Riello RS 28/M Installation, Use And Maintenance Instructions
Forced draught gas burners low-high-low or modulating operation
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Summary of Contents for Riello RS 28/M
- Page 1 Installation, use and maintenance instructions Forced draught gas burners Low-High-Low or Modulating Operation CODE MODEL 3781070 RS 28/M 3781270 - 3781470 - 3781475 RS 38/M 3781670 - 3781675 - 3781676 RS 50/M 2915760 (9) - 12/2013...
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Page 3: Table Of Contents
CONTENTS WARNING If you smell gas: TECHNICAL DATA ........page 3 Burner models . -
Page 4: Technical Data
= Standard length L1 = Length obtainable with the kit COD. 3010256 L = 8 ” L1 = 13 “ • RS 28/M 1 / 2 13 / 16 COD. 3010257 L = 8 1 / 2 ” L1 = 13 ”... -
Page 5: Burner Description
24 Burner terminal strip D7641 25 Air damper 26 Bracket for mounting the PID modulating controller RWF40 (optional) inch 27 Protection (for RS 50/M single-phase burner) RS 28/M 31 / 32 “ 24 13 / 16 “ 19 11 / 16 “... -
Page 6: Firing Rates
During operation, burner output varies between: • MAXIMUM OUTPUT, selected within area A, • MINIMUM OUTPUT, which must not be lower than the minimum limit in the diagram. RS 28/M = 198 MBtu/hr 58 kW RS 38/M = 266 MBtu/hr... -
Page 7: Gas Pressure
1A or B of the table for the burner in question. RS 38/M - Read off the corresponding output on the left. p (“ WC) Example - RS 28/M: • Maximum output operation MBtu/hr • Natural gas • Gas ring 2)(B)p.8 adjusted as indicated in diagram (C)p.8. -
Page 8: Installation
INSTALLATION BURNER MOUNTING (A) inch Drill the combustion chamber mounting plate as shown in (A). RS 28/M “ “ 9 / 32 13 / 16 3 / 8 The position of the threaded holes can be marked using RS 38/M 9 / 32 “... -
Page 9: Combustion Head Adjustment
In this case the pressure load loss of the combustion below, the gas ring 2)(B) is adjusted to zero. heads is given by column 1B page 6. RS 28/M 198 - 280 MBtu/hr 58 - 82 kW Once you have finished setting up the head, refit the... -
Page 10: 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 11: 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 12: 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 13: 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 14: 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 15: Burner Operation
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 16: 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 17: Appendix A - Spare Parts
Appendix - Spare parts Appendix - Spare parts 2915760... - Page 18 INTERIOR TUBE 3003859 • • • INTERIOR TUBE 3003861 • • • INTERIOR TUBE 3012081 • GAS HEAD - RS 28/M 3012082 • • • GAS HEAD - RS 38/M 3012083 • • • GAS HEAD - RS 50/M 3012997 •...
- Page 19 Appendix - Spare parts CODE DESCRIPTION 3013001 • • • • • • • U BOLT 3013002 • • • • • • • U BOLT 3007166 • • • • • • • SEAL 3003863 • • • • •...
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Page 20: Appendix B - Burner Firing Rates According To Air Density
Appendix - Burner firing rates according to air density Appendix - Burner firing rates according to air density The FIRING RATE area values have been obtained considering a 5 -Multiply H2 by F to obtain the maximum reduced pressure H3 of surrounding temperature of 68°F (20°C), and an atmospheric pres- the firing rate. -
Page 21: Appendix C - Burner Start Up Report
Appendix - Burner start up report Appendix - Burner start up report Model number: Serial number: Project name: Start-up date: Installing contractor: Phone number: GAS OPERATION : Low Fire Gas Supply Pressure: High Fire : Low Fire Main Power Supply: High Fire Control Power Supply: CO: Low Fire... - Page 24 RIELLO S.p.A. I-37045 Legnago (VR) Tel.: +39.0442.630111 http:// www.riello.it http:// www.rielloburners.com RIELLO BURNERS NORTH AMERICA 35 Pond Park Road 1-800-4-RIELLO 2165 Meadowpine Blvd Hingham, Massachusetts, 1-800-474-3556 Mississauga, Ontario U.S.A. 02043 Canada L5N 6H6 http://www.riello-burners.com Subject to modifications...