7
Subject to change without notice | 83057800cUK – Translation into English of the original German operating manual | ait-deutschland GmbH
Control unit
3
1
2
1 Control
2 Push up flap upstream of USB connection
(for qualified personnel for software
updates and for data logging)
3 Wall-mounted bracket
Underside of control
1
3
4
2
1 RBE (RS 485)
2 Network cable connection
3 LIN bus cable connection to the heat pump
4 not used
3.2 Accessories
The following accessories are available for the unit
through the manufacturer's local partner:
●
Additional masking plate for the front cover
panel, if the control is mounted on the wall
●
Domestic hot water tank
●
Changeover valve, domestic hot water
●
Room thermostat for switching the cooling
function (if included)
●
Dew point monitor for protecting a system with
cooling function at low flow temperatures (if
available)
●
Expansion board for automatic changeover
between heating and cooling mode (if available)
●
“Cooling package” for use of the cooling function
●
for units without cooling: Pump assemblies
for separate storage tank and in-line tank
integration (heating circuit)
●
Heating circuit safety package
●
Heat source circuit safety package
3.3 Function
Liquid refrigerant is evaporated (evaporator), the
energy for this process is environmental heat and
comes from the “ground” heat source (collector,
borehole heat exchanger or groundwater via
intermediate exchanger). The gaseous refrigerant
is compressed (compressor), this causes the
pressure to rise and therefore the temperature too.
The gaseous refrigerant with high temperature is
liquefied (condenser).
Here the high temperature is discharged to the
heating water and is used in the heating circuit.
The liquid refrigerant with high pressure and high
temperature is expanded (expansion valve). The
pressure and temperature drop and the process
begins again.
The heated heating water can be used for the
domestic hot water charging or for the building
heating. The temperatures required and use are
controlled by the heat pump controller.
The integrated vibration isolators for the heating
circuit and heat source prevent structure-borne
sound and vibrations from being transferred onto the
fixed pipes and therefore into the building.
