Bentone Bentoflex ST 133 K, Installation And Maintenance Instruction

33

Bentone 

8.3  Delayed ignition

Indications

Burner pulsates at 

start with hot flue gases

Burner pulsates at start

Causes

Excessively strong draught

Excessive pressure drop across the brake 

plate

Preheater temperature too low

New oil type

Nozzle partially blocked

Oil pressure too low

Flue is blocked or damaged

The fan wheel is slipping on the shaft

Pump coupling loose or worn

Preheater blocked

Delayed ignition

Excessively strong draught

Excessive pressure drop across the brake 

plate

Preheater temperature too low

New oil type

Remedies

Correct boiler draught

Adjust the burner

Check preheater function

Adjust the preheater's set operating 

temperature

Ensure that the new oil's physical parame-

ters are within the limits for which the 

burner is designed. If not, change the oil.

Replace nozzle

Check and adjust

Check and correct

Check and tighten

Replace

Check the ignition electrode setting, 

(see technical data)

Check that the ignition electrodes 

are not damaged

Check high voltage cables

Check position of 

nozzle assembly setting

Correct boiler draught

Adjust the burner

Check preheater function

Adjust the preheater's set operating 

temperature

Ensure that the new oil's physical parame-

ters are within the limits for which the 

burner is designed. If not, change the oil.

Indications

The burner pump emits noise during start

The burner pump emits noise during 

operation

8.4  Noise in pump

Causes

Insufficient negative pressure on the suction 

side pump

Remedies

Check the oil system in order to reduce 

pressure drop

Rebuild the oil system to form a solution 

with a transport oil pump

Check that the oil used has the physical 

parameters that the burner is rated for. If 

not, change the oil.

Temperature of the oil from the tank is too 

low, increase the temperature of oil from 

tank

Clean the pump filter

8.5  Pump pressure

Indications

The burner pump can not build up pressure

Causes

No oil

Oil viscosity too low

Pump worn

Pump run using impure oil that has worn the 

pump out prematurely

Blocked pump filter

Remedies

Check that there is oil and that it reaches 

the pump

Check that the oil reaching the pump has 

the physical parameters that the pump 

can handle. Change the oil or the pump's 

oil parameters

Replace the pump

Replace pump and install self-cleaning 

filter in the oil system

Check, clean pump filter