Patent ID: 6976524

Claim:
An apparatus for maximum work comprising: a) refrigeration machine comprising a condenser for generating hot supply water and an evaporator for generating cold supply water; b) a water blending circuit; c) a hot supply/return piping loop connected to the condenser and the water blending circuit, a cold supply pipe connected to an evaporator primary loop and the water blending circuit, and a cold return pipe connected to the water blending circuit and the evaporator primary loop; d) the water blending circuit comprising a hot supply runout pipe connected to the hot supply/return piping loop and a cold supply runout pipe connected to the cold supply pipe; e) an upstream two position three way changeover valve connected to the hot supply runout pipe and the cold supply runout pipe, the upstream two position three way changeover valve for allowing hot water or cold water to flow through there-through; f) a modulating three way zone blending valve located downstream from and connected to the upstream two position three way valve; g) a blending pump connected to the modulating three way zone blending valve at a downstream location, h) a roomside coil connected to the blending pump, the blending pump for pumping water through the roomside coil; i) a coil return pipe extending from the coil through which coil return water exits the coil, the coil return pipe connected to the modulating three way zone blending valve and connected to a downstream two position three way changeover valve, the modulating three way zone blending valve for allowing all, a portion of, or none of the coil return water to be returned by the blending pump and pumped through the roomside coil; j) the downstream two position three way changeover valve connected to a cold return runout pipe and connected to a hot return runout pipe; k) the cold return runout pipe connected to the cold return pipe that connects to the evaporator primary loop and is for returning cold water to the evaporator primary loop, and the hot return runout pipe is connected to the hot supply/return piping loop connected to the condenser and is for returning hot water to the condenser; and l) a means for control for controlling the refrigeration machine.