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WNS Series horizontal Oil-fired (Gas) Boiler

 

 

 

-11- 

Magnetic valve act; see whether 

there is leakage 

 

 

 

 

 

After  stop  running  boiler  to  watch 

whether remains fire inside furnace. 

The  time  set  point  of  all 
sequence 

 

 

 

 

 

Purging time, safely ignition time etc. 

10 

The fire lighting status 

 

 

 

 

 

Observe the spark strength or take out oil 

injector to stop oil injection for check 

11 

Whether 

there 

is 

carbon 

deposition for burner 

 

 

 

 

 

Include oil injector and flame cover 

12 

Burning status 

 

 

 

 

 

Observe the color of exhaust smoke 

13 

Whether  there  is  shedding  of 
refractory 

 

 

 

 

 

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 

 

 

 

 

 

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 

 

 

 

 

 

By means of abrasive paper. 

18 

Clean  all  relay,  contactor  & 
contact of regulator 

 

 

 

 

 

1  By means of abrasive paper. 

19 

Clean the overflow valve 

 

 

 

 

 

After  disassembling  then  clean  it  with 
light diesel oil 

20 

Clean oil filter 

 

 

 

 

 

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; 

  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 

  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 

Summary of Contents for WNS Series

Page 1: ...l Gas fired Oil Boiler ZhangjiagangWilfordThermalTechnology Co Ltd Please read this manual carefully before using this machin Only qualified workers can operate this machine If the operation method is...

Page 2: ...ler structure 5 Boiler work principle 7 Operation Manual of Gas Fired Boiler 7 Operation requirements 7 Maintenance of boiler 11 Inspection hydraulic testing for pressure parts 12 Attention for users...

Page 3: ...appendix list product quality certificate one copy Installation description Preparation work before installation Check the completeness of the boiler accessories according to the packing list and the...

Page 4: ...drawings Water pump is connected with water tank if user has additional requirements can provide spare water pump 4 2 Safety valve must be assembled after hydraulic testing and connected to the tube f...

Page 5: ...r boiler water level indication and for the supervision by boiler operator The water level controller is used for transmitting the value of boiler water level The control system will control the runni...

Page 6: ...ecause of some reasons the photo resistance has no sense of light stop burning and send out acoustical light alarm continue post purging for gas fired boiler then stop running boiler Check and find ou...

Page 7: ...ill feed water into the boiler so as to keep it in the normal water level The above mentioned process continues steam will continuously produced by heating the water by absorbing the afterheat of firi...

Page 8: ...iler again according to above mentioned way Running boiler 3 1 Start and running boiler normally 3 1 1 Open the air vent valve on the top of boiler or lift the valve core of safety valve 3 1 2 Start b...

Page 9: ...warming tube should be according to the length diameter of pipeline steam temperature and so on In generally it should not less than ten minutes After the tube is heated open the main steam valve slow...

Page 10: ...it quality 6 9 The photoresistance should be removed for examination testing every three month measure the values of resistance of bright dark Photoresistance type MG41 100A Rated power capacity 100M...

Page 11: ...etter W means week Letter M means month Letter S means season Letter Y means year Blow down of boiler In generally the feeding water contains mineral matter when the water enters into boiler and after...

Page 12: ...nance if less than one month should use wet maintenance 4 1 Dry maintenance Stop running boiler drain off all boiler water remove all dirt inside boiler and clean it bake it by faint fire close all ha...

Page 13: ...ter dropping to working pressure During inspection the pressure should kept no change If find any leakage should well make record for later repairing when the pressure drop to atmosphere After hydraul...

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