
7.2.5.5 HP unit controlled based on DHW tank temperature
Start of operation
Compressor control
Compressor OFF→ON control
When the DHW tank temperature does not reach the DHW set point, HP unit is turned ON.
Comfort : DHW tank temp. DHW Comfort set point (Par3111) – Hysteresis (Par3113)
Economy : DHW tank temp. DHW Economy set point (Par3112) – Hysteresis (Par3113)
Force : DHW tank temp. DHW Over boost set point (Par3114) – Hysteresis (Par3115)
The compressor is controlled to reach the maximum temperature in Heating mode (60°C).
When the water set point is reached, compressor is halted.
The compressor shall be turned OFF if the DHW tank set point is reached, or if the Outgoing water temperature
is in the following conditions, or the Outgoing water temperature reaches the set point to protect HP unit.
Comfort:DHW tank temp. DHW Comfort set point (Par3111)
Economy:DHW tank temp. DHW Economy set point (Par3112)
Force: DHW tank temp. DHW Over boost set point (Par3114)
Outgoing water temp. Maximum Outgoing water set point (60°C) + 1°C
Outgoing water temp. 62.5°C
When the DHW tank temperature reaches the water set point, or when the conditions below are met after the
compressor is turned OFF due to the set point to protect HP unit, the compressor is turned ON.
However, the compressor is not turned ON during 3 minutes OFF-ON waiting time.
Comfort:DHW tank temp. DHW Comfort set point (Par3111) – Hysteresis (Par3113)
Economy:DHW tank temp. DHW Economy set point (Par3112) – Hysteresis (Par3113)
Force: DHW tank temp. DHW Over boost set point (Par3114) – Hysteresis (Par3115)
Outgoing water temp. Water set point (60°C) – Hysteresis (Par4101)
Outgoing water temp. 57.5°C
Note: In case the Outdoor temperature is lower than -5°C, HP unit can change the set point of Outgoing water
temperature if the Heating capacity of HP unit decreases.
By this function, DHW can be switched to Heating/Cooling operation before maximum time for DHW
(Par3121=60min) elapses.
DHW tank set point can be selected from Comfort, Economy, or Force.
In order to reach the DHW tank set point, compressor frequency shall be controlled so that Outgoing water
temperature can reach the maximum temperature in Heating mode (60°C).
And, the compressor is turned ON/OFF if the DHW tank temperature reaches the set point.
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7. Unit Management
Содержание AEYC-0639U-CH
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