Riello RS 28/M Installation, Use And Maintenance Instructions
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 Gas Burners RS 28/M - 38/M - 50/M Low-High-Low or Modulating Operation C6505055 - 2915760 (0)
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Page 2: Table Of Contents
CONTENTS WARNING If you smell gas: TECHNICAL DATA ......page 3 Burner models . -
Page 3: Technical Data
L1 = Length obtainable with the kit COD. 3010256 L = 8 1 / 2 ” L1 = 13 13 / 16 “ • RS 28/M COD. 3010257 L = 8 1 / 2 ” L1 = 13 13 / 16 ”... -
Page 4: Burner Description
Two types of burner failure may occur: • FLAME SAFEGUARD LOCK-OUT: inch if the flame relay 22)(A) pushbutton lights up, it indi- cates that the burner is in lock-out. RS 28/M 31 / 32 “ 24 13 / 16 “ 19 11 / 16 “... -
Page 5: 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 6: Gas Pressure
- Find the nearest pressure value to your result in col- umn 1A or B of the table for the burner in question. MBtu/hr - Read off the corresponding output on the left. Example - RS 28/M: • Maximum output operation 1.02 1.02 0.079... -
Page 7: 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 8: 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 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: Factory Wiring Diagram - Burner Mounted Lfl
ELECTRICAL SYSTEM as set up by the manufacturer - Fan motor - Air pressure switch LAYOUT (A) - Thermal overload Burner RS 28/M - RS 38/M (single-phase) - Switch for following operations: MAN = manual LAYOUT (B) AUT = automatic Burners RS 38/M - RS 50/M (three-phase) •... -
Page 16: Field Wiring Diagram - Burner Mounted Lfl
Use flexible cables according to local Regulations. RS 28/M - RS 38/M Single-phase with burner mounted Siemens LFL control LAYOUT (A) - The RS 28/M - RS 38/M models electrical connection single-phase power supply LAYOUT (B) - The RS 38/M - 50/M models electrical connection three-phase power supply Fuses layout (A) - (B), see table (C). -
Page 17: Factory Wiring - Remote Panel
Factor Wiring Diagram RS 28/M - RS 38/M single-phase with Remote Panel D2396 Factory Wiring Diagram RS 38/M - RS 50/M three-phase with remote panel D2403 Key to Layouts (A) - (B) ELECTRICAL SYSTEM - Capacitor ELECTRICAL SYSTEM as set up by the manufacturer... -
Page 18: Appendix - 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 19: Siemens Lfl Control Sequence Of Operations
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 20: Siemens Lfl Control Troubleshooting Guide
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 21: 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... - Page 22 Represented By: Power Equipment Company 2011 Williamsburg Road Richmond, VA 23231 Ph: 804-236-3800 Fx: 804-236-3882 www.peconet.com...
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