Sime Planet AquaQuick 25 BF, Installer'S Instructions

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gas valve, and with the bridge connected
it is predisposed to function with the
HONEYWELL gas valve.
– Connector “Albatros” (15 fig. 17)
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.
3.2 TEMPERATURE SENSOR AND
WATER PRESSURE TRANSDUCER
Anti-freeze system with heating NTC probe
active when water temperature drops to
6°C.
Tables 3 - 4 show the resistance
values (
Ω
) that are obtained on the sensor
as the temperature varies and the transdu-
cer values obtained as the pressure varies.
When C.H. sensor (SM) is interrupted,
neither of the boiler's heating services
will function. With D.H.W. sensor inter-
rupted, the boiler will only work in hea-
ting mode.
3.3 ELECTRONIC IGNITION
Ignition and flame detection is controlled by
two electrodes located on the burner.
These guarantee maximum safety with
intervention times, for accidental swit-
ching off or gas failure, of within one
second.
3.3.1 Operating cycle
Rotate the selector knob to summer or win-
ter, and verify that green led (
) lights up
to confirm the presence of voltage.
The boiler is now ready to start working
upon demand for heating or drawing off
of D.H.W.; a discharge current is sent to
the ignition electrode through the pro-
grammer, and the gas valve opens at the
same time. The burner must be ignited
within 10 seconds.
However, it is possible for ignition failures
to occur, with consequent activation of
signal indicating that the control box has
“locked out”.
– Gas failure
The control box runs through the cycle
normally sending electric power to the
ignition electrode. The electrode conti-
nues spark discharge for a maximum of
10 sec.If the burner does not light, the
lock-out indicator will light up.
This may occur upon first ignition or
after long periods of boiler lay-off when
there is air in the pipes. It may be caused
by the gas cock being closed or by one of
the valve coils having a break in the win-
ding, so that the valve cannot open.
– Ignition electrode fails to spark
In the boiler, only the gas to the burner
is seen to open. After 10 sec. the war-
ning light indicating equipment “lock-
out” lights up.
This may be due to a break in the wire of
the electrode or to the wire not properly
fastened to the electric terminal of the
control box;
– No detection of flame
The continuous spark discharge of the
electrode is noted starting from ignition
even though the burner is lit.
Af ter 10 seconds have elapsed, the
sparks cease, the burner goes out, and
the warning light indicating equipment
“lock-out” lights up.
There could have a break in the wire of
the sensing electrode or the electrode
itself is touching earth: the electrode is
worn out and needs replacing. The con-
trol box is defective.
When there is a sudden voltage failure, the
TABLE 3 (Sensors)
Temperature (°C) Resistance (
Ω
)
20 12.090
30 8.313
40 5.828
50 4.161
60 3.021
70 2.229
80 1.669
TABLA 4 (Transducer)
Pressure Resistance (
Ω
)
(bar) mín máx
0 297 320
0,5 260 269
1 222 228
1,5 195 200
2 167 173
2,5 137 143
3 108 113
3,5 90 94
1
2
3
4
5
12 11 10 9
8
7
6
15
6 10
KEY
1 Ignition electrode earth faston
2 Ignition electrode faston
3 Fuse (F 3,15 A)
4 Fuse(0,16 AT)
5 “ANN. RIT.” connector
6 “POT. ACC.” trimmer
7 Conector “MET-GPL”
8 D.H.W. potentiometer
9 Detector electrode faston
10 “POT. RISC.” trimmer
11 C.H. potentiometer
12 Selector CR/OFF/EST/INV/RESET
13 DIP SWITCH
14 Connector “Modureg Sel.”
15 Connector “Albatros”
Fig. 17
NOTE: To gain access to trimmers (6) and
(10), unscrew the central heating potentio-
meter knob.