hello dears all!
i have some problems with oxygen concentrators:
puritan bennett 492A an devilbiss 505.
is there a specialist or someone can tell me where i can find the service manual ?
because here , in Kabul , i can't have support !
hello Kaushal !
the main problém is with devilbiss 505:
the concentration of O² is 23% , compressor seems good but i do suspect the 3 way valves to be defective because the membrane with holes opposite to the "push side" is hard and dry.
i try to make news ones by punching holes in "push side" membranes i have in spares.
in your opinion , how much is the good presure at the entrance and output of the sieves ?
is it possible that the sieves are clogged ?
Hello Jean:
Most of these machine work with an income pressure of 150psi. Inside the pressure must be regulated to 90psi because excesive pressure may damage the zeolita (sieves. Air had to be filtered and des humidified BEFORE reach concentrator.
A defective valve (no damaged at 100% that is easy to recognize)cause a lost of concentration but no to 23%. I think zeolite is damaged or cloged.
Release all pressure and open the purge nut located in downside of the thank(s), allows system work and see if any liquid (water or oil) flow from thanks. If not close nut again and verify no leaks remain.
check the electro valves carefully. there is a right way to assembly it that is different en each mark. Consult the web with the part number of the valve, probably you will find the data sheet. Sometimes it just need be cleaned.
Do you use a dry air compressor?,
If output pressure is ok, then filters are not clogged, (it may be bad but no clogged)
Let me know if I can help a little more. Sorry I have not technical data for this machine but almost work in the same way
thank you Jose for these usefull informations.
this morning i received a PB 492 with poor O² concentration , and , according to your post , i belive the output pressure of the compressor is too low. so i open the compressor head and , bingo! the seal and sleeves where obviousely very dammaged.
i found inside the machine a maintenance log : last service 1999 , at 15000 hours. now , with 32000 hours and 10 years after , i think it is time to do a big maintenance !!
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bonjour jean
Oxygen concentrators problems
January 09, 2009 03:34
hello dears all!
i have some problems with oxygen concentrators:
puritan bennett 492A an devilbiss 505.
is there a specialist or someone can tell me where i can find the service manual ?
because here , in Kabul , i can't have support !
thanks for reading
jean-michel
to rate and post a comment
Kaushal Patil
Re: Oxygen concentrators problems
January 09, 2009 11:26
Hi,
can you please specify the problems. I am located in Mumbai, India and have worked on concentrators for more than 12 years.
Thanks,
Kaushal Patil
to rate and post a comment
bonjour jean
Re: Oxygen concentrators problems
January 10, 2009 12:27
hello Kaushal !
the main problém is with devilbiss 505:
the concentration of O² is 23% , compressor seems good but i do suspect the 3 way valves to be defective because the membrane with holes opposite to the "push side" is hard and dry.
i try to make news ones by punching holes in "push side" membranes i have in spares.
in your opinion , how much is the good presure at the entrance and output of the sieves ?
is it possible that the sieves are clogged ?
thanks a lot
jean-michel
to rate and post a comment
Jose Morillo
Re: Oxygen concentrators problems
January 12, 2009 10:03
Hello Jean:
Most of these machine work with an income pressure of 150psi. Inside the pressure must be regulated to 90psi because excesive pressure may damage the zeolita (sieves. Air had to be filtered and des humidified BEFORE reach concentrator.
A defective valve (no damaged at 100% that is easy to recognize)cause a lost of concentration but no to 23%. I think zeolite is damaged or cloged.
Release all pressure and open the purge nut located in downside of the thank(s), allows system work and see if any liquid (water or oil) flow from thanks. If not close nut again and verify no leaks remain.
check the electro valves carefully. there is a right way to assembly it that is different en each mark. Consult the web with the part number of the valve, probably you will find the data sheet. Sometimes it just need be cleaned.
Do you use a dry air compressor?,
If output pressure is ok, then filters are not clogged, (it may be bad but no clogged)
Let me know if I can help a little more. Sorry I have not technical data for this machine but almost work in the same way
Jose
to rate and post a comment
bonjour jean
Re: Oxygen concentrators problems
January 12, 2009 01:34
thank you Jose for these usefull informations.
this morning i received a PB 492 with poor O² concentration , and , according to your post , i belive the output pressure of the compressor is too low. so i open the compressor head and , bingo! the seal and sleeves where obviousely very dammaged.
i found inside the machine a maintenance log : last service 1999 , at 15000 hours. now , with 32000 hours and 10 years after , i think it is time to do a big maintenance !!
thanks so much.
jean-michel
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Sara Alkabi
re: Re: Oxygen concentrators problems
March 12, 2021 10:40
I have problem in oxygen concentrator the error message low o2
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Sara Alkabi
re: Re: Oxygen concentrators problems
March 12, 2021 10:40
Can you help me please i have the same device error message low o2
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yuan bo
Re: Oxygen concentrators problems
January 16, 2009 03:34
I can help you ,please contact me. obnauy@163.com
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David D'Angelo
Re: Oxygen concentrators problems
October 28, 2011 10:07
I need a pdf service manual for a DeVilbiss 505DS oxygen concentrator, do you have one, please reply to davidpdangelo@yahoo.com
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