80
Start-up - initial settings and functions
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NOTE
If the DHW setpoint (T5S) > 55°C, change the parameter according to the formula dT1S5 = 65 - T5S. Setting
dT1S5 higher than this criterium makes the unit work faster and less ecient in charging cycles but also
means that the unit will go into normal protection before reaching the setpoint with subsequent restart and
loss of the benefits of the faster ramp.
1.8 T4DHWMAX (standard: 43 - settable: 35/43)
Defines the maximum outdoor air temperature for which the unit can operate in DHW with heat pump
1.9 T4DHWMIN (standard: -10 - settable: -25/30)
Defines the minimum outdoor air temperature for which the unit can operate in DHW with heat pump.
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NOTE
Below T4DHWMIN, if within the operating range, the unit can produce DHW with the DHW storage tank
heater (TBH).
1.10 t_INTERVAL_DHW (standard: 5 - not adjustable)
Defines the minimum minutes between compressor shutdown and subsequent restart in DHW mode.
Activation logic of heat pump and TBH storage tank heater in DHW mode.
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NOTE
The activation logics of the DHW storage tank heater (TBH) are automatically managed by the unit.
1 DHW MODE SETTING 3/5
1.11 dT5_TBH_OFF
5°C
1.12 T4_TBH_ON
5°C
1.13 t_TBH_DELAY
30 min
1.14 T5S_DISINFECT
65°C
1.15 t_DI_HIGHTEMP.
15 MIN
ADJUST
Fig. 72
1.11 dT5_TBH_OFF (standard: 5 - settable: 0/10)
Defines how many degrees above the DHW setpoint (T5S) the storage tank heater (TBH) must be brought to.
When TBH is activated, the DHW storage tank will be brought to temperature T5S + dT5_TBH_OFF.
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NOTE
When the temperature of the DHW storage tank (T5) reaches T5stop, the heat pump stops and the DHW
storage tank heater (TBH) can continue to operate. The TBH heater is switched o when the DHW storage
tank temperature is T5 > T5S + dT5_TBH_OFF or T5 > 65°C. Any protection of the heating element built
into the storage tank should be set to T5S+dT5_TBH_OFF.
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