Pipe connections
Bleeding
Defrosting tank
Expansion tank with safety valve, brine
Brine
Temperature and pressure relief valve
Tap water
Outdoor unit
Water heater
Heating system
1.4 Terminology
Term Meaning
Heating system/Heat transfer fluid
circuit
The circuit that generates heat to the property or to the water heater.
Supply line The heating system’s supply line with flow direction from the heat pump to radiators/
under floor heating or water heater.
Return line The heating system’s return line with flow direction from radiators/under floor heating
or water heater to the heat pump.
Circulation pump Circulation pump for heating system.
Refrigerant circuit The energy carrying circuit between the outdoor air and heating system.
Refrigerant The gas/liquid that circulates in the refrigerant circuit.
Service instructions VMGFJ102 – 5
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