Mechanical · M-EWCW7

HVAC Coil Piping and Valve Connection Diagram

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Heating water supply and return piping connects to the water coil with valves installed as close to the coil as possible within two feet. The supply line includes copper pipe, a copper tee with threaded insert and pressure-temperature plug, a half-inch ball valve with a hose end and cap, a dielectric waterway, and a flowset accusetter valve with a memory stop, indicator, and venturi with schrader valves requiring a minimum of five pipe diameters of clearance. The return line features a two-way modulating control valve with union ends, unions, a dielectric waterway, and a manual air vent with a half-inch ball valve and union. Supply water connects to the air leaving side of the coil, while return water enters the side connected to the air vent header.

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