Hi Smart Daniel, welcome to the forum,
I can assure you atomisers are not sent with a burnt taste, however they do contain an unflavoured PG priming liquid to prevent corrosion in transport/storage., Before use it is best to blow this primer liquid out by taking the atomiser without the tank cartridge and blowing through the battery end whilst holding a paper towel in the tank end to collect the primer liquid.
You then fill your tank cartridge with your favourite flavour insert the tank back into the atomiser making sure it is fully inserted as far as it will go, there should be no gaps between the tank cartridge and atomiser. Before attaching this unit back on to the battery, block the hole at the threaded battery end and take a couple of draws on the mouthpiece to re-prime the atomiser with your new flavour, after this you can reattach the atomiser and tank to your battery and begin to vape.
How to control the amount of liquid that is delivered to the atomising coil when you are vaping depends on how lightly or strongly you take your draws on the mouthpiece and the length of time you take your draw for.
If you draw too strongly or quickly you are likely to flood the atomiser with more liquid than the atomiser can vaporise, if you draw too lightly then there will be insufficient liquid reaching the atomiser and the heating coil will scorch and taste harsh or burnt.
You should find a nice steady draw of 5 to 8 seconds long will deliver the correct amount of liquid to the atomiser and the heating coil will have enough time to atomise this liquid.
If you experience a dry harsh burning taste then you need to take a couple of draws without pressing the power button on the battery, this will draw more liquid into the atomiser. if you have automatic batteries then you need to remove the battery and blocking the hole at the battery thread take a couple of draws to pull some liquid down to the heating coil, like at the beginning when you first primed the atomiser.
If you experience a leak or you hear a gurgling sound as you vape and the vapour production becomes weak, then you are drawing too hard and flooding the system. If this happens you will need to blow out the atomiser in the same way as removing the factory primer as explained above.
When you remove the tank cartridge from the atomiser, you will notice it is wet with liquid, this is not a leak, but condensation formed by the heat of the atomised liquid meeting with the cold outer body of the atomiser, you need to wipe this off from time to time, if you don't do this then the condensed liquid can be drawn through the air slots and eventually into the mouthpiece tip. It is best policy to clear this when you refill the tank by holding the tank in some paper towel and blowing out any built up condensation inside the mouthpiece.
I hope this helps you understand how the Titan and Tornado Tanks work