New 5 frame nuc installed

Just installed five frame nuc yesterday, bees seem healthy and queen was present on frames. Also put top feeder on top of crown board then empty super then roof. Checked today and bees don't seem to be feeding on the sugar syrup, and bees aren't flying. Is this normal, or have I don something wrong ? Please help

 

[VEG]

better off posting on main forum as this is for blogs.