16
5 DESCRIPTION OF THE APPLIANCE
5.1
Characteristics
MURELLE HT
are last generation condensing wall mounted boil-
ers which
Sime
has produced for heating and domestic hot wa-
ter production. The main design choices made by
Sime
for the
MURELLE HT
boilers are:
– the total pre-mix microflame burner combined with a steel
heat exchanger for heating and a rapid heat exchanger for
DHW
– the sealed combustion chamber which can be classified "Type
C" or "Type B" in relation to the room where the boiler is in-
stalled, depending on the smoke outlet configuration adopted
during installation
– the command and control microprocessor electronic board
provides efficient management of both heating and hot wa-
ter production. It can also be connected to a remote control
with an Open Therm protocol or to room thermostat and/or
external sensor. If connected to an external sensor, the boiler
temperature varies on the basis of the external temperature
according to a selected optimal climatic curve providing sig-
nificant energy and economic savings.
Other special features of the
MURELLE HT
boilers are:
– the anti-freeze function which activates automatically if the
temperature of the water inside the boiler falls below the val-
ue set under parameter "PAR 7" and, where there is an exter-
nal sensor, if the external temperature falls below the value
set under parameter "PAR 8"
– the anti-blocking 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 pa-
rameters and combustion efficiency
– domestic hot water comfort function which allows the time
necessary for the hot water to become available to be reduced
and ensures that the temperature is stable
– screen display of the operating and self-diagnostic parame-
ters 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 HT
boilers are equipped with the following check
and safety devices:
– thermal safety thermostat 100°C
– 3 bar relief valve
– heating water pressure transducer
– delivery sensor
– return sensor (SR)
– DHW sensor
– smoke flue gas probe.
d
IT IS FORBIDDEN
to commission the appliance with safety devices which
do not work or which have been tampered with.
a
WARNING
Safety device may only be replaced by professional
qualified personnel using
Sime
original spare parts.
5.3
Identification
The
MURELLE HT
boilers can be identified by means of:
1 Packaging label:
this is located on the outside of the packag-
ing and provides a code, the serial number of the boiler and
the bar code
2 Energy Efficiency Label:
this is positioned on the outside of
the packaging to notify the User of the level of energy sav-
ings and reduced environmental pollution produced by the
appliance
3 Technical Data Plate:
this is located inside the front panel of
the boiler and provides the technical specification, appliance
performance and any other information required by law.
1
3
1
I II
A
B
C
D
E
F
G
2015
811/2013
Cod. 6244745
dB
kW
A
++
A
+
A
B
C
D
E
F
G
2
2
3
Fig. 28
