Sime MURELLE HE 50 R User manual

INSTALLER INSTRUCTIONS
CONTENTS
1 DESCRIPTION OF THE BOILER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 72
2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 75
3 CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 86
4 USE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 94
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.
FONDERIE SIME S.p.A. of Via Garbo 27 - Legnago (VR) - Italy declares that its hot water boilers, which bear the CE
mark under Gas Directive 90/396/CEE and are fitted with a safety thermostat calibrated to a maximum of 110°C,
are not subject to application of PED Directive 97/23/CEE as they meet the requirements of article 1 paragraph
3.6 of the Directive.
MURELLE HE 50 R (M) - ENGLISH

72
1.1 INTRODUCTION
MURELLE HE 50 R (M) are premixed gas
condensation for heating only with wide
range of power modulation (from 20% to
100% of power) designed for single installa-
tion and in modular systems with several
generators connected in sequence/casca-
de and independent from each other.
All modules are compliant with European
Directives 2009/142/CE,
2004 / 108/CE, 2006/95/CE and
92/42/CE.
For optimum installation and operation,
always follow the instructions provided in
this manual.
1 DESCRIPTION OF THE BOILER
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
1.2 DIMENSIONS (fig. 1)
FIXTURES
R C.H. return G 1” (UNI - ISO 228/1)
M C.H. 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)
S3 Condensation outlet ø 25
CA Inlet ø 80
CS Outlet ø 80

MURELLE HE 50 R (M)
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 48.0
Heat input reduced kW 9.6
Max/min useful yield (80-60°C) % 96.9/97.5
Max/min useful yield (50-30°C) % 109.0/106.7
Useful yield at 30% of the load (40-30°C) % 107
Termal efficiency (CEE 92/42 directive) ««««
Losses after shutdown to 50°C (EN 483) W 76
Supply voltage V-Hz 230-50
Adsorbed power consumption with fixed/modulating pump (M) W 180/130
Electrical protection grade IP X4D
C.H. setting range °C 20/80
Water content boiler l 2.3
Maximum water head bar 3,5
Maximum temperature °C 85
Capacity of the heating expansion vessel l --
Pressure of the heating expansion vessel bar --
D.H.W. setting range °C --
D.H.W. flow rate (EN 625) 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 bar --
D.H.W. pressure min. nom. power bar --
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
CO2at max/min flow rate G20 % 9.5/9.2
CO2at max/min flow rate G31 % 10.0/10.3
CE certification n° 1312CM5613
Category II2H3P
Type B23-53/B23P-53P/C13-33-43-53-83
NOx emission class 5 (< 30 mg/kWh)
Weight when empty kg 38
Main burner nozzle
Quantity nozzles n° 1
G20 nozzle diameter ø 7.5
G31 nozzle diameter ø 5.5
Consumption at maximum/minimum flow rate
Maximum G20 m3/h 5.15
Minimum G20 m3/h 1.01
Maximum G31 kg/h 3.73
Minimum G31 kg/h 0.75
Gas supply pressure
G20 mbar 20
G31 mbar 37
1.3 TECHNICAL FEATURES
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74
7
1
2
3
4
5
6
8
9
10
11
Fig. 3
1.5 MAIN COMPONENTS (fig. 3)
KEY
1 Control panel
2 Safety thermostat
3 C.H. flow sensor (SM)
4 Ignition transformer
5 Ignition electrode
6 Primary exchanger
7 Air release vent
8 Sensor fumes (SF)
9 Detection electrode
10 Fan
11a Pump system fixed
11b Modulating pump system
8
4
7
5
6
10
11
2
13
14
17
12
1
CR3
G
S3
MR
1.4 FUNCTIONAL DIAGRAM (fig. 2)
Fig. 2
KEY
1 Gas valve
2 Condensate drain tap
4 Fan
5 C.H. flow sensor (SM)
6 Safety thermostat 95°C
7 Sensor fumes (SF)
8 Primary exchanger
10 C.H return sensor (SR)
11 Water pressure transducer
12 Air release vent
13 Pump system
14 Boiler discharge
17 Safety valve 3.5 bar
CONNECTIONS
R C.H. return
M C.H. flow
G Gas connection
S3 Condensation outlet
C Filling system
R3 D.H.W. tank return

The boiler must be installed in a fixed loca-
tion 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.
2.1 BOILER ROOM
The boilers MURELLE HE 50 R 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.
2.2 INSTALLATION
2.2.1 Single boiler (fig. 4)
A single function compensator kit is availa-
ble upon request: cod. 8101541.
The kit is for use on an accumulating boiler
with capacity equal to or greater than 80
litres.
2.2.2 Sequence/cascade boilers
(fig. 4 - fig. 4/a)
For sequence/cascade installations using
polypropylene smoke collectors with a cla-
pet valve, every single boiler that makes up
the heating system must have the following
installation parameters modified:
- PAR 1 = 6 (for G20 NATURAL GAS boi-
lers)
- PAR 1 = 14 (for G31 PROPANE boilers)
2 INSTALLATION
M
R
S3
G
M2
313
268
RM
330 65
700
595
M2
440,5 450
R3
170,5
268
207,5
Fig. 4
R C.H. return
M C.H. flow
G Gas connection
S3 Condensation outlet
Single installation
with kit optional code 8101541
Installation in sequence/cascade
WARNING:
- It is mandatory to arrange the thermal
system with the hydraulic separator and
safety devices.
- When replacing one or more boilers in exi-
sting plants, it is advisable to install a
heat exchanger to separate the boiler cir-
cuit from the secondary circuits. See the
pressur e cur ve for the boiler supply
shown in figure 14.
MC.H. flow
R 2” (UNI-ISO 7/1)
RC.H. 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)
75
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76
Refer to section 3.3 to access the INSTAL-
LER PARAMETERS section.
ATTENTION: In sequence/cascade instal-
lations, it is mandatory to arrange the
thermal system with the hydraulic sepa-
rator and safety devices.
The boiler is provided with the board RS-
485 that permits to manage up to 8 boi-
lers 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 (CASCA-
DE or MODBUS) by selecting the DIP SWIT-
CH 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.
MODBUS mode (fig. 4/c)
The RS-485 board can be used for MOD-
BUS communication of every MURELLE HE
50 R (M) 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 configuration
suited to the MODBUS network (PAR 17
INST) according to Table PAR 17 INST.
DIP SWITCH
GESTIONE IN CASCATA
123
CASCADE MANAGEMENT
DIP SWITCH
GESTIONE IN MODBUS
MODBUS MANAGEMENT
12 3
ON
12 3
ON
x 2
Fig. 4/a

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SCHEDA CALDAIA (MASTER)
DIP SWITCH
SCHEDINO RS-485
SCHEDA CALDAIA (SLAVE 1)
DIP SWITCH
SCHEDA CALDAIA (SLAVE ...)
DIP SWITCH
123
CONNETTORE
CABLATO CN10
(cod. 6319165
SCHEDINO RS-485
SCHEDINO RS-485
CONNETTORE
CABLATO CN10
(cod. 6319165)
CONNETTOR
E
CABLATO CN10
(
cod. 6319165
)
123 4 5 6
123 4 5 6
123 4 5 6
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)
Pmin Pm x
TS
KIT SICUREZZE ISPESL
(solo per mercato Italia)
ON
123
ON
123
ON
SONDA ESTERNA (SE) EXTERNAL SENSOR (SE)
SONDA MANDATA CASCATA (SMC) CASCADE SUPPLY PROBE (SMC)
CARATTERISTICHE CAVO:
- 3 fili di sezione almeno AWG24 - Schermato e twistato - Impedenza caratteristica almeno 100 Ω
CHARACTERISTICS
OF ELECTRIC CABLE:
IN CASO DI LUNGHEZZA DEL CAVO L > 100 m, allora inserire 2 resistenze da 120 Ω.
-
3 wires of 24 AWG
- Screened and twisted - Characteristic impedance 100 Ω
IF THE LENGTH OF CABLE L > 100 m,
then add 2 resistors of 120 Ω.
Resistenza 120 Ω
Resistor120 Ω
Resistenza 120 Ω
Resistor 120 Ω
–
+
GND
–
+
GND
–
+
GND
–
+
GND
–
+
GND
–
+
GND
Fig. 4/b
INSTALLER PARAMETER SETTING: PAR 15 CASCADE ADDRESS
-- = Not enabled 0 = Master 1...7 = Slave from 1 to 7 (ATTENTION: Avoid assigning the same number to SLAVE boilers)
NOTE: The external temperature sensor (SE) must be connected to the MASTER sensor and the cascade delivery sensor (SMC) to boiler SLAVE 1. The board sensors and connection cables are pro- vided in a kit upon request code 8092250.

78
SCHEDA CALDAIA
DIP SWITCH
SCHEDINO RS-485
123
CO
NNETT
O
R
E
C
ABLAT
O
C
N1
0
(
cod. 6319165
)
123 4 5 6
WIRED CONNECTOR
CN10
(code 6319165)
COMUNICAZIONE MODBUS
MODBUS COMMUNICATION
RS-485 BOARD
/ BOILER BOARD
ON
–
+
GND
–
+
GND
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
INSTALLER PARAMETER SETTING:
PAR 16 MODBUS ADDRESS
-- = Not enabled
1...31 = Slave from 1 to 31
(ATTENTION: Avoid calling the boi-
ler with the same number assigned
to either appliances)
PAR 17 MODBUS CONFIGURATION
-- = Not enabled
1...30 =
Default value: 25
(See Table PAR 17 INST)
ATTENTION: Upon setting the parameters, we
recommend turning the boiler off and then back on
again.

79
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Modbus address
Variable description
Type
Read /Write
U.M.
Min
value
Max
value
Function
Di
g
ital variables
1 Boiler CH Enable/Re
q
uest D R/W - 0 1 Richiesta riscaldamento zona 1
2 Boiler DHW Enable D R/W - 0 1 Abilitazione preparazione ACS
3 Boiler Water Fillin
g
Function D R/W - 0 1 Non usato
32 Boiler CH Mode D R - 0 1 Stato riscaldamento zona 1
33 Boiler DHW Mode D R - 0 1 Stato
p
re
p
arazione ACS
34 Boiler Flame Status D R - 0 1 Stato
p
resenza fiamma
35 Boiler Alarm Status D R - 0 1 Stato
p
resenza allarme
Analo
g
variables
1 Boiler CH Primary Setpoint A R/W 0,1°C 20,0 80,0
Setpoint riscaldamento zona 1.
Se viene ricevuto un valore fuori range
equivale a nessun valore ricevuto e viene
mantenuta la termoregolazione di caldaia
a punto fisso o a curva climatica.
2 Boiler DHW Primary Setpoint A R/W 0,1°C 20,0 80,0
Setpoint circuito primario durante
la preparazione ACS
(al posto di PAR 66 caldaia).
Se viene ricevuto un valore fuori range equivale
a nessun valore ricevuto e viene utilizzato
il valore di regolazione presente in caldaia.
3 Boiler DHW Setpoint A R/W 0,1°C 10,0 80,0
Setpoint acqua calda sanitaria.
Se viene ricevuto un valore fuori range
equivale a nessun valore ricevuto
e viene utilizzato il valore
di regolazione presente in caldaia.
4 Outside Temperature MB A R/W 0,1°C -55,0 95,0
Valore di temperatura esterna comunicato via ModBus.
Se viene ricevuto un valore fuori range equivale
a nessun valore ricevuto. Nel caso di conflitto
la caldaia dà la priorità al valore della sonda
ad essa collegata.
5 Boiler CH Curve Slope A R/W 0,1 3,0 40,0
Pendenza della curva climatica della zona 1
(utilizzato al posto della curva impostata in caldaia).
Se viene ricevuto un valore fuori range equivale
a nessun valore ricevuto e viene utilizzata
la curva climatica presente in caldaia.
6 Boiler CH Curve Displacement A R/W 0,1 -5,0 5,0
Valore di shift del set ambiente della zona 1
(utilizzato al posto dello shift impostato in caldaia).
Se viene ricevuto un valore fuori range equivale
a nessun valore ricevuto e viene utilizzato
lo shift presente in caldaia.
64 Boiler DHW Water Tem
p
erature A R 0,1°C 0,0 100,0 Temperatura Sonda Acqua calda sanitaria
65 Boiler Primar
y
Water Tem
p
erature A R 0,1°C 0,0 100,0 Temperatura Sonda Circuito Primario (Mandata)
66 Boiler Return Water Tem
p
erature A R 0,1°C 0,0 100,0 Temperatura Sonda Ritorno Circuito Primario
67 Boiler Flue Gas Tem
p
erature A R 0,1°C 0,0 200,0 Temperatura Sonda Fumi
68 Boiler Relative Modulation Level A R 0,1% 0,0 100,0 Livello Modulazione (0%=Minima Potenza Caldaia -
100%=Massima Potenza Caldaia)
69 Boiler Primar
y
Water Pressure A R 0,1 bar 0,0 6,0 Valore Pressione Acqua Circuito Primario
70 Boiler Outside Temperature A R 0,1°C -100,0 100,0 Valore di temperatura esterna letto
dalla caldaia tramite la sonda ad essa collegata.
Inte
g
er variables
129 Boiler Current Minute I R/W - 0 59 Non usato
130 Boiler Current Hour I R/W - 0 23 Non usato
131 Boiler Current Da
y
of the Week I R/W - 1 = Lun 7 = Dom Non usato
132 Boiler Current Da
y
of the Month I R/W - 1 31 Non usato
133 Boiler Current Month I R/W - 1 12 Non usato
134 Boiler Current Year I R/W - 2000 2200 Non usato
192 Boiler Alarm Code I R - 0 100 Codice numerico visualizzato durante
anomalia caldaia (Master se in cascata).
193 Boiler Slave 1 Alarm Code I R - 0 100 Codice numerico visualizzato
durante anomalia caldaia slave 1
194 Boiler Slave 2 Alarm Code I R - 0 100 Codice numerico visualizzato
durante anomalia caldaia slave 2
195 Boiler Slave 3 Alarm Code I R - 0 100 Codice numerico visualizzato
durante anomalia caldaia slave 3
196 Boiler Slave 4 Alarm Code I R - 0 100 Codice numerico visualizzato
durante anomalia caldaia slave 4
197 Boiler Slave 5 Alarm Code I R - 0 100 Codice numerico visualizzato
durante anomalia caldaia slave 5
198 Boiler Slave 6 Alarm Code I R - 0 100 Codice numerico visualizzato
durante anomalia caldaia slave 6
199 Boiler Slave 7 Alarm Code I R - 0 100
Codice numerico visualizzato
durante anomalia caldaia slave 7
200 Boiler Combustion Parameter
(
Par1
)
I R - 0 199 Valore del PAR 1 in caldaia
201 Boiler H
y
draulic Parameter
(
Par2
)
I R - 0 199 Valore del PAR 2 in caldaia
Request CH zone 1
Enable DHW preparation
Not used
State CH zone 1
Descrizione /
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
TABELLA DELLE VARIABILI MODBUS /
MODBUS BOILER VARIABLES LIST

80
CASCADE+MODBUS mode (fig. 4/d)
This mode allows for MODBUS communica-
tion of at least two boilers in cascade and is
performed by requesting another RS-485
board provided in the kit code 8092244.
ATTENTION: Communication will occur
only with the MASTER boiler, (boiler with
PAR 15 = 0), interpreting the cascade as
a single heat capacity generator:
P CASCADE = P BOILER x No. BOILERS.
To install the second board, proceed as fol-
lows:
- Remove the cover and electrically con-
nect the second RS-485 board equipped
with lid to the RS-485 board already
installed in the MASTER boiler (boiler with
PAR 15 = 0) with the wired connector
provided in the kit.
CAUTION: Insert the wired connector
with caution.
- Set the DIP SWITCH of the new board in
MODBUS mode.
- Close the lid of the second board.
- Choose the communication configuration
suited to the MODBUS network (PAR 17
INST) according to Table PAR 17 INST.
RS-485 connection to the INSOL/ZONA
MIX (fig. 4/e)
The RS-485 board can be connected to
optional INSOL kit code 8092254 or ZONA
MIX code 8092252. Both require the
board housing kite code 8092236.
Carry out the electrical connections as indi-
cated in the figure.
CAUTION: For electrically connecting the
INSOL/ZONA MIX board to the boiler
board, refer to the instruction leaflet pro-
vided in the kit.
CN10
Schedino
INSOL/ZONA MIX e kit
lloggi mento sched
CN10
COMUNICAZIONE
MODBUS
MODBUS
COMMUNICATION
123 4 5 6
Schedino
INSOL/ZONA MIX e kit
lloggi mento sched
Fig. 4/e
CN10
COMUNICAZIONE
MODBUS
MODBUS
COMMUNICATION
CONNETTORE CABLATO
(cod. 6319173)
WIRED CONNECTOR
(cod 6319173)
123 4 5 6
Fig. 4/d
123
DIP SWITCH
GESTIONE IN MODBUS
MODBUS MANAGEMENT
12 3
ON
INSTALLER PARAMETER SETTING:
PAR 16 MODBUS ADDRESS
-- = Not enabled
1...31 = Slave from 1 to 31
(ATTENTION: Avoid calling the
boiler with the same number
assigned to other appliances)
PAR 17 MODBUS CONFIGURATION
-- = Not enabled
1...30 =
Default value: 25
(See Table PAR 17 INST)
Module with 1 RS-485 board Module with 2 RS-485 board
INSOL / ZONA MIX
board and kit board
housing
INSOL / ZONA MIX
board and kit board
housing

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2.3 CONNECTING UP SYSTEM
To protect the heat system from damaging
corrosion, incrustation or deposits, before
installation it is extremely important to
clean the system using suitable products
such as, for example, Sentinel X300 (new
system), X400 and X800 (old system) or
Fernox Cleaner F3. Complete instructions
are provided with the products but, for
further information, you may directly con-
tact SENTINEL PERFORMANCE SOLU-
TIONS LTD or FERNOX COOKSON ELECTRO-
NICS.
For long-term protection agains corrosion
and deposits, the use of inhibitors such as
Sentinel X100 or Fernox Protector F1 is
recommended after cleaning the system. It
is important to check the concentration of
the inhibitor after each system modifica-
tion and during maintenance following the
manufacturer’s instructions (specific tests
are available at your dealer).
The safety valve drain must be connected
to a collection funnel to collect any dischar-
ge during inter ventions. If the heating
system is on a higher floor than the boiler,
install the on/off taps supplied in kit optio-
nal on the heating system delivery/return
pipes.
WARNING: Failure to clean the heat
system or add an adequate inhibitor inva-
lidates the device’s warranty.
Gas connections must be made in accor-
dance with current standards and regula-
tions. When dimensioning gas pipes from
the meter to the module, both capacity
volume (consumption) in m3/h and gas
density must be taken into account.
The sections of the piping making up the
system must be such as to guarantee a
supply of gas sufficient to cover the maxi-
mum demand, limiting pressure loss
between the gas meter and any apparatus
being used to not greater than:
– 1.0 mbar for family II gases (natural gas);
– 2.0 mbar for family III gases (butane or
propane).
An adhesive data plate is sticked inside the
front panel; it contains all the technical data
identifying the boiler and the type of gas for
which the boiler is arranged.
2.3.1 Connection of condensation
water trap
The drip board and its water trap must be
connected to a civil drain through a pipe
with a slope of at least 5 mm per metre to
ensure drainage of condensation water.
The plastic pipes normally used for civil
drains are the only type of pipe which is
appropriate for conveying condensation
to the building’s sewer pipes.
2.3.2 Filter on the gas pipe
The gas valve is supplied ex factory with an
inlet filter, which, however, is not adequate
to entrap all the impurities in the gas or in
gas main pipes.
To prevent malfunctioning of the valve, or in
certain cases even to cut out the safety
device with which the valve is equipped,
install an adequate filter on the gas pipe.
2.4 INITIAL PHASE
SYSTEM FILLING
The charge pressure, at cold start, must
be 1 bar.
The filling is to be done slowly to allow air
bubbles to escape through the air vents.
2.4.1 System draining (fig. 5)
To drain the system, turn off the boiler and
use the discharge valve (1 fig. 5).
1
2
3
Fig. 5
KEY
1 Boiler discharge
2a Pump system fixed
2b Modulating pump system
3 Safety valve 3.5 bar

82
2.5 EXHAUST
The boiler is supplied with a 80 mm gasket,
which must be fitted over the exhaust termi-
nal prior to the flue being installed
(11 fig. 6 -
fig. 7 - fig. 8).
2.5.1 Type B (fig. 6)
If the inlet is not connected, the boiler should
be regarded a Type B device. When instal-
ling the boiler in locations where it needs to
be protected from water, replace the intake
terminal inserted in the flange with terminal
code 8089510.
For information on how to configure the boi-
ler in this mode see figure
6.
The maximum overall length of ø 80 exhau-
st flues is determined by the load losses of
the single accessories installed and should
not exceed 16 mmH2O
.
The exhaust pipe can be connected to exi-
sting chimneys.
When the boiler works at low temperature
is possible to use normal chimneys at the
following conditions:
– The chimney must not be used by other
boilers.
– The inside of the chimney must be pro-
tected from direct contact with the boi-
ler condensation. Combustion products
must be conveyed with a flexible piping
or rigid plastic pipes with a diameter of
about 100-150 mm providing so to the
condensation siphoned drainage at the
end of the pipe. The useful height of the
siphon must be at least 150 mm.
2.5.2 Type C (fig. 7 - fig. 8)
The boiler becomes a Type C device when
the intake terminal is removed from the
flange and the intake is connected to sepa-
rate exhaust ducts (fig. 7) or with coaxial
exhaust (fig. 8).
2.5.3 Maximum usable length
for separate ø 80 flues
The maximum overall length of ø 80 suc-
tion and exhaust flues is determined by
the load losses of the single accessories
inst a l l e d a n d s h o u l d n o t exc e e d 16
mmH2O.
When the segment of piping is between 11-
16 mm H2O it is necessary to check and, if
needed, correct the maximum and mini-
mum pressure adjustment of the gas valve
as specified in point 4.2.2.
2.5.4 Maximum usable
length for coaxial
ø 80/125 flues
In installations with ø 80/125 coaxial
exhaust, the maximum horizontal length
in cludin g the 90° cur ve, sho uld not
exceed 5 m.
For roof exits it should not exceed 8 m
along vertical.
When the segment of pipe is between 2-5
m horizontal / 4-8 m vertical, it is neces-
sary to check and, if needed, correct the
maximum and minimum pressure adjust-
ment of the gas valve as specified in point
4.2.2.
WARNING:
Before installing accessories, lubricate the internal part of
gaskets with silicon-based products. Avoid using oils and
greases.
KEY
1 90° MF polypropylene curve (6 pcs.) code 8077450
2 a Polypropylene extension L. 1000 (6 pcs.) code 8077351
2 b Polypropylene extension L. 500 (6 pcs.) code. 8077350
3 Hinged tile code 8091300
4 Roof terminal kit L. 1381 code 8091204
5 Polypropylene extension L. 250 with socket code 6296513
6 45° MF polypropylene curve (6 pcs.) code 8077451
7 Exhaust terminal code 8089501
8 Internal-external ring nut kit code 8091500
11 Rubber gasket ø 80 (supplied as standard)
Type B
Fig. 6
ø 80 ACCESSORY LOAD LOSS TABLE
Accessory ø 80 Load loss
(mm H2O)
90° MF polypropylene curve 0,80
45° MF polypropylene curve 0,40
Polypropylene extension L. 1000 0,40
Polypropylene extension L. 500 0,20
Roof exit terminal L. 1381 1,30
Exhaust terminal 1,50
Polypropylene extension L. 250 with socket 0,10

83
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WARNING:
- Installations with roof exit terminal (4a) and coaxial
exhaust (13) require the use of a condensation reco-
very (12) that has to be connected to the water drain
siphon (waste water).
- The installation of the roof exit terminal (4a) requires
the removal of the two ø 60 and ø 100 reducers.
- Before installing accessories, lubricate the internal
part of gaskets with silicon-based products. Avoid
using oils and greases.
TABLE OF LOAD LOSSES OF ACCESSORIES
Fig. 7
KEY
1 90° MF polypropylene curve (6 pcs.) code 8077450
2 a Polypropylene extension L. 1000 (6 pcs.) code 8077351
2 b Polypropylene extension L. 500 (6 pcs.) code. 8077350
3 Hinged tile code 8091300
4 Roof terminal kit L. 1381 code 8091204
4 a Coaxial roof exit terminal code 8091205
5 Polypropylene extension L. 250 with socket code 6296513
6 45° MF polypropylene curve (6 pcs.) code 8077451
7 Exhaust terminal code 8089501
8 Internal-external ring nut kit code 8091500
9 Air inlet terminal (supplied with unit)
10 Inlet/exhaust fitting code 8091401
11 Rubber gasket ø 80 (supplied as standard)
12 Condensation recovery L. 135 code 8092800
13 Coaxial exhaust ø 80/125 L. 885 code 8091210
Type C (separate ø 80 flues and
coaxial exhaust terminal)
Type C (separate ø 80 flues)
Load loss
(mm H2O)
Inlet
Exhaust
90° MF polypropylene curve 0,80 0,80
45° MF polypropylene curve 0,45 0,45
Polypropylene extension L. 1000 0,35 0,45
Polypropylene extension L. 500 0,15 0,20
Coaxial roof exit terminal + Fitting (pos. 10) - 4,00
Roof exit terminal L. 1381 - 1,30
Exhaust terminal - 1,50
Air inlet terminal 0,20 -
Polypropylene extension L. 250 with socket - 0,10
Coaxial exhaust L. 885 + Fitting (pos. 10) - 5,00
Condensation recovery L. 135 1,80 -

84
Type C (ø 80/125 coaxial exhaust)
NOTES:
- Installation requires the use of a condensation recovery (12) that must be
connected to a water drain siphon (waste water).
- The installation of the coaxial roof exit terminal (4a) requires the removal of
the two ø 60 and ø 100 reducers.
- Before installing accessories, lubricate the internal part of gaskets with sili-
con-based products. Avoid using oils and greases.
- Inserting each supplementary 90° elbow reduces the available segment by
2 metres and Inserting each supplementary 45° elbow reduces the availa-
ble segment by 1 metre.
KEY
2 a Extension ø 80/125 L. 1000 code 8096171
2 b Extension ø 80/125 L. 500 code 8096170
3 Hinged tile code 8091300
4 a Coaxial roof exit terminal code 8091205
10 Inlet/exhaust fitting with test outlet code 8091401
11 Rubber gasket ø 80 (supplied as standard)
12 Condensation recovery ø 80 L. 135 code 8092800
13 Coaxial exhaust ø 80/125 L. 885 code 8091210
14 a 90° curve ø 80/125 code 8095870
14 b 45° curve ø 80/125 code 8095970
Fig. 8
Model H (m) L (m)
Murelle HE 50 R (M) 8 5
2.6 ELECTRICAL CONNECTION
The boiler is supplied with an electric cable.
Should this require replacement, it must be
purchased exclusively from SIME.
The electric power supply to the boiler must
be 230V - 50Hz single-phase through a
fused main switch, with at least 3 mm spa-
cing between contacts.
Respect the L and N polarities and the
earth connection.
NOTE: SIME declines all responsibility for
injury or damage to persons, animals or
things, resulting from the failure to provi-
de for proper earthing of the appliance.
2.6.1 Chronothermostat connection
Connect the chronothermostat as indica-
ted in the boiler electrical diagram (see fig.
11) after having removed the existing brid-
ge. The chronothermostat to be used must
be of a class conforming to the standard
EN 607301 (clean electrical contact).
2.6.2 Climatic regulator CR 53
connection (optional)
The boiler is designed for connectio to a cli-
matic regulator, supplied on request (code
8092227), for the management of a hea-
ting circuit. The electronic card will conti-
nue to manage information visualisation,
the setting of the sanitary set and the hea-
ting of the second circuit, and the boiler
parameters by means of the keys on the
control panel. For installation and use of
the climatic regulator, follow the instruc-
tions included in the packaging.
NOTE: Reset parameter 10 to 2 (PAR 10
= 2).
2.6.3 Remote control CR 73
connection (optional)
The boiler is designed for connection to a
remote control unit, supplied on request
(code 8092226). The remote control unit
CR 73 allows for complete remote control
of the boiler, except release of the boiler.
The boiler display will show the following
message:
For installation and use of the remote con-
trol, follow the instructions in the package.
NOTE: Ensure PAR 10 set to 1 (PAR 10 =
1).
2.6.4 External sensor connection
The boiler is designed for connection to an
external temperature sensor, supplied on
request (code 8094101), which can auto-
matically regulate the temperature value of
the boiler output according to the external
temperature. For installation, follow the
instruction in the package. It is possible to
make corrections to the values read by the
drill acting on the PAR 11.

2.7 BOILER ELECTRICAL (fig. 11)
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)
Fig. 11
KEY
F1-2 Fuse (4 AT)
TRA Ignition transformer
PI System pump
V Fan
EA Ignition electrode
ER Detection electrode
EV1-2 Gas valve coil
TS Safety thermostat
SF Sensor fumes
TFU Thermal fuse
SM C.H. flow sensor
SR C.H. return sensor
TPA Pressure transducer
JP1 Selection TA2 or 0-10 VDC
TA1 Zone 1 environment thermostat
TA2 Zone 2 environment thermostat
SB/SA D.H.W. sensor L. 2000 (optional)
CR Remote control CR73 (optional)
SE External sensor (optional)
OP Programming clock (optional)
AR Remote alarm
VZ Zone valve
AUX Auxiliary connection
RS-485 CASCADE/MODBUS board
NOTE: Connect TA1 to the clamps 7-8 after
having removed the bridge.
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
CN18 code 6319147 (M)
85
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86
3 CHARACTERISTICS
3.1 CONTROL PANEL (fig. 12)
5
3
1
2
4
DESCRIPTION OF DISPLAY ICONS
SUMMER MODE ICON
WINTER MODE ICON
D.H.W. MODE ICON
HEATING MODE ICON
1 = First circuit heating
2 = Second circuit heating
Flashing = Third circuit heating
GRADED POWER SCALE
The segments of the bar light up in proportion to boiler power
output .
2 - DESCRIPTION OF CONTROLS
ON/OFF KEYS
ON = Electricity supply to boiler is on
OFF = Electricity supply to boiler is on but nor ready for
functioning. However, the protection functions
are active.
SUMMER MODE KEY
When this key is pressed, the boiler functions only
when D.H.W. is requested
(function not available)
WINTER MODE KEY
When this key is pressed, the boiler provides heating
and D.H.W.
D.H.W. TEMP KEY
When this key is pressed, the temperature of the
D.H.W. is shown on the display
(function not available)
HEATING TEMP KEY
The first time the key is pressed, the temperature of
heating circuit 1 is shown.
The second time the key is pressed, the temperature
of heating circuit 2 is shown.
The third time the key is pressed, the temperature of
heating circuit 3 is shown.
RE-SET KEY
This allows for restoring functioning after a functioning
anomaly.
INCREASE AND DECREASE KEY
By pressing this key the set value increases or decrea-
ses.
BURNER FUNCTIONING AND BLOCK ICON
DESCRIPTION OF DISPLAY ICONS
CHIMNEY SWEEP ICON
SECONDARY DIGITS
The boiler visualises the value of the pressure of the
system (correct value is between 1 and 1.5 bar)
3 - KEYS RESERVED FOR THE INSTALLER
(access to INST and OEM parameters)
4 - LUMINOUS BAR
Blue = Functioning
Red = Functioning anomaly
5 - PROGRAMMING CLOCK (optional)
Mechanical clock (code 8092228) or digital clock (code
8092229) to program heating and water supply.
MAIN DIGITS
The boiler visualises the values set, the state
of anomaly and the external temperature
Fig. 12
PC CONNECTION
To be used only with the SIME programming kit and only
by authorised personnel. Do not connect other electro-
nic devices (cameras, telephones, mp3 players, etc.)
Use a tool to remove the cap and reinsert after use.
ATTENTION: Communication port
sensitive to electrostatic charges.
Before use, it is advisable to touch an earthed metallic
surface to discharge static electricity.
INFORMATION KEY
This key can be pressed several times to view the para-
meters.
CHIMNEY SWEEP KEY
This key can be pressed several times to view the para-
meters.
DECREASE KEY
This key changes the default settings.
INCREASE KEY
This key changes the default settings.
INTEGRATIVE SOURCES ICON

87
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1. Visualizzazione temperatura esterna
solo con sonda esterna collegata
2. Visualizzazione temperatura sonda
mandata riscaldamento (SM)
3. Visualizzazione temperatura sonda
sanitario (SS) solo per caldaie istantanee
4. Visualizzazione temperatura sonda
ausiliaria o sonda bollitore (SB)
6. Visualizzazione temperatura
riscaldamento riferita al primo circuito
7. Visualizzazione temperatura
riscaldamento riferita al secondo circuito
9. Visualizzazione numero giri ventilatore in rpm x 100 (es. 4.800 e 1.850 rpm)
10. Visualizzazione ore di funzionamento del bruciatore in h x 100 (es. 14.000 e 10)
11. Visualizzazione numero di accensioni del bruciatore x 1.000 (es. 97.000 e 500)
5. Visualizzazione temperatura sonda
fumi (SF)
8. Vi sualizzazi one corr en te
di ioniz zazione in µA
17. Visualizzazione por tata sanitaria flussimetro (es. 18 l/min
e 0,3 l/min) o stato flussostato (rispettivamente ON e OFF)
12. Visualizzazione numero totale
delle anomalie
13. Contatore accessi parametri
installatore (es. 140 accessi)
14. Contatore accessi parametri
OEM (es. 48 accessi)
15. Contatore accessi parametri
CASCATA OEM (es. 05 accessi)
2. Visualisation of C.H. flow sensor (SM)
3. Visualisation of D.H.W. temperature sensor
(SS) only for instantaneous boilers
4. Visualisation of auxiliary temperature sensor
or D.H.W. sensor (SB)
6. Visualisation of heating temperature of first
circuit
7. Visualisation of heating temperature of
second circuit
8. Visualisation of ionisation current in µA
10. Visualisation of hours of functioning of the burner in h x 100 (e.g. 14000 and 10)
11. Visualisation of number of times the burner has ignited x 1000 (e.g. 97000 and 500)
12. Visualisation of total number
of anomalies
5. Visualisation of smoke temperature sensor
(SF) 13. Parameter access counter–
Installer (i.e. 140 accesses)
14. Parameter access counter–OEM
(i.e. 48 accesses)
3.2 ACCESS TO INSTALLER'S INFORMATION
For access to information for the installer, press the key (3 fig. 14). Every time the key is pressed, the display moves to the next item of
information. If the key is not pressed, the system automatically quits the function. If there is no expansion board (ZONA MIX or INSOL) the
relative info shall not be displayed. List of information:
1. Visualisation of external temperature, only
with external sensor connected
9. Visualisation fan speed in rpm x 100 (e.g. 4.800 and 1850 rpm)
15. Parameter access counter–CASCADE
OEM (i.e. 05 accesses)
17. Visualisation of D.H.W. flowmeter load (i.e. 18 l/min and 0.3 l/min) or flow switch (respec-
tively ON and OFF)

88
20. Visualizzazione valore sonda mandata impiant o miscelato
con schedino ZONA MIX 1 (ingresso S2)
21. Visualizzazione termostato sicurezza ZONA MIX (ingresso S1)
rispettivamente ON e OFF
22. Visualizzazione pompa con schedino ZONA MIX 1
(rispettivamente ON e OFF)
23. Visualizzazione comando apertura valvola con
schedino ZONA MIX 1 (rispettivamente ON e OFF)
24. Visualizzazione comando chiusura valvola
con schedino ZONA MIX 1 (rispettivamente ON e OFF)
25. Visualizzazione valore della sonda mandata impianto miscelato
con schedino ZONA MIX 2
26. Visualizzazione t ermostato sicurezza con schedino
ZONA MIX 2 (ingresso S1) rispettivamente ON e OFF
27. Visualizzazione pompa con schedino ZONA MIX 2
(rispettivament e ON e OFF)
28. Visualizzazione comando apertura valvola con schedino
ZONA MIX 2 (rispettivamente ON e OFF)
29. Visualizzazione comando chiusura valvola con schedino
ZONA MIX 2 (rispettivamente ON e OFF)
30. Visualizzazione valore temperatura sonda solar e S1
con schedino solare INSOL
31. Visualizzazione valore temperatura sonda solare S2
con schedino solare INSOL
32. Visualizzazione valore temperatura sonda solar e S3
con schedino solare INSOL
33. Visualizzazione relè solare R1 con schedino solare INSOL
(rispettivament e ON e OFF)
34. Visualizzazione relè solare R2 con schedino solare INSOL
(rispettivament e ON e OFF)
35. Visualizzazione relè solare R3 con schedino solare INSOL
(rispettivament e ON e OFF)
18. V isualizzazione valor e sonda ritorno riscaldament o (SR)
19. V isualizzazione valore sonda colle tt ore cascata
40. Visualizzazione valore % comando pompa PWM
36. Visualizzazione s t at o flussostato solare
(rispettivament e ON e OFF)
61. Visualizzazione codice
errore penultima anomalia
60. Visualizzazione codice
errore ultima anomalia
70. Codice di warning 90. Versione software presente
su RS-485 (es. versione 01)
20. Visualisation delivery probe value mixed with board ZONA MIX 1 (input
S2)
21. Visualisation safety thermostat ZONA MIX (input S1) respectively ON and
OFF
22. Visualisation pump with board ZONA MIX 1 (respectively ON and OFF)
23. Visualisation valve opening control with board ZONA MIX 1 (respectively
ON and OFF)
24. Visualisation valve closing control with board ZONA MIX 1 (respectively
ON and OFF)
25. Visualisation of the plant delivery probe mixed with board ZONA MIX 2
26. Visualisation safety thermostat with board ZONA MIX 2 (input S1)
respectively ON and OFF
27. Visualisation pump with board ZONA MIX 2 (respectively ON and OFF)
28. Visualisation valve opening control with board ZONA MIX 2 (respectively
ON and OFF)
29. Visualisation valve closing opening control with board ZONA MIX 2 (respectively ON
and OFF)
30. Visualisation solar probe temperature value S1 with solar board INSOL
31. Visualisation solar probe temperature value S2 with solar board INSOL
32. Visualisation solar probe temperature value S3 with solar board INSOL
33. Visualisation solar relay R1 with solar board INSOL (respectively ON and
OFF)
34. Visualisation solar relay R2 with solar board INSOL (respectively ON and
OFF)
35. Visualisation solar relay R3 with solar card INSOL (respectively ON and
OFF)
18. Visualisation C.H. return sensor value (SR)
19. Visualisation collector probe value
36. Visualisation solar flow meter state (respectively ON and OFF)
40. Visualisation % value pump control PWM
60. Visualisation of error
code of last anomaly
70. Code warning
61. Visualisation of error code of penul-
timate anomaly
90. Software version on RS-485 (e.g.
version 01)

89
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3.3 ACCESS TO
INSTALLER'S
PARAMETERS
For access to the installer's parameters,
press simultaneously the keys and
or 2 seconds (3 fig. 12).
For example, the parameter PAR 23 is
visualised on the display of the control
panel in the following way:
T he p ar am e te r s s cr o ll f o r wa rd s a nd
backwards with the key and and
the default parameters can be changed
with the keys and .
The standard visualisation returns automa-
tically after 60 seconds, or by pressing one
of the control keys (2 fig. 12) excluded the
key RESET.
3.3.1 Replacing the board or
RESETTING parameters
If the electronic board is replaced or reset,
it is necessary to configure PAR 1 and PAR
2 by associating the following values to
each type of boiler to be able to restart the
boiler:
PARAMETERS INSTALLER
FAST CONFIGURATION
PAR DESCRIPTION RANGE UNIT OF INC/DEC DEFAULT
MEASUREMENT UNIT SETTING
1 Combustion configuration -- = ND = = “- -”
1 ... 16
2 Hydraulic configuration -- = ND = = “- -”
1 ... 5
3 Timetable 2 programmer 1 =
DHW + Recirc. pump = = 1
2 = DHW
3 = Recirculation pump
4 Pressure transducer disabler 0 = Disabled = = 1
1 = Enabled 0-4 BAR
2 = Enabled 0-6 BAR
3 = Enabled 0-4 BAR (NO ALL)
4 = Enabled 0-6 BAR (NO ALL)
5 Assignment of auxiliary relay AUX 1 = Remote supply = = 1
(D.H.W. tank) 2 = Recirculation pump
3 = Automatic load.
4 = Remote alarm NC
5 = Heat pump
6 = Zone 2 valve
6 Luminous bar indicating presence 0 = Disabled = = 1
of voltage 1 = Enabled
7 Allocation of CR73 channels 0 = Not assigned = = 1
1 = Circuit 1
2 = Circuits 1 and 2
3 = Three-zone circuit
8 Fan rpm Step ignition 0,0 ... 81
rpmx100 0,1 from 0,1 to 19,9 0,0
1 from 20 to 81
9 Long chimneys 0 ... 20 % 1 0
10 Remote control option setting 1 = CR 73 = = 1
2 = CR 53
3 = RVS 43.143
4 = RVS 46.530
5 = RVS 61.843
11 Correction values external sensor -5 ... +5 °C 1 0
12 Backlighting duration -- = Always sec. x 10 1 3
1 = Never
1 ... 199
13 Modulating pump speed -- = None % 10 --
AU = Automatic mod.
30...100 = % Settable
modulation
14 Setting second input TA -- = Contact TA -- -- --
5...160 = Input 0...10VDC
15 Cascade address -- = Not enabled -- 1 --
0 = Master
1...7 = Slaves
16 ModBus address -- = Not enabled -- 1 --
1...31 = Slaves
17 ModBus communication configuration 1 ... 30 -- 1 25
19 Type circuit 0 = Two zones -- -- 0
1 = Three zones
D.H.W. - HEATING
PAR DESCRIPTION RANGE UNIT OF INC/DEC DEFAULT
MEASUREMENT UNIT SETTING
20 Minimum heating temperature Zone 1 PAR 64 OEM ... PAR 21 °C 1 20
21 Maximum heating temperature Zone 1 PAR 20 ... PAR 65 OEM °C 1 80
22 Heating curve slope Zone 1 3 ... 40 -- 1 20
23 Minimum heating temperature Zone 2 PAR 64 OEM ... PAR 24 °C 1 20
24 Maximum heating temperature Zone 2 PAR 23 ... PAR 65 OEM °C 1 80
25 Heating curve slope Zone 2 3 ... 40 -- 1 20
26 Minimum heating temperature Zone 3 PAR 64 OEM ... PAR 27 °C 1 20
27 Maximum heating temperature Zone 3 PAR 26 ... PAR 65 OEM °C 1 80
28 Heating curve slope Zone 3 3 ... 40 -- 1 20
29 ∆t heating circuit 10 ... 40 °C 1 20
30 Post-circulation heating time 0 ... 199 Sec. 10 30
31 Maximum heating capacity 30 ... 100 % 1 100
32 Zone 1 pump activation delay 0 ... 199 10 sec. 1 1
33 Start-up delay 0 ... 10 Min. 1 3
34 Additional source activation threshold -- , -10 ... 40 °C 1 “- -”
35 Boiler antifreeze 0 ... +20 °C 1 3
36 External sensor antifreeze -5 ... +5 °C 1 -2
37 Band saturation -- =
Disabled % 1 100
flowmeter modulation 0 ... 100
38 D.H.W. post-circulation time 0 ... 199 Sec. 1 0
39 Anti-legionella 0 =
Disabled -- -- 0
(only D.H.W tank)) 1 =
Enabled
GAS MODEL PAR 1
-1
-2
METHANE - 3
(G 20) - 4
Single (50 R) 5
Sequence/cascade 6
-7
-8
-9
-10
-11
PROPANE - 12
(G 31) Single (50 R) 13
Sequence/cascade 14
-15
-16

90
NOTE: the inside of the upper door of the
boiler panel has a label with the values
that have to be set for PAR 1 and PAR 2
(fig. 19).
3.3.2 Warning
Should the boiler operation not be optimal
but no alarm sets off, press the button
until info 70 and the warning code
asso c i a t ed to t h e o n going event are
displayed.
Once optimal operation is restored, info 70
will display: “- -”.
Below is the table of warning codes:
PARAMETERS INSTALLER
EXPANSION CARD
PAR DESCRIPTION RANGE UNIT OF INC/DEC DEFAULT
MEASUREMENT UNIT SETTING
40 Number of expansion boards 0 ... 3 = 1 0
41 Mix valve stroke time 0 ... 199 10 sec. 1 12
42
Priority of D.H.W. over mixed zone 0 = Paralle = = 1
1 = Absolute
43 Floor drying 0 = No activated = = 0
1 = Curve A
2 = Curve B
3 = Curve A+B
44 Type of solar system 1 ... 7 = 1 1
45
∆ t solar collector pump 1 PAR 74 OEM - 1... 50 °C 1 8
46 Solar integration delay “--”, 0 ... 199 Min. 1 0
47 Tmin solar collector “--”, -30 ... 0 °C 1 - 10
48 Tmax solar collector “--”, 80 ... 199 °C 1 120
PARAMETERS RESTORATION
PAR DESCRIPTION RANGE UNIT OF INC/DEC DEFAULT
MEASUREMENT UNIT SETTING
49 * Reset default parameters -- , 1 = = =
(par 01 - par 02 = “-“)
* In case of difficulty in understanding the current setting or in case of an anomalous or
incomprehensible conduct of the boiler, we suggest to restore the initial values of the parameters
setting PAR 49 = 1 and the PAR 1 and PAR 2 as specified at point 3.3.1.
BOILER PAR 2
Instant with deviator valve 1
and flowmeter
Instant with deviator valve, 2
flowmeter and solar combination
D.H.W. tank with
deviator valve and boiler sensor 3
vers. T (LOW INERTIA)
On board D.H.W. tank with
deviator valve and D.H.W. sensor 4
(LOW INERTIA)
Remote D.H.W. tank with deviator
valve and D.H.W. thermostat 5
(LOW INERTIA)
or heating only vers. T/R boiler
CODE DESCRIPTION
E0 Reduced capacity operation
(
∆ t between delivery and return
over 40°C)
E1 Shorted external sensor (SE)
E2 TBD
E3 TBD
E4 TBD
E5 TBD
E6 TBD
E7 TBD
E8 TBD
E9 TBD
CASCADE CONNECTION PARAMETERS
When the appliance is installed in sequence/cascade (modular
system with several generators) it is necessary to set the fol-
lowing INST parameter on all connected burners:
PAR 15 = 0 for the first boiler (MASTER)
1 .... 7 for the other boilers (SLAVE)
(Avoid assigning the same number to SLAVE boilers)
Set the following INST parameter if polypropylene smoke collec-
tors with a clapet valve are used in sequence/cascade installa-
tions:
PAR 1 = 6 (for NATURAL GAS boilers)
14 (for PROPANE boilers)
In addition, when the number of boilers in cascade is more than
two, configure the parameters OEM A1 of the MASTER boiler.
To access the OEM parameters press simultaneously the buttons
( and ) for 2 seconds. Entered in the INST level again press
simultaneously he buttons ( and ) for another 2 seconds. At
this point insert the access code formed by this sequence of
INSTALLATOR BUTTONS:
“ + / - / < / > / < “.
Set the parameter:
PAR A1 = Number of cascade generators (3 ... 8)