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Note: The room control strategy for heating and cooling, is not controlled by the heat pump. That
is done by the thermostat of the air handler or radiant heating zone for example. The heat pump
attempts to maintain a buffer tank temperature that is enough for the zone heaters to do the job of
heating or cooling that space. When in heating mode the Heat Pump is controlling only the
temperature of the buffer tank which is then used by an additional controller to heat zones. With
cooling the heat pump keeps the cooling buffer tank at the set temperature. The secondary fan coil
or air handler distributes this cold water as required to cool the space.
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