- 6 -
Adjusting
L
Read the air quantity referring to the burner air quantity characteristic table
(burner PQ characteristic table).
M
Calculate the necessary gas quantity, and adjust the gas quantity by using an
orifice flow meter (MO) or other flow meter and manipulating the limiting valve
until the specified excess air ratio is obtained.
N
When the equalizing valve method is used, slowly open the control damper to the
position for the maximum combustion while checking the combustion state, and
check to confirm the flowrates of gas and air.
O
When a safety circuit has been incorporated into the flame detector, also check to
conform the flame current value.
P
After setting the excess air ratio, return the control damper to the position for the
minimum combustion.
Q
When the control motor is used, joint the control damper to the specified position.
Extinguishing
R
Fully close the cock and solenoid valve located immediately before the burner,
and check to confirm that the fire has been extinguished.
※
Stop the combustion blower after the in-furnace temperature lowers to below 500
℃
to protect the nozzle.
6. Inspection (Nozzle, Burner Tiles)
※
Inspection must be made after the furnace has sufficiently been cooled.
In
inspecting, be sure to wear heat insulating gloves and other protective gear.
1
Check to confirm that the combustion blower, as well as the shut-off valve and the
solenoid valves, are in the OFF position.
2
Loosen the union, etc. of the gas pipe.
3
Loosen the hexagon nuts setting the air body
③
and the gas body
④
.