OPERATION
Settings
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3.3 Appliance operation outside the application
limits
f To guarantee fault-free operation of the appliance, make sure
you operate the appliance within its application limits (see
chapter "Specification/ Data table").
3.3.1 Ambient temperatures below the application limit
Low ambient temperatures may result in the formation of hoar
frost on the evaporator depending on the air humidity and water
temperature.
Active defrost feature
The frost monitor switches the fan off if the evaporator is covered
in hoar frost. The compressor continues to run. A solenoid valve
routes the hot gas directly to the evaporator. While this is happen-
ing, the condenser is disabled by another solenoid valve. When
the temperature at the frost monitor rises above the defrost end
temperature (see chapter "Specification"), the fan starts again and
DHW heating continues.
The evaporator is defrosted as required.
f To guarantee fault-free operation of the appliance, make sure
you operate the appliance within its application limits (see
chapter "Specification/ Data table").
Note
Heat-up times are longer while the evaporator is defrost-
ing.
3.3.2 Ambient temperatures above the application limit
The safety equipment can switch off the appliance if the ambient
temperature is above the application limit. If a pressure fault oc-
curs repeatedly within the duration of the pressure fault evalua-
tion, the lockout will have to be cleared by a qualified contractor.
See chapter "Specification/ Appliance parameters".
3.4 Frost protection
The appliance activates a frost protection function if the temper-
ature captured by the integral sensor is below a certain limit. See
chapter "Specification/ Appliance parameters". The appliance then
heats the water by means of the heat pump and the electric emer-
gency/booster heater. The heat pump and electric emergency/
booster heater switch off when the temperature captured by the
integral sensor reaches 18°C.
3.5 Minimum runtime and minimum pause time
!
Material losses
When operating with external switching devices that can
interrupt the power supply to the appliance, such as time
switches, energy management systems or home automa-
tion systems, must adhere to the following conditions:
- The minimum ON time is 60 minutes.
- The minimum pause time following a shutdown is
20 minutes.
- The appliance should not be switched on/off more
than 10 times per day.
- The breaking capacity of the switching actuator must
meet the fuse protection requirements (see chapter
"Specification / Data table").
4. Settings
4.1 Weatherproof cover
A weatherproof cover protects the programming unit from the
elements.
D0000093597
f Carefully flip up the lid of the weatherproof cover.
Two detents are provided so that you do not have to keep hold
of the lid.
To close, carefully press the lid onto the appliance until the locking
tabs at the sides lock in place.
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