11 685408014B
according to the provisions of 9.ProdSV (German
regulations covering accident prevention).
• PCN has to do the electrical safety testing to every
cooling before delivery.
5 Name plate
For the installation and maintenance, please notice the
details technical data on the name plate which to be find
on the back of the cooling unit casing.
6 Safety
Cooling units produced by
Pfannenberg
are designed
for application dissipating heat from switch cabinets (IP
54).
The cooling unit is only suitable for installing on the
stationary operation.
Only the authorized specialist can be work on the cooling
system and electrical components.
Please make sure to comply with relevant safety and
environmental regulations.
Hazard!
Cutting off cooling unit power supply before carrying
out any cleaning or maintenance operations.
Only original spare parts may be used.
7 Function
7.1 Function and configuration
Equipment configuration:
1. High quality key components
2. Protection device for the compressor
3. Intelligent control system
4. Condensate evaporator (optional)
5. 2~Phase 400Vac power supply (optional)
Equipment function:
1.
General
external
environment
temperature:
+15
℃
~+55
℃
2. General inside control temperature: +25
℃
~+45
℃
3.
Start-up self-check and real-time self-check
4. IP54 / IP34 protection class
5. Condensate evaporator (optional)
6. 2~Phases 400Vac power supply (optional)
Caution:
Please refer to the attached technical specification for the
details function of the cooling unit.
7.2 Operating principles
The compressor (1) compresses the refrigerant until high
pressure is achieved. During this process temperature
increases. In the condenser (2) heat is dissipated to
ambient air, the coolant becoming liquid. The condenser
fan (5) of the compensate takes ambient air in through the
condenser, and then it releases the air.
In the expansion valve (3) the pressure of the coolant
drops. In the evaporator (4) the coolant absorbs heat from
the air in the switch cabinet and evaporates. Thus, the air
in the switch cabinet cools down. At the same time the air
inside the switch cabinet is being dehumidified. The
evaporator fan (6) sucks the air out of the switch cabinet
via the evaporator, the cooled air flows back to the switch
cabinet.
The cooling unit is electronically controlled. For that
purpose a temperature sensor records the temperature of
the air inside the switch cabinet (7).
The refrigerant is not detrimental to the ozonosphere; it is
hardly combustible.
7.3 Condensate
During cooling on the evaporator the moisture removed
from the air is collected as condensate. In order to avoid
any damage to the switch cabinet and the cooling unit,
the condensate must be discharged.
