Characteristics; Electronic Board; Fault Finding - Sime Planet Dewy 30 BFT Notice De Montage, D'utilisation Et D'entretien

3

CHARACTERISTICS

3. 1

ELECTRONIC BOARD

ENG
The electronic boards are manufactured in
FR
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: gas
valve, safety stat, C.H. and D.H.W. sensor,
external temperature sensor (optional),
modulator, micro divertor valve, flow switch
safety valve, water pressure transducer,
exhaust gas thermostat/pressure switch,
room stat or "Logica Remote Control".
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 (32 to +140 °F).
3. 1 . 1

Fault finding

The indicator leds signalling irregular
and/or incorrect operation of the equip-
ment are indicated in fig. 19.
3. 1 .2 Devices
The electronic board is equipped with the
following devices:
– "POT. RISC." trimmer (10 fig. 20)
Sets the maximum heating power value.
To increase the value turn the trimmer
clockwise; to reduce the value turn the
Blinking red fan fault led. 30 minutes after the fan turns off, the board attempts to
restart it. To identify where the fault occurred in sequence/cascade installations, turn
the
REMOTE/OFF/SUMMER/WINTER/RESET
Red led on, ignition blocked:
rotate selector
REMOTE/OFF/SUMMER/WINTER/RESET
to release position (
to restore operation
Green led off if
power is cut-off
Flashing red led, safety stat tripped.
Rotate selector
REMOTE/OFF/SUMMER/WINTER/RESET
to release position (
to restore operation
Blinking red air pressure switch fault led
30
trimmer anticlockwise.
– "POT. ACC." trimmer (6 fig. 20)
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 (1.2 "W.C.) at the burner for methane
gas and 7 mbar (2.81 "W.C.) for 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 3 seconds following burner
ignition.
After setting the pressure level upon
ignition (STEP) according to the type of
gas, check that the pressure for heating
is still at the value previously set.
– "MET-GPL" connector (7 fig. 20)
When the connector is not connected up
the boiler is ready to operate on NATURAL
GAS.
– "ANN. RIT." connector (5 fig. 20)
In the heating phase, the electronic board
is programmed to include a burner techni-
cal delay interval of approx. 90 seconds,
which occurs both at system cold starting
and at subsequent re-ignitions. The aim is
to overcome the problem of repeated igni-
tions and turning off with very short time
intervals between. This could occur in par-
ticular in systems presenting high head los-
ses. At each restart after the period of
selector on each module to the (
tion and check where the red fault led blinks.
)
95 119 131
104 122
)
) posi-
Flashing red led,
communication fault
with "Logica Remote Control"
145 167 °F
140 158 176
Flashing red led, flame detection circuit fault
Flashing red led, heating sensor fault (SM)
(*) When all 0.5 to 2.5 bar (7 to 36 psi) leds are off,
check the water pressure transducer connection.
WARNING: the operation of plants with open ves-
sels is guaranteed only for static pressures above
0.7 bar (10.2 psi).
slow ignition, the boiler will set itself for
about 1 minute at the minimum modula-
tion pressure, and will then move to the
heating pressure value set. When the con-
necting link is inserted, both the program-
med technical pause and the period of ope-
ration at minimum pressure in the startup
phase will be cancelled. In this case, the
times elapsing between turning off and
subsequent re-ignition will depend on a
temperature dif ference of 5°C (41°F)
detected by the SM sensor (heating flow
sensor).
– DIP SWITCH (13 fig. 20)
Model "BFT" only: check that the cord-
less plugs are inserted in the position
indicated:
– "Modureg Sel." connector (14 fig. 20)
Model "BFT" only: the bridge must always
be connected.
– "Albatros" connector (15 fig. 20)
The bridge must always be disconnected.
It is connected only when multiple boilers
are installed in a sequence/cascade.
ATTENTION: It is essential that the opera-
tions described above be carried out by
authorized technical staff.
Flashing red led, water
pressure is too low (*)
Flashing red led,
plant safety
valve tripped (*)
7 14 22 36 psi
Fig. 19