This is a video explaining how to change the waste oil timer settings and thermostat.
This is needed to be done when you change types of oil, or oil supplier, depending on the oil, as some oil can be absolute rubbish, some oils have that much water in them you can't use them. So if you find a good oil supplier stick with them.
The timmer has quite a few settings however we use P3 mode which is the dual timer mode.
To get P3 press the first button and hold until P1 comes up press it again ,P2, will show, press it again P3 will show, press the middle button to save P3.
You'll need to watch this a few times to work it out.
When you are altering the timer the pump will want to start, so my advice is either do it when the heater isn't going until you get the hang of it.
If the heater is under the set thermostat temperature the bypass switch can do the same job as turning it off. But if the thermostat has reached it's set temperature the pump will run anyway, so now we have added a second switch on the left hand side of the box to turn the pump off to stop this from happening.