Then you could turn on the low speed with the switch or the timer.
How to wire attic fan timer.
Attic fan switch and timer.
Use wire nuts to connect.
Attic fan thermostat switch this image has been resized bar to.
Insert the end of the 12 2 wire into the fans junction box.
Attic fan switch and timer.
Each package will have directions on what is required which wire goes where.
Then you could parallel connect the connections for hot l1 and low speed to the timer black and red timer wires respectively.
Adjust the toggle switch for the light and the shaft for the timer accordingly to make them line up with the switch cover.
Attach the black wire to the top brass screw on the switch.
Connect the copper wires together.
Diagram for wiring 2 speed switch timer for attic fan.
Turn on the power and test your work.
Z7pt3 electrical would this the correct way to timer switch whole.
Speed whole house fan switch wiring diagram timer master flow attic.
Connect the black and white fan wires to the black and white switch wires.
At the switch connect the white wires together.
A how to demonstration of wiring your xxfirestat or power attic vent thermostat.
Manual transfer switch wiring diagram.
Strip away about 6 inches of outer insulation and 1 2 inch of individual insulation from the end of each wire.
The attic fan wiring is now complete.
Place the switch cover and test.
Depending on your timer you may either have to use wire nuts back stab side stab or attach it via side screws.
You would need to run an additional neutral wire to the switch box so the timer would have a neutral connection.
Install wire to the fan from the switch box.
Then screw on the switch cover and attach the timer plate and knob.