EL-SERIES EL 006 – EL 1600

The EL series offers extremely compact, plug-in compressor cooling units that are ideal for the economical cooling of a wide range of processes.

The EL chiller generation includes a new housing concept that meets the customer’s requirement for the smallest possible footprint while maintaining a high degree of flexibility.

By using innovative technology and future-oriented refrigerants, EL chillers achieve high energy savings with a short amortization time.

Based on a modular unit concept, with cooling capacity classes up to 160 kW, a wide range of configurations can be provided to create customized units that meet specific customer requirements and applications.

The chillers are also available as continuous-flow chillers (without tank, with or without pump). If cooling water is available, all units are also available in a water-cooled version or as a pure heat exchanger without compressor.

PRODUCT FEATURES

• 22 models with 0.6 to 160 kW capacity
• The BL series is used for cooling capacities of between 2 and 6 kW.
• Compact housing for indoor installation or optional outdoor installation, painted or in stainless steel
• Easy to remove front and side panels for easy servicing and maintenance
• Refrigerant R513A, R410A or alternative refrigerants with low GWP from safety class A2L
• Integrated condenser protection grille
• Sickle blade axial fans(s)
• Fully hermetic scroll compressors (EL006 to EL015 with reciprocating compressor)
• Evaporator as stainless steel plated heat exchanger
• Thermostatic / electronic expansion valve
• High and low pressure switch
• Switching and control elements with complete wiring
• Microprocessor-controlled temperature control unit
• Automatic power control
• Corrosion-resistant water circuit with stainless steel tank, insulated against condensation
• Fixed or pressure-regulated bypass in the water circuit as pump protection
• Tank filler, level indicator and drain valve

ADVANTAGES AT A GLANCE

• Planning, project scheduling, optimization and production from one expert source
• Electronic integration into central control systems
• Commissioning, instruction and training courses for operators
• Using reputable brand manufacturers enables fast procurement of spare parts.
• 24-hour hotline and service network for Europe
• Service partners worldwide
• Maintenance contracts

SPECIFICATIONS

Installation

At the air inlet—through a filter grille on the back of the cooling unit—there should be a minimum distance of 0.5 m to a wall; at the air outlet—on the top of the unit—there should be a distance of 1–1.5 m to wall and ceiling surfaces. It must also be ensured that neither air flow resistance nor air recirculation occurs

Refrigerant

For the power classes EL 006 to EL 075, we use the refrigerant R513A as standard; for the power classes EL 092 to EL 138, we use the refrigerant R513A or alternatively R410A depending on the requirement. For EL 190 to EL 1600, we use the refrigerant R410A. If required, R513A can also be used or our new A2L alternatives.

Temperature control range

The cooling medium flow temperature can be set as standard between +15 °C and +25 °C as required. From a flow temperature below +12 °C or lower, the Ecodesign Directive (European Directive for cooling units used in Europe) applies. At temperatures below the ambient temperature and at high humidity, condensation can form on non-insulated components. To prevent condensation, the use of an ambient temperature-controlled controller or complete insulation on the water side is recommended (see options).

Hysteresis and switching frequency

The standard setting for the switching differential is +/-1 K, depending on the model. This setting optimizes the switching frequency of the compressor. With smaller switching differentials, it must be ensured that the compressor does not exceed more than 12 to 15 switching operations an hour, as this would otherwise significantly shorten the service life of the component. If a higher temperature accuracy is required, the chillers can be equipped with a hot gas bypass control, which we offer as either a 0.5 K control or a high precision 0.002 K control. For chillers with higher power classes (e.g. >8 kW) and higher temperature accuracy requirements, the use of frequency-controlled compressors instead of hot gas bypass control is recommended.

Cooling medium

The appropriate components are configured in the water circuit depending on the cooling medium. This allows pipes made of copper or plastic, steel or stainless steel to be used. The cooling medium can be a water-glycol mixture (max. glycol content of 40%, e.g. Antifrogen N), distilled / demineralized water or mineral oil according to DIN 51524 T1 and T2. The cooling medium affects the dimensioning and design of the pump and the evaporator.

Ambient temperature

The permissible ambient temperatures are between +15 °C and +42 °C as standard. The performance data refers to and ambient temperature of +32 °C. A power reduction of approximately 2% per 1 K temperature increase occurs between +32 °C and +42 °C. In addition, the chillers can be equipped for outside temperatures as low as -30 °C or as high as +55 °C with corresponding option packages.

Protection class

Protection classes IP 44 or IP 54 apply to all sizes.

Paint finish

Our standard paint colour is RAL 7035. Our in-house paint shop can provide customized paintwork in any RAL color. For outdoor installation, the base/struts are made of stainless steel and the painted sheet metal parts are coated with a separate primer and additional UV protective paint.

OPTIONS AT A GLANCE EL 006 – EL 015

• Metal filter mat
• Collective fault signal
• Overtemperature alarm
• Flow monitor
• Fault signal via Harting connector
• Supply line via Harting connector
• External balancing valve
• External dirt trap
• Reference-guided control
• Bifrequency version 50 / 60 Hz
• Special paint jobs
• Stainless steel version

OPTIONS AT A GLANCE EL 092 – EL 1600

• Metal filter mat
• Collective fault signal
• Overtemperature alarm
• Flow monitor
• Rotary field monitoring
• Fault signal via Harting connector
• Supply line via Harting connector
• Core target identification (control circuit)
• Pump 5.0 bar
• Overflow valve
• Additional flow/return
• External balancing valve
• Consumer higher (check + solenoid valve)
• External ball valves
• External dirt trap
• Tank heater 4 kW
• Flexible outdoor installation (includes ‘infinitely variable fan speed control’ option)
• Infinitely variable fan speed control
• Variable speed compressor with +/-0.5 K control
• Reference-guided control
• UL version 460 V 60 Hz
• Bifrequency version 50 / 60 Hz
• Special paint jobs
• Stainless steel version

Other options (selection): Version for high / low ambient temperatures, higher water temperatures, flow monitoring, pressure gages, special voltages as well as UL / CSA version, stainless steel housing or customized paintwork, crane lugs, rollers, customized signal exchange, teleservice, remote control, alternative pumps, etc.