vibration and rattle in baseboard radiator
Ussually you will have some air that needs to be removed from the system each fall as you have stated. In a high rise this can be a little more complicated, as the pressures in the system needs to be maintained at a higher level to push the water in the system to the higher floors.
It normally requires bleeding at each rad if the system has been opened up throughout the summer for repair. This may mean that each suite may need the rads bled, depending on how many suites are on each zone(depending on how high the complex is). If your suite is the highest floor of the zone, most of the air will accumulate at your rads.
Some larger systems have automatic air vents that are placed into the main lines to automaticaly remove air from the high points in the system. These can fail and may need replacement.
It is also common to loose pressure over the summer and need to increase system pressure for full flow to the upper floor rads. Making up for this pressure drop is generally accomplished by a pressure reducing valve, and backflow preventer from the city line pressure. It is possible that this is not working, or shut off.
I would start by asking them to bleed the rads in your suite and go from there, as you may need further information about the layout of the system to make any further suggestions. You may also want to see if other tenants are having the same amount of noise you are and determine if the problem is "in general" or only specific to your suite.