fire door closer

Hi, We are installing a fire door closer in our house, we are unsure how to do this as have never done this before. I feel as though it is the wrong way, it just dosent look right compared to some others. Unfortunately, there is no video for this product. As you can see the door will not fully...

Hi, I've just fitted a new fire door closer, the instructions weren't clear. It's very heavy to open Can anyone see any obvious errors please ? Also what affect does the bar length adjustment have ? Thanks