Riello BS1D, Manual

20023724

14

GB

Burner tends to pull the
flame when switching
from 1

st

 to 2

nd

 stage.

Output ratio between 1

st

 and 2

nd

 stage

greater than 1:2.

Restore correct maximum ratio of 1:2,
making sure 1

st

 stage output is no less

than the operating range's minimum.

High air excess in 1

st

 stage.

Restore the correct air excess value (



min.  = 1.3) see section “4.4 combustion
control”.

The burner runs nor-
mally in the prepurge
and ignition cycle and
locks out after about 3
seconds.

Phase and neutral connection is
inverted.

Invert them.

The earth connection lacks or is in-
efficient.

Make the earth connection efficient.

The ionization probe is earthed or not
in contact with the flame, or its wiring
to the control box is broken, or there
is a fault on its insulation to the earth.

Check the right position and if neces-
sary set it according to the instructions
of this manual.

Reset the electrical connection.

Replace the faulty connection.

The burner starts with
an ignition delay.

The ignition electrodes is wrongly
positioned.

Adjust it according to the instructions
of this manual.

Air output is too high.

Set the air output according to the in-
structions of this manual.

Valve brake is too close with insuffi-
cient gas output.

Adjust it.

The burner doesn’t
change over the 2nd
stage.

The air damper is locked.

Check the right working.

Check the right electrical connection.

The 2nd stage gas valve doesn’t
pull in.

Failed valve: replace it.

The air damper doesn’t close com-
pletely and therefore it doesn’t pull in
the 2nd stage valve micro: check the
micro working.

The burner locks out
after the prepurge
phase due to flame-
failure.

The solenoid valves is passing too
little gas.

Check the pressure in the network and/
or adjust the solenoid valve according to
the instructions of this manual.

The solenoid valves are defective.

Change them

The ignition arc is irregular or has
failed.

Check the right insertion of the
connectors.

Check the right position of the elec-
trode according to the instructions of
this manual.

The pipe has not been purged from
the air.

Carry out a complete breathing of the
line of gas-supply.

FAULTS

POSSIBLE CAUSES

SOLUTION