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The hot refrigerant is conveyed to the condenser, where the heat
energy of the refrigerant is transferred to the water circulating in
the building's heating system. The refrigerant condenses into liq-
uid upon releasing heat energy.
The pressure of the refrigerant remains high when being trans-
ferred to the expansion valve. In the valve, the refrigerant's pres-
sure decreases rapidly. From the expansion valve, the refrigerant
passes on to the evaporator where it is once again evaporated. At
this point, the refrigerant absorbs heat from the liquid solution
circulating in the heat collection piping.
3.5
Heating functions
DOMESTIC HOT WATER
The heat pump produces domestic hot water based on the B3
measurement sensor. The domestic hot water's switching differ-
ential is 5 degrees. The compressor is factory set to activate when
the measurement value drops under +50°C and deactivated when
the value reaches +55°C.
HEATING
The heat pump produces heating water directly into the build-
ing's heating network in accordance with the set point that is
created from the outdoor temperature and the set heating curve.
The control automation activates the charging on the basis of the
calculated set point and return water measurement (B71) formed
by the controller. The heat pump's return water switching differ-
ential (2840) setting defines the compressor's activation and de-
activation points. When the return water measurement value is
less than the set point by half of the return water switching dif-
ferential, the compressor is activated. The compressor turns off
when the return water measurement value reaches the set point
+ half of the return water switching differential. The automation
reduces temperature rise in the return water set point above the
condenser.
Example: Return water switching differential (2840) 6°C. Out-
put water set point: 30°C. Condenser's temperature difference Δt
6K.
The charging procedure is activated when the return water meas-
urement value (B71) reaches 21°C. The charging ends, when the
return water measurement value is 27°C. The heat pump's charg-
ing pump rotates whenever it is in heating mode.
v1-6 29082018
MIXING HEATING CIRCUIT:
The heating circuit's output water set point is calculated in ac-
cordance with the outdoor temperature measurement and the set
heating curve. The controller controls the 3-way mixing valve
and keeps the heating circuit's output water temperature at the
set point.
HEAT SUPPLY AND SOURCE PUMP:
In order for a heat pump to function at the best possible effi-
ciency, the conditions of the heating system and collector must
be ideal. The difference between the heating system's output and
input temperatures must be 6°C–10°C and the output and input
temperature difference of the collector must be 3°C–4°C. Effi-
ciency and savings are reduced at temperature differences other
than those described above.
Factory settings:
Charging pump: 7°C
Source pump: 4°C
3.6
Tips for saving
The heat pump's function is to produce heat and domestic hot
water according to your wishes. The system aims to fulfil these
wishes by all means available, within the framework of the set
values.
Important factors affecting the energy consumption are the inte-
rior temperature, hot water consumption, hot water temperature
level, the insulation level of the real estate, as well as the desired
level of comfort.
Please note the above points when making changes on the device
for settings.
IMPORTANT!
Thermostats for floor heating and radiators can have a negative
impact on energy consumption. They slow down the flow in the
heating system and the heat pump will compensate this by rais-
ing the temperature of the network. This will affect the operation
of your device consuming more electricity. Thermostats are de-
signed to react only to control of so-called free-heat (sun, heat
generated by people, fireplaces, etc. ...).
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