Air cooler / Evaporator
Flat ceiling air coolers for demanding applications
DLKA/DLKAT
HFC | Water | Brine
Compact ceiling air cooler for cold and low-temperature storage rooms
Robust design ensures durability and low maintenance requirements
Low moisture loss in goods thanks to large surfaces and a highly efficient tube system
EC fans for energy-efficient operation (up to top mark A)
Efficient defrosting system for reliable cooling
Easy cleaning in accordance with hygiene requirements
Top class ceiling air cooler
With its flat, robust design, the DLK is suitable for all cold rooms with special requirements. These can include the frequent movement of people, aggressive particles owing to a wide range of goods or changing purposes. With uniform air distribution, it ensures a stable room temperature and meets the strictest hygiene requirements owing to its corrosion resistance.
The DLKA/DLKAT is used in these areas of application
Food Industry
Especially high demands are placed on refrigeration in the food industry. Hygiene, energy efficiency and reliability are the top priorities.
But even when it comes to requirements for refrigerants, corrosion protection, material combinations, practical fin spacing, optimised tube and fin geometries, uniform air distribution or energy efficiency, Roller offers the optimised solution for every performance range and every application with its wide product range of evaporators and air coolers.
Storage & Logistics
The requirements for cooling in warehouse logistics could not be more diverse. The tasks are very specific:
In plus cold stores for fruit and vegetables, it is crucial that the sensitive chilled goods are stored in the right conditions and cooled gently. Dairy products are highly perishable and require a closed cold chain. Ripening chambers turn fruit varieties into products ready for sale.
In deep-freeze warehouses, uniform temperature distribution is important, reliable air coolers protect against thawing of the goods. In order-picking rooms, the impact on employees must be minimised. Roller offers a variety of individual solutions for all applications.
Commercial refrigeration
The range of refrigeration technology for the retail trade is broad. Whether it's a butcher's shop, bakery, flower shop, petrol station, restaurant or supermarket - each sector has its own requirements to ensure optimum product quality.
One thing is always in the foreground: reliability in refrigeration technology when it comes to failure safety, hygiene or energy efficiency. Roller is the specialist for air coolers, evaporators and heat exchangers for the commercial sector.
Product benefits
Your advantages at DLKA/DLKAT
Heat exchanger with thick fins
for cleaning with a high-pressure cleaner
Fully aluminium housing,
scratchproof powder-coated finish
Double drip pan construction
to avoid condensation
EC fan technology
as standard for optimum energy efficiency in all sizes
Corrosion protection:
heat exchanger corrosion protection for use in aggressive environments
High-performance tube systems:
Aligned Roller high-performance tube systems with internally grooved tubes
Features
All product advantages at a glance
General
- Cooling capacity from 0.5 to 10 kW
- Temperature range: DLKA: 0 – 40 °C / DLKAT: -35 – 50 °C
- Fin spacings 4 / 4.5 / 6 mm
- Defrosting: electric, optional: Brine
- Operating pressure up to 25 bar/ 60
Easy assembly
- Generously sized spaces at the sides of the unit for easy access via side doors, removable
- Hinged drip pan for cleaning and servicing work
- Flat hanging rails made from rustproof CrNi steel
- Connections with threaded nipple, ventilation and drain valve (water or brine mode)
- Drain heating can easily be retrofitted/replaced
- Heating rods and fans wired to terminal box
- Wall mounting thanks to additional drip pan (option)
Inspection and cleaning
- Double pan construction to avoid condensation
- Side doors can easily be removed
- Aligned tube pattern and fin spacings of up to 6 mm for easy cleaning
- Large-radius housing corners and drip pan for easier cleaning
- Heat exchanger can be cleaned from three sides
- Thick fins (0.3 mm) for extra stability during cleaning
- Hinged / removable fan plate with drip tray for easy installation and cleaning of the unit
Energy efficiency
- Optimized aligned tube system with smooth fins ensures low pressure losses on the air side and high air flow
- EC fans for energy-efficient operation as standard
- Adjustment of the air volume flow according to the cooling load via external controller (0 - 10 V)
- Air cooler energy efficiency class up to top mark "A"
- Multi-fan units with intermediate plates for optimum flow through the heat exchanger
Corrosion protection
- Corrosion-resistant aluminium housing with scratchproof powder coating
- Corrosion protection for the heat exchanger and housing to withstand a range of environmental conditions
- Stainless steel housing (optional)
Defrosting
- Heating rods in the coil for reliable defrosting, in aluminium housing to prevent vapours
- Defrost safety thermostat interrupts electric defrosting if the defrost control system (accessory) malfunctions
- Large heat exchanger surfaces remove less moisture from the air and thus reduce the need for defrosting
- Defrosting using brine circuit
Accessories
Find suitable accessories for the DLKA / DLKAT
Stainless steel design
for outstanding corrosion protection in aggressive atmospheres
Auxiliary heating
for condensation drain
Additional drip pan
for wall mounting
EC plug-on module:
Stepless speed control from 50-100% (0-10V) by using a plug-on module
Further accessories
Defrost safety thermostat switch - contact opens at +25 °C and closes at +6 °C
References
Supermarket cooling - DLKA - Migros Swiss
Wherever cold rooms with different goods have to be cooled, the extremely resistant DLK evaporator is used. Biaggini likes to use the DLK/DLKA because of its thick fins and high corrosion resistance, as here in Migros supermarkets.
| Application | Supermarket cooling |
|---|---|
| Address | Zürich / Swiss |
| Fluid | CO2 |
| Product | DLK / DLKA |
Reconstruction large kitchen - DLKA - Schlittenhardt
Schlittenhardt's task was to upgrade all of its customer's cooling equipment while its large kitchen was still operating. When modernizing the five cold stores, Schlittenhardt opted for various products including DLK/DLKA evaporator units from Roller. To ensure reliable operation, the units which were previously used inside were installed on the canopy and the very latest control systems were used.
| Application | Gastronomy refrigeration |
|---|---|
| Address | Karlsbad / Germany |
| Fluid | HFC |
| Product | DLK / DLKA |
Product documentation
Technical data
All important technical data
| Product name | DLKA | DLKAT |
|---|---|---|
| Capacity range | 0,7 - 6 kW | 0,5 - 10 kW |
| Temperature range | 0 - 40°C | -35 to +50°C |
| Defrost heater | Without | Block and Drip tray |
| Tubes | Internally grooved | Internally grooved |
| Tube system | Aligned | Aligned |
| Number of fans | 1 - 4 | 1 - 4 |
| Fan typ | EC / Forced / IP 54 | EC / Forced / IP 54 |
| Fan size | 250 mm | 250 mm |
| Fin spacing | 4 / 4,5 / 6 mm | 4 / 4,5 / 6 mm |
| Energy efficieny class | A to C | A to C |
How can we help you?
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Make a concrete enquiry now!
Tel.: + 66 2 645 3881-3
suppasilp@rollerthailand.com
