elco L 03.240 DUO, Руководство по эксплуатации

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03/2005 - Art. Nr. 13 018 067A
19
Function
Operating mode
Safety mode
Schematic diagram
1 Two-stage fuel-oil pump cpl.
2 Fuel-oil pressure regulator, Full
load
3 Solenoid valve, Full load
4 Fuel-oil pump
5 Fuel-oil-pressure regulator,
Partial load
6 Solenoid valve, Partial load
7 Nozzle line
8 Turbulator
9 Flame tube
10 Burner motor
11 Air flap
12 El. air-flap actuation
Burner start-up
–
Depending on the heat requirement
at the boiler regulator, the automatic
control unit starts up the program
sequence.
–
Fan motor starts up, ignition
sequence activates.
–
Pre-ventilation with opened air flap
(air flap is only closed when burner is
shut down).
–
Solenoid valve 6 opens, pressure
regulation via part-load pressure
regulator
5 .
–
Flame begins to burn.
–
Ignition system disconnects.
Burner operation, regulation
between part- and full load
The burner functions with one nozzle
and with two fuel-oil pressures for part-
and full load. The fuel-oil pressures are
regulated independently of each other
by two pressure regulators in the pump.
When a requirement from the boiler
regulator is detected, the burner
switches over - after no less than 13
seconds.
–
from part- to full load - Air flap 12 is
moved into position by the air-flap
actuating mechanism.
–
On systems fitted with variable
air-flap adjustment, solenoid valve
3
closes, part-load pressure regulator 5
is deactivated, full-load pressure
regulator
2 takes over pressure
regulation.
–
Air flap moves on into full-load
position, full-load is in operation.
Safety function
A safety shutdown is carried out:
–
if a flame indication is present during
pre-ventilation (detection of
unauthorised flame)
–
if no flame is present at startup (fuel
release) after 5 sec. (safety period)
–
if no flame is present after flame
failure during operation, and an
unsuccessful attempt has been made
to repeat the program.
The fault indicator lamp lights up
whenever a safety shutoff has been
carried out. The system can be reset
(once the fault has been remedied) by
pressing the "Release" button.
EN