Safety; Intended Use; Permissible Usage Conditions - Pfannenberg DTT 6801 Serie Betriebsanleitung

ENG
2

Safety

2.1

Intended use

The Pfannenberg roof-mounted cooling units of the DTT-series are stationary cooling units for heat dissipation from switch
cabinets. The DTT-cooling units are mounted on the switch cabinet roof.
The cooling units have different cooling capacities. See the chapter "Refrigeration circuit", Page 24for exact capacity
The cooling units have a cut-out compatibility with air/air heat exchangers and air/water heat exchangers. The use of aluminum
filters, felt filters or bellows filters is possible with an additional adapter.
The cooling units are available with different controllers. Cooling units with a Standard-Controller (SC) or a Multi-Controller (MC)
are available. These controllers are control unit for setting refrigeration functions and operating data. They also enable readout
of system messages and diagnostic data.
The Multi-Controller (MC) is additionally equipped with a Multimaster function and an energy-saving mode.
• For detailed data of the controller, see chapter "Technical data", Page 24, "Electrical connection", Page 38and
"Operation", Page 47.
All Pfannenberg cooling units are RoHS compliant and free from:
• Silicone compounds
• PCT, asbestos, formaldehyde, cadmium
• Substances that cause wetting defects
2.2

Permissible usage conditions

• The permissible ambient air temperature of the DTT-cooling units is at +15°C to +55 °C (+59 °F to +131 °F).
• The permissible storage temperature of the DTT-cooling units may not exceed +70 °C (+158 °F).
• Operation of the DTT-cooling units is only permissible with stationary assembly and with the switch cabinets closed.
Operating Manual | Roof-mounted Cooling Unit | Standard Controller (SC) – 400 / 460 V, 3~ | 086100040b
data.
7/8