Characteristics; Electronic Board - Sime Format.ZIP Serie Manual De Instrucciones Para El Instalador

3

CHARACTERISTICS

3. 1

ELECTRONIC BOARD

The electronic boards are manufactured in
compliance with the EEC 73/23 low-voltage
directives. They are supplied with 230V and,
through a built-in transformer, send a volta-
ge of 24V to the following components:
modulator, D.H.W./C.H. sensors, room stat,
water flowmeter and time programmer.
An automatic and continuous modulation
system enables the boiler to adjust the heat
output to the various system requirements
or the User's needs. The electronic compo-
nents are guaranteed against a temperatu-
re 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.
– "POT. ACC." trimmer (6)
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
2 10
KEY
1 "Heat output" trimmer
2 Fuse (F 1,6A)
3 D.H.W. potentiometer
4 Connector "METHANE/GPL"
of approx. 3 mbar at the burner for
methane gas and 7 mbar for butane gas
(G30) and propane gas (G31).
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.
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;
1 8 4
3
5 Connector "Delay cancellation"
6 "Ignition power" trimmer
7 Block red led
8 C.H. potentiometer
9 Bi-colour led gree/orange
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 failure.
Red led on, ignition blocked/safety and smokes stats tripped:
turn the rotary switch in the position
( ) to restore functioning
7
6
9
5
10 Connector "TA"
NOTE: To have access to the regulating
trimmers (1) and (6) take off the C.H.
potentiometer knob.
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. 90
seconds, which occurs both at system
cold starting and at subsequent re-igni-
tions. The aim is to overcome the pro-
blem of repeated ignitions and turning off
with very short time intervals between.
This could occur in particular in systems
presenting high head losses.
At each restart after the period of slow
ignition, the boiler will set itself for about
1 minute at the minimum modulation
pressure, and will then move to the hea-
1 6
Fig. 14
Fig. 15
81