[RE-wrenches] battery venting

[Ray Walters]

I, 2nd Allan's recommendation, or better, use sealed batteries, since 
its battery backup, and so small.  People are bad about battery 
maintenance on anything but off grid.  You definitely can't afford to 
have hydrogen sulfide going up through the building.

Ray Walters

On 12/31/2011 8:12 AM, Allan Sindelar wrote:
> Jeff,
> I would use a Power Vent by Zephyr Industries. In addition to a 12V or 
> 48V fan, his units have a built-in backdraft damper. Negative building 
> pressure under certain conditions would be a concern of mine, so I 
> wouldn't rely on angle to ensure exhaust always travels up and out.
> Allan
>
> *Allan Sindelar*
> _Allan at positiveenergysolar.com_ <mailto:Allan at positiveenergysolar.com>
> NABCEP Certified Photovoltaic Installer
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> *Positive Energy, Inc.*
> 3201 Calle Marie
> Santa Fe, New Mexico 87507
> *505 424-1112*
> _www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/>
>
> *
> *
>
>
>
> On 12/31/2011 7:59 AM, JRQ wrote:
>> Wrenches,
>>
>> I'm looking at a potential battery backup system wtih a 200 AH @48V 
>> flooded battery bank in the basement electrical room of a 3 story 
>> building. There is a window in the electrical room. The batteries 
>> will be located about 10' from an outdoor wall. The building is all 
>> reinforced concrete, so I can not run a vent pipe vertically from the 
>> batteries. Does anyone have a rule of thumb for how much the vent 
>> pipes can be angled from the batteries? Would it be more lenient for 
>> short sections of pipe (say <2') versus one long angled piece from 
>> the batteries? My instinct would be to keep the pipe no more than 45? 
>> from plumb.
>>
>> Or with bending the vent pipe: does anyone have a best-practice rule 
>> for the sum of the angles of bends?
>>
>> Thanks,
>> Jeffrey Quackenbush
>> NABCEP Certified PV Installer
>> Peripatetic Solar Technician
>>
>> ------------------------------------------------------------------------
>> *From:* Drake <drake.chamberlin at redwoodalliance.org>
>> *To:* re-wrenches at lists.re-wrenches.org
>> *Sent:* Saturday, December 31, 2011 8:08 PM
>> *Subject:* [RE-wrenches] Pole Mount PVC
>>
>> Hello Wrenches,
>>
>> With pole mount systems, It looks cleaner and is safer to run the PVC 
>> conduit down the pole into the concrete, and use a 90 degree elbow to 
>> come out through the side of the anchor underground.  This way, the 
>> pipe is protected from mechanical damage, and there is nothing to 
>> trip over when adjusting the array for seasonal tilt.
>>
>> I was told that some building departments will not allow this.  Has 
>> anyone had a problem with using this method, either technical or 
>> legal?   How do you like to route your conduits?
>>
>> Thank you,
>>
>> Drake
>> Drake Chamberlin
>> ATHENS ELECTRIC LLC
>> OH License 44810
>> CO license 3773
>> NABCEP Certified PV
>>
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