Refrigeration Circuit - Pfannenberg DTT 6401 Serie Instrucciones De Servicio

ENG
3.4.6

Refrigeration circuit

Fig. 7: Refrigeration circuit
1 Compressor
2 Condenser
3 Expansion valve
4 Evaporator
The cooling units consist of different components, see Fig. 7.
• The compressor (1) compresses the refrigerant with high pressure. The temperature rises.
• This heat is dissipated into the ambient air in the condenser (2). The refrigerant becomes liquid.
• The condenser fan (5) sucks in room air through the condenser (2) and discharges it into the ambient air.
• If the refrigerant passes through the expansion valve (3), there is a drop in pressure.
• In the evaporator (4), the refrigerant draws heat from the air inside the cabinet and evaporates it. The air inside
the cabinet is cooled and dehumidified.
• The evaporator fan (internal) (6) sucks in the air from inside the cabinet through the evaporator (4) and feeds it
back into the switch cabinet as cool air.
The cooling units are controlled by a temperature sensor (7). It measures the air inside the switch cabinet.
Operating Manual | Roof-mounted Cooling Unit | Multi Controller (MC) – 400 V, 3~ | 086100035c
5 Condenser (external)
6 Evaporator fan (internal)
7 Electronic control with temperature sensor
G00004
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