31
Rev. 12GB0712
SYSTEMA S.p.A.
AIRTIGHT GAS CONVECTORS
3.12 Utilization of the weekly pro-
grammer (optional)
1) Push the programmer disk sectors corresponding to
the period of operation desired towards the center
(for example, from 08.00 AM Monday morning until
20.00 PM Tuesday). The red sector that appears at
the edge of the disk indicates the period of device
starting.
2) Set the right time by rotating the white reference
triangle at the center of the programmer disk clock-
wise.
3) When setting starting at 08.00 AM Monday and
switch-off at 20.00 PM Tuesday, the device will
always start and stop at the same time and day,
week after week.
3.13 Malfunctions and solutions for pilot flame devices (Mod. K21, K28, K40,
K55, K28V, K40V, K55V)
Draw 33
DEFECTS CAUSES SOLUTIONS
1. The burner pilot flame fails to
light.
a) There is no gas or the pressure is
too high.
a) Check the supply pressure on the
valve (5 Draw 30).
b) There is no electrical spark dis-
charge on the burner.
b) Check the spark plug, cable and
piezoelectric element.
c) The pilot flame nozzle is clogged
or inadequate to the type of gas
being used (Methane or LPG).
c) Replace using original spare parts.
2. The burner pilot flame lights but
goes off when the dial is relea-
sed.
a) The dial (1 Draw 30) has been
released before ten seconds have
passed.
a) Keep the dial pressed down for
more than ten seconds.
b) The thermocouple has oxidized. b) Replace using original spare parts.
c) The solenoid valve coil is malfunc-
tioning.
c) Replace using original spare parts.
3. The main burner flame goes off.
a) The gas pressure reaching the
nozzle is too high.
a) Adjust the pressure to the rating
plate values using the pressure
tap (4 Draw 30).
b) The wrong type of nozzle has
been used.
b) Replace using the right type of
nozzle for the type of gas being
used.
c) The flue gas expulsion pipe has
not been perfectly connected bet-
ween the cast-iron casting and the
external anti-wind grille.
c) Check the connection seal.
d) The anti-wind grille has been clog-
ged.
d) Clean the grille.
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