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The pressure of the refrigerant remains high when being
transferred to the expansion valve. In the valve, the
refrigerant's pressure 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 water
The heat pump produces domestic water based on the B3
measurement sensor. The domestic hot water's switching
differential 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
building'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 differential (2840)
setting
defines
the
compressor's
deactivation points. When the return water measurement
value is less than the set point by half of the return water
switching differential, 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.
temperature rise in the return water set point above the
condenser.
Example: Return water switching differential (2840) 6°C.
Supply water set point: 30°C. Condenser's temperature
difference Δt 6K.
The charging procedure is activated when the return water
measurement value (B71) reaches 21°C. The charging
ends, when the return water measurement value is 27°C.
The heat pump's charging pump rotates whenever it is in
heating mode.
10
activation
The
automation
reduces
Mixing heating circuit:
The heating circuit's supply water set point is calculated
in accordance with the outdoor temperature measurement
and the set heating curve. The controller controls the 3-
way mixing valve and keeps the heating circuit's supply
water temperature at the set point.
Heat supply and source pump:
In order for a heat pump to function at the best possible
efficiency, 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. Efficiency and savings
are reduced at temperature differences other than those
described above.
Factory settings:
Heat supply pump: 6°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 interior 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 raising the temperature of the network.
This will affect the operation of your device consuming
and
more electricity. Thermostats are designed to react only to
control of so-called free-heat (sun, heat generated by
people, fireplaces, etc. ...).
Gebwell T² Installation, Operation and Maintenance Manual
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Troubleshooting
