Manual override switch for a fan

mark_flemingNovember 19, 2009

I'm putting an energy recovery ventilation (ERV) system in my new construction. I already put one in the shop/garage that uses a 120V timer set to come on several times a day. In the house, I was thinking about putting in a manual override on the timer.

Here's my thoughts on how to wire it using a double box with the timer on one side and the switch on the other. I feed the box with power and pigtail the hot to the timer and to the switch. The hot coming out of the timer and the switch are then reconnected. The neutral just goes on through the box to the ERV. Ground as necessary. It would only require a single 12/2 wire up to the ERV in the attic.

So, if the timer comes on, power is sent to the ERV. If the switch is on, power is sent to the ERV regardless of the timer. When the switch is off, the timer goes back to running the ERV. Seems right to me, but this configuration isn't in my electrical wiring for dummies book.

Mark

Thank you for reporting this comment. Undo
randy427

"The hot coming out of the timer and the switch are then reconnected." -- I'd pigtail leads from the load side of the timer and switch to the hot lead to the fan.

    Bookmark   November 19, 2009 at 5:58PM
Thank you for reporting this comment. Undo
joed

Your will work as you plan.

    Bookmark   November 20, 2009 at 8:24AM
Sign Up to comment
More Discussions
Please Critique Low-Volt (Home Automation) Plan/Proposal
GW/Houzz Community, As always, I want to thank this...
Andrew K.
Motion sensor that doesn't click
I have a motion sensor very much like the picture attached...
drmeow3
Insulation in electrical box
While in my attic the other day I saw an open electrical...
sgilliatt
Too much load for circuit?
I have 200 amp service to the main panel (which has...
zver11
Replacing fan speed dial back to standard toggle?
I am removing a ceiling fan and replacing it with a...
onkyokoi
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™