Robertshaw Controls

I try to get an oven that was going Lennox Robertshaw ignition control SP735L, my problem is I can not know what kind of terminal "TR" on this forum is fora I confirmed that this control is defective, but must replace it with a Honeywell universal unity, but I can not identify the function of TR on the old board (SP735L # Lennox 18G9101 )aaaaa

Take a look at the wiring diagram, it should be inside the access panel. I hope this will show what it controls.

or physically trace the wire to see where it goes.

I found this .....

http://www.fixya.com/support/t3363745-am ...

I tried - "TR oven control terminal" in google

I think the TR is the transformer for earth / neutral. W TH R to power the board of the thermostat and TR is neutral. It is located on the new universal module.