Baxi CRONO 10-L, Installation, Assembly, And Operating Instructions For The Installer

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25
GB
7. MAINTENANCE
The burner requires a periodic maintenance carried out by a
qualified and authorized technician.
Maintenance is essential for the reliability of the burner, avoi-
ding the excessive consumption of fuel and consequent pollu-
tion.
Before carrying out any cleaning or control always first
switch off the electrical supply to the burner acting on the main
switch of the system.
The basic checks are:
y
Check that there are no obstructions or dents in the supply
or return oil pipes.
y
Clean the filter in the oil suction line and in the pump.
y
Clean the photoresistance, (7, fig. 1, page 3).
y
Check for correct fuel consumption.
y
Replace the nozzle and check the correct position of
electrodes (fig. 13, page 13).
y
Clean the combustion head in the fuel exit area, on the dif-
fuser disc.
y
Leave the burner working without interruptions for 10 min.
and correctly set all the components stated in this manual.
Then carry out a combustion check verifying:
– Smoke temperature at the chimney.
– Content of CO2 (%).
– Content of CO (ppm).
– Smoke value according to opacity smoke index according
to Bacharach scale.
8. FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for some problems that could cause a failure to start or a bad
working of the burner. A fault usually makes the lock-out lamp light which is situated inside the reset button of the control box
(3, fig. 1, page 3). When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the burner
functions correctly, the lock-out can be attributed to a temporary fault.
If however the lock out continues the cause must be determined and the solution found.
Warning
The manufacturer cannot accept responsibility for any damage to persons, animals or property due to error in installation or in the
burner adjustment, or due to improper or unreasonable use or non observance of the technical instruction enclosed with the burner, or
due to the intervention of unqualified personnel.
FAULTS POSSIBLE CAUSES SOLUTION
The burner will not start
when the adjustment
thermostat closes.
Lack of electrical supply.
Check presence of voltage in the L1 - N clamps
of the 7 pin plug.
Check the conditions of the fuses.
Check that the thermostat limit is not locked out.
The photoresistance sees false light. Eliminate the light.
Heater or start thermostats are faulty.
(CRONO 2-L, 3-L and 5-L)
Replace them.
The connections in the control box are wron-
gly inserted.
Check and completely connect all the plugs.
Burner runs normally in
the prepurge and ignition
cycle and locks out after
5 seconds ca.
The photoresistance is dirty. Clear it.
The photoresistance is defective. Change it.
Flame moves away or fails.
Check fuel pressure and output.
Check air output.
Change nozzle.
Check the solenoid valve coil.
Burner starts with an
ignition delay.
The ignition electrodes are wrongly
positioned. Adjust them according to the instructions of this
manual.
Air output is too high.
Set the air output according to the instructions
of this manual.
Nozzle dirty or worn. Replace it.