Ecoflam AZUR 40 Manuel D'instructions page 16

B LB 476 Azur 40 -60 Blu120 P/ MC
ADJUSTMENT OF GAS FLOW RATE FOR SINGLE-STAGE VERSION (MB-DLE)
To adjust the gas flow rate, loosen screw R and turn the regulator; to the right (screwing) to reduce; to the left
(unscrewing) to increase. At the end tighten screw R.
ADJUSTMENT OF FAST OPENING'S HYDRAULIC BRAKE
The adjustment procedure is the same for both single-stage (MB-DLE) and two-stage (MD-ZRDLE) versions.
To adjust the fast opening's hydraulic brake, unscrew cover T and through its upper side turn pin Q. Screw to reduce
the opening speed; unscrew to increase. Screw cover T after regulation.
REGOLAZIONE DELLE ELETTROVALVOLE GAS MULTIBLOC
2
Q
1
7
6 5
WORKING OF THE BURNER WITH THE LEAKAGE CONTROL DEVICE
When the thermostats are closed, the gas leakage control device checks the valve seals by pressurizing the circuit
between the two gas valves. When test pressure is reached the device remains in stand-by for about 25 seconds.
At the end of the test the yellow pilot light on the control device lights up and the burner is enabled to carry out the
start-up cycle. If the seal on one of the valves is faulty and this causes a drop in test pressure, the device puts the system
into the safety condition and the red pilot right on the device lights up.
The flame control device starts the burner fan to carry out prewashing of the combustion chamber,checking fan air
pressure via the air pressure switch. After preventilation the ignition transformer starts operating, generating a spark
between the electrodes and simultaneously the gas valves open (safety gas valve VS and first stage operating valve VL).
If the flame does not ignite or goes out, total safety is ensured by an ionization detection probe.
The safety time limit in the event of no flame is less than 2 seconds at start-up and less than 1 during operation.
In the event of no gas being supplied or of a considerable drop in pressure the minimum gas pressure switch interrupts
burner operation. About 20/30 seconds after ignition the flame control device commands operation of the second
stage via the gas valve and air servocontrol, thus taking the burner to maximum power.
MB-DLE (1F)
T
P
3
11
R
10
9
8
VPS 504 (OPTIONAL)
1 Pressure governor adjustment
2 Fast opening hydraulic brake's adjustment
3 Flow rate adjustment (Low flame flow rate
adjustment for AB version)
4 High flame flow rate adjustment
5 Inlet pressure port
6 Pressure governor membrane's bleed
7 Minimum presure switch adjustment
(VPS 504)
8 Pressure port after gas filter
9 Pressure port after pressure governor.
During leakage control test, is used to measure test pressure
(~150 mbar). When
burner is running, it is used to measure governor's outlet
pressure.
10 Working lamp (yellow)
11 Leakage control device rearm button (red)
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