Thermia iTec Eco, Руководство пользователя

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3 About your heat pump
3.1 Components and functions
3.1.1 Heating
The heat pump can produce heat for heating (house, pool) and hot water.
The heat pump installation consists of two units: a heat pump placed outdoors and a control unit placed in-
doors. Both can be used in an existing heating system that is to be upgraded and in new builds. Heating and
cooling are supplied to the house via a water borne system.
3.1.2 Hot water
iTec Compact, iTec Total and iTec Total EQ are adapted for hot water production. Production of heating, cool-
ing and hot water cannot occur at the same time. Hot water production is prioritised before heating and cool-
ing.
iTec Compact, iTec Total and iTec Total EQ have integrated 180 litre tanks equipped with a TWS coil (Tap Water
Stratificator) which gives more effective heat transfer and efficient layering of water.
Using a regular time interval (NOT active in COMPRESSOR mode), the water in the tank is given extra heat by
the integrated immersion heater to prevent the build up of bacteria, an anti-legionella function. The factory set
time interval is seven days (can be adjusted).
The hot water requirement is prioritised before the heating requirement. The heating requirement is calculated
from outdoor temperature and set heat curve. An auxiliary heater starts automatically on demand, if installed.
3.1.3 Defrost
During operation the outdoor units' air heat exchanger is cooled by the energy exchange, at the same time the
humidity causes it to become covered in frost at low outdoor temperatures. iTec Eco has an automatic function
to defrost the air heat exchanger using the energy from whatever heat source is currently active.
Defrosting is initiated by low temperature in the refrigerant circuit after the air heat exchanger and, among
other things, is dependent on outdoor temperature, humidity and operating time. The length of defrosting var-
ies depending on the extent of freezing of the air heat exchanger. Defrost continues until the air heat exchang-
er is free of ice and the temperature starts to rise in the refrigerant circuit. After completed defrosting the heat
pump returns to the operating mode before defrosting.
User Guide iTec Eco
Thermia AB AWIE01UG102
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