Instructions for setting 28457

See this sticky thread at the top of this forum.
https://www.askmehelpdesk.com/electr...ls-616475.html

Here is link to Westinghouse manuals:
Woods-timers-and-manuals
Index of /pdf

The 28457 is dawn-dusk timer... but product numbers and designs change rapidly... copy following link and check if that matches your timer:
http://waterheatertimer.org/pdf/West...imerManual.pdf