For Atec use the following dimensions for supply and return pipes:
1 Supply line 28 mm copper pipe
2 Return line 28 mm copper pipe
4.4.3 Atec System solution
System solution Atec Standard
Atec Standard includes the control module with supply and return line sensors. The heat pump produces only heat or cooling. Two
heating circuits can be connected, one using a shunt. The shunt is controlled by the heat pump control system. The flow line tempera-
ture is controlled with reference to the outside temperature following a set heat curve. The additional heater starts automatically on
demand.
Buffer tank is installed for equalisation of the temperature for the heating system and to guarantee sufficient energy when defrosting.
The buffer tank volume must be 20 l/kW heat pump output (for systems without water heaters).
Atec Standard does not contain a water heater. Water heater is available as an accessory for Atec Plus and is included in Atec Total.
For postition explanations, see the chapter Symbol Key.
Installation Guide
Atec
Thermia Värmepumpar VMBQY102
15
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