GB
985408004
10/20
3
Scope of delivery and options
3.1 Scope of delivery
The Scope of delivery includes:
• Cooling unit,
• Operating and assembly instructions,
•
Description of the electronic control
,
• Supplement sheet,
• Enclosed package, (gasket, fastening material, electrical plug-
type connectors)
• special accessories, if applicable.
3.2 Options
The following parts may be ordered separately:
• Filter adapter
• Fleece filter; (Filter adapter required)
• Textile filter; (Filter adapter required)
• Metal filter; (Filter adapter required)
• further options on request or in accordance with the catalogue.
4
General Information
• Old devices can be properly disposed of by Pfannenberg. They
must be sent to one of our works shipment/postage paid.
• All cooling units produced by Pfannenberg are free from
– silicone compounds,
– PCB,
– PCT,
– asbestos,
– formaldehyde,
– cadmium,
– substances impairing wetting.
• All cooling units are ROHS compliant.
• Every cooling unit is checked to ensure that it is tight according
to the provisions of UVV-BGV D4 (German regulations covering
accident prevention).
• Prior to delivery the electrical safety of every cooling unit is
factory tested. This means that, in accordance with UVV-BGV
A2, §5 (4), the operating company is released from the obligation
to arrange for a test of the electrical part of the cooling unit be-
fore initial start of operation.
5
ID Plate and Technical Data
For installation and maintenance, note the data on the ID plate; it is
to be found on the back of the cooling unit casing
The technical details applicable to the cooling unit are in the accom-
panying
supplement
sheet
or
on
our
homepage
(www.pfannenberg.com).
6
Safety
Cooling units produced by
Pfannenberg
are designed for dissipat-
ing heat from switch cabinets (IP 54). During each cooling process
condensate can be produced. The cooling unit is only suitable for
stationary operation.
The cooling unit may only be used under the ambient conditions
specified on the accompanying supplement sheet.
The cooling unit is to a large measure maintenance-free (see Sec-
tion 11).
Every other use is considered as non-authorized use making any
warranty null and void.
The electrical equipment must be regularly checked. Any faults such
as loose connections or scorched cables must be removed immedi-
ately.
Work on the cooling system and on electrical components may only
be carried out by authorized specialist personnel.
Compliance with applicable safety and environmental regulations is
mandatory.
Hazard!
Isolate the cooling unit from the mains before carrying out
any cleaning or maintenance operations.
Only original spare parts may be used. Please find spare parts in
the accompanying supplement sheet.
7
Function
7.1 Principles of function
1 Compressor
2 Heat exchanger
(condenser)
3 Expansion valve
4 Heat exchanger
(evaporator)
5 fan, exterior circulation
6 fan, inner circulation
7 Electronic control system with temperature sensor
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 becom-
ing liquid. The condenser fan (5) of the condensator takes ambient
air in through the condenser, 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.
7.2 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 dis-
charged.
The condensate is evaporated into the surroundings with an inte-
grated evaporator. For safety reasons, there is a drain nozzle on the
evaporation unit on which the drain hose is attached.
In order to selectively collect any condensate arising, a condensate
collection bottle is available as an accessory (art. no.
18314000100).
Excessive condensation can occur if, for example, the switch cabi-
net is not sealed or if the internal temperature of the switch cabinet
is frequently below the dew point.
