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

Cause	Remedy
No gas	Check that all gas cocks are open
No voltage	Check fuses, thermostats and electrical connections
The burner motor fails to start	The thermal protection has locked out. Motor defective.
The gas relay is defective	Replace

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

Cause	Remedy
No voltage on the terminals	Check the contact. Replace faulty reply.
The ignition electrodes in contact with each other or with earth	Adjust
The porcelain of the electrodes is broken	Replace the electrodes
The connector has a bad contact	Improve the contact
The ignition cables are damaged	Replace
The ignition transformer is damaged, no voltage on the secondary side	Replace the transformer
The ignition cable and the ionisation cable have been transposed	change

No flame establishment despite a trouble free start

Cause	Remedy
The gas solenoid is defective	Replace
The gas solenoid valve does not open despite its obtaining voltage	Replace coil or the whole valve if necessary
No voltage to the solenoid valve	Check the contact
No electrical connection through the air pressure switch	Test the adjustment and the function of the air pressure switch
The starting load is not correctly adjusted	Reduce or increase the gas supply, reduce the quantity of air
Gas relay is defective	Replace
Air pressure switch incorrectly adjusted or defective	Check 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

Cause	Remedy
No ionisation current or the UV-cell in wrong position	Adjust the ionisation electrode and the UV cell examine cables and connections
The supervision part of the gas relay is defective	Replace the relay
Voltage lower than 185V	Contact the electricity authorities
The ignition electrodes are disturbing the ionisation current	Adjust the ignition electrodes, repole the ignition transformer if necessary
Bad earthing	Arrange for proper earthing
Phase and neutral transposed	See wiring diagram and change

The burner locks out during pre-purge

Cause	Remedy
The air switch is defective or incorrectly adjusted
The starting load is not correctly adjusted	Reduce or increase the gas supply. Reduce the quantity of air.
The gas pressure is too low	Increase the pressure. Contact the gas supply company if necessary.

Condensation in boiler and chimney

Cause	Remedy
The flow gas temperature is too low or the quantity of gas is not sufficient	Increase the flue gas temperature by increasing the gas supply. Insulate the chimney

Pulsations at start

Cause	Remedy
The ignition electrodes are wrongly adjusted	Re-adjust
The gas pressure is too high	Check and adjust by means of a pressure gauge and a pressure adjustment valve
The flue gas side is blocked	Check the chimney flue

Pulsations during operation

Cause	Remedy
The burner is not correctly adjusted	Re-adjust
The burner is dirty	Clean the burner
Defective chimney	Check and change the dimensions if necessary

The burner is operating correctly but locking out now and then

Cause	Remedy
The ionisation current is too low	Check. Must be at least 4µA according to the relay manufacturer but should be 8-20µA
The UV cell is in a wrong position	Adjust
Voltage drop at certain times	Must not drop more than 15% of the rated current
Air pressure switch defective or incorrectly adjusted	Contact the electricity authorities if necessary
Spark over in ignition electrodes	Replace the electrodes
The ambient temperature of the gas relay is too high	Heat insulate, max. 60°C
The ignition spark is too weak	Check the transformer

Bad combustion

Cause	Remedy
Bad draught conditions	Check the chimney
The flue gas temperature is too high	The boiler is overloaded. Reduce the quantity of gas
The CO² content is too low	Check the boiler with regard to leaks. Choke the draught if it too high.

The CO² content is too high

Cause	Remedy
Excess air when using natural gas and gasoil (propane and butane)	Choke the air
Air shortage	Check the air supply. Check the flue gas damper
The holes in the gas nozzle are clogged	Clean
The fresh air intake is too small	Check and enlarge
The flame is not burning straight because the burner head is out of position	Check 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

Cause	Remedy
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

Cause	Remedy
False light	Check photo cell is not seeing ambient light
	Check HT leads, spark electrodes condition and position (not arcing other than at electrode gap)
No spark	Check supply to ignition transformer from control box
	Replace transformer or control box if necessary
	Check leads, electrodes condition and position
No oil	Check oil supply to burner – check pump is no air-locked
No oil at nozzle	Check 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

Cause	Remedy
Fuse blown	Check & replace if necessary. Check reason for failure and resolve before reinstating.
Appliance stat has not reset	Adjust thermostat
Overheat device has operated	Reset overheat device. Find reason for operation & rectify
Control relay or photo cell defective	Check by replacement

Motor runs - burner runs to lockout

Cause	Remedy
No oil being delivered	Check tank, oil lines, fire valve, pump pressure and nozzle condition
Excessive flue draught	Rectify
No spark	Check ignition transformer, electrode gap and ceramics

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

Cause	Remedy
Excessive draught	Re-commission burner

Burner pulsates on start-up

Cause	Remedy
Nozzle partly blocked	Replace nozzle
Oil pressure too low	Check and re-commission
Flue blocked or damaged	Check and rectify
Fan slipping on shaft	Check and retighten
Pump coupling loose or worn	Check and replace

Burner starts violently (delayed ignition)

Cause	Remedy
Poor spark	Check transformer voltage input
	Replace transformer
	check electrode adjustment and condition
	check HT leads for damage and disconnection

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