermal safety/output) NTC R25°C; 10kΩ
– domestic hot water sensor NTC R25°C; 10kΩ
– external sensor NTC R25°C; 10kΩ
Correspondence of Temperature Detected/Resistance
Examples of reading:
TR=75°C → R=1925Ω
TR=80°C → R=1669Ω.
TR
0°C 1°C 2°C 3°C 4°C 5°C 6°C 7°C 8°C 9°C
Resistance R (Ω)
0°C 27279
17959
12090
8313
5828
4161
3021
2229
1669
1266
973
26135
17245
11634
8016
5630
4026
2928
2164
1622
1232
25044
16563
11199
7731
5440
3897
2839
2101
1577
1199
24004
15912
10781
7458
5258
3773
2753
2040
1534
1168
23014
15289
10382
7196
5082
3653
2669
1982
1491
1137
22069
14694
9999
6944
4913
3538
2589
1925
1451
1108
21168
14126
9633
6702
4751
3426
2512
1870
1411
1079
20309
13582
9281
6470
4595
3319
2437
1817
1373
1051
19489
13062
8945
6247
4444
3216
2365
1766
1336
1024
18706
12565
8622
6033
4300
3116
2296
1717
1300
998
10°C
20°C
30°C
40°C
50°C
60°C
70°C
80°C
90°C
100°C
5.8 Circulation pump
Murelle Pro HE HO ErP boilers do not have a circulation
pump. The pump must be fitted on the system flow pipe, and
electrically controlled by the boiler. When sizing the circulation
pump, the load losses on the water side of the boiler are to be
considered as indicated in the graph.
BOILER LOAD LOSS (mbar)
00 800 1000 1200600400200
50
100
150
200
250
300
350
FLOW (l/h)
Fig. 7

17
5.9 Control panel
1 4
2 2
2 2
2
3
Fig. 8
1 KNOBS
tThe heating knob allows the user to set the flow
temperature to between 20 and 80°C during normal
operation.
2 FUNCTIONAL BUTTONS
sPress for more than one second and release to step
through the operating modes (Stand-by – Summer –
Winter).
<This allows the engineer to scroll through the
parameters or decrease the values.
>This allows the engineer to scroll through the
parameters or increase the values.
oThis allows the engineer to confirm the selected
parameter or to modify the value or to reset the
appliances from a lockout failure.
cProgramming connector cover plug.
NB: pressing any one of these buttons for more than 30
seconds generates a fault on the display without preventing
boiler operation. The warning disappears when the button is
released.
3 DISPLAY
l
“SUMMER” . This function is NOT USED on these boilers.
This symbol appears when the boiler is operating in
Summer mode (used when commissioning the boiler).
If the symbols land nare flashing, this indicates
that the chimney sweep function is active.
n
“WINTER” . This symbol appears when the boiler is
operating in Winter mode. If no operating modes have
been enabled both symbols land nwill be off.
R
“RESET REQUIRED” . This message only appears if there
is a malfunction which must be or may be restored
manually.
r
“DOMESTIC HOT WATER” . This function IS NOT USED on
these boiler models.
t
“HEATING” . This symbol is present during heating
operation or when the chimney sweep function is
operating; it flashes during the heating set point
selection.
f
“LOCKOUT” DUE TO NO FLAME .
F
“FLAME LIT” .
K
“ALARM” . This indicates that a fault has occurred.
The number specifies the cause which generated the
alarm (see section "Fault / malfunction codes".
4 (Not used on these boilers)

18
5.10 Wiring diagram
BLEU
BLACK
BROWN
TRA
EV
F
CN11
PI
BLEU
BROWN
230V - 50Hz
L
N
CN6
CN5
CN17
CN1
CN15
CN14
CN13CN12
CN2
WHITE
WHITE
SR
TA2
CN3
CN4
RED
RED
V
SF
TS
TFU
SM
BLACK
BLACK
BLEU
RED GREEN BLACK BLEU
BLEU
4 3 2 1
BLEU
BLACK
BLACK
BLACK
GREEN
RED
BLEU
BROWN
EAR
BLACK
BLACK
BLACKBLACK
BLEU
BLEU
6
5
1
2 3
6
7
8
3
4
5
2
1
4
4
3
TA 230V OP
L Live
N Neutral
F Fuse (3.15AT)
TRA Ignition transformer
PI System pump connection
V Fan
EAR Ignition / Detection electrode
EV Gas solenoid valve
SM Delivery sensor (SM)
SR Return sensor (SR)
TS Safety thermostat
TFU Thermal fuse
SF Exhaust sensor (SF)
TA-TA2 Room Thermostat
SE External sensor
CR Remote control (instead of room
thermostat)
OP Mechanical timer (accessory)
The heating demand is connected to TA 230V (see page 27).
Fig. 9
m
CAUTION
Installer must:
– Connect the boiler to a 230v -50Hz single phase
power supply through a fused mains switch, with
at least 3mm spacing between contacts, fused at
3amps
– Respect the connections L (Live) - N (Neutral)
– Ensure that the special power cable is only
replaced with a cable ordered as a spare part and
connected by professionally qualified personnel
– Connect the earth wire to an effective earthing
system.
Sime declines all responsible for any
injury or damage to persons, animals,or property
as a result of failure to provide adequate earthing
of the appliance.
d
DO NOT
Do not use water pipes for earthing the appliance.

19
INSTALLATION AND SERVICING INSTRUCTIONS
TABLE OF CONTENTS
6 INSTALLATION 20
6.1 Receiving the product ...........................20
6.2 Dimensions and weight..........................20
6.3 Handling ......................................20
6.4 Ventilation requirements ........................20
6.5 New installation or installation of a replacement
appliance .....................................21
6.6 Cleaning the system ............................21
6.7 Characteristics of feedwater and system treatment ..21
6.8 Boiler installation ..............................21
6.9 Plumbing connections...........................22
6.9.1 Hydraulic configurations ............... 22
6.10 Condensate outlet/collection .....................23
6.11 Gas supply ....................................23
6.12 Connecting the flue .............................24
6.12.1 Flue Terminal Positions ................ 24
6.12.2 Installation of coaxial flues 60/100mm –
80/125mm . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.12.3 Installation of separate ducts 80mm...... 26
6.13 Electrical connections and External controls ........27
6.13.1 Heating demand ...................... 28
6.14 Refilling or emptying............................28
6.15 Method of filling a sealed system..................28
6.15.1 SYSTEM Filling ....................... 28
6.15.2 EMPTYING operations ................. 29
7 COMMISSIONING 30
7.1 Preliminary operations ..........................30
7.2 Before commissioning ..........................30
7.2.1 Self-calibrating procedure .............. 30
7.3 Parameter setting and display ....................31
7.4 List of parameters..............................31
7.5 Fault / malfunction codes ........................32
7.6 Display of operating data and counters.............33
7.7 Checks .......................................33
7.7.1 Chimney sweep function ............... 33
7.8 Gas conversion.................................34
7.9 Heating power output adjustment .................34
8 MAINTENANCE 35
8.1 Servicing......................................35
8.2 External cleaning...............................35
8.2.1 Cleaning the case ..................... 35
8.3 Burner Inspection ..............................35
8.3.1 Burner access........................ 35
8.3.2 Cleaning the burner and the combustion
chamber ............................ 36
8.3.3 Checking the ignition/detection electrode . 36
8.3.4 Final operations ...................... 36
8.4 Checks .......................................36
8.4.1 Checking the flue ..................... 36
8.4.2 Checking the expansion vessel pressure .. 36
8.4.3 System Inhibiter concentration .......... 36
8.5 Circuit Board Replacement ......................37
8.6 Possible faults and solutions .....................37
9 EXPLODED VIEWS 40
10 APPENDIX 1 (GUIDANCE HHIC) 45
11 APPENDIX 2 57

20
6 INSTALLATION
6.1 Receiving the product
Murelle Pro HE HO ErP appliances are delivered in a single unit
protected by cardboard packaging.
Fig. 10
The plastic bag found inside the packaging contains the
following:
– Installation, use and maintenance manual
– Paper template for boiler installation
– Bracket for mounting the boiler on the wall
– Certificate of warranty
– Hydrostatic test certificate
– Hanging Bracket
– Connection pack
d
DO NOT
Do not leave packaging material around or near
children since it could be dangerous. Dispose of it as
prescribed by legislation in force.
6.2 Dimensions and weight
H
WD
Fig. 11
Description Murelle Pro HE 25 HO ErP
W (mm) 400
D (mm) 265
H (mm) 580
Weight (kg) 20.6
6.3 Handling
Once the packaging has been removed, the appliance is to
be handled manually, tilting it slightly, lifting it and applying
pressure in the points indicated in the figure.
Fig. 12
d
DO NOT
Do not hold onto the appliance casing but use the "solid"
parts such as the base and the rear structure
.
a
DANGER
Use suitable tools and personal protection when
removing the packaging and when handling the
appliance.
6.4 Ventilation requirements
Detailed recommendations for the air supply are given in
BS 5440-2. The following note is given for guidance. It is not
necessary to have purpose provided air vents in the room or
compartment that the appliance is installed.
The minimum temperature of the installation room must NOT
be lower than
-5 °C .
m
CAUTION
Observe the required clearances (see Fig. 13).