Characteristics; Electronic Board - Sime FORMAT.zip 4 25 OF Manual Del Instalacion

IT
3

CHARACTERISTICS

ES
3. 1 ELECTRONIC
BOARD
PT
The electronic boards are manufactured in
compliance with the EEC 73/23 low-voltage
GB directives.
They are supplied with 230V and, through a
built-in transformer, send a voltage of 24V
to the following components: modulator,
GR
D.H.W./C.H. sensors, room stat, water
flowmeter and time programmer.
An automatic and continuous modulation
RO
system enables the boiler to adjust the heat
output to the various system requirements
or the User's needs.
The electronic components are guaran-
RUS
teed against a temperature range of 0°
to +60°C.
3. 1 . 1 Fault finding
The indicator leds signalling irregular
and/or incorrect operation of the equip-
ment are indicated in fig. 14.
3. 1 .2 Devices
The electronic board is equipped with the
following devices (fig. 15):
– "POT. RISC." trimmer (1)
Sets the maximum heating power value.
To increase the value turn the trimmer
clockwise; to reduce the value turn the
trimmer anticlockwise.
KEY
1 "Heat output" trimmer
2 Fuse (F 1,6A)
3 D.H.W. potentiometer
4 Connector "METHANE/GPL"
78
– "POT. ACC." trimmer (6)
1
2 10 3
Bi-colour green led off if power is cut-off.
Bi-colour orange led: C.H. sensor (SM) fault.
Green led flashing: fan/smoke pressure switch/smokes stat failure.
Orange led flashes if water pressure is insufficient (vers. "25 OF")
Red led on, ignition blocked/safety stat tripped:
turn the rotary switch in the position ( )
Trimmer to vary the pressure level upon
ignition (STEP), of the gas valve.
According to the type of gas for which
the boiler is equipped, the trimmer must
be regulated so as to obtain a pressure
of approx. 3 mbar at the burner for
methane gas and 8 mbar for LPG.
To increase pressure, turn the trimmer
clockwise; to reduce pressure, turn the
trimmer counterclockwise.
The slow ignition pressure level can be
set during the first 10 seconds following
burner ignition.
7
6
9
5
8 4
5 Connector "Delay cancellation"
6 "Ignition power" trimmer
7 Block red led
8 C.H. potentiometer
9 Bi-colour led gree/orange
to restore functioning
After setting the pressure level upon
ignition (STEP) according to the type of
gas, check that the pressure for hea-
ting is still at the value previously set.
– Connector "METANO-GPL" (4)
With the connector disconnected, the
boiler is ready to function with METHANE;
with the connector connected with GPL.
– "ANN. RIT." connector (5)
In the heating phase, the electronic
board is programmed to include a bur-
ner technical delay interval of approx.
1
10 Connector "TA"
NOTE: To have access to the regula-
ting trimmers (1) and (6) take off the
C.H. potentiometer knob.
Fig. 14
6
Fig. 15