Riello GAS 7 P/M, Installation, Use And Maintenance Instructions

Page 1: ...Installation use and maintenance instructions 2915245 5 05 2018 Forced draught gas burner Progressive two stage or modulating operation CODE MODEL TYPE 3753781 GAS 7 P M 537 T80 GB ...

Page 2: ... M These products are in compliance with the following Technical Standards EN 676 EN 12100 and according to the European Directives MD 2006 42 EC Machine Directive LVD 2014 35 UE Low Voltage Directive EMC 2014 30 UE Electromagnetic Compatibility The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001 Mr U Ferretti Mr F Comencini ...

Page 3: ...0 kcal m3 Maximum gas pressure 150 mbar Electrical supply Three phase 220V 10 10 60Hz without neutral 380V 10 10 60Hz with neutral Motor 10A 230V 5 8A 400V Ignition transformer Primary 1 8A 220V Secondary 1 x 8 kV 30 mA Absorbed electrical power 4 1 kW Quantity Burner accessories 1 Flange 1 Gasket 8 Screws 1 Flange gasket 1 Servomotor controlling air and gas 2 Adjustment cam 3 Power controller for...

Page 4: ...BUSTION CHAMBER PRESSURE MAXIMUM OUTPUT in compliance with DIN 4788 Min output 400 kW 344 000 kcal h Boiler front plate drilling Length available with special blast tube to be separately required Burner 230 230 230 M12 D1785 D2201 D2202 ...

Page 5: ...ssary a gas pressure of 12 mbar and the combustion head set as indicated at page 8 If the combustion chamber is pressurized at 2 mbar the pressure detected at the test point 9 is 12 2 14 mbar If this value is too high for very low gas pipework pressures the gas gear 6 page 8 could be more open Do not decrease the pressure at the coupling under the values shown in the diagram Output the maximum val...

Page 6: ...s 7 and 3 fix the blast tube to the boiler front plate 5 using the gasket 6 provided Insert the burner on the holding bars 4 and fasten the screws 7 and 3 The combustion head adjustment should be carried out as follows Loosen the screws 2 unhook the tension rod of the air damper 1 remove the connecting lead of the servomotor withdraw the group A from the group B After the setting re assemble and v...

Page 7: ... out y the factory Key to layout CMV Motor contactor LFL Control box MB Burner terminal strip MV Fan motor PA Air pressure switch RT Thermal cut out SM Servomotor SO Ionisation probe SP Plug socket TA Ignition transformer TB Burner ground 20152071 ...

Page 8: ...ns this type of burner must be stopped every 24 hours of operation by means of an hours counter to be connected in series with the adjustment devices Key to layout BP Pressure probe BT Temperature probe MB Burner terminal strip PC Check pressure switch PG Min gas pressure switch RWF50 Power controller TR High low mode load remote control sys tem controls operating stages 1 and 2 TL Load limit remo...

Page 9: ...r controller modulating version 8 Pre sheared holes Further prospective signals or controls can be connected to the burner wiring terminal board by removing the metal weldnuts from the pre sheared holes and inserting a commun fair lead for the passage and the clamping of the leads NOTES Do not exchange the neutral wire with the phase avoid the plug pin connection Carry out a safe earth connection ...

Page 10: ...erating increase the adjustment pressure by turning slowly clockwise the knob till reaching the burner lock out Thereafter turn the knob anticlockwise for 1 mbar and repeat the burner start up for checking the regularity if lock out intervenes turn the knob an ticlockwise for 0 5 mbar CAUTION do not turn the ionization probe maintain the drawing position should it be close to the ignition electrod...

Page 11: ...oin cident with the desired set point on the plate 4 Tighten the screws 1 Gas setting Loosen the screw 5 move the ring 6 so that the point er 7 is coincident with the desired set point 8 Tighten the screw 5 Attention the set point number is the same for air and gas setting and is given by the following diagram Example the burner is installed on a boiler of 500 kW assuming an efficiency of 90 the b...

Page 12: ...t controls the min stroke and remains always positioned on 0 in this way when the burner is off the air damper is totally closed Orange cam it controls the minimal modulating pow er It is set by the factory on 30 normal ly this position is the most suitable for the first ignition Thereafter the installer may vary this set ting accordingly with the installation re quirements 6 Cam with adjustable p...

Page 13: ...ofile 7 of the cam by gradually acting on the screws 9 MINIMAL OUTPUT SETTING Gas Disjoin the cam with adjustable profile 6 by means of the button 5 Turn manually anticlockwise the cam till to reach the position of 30 Lock it again and measure the gas rate If a different minimal output is desired set free the cam with adjustable profile and turn it anticlockwise for a higher output turn it clockwi...

Page 14: ...this ratio be in higher range 50 100 in this case further to position the tension rod on 60 it shall be shortened Proceed as follows Disjoint the articulation from the control sector Screw down the tension rod on the extension Reassemble the articulation on the control sector In this way the gas throttle valve servomotor at 0 is partially open The shortening of the tension rod shall permit the gas...

Page 15: ... The minimum current necessary for the control box operation is 6 µA The burner normally supplies a higher current value so that no check is needed However if a measurement of the ionization current is required it is necessary to disconnect the probe lead and insert a d c microamperometer MOTOR LOCK OUT This is caused by the terminal protector relay in case of overloading or by the lacking of the ...

Page 16: ...he burner to perform safely the commissioning For this purpose after checking that the connections have been carried out in accordance with the burner s electrical diagrams an ignition cycle with closed gas ball valve dry test must be performed 1 The manual ball gas valve must be closed 2 The electrical contacts of the burner limit switch need to be closed 3 Ensures closed the contact of the low g...

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Page 20: ...Subject to modifications RIELLO S p A I 37045 Legnago VR Tel 39 0442 630111 http www riello it http www riello com ...