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@positiveenergysolar.com_ <mailto:al...@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.chamber...@redwoodalliance.org>
*To:* re-wrenches@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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