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3.2
Hot Water Temperature Controller
The desired hot water temperature can be set using the rotary dial. If the storage tank temperature is lower
than the preset hot water temperature setpoint value, the heat pump is activated (provided the 'Heat pump'
switch is set to On).
The heat pump can achieve hot water temperatures of max. 55 °C. If higher temperatures are desired, the
immersion heater, provided as standard, can be used (see Section 3.4).
Notes for efficient energy consumption
Ö Ö Ö Ö For a high coefficient of performance of the integrated heat pump and low standby losses, the HWHP
should not normally be operated at water temperatures in excess of 45 °C (Fig. 4).
Ö Ö Ö Ö Only in exceptional cases should the tempera-
ture control be set to a higher value or the
immersion heater be activated manually.
Ö Ö Ö Ö To ensure optimum compressor runtimes and
a long compressor life, the heat pump should
not be manually switched on and off in quick
succession!
3.3
'Heat Pump' Switch
When the 'Heat pump' switch is placed in the 'On' position, the heat pump is ready for operation. When the
hot water temperature in the storage tank drops below the preset setpoint value, the heat pump is activated
until the desired hot water temperature is reached.
When the switch is in the 'Off' position, the operation of the heat pump is disabled. However, the hot water
temperature controller continues to be active and allows a tank charging pump of an additional heat ex-
changer to be activated via the 'Heat exchanger' relay output. In this case, the 'Heat exchanger' switch must
be in the 'On' position.
3.4
'Immersion Heater' Switch
The integrated 1.5 kW heating element can be activated by means of the 'immersion heater' switch when
there is an increased demand for hot water or a higher hot water temperature (> 55 ±2 °C) is desired.
When the 'immersion heater' switch is in the 'On' position, the storage tank content is heated up to the set-
point temperature of the immersion heater controller (factory setting 65 °C); for hot water temperatures > 55
°C, hot water preparation takes place exclusively via the immersion heater.
Although the 'Immersion heater' switch is in the 'OFF' position, the immersion heater will switch on automati-
cally if there is a danger of frost (at air intake temperatures of 8 ±1,5°C); the water is then (only) heated until
the preset hot water temperature setpoint is reached.
Note!
-
Immersion heater controller
The immersion heater controller is a second control device for the operating range of the immersion heater
that operates independently of the hot water controller. The switch-off temperature is factory-set at 65 °C.
The immersion heater controller operates in conjunction with the safety temperature limiter (see Fig. 2).
If a different temperature setpoint is required, it should be kept in mind that the controller is not accessible
until the upper front panel has been removed (see Fig. 8). The intervention may therefore only be performed
by qualified persons. Prior to opening the unit it must be disconnected from the power supply!
~ 45 °C
~ 27 °C
min.
~ 55 °C
max.
Fig. 4: Energy-saving setting
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