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FAQ’s

Gas

Nu-way Enertech cannot accept any responsibility for any costs incurred of any description, or any damage caused to person, product or property, whilst using the GUIDELINES listed below.

These instructions given below are on the assumption the burner has previously been commissioned successfully.

These guidelines are only for use by suitable qualified, competent persons with appropriate test equipment and industry knowledge.

The basics should be checked first:

  • Are the gas cocks of the installation open?
  • Are the fuses in order and current switched on?
  • Are the controls (room thermostat, boiler thermostat etc.) correctly adjusted?
  • Is the gas replay of the burner ready for start and not locked out?
  • Is the air supply to the burner sufficient?

Burner fails to start

CauseRemedy
No gasCheck that all gas cocks are open
No voltageCheck fuses, thermostats and electrical connections
The burner motor fails to startThe thermal protection has locked out. Motor defective.
The gas relay is defectiveReplace

Burner motor is running but no ignition after the pre-purge time has elapsed

CauseRemedy
No voltage on the terminalsCheck the contact. Replace faulty reply.
The ignition electrodes in contact with each other or with earthAdjust
The porcelain of the electrodes is brokenReplace the electrodes
The connector has a bad contactImprove the contact
The ignition cables are damagedReplace
The ignition transformer is damaged, no voltage on the secondary sideReplace the transformer
The ignition cable and the ionisation cable have been transposedchange

No flame establishment despite a trouble free start

CauseRemedy
The gas solenoid is defectiveReplace
The gas solenoid valve does not open despite its obtaining voltageReplace coil or the whole valve if necessary
No voltage to the solenoid valveCheck the contact
No electrical connection through the air pressure switchTest the adjustment and the function of the air pressure switch
The starting load is not correctly adjustedReduce or increase the gas supply, reduce the quantity of air
Gas relay is defectiveReplace
Air pressure switch incorrectly adjusted or defectiveCheck the adjustment and readjust
No response as the cams of the servomotor are not correctly adjusted or out of position.

The burner locks out after the safety time has elapsed in spite of flame establishment

CauseRemedy
No ionisation current or the UV-cell in wrong positionAdjust the ionisation electrode and the UV cell examine cables and connections
The supervision part of the gas relay is defectiveReplace the relay
Voltage lower than 185VContact the electricity authorities
The ignition electrodes are disturbing the ionisation currentAdjust the ignition electrodes, repole the ignition transformer if necessary
Bad earthingArrange for proper earthing
Phase and neutral transposedSee wiring diagram and change

The burner locks out during pre-purge

CauseRemedy
The air switch is defective or incorrectly adjusted
The starting load is not correctly adjustedReduce or increase the gas supply. Reduce the quantity of air.
The gas pressure is too lowIncrease the pressure. Contact the gas supply company if necessary.

Condensation in boiler and chimney

CauseRemedy
The flow gas temperature is too low or the quantity of gas is not sufficientIncrease the flue gas temperature by increasing the gas supply. Insulate the chimney

Pulsations at start

CauseRemedy
The ignition electrodes are wrongly adjustedRe-adjust
The gas pressure is too highCheck and adjust by means of a pressure gauge and a pressure adjustment valve
The flue gas side is blockedCheck the chimney flue

Pulsations during operation

CauseRemedy
The burner is not correctly adjustedRe-adjust
The burner is dirtyClean the burner
Defective chimneyCheck and change the dimensions if necessary

The burner is operating correctly but locking out now and then

CauseRemedy
The ionisation current is too lowCheck. Must be at least 4µA according to the relay manufacturer but should be 8-20µA
The UV cell is in a wrong positionAdjust
Voltage drop at certain timesMust not drop more than 15% of the rated current
Air pressure switch defective or incorrectly adjustedContact the electricity authorities if necessary
Spark over in ignition electrodesReplace the electrodes
The ambient temperature of the gas relay is too highHeat insulate, max. 60°C
The ignition spark is too weakCheck the transformer

Bad combustion

CauseRemedy
Bad draught conditionsCheck the chimney
The flue gas temperature is too highThe boiler is overloaded. Reduce the quantity of gas
The CO² content is too lowCheck the boiler with regard to leaks. Choke the draught if it too high.

The CO² content is too high

CauseRemedy
Excess air when using natural gas and gasoil (propane and butane)Choke the air
Air shortageCheck the air supply. Check the flue gas damper
The holes in the gas nozzle are cloggedClean
The fresh air intake is too smallCheck and enlarge
The flame is not burning straight because the burner head is out of positionCheck the burner head and readjust

Oil

Nu-way Enertech cannot accept any responsibility for any costs incurred of any description, or any damage caused to person, product or property, whilst using the GUIDELINES listed below.The information given below is on the assumption the burner has previously been commissioned successfully. These guidelines are only for use by suitably qualified, competent persons with appropriate test equipment and industry knowledge.

The basics should be checked first:

  • Are all the oil valves open?
  • Are the fuses in order and the current switched on, polarity correct etc?
  • Are the external controls calling?
  • Is the air supply and flue clear and sized/positioned correctly?

Burner fails to start. Burner locks out, despite flame establishment

CauseRemedy
Flame instability – incorrect head settings– Check nozzle to burner head dimensions and electrode position
– Low oil pressures – check oil pressure
– Excess air – check and adjust air damper
Photo cell not seeing light– check photo cell is clean and unobstructed
Photo cell failed– Confirm by replacement
Control faulty– confirm by replacement

Burner locks out with no flame established

CauseRemedy
False lightCheck photo cell is not seeing ambient light
Check HT leads, spark electrodes condition and position (not arcing other than at electrode gap)
No sparkCheck supply to ignition transformer from control box
Replace transformer or control box if necessary
Check leads, electrodes condition and position
No oilCheck oil supply to burner – check pump is no air-locked
No oil at nozzleCheck of operation of magnetic valve
Photo cell seeing light or giving false signal.

Burner fails to start after normal operation. Burner locks out - lamp not lit

CauseRemedy
Fuse blownCheck & replace if necessary. Check reason for failure and resolve before reinstating.
Appliance stat has not resetAdjust thermostat
Overheat device has operatedReset overheat device. Find reason for operation & rectify
Control relay or photo cell defectiveCheck by replacement

Motor runs - burner runs to lockout

CauseRemedy
No oil being deliveredCheck tank, oil lines, fire valve, pump pressure and nozzle condition
Excessive flue draughtRectify
No sparkCheck ignition transformer, electrode gap and ceramics

Delayed ignition, burner starts violently. Burner pulsates on start-up - only with hot flue

CauseRemedy
Excessive draughtRe-commission burner

Burner pulsates on start-up

CauseRemedy
Nozzle partly blockedReplace nozzle
Oil pressure too lowCheck and re-commission
Flue blocked or damagedCheck and rectify
Fan slipping on shaftCheck and retighten
Pump coupling loose or wornCheck and replace

Burner starts violently (delayed ignition)

CauseRemedy
Poor sparkCheck transformer voltage input
Replace transformer
check electrode adjustment and condition
check HT leads for damage and disconnection

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