Mitsubishi Electric’s variable-refrigerant-flow PWFY hydronic heat exchanger basic unit is available in two sizes: 36,000 and 72,000 Btu, and operates in three modes: heating (full temperature range), heating ECO (supply temperature based on outdoor ambient) and antifreeze (maintains circulation to prevent pipe freeze). It can provide hot water from 86° to 113° F and cool water from 50° to 86°. This unit is connectable to VRF modular units, water-source modular units and hyper-heating units. The booster unit also can be connected to raise the water temperature up to 160°.
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