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20163082
Start-up, calibration and operation of the burner
Tab. P
6.11 Operation
Burner without modulating operation kit
Once the start-up cycle is completed, the servomotor command
moves on to the thermostat/pressure switch TR that controls the
pressure or the temperature in the boiler.
If the temperature or the pressure is low (so the thermostat/
pressure switch TR is closed), the burner progressively
increases the output as far as the MAX value (point “P9”).
If the temperature or the pressure increases as far as the
opening of the thermostat/pressure switch TR, the burner
progressively reduces the output as far as the MIN value
(point “P1”). The sequence repeats endlessly.
The burner stops when the heat request is less than the heat
supplied by the burner at MIN output.
The thermostat/pressure switch TL opens, the control box
carries out the switching off phase.
The air damper closes completely to reduce heat losses to a
minimum.
As an alternative to control through TR, the command for burner
modulation can be made also using a 4-20 mA signal.
Burner with modulating operation kit
See manual enclosed with the adjuster kit.
6.12 Motor lockout
If the motor does not start, it could be because of a thermal relay
intervention due to its incorrect calibration or problems with the
motor or the main power supply, to release press the button of the
thermal relay, see .
6.13 Ignition failure
If the burner does not switch on, there is a lockout within 3s of the
electrical supply reaching the gas valve.
It may be that the gas does not arrive at the combustion head
within the safety time of 3s.
In this case increase gas ignition flow rate.The arrival of gas to
the pipe coupling is displayed on the pressure gauge, as shown
in (Fig. 26 on page 27).
6.14 Burner flame goes out during operation
If the flame should go out during operation, the burner will lockout
within 1s.
950
Relay request status (coded in bits)
Bit 0 = 1: Alarm
Bit 1 = 2: Safety valve
Bit 2 = 4: Ignition
Bit 3 = 8: Fuel valve 1
Bit 4 = 16: Fuel valve 2
Bit 5 = 32: Fuel valve 3/ pilot valve
1 - Reading only 0 255 1 0 Info mode
954 Flame intensity 1 % Reading only 0% 100% 1% 0% Info mode
960 Actual output 1
m
3
/h, l, h,
ft
3
/h, gal/h
Reading only 0 6553,5 0,1 0 Info mode
961 Status of external modules and visualisation 1 - Reading only 0 255 1 0 Info mode
981 Memory error: Code 1 - Reading only 0 255 1 0 Info mode
982 Memory error: diagnostic code 1 - Reading only 0 255 1 0 Info mode
992 Error indicators 10 - Reset 0
0xFFFFFF
FF
1 0 Service mode
Parameter
No. of
elements
Unit of
measure-
ment
Modifica-
tion
Values interval
Degree of
precision
Predefined
setting
Access mode
No. Description Min. Max.
In the event the burner stops, in order to prevent
any damage to the installation, do not unblock the
burner more than twice in a row.
If the burner locks out for a third time, contact the
customer service.
In the event there are further lockouts or faults
with the burner, the maintenance interventions
must only be carried out by qualified, authorised
personnel, in accordance with the contents of this
manual and in compliance with the standards and
regulations of current laws.
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