[RE-wrenches] 24V Zephyr Vent Fan from a Magnum MS4024PAE inverter

[Baxter, Gary]

Hi Chris,
All the aux relays are voltage controlled so not sure what setting you would use to activate the fan? I would assume you are trying to turn the fan on based on high temperature in an enclosure or something so battery voltage wouldn’t be a good indicator. We have military and vehicle applications that use +12 or 24v to the fan via an adjustable t-stat. Check Grainger under HVAC t-stats, this one is around $25


Gary

[Adjustable Fan Switch,90-130]<http://www.grainger.com/product/Adjustable-Fan-Switch-6UEE1?s_pp=false&picUrl=//static.grainger.com/rp/s/is/image/Grainger/6UEE1_AS01?$smthumb$>
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From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mac Lewis
Sent: Wednesday, January 07, 2015 2:26 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] 24V Zephyr Vent Fan from a Magnum MS4024PAE inverter

Hi Chris,

If you have a Magnum router in this system, you do have access to an aux contact otherwise you'll need an external relay.

Good luck

On Wed, Jan 7, 2015 at 1:56 PM, Ray Walters <ray at solarray.com<mailto:ray at solarray.com>> wrote:
The Magnums do not have relays available like the old SWs, but you can run a Zephyr directly from either a Outback FM controller or a Midnite Classic.  Both have a controlled 200 mA, 12 output.  I've had occasional trouble running the Zephyr because as weird as this sounds: the fan can have a start up surge that exceeds 200 mA.  Its like sizing a water pump for mice.....you still have to look at the locked rotor current and surge current.  With the Midnite Classic, it will just shut off the 12 v output if it exceeds 200 mA, and it doesn't seem to have an error message or warning.
You could also use a Simple Switch, or other voltage controlled switching device (C40, Tristar,  Solar Converters, etc)


R.Ray Walters

CTO, Solarray, Inc

Nabcep Certified PV Installer,

Licensed Master Electrician

Solar Design Engineer

303 505-8760<tel:303%20505-8760>
On 1/7/2015 8:45 AM, Chris Daum wrote:
Dear folks:

Has anyone hooked up a battery vent fan, being turned on and off using just a Magnum MS4024PAE inverter?  Is there some AUX output that can be used?

Thanks as always for your help!

Chris Daum
Oasis Montana Inc.
406-777-4309<tel:406-777-4309>
www.oasismontana.com<http://www.oasismontana.com>




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Mac Lewis

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