WNS Series horizontal Oil-fired (Gas) Boiler
-11-
8
Magnetic valve act; see whether
there is leakage
1
After stop running boiler to watch
whether remains fire inside furnace.
9
The time set point of all
sequence
1
Purging time, safely ignition time etc.
10
The fire lighting status
1
Observe the spark strength or take out oil
injector to stop oil injection for check
11
Whether
there
is
carbon
deposition for burner
1
Include oil injector and flame cover
12
Burning status
1
Observe the color of exhaust smoke
13
Whether there is shedding of
refractory
1
Continue with item 11 at the same time
14
Running status of all auxiliary
machine and motor
Whether there is oil leakage of oil pump,
whether the feeding water pressure is in
normal condition (frequently check)
15
Analysis & treatment of boiler
water
The times can be confirmed according to
requirements; operation method can refer
to the relevant manual.
16
Wrap and clean the photo
resistance & glass of observer
2
The install location should be correct,
remove the dirt and carbon deposit, can
continue with item 11 at the same time.
17
Wipe and clean the electrode
for lighting fire
1
By means of abrasive paper.
18
Clean all relay, contactor &
contact of regulator
1 By means of abrasive paper.
19
Clean the overflow valve
2
After disassembling then clean it with
light diesel oil
20
Clean oil filter
1
According to oil quality and experience.
Note: Letter
“
H
”
means hour; Letter
“
D
”
means day; Letter
“
W
”
means week;
Letter
“
M
”
means month; Letter
“
S
”
means season; Letter
“
Y
”
means year;
⑦
Blow down of boiler
In generally the feeding water contains mineral matter, when the water enters into boiler
and after being vaporized the mineral matter will be deposited. So in order to avoid destroy
boiler because of scale and slag, should keep the quality of boiler water. When the boiler water
quality is over qualified valve of the standard, should make blowing down. The blowing down
can be continued periodically according to actual condition, in generally, one time every shift is
sufficient.
7.1 If two or over two boilers use one same blowing down main pipe and all branch tubes have
no non-return valve (if add non-return valve should pay attention to the discharging direction),
should be very careful for blowing down. It is not permitted that two boiler continue blowing
down at the same time.
7.2 The blowing down should be conducted at the status of low load and high water level. At
the same time should much care for boiler water level. It will be suitable to decrease water
level for about 25
～
50mm every time.
7.3 If the blowing down tube end is not connected to the inside space of blown down tank or
well, also no any protection equipment, at this time, in order to avoid happening any accident,
must confirm no any person close to blowing down tube end then can continue this work.
Ⅶ、
Maintenance of boiler
①
In order to lengthen boiler using life time, every 3 to 6 month, should stop running for
overall check and overhauling.
1.1 Stop running boiler method
After boiler stop burning and when the boiler water temperature is lower than 50
℃，
then
