I don't understand the premise of what he's trying to do. It seems to allude to a system where someone else decides how hot your place should be, without any thermostat feedback. In Sweden, there are apartment buildings that have centralized hydronic heating, but in those cases the hot water is on all the time and you adjust the temperature in the apartment by changing the hot water flow using the valve on the rad. If the system turns itself off when it is too cold in some parts, then he really should demand to have a professional look at the system instead of hacking it. A heating system that's unbalanced and not running optimally is likely to waste a lot of energy.