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Summary of Contents for Riello 521T80
- Page 1 Installation, use and maintenance instructions Forced draught gas burner Code Model Type 3752182 GAS 3/2 521T80 2915865 (4) - 05/2012...
- Page 2 DECLARATION Declaration of conformity in accordance with ISO / IEC 17050-1 Manufacturer: RIELLO S.p.A. Address: Via Pilade Riello, 7 37045 Legnago (VR) Product: Forced draught gas burner Model: GAS 3/2 These products are in compliance with the following Technical Standards:...
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Page 3: Technical Data
TECHNICAL DATA Thermal output stage 130 - 340 kW 112.000 - 292.000 kcal/h Operation Two stages, high and low flame Fuel Natural gas Pci 8 - 10 kWh/m = 7000 - 8600 kcal/m For maximum output 11.1 mbar are needed measured at the coupling with Minimum gas pressure nil pressure in the combustion chamber and gas with calorific value of 8600 kcal/m... -
Page 4: Gas Supply
STANDARDS EQUIPMENT Quantity Description Flange Gasket Screws Flange gasket ACCESSORIES • RADIO DISTURBANCE PROTECTION KIT code 3010386 If the burner is installed in places particularly subject to radio disturbance (emission of signals exceeding 10 V/m) owing to the presence of an INVERTER, or in applications where the length of the thermostat connections exceeds 20 metres, a protection kit is available as an interface between the control box and the burner. -
Page 5: Working Range
WORKING RANGE COMBUSTION CHAMBER PRESSURE 2 STAGE OUTPUT (in compliance with DIN 4788) kcal/h D1788 Min. output at 1 stage: 80 kW - 69.000 kcal/h. MINIMUM GAS PRESSURE - OUTPUT Pressure: detected at the pressure test-point 6) (fig. 1) with nil mbar into the combustion chamber. Should the combustion chamber be pressurized, the pressure necessary will be that of the graph plus the pressurization value. - Page 6 BURNER ELECTRICAL WIRING (carried out in the factory) 20052582 Capacitor TTENTION Protection against radio interference Relay In the case of phase-phase feed, a Burner terminal strip bridge must be fitted on the control box Fan motor Air pressure switch terminal board between terminal 6 and RMG Control box the earth terminal.
- Page 7 ELECTRICAL CONNECTIONS TO THE WIRING TERMINAL BLOCK (to be carried out by the installer) Remote lock-out signal MB Burner terminal strip PG Minimum gas pressure swicth TB Burner earth Limit control device system TR High-low mode load control system Safety control device system VS Gas safety shut off valve 1°...
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Page 8: Burner Start-Up Cycle
BURNER START-UP CYCLE Air-purge: loosen the screw placed on the minimal gas pressure switch mounted on the gas train Screw Plug for pressure measure Pressure switch S7506 AIR PRESSURE SWITCH 5) (fig.1) The air pressure switch setting shall be carried out after having S7507 set all other adjustments of the burner and the air pressure switch shall be at its lowest set-point. -
Page 9: Combustion Head Adjustment
COMBUSTION HEAD ADJUSTMENT Two separate adjustments have to be made: air and gas. These adjustments can be carried out when the burner is still open, during the installation (see page 2 - Fixing to the boiler). Air setting Loosen the two screws 1) and move the internal part of the combustion head 2) so that its rear edge 3) is coincident with the desired set-point on the plate 4). -
Page 10: Operational Diagram
ADJUSTMENT OF THE AIR DAMPER MOTOR STOP - Blue lever This lever leaves the factory vertically positioned and corresponds to the complete closing of the air damper. A partial opening of the air damper might be obtained by moving leftwards this lever (+ on the label). The new position of the air damper is detectable when the burner is off. -
Page 11: Combustion Checks
COMBUSTION CHECKS It is advisable to not exceed 10% of CO (gas with calorific value of 8600 kcal/m ), in order to avoid the risk that small changes of the adjustments due, for instance, at draught variation, may cause com- bustion with insufficient air and consequently formation of CO. - Page 12 BURNER STARTING DIFFICULTIES AND THEIR CAUSES Signal Problem Possible cause Recommended remedy 2 blinks Once the pre-purg- 1 - The operation solenoid lets little gas . Increase ing phase and safety through time have passed, 2 - One of the two solenoid valves does Replace the burner goes into not open.
- Page 13 Signal Problem Possible cause Recommended remedy 10 blinks The burner does not 32 - Incorrect electrical wiring..Check switch on, and the lockout appears The burner goes into 33 - Defective control box... . . Replace lockout 34 - Presence of electromagnetic .
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Page 14: Normal Operation / Flame Detection Time
NORMAL OPERATION / FLAME DETECTION TIME The control box has a further function to guarantee the correct burner operation (signal: GREEN LED perma- nently on). To use this function, wait at least ten seconds from the burner ignition and then press the control box button for a minimum of 3 seconds. -
Page 15: Operating Fault Diagnostics
OPERATING FAULT DIAGNOSTICS The control box has a self-diagnostic system, which easily allows identifying the operating faults (RED LED signal). ITo use this function, wait at least ten seconds from the safety lock out, and then press the reset button for a minimum of 3 seconds. - Page 16 RIELLO S.p.A. I-37045 Legnago (VR) Tel.: +39.0442.630111 http:// www.riello.it http:// www.rielloburners.com Subject to modifications...
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