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8.1
8.1 Basic Heating Using the Heat Pump
A request for domestic hot water is recognised if the current
hot water temperature < (is lower than)
Set temperature – hysteresis DHW.
A request for domestic hot water ends if
hot water temperature > set temperature
Menu
Preconfiguration
Preconfiguration
Tab. 8.1: Settings for basic heating of domestic hot water (user settings carried out in compliance with the operator's manual)
8.1.1
Attainable Hot Water Temperatures
The maximum hot water temperature which can be attained with
heat-pump-only operation is dependent on:
The heat output of the heat pump
8.1.2
Hot Water Temperatures Dependent on the Heat Source
The heat pump manager automatically calculates the maximum
possible hot water temperature. It is designated as HPMaximum.
HP Maximum is - along with the influencing factors described in
Chap. 8.1.1 on p. 26 - also dependent on the current
temperature of the air, brine or water heat source. To ensure that
the maximum possible hot water temperature is always attained,
the permissible range of the heat source temperature is divided
into temperature ranges. Each range has a specific HPmaximum
8.2 Reheating with Flange Heater/2nd Heat Generator
Reheating means that the heat pump undertakes DHW
preparation until the HP Maximum Temperature is reached.
Subsequently, an additional heat generator takes over DHW
preparation until the desired set temperature is reached.
Reheating is only activated if the desired set temperature is
higher than the current HPMaximum Temperature.
Reheating is activated whenever
the hot water temperature is above the maximum
temperature attainable with the heat pump.
Menu
Preconfiguration
Preconfiguration
Settings
Tab. 8.2: Enables for selective reheating using a flange heater (user settings carried out in compliance with the operator's manual)
8.3 Thermal Disinfection
A start time is specified for the thermal disinfection. By starting
the thermal disinfection, the system will immediately attempt to
reach the set temperature. Selection of the DHW generator used
for thermal disinfection is dependent on the operating mode of
the heat pump system, the configuration, and the current
statuses of the system. Thermal disinfection is ended once the
set temperature is reached.
EN-26
NOTE
DHW heating can be interrupted by defrosting or by the high-pressure
safety program.
Submenu
Hot water preparation
Flange heater
The heat exchanger surface area installed in the cylinder
and
The volume flow in relation to the pressure drop and the
capacity of the circulating pump.
temperature and each HP maximum is pre-assigned a default
value of 65 °C.
If the high-pressure pressure switch activates during DHW
preparation with the heat pump, the current heat source
temperature is measured and the associated HP Maximum
Temperature is calculated as follows:
1 K is deducted from the currently measured hot water
temperature and is stored as HP Maximum.
If the hot water temperature falls below the Set temperature –
hysteresis DHW during reheating, the reheating process is
stopped and basic heating is started using the heat pump.
Selection of the respective heat generator for DHW generation is
dependent on the operating mode of the heat pump system, the
configuration, and the current statuses of the system.
Reheating must be enabled in the menu "Settings – Hot water
reheating".
Submenu
Hot water preparation
Flange heater
Hot water reheating
To enable the thermal disinfection settings menu, a bivalent
heating system and/or flange heater must be set with "Yes" in the
preconfiguration.
NOTE
If the set temperature is not reached within 4 hours, the thermal
disinfection is terminated. The set start time can be activated or
deactivated separately for each day of the week.
Set value
Yes
No
Set value
Yes
Yes
Yes
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