Article reference KA-01155
Most of the Xpelair timer fans require a permanent Live and Neutral from an isolation switch, as well as a Switched Live to the T terminal. It is recommended that your installer refers to the individual instructions for the specific product for guidance. Below is an example of how a basic timer fan should be wired.

NOTE: It is recommended to run a separate wire to the T terminal in order to reduce the chance of induced/phantom voltage.
Applicable models
DX100TS, DX100TR, DX100HTS, DX100HTR, DX100BTS, DX100BTR, DX100BHTS, DX100BHTR, C4TS, C4TR, C4HTS, C4HTR, C4HTSR, C4PSR, CV4SR