In order to reach the Buffer tank set point, compressor frequency shall be controlled so that Outgoing water
temperature can reach the maximum temperature in Heating mode (60°C) or minimum temperature in Cooling
mode (7°C). And, the compressor is turned ON/OFF based on Buffer tank set point being reached as well.
7.2.5.3 HP unit controlled based on Buffer tank temperature
Start of operation
Compressor control
When the water set point is reached, compressor is halted
Compressor OFF→ON control
When the Outgoing water temperature does not reach the water set point, HP unit is turned ON.
The compressor is controlled to reach the maximum temperature in Heating mode (60°C) or minimum
temperature in Cooling mode (7°C).
The compressor shall be turned OFF if the Buffer 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.
Heating: Buffer tank temp. Buffer tank set point (Par2161)
Outgoing water temp. Maximum Outgoing water set point (60°C) +1°C
Outgoing water temp. 62.5°C
Cooling: Buffer tank temp. Buffer tank set point (Par2162)
Outgoing water temp. Minimum Outgoing water set point (7°C) -1°C
Outgoing water temp. 5.0°C
When the Buffer tank temperature reaches the set point, or when the conditions below are met after the
compressor is turned OFF due to the set point protecting the HP unit, the compressor is turned ON.
However, the compressor is not turned ON during 3 minutes OFF-ON waiting time.
Heating:
Buffer tank temp. Buffer tank set point (Par2161) – Hysteresis (Par2141)
Outgoing water temp. Water set point (60°C) – Hysteresis (Par2141)
Outgoing water temp. 57.5°C
Cooling:
Buffer tank temp. Buffer tank set point (Par2162) + Hysteresis (Par2142)
Outgoing water temp. Water set point (7°C) + Hysteresis (Par2142)
Outgoing water temp. 7.0°C
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7. Unit Management
Summary of Contents for AEYC-0639U-CH
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