Click on the image below to see a illustration of a typical water-source building
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As the most energy efficient HVAC systems on the market, Water-Source Heat Pumps are uniquely simple in design. Heat is moved through an interconnected water loop and either rejected through a cooling tower, or put to work in other areas. Each unit is an independent, packaged system, eliminating the chance of a total system failure. If one unit goes down, the other units are not affected. Conveniently located above the ceiling or in a closet, units can be easily accessed.
System Modes
Water-Source Heat Pump systems can operate in one of four modes depending on the space conditioning requirements. The versatility of operation allows Water-Source Heat Pumps to show their full potential as a solution for customized comfort and flexibility.
Cooling Mode
The system extracts heat from the air and rejects it into the water loop through the coaxial refrigerant-to-water heat exchanger. This heat can either be moved to a different part of the building to satisfy a heating mode requirement, or be rejected out of the building via a cooling tower.
Heating Mode
The system extracts heat from the water loop through the coaxial heat exchanger and compresses it to a higher temperature. This heat is then transferred into the air through the air coil and used to condition the building space. A nominally sized boiler is often used to maintain a constant temperature of 60 to 70°F in the water loop during high heating demand months. Within this temperature range, the units can operate in either heating or cooling mode.
Balanced Mode
A mixture of units in heating mode and units in cooling mode create a constant temperature in the water loop. In Balanced Mode, there is no need for heat injection or rejection via the boiler or cooling tower. The heat is simply moved from one zone to another.
Dehumidification Mode
The system, using a multi-speed blower and separate humidistat, slows the air movement across the air-coil to extract moisture and provide a more comfortable space. An additional reheat coil is available on select products for those climates where high humidity is a problem.
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