Sime MURELLE HE 110 R ErP Manual De Instrucciones página 75

3.4 EXTERNAL SENSOR
(fig. 13)
If there is an external sensor, the hea-
ting settings SET can be taken from the
climatic curves according to the external
temperature and, in any case, limited to
with the range values described in point
3.3 (parameters PAR 22 for zone 1, PAR
25 for zone 2 and PAR 28 for zone 3).
The climatic curve to be set can be
selected from a value of 3 and 40 (at
step 1). Increasing the steepness of the
curves of fig. 13 will increase the output
temperature as the external temperatu-
re decreases.
3.5 CARD
FUNCTIONING
The electronic card has the following
functions:
– Antifreeze protection of the heating
and sanitary water circuits (ICE).
– Ignition and flame detection system.
– Control panel setting for the power
and the gas for boiler functioning.
– Anti-block for the pump which is fed
for a few seconds after 24 hours of
inactivity.
– Antifreeze protection for boilers with
an accumulation boiling unit.
– Chimney sweep function which can be
activated from the control panel.
– Temperature which can be shifted with
the external sensor connected.
It can be set from the control panel
and is active on the heating systems of
both circuit 1 and circuit 2 and 3.
– Management of 3 independent heating
circuit systems.
– Automatic regulation of the ignition
power and maximum heating.
Adjustments are managed automati-
cally by the electronic card to guaran-
tee maximum flexibility in use of the
system.
– Interface with the following electronic
systems: remote control SIME HOME
code 8092281, thermal
RVS, connected to a management
card of a mixed zone ZONA MIX code
8092275/76, card SOLAR code 8092277
and to board MODBUS code 8092278.
NOTE: If using CR 53 set parameter
10 to 2 (PAR 10 = 2).
3.6 TEMPERATURE
DETECTION SENSOR
Table 4 shows the resistance values of
the heating, DHW and exhaust fumes
thermistors.
If the C.H. flow sensor (SM), C.H. return
sensor (SR) and the exhaust fumes sen-
sor (SF) is faulty or open circuit, the
boiler will not function.
ATTENTION: curves are calculated at an ambient temperatu-
re of 20°C. The user can act on the boiler controls to change
the environment set for which the bend has been calculated
by ±5°C.
TABLE 4 (SM - SR - SF sensors)
Temperature (°C)
20
30
40
50
60
70
80
regulator
3.7 ELECTRONIC
IGNITION
Ignition and flame detection is control-
led by a single electrode on the burner
which guarantees reaction in the case of
accidental extinction or lack of gas within
one second.
3.7.1 Functioning cycle
Burner ignition occurs within max. 10
seconds after the opening of the gas
valve. Ignition failure with consequent
activation of block can be due to:
– Lack of gas
The ignition electrode persists in
discharging for max. 10 seconds. If the
burner does not ignite, the anomaly is
signalled.
This can happen the first time the boi-
Resistance (Ω)
ler is switched on after a long period of
12.090
inactivity due to the presence of air in
8.313
the gas pipes
5.828
It can be caused by a closed gas tap or
4.161
by a broken valve coil (the interruption
3.021
does not allow for opening).
2.229
1.669
– The electrode does not discharge.
In the boiler, only the opening of the
gas to the burner can be detected. After
10 seconds the anomaly is signalled. It
can be caused by an interruption in
the electrode wire or if it is incorrectly
anchored to the connection points. Or
the electrode may be earthed or stron-
gly worn: it must be replaced.
Or the electronic card may be defecti-
ve.
– No flame detected
After start-up the electrode continues
to discharge even when the burner is
on. After 10 seconds, the discharge
stops, the burner is switched off and a
fault is generated.
This fault is sometimes caused by the
shorting of the electrode cable or by
its improper fixing to the connection
points. The electrode is connected to
the earth or badly worn and must be
ES
PT
ENG
Fig. 13
75