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Summary of Contents for Riello RS 68/M LN
- Page 1 Installation, use and maintenance instructions Gas Burners RS 68/M LN - RS 120/M LN Low-High-Low or Modulating Operation C6505072 - 2915848 (5) - 06/2011...
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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
TECHNICAL DATA Model RS 68/M LN RS 120/M LN Output MAX. MBtu/hr 1327 - 3258 2272 - 4924 389 - 955 666 - 1443 MIN. MBtu/hr 1136 Fuel Natural gas - Max. delivery SCFH 3258 4924 - Pressure at max. delivery “WC... -
Page 4: Burner Models
Fan motor IE2/EPACT Three phase burner Model RS 68/M LN RS 120/M LN Control circuit power supply V/Ph/Hz 120/1/60 Main electrical supply (+/- 10%) V/Ph/Hz 208-230/3/60 Fan motor 3500 3500 W - HP 2200 - 3 2200 - 3 208-230... -
Page 5: Burner Description
8)(A). PACKAGING - WEIGHT (B) - Approximate measure- inch A (1) ments • The burners are shipped skid mounted RS 68/M LN 27 / 32 “ - 52 5 / 32 “ 1 / 8 “... -
Page 6: Firing Rates
= 23.6 inch; length 6.6 ft D2793 COMMERCIAL BOILERS (C) - IMPORTANT The RS 68/M LN - RS 120/M LN burners are suitable for operation on either flame-inversion boilers* or boilers with combustion chambers featuring flow from the base (three... -
Page 7: Gas Pressure
GAS PRESSURE RS 68/M LN The adjacent diagrams show minimum pressure losses along the gas supply line depending on the maximum burner output operation with natural gas. Column 1 Gas manifold pressure measured at test point 1)(B), with: • Combustion chamber at 0 “WC •... -
Page 8: Installation
INSTALLATION BOILER PLATE (A) inch Drill the combustion chamber mounting plate as shown in (A). The position of the threaded holes can be marked RS 68/M LN 11 /16 “ 13 /16 “ - 12 25 /32 “ 1/2 W using the burner head gasket supplied with the burner. -
Page 9: Combustion Head Adjustment
Continuing with the previous example, page 8 indicates Maximum burner output that for burner RS 68/M LN with output of 1894 MBtu/hr a D2797 pressure of approximately 2” is necessary at test point 6)(A). If this pressure cannot be reached, open the ring 2)(B) to notch 4 or 5. -
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 gas train can enter the burner from the right or left side, depending on which is the most convenient, see fig. -
Page 11: Adjustments Before First Firing
ADJUSTMENTS BEFORE FIRST FIRING LOW GAS PRESSURE SWITCH HIGH GAS PRESSURE SWITCH AIR PRESSURE SWITCH Adjustment of the combustion head, and air and gas deliveries has been illustrated on page 9. In addition, the following adjustments must also be made: Open manual valves up-stream from the gas train. -
Page 12: Servomotor
SERVOMOTOR The servomotor gives simultaneous regulation of the air damper through the variable cam profile 4)(F) and the gas butterfly valve. It rotates by 130° in approx. 35 s. The factory settings must not be changed for the first fir- ing, just check that they comply with the details below. -
Page 13: Burner Starting
BURNER STARTING Close the control circuit, with the switch in fig. C) in the Position jumpers Trim potentiometers AUTO position. On firing (pilot burner and main valve) turn the switch (C) to MAN and the switch 1)(E) in the AUT position. MAXIMUM OUTPUT Slide switch Using button (B), "increase output"... -
Page 14: Air Pressure Switch
AIR PRESSURE SWITCH (A) 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: 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 16: Procedure To Refer Burner Operating Condition In High Altitude Plants
PROCEDURE TO REFER BURNER OPERATING CONDITION IN HIGH ALTITUDE PLANTS Find the corrected burner capacity for the plant’s altitude in chart 1 and the corrected pressure in chart 2. Check in the firing rate graph of the burner (page 6), if the working point defined by the values above is within the range limits. If not, higher burner size is needed. -
Page 17: Siemens Lfl Control Sequence Of Operations
BURNER OPERATION LFL 1.335 Series 01 BURNER STARTING • Load control close. Full Modulation Fan motor starts. • Servomotor starts: 130° rotation to right, until contact is made on cam 1)(A) page 13. The air damper is positioned to MAX. output. •... -
Page 18: Siemens Lfl Control Troubleshooting Guide
BURNER FAULTS LFL 1.335 Series 01 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. -
Page 19: Motor Connection
Motor connection at 208-230 or 460V WARNING: the motors, manufactured for 208-230/460 IE2/Epact voltage, have a different connection than IE1 motors, no more star/delta but star/double star. Please, pay attention to the indications in case of modification of voltage, maintenance, or substitution. IE2/Epact S8380 S8379... -
Page 20: Factory Wiring Diagram -Burner Mounted Lfl
Factory Wiring Diagram RS 68/M LN - RS 120/M LN with burner mounted Siemens LFL control D2332 Field Wiring Diagram RS 68/M LN - RS 120/M LN with burner mounted Siemens LFL control D11641... -
Page 21: Calibration Of The Thermal Relay
To reset, in the case of an intervention of the thermal relay, press the button 1) of (A). D8267 Fuse and threephase cable calibration IE 1 RS 68/M LN RS 120/M LN 208 - 230 V 460 V 575 V... -
Page 22: Factory Wiring Diagram - Remote Panel
(see page 4). • The RS 68/M LN - RS 120/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 control box to check its own efficiency at start-up. Burner halts are normally provided for automatically by the boiler load control system. - Page 23 Factory Wiring Diagram RS 68/M LN - RS 120/M LN with auxiliary control panel Layout (A)
- Page 24 LAYOUT (A) page 23 Burner RS 68/M LN - RS 120/M LN The flame safeguard is in an auxiliary panel. See the internal electrical systems of the auxiliary panel in order to have the complete wiring diagram. Key to layout...
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Page 25: Spare Parts List
SPARE PARTS LIST... - Page 26 N. CODE DESCRIPTION DESCRIZIONE Burner serial number Matricola bruciatore • • • • • • • 3003948 AIR DAMPER ASSEMBLY GRUPPO SERRANDA • • • • • • • 3003949 GRID PROTEZIONE • • • • • • • 3003952 SOUND DAMPING FONOASSORBENTE •...
- Page 27 N. CODE DESCRIPTION DESCRIZIONE Burner serial number Matricola bruciatore • • • • • • • 3012013 PERNO • • • • • • • 3003481 SCREW VITE • • • • • • • 3003891 CONNECTOR RACCORDO • • • • • • • C5332011 3012969 GAS PRESSURE SWITCH...
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