Our industry has dealt with primary/secondary piping systems for years. Many hydronic heating pros know how these systems operate as well as how they are designed. Still, based on communications I've had with system designers, it's evident that questions remain. Some that come up quite often deal with flow reversal between the closely spaced tees that connect the secondary circuit to the primary loop. They include: (1) Can flow reversal even occur? (2) Would it cause damage or interfere with other parts of the system if it did occur? (3) How might it affect the heat output of the secondary circuits? (4) Should I use a large circulator in the primary loop to make sure flow reversal cannot occur?
展开▼
