Operating Cycle - Lamborghini Caloreclima EM 16/M-E Manual Para La Instalación Y El Mantenimiento

OPERATING CYCLE

Depending on the device with which air gate operation servo control is interlocked, the burner
can operate in two different modes: gradual two-stage, if the control unit is of the on/off type,
continuous flame modulation if the device is of the modulating type.
GRADUAL TWO-STAGE MODE
2 stage
nd
1 stage
st
ignition.
This is obtainable with a standard open/close (on/off) boiler thermostat (or pressure switch)
so by means of the servo control, the air gate operates in two positions: minimum (1
or maximum opening (2
from one to the other takes place gradually and smoothly. From the illustrated diagram, the
following characteristic sequences can be seen:
a) Stop sequence: with the burner stopped, the air gate is in closed position to prevent the
air from entering and cooling the combustion chamber of the boiler and fl ue.
b) Preventilation sequence: the air gate is in the fully open position with subsequent return
to partially closed position corresponding to the ignition delivery (with gas flow always
closed).
c) Ignition flame formation sequence: the electronic gas valve coils are energized and the
gas regulator is partially open according to the pressure of the ignition air.
d) Main flame or second stage switchover sequence: the servo control commands ope-
ning of the air (up to maximum delivery setting) and the increase in pressure causes a
gradual increase in gas flow.
e) Maximum delivery to first stage switchover sequence: the boiler thermostat/pressure
switch (regulator) acts on the servo control thus closing the air.
CONTINUOUS MODULATION OPERATION
ignition
min. 30%
AIR
GAS
stage). We have gradual two-stage operation because the change
nd
AIR
GAS
1 sec. max
operation
1 sec. max
Modular operation
39
M
time
stage)
st
time
UK