Sime Murelle Pro 25 LPG User guide

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
6318143C - 10/2015 - R0
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
USER, INSTALLATION AND SERVICING INSTRUCTIONS
Murelle Pro 25 lPG
Condensing wall mounted boiler
Cod.
199838

2
SAFE HANDLING
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.
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.

3

4
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
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?
––
The Benchmark Scheme
Sime is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and com
-
missioning 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.
I
mportant 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
manu
facturer’s instructions must not be taken as overriding any statutory requirements, and failure to comply
wi
th these regulations may lead to prosecution.
N
o modifications to the appliance should be made unless they are fully approved by the manufacturer.
G
AS 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
080
0111999.

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.
– 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 and water valves for the water
heating system.
– 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 25 LPG
(G31) 8112111 47-283-48
COMPLIANCE
Our company declares that Murelle Pro LPG boilers comply
with the following directives:
– Gas Appliances Directive 2009/142/EC
– Boiler Efficiency Directive 92/42/EEC
– Low Voltage Directive 2006/95/EC
– Electromagnetic Compatibility Directive 2004/108/EC
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
VERY IMPORTANT!
PLEASE MAKE SURE YOUR COMMISSIONING CHECKLIST AND THE SERVICE INTERVAL RECORDS ENCLOSED
ARE FILLED IN CORRECTLY.
ALL GAS SAFE REGISTERED INSTALLERS CARRY A GAS SAFE ID CARD.
BOTH SHOULD BE RECORDED IN YOUR COMMISSIONING CHECKLIST AND A SERVICE INTERVAL RECORDS.
YOU CAN CHECK YOUR INSTALLER IS GAS SAFE REGISTERED
BY CALLING ON 0800 408 5500 OR ALTERNATIVELY WWW.GASSAFEREGISTER.CO.UK
1 oPeraTinG The Murelle Pro 25 lPG 8
1.1 Control panel ...................................8
1.2 Preliminary checks ..............................8
1.3 Ignition ........................................9
1.4 Adjusting the delivery temperature .................9
1.5 Adjusting the domestic hot water temperature .......9
1.6 Programming mechanical time clock ...............9
1.7 Fault / malfunction codes ........................10
2 shuTdown 10
2.1 Temporary shutdown............................10
2.2 Shutting down for long periods ...................10
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 25 LPG
1.1 Control panel
1 1
2 2
2 2
2
3
Fig. 1
1 KNOBS
tThe heating knob allows the user to set the heating
temperature to between 20 and 80°C during normal
operation (Default PAR tS1.3 / 1.4).
rThe domestic hot water knob allows the user to set the
domestic hot water temperature to between 10 and
60°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.
NOTE: 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 symbol appears when the boiler is
operating in Summer mode or if only the domestic hot
water mode is enabled via the remote control. 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 or if both the domestic hot
water and heating modes are enabled via the remote
control. With dedicated remote controls CR or Home, 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 symbol is present during
a request for DHW or when the chimney sweep function
is operating; it flashes during the domestic hot water
set point selection.
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".
1.2 Preliminary checks
Prior to use the Murelle Pro LPG 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 and water system valves are
open
– using the pressure gauge (1) 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
– ensure that the filling device is turned off after use.
1
Fig. 2

9
1.3 Ignition
After having carried out the preliminary checks, proceed as
follows:
– set the main system switch to "ON"
– on the display, check that the operating mode on the display
is "SUMMER” land if necessary select it by pressing and
holding the button sfor at least 1 second. The internal
temperature of the boiler will appear on the display
– open one or more than one hot water tap. The rshould
appear on the display and the boiler will ignite and stay
alight until the tap is turned off.
Once the boiler has been operated in "SUMMER mode"l
"WINTER mode" ncan be selected by pressing and holding
the button sfor at least 1 second. The internal temperature
of the boiler will 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. 3
1.5 Adjusting the domestic hot water
temperature
The temperature of the domestic hot water can be adjusted by
turning the rknob on the control panel.
Fig. 4
1.6 Programming mechanical time clock
Setting the time
The time of day can be set by grasping the outer edge of
the grey dial and turning it in a clockwise direction until the
correct time is in line with the white pointer.
Setting the “switching time”
The “ON” periods are set by sliding the grey tappets, adjacent
to the time periods required, to the outer edge of the dial.
The tappets that remain at the centre of the dial will be the
“OFF” periods.
Slide grey tappets
OUT = ON period
Slide grey tappets
IN = OFF period
Heating "OFF"
Heating "ON"
Heating
PROGRAMMIED
I
O
Fig. 5
m
CAUTION
The smallest switching time (ON or OFF) is 15
minutes.
m
CAUTION
During the "ON" period the boiler will operate
according to the mode set (SUMMER or WINTER).

10
1.7 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"
nor twice if in "SUMMER mode" l.
“- -” 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 sfor at least 1 second, once if in
"WINTER mode" nor twice if in "SUMMER mode" lto
put the boiler into stand-by
“- -” will appear on the display
– isolate the power supply
– isolate the gas cock
– close the heating and domestic hot water isolation valves
– drain the heating and domestic hot water system if there is
the risk of freezing.
m
CAUTION
Special attention should be made to installations
in caravans, mobile homes and park homes. The
domestic hot and cold water pipe work should be
cleared of water. Heating systems not filled with a
correct dilution of anti freeze, must be drained.
The "boiler anti freeze function" should not be
considered as suitable alternative for correct
"wintering". Contact suitably qualified personnel for
further advice.
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
5.4 Structure .....................................13
5.5 Technical features ..............................14
5.6 Main water circuit ..............................15
5.7 Sensors.......................................15
5.8 Expansion vessel ...............................15
5.9 Circulation pump ...............................16
5.10 Control panel ..................................16
5.11 Wiring diagram ................................17

12
5 DESCRIPTION OF THE APPLIANCE
5.1 Characteristics
Murelle Pro LPG are last generation low temperature wall
mounted boilers which
Sime has produced for heating and
domestic hot water production. The main design choices
made by
Sime for the Murelle Pro LPG boilers are:
– the atmospheric burner combined with a copper heat
exchanger for heating and a rapid heat exchanger for DHW
– room sealed, Type C appliance. Suitable for use on sealed
heating systems
– the command and control microprocessor electronic board
not only allows a better management of the heating system
and the system for domestic hot water production but it can
also be connected to air thermostats or a remote control
(with an Open Therm protocol), an auxiliary sensor for
the connection of any possible solar kits or to an external
sensor. If this is the case, the boiler temperature varies
on the basis of the external temperature according to the
selected optimal climatic curve allowing for significant
energy and economic savings.
Other special features of the
Murelle Pro LPG 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 and diverter valve. 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 and when checking
gas pressure at the nozzles
– 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 LPG boilers are equipped with the following
check and safety devices:
– thermal safety sensor 100°C
– 3 bar relief valve
– heating water pressure switch
– delivery sensor (SM)
– DHW sensor (SS).
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 LPG 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 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
2
3
1
2
3
Code
Model
Serial/N.
GC No
_ _ _ _ _ _
_ _ _ _ _ _ _ _ _ _ _ _ _
_ _ _ _ _ _ _ _
_ _ - _ _ _ - _ _
Fig. 6
KEY:
1 Packaging label
2 Technical Data Plate
3 Steaker of product identification
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.

13
5.4 Structure
18
19
15
16
17
1
2
3
6
5
7
8 9
10 12
15
14
13
11
4
1 Fan
2 Dual sensor (thermal safety/delivery)
3 Combustion chamber
4 Ignition/detection electrode
5 Diverter valve
6 Domestic hot water sensor (SS)
7 Control panel
8 Secondary heat exchanger
9 Gas valve
10 Domestic water filter and flow regulator
11 System relief valve
12 Boiler drain
13 Pump
14 Water pressure switch
15 Automatic bleed valve
16 Burner
17 Primary heat exchanger
18 Expansion vessel
19 Exhaust outlet
Fig. 7

14
5.5 Technical features
DESCRIPTION Murelle Pro 25 LPG
CERTIFICATIONS
Country of intended installation GB
Fuel G31
PIN number 1312CP5935
Category I3P
Type C12 - C32
Class NOx3 (< 150 mg/kWh)
HEATING PERFORMANCE
HEAT INPUT
Nominal kW 25.5
Minimum kW 9.2
HEAT OUTPUT
Nominal (80-60°C) kW 23.7
Min useful efficiency (80-60°C) kW 7.8
EFFICIENCY
Max useful efficiency (80-60°C) % 93.0
Min useful efficiency (80-60°C) % 84.8
Useful efficiency at 30% of load (50-30°C) % 90.5
Thermal efficiency (EEC 92/42)
Losses after shutdown at 50°C W 71
DOMESTIC HOT WATER PERFORMANCE
Nominal heat input kW 25.5
Minimum heat input kW 9.2
D.H.W. flow rate ∆t 30°C l/min 11.3
Continuous D.H.W. flow rate (∆t 25°C / ∆t 35°C) l/min 13.6 / 9.7
Minimum D.H.W. flow rate l/min 2.2
Max / Min Pressure bar 7 / 0.4
kpa 700 / 40
ELECTRICAL SPECIFICATIONS
Power supply voltage V 230
Frequency Hz 50
Absorbed electrical power W 112
Electrical protection degree IP X5D
COMBUSTION DATA
Smoke temperature at Max/Min flow (80-60°C) °C 142.5 / 96.4
Smoke flow Max/Min g/s 17 / 16
CO2at Max/Min flow rate with separate chimneys % 7.7 /2.6
NOZZLES  GAS
Number of nozzles No. 11
Nozzle diameter mm 0,80
Gas consumption at Max/Min flow rate Kg/h 1.98 / 0.71
Gas supply pressure (G20/G31) mbar 20 / 37
kpa 2 / 3.7
TEMPERATURE  PRESSURE
Max operating temperature °C 85
Heating adjustment range °C 20 ÷ 80
Domestic hot water adjustment range °C 10 - 60
Max operating pressure bar 3
kpa 300
Water content in boiler l 3.05
Lower Heat Output (Hi)
G31 Hi. 12.87 kW/kg (15°C, 1013 mbar)

15
5.6 Main water circuit
1
4
5
3
6
8
15
109
14
17
16
12
11 13 S
7
M U G E R
2
Fig. 8
KEY:
M System flow
R System return
U Domestic hot water outlet
E Domesti hot water inlet
S Safety valve outlet
G Gas supply
1 Fan
2 Heat exchanger (mono-thermal)
3 Dual sensor (thermal safety/delivery)
4 Combustion chamber
5 Gas valve
6 Domestic hot water heat exchanger
7 Domestic hot water sensor (SS)
8 Diverter valve
9 Automatic bleed valve
10 Pump
11 Domestic hot water flow meter
12 Domestic hot water filter
13 System relief valve
14 Water pressure switch
15 Boiler drain
16 System expansion vessel
17 Water pressure gauge
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 Expansion vessel
The expansion vessel installed on the boilers has the following
characteristics:
Description U/M
Murelle Pro LPG
25
Total capacity l 8,0
Prefilling pressure kPa 100
bar 1,0
Useful capacity l 4,0
Maximum system content (*) l 109
(*) Conditions of:
Average maximum temperature of the system 85°C
Start temperature at system filling 10°C.
m
CAUTION
– For systems with water content exceeding the
maximum system content (as indicated in the
table) an additional expansion vessel must be
fitted.
– The difference in height between the relief valve
and the highest point of the system cannot exceed
6 metres. If the difference is greater than 6 metres,
increase the prefilling pressure of the expansion
vessel and the system when cold by 0.1 bar for
each meter increase.

16
5.9 Circulation pump
The flow-head performance curve available for the heating
system is shown in the graph below.
RESIDUAL HEAD (mbar)
00 800 1000 1200 1400 1600600400200
100
200
300
400
500
600
FLOW (l/h)
Fig. 9
5.10 Control panel
1 1
2 2
2 2
2
3
Fig. 10
1 KNOBS
tThe heating knob allows the user to set the heating
temperature to between 20 and 80°C during normal
operation (Default PAR tS1.3 / 1.4).
rThe domestic hot water knob allows the user to set the
domestic hot water temperature to between 10 and
60°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.
NOTE: 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 symbol appears when the boiler is
operating in Summer mode or if only the domestic hot
water mode is enabled via the remote control. 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 or if both the domestic hot
water and heating modes are enabled via the remote
control. With dedicated remote controls CR or Home, 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 symbol is present during
a request for DHW or when the chimney sweep function
is operating; it flashes during the domestic hot water
set point selection.
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".

17
5.11 Wiring diagram
BROWN
BLUE
BLUE BLUE
RED
RED
RED RED
RED
GREEN
WHITE
RED RED
BLUE
CD .6324910
BROWN
BLACK
BLUE
BLACK
230 V - 50 Hz
L
N
BLACK
BROWN
VD
SS
SM1 SM2
TRA
EAR
EV
F
PI
V
PA FLM
CN6
CN5
CN3
CN17
CN4 CN1
CN15
CN14
CN13CN12
CN11
2
3
VCC GND IN
CN2
BLACK
BLACK
BLUE BLUE
3456
SE
TA
CR
BLUE BROWN
1
2 3
4
OP
L Live
N Neutral
F Fuse (3.15AT)
TRA Ignition transformer
PI Pump
V Fan
EAR Ignition / Detection electrode
EV Gas solenoid valve
SS Domestic hot water sensor (SS)
SM1-2 Dual sensor (thermal safety/delivery)
FLM Flow meter
VD Diverter valve
PA Water pressure switch
TA Room Thermostat
SE External sensor
CR Remote control (instead of room thermostat)
OP Mechanical timer
Note: Volt free external controls (TA) are connected to terminals 5 and 6 after removal of the
link. Fig. 11
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.

18
The Benchmark Scheme
Benchmark places responsibilities on both manufacturers and installers.
The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is installed, commis-
sioned and serviced in accordance with the manufacturer’s instructions by competent persons and that it meets the require-
ments of the appropriate Building Regulations.
The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the
customer for future reference.
Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of
Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme.

19
INSTALLATION AND SERVICING INSTRUCTIONS
Installer Checklist
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?
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
6.10 Gas supply ....................................22
6.11 Connecting the flue .............................23
6.11.1 Flue Terminal Positions ................ 23
6.11.2 Installation of coaxial flues 60/100mm –
80/125mm . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.12 Electrical connections and External controls ........25
6.12.1 External sensor....................... 26
6.12.2 External timers and Room Thermostats... 26
6.12.3 EXAMPLE of use of the command/control
device on some types of heating systems.. 26
6.13 Refilling or emptying............................27
6.14 Method of filling a sealed system..................27
6.14.1 SYSTEM Filling ....................... 27
6.14.2 EMPTYING operations ................. 28
7 coMMissioninG 29
7.1 Preliminary operations ..........................29
7.2 Before commissioning ..........................29
7.3 Parameter setting and display ....................29
7.4 List of parameters..............................30
7.5 Fault / malfunction codes ........................31
7.6 Display of operating data and counters.............31
7.7 Checks and adjustments ........................32
7.7.1 Chimney sweep function ............... 32
7.7.2 Adjusting gas pressure at the nozzles..... 33
7.8 Heating power output adjustment .................33
7.9 Automatic calibration procedure ..................34
8 MainTenance 36
8.1 Servicing......................................36
8.2 External cleaning...............................36
8.2.1 Cleaning the case ..................... 36
8.3 Burner Inspection ..............................36
8.3.1 Cleaning the heat exchanger ............ 36
8.3.2 Cleaning the burner ................... 37
8.3.3 Checking the ignition/detection electrode . 37
8.3.4 Final operations ...................... 37
8.4 Checks .......................................37
8.4.1 Checking the flue ..................... 37
8.4.2 Checking the expansion vessel pressure .. 37
8.4.3 System Inhibitor concentration .......... 37
8.5 Burner pressure test............................37
8.6 Circuit Board Replacement ......................38
8.7 Possible faults and solutions .....................38
9 exPloded views 41

20
6 INSTALLATION
6.1 Receiving the product
Murelle Pro LPG appliances are delivered in a single unit
protected by cardboard packaging.
Fig. 12
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. 13
Description
Murelle Pro LPG
25
W (mm) 400
D (mm) 250
H (mm) 700
Weight (kg) 29
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. 14
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. 15).