BURNER DESCRIPTION Two stage gas burner. The burner meets protection level of IP X0D (IP 40) as EN 60529. According to Directives: EMC 89/336/EEC - 2004/108/EC, Low Voltage 73/23/EEC - 2006/95/EC and Machines 98/37/EEC - 2006/42/EC. Gas train according to EN 676. ...
FIRING RATES 916T1 915T1 D8831 10.000 20.000 30.000 40.000 50.000 60.000 70.000 80.000 kcal/h Thermal power 918T1 917T1 D8832 50.000 100.000 200.000 250.000 kcal/h Thermal power In the BS4D model type 918T1, in order to guarantee the working with an output of 220 - 250 kW, remove the blank deadening to free the supplementary slits of the air inlet on the cover.
CORRELATION BETWEEN GAS PRESSURE AND BURNER OUTPUT To obtain the maximum output, a gas head pressure of 9.3 mbar, relatively to 916T1 model, is measured (M2, see chapter 3.6, page 7) with the combustion chamber at 0 mbar using gas G20 with a net heat value of 10 kWh/m (8.570 kcal/m D8933...
3.2 BOILER FIXING To fit the burner to the boiler it is necessary to carry out the following: Widen, if necessary, the insulating gasket holes (3, fig. 3). Fix the flange (5) to the boiler door (1) using four screws (4) and (if necessary) the nuts (2) interposing the insulating gasket (3) but keep unloosing one of the two upper screws (4) (see fig.
3.4 GAS TRAIN, (as EN 676) The gas train is supplied separately, for its adjustment see the enclosed instructions. GAS TRAIN CONNECTIONS MATCHED BURNER TYPE CODE INLET OUTLET MB ZRDLE 405 B01 3970539 BS1D Rp 1/2 Flange 1 Natural gas and LPG MB ZRDLE 405 B01 3970540 BS2D...
WORKING 4.1 COMBUSTION ADJUSTMENT Fig. 9 In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjust- ment and testing must be carried out observ- ing the instruction manual of the boiler, including verification of the CO and CO con- centration in the flue gases, their tempera- tures and the average temperature of the...
AIR DAMPER ADJUSTMENT, (fig. 10) Fig. 10 First start-up must always be performed, adjusting screw (12), so that the 1 stage air damper position pointer is beyond mark 1, (factory setting mark 1). To adjust, proceed as follows: Take the burner to 2 stage by closing the T6-T8 connection found in the 4-pin plug (X4, wiring on page 8).
4.5 AIR PRESSURE SWITCH The air pressure switch is set after all other adjustments have been made. Begin with the switch at the lowest setting. With the burner working at the required output, adjust the dial clockwise, increasing its value until the burner shuts down.
MAINTENANCE Disconnect the electric supply to the burner by switching off the main power switch and close the gas shut-off valve before maintaining or checking the system. The burner requires scheduled maintenance that must be carried out by qualified personnel and in compli- ance with local legislation.
SIGNAL PROBABLE CAUSE Min. air pressure switch does not close or is already closed before the limit thermostat closed: 3 pulses – air pressure switch faulty; – air pressure switch incorrectly regulated. Light present in the chamber before the burner’s switching on or off: 4 pulses –...
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FAULTS POSSIBLE CAUSES SOLUTION Restore correct maximum ratio of 1:2, Output ratio between 1 and 2 stage making sure 1 stage output is no less greater than 1:2. Burner tends to pull the than the operating range's minimum. flame when switching ...
FAULTS POSSIBLE CAUSES SOLUTION The pressure switch is faulty, change it. The air pressure switch does not change over to the operational po- The air pressure is too low, (the head is sition. bad adjusted). The burner locks out during the prepurge The flame exists.
SAFETY WARNINGS The dimension of the boiler’s combustion chamber must respond to specific values, in order to guarantee a combustion with the lowest polluting emissions rate. The Technical Service Personnel will be glad to give you all the imformation for a correct matching of this burner to the boiler.