We recently remodeled a small main floor addition. The plumber split the main floor heating zone into 2 zones. The original zone was plumbed with 3/4" copper piping. He split off of the old zone with 1/2 inch copper piping to some black plastic tubing. This services the new area. The existing area was re-run with the same 1/2 inch tubing into the existing baseboard units. He installed zone valves in each zone. Two thermostats control the the zone valves, circulator and gas furnace for each zone.
Problem: When the thermostats call for heat, and no other zones are on, and the furnace starts to fire, it makes some serious noise, hammering, banging, pipes rattling, for example, but only while it's firing. I'm wondering if by going to the 1/2 inch tubing the volume of water through the furnace has been reduced and that the furnace is being stressed and this is what is making the noise.
Opinions, comments, suggestions, remedies are all welcome...PLEASE!!
Problem: When the thermostats call for heat, and no other zones are on, and the furnace starts to fire, it makes some serious noise, hammering, banging, pipes rattling, for example, but only while it's firing. I'm wondering if by going to the 1/2 inch tubing the volume of water through the furnace has been reduced and that the furnace is being stressed and this is what is making the noise.
Opinions, comments, suggestions, remedies are all welcome...PLEASE!!