by plumbbob »
Tue Dec 07, 2010 8:43 pm
Cold weather won't make any difference. Obviously, it is difficult and unwise to state a definitive answer about the safety of a device from the distance of a forum.
2.5 bar is high, but not an excessive pressure. Pressures as high as 3 or 4 bar aren't likely to pose any serious risk, but there is the increased possibility of joints and seals failing because of the unnecessary pressure. Any dangerous levels will be automatically vented by the pressure relief valve.
Theoretically, the filling loop should not be left connected because of the possibility of backflow contaminating the mains water. In reality, almost all loops are left permanently connected.
Check the pressure often to ensure it is not inching higher. Look at the difference between a cold and hot system. It will be higher when hot. Does the pressure rocket when warming from a cold start?
If you want and know how to, operate the relief valve manually to vent some of the higher pressure to drop it to about 1.5 bar.
