Yes, but it is fiddly.
You will find that the blades on the fan are not all evenly spaced and there is one gap which is quite a bit wider than the others, this is useful when trying to thread it through.
You undo the 4 screws at the top, then lift it off, you can work with it like that.
It is simplest to loop the belt over the fan and around the pulley behind it, then work it over all the others, it gets really tight when you get to the last one and you may have to try different ones until you find the easiest. Even with the tensioner at its slackest it isn't that easy, but with a bit of gentle levering it is possible.
I haven't done one for quite a while now, it may even be simpler to remove the tensioner completely and then put it back in when the rest of the belt is in position.
If you haven't got a diagram of how it goes, make a drawing before you start!
If I remember correctly it is a ribbed belt so make sure the ribs are right in their slots as you go, you may find cable ties or something useful to hold bits in place as you go.