The cooling unit DTT 6801 400V MC 7035 from Pfannenberg is a roof-mounted cooling unit for air conditioning of enclosures in industrial applications. It is specifically designed for use in production environments where efficient cooling, space-saving, and safety are priorities. The unit is mounted on top of the enclosure, thus preserving floor space in the production area and keeping escape routes unchanged. The robust construction made of sheet steel protects the unit from mechanical damage and makes it suitable for demanding industrial environments. The hood is powder-coated and available in RAL 7035 color, with alternative colors available upon request.

Roof-mounted cooling unit is the product type characterized by its mounting on top of the enclosure. This design enables optimal use of available space, as the unit does not need to be placed under the enclosure. The patented condensate evaporation is a central feature that reverses the operating principle of conventional roof cooling units. This allows condensate to be evaporated within the unit itself, preventing it from entering the enclosure. This 4-fold protection against condensate increases reliability and extends the lifespan of electrical components inside the enclosure.

Functions and equipment in detail include the Multi-Controller (MC), which enables an energy-saving switching mode. This mode turns off the internal fan as needed, saving energy. Control is performed via an additional sensor that monitors the internal temperature. Energy efficiency is enhanced by using more powerful and lighter components, resulting in energy savings of approximately 20%. The protection rating IP 54 against the enclosure and IP 34 against the environment (when used as intended) ensures high protection against dust and splashing water, which is essential for industrial applications.

Technology explained simply shows that the unit operates with R134a as refrigerant, with 1250 g contained in the unit. The cooling capacity is 4000 to 4250 watts at an ambient temperature of +35 °C and an enclosure internal temperature of +35 °C (A35/A35). The power consumption is 1618 to 2050 watts. The unit is designed for an operating voltage of 400 V ±10 %, 3~, 50/60 Hz. The air flow rate is 1420 to 1530 m³/h internally (free-blowing) and 1970 to 2180 m³/h externally. The noise level is below 62 dB(A), which is acceptable for industrial environments.

Compatibility and accessories include use with enclosures from various manufacturers, as the unit is universally applicable. It is available in three sizes and six performance levels. Accessories include a condensate bottle (part number 18314000100), a quick-change frame (18300000146), non-woven (18300000147), pleated (18300000148), and aluminum filters (18300000149), as well as a filter adapter (18310000151). These components can be used to improve air quality or adapt to specific requirements.

Installation and mounting are tool-free, using a quick-mount frame, simplifying installation and maintenance. The hood is removable from the front, providing quick access to internal components such as filters and control elements. The filter mat is optional and can be easily replaced. The mounting design allows installation without special tools, accelerating maintenance during operation.

Operational advantages include high reliability, easy maintenance, and energy efficiency. The unit maintains a constant internal temperature in the enclosure, extending the lifespan of electronic components. The integrated condensate evaporation with safety overflow prevents damage from water accumulation. The control ranges are adjustable: for the standard control (SC), the range is +25 to +45 °C (factory-set to +35 °C); for the Multi-Controller version (MC), it is +25 to +50 °C (factory-set to +35 °C). The ambient temperature can range from +15 to +55 °C, and the unit can also be operated at higher temperatures up to +59 °C (131 °F).

The unit is constructed with a robust sheet steel design suitable for industrial environments. The hood is galvanized or electrostatically powder-coated (200 °C) and painted in RAL 7035. It is also available in stainless steel, with the stainless steel version available upon request. Dimensions are 795 mm (X), 485 mm (Y), 575 mm (Z), 392 mm (A), and 692 mm (B). Weight is 77 kg (without packaging). Connection is made via spring clamp terminals on an included connector.

The delivery includes the cooling unit with integrated condensate evaporation, the Multi-Controller, the hood, the quick-mount frame, and necessary fastening elements. Batteries, additional filters, or condensate bottles are not included in the delivery and must be ordered separately.