Frequently Asked Questions

GENERAL

QUESTION:
Are your gas valves pre-set?
ANSWER:
No, all gas valves are provided in the closed position so there is no tension on internal springs. All gas valves should require to be pre-set for adjusting for first firing.

QUESTION:
Are your burners 'Plug & Play'?
ANSWER:
No, all our burners require setting up by an engineer to suit the invidivual boiler it is attached to. Even if the correct size oil nozzle is fitted the burner will still require to be adjusted for the correct emmissions setting.

QUESTION:
Why does my Mectron or R40 series burner motor run, but the burner does not fire or lock-out?
ANSWER:
There are four potential electrical causes of this issue:
1. To check photocell, remove (disconnect) from control box. Re-fit control box and fire up burner. If it fires after 12 secs and then locks out after 5 secs, the photocell is faulty.
2. Check resistance of the solenoid coil; blue and brown wires (1.47 kohms) and blue and black wires (1.4 Ohms) readings should be within 10% of these figures. If faulty then replace coil.
3. Check voltage on white wire to terminal 7 of 530 SE control box. This should be 50V AC +/- 3 volts. If no voltage present, change burner motor.
4. As a last resort, change the control box 530SE.


QUESTION:
Which burners are available for single phase electrical supply?
ANSWER:
All oil and gas burners up to and including R40 series and RS and RL 34 are 1 (single) phase only.
RL and RS 44 are available in 1 phase or 3 phase electrical supply (required phase must be specified.)
RL and RS 50 and above are only available for 3 phase electrical supply.


QUESTION:
Which burners are available for single stage operation? (On/Off)
ANSWER:
All oil and gas burners up to and including G20/ GS20. Plus RL34.1, RS34.1.

 

QUESTION:
Which burners are available for 2 Stage operation? (Hi/Lo)
ANSWER:
R40 G10I, R40 G20D, RL34 and above.
R40 GS10D, R40 GS20D, RS34 and above.


QUESTION:
Which burners are available for full modulation?
ANSWER:
Oil: RL28M, RL38M, RL50M, RL70M, RL100M, RL130M and P/G range.
Gas: RS34M, RS44M, RS50M, RS70M, RS100M, RS130M and P/M range.


QUESTION:
Are the RLS burners suitable for modulating?
ANSWER:
Standard burners are only suitable for Hi/Lo operation on the oil side and fully modulating on the gas - but not fully modulating on both fuels. Newer 'Electronic Cam' burners may be fully modulating on both fuels. Please enquire for further details.


QUESTION:
What duel fuel burners are available for full modulation?
ANSWER:
The 1400, 2000, 3000 and 4500 GI/EMME range and newer 'electronic cam' models.


QUESTION:
Can we supply Acoustic Shrouds for Riello burners?
ANSWER:
Yes, these are available for most of the larger burners, type and price can be obtained from our Sales Department.

QUESTION:
I have 230volt coming into the burner plug but nothing else is happening?
ANSWER:
If a seven pin plug is fitted then check terminals T1 and T2 for 230 volts. If power at T1 but no power at T2 then there is a boiler thermostat issue.
 

OIL PUMPS

QUESTION
With the new 20031996 pump, there is no connection for the hydraulic ram pipe, is this correct?
ANSWER
The connection is now in the new position directly below the nozzle delivery port. The connection size is the same diameter as the old corner tapping. Click here for details.

QUESTION
My RL burner has been installed with a single pipe with the by-pass screw still in place. Will this effect the pump seals?
ANSWER
Yes, it will cause the pump seals to leak. The RL series can be piped 2 pipe with both flexible oil lines fitted to a tee piece downstream of the filter and a single pipe from the oil tank.
If the pump is converted to single pipe with only one flexible oil line fitted the bypas screw MUST be removed.

QUESTION
What pump pressures are recommended for Gas Oil (35Sec) and kerosine (28Sec)?
ANSWER
For gas oil, 12 Bar minimum is recommended. For kerosine, a maximum of 10 Bar is recommended.

QUESTION
What is the maximum tank supply oil pressure to the R40 fuel pump range?
ANSWER
Supply pressure should not exceed 0.5 Bar (7PSI).

QUESTION
Having replaced my 3007450 pump with the replacement 3007811 pump, where do I fit the by-pass screw?
ANSWER
In the return port.

QUESTION
What is the current replacement pump for the R40 G series oil burner?
ANSWER
The current replacement pump for the R40 G series (single stage) burner is the 20031996. This has replaced the 3020476 and the previous 3007811.

ELECTRICAL

QUESTION
What is the voltage on the oil valve coil & why 3 wires?
ANSWER
29 V DC at ignition, Switching to 3 Volts during run. The coil has two tappings; the first to use the full coil potential to CLOSE the valve, then reduced voltage to hold it there. 
(Note: The RDB burner coil has only 2 wires, the coil winding voltage from control box gives 30 V DC and 3 V DC on run).

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QUESTION
Having replaced the Mectron R40 series motor 3007350 being replaced by code 3007971, does the capacitor also need to be changed?
ANSWER
If the above part is changed for the new product code, then the capacitor should also be changed for 4µF; part number 3005798.

FUEL

QUESTION
What is the suitability of Riello range for 28 or 35 sec oil?
ANSWER
R40 Series one stage up to G20KI= 28 & 35 Sec Oil
RDB Series = 28 & 35 Sec Oil
G20, G20S, R40 Two stage = 35 Sec Oil

QUESTION
What nozzles are recommended for the RL range burner?
ANSWER
Danfoss or Delevan solid spray 45º angle for boilers with long combustion chambers & reverse flame, 60º Solid for other boiler applications.

CONTROL BOX

QUESTION
What replaces the 506 SE gas control box?
ANSWER
This was replaced with the 509 SE GB; code 3003383.
NOTE: Unfortunately, Siemens are no longer producing these control boxes. As the affected burners are likely to be pre 1996 CE certification (20 or more years old!) Riello would recommend the complete replacement of the burner including the obsolescent control box to bring them in line with current standards.

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QUESTION
What replaces the 505 SE gas control box?
ANSWER
This was replaced with the 508 SE/GB; code 3001146, and required a wiring modification which can be downloaded below.
NB: This is not recommended for GAS H, GAS 1 or GAS 2
NOTE: Unfortunately, Siemens are no longer producing these control boxes. As the affected burners are likely to be pre 1996 CE certification (20 or more years old!) Riello would recommend the complete replacement of the burner including the obsolescent control box to bring them in line with current standards.
505 SE to 508 SE/GB Conversion Instructions

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QUESTION
What replaces the 502 SE oil control box?
ANSWER
This has been replaced with the RMO 503 SE; code 3001150, and requires a wiring modification which can be downloaded below.
502 SE to 503 SE Conversion Instructions

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QUESTION
What replaces the 483 SE oil control box?
ANSWER
This has been replaced with the 530 SE; code 3001156.
All these control boxes excluding the 483, require alterations to control box base wiring.

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QUESTION
To which burner would you fit the low voltage 525SE control box?
ANSWER
Only the R40 GS3, GS5, FS3 and FS5.

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QUESTION
What replaces the 508 SE gas control box?
ANSWER
This is replaced by the RMG 508 SE control box; code 3001138. A direct plug in replacement, no wiring modifications required.
RMG 508 SE Data Sheet

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QUESTION
What replaces the 508 SE GB gas control box?
ANSWER
This was replaced by RMG 508 SE GB control box; code 3001146. A direct plug in replacement, no wiring modifications required.
NOTE:Unfortunately, Siemens are no longer producing these control boxes. As the affected burners are likely to be pre 1996 CE certification (20 or more years old!) Riello would recommend the complete replacement of the burner including the obsolescent control box to bring them in line with current standards.
RMG 508 SE/GB Data Sheet

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QUESTION
What replaces the 509 SE gas control box?
ANSWER
This is replaced by the RMG 509 SE control box; code 3001139. A direct plug in replacement, no wiring modifications required.

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QUESTION
What replaces the 509 SE GB gas control box?
ANSWER
This was replaced by RMG 509 SE GB control box; code 3003383. A direct plug in replacement, no wiring modifications required.
NOTE:Unfortunately, Siemens are no longer producing these control boxes. As the affected burners are likely to be pre 1996 CE certification (20 or more years old!) Riello would recommend the complete replacement of the burner including the obsolescent control box to bring them in line with current standards.

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QUESTION
Are the LMG22 and RMG/M control boxes interchagable
ANSWER
These control boxes are NOT interchangable.
The RMG/M control box was introduced on the RS/M BLU range or burners in February 2007.
The LMG22 control box is still availble as a spare part:
- LMG22 Control Box - 3002478
- RMG/M Control Box - 3013362
For more information please read RIY 07-001 below
RIY 07 - 001 (PDF)

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QUESTION
What replaces the RMG 509 SE GB gas control box (and RMG508SE/GB control box?)
ANSWER
Siemens are no longer producing these control boxes. As the affected burners are likely to be pre 1996 CE certification (20 or more years old!) Riello would recommend the complete replacement of the burner including the obsolescent control box to bring them in line with current standards.

RDB OIL BURNER

QUESTION
The fan motor runs but the burner does not go to ignition?
ANSWER
There are four possible electrical causes to this issue: (tests only for competant engineers.)
1. Photocell, faulty (or seeing light.) To test disconnect the photocell from the control box. Attempt a start sequence. If the burner lights (after 12 secs) and goes out, change photocell.
2. Solenoid coil. Test resistance readings for 100 Ohms (+/- 10%.) If out of limits, change coil.
3. Fan Motor.Test voltage coming from white wire to control box (50 volts +/- 3v) Note; black wire neutral, blue wire live 230v. If voltage out of limits change fan motor.
4. Control box. If the above three items are satisfactory then consider the control box may be at fault (no tests are available for the control box.)
See fault finding chart (below) for more details.

QUESTION
What is the current replacement pump for the RDB oil burner?
ANSWER
The current RDB oil pump is code 20030953. This has replaced the 3020475 and the previous 3008654.

QUESTION
Is there a fault finding chart available for the RDB oil burner?
ANSWER
Yes, please see the link below for an easy to follow fault finding chart
Click here to see fault finding chart

QUESTION
Do I have to take into account the ambient air temperature when commissioning an RDB burner?
ANSWER
Yes, outside / ambient air temperature should be considered when setting up an oil burner.
In conformity with Efficiency Directive 92/42/EEC the application of the burner on the boiler, adjustment and testing must be carried out observing the instruction manual of the boiler, including verification of the CO and CO2 concentration in the flue gases, their temperatures and the average temperature of the water in the boiler.
Combustion air is drawn in from outside, meaning there may be notable changes in temperature, which can affect the percentage of CO2. You are advised to adjust CO2 in accordance with the graph featured. Click here for graph.
For example if you set the burner up with an ambient temperature of -10ºC and the CO2 at 10.8% - with an ambient temperature of +20ºC the CO2 could rise to 12%.