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Summary of Contents for Riello Burners RS 45/M LN
- Page 1 Installation, use and maintenance instructions Gas Burners RS 45/M LN Low-High-Low or Modulating Operation C6505071 - 2915847 (2)
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Page 2: Table Of Contents
WARNING CONTENTS If you smell gas: TECHNICAL DATA .......page 3 Burner models . -
Page 3: Technical Data
TECHNICAL DATA MODEL RS 45/M LN Output MAX. MBtu/hr 717 - 2037 (1969 210 - 597 (577 MIN. MBtu/hr Fuel Natural gas - Max delivery SCFH 2037 - Pressure at maximum delivery natural gas “ WC 5.31 Operation Low - high-low or modulating... -
Page 4: Burner Description
27 Pilot burner attachment Note If the flame relay 22)(A) pushbutton lights up, it indicates that the burner is in lock-out. inch To reset, press the pushbutton. RS 45/M LN 31 / 32 “ 24 13 / 16 “ 19 11 / 16 “... -
Page 5: Firing Rates
Diameter (inches) COMMERCIAL BOILERS (C) - IMPORTANT The RS 45/M LN burner is suitable for operation on either flame-inversion boilers or boilers with combustion cham- bers featuring flow from the base (three flue passes) on which the best results are obtained in terms of low NOx emissions. -
Page 6: Gas Pressure
- Find the nearest pressure value to your result in col- umn 1 of the table (A). - Read off the corresponding output on the left. Example - RS 45/M LN: • Maximum output operation • Natural gas • Gas ring 2)(B)p.8 adjusted as indicated in diagram (C)p.8. -
Page 7: Installation
INSTALLATION BURNER MOUNTING (A) Drill the combustion chamber mounting plate as shown inch in (A). The position of the threaded holes can be marked using RS 45/M LN 9 / 32 “ 13 / 16 “ 3 / 8 the head gasket supplied with the burner. -
Page 8: Combustion Head Adjustment
COMBUSTION HEAD ADJUSTMENT Installation operations are now at the stage where the blast tube and sleeve are secured to the boiler as shown in fig. (A). It is now a very simple matter to set up the combustion head, as this depends solely on the output developed by the burner at maximum power. -
Page 9: Gas Piping
GAS PIPING • The main gas train must be connected to the gas attachment 1)(A), using flange 2), gasket 3) and screws 4) supplied with the burner. • The main gas train can enter the burner from the right or left side, depending on which is the most conven- ient, see fig.(A). -
Page 10: Adjustments Before First Firing
ADJUSTMENTS BEFORE FIRST FIRING LOW GAS PRESSURE SWITCH AIR PRESSURE SWITCH Adjustment of the combustion head, and air and gas deliveries has been illustrated on page 8. In addition, the following adjustments must also be made: - Open manual valves on the gas train. - Adjust the low gas pressure switch to the start of the scale (A). -
Page 11: Burner Calibration
BURNER CALIBRATION The optimum calibration of the burner requires an analy- sis of the flue gases at the boiler outlet. Adjust successively: 1 - First firing output 2 - Max. burner output 3 - Min. burner output 4 - Intermediate outputs between low and high fire 5 - Air pressure switch D791 6 - Minimum gas pressure switch... -
Page 12: Minimum Output
Adjusting air delivery Progressively adjust the end profile of cam 4)(A) by turn- ing the cam adjustment screws as they appear through the access opening 6)(A). - Turn the screws clockwise to increase air delivery. - Turn the screws counter-clockwise to reduce air deliv- ery. -
Page 13: Air Pressure Switch
5 - AIR PRESSURE SWITCH (A) - CO CHECK AIR PRESSURE SWITCH Adjust the air pressure switch after having performed all other burner adjustments with the air pressure switch set to the start of the scale (A). With the burner operating at min. output, increase adjust- ment pressure by slowly turning the relative dial clock- wise until the burner locks out. -
Page 14: Maintenance
MAINTENANCE FLAME INSPECTION WINDOW Combustion The optimum calibration of the burner requires an analy- sis of the flue gases. Significant differences with respect to the previous measurements indicate the points where more care should be exercised during maintenance. Gas leaks Make sure that there are no gas leaks on the pipework between the gas meter and the burner. -
Page 15: Appendix
Field Wiring Connections • The RS 45/M LN burners have been type- approved for intermittent operation. This means they should compulsorily be stopped at least once every 24 hours to enable the flame safeguard to check its own efficiency at start-up. Burner halts are normally provided for auto- matically by the boiler load control system. -
Page 19: Burner Firing Rates According To Air Density
APPENDIX - Burner firing rates according to air density CORRECTION FACTOR average barom. above sea level Air temperature pressure °F (°C) “ W.C. mbar 0 (0°C) 41 (5°C) 50 (10°C) 59 (15°C) 68 (20°C) 77 (25°C) 86 (30°C) 104 (40°F) 1013 1,087 1,068... - Page 20 BURNER OPERATION Full Modulation BURNER STARTING • Operating closes. Fan motor starts. • Servomotor starts: 90° rotation to right, until contact is made on red cam. The air damper is positioned to MAX. output. • Pre-purge stage with air delivery at MAX. output. •...
- Page 21 BURNER FAULTS Control program under fault In case of any disturbance, the sequence mechanism stops and with it the lock-out indicator. The symbol above the reading mark of the indicator gives the type of disturbance: conditions and lock-out indication No start, e.g. because one contact is not closed. Lock-out during or after control program sequence due to extraneous light (e.g.
- Page 22 Key to Layouts - Pressure probe - Tree-wire probe Pt100 - Temperature probe with two-wire circuit + BB - Components on board burners + BQ - Components on board main panel + BC - Components on board boller DISC1 - Disconnect switch motor DISC2 - Disconnect switch auxiliary - Motor fuse...
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Page 23: Start Up Report
BURNER START UP REPORT Model number: Serial number: Project name: Start-up date: Installing contractor: Phone number: GAS OPERATION Gas Supply Pressure: : Low Fire High Fire Main Power Supply: : Low Fire High Fire Control Power Supply: CO: Low Fire High Fire Burner Firing Rate: : Low Fire...
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