🔍 Key Concepts

• Count how many circulating pumps (M symbols on the water side) are shown in the diagram. • Look at the manifold labeled Zone Returns to decide whether this is a single zone or multi‑zone system. • Decide whether the drawing shows one central heating coil/converter feeding several zones or separate coils for each zone.

💭 Think About

• Trace the flow of hot water from the converter through the pump(s) and into the system: do you see more than one pump symbol on the distribution side? • Follow the piping coming back to the point marked Zone Returns: are there multiple separate return lines or just one? • Ask yourself if each zone appears to have its own pump and coil, or if all zones share one pump and one main heating unit.

✅ Before You Answer

• Carefully count the number of pump symbols in the hot‑water circulation loop (not on the steam side). • Verify how many separate zone return connections tie into the header marked Zone Returns. • Confirm whether there is one central heat exchanger/heating coil feeding all the branches, or multiple distinct coils shown.