What is a primary loop?What is a primary loop?

Primary Loop Piping is commonly used in boiler heating systems that run needing multiple temperatures or contstant temperature at the hydronic boiler is required. Primary Loop Piping allows non condensing boilers to maintain a heat level in the boiler high enough to allow the boiler to run at its most efficient state.Click to see full answer. Accordingly, what is a primary and secondary loop?The primary loop simply becomes the source of hot water (as opposed to a direct connection to the boiler or a holding tank). The primary loop also becomes the pressure reference point for the secondary circuit. In effect it acts like an expansion tank for the secondary circuit.Additionally, what is primary flow and return? Indirect Boiler System It is heated directly by the boiler. Indirectly, it heats the water in the cylinder. This heating is called the “primary” circuit, the pipes running to and from the boiler are called the primary flow and return. The hot water tank operates in exactly the same way as the direct system. Also, what is a secondary loop? “P” is the primary pump, which will run continuously. “S” is the secondary pump. When the secondary pump is off, no water will flow through its loop because the DP of the secondary loop is greater than the DP between the tees.What is primary and secondary chilled water system?The primary loop uses a constant speed pump to circulate the working fluid (water). The secondary loop uses a variable speed pump to manipulate the flow of the fluid such that the cooling coil demand is satisfied.

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