Sime PLANET 25/60 BF, Manual

Page: 99 / 160

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3.1 ELECTRONIC PANEL
Made in accordance with the Low Voltage
EEC directive 73/23, supplied with 230
Volt; via a transformer it sends 24 Volt to
the following components: gas valve, safety
stat, C.H. and D.H.W. sensors, external
temperature sensor (optional), modulator,
water pressure transducer, smoke stat,
room stat or “Logica Remote Control”.
An automatic and continuous modulating
system allows the boiler to adjust the
power t o t he var ious plant or user
demands. The electronic components are
guaranteed to work in a temperature
range between 0 and +60 °C.
3.1.1 Functioning faults
The leds that show an irregular and/or
incorrect functioning of the apparatus are
shown in fig. 20.
3.1.2 Devices
The electronic panel has the following
devices:
– Trimmer “POT. RISC.” (10 fig. 21)
It regulates the maximum value of hea-
ting power. To increase the value turn
the trimmer in a clockwise direction and
to decrease it turn the trimmer in an
anti-clockwise direction.
– Trimmer “POT. ACC.” (6 fig. 21)
Trimmer for the changing of the ignition
pressure level (STEP) of the gas valve.
According to the type of gas for which
the boiler is predisposed, the trimmer
must be regulated so as to provide the
burner with a pressure of around 3
mbar for methane gas or 7 mbar for
but ane gas (G30) and propane gas
(G31). To increase the pressure turn the
trimmer in a clockwise direction, to
decrease it turn the trimmer in an anti-
clockwise direction. The level of pressure
of slow ignition is able to be set during
the first 5 seconds from the starting of
the burner. After having established the
level of pressure at ignition (STEP) accor-
ding to the type of gas, check that the
heating gas pressure is still on the value
set beforehand.
– Connector “MET-GPL” (7 fig. 21)
With the connector disconnected, the
boiler is ready to function with METHANE;
with the connector connected with GPL.
– Connector “ANN. RIT.” (5 fig. 21)
The electronic panel is programmed, in
heating phase, with a technical pause by
the burner of around 90 seconds, both
at the beginning when the plant is cold
and in the subsequent startings. This is
so to avoid ignitions and switching off
with very short intervals, that may in par-
ticular be found in plants with high losses.
At every restarting, following the period
of slow ignition, the boiler will position
itself for around 1 minute to the mini-
mum modulating pressure to then return
to the set value of heating pressure.
With the insertion of the bridge both the
technical pause programmed and the
period of functioning at minimum pressu-
re in the ignition phase will be eliminated.
In such a case, t he time t hat r uns
between the switching off and the next
ignition will be in function of a variance of
5°C, as shown by the C.H. sensor (SM).
– DIP SWITCH (13 fig. 21)
Ensure that the riders are inserted in
the position shown in order for the boiler
to work:
– Connector “Modureg Sel.” (14 fig. 21)
With the bridge disconnected the boiler
is predisposed to function with the SIT
gas valve, and with the bridge connected
it is predisposed to function with the
HONEYWELL gas valve.
– Connector “Albatros” (15 fig. 21)
The bridge must always be disconnected.
It is connected only when multiple boilers
are installed in a sequence/cascade.
ATTENTION: All of the operations descri-
bed above must be carried out by authori-
sed personnel.
3 CHARACTERISTICS
2.10.3 Gradient of the characteristic
heating curve
The gradient of the characteristic heating
curve is imposed on the current value
“15”
of Logica. Increasing the gradient as shown
in the drawing of fig. 19, the C.H. flow tem-
perature increases in correspondence to
the outside temperature.
EXAMPLE: Choosing a gradient of 15 with
an outside temperature of –10°C we shall
have a C.H. flow temperature of 60°C.
2.11 EXTERNAL TEMPERATURE
SENSOR
The "Logica Remote Control" can be con-
nected to an external temperature sensor
available an optional extra (code 8094100).
This configuration ensures and maintains
the required temperature constant in the
room. The ambient temperature is, in fact,
indicted and evaluated as the calculated
mean of the value measured inside and out-
side the dwelling.
For installation, follow the assembly instruc-
tions inserted in the package.
Fig. 19