Change delay time VM154

I’m using application 1, dip 1 on and dip 2 off as " turn-on delay only"
The delay time is now factory set to 2 minutes and 40 seconds.
How can I change this delay time to 2 minutes or less?

Sorry, this delay is factory set and cannot be changed.

can I get a schematic diagram of the VM154?

The delay is determined in the firmware of the microcontroller, so a hardware modification will not affect the delay.
Sorry, for copyright reasons, we do not release the firmware.
Hereby a link to the diagram (please allow 1h for server update):
http://www.velleman.eu/images/tmp/VM154%20schematic.jpg