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Onan JB Prefab Enclosure Options


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  #11  
Old 06-25-2017, 02:53:08 PM
gtj811 gtj811 is offline
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Default Re: Onan JB Prefab enclosure Options

Thanks to BRae from Michigan, I was able to pick up his spare enclosure last fall. I am finally now in the process of preparing the outside pad. I have a brick house with the gas meter outside. How far from the structure and gas meter should I plan the generator enclosure pad with the JB? Is 3 feet enough space? Hate to clear the area and then be told it is too close to the gas meter or house. Anyone have advice? Better to ask now! Thanks all.

Gregg from Wisconsin.
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Old 06-25-2017, 03:33:06 PM
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Default Re: Onan JB Prefab enclosure Options

Gregg, best to find a JB installation page, usually in the JB operators manuals. Leon N might have some of the specifics. I have a factory enclosed JB and it is right next to my gas meter. Now as to venting the air flow to and out of the set, My engine cooling air discharge points away from the house. The fan housing, my set is NOT a vacuflow, is unobstructed.
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Old 06-25-2017, 04:27:57 PM
gtj811 gtj811 is offline
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Default Re: Onan JB Prefab enclosure Options

Thanks. I will await Leon's expert opinion as my JB is a Magniciter and not a Vacuflow either.
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Old 06-25-2017, 05:19:43 PM
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Default Re: Onan JB Prefab enclosure Options

Here is the installation instructions. Cut out more then needed
Attached Files
File Type: pdf Pages from JB Operators Spec AA 2-77 967-0123 .pdf (620.1 KB, 38 views)
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Old 06-25-2017, 05:27:12 PM
gtj811 gtj811 is offline
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Default Re: Onan JB Prefab enclosure Options

Thanks for the details! Lots of good info but nothing about the distance from the meter. A google search came up with a 3 foot clearance so I can make this work.
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Old 06-25-2017, 05:55:43 PM
YellowLister YellowLister is offline
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Default Re: Onan JB Prefab enclosure Options

Sometimes you can find free sheds on cl.. or for very cheap
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Old 06-25-2017, 07:10:45 PM
dalmatiangirl61 dalmatiangirl61 is offline
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Default Re: Onan JB Prefab enclosure Options

If this installation needs to be inspected, you might want to talk to the inspector, I have no idea what the codes call for.
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Old 06-25-2017, 07:43:21 PM
Leon N. Leon N. is offline
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Default Re: Onan JB Prefab enclosure Options

Gregg you should get your hands on a copy of the Magneciter equipped JB Owners 'annual and Parts List, Onan document 967-320 and the Onan tech briefs on Installation Information For Onan Electric Generator Plants, T-014 & T-029. These document s were written back in the 1960's and provide valuable information that was current in that day.and age. I followed the Onan recommendations back in 1970 and my Magneciter equipped JB has been operating very reliably since 1970. Make sure you comply with local codes about locating your standby plant close to the house or the gas meter.

One big improvement or change was the advent of synthetic lubricating oil. For many years now I have been using 5W20 full synthetic all year round with no need to to make seasonal viscosity changes anymore. My JB is exposed to below zero temperatures as well as 90+ temps in the Summer. Just make sure every start runs long enough to drive out the moisture.

You have one fine machine, the likes of which wil never be reproduced again.
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Old 06-25-2017, 08:12:47 PM
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Default Re: Onan JB Prefab enclosure Options

Sent off T-029 and T-014 to Doug to have him add to twinslan.
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Old 06-27-2017, 08:10:08 PM
Ray Lynch Ray Lynch is offline
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Default Re: Onan JB Prefab enclosure Options

NFPA Standard 37 has good info about generator installs. It is often adopted as part of the governing code for municipalities and their AHJ. You can check your local code to see if it applies.
You can view it online at this link.
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http://www.nfpa.org/codes-and-standa...ds/free-access
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