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Summary of Contents for Riello 525 T80
- Page 1 Installation, use and maintenance instructions Forced draught gas burner Two stage operation CODE MODEL TYPE 3752582 GAS 7/2 525 T80 2915869 (5) - 07/2015...
- Page 2 The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001. Legnago, 21.05.2015 Executive General Manager Research & Development Director RIELLO S.p.A. - Burner Department RIELLO S.p.A. - Burner Department Mr. U. Ferretti Mr. F. Comencini...
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Page 3: Technical Data
TECHNICAL DATA Thermal power stage 800 ÷ 1760 kW - 688.000 ÷ 1.513.600 kcal/h Operation Two stages, high and low flame Fuel Natural gas Pci 8 - 10 kWh/m = 7000 - 8600 kcal/m For maximum output 14,5 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: Overall Dimensions
OVERALL DIMENSIONS * Length available with special blast tube to be separately required. FIXING TO THE BOILER Separate the combustion head from the burner body by loosening the screws 1) and 2) and with drawing the group A) from the holding bars 3). -
Page 5: Gas Supply
MINIMUM GAS PRESSURE - OUTPUT PRESSURE: detected at the pressure test-point 7) (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 pres- surization value. Example: to obtain 1250 kW it is necessary a gas pressure of 12 mbar and the combustion head set as indi- cated at page 9. - Page 6 BURNER ELECTRICAL WIRING (carried out by the factory) 20107484 CMV Fan motor contactor A 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...
- Page 7 ELECTRICAL CONNECTIONS TO THE WIRING TERMINAL BLOCK (to be carried out by the installer) 220V 380V D2662 F Ampere S mm Remote lock-out signal Safety control device system Remote lock-out signal of leak detection Gas safety shut off valve control device Burner terminal strip Leak detection control device Minimum gas pressure switch...
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Page 8: Burner Start-Up Cycle
FIXING OF THE ELECTRICAL WIRES All the electrical wires, which are to be connected to the terminal block 4) (fig. 1) shall pass through the fair leads 3) (fig. 1) as per this scheme . 1 - Three phase supply: fair lead Pg 21 2 - Single phase supply: fair lead Pg 13.5... -
Page 9: Combustion Head Adjustment
PROBE - IGNITION ELECTRODE POSITION Ignition electrode position Probe position CAUTION Do not turn the ionization probe, maintain the drawing position; should it be close to the ignition electrode, damage may occur to the control box amplifier. COMBUSTION HEAD ADJUSTMENT Two separate adjustments have to be made: air and gas. -
Page 10: Operational Diagram
ADJUSTMENT OF THE AIR DAMPER MOTOR STOP - Blue lever Black lever This lever leaves the factory vertically positioned and corre- sponds to the complete closing of the air damper. A partial opening of the air damper might be obtained by mo- Red lever ving leftwards this lever (+ on the label). - Page 11 COMBUSTION CHECKS It is advisable to not exceed 10% of CO (gas with calorific value of 8600 kcal/m3), in order to avoid the risk that small changes of the adjustments due, for instance, at draught variation, may cause combustion 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.riello.com Subject to modifications...
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