Pfannenberg DTT 6401 Serie Instrucciones De Servicio página 55

GB
1 Intended use
1.1 General overview
Die Pfannenberg roof-mounted cooling units of the DTT series DTT are stationary cooling units for the dissipation
of heat from switch cabinets. The DTT cooling units are mounted on the switch cabinet roof.
The cooling units have different cooling outputs. For exact power specifications, see
The cooling units have cut-out compatibility with air/air heat exchangers and air/water heat exchangers. Use of
aluminum filters, fleece filters and fluted filters is possible with an additional adapter.
The cooling units are available with different controllers. Cooling units are available with a standard controller (SC)
or a multicontroller (MC). These controllers are regulating units for the adjustment of refrigeration functions and
operating data. They also enable readouts of system messages and diagnostic data. The multicontroller (MC) is
also equipped with a multimaster function and energy saving mode.
 For detailed specifications for the controller, see
All Pfannenberg cooling units are ROHS-compliant and free from:
• silicone connections
• PCT, asbestos, formaldehyde, cadmium
• moisture-impairing substances
 All cooling units are factory-tested for conformance to pressure tightness standard UVV-BGV D4.
 Comprehensive safety testing is carried out in the factory prior to delivery. The proper and safe condition of the
cooling units is checked. The operator's duty in according to Accident Prevention Regulation BGB A2, §5 (4) for the
electrical safety testing during the initial commissioning does not apply.
1.2 Permissible usage conditions
 The permissible ambient air temperature range of
 The permissible storage temperature of DTT cooling units must not exceed +70 °C (+158°F).
1.3 Duty of the operator
The operator must ensure that the cooling units are used exclusively as intended and dangers of all types to the life
and limb of users or third parties are avoided. In addition, accident prevention regulations and recognized safety
rules are observed.
The operator must ensure that all users have read and understood this operating manual.
Non-observance of this operating manual will void the warranty. The same applies if improper work has been
carried out on the unit by the customer and/or third parties without the approval of the manufacturer.
Operating Manual DTT 6401 Multicontroller (MC) 086100035a © Pfannenberg GmbH
Controller, Electrical connection
cooling units is +15°C (+59°F) to +55°C (+131°F).
DTT
Technical.
and control panel.
Page 5 / 50