🔍 Key Concepts

• Study how three-way thermostatic valves are drawn in piping diagrams (one inlet/two outlets vs two inlets/one outlet). • Trace the flow of central fresh water around the central cooler: through the cooler, around (bypass), and where these streams rejoin. • Understand the difference between a mixer (combining two streams into one) and a diverter (splitting one stream into two).

💭 Think About

• From the illustration, does the thermostatic valve sit where one line comes in and two lines go out, or where two lines come in and one line goes out? • Does the valve’s job appear to be controlling how much water goes THROUGH the cooler, or controlling the TEMPERATURE of water being SENT TO the consumers by blending cooled and bypassed water? • Follow the arrows: is the flow that returns from the system being split before the cooler, or are the cooled and bypass lines joining just after the cooler at the thermostat symbol?

✅ Before You Answer

• Verify whether the symbol at the low temperature central fresh water thermostat has two connections on one side and one on the other (typical three‑way arrangement). • Confirm which line is the bypass around the central cooler and which is the cooled outlet; see how they interact at the thermostat. • Before choosing, be sure whether the thermostat primarily acts as a mixer (two in, one out) or a diverter (one in, two out) in this specific diagram.