Hot water operation mode
(When the water temperature in tank is decreased below setting temperature)
Cooling operation mode
100% of hot water from water heat exchanger goes to tank.
(Take note that water ow going in/out tank is different from
combined mode).
Water pump controls its speed by watching temperature with
BT12 in order to adjust hot water volume to be returned. (DC
motor pump can control variable speed)
100% of cold water from water heat exchanger goes to
radiator/fan coil etc.
Water pump runs at constant speed set at commissioning.
When the hot water demand occurs,
Electric heater is permitted: Electric heater is energized.
Electric heater is prohibited: Outdoor unit is switched
to Hot water mode.
Counterow in water heat exchanger EP2
Parallel ow in water heat exchanger EP2
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