243
Control function
NOTE
:
1. Tow/Tow3 should be lower than 55°C to start heat pump
.
(4) DHW Electric Heater operates during Space heating/cooling.
When heat pump shift to Space heating/cooling operation at the time that DHW schedule priority is activated (referring to
10.1.2.1.1) and DHW setting temperature (TDHWS) is not met, it is possible that heat pump does not have enough capacity
to heat up DHW in this DHW operation shift. So DHW Electric Heater can start to oer additional capacity.
● DHW Electric Heater will start if:
①
Heat pump shift to Space heating/cooling operation form DHW operation referring to 10.1.2.1.1.
②
Current DHW temperature (TDHW) is lower than DHW setting temperature (TDHWS) -2 °C.
③
DHW schedule priority is activated at specic setting Starting Time referring to 10.1.2.1.1 (1).
Or
①
Heat pump is Space cooling operation.
②
Average outdoor ambient temperature is more than 38°C-40°C , that is out of heat pump heatingoperation range.
③
Current DHW temperature (TDHW) is lower than DHW setting temperature (TDHWS) - [DHW_ht_di] °C.
④
DHW schedule priority is activated at specic setting Starting Time referring to 10.1.2.1.1 (1).
● DHW Electric Heater will stop if:
DHW setting temperature (TDHWS) is met or Auxiliary electric heater starts.
TDHW/TDHW1
TDHWS1_time1
TDHWS2_time2
THPSTOP
DHW schedule priority
Starting Time2
DHW schedule priority
Starting Time1
TDHWS-[DHW_ht_diff]
Space heating/cooling operation(Switch ON)
DHW operation(Switch ON)
DHW Electric Heater operation
DHW schedule priority
Starting Time3
Hot Outdoor ambient
temperature
DHWEH
time1
time2
Time3
10.3.5 DHW Anti-legionella protection
In order to help prevent against Legionella in the domestic hot water system, the DHW set point can be raised to a higher
than normal temperature. The Legionella protection only makes sense if there is a DHW electric heater to raise the DHW
temperature to this high temperature.
Heat pump and DHW Electric Heater will work at mode of [H.Demand] to achieve quick heating up.
DHW Anti-legionella can be activated by manual ON or weekly timer.
● DHW Anti-legionella can be activated by manual ON through the master controller interface of DHW.
The operation of this function should be done through the master controller interface of DHW.
Mark Description Default Value Range Steps Units
DHW Antilegionella OFF OFF/ON - -
NOTE:
1. DHW Anti-legionella manual ON through the master controller interface of DHW will be forced o after specic time (about
80minutes).