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Parameter
No.
Description
•
Error chronology: 701-725.03.Error class
•
Error chronology: 701-725.04.Phase
•
Error chronology: 701-725.05.Start-up meter
725
Error chronology: 701-725.06.Load
900
PROCESS INFORMATION
Actual output
903
Index 0 = fuel
Index 1 = air
Position of the servomotors
922
Index 0 = fuel
Index 1 = air
Heat source active
1 = output during the definition of the curves
2 = manual output
942
3 = BACS output
4 = analogue input output
5 = output of the external load regulator contacts
Result of the sampling of the contact (codified in bits)
Bit 0.0 = 1: Minimum pressure switch
Bit 0.1 = 2: Maximum pressure switch
Bit 0.2 = 4: Pressure switch control valves
Bit 0.3 = 8: Air pressure switch
Bit 0.4 = 16: Open load check
Bit 0.5 = 32: ON load check
947
Bit 0.6 = 64: Closed load check
Bit 0.7 = 128: Safety circuit
Bit 1.0 = 1: Safety valve
Bit 1.1 = 2: Ignition
Bit 1.2 = 4: Fuel valve 1
Bit 1.3 = 8: Fuel valve 2
Bit 1.4 = 16: Fuel valve 3/ pilot valve
Bit 1.5 = 32: Reset
Relay request status (coded in bits)
Bit 0 = 1: Alarm
Bit 1 = 2: Safety valve
950
Bit 2 = 4: Ignition
Bit 3 = 8: Fuel valve 1
Bit 4 = 16: Fuel valve 2
Bit 5 = 32: Fuel valve 3/ pilot valve
954
Flame intensity
960
Actual output
961
Status of external modules and visualisation
981
Memory error: Code
982
Memory error: diagnostic code
992
Error indicators
7.5
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.
20205255
Control and display
Unit of
No. of
Modifica-
measure-
elements
tion
ment
25
-
Reading only
25
-
Reading only
25
-
Reading only
25
%
Reading only
2
%
Reading only
2
(°)
Reading only
1
-
Reading only
2
-
Reading only
1
-
Reading only
1
%
Reading only
3
m
/h, l, h,
1
Reading only
3
ft
/h, gal/h
1
-
Reading only
1
-
Reading only
1
-
Reading only
10
-
Reset
The thermostat/pressure switch TL opens, the flame control
carries out the switching off phase.
The air damper closes completely to reduce heat losses to a
minimum.
Burner with modulating operation kit
See manual enclosed with the adjuster kit.
50
GB
Values interval
Degree of
precision
Min.
Max.
0
6
1
0
255
1
0
99999999
1
0%
100%
0.1%
0%
100%
0.1%
-50°
150°
0.01°
0
255
1
0
255
1
0
255
1
0%
100%
1%
0
6553,5
0,1
0
255
1
0
255
1
0
255
1
0xFFFFFF
0
1
FF
Predefined
Access mode
setting
0
Info mode
0
Info mode
0
Info mode
0%
Info mode
0%
Info mode
0°
Info mode
0
Service mode
0
Info mode
0
Info mode
0%
Info mode
0
Info mode
0
Info mode
0
Info mode
0
Info mode
0
Service mode
Tab. P
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