PRECISION AIR CONDITIONING UNITS

Delta DX/DC

Universal air conditioning system for critical applications fitted with fixed-speed or inverter compressors providing protection by engaging a secondary cooling source

30-100kW

PRODUCT OVERVIEW

Delivers efficient cooling at full and part heat loads

Delta DX/DC close control cooling system provides precise and reliable control of indoor temperature, humidity, and airflow for proper operation of electronic equipment in the data centers and other critical applications.

 

As the heat density of electronic equipment in modern data centers continue to increase, the application of Delta DX/DC solution maintains the efficiency of the cooling system and perform at optimal levels even when it is functioning at partial loads.

High-efficient centrifugal fans

SAVINGS AT FULL AND PART SPEEDS

Delta DX/DC features new radial fans with unique blade geometry and offers increased airflow based on a reduced size and increased efficiency range.

 

In combination with EC-motors with integrated control functionality, a communication interface, and overtemperature protection, these fans provide unbeatable energy efficiency, maximum flexibility, and the lowest possible sound emission.

 

EC motor technology provides significant savings at both full load and part load operation. Delta’s EC-motors are maintenance free and have a longer lifespan in comparison to brushed motors.

Scroll compressors

FIXED-SPEED COMPRESSORS
INVERTER COMPRESSORS

Fixed-speed compressors are perfectly suitable for applications where the heat load is almost constant. Customers of Delta DX/DC systems with fixed-speed compressors can benefit from a quiet operation, unmatched reliability and low operating costs.

 

For cooling systems where the heat load and operating conditions vary over a wide range, Delta DX/DC offer scroll compressors with stepless capacity modulation down to 10% of the nominal capacity, enabling precise temperature control, quiet operation, and superior energy saving.

 

Both fixed-speed and modulating compressors optimized for precision cooling applications and R410a refrigerant.

Heat exchangers

Delta DX/DC family features fin-tube heat exchangers with small-diameter inner grooved copper tubes and state-of-the-art aluminium fins.

Inner grooving increases the internal surface space, while the groove’s torsion promotes turbulent flow, improved refrigerant mixing, and eliminates incorrect refrigerant distribution, resulting in improved performance of the heat exchanger.

 

A small tube diameter requires less refrigerant and is able to withstand higher pressures. The fin geometry has been optimized to achieve improved heat transfer while retaining low airside pressure drops.

 

The laboratory experiments showed that heat exchanger coils manufactured using small-diameter tubing reduced tube weight by 35%, fin weight by 30%, and lowered internal coil volume by 40% compared to the previous generation.

 

The unit construction allows easy access to the heat exchanger for maintenance and cleaning.

Dual-cool system

The dual-cool system provides thermal management from two independent cooling sources, with direct expansion and chilled water technologies, and provides a wide range of cooling solutions with a focus on either energy efficiency or system reliability.

 

The Delta’s control system manages the system by activating DX or CW cooling circuits in accordance with the user settings.

 

Chilled water circuit features 2-way regulating valve to control the cooling capacity.

Controls

The control system of Delta DX/DC air conditioners is a last-generation controller with the logic specially developed for direct expansion precision cooling units.

 

Users can adopt various control strategies based on either continuous temperature control, or on-demand airflow control, or constant pressure control by maintaining a pressure differential between the cold and hot aisles.

A wide choice of options and accessories are available to choose from, giving our customers the possibility to tailor the Delta DX/DC system to create the cooling solution they require. 

 

Advanced control software features with network connectivity interfaces and flexible system management - either local or remote - by connecting the cooling units to the BMS network for coordinated operation and sharing the heat load.

PRODUCT SPECIFICATIONS

Cooling capacity

30-100kW

EER

Up to 3.90

Compressors

Inverter/fixed-speed

Fan type

Radial EC-driven

Heat exchangers

Fin/tube

Evaporation control

EEV

Humidity control

Available

Air filtration

G4

Refrigerant

R410a

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Kaltra Innovativtechnik GmbH


Max-Reger-Str. 44
90571 Schwaig
Germany


Email: info@kaltra.de
+49(0)911 715 32021

VAT: DE300943964

Kaltra is a customer-focused developer and supplier of reliable, energy efficient thermal management equipment and solutions.

 

From the professionalism of our research and development engineers to the wide experience of our service team, we are dedicated to delivering you the best service possible.

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