(1) The pressure switch contact is not connected to the running position (the air pressure is too low)
(2) The blower is polluted and the hot relay moves.
(3) The gas burner motor rotates in the wrong direction.
(1) Adjust the pressure switch correctly and replace it if necessary.
(2) Cleaning equipment
(3) Pole change of power supply
(1) the control circuit is interrupted
(2) Gas transmission is interrupted.
(3) Control failure
(4) Contactor does not act.
(5) Thermal relay is damaged.
(1) Find the disconnection point, contact or disconnect the regulator or monitor.
(2) Open the ball valve, and notify the gas management organization when the gas quantity is insufficient for a long time.
(3) Repair and replacement of dis-function parts.
(4) Manual reset inspection
(5) Replace the thermal relay
a. The oil transfer pump does not supply oil
b. There is no oil in the oil tank
c. The fuel pipeline is blocked
d. There is air in the pump
e. The solenoid valve is burnt out or does not work
f. The motor rotation direction is incorrect
g. There’s water in the oil pump
h. Leakage of oil suction pipe
a. The ambient temperature is low
b. There are many burning processes whileflame is small
c. High hydrogen intensityin fuel gas
d. The chimney is too long
e. The exhaust temperature is low
a. Keep the chimney heat
b. Reset the set value of temperature control
c. Reduce air distribution
d. Reduce the chimney height
e. Increase the furnace temperature
The burner can't jet flame, which can be roughly divided into the following three situations:
(a) Arc without ignition
(b) The electromagnetic valve cannot output fuel gas
(c) The output fuel gas cannot be ignited due to incorrect adjustment or abnormal ignition arc.
(a) The control box may be faulty (damaged)
(b) The air pressure switch does not act, the air pressure switch is damaged, and the contact of the gas burner cannot act when the air pressure reaches the set value. The air pressure port or piezometer is blocked. Check whether the set value of the air pressure switch is set correctly, and the fan failure causes the air pressure to be too low.
(a) It may be a voltage problem. Because the programmer has a low voltage protection function, the burner stops running when the input voltage is below 160 V (whichever the normal input voltage is 220-240 V). Later, when the voltage returns to normal, the burner starts again by itself.
(b) It may also be due to the insufficient supply pressure of the gas. When the burner starts to emit the flame, the pressure drops sharply, and the burner stops running when falling below the set point on the gas low-pressure switch. When the burner is stopped, the gas pressure rises, and when it rises above the set value on the low gas voltage switch, the burner restarts by itself. The reason for the sharp drop in gas may be the small caliber of the gas supply pipeline. If the fuel is LPG but supplied by the cylinder, note the number of cylinders connected. If the change of gas pressure is quite large, be particularly careful when adjusting the pressure on the gas low pressure switch.
(c) Please check whether the pressure adjusted on the gas low-pressure switch is incorrect.
The damper air volume setting of the big flame is too high.
The microswitch of the oil valve of the big flame (the group outside the damper) is set inappropriately (the setting is higher than the air volume of the damper of the big flame).
Oil viscosity is too high to be atomized (heavy oil).
Improper spacing between cyclone disc and oil nozzle.
The big flame oil nozzle is worn or dirty.
The heating temperature of the reserve tank is too high, which causes the steam to make the oil pumping not smooth.
The oil in the oil-fired boiler contains water.
Gradually reduce the flame; raise the heating temperature; adjust the distance (between 0 and 10 mm); clean or replace; set the temperature at about 50℃. change oil or drain water.
Five possible solutions: clearing, replacing, adjusting distance, changing cables or change transformers.
The working process of the flame detection device is as follows: the flame detection device near the ignition oil gun is composed of optical fiber, which senses the fire and generates optical signal. The optical signal is transmitted to the signal amplification circuit of the ignition program-controlled cabinet, which is amplified into electrical signal, and the switch value is transmitted to the display screen of the distributed control system (DCS), so that the operator can know the working condition of the ignition oil gun.
The boiler boosting process is actually a warming process, the pressure corresponds to the saturation temperature. The saturation temperature is not directly proportional to the pressure, but with the increase of the pressure, the saturation temperature starts to increase rapidly, then becomes slower and slower. Therefore, in order to ensure that the temperature difference between the upper and lower walls of the steam drum is within the specified range, the boosting speed must be slow at the initial stage of ignition. In addition, in order to avoid the superheater burning out at the initial stage of ignition, this is also the case.
In the middle and late ignition period, the boosting speed is faster and faster, but the heating speed is basically unchanged, so the boosting speed can be accelerated, the boosting time can be shortened, and the fuel can be saved.
(1) Adequate air supply.
(2) Maintain a high enough temperature.
(3) Proper mixing of air and fuel.
(4) Sufficient burning time.