So depending on which is energized you get either a high or low.
How to wire high low switch on a attic fan.
Additionally the low speed coil is typically supplied by a red wire while the high speed coil is fed by a black wire.
These louvers are not energized but the aforementioned louvers in the 2nd floor ceiling open via an electrified switch that when energized with electric pulls the louvers open.
At least some fans that use a high low switch use a 3 way switch.
Location of power supply and switch.
The load is then routed to the fan using either the black or red of a 3 wire.
Since you have to choose between the speeds using a two speed motor switch it s impossible for both coils to become energized simultaneously.
Find a live receptacle for the power source.
The line comes from the timer to the common of the three way switch.
In many instances the low and high speed coils share an external wire.
Here are 3 tips to help.
Run a black wire from the low speed post marked on the rocker switch to the marked low speed line on the fan motor and a red wire between the high speed posts on the rocker switch and fan motor.
The attic fan has 2 speeds.
The dedicated cooler wall switch have 5 position that can operate the fan on hi and low and fan with pump on hi and low.
The process of wiring an attic fan involves the power source and switch location wiring connections to the switch and wiring connections to the fan.
There should be 4 wires.
High low common and ground going to the cooler.
Determine the fan switch location.
The louvers in front of the fan located in the attic open by the wind generated by the fan i e.
If you are trying to switch the speed on the roof mount cooler then you should use a cooler wall switch.