Sime MURELLE HE 50 R E Quick guide

MURELLE HE 50 R I - 50 R E
INSTALLATION AND SERVICE INSTRUCTIONS
Fonderie SIME S.p.A Cod. 6322971A - 04/2018
EN
CAUTION
This product must be installed exclusively by professionally qualified personnel in accordan-
ce with the requirements of the standards AS/NZS 5601, AS/NZS 3500, AS/NZS 3000 (current
version) of the local gas, electricity authorities and other relevant legislation.
Condensing wall mounted boiler
Gas Safety Certificate AS/NZS 5263.1.2 LN: SAI-400271

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.
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 pre-
cautions 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 cir-
cuit.
– Protect any surfaces, carpets or floorings.
– Use a suitable container to catch any water that escape when removing the protective caps from the connections.
THE APPLIANCE IS NOT TO BE USED BY PERSONS (INCLUDING CHILDREN) WITH REDUCED PHYSICAL, SENSORY
OR MENTAL CAPABILITIES, OR LACK OF EXPERIENCE AND KNOWLEDGE, UNLESS THEY HAVE BEEN GIVEN
SUPERVISION OR INSTRUCTION.
CHILDREN BEING SUPERVISED NOT TO PLAY WITH THE APPLIANCE.
SAFE HANDLING
COMPLIANCE
Our company declares that Murelle HE 50 R I-E boilers comply with the following Australian Standards:
– AS/NZS 5601 Gas Installations
– AS/NZS 3500 Water services,Sanitary plumbing and drainage
– AS/NZS 3000 Electrical installations, Buildings, structures and premises.
Licence Number: SAI-400271

3
WARNINGS
– In case of fault and/or incorrect equipment operation, deactivate it, without making any repairs or taking any direct action. Apply
only to qualified technical personnel.
– Boiler installation and any other assistance and/or maintenance activity must be carried out by qualified registered as a licenced
gas technician. Under no circumstances, the devices sealed by the manufacturer can be tampered with.
– It is absolutely prohibited to block the intake grilles and the aeration opening of the room where the equipment is installed.
– The manufacturer shall not be held liable for any damage caused by improper use of the appliance.
– This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack
of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person
responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.
1 LIGHTING AND OPERATION
BOILER IGNITION (fig. 1)
The first ignition of the boiler must be carri-
ed out by qualified technical personnel.
Successively, if it is necessary to start up the
boiler again, adhere strictly to the following
instructions: open the gas tap to allow the
flow of the fuel and move the main switch of
the system to “ON”. When fuel is fed to the
boiler, a sequence of checks will be carried
out and the display shows the normal condi-
tion of the functioning, always indicating the
pressure of the system. If the blue luminous
bar is on, this indicates the presence of vol-
tage.Press the key
5
3
1
2
4
of the controls (pos.
2) to activate the functioning. The display
will be as shown in the figure.
N.B.: The first press of any key of the
controls (2), acts only to illuminate the
display.
REGULATION OF THE WATER
TEMPERATURE FOR HEATING (fig. 2)
To set the temperature of the water for he-
ating, press the key of the controls (2).
The first time the key is pressed, the SET of
heating circuit 1 is selected. The second
time it is pressed, the SET of heating circu-
it 2 is selected. The display will be as shown
in the figure. Change the values with the
key
5
3
1
2
4
and
5
3
1
2
4
.
Standard display will return by pressing the
key again, or after 10 seconds if no key
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 1
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 2
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Heating circuit 2
Heating Circuit 3,
when fitted.
USER INSTRUCTIONS
CONTENTS
1 LIGHTING AND OPERATION..................................................................................................................................3
2 HANDOVER INSTRUCTIONS .................................................................................................................................5
3 SERVICE RECORDS...............................................................................................................................................6

4
is pressed.
Regulation of the external sensor
(fig. 2/a)
If an external sensor is installed, the value
of the output temperature is automatically
chosen by the system, which quickly adjusts
the environmental temperature on the ba-
sis of the external temperature. If you wish
to change the value of the temperature, in-
creasing or decreasing that calculated au-
tomatically by the electronic card, proceed
as indicated in the preceding paragraph.
The level of various correction of a value of
temperature proportional calculated. The
display will be as shown in fig. 2/a.
TO SWITCH OFF THE BOILER (fig. 1)
In the case of a short absence, press the
key (
5
3
1
2
4
) of the controls (pos. 2). The di-
splay will be as shown in the fig. 1. In this
way, leaving the electricity and the fuel
supply connected, the boiler is protected
from frost and from the pump becoming
jammed. If the boiler is not used for a pro-
longed period, it is advisable to disconnect
the electricity supply, by switching off the
main switch of the system, and to close the
gas isolation valve and, if low temperatures
are expected, to completely empty the
hydraulic circuits to avoid pipes being da-
maged by frost.
ERRORS AND SOLUTIONS
When there is a functioning error, the di-
splay shows an alarm and the blue lumi-
nous bar becomes red. Descriptions of the
errors with the relative alarms and solu-
tions are given below:
– ALARM 02 (fig. 3/a)
If the water pressure detected is lower
than 0.5 bar, the boiler will stop and the
display will show “ALL 02”.
Using the external filling device, repres-
surise until the pressure indicated by the
display is between 1 and 1.5 bar (98 and
147 kPa).
If it is necessary to repeat the system
refilling procedure, it is advisable to
contact qualified technical personnel to
check the seal of the heating system (to
check whether there are any leaks).
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 3/a
– ALL 03
Request assistance from qualified tech-
nical personnel.
– ALL 05
Request assistance from qualified tech-
nical personnel.
– ALL 06 (fig. 3/c)
Press the key
5
3
1
2
4
of the controls (2) to
re-start the boiler.
If the error persists, request assistance
from qualified technical personnel.
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 3/c
– ALL 07 (fig. 3/d)
Press the key
5
3
1
2
4
of the controls (2) to
re-start the boiler.
If the error persists, request assistance
from qualified technical personnel.
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 3/d
– From “ALL 08” to “ALL 10”
Request assistance from qualified tech-
nical personnel.
– ALL 13 (fig. 3/e)
Press the key
5
3
1
2
4
of the controls (2) to
re-start the boiler.
If the error persists, request assistance
from qualified technical personnel.
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Apre
2
2
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)
Fig. 3/e
– ALL 14 and ALL 15
Request assistance from qualified tech-
nical personnel.
– “
5
3
1
2
4
FLASHING”
Request assistance from qualified tech-
nical personnel.
– From “ALL 20” to “ALL 35”
Request assistance from qualified tech-
nical personnel.
– ALL 70 and ALL 71
These alarms appear on the SIME HOME
remote control display. Request assi-
stance from qualified technical person-
nel.
GAS CONVERSION
If it is necessary to change to a different
type of gas, request assistance only from
authorised technical personnel.
MAINTENANCE
Annual maintenance of the appliance
should be planned sufficiently in advance,
and can only be done by registered , licen-
ced technical personnel.
Fig. 2/a
Apre
22
2
Circuito
riscaldamento 2
Circuito
riscaldamento 3
(impianto tre
zone)

5
Handover Instructions
No. Description ✔
when
done
1 Fill in all the details on this Boiler manual
2 Instruct the owner/users on the correct operation of this heating system, this includes
how to turn the system on and off, adjust the time and temperature settings.
3 How to turn the heating system off in summer and on for winter.
4 Where all the major items are, their functions and how to check and turn them on or
off. Simple fault resolution i.e. power on.
5 How to check and remove air in the radiators. Give them a bleed key.
6 The importance of this SERVICE RECORDS, keeping safe & accessible when required
7 Recommend that the boiler should be serviced at/before the start of winter next year
then every two years.
2 HANDOVER INSTRUCTIONS

6
Service – 1 – year 1 Date
Service technician Name PIC Licence No.
Service Company
Contact phone number
Work Completed
Note
Service – 2 – year 3 Date
Service technician Name PIC Licence No.
Service Company
Contact phone number
Work Completed
Note
Service – 3 – year 5 Date
Service technician Name PIC Licence No.
Service Company
Contact phone number
Work Completed
Note
Service – 4 – year 7 Date
Service technician Name PIC Licence No.
Service Company
Contact phone number
Work Completed
Note
3 SERVICE RECORDS

7
Service – 5 – year 9 Date
Service technician Name PIC Licence No.
Service Company
Contact phone number
Work Completed
Note
Service – 6 – year 11 Date
Service technician Name PIC Licence No.
Service Company
Contact phone number
Work Completed
Note
Service – 7 – year 13 Date
Service technician Name PIC Licence No.
Service Company
Contact phone number
Work Completed
Note

DESCRIPTION OF THE APPLIANCE
CONTENTS
1.1 CHARACTERISTICS ..................................................................................................................... ...................... 9
1.2 DIMENSIONS
1.3 TECHNICAL FEATURES .............................................................................................................. ...................... 11
1.4 FUNCTIONAL DIAGRAM .............................................................................................................. ...................... 12
1.5 MAIN COMPONENTS .................................................................................................................. ...................... 13
1.6 APPROXIMATE MINIMUM DISTANCES
1.7 BOILER ELECTRICAL .................................................................................................................. ...................... 14
DO NOT SPRAY AEROSOLS IN THE VICINITY OF THIS APPLIANCE WHILE IT IS
IN OPERATION
.
DO NOT USE OR STORE FLAMMABLE MATERIALS IN OR NEAR THIS APPLIANCE.
DO NOT PLACE ARTICLES ON OR AGAINST THIS APPLIACE.
DO NOT MODIFY THIS APPLIANCE.
THE APPLIANCE IS NOT SUITABLE FOR POOL OR SPA HEATING.

9
1.1 CHARACTERISTICS
MURELLE HE 50 R I/E are premixed gas
condensation for heating only with wide
range of power modulation (from 20% to
100% of power) designed for single in-
stallation and in modular systems with
several generators connected in sequen-
ce/cascade and independent from each
other.
For optimum installation and operation,
always follow the instructions provided in
this manual.
1.2 DIMENSIONS
M
G
S3 R3
RC
38
208
60 35
145
82
440
450
120 161
CA
CS
385
==
250
141
124
171
269
15721
700
201
Fig. 1
FIXTURES
R Heating return G 1” (UNI - ISO 228/1)
M Heating flow G 1” (UNI - ISO 228/1)
G Gas connection G 3/4” (UNI - ISO 228/1)
R3 D.H.W. tank return G 1” (UNI - ISO 228/1)
C Filling system G 1/2” (UNI - ISO 228/1)
S1 Safety valve discharge
S3 Condensation outlet ø 25
CA Air inlet ø 80
CS Exhaust ø 80
MURELLE HE 50 R I
S1

10
194
928
500 445
285
Ø80/
125
106
385 ==
723
247
396
120 50
247
232
437
137
266
167
121
G
S3
S1
R3
R
M
C
FIXTURES
R Heating return G 1” (UNI - ISO 228/1)
M Heating flow G 1” (UNI - ISO 228/1)
G Gas connection G 3/4” (UNI - ISO 228/1)
R3 D.H.W. tank return G 1” (UNI - ISO 228/1)
S3 Condensation outlet ø 25
S1 Safety valve discharge
C System loading G 1/2” (UNI - ISO 228/1)
MURELLE HE 50 R E
Fig. 1/a

11
1.3 TECHNICAL FEATURES
MURELLE HE 50 R I / E
Heat output
Nominal (80-60°C) kW 46.8
Nominal (50-30°C) kW 51.2
Reduced (80-60°C) kW 9.3
Reduced (50-30°C) kW 10.5
Heat input nominal * kW - MJ/h 53.3 - 192.0
Heat input reduced * kW - MJ/h 10.6 - 38.2
Max useful yield (80-60°C) ** % 87.7
Max useful yield (50-30°C) ** % 96.0
Losses after shutdown to 50°C W 76
Max/Min inlet water pressure kPa 400 / 50
Electrical supply voltage V - Hz 230 - 50
Adsorbed power consumption with fixed W 180
Electrical protection grade IP X4D
C.H. setting range °C 20/80
Water content boiler l 2.3
Maximum water head kPa 350
Maximum temperature °C 85
Expansion vessel (
kit optional code 8101541 ) ***
Capacity/Pressure l/kPa 8/147
D.H.W. setting range °C --
D.H.W. flow rate l/min --
Continuous D.H.W. flow rate ∆T 30°C l/min --
Minimum D.H.W. flow rate l/min --
D.H.W. pressure min/max kPa --
D.H.W. pressure min. nom. power kPa --
Exhaust fumes temperature at max flow rate (80-60°C) °C 85
Exhaust fumes temperature at min. flow rate (80-60°C) °C 70
Exhaust fumes temperature at max flow rate (50-30°C) °C 52
Exhaust fumes temperature at min. flow rate (50-30°C) °C 45
Smokes flow min/max kg/h 15/79
CO2 at flow rate Natural Gas % 9.0
CO2 at flow rate UNIVERSAL LPG % 10.0
Licence No. SAI 400271
Category II2H3P
Type B23-B53-B23P-B53P-C13-C33-C43-C53-C83
NOx emission class 5 (< 70 mg/kWh)
Weight when empty (I/E) kg 45/52
Main burner nozzle
Quantity nozzles n° 1
Natural Gas nozzle diameter ø 8.0
UNIVERSAL LPG nozzle diameter ø 5.5
Consumption at maximum/minimum flow rate
Maximum Natural Gas m3/h 5.15
Minimum Natural Gas m3/h 1.01
Maximum UNIVERSAL LPG kg/h 3.73
Minimum UNIVERSAL LPG kg/h 0.75
Gas supply pressure
Natural Gas (min/max) kPa 1.13 / 5.00
UNIVERSAL LPG (min/max) kPa 2.75 / 7.00
* They are obtained by gross calorific Value = 37.78 MJ/m3 *** For boilers in cascade dimension the expansion vessel
** They are obtained by net calorific Value = 34.02 MJ/m3

12
8
4
7
5
6
10
11
2
13
14
17
12
1
CR3
G
S3
MR
18
19
20
1.4 FUNCTIONAL DIAGRAM
Fig. 2
KEY
1 Gas valve
2 Condensate drain tap
4 Fan
5 Heating flow sensor (SM)
6 Safety thermostat 95°C
7 Exhaust sensor (SF)
8 Primary heat exchanger
10 Heating return sensor (SR)
11 Water pressure transducer
12 Auto air vent
13 Pump
14 Drain vent
17 Safety valve 3.5 bar (343 kPa)
18 Colector signal
19 Pressure probe
20 Connecting pipe
CONNECTIONS
R Heating return
M Heating flow
G Gas connection
S3 Condensation outlet
C Optional filling point
R3 D.H.W. tank return

13
1
2
3
4
5
6
78
9
10
11
12
14
13
Fig. 3
1.5 MAIN COMPONENTS (fig. 3)
KEY
1 Control panel
2 Safety thermostat
3 Heating flow sensor (SM)
4 Ignition transformer
5 Ignition electrode
6 Primary heat exchanger
7 Air release vent
8 Exhaust sensor (SF)
9 Ionisation electrode
10 Gas mixer
11 Fan
12 Pump
13 Collector signal
14 Pressure probe
≥ 50 mm ≥ 300 mm
≥ 900 mm
1.6 APPROXIMATE MINIMUM DISTANCES
CAUTION
These minimum clearances must
be maintained also in considera-
tion of outdoor installations in con-
fined spaces (e.g. alcoves).
Fig. 3/a

14
1.7 BOILER ELECTRICAL (fig. 3/b)
OP
(24 VAC)
TA2 (24 VRAC)
TA1 (24 VRAC)
SE (5 VDC)
TS (24 VDC)
SB/SA
(5 VDC)
SM (5 VDC)
SF (5 VDC)
SR (5 VDC)
RS-485
(24 VAC)
cd. 6301480
CONNECTOR SPARE PART CODES:
CN1 code 6319162
CN2 code 6319160
CN3 code 6319164
CN4 code 6316203
CN6 code 6316202
CN7 code 6316204
CN10 code 6319165
CN12 code 6299991
CN13 code 6319161
CN14 code 6319163
KEY
F1-2 Fuse (4 AT)
TRA Ignition transformer
PI Boiler pump
V Fan
EA Ignition electrode
ER Ionisation electrode
EV1-2 Gas valve coil
TS Safety thermostat
SF Exhaust temperature sensor
TFU Thermal fuse
SM Heating flow sensor
SR Heating return sensor
TPA Pressure transducer
JP1 Selection TA2 or 0-10 VDC
(See note below)
TA1 Zone 1 environment thermostat
TA2 Zone 2 environment thermostat
SB D.H.W. sensor L. 2000 (optional)
CR Remote control
SIME HOME (optional)
SE External sensor (optional)
OP Programming clock (optional)
AR Remote alarm
VZ Zone valve
AUX Auxiliary connection
RS-485 CASCADE/MODBUS board
SA Frost detector (external version only)
NOTE: Connect TA1 to the clamps 7-8 after
having removed the bridge.
NOTE - JP1 link
With JP1 link fitted TA2 input is by operation of a clean contact.
For operation by a BMS (0-10v dc) signal, JP1 must be removed, TA1 link fitted and the BMS con-
nected, +ve to terminal 10 - CN6, -ve to terminal 4 - CN4.
PAR 14 will require setting to the maximum flow temperature required.” Fig. 3/b

15
IMPORTANT
When carrying out commissioning of the boiler, you are highly recommended to perform the following checks:
–
Make sure that there are no liquids or inflammable materials in the immediate vicinity of the boiler.
– Make sure that the electrical connections have been made correctly and that the earth wire is connected to a good
earthing system.
– Open the gas tap and check the soundness of the connections, including that of the burner.
– Make sure that the boiler is set for operation for the type of gas supplied.
– Check that the flue pipe for the outlet of the products of the combustion is unobstructed and has been properly
installed.
– Make sure that any shutoff valves are open.
– Make sure that the system is charged with water and is thoroughly vented.
– Check that the circulating pump is not locked.
– Purge the system, bleeding off the air present in the gas pipe by operating the pressure relief valve on the gas
valve inlet.
–
The installer must provide the user with instruction in operation of the boiler and safety devices and hand over the
instruction booklet to the user.
INSTALLER INSTRUCTIONS
CONTENTS
1 INSTALLATION............................................................................................................................ ...................... 16
2 CHARACTERISTICS ..................................................................................................................... .......................28
3 COMMISSIONING, USE AND MAINTENANCE ............................................................................... .......................36
4 COMMISSIONING CHECKLIST ..................................................................................................... .......................44
5 EXPLODED VIEWS ...................................................................................................................... .......................45
6 REPLACEMENT OF PARTS .......................................................................................................... .......................52
7 BOILER REGISTRATION ............................................................................................................... .......................54

16
The boiler must be installed in a fixed
location and only by specialized and
qualified firms in compliance with all
instructions contained in this manual.
Furthermore, the installation must be in
accordance with current standards and
regulations.
1.1 BOILER ROOM
The boilers MURELLE HE 50 R I/E can be
installed in boiler rooms whose size and
requirements meet current regulations.
Furthermore, vents, with surface areas
at least 3.000 sq. cm or 5.000 sq. cm
for gas with density over 0.8, must be
installed in the outer walls for room
ventilation.
1.2 INSTALLATION
1.2.1 Single boiler (fig. 4)
For single boiler installations a kit is
available upon request: cod. 8101541.
1.2.2 Sequence/cascade boilers
(fig. 4 - fig. 4/a)
For sequence/cascade installations
using polypropylene smoke collectors
with a clapet valve, every single boiler
that makes up the heating system must
have the following installation parame-
ters modified:
- PAR 1 = 6 (for NATURAL GAS boilers)
- PAR 1 = 14 (for UNIVERSAL LPG boilers)
Refer to section 3.3 to access the
1 INSTALLATION
Fig. 4
Single installation
with kit optional code 8101541
WARNING:
- The use of a hydraulic separator is mandatory.
- When replacing boilers in existing insalla-
tions, it is advisable to install a heat exchanger
to separate the boiler circuit from the secon-
dary circuits. See the pressure curve for the
boiler supply shown in figure 14.
SOLUZIONE PER EXPORT SOLUZIONE ITALIA
207,5
450
R3
170,5
268
M2
700
595
RM
330 65
440,5
268
M2
313
M2
313
268
RM
330 65
700
595
M2
440,5 450
R3
170,5
268
207,5
M Heating flow
R 2” (UNI-ISO 7/1)
R Heating return
R 2” (UNI-ISO 7/1)
M2 D.H.W. tank flow
G 1” (UNI-ISO 228/1)
R3 D.H.W. tank return
G 1” (UNI-ISO 228/1)
M
R
S3
G
Installation in sequence/cascade
R Heating return
M Heating flow
G Gas connection
S3 Condensation outlet

17
INSTALLER PARAMETERS section.
The boiler is provided with the board
RS-485 that permits to manage up to 8
boilers in cascade and communication
in MODBUS.
The board is placed on the back of the
control panel. Access the board and
chose the desired operating mode
(CASCADE or MODBUS) by selecting the
DIP SWITCH of the board as indicated in
figure 4/a.
CASCADE mode (fig. 4/b)
Electrically connect all the boilers that
form the modular cascade thermal
system and set installer parameters PAR
15 on every single boiler as indicated in
fig. 4/b.
CASCADE WITH MORE
THAN TWO BOILERS
When more than two boilers are connected
in cascade, it is essential that the OEM
parameter on the “Master” boiler is reset
to coincide with the number of boilers in
the cascade.
This must be done after setting PAR 15 on
the designated Master boiler to “0”
On the “Master” boiler press any key to
wake up the display.
Then press simultaneously the and
the buttons for 5 seconds until the
display is as shown.
Then press again, simultaneously, the
and the buttons for 2 seconds until
the display shows.
Next press, in the order shown
The display will be as shown.
Press the button, and the display
will show.
Use the and buttons to set the
number of boilers in the cascade.
Then press to confirm the settings.
DIP SWITCH
GESTIONE IN CASCATA
12 3
CASCADE MANAGEMENT
DIP SWITCH
GESTIONE IN MODBUS
MODBUS MANAGEMENT
123
ON
123
ON
x 2
CN10
CHIAVE
POLARIZATION
Fig. 4/a

18
DIP SWITCH
DIP SWITCH
DIP SWITCH
123
123456
123456
123456
X5 X5
WIRED
CONNECTOR CN10
(code 6319165)
RS-485 BOARD
RS-485 BOARD
RS-485 BOARD
WIRED
CONNECTOR CN10
(code 6319165)
WIRED
CONNECTOR CN10
(code 6319165)
BOILER BOARD (SLAVE ...)
BOILER BOARD (SLAVE 1)BOILER BOARD (MASTER)
ON
123
ON
123
ON
EXTERNAL SENSOR (SE)
CASCADE SUPPLY PROBE (SMC)
CHARACTERISTICS
OF ELECTRIC CABLE:
-
3 wires of 24 AWG
- Screened and twisted - Characteristic impedance 100 Ω - Shield connected to ground with only one side of the line
–
+
GND
–
+
GND
–
+
GND
–
+
GND
–
+
GND
–
+
GND
INSTALLER PARAMETERS SETTING: PAR 15 CASCADE ADDRESS -- = Disabled 0 = Master 1...7 = Slave (N.B. Ensure that each slave is numbered separately!) ATTENTION: - CONNECT UP TO A MAXIMUM OF 8 RS-485 BOARDS. - THE EXTERNAL SENSOR MUST BE CONNECTED TO THE MASTER BOILER (SE). - CONNECT CASCADE DELIVERY SENSOR (SMC) TO THE SLAVE 1 BOILER. - SE, SMC sensor and the RS-485 boards wired connector are provided in a kit at the request code 8092250. - NOTE: RS485 LED, THIS WILL BE ILLUMINATED GREEN ON THE ASSIGNED MASTER BOILER, AND ORANGE ON SLAVE BOILERS. - THE RED LED WILL FLASH WHEN THE DIP SWITCH IS SET INCORRECTLY.
Fig. 4/b

19
MODBUS mode (fig. 4/c)
The RS-485 board can be used for
MODBUS communication of every
MURELLE HE 50 R I / E boiler. In this
case, proceed as follows:
- Set the DIP SWITCH of the RS-485 board
and the PAR 16 as indicated in the figure.
- Choose the communication configu-
ration suited to the MODBUS network
(PAR 17 INST) according to Table PAR
17 INST.
SCHEDA CALDAIA
DIP SWITCH
SCHEDINO RS-485
123
CO
NNETT
O
R
E
C
ABLAT
O
C
N1
0
(
cod. 6319165
)
123456
WIRED CONNECTOR
CN10
(code 6319165)
COMUNICAZIONE MODBUS
MODBUS COMMUNICATION
RS-485 BOARD
/ BOILER BOARD
ON
–
+
GND
–
+
GND
INSTALLER PARAMETERS SETTING:
PAR 16 MODBUS MODE
-- = Disabled
1...31 = Slave from 1 to 31
(ATTENTION: Each slave must be
assigned with a different num-
ber).
PAR 17 MODBUS CONFIGURATION
-- = Disabled
1...30 = Factory value 25
(See Tab. PAR 17 INST)
ATENTION: Switch off and restart the boiler
after setting PAR 17!
11200 8No 1
21200 8No 2
31200 8Pari /1
41200 82
51200 8Dispari / 1
61200 82
72400 8No 1
82400 8No 2
92400 81
10 2400 82
11 2400 81
12 2400 82
13 4800 8No 1
14 4800 8No 2
15 4800 81
16 4800 82
17 4800 81
18 4800 82
19 9600 8No 1
20 9600 8No 2
21 9600 81
22 9600 82
23 9600 81
24 9600 82
25 19200 8No 1
26 19200 8No 2
27 19200 81
28 19200 82
29 19200 81
30 19200 82
PAR 17 INST Baud Rate N° Bit Dati Parità Bit di Stop
Par 17 INST Baud Rate No. Data Bit Parity Stop Bit
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Pari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Dispari /
Even
Even
Even
Even
Even
Even
Even
Even
Even
Even
Odd
Odd
Odd
Odd
Odd
Odd
Odd
Odd
Odd
Odd
TABELLA PAR 17 INST/ Tab. PAR 17 INST
Fig. 4/c

20
Modbus address
Variable description
Type
Read /Write
U.M.
Min
value
Max
value
Function
Di
g
ital variables
1Boiler CH Enable/Re
q
uestDR/W- 01
2Boiler DHW Enable DR/W -0 1
3Boiler Water Fillin
g
Function DR/W -0 1
32 Boiler CH Mode DR -0 1
33 Boiler DHW Mode DR -0 1
34 Boiler Flame Status DR -0 1
35 Boiler Alarm Status DR -0 1
Analo
g
variables
1Boiler CH Primary Setpoint A R/W 0,1°C 20,0 80,0
2Boiler DHW Primary Setpoint A R/W 0,1°C 20,0 80,0
3Boiler DHW Setpoint A R/W 0,1°C 10,0 80,0
4Outside Temperature MB A R/W 0,1°C-55,0 95,0
5Boiler CH Curve Slope A R/W 0,13,0 40,0
6Boiler CH Curve Displacement A R/W 0,1-5,05,0
64 Boiler DHW Water Tem
p
eratureAR0,1°C 0,0 100,0
65 Boiler Primar
y
Water Tem
p
eratureAR0,1°C 0,0 100,0
66 Boiler Return Water Tem
p
eratureAR0,1°C 0,0 100,0
67 Boiler Flue Gas Tem
p
eratureAR0,1°C 0,0 200,0
68 Boiler Relative Modulation Level AR0,1% 0,0 100,0
69 Boiler Primar
y
Water Pressure AR0,1 bar 0,06,0
70 Boiler Outside TemperatureAR0,1°C -100,0 100,0
Inte
g
er variables
129Boiler Current MinuteI
R/W -0 59
130Boiler Current Hour I R/W -0 23
131Boiler Current Da
y
of the Week I R/W -1= Lun 7 = Dom
132Boiler Current Da
y
of the MonthI
R/W -1 31
133Boiler Current MonthI
R/W -1 12
134Boiler Current Year I R/W - 2000 2200
192Boiler Alarm Code IR -0100
193Boiler Slave 1 Alarm Code IR -0100
194Boiler Slave 2 Alarm Code IR -0100
195Boiler Slave 3 Alarm Code IR -0100
196Boiler Slave 4 Alarm Code IR -0100
197Boiler Slave 5 Alarm Code IR -0100
198Boiler Slave 6 Alarm Code IR -0100
199Boiler Slave 7 Alarm Code IR -0100
200Boiler Combustion Parameter
(
Par1
)
IR -0199
201Boiler H
y
draulic Parameter
(
Par2
)
IR -0199
Request CH zone 1
Enable DHW preparation
Not used
State CH zone 1
State preparation DHW
State presence flame
State presence alarm
Setpoint CH zone 1.
If you receive a value out of range
so the value isn’t received and
the boiler temperature control is
maintained of fixed point or a
temperature curve.
Setpoint CH during ACS preparation
(for PAR 66 installer parameters)
If you receive a value out of range
the value isn’t received and it is used
the boiler value regulation .
Setpoint ACS.
If you receive a value out of range
the value isn’t received and it is used
the boiler value regulation.
External value of temperature by MobBus.
If you receive a value out of range
the value isn’t received. In case of
conflict the boiler will give priority to the value
of the probe connected to it.
Slope of heating curve of zone 1
(it is used instead of the curve set in the boiler).
If you receive a value out of range
the value isn’t received and it is used
the boiler heating curve.
If you receive a value out of range
the value isn’t received and it is used
the boiler heating curve.
Shift value of room zone 1 set
(it is used instead of the shift set in the boiler).
DHW temperature sensor
CH temperature sensor (Delivery)
CH temperature sensor (Return)
Smoke temperature sensor
Modulation level: (0%= minimum boiler power
100%= maximum boiler power)
Pressure value water CH
Outside temperature read from the boiler
through the probe connected to it
Not used
Not used
Not used
Not used
Not used
Not used
Numeric code shown during boiler error
(If Master is in cascade)
Numeric code shown during slave 01 error
Numeric code shown during slave 02 error
Numeric code shown during slave 03 error
Numeric code shown during slave 04 error
Numeric code shown during slave 05 error
Numeric code shown during slave 06 error
Numeric code shown during slave 07 error
PAR 1 value
PAR 2 value
MODBUS BOILER VARIABLES LIST