Unical PELLEXIA 80, Инструкция по установке, использованию и техническому обслуживанию

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Installation instructions
3.12.5 - COMBUSTION POWER
MODULATION
The circuit board simultaneously performs three combustion
output modulations:
1. Modulation of flue gas temperature
2. Modulation of boiler temperature
3. Modulation of burner combustion (using a photosensor).
The modulation of the flue gas temperature limits the temper-
ature of the flue gas leaving the flue. A threshold is set with
the
Maximum Flue Gas Temperature parameter, which is the
nominal flue gas temperature (refer to the technical data table)
+ 15°C, and represents the maximum permitted amount of dis-
charged flue gas. The system decreases the speed of the fan
15°C before the maximum temperature, in three steps of 5°C.
For example, if the maximum allowed temperature is 140°C,
when the flue gas temperature rises, the fan is slowed down at
a set rate of 5 points for each step. If the flue gas temperature
reaches the maximum, the fan is stopped by 50 points.
Modulation of the boiler temperature is performed on an 8°C
scale in four 2°C steps, starting from the boiler working tem-
perature defined by parameter n° 0.
Furthermore, it is possible to set higher or lower modulation
according to parameter n° 14 (Modulation Step) to adjust the
fan stopping points as the temperature rises. For example, if
parameter no. 0 (Boiler working temperature) is set at 80°C and
parameter no. 14 (Modulation step) is set at 2 points, the fan
speed will be decreased by a total of 8 points.
Modulation according to the state of combustion, also known
as third modulation, uses a photosensor that detects the com-
bustion flame.
The flow of air is increased as the emissions decrease, to en-
sure the correct amount of oxygen for optimal combustion.
The three types of modulation can be performed at the same
time, calculating the decrease or increase in fan speed in a
dynamic and continuous manner, for smooth adjustment.
Temp. Lavoro Caldaia 80°C
Velocità nominale
-2 Punti
-4 Punti
-6 Punti
-8 Punti
76°C
78°C
74°C
72°C
Data available to the Technician
Data available to the User
Maximum Temp. Fumes 140°C
Boiler operating Temp. 80°C
Nominal speed
Nominal speed
Points
Points
Points
Points
Points
Points
Points
Points