LT(K) Series industrial coolers
Cooling capacity 1 kW to 7.5 kW
Compact refrigeration units and industrial refrigeration systems for the small capacity range
The industrial cooling systems of the LT Series consist of the components refrigerant circuit, water circuit and electrical engineering – completely installed in one housing.
The basic version is equipped ready for connection and operation, in air-cooled design for frost-free indoor installation.
Individually configurable and expandable according to customer specifications.
Circulating media
Water 
Emulsion 
Oil
Flow temperature range
10 – 40 °C
Quality and performance features of LT(K) recooling systems
Efficiency in the smallest space
- Wide range of options due to flexible modular principle
- Individual and application-specific configuration optimised for a wide range of customer requirements, e.g. special voltages, higher ambient temperatures, multi-circuit system, interface connection, etc.
- Smooth integration into the production layout due to smallest dimensions and individual colour selection
- Available as stand-alone or built-in unit
- High precision control
- Automatic power adjustment
- Standard temperature stability +/- 1 K
- Flexible control and temperature precision through ACC control possible on request
- Also available as continuous-flow cooler or passive cooling system (heat exchanger)
Main applications: Laser, welding and tooling technology, cooling of lathes, milling, grinding and eroding machines, cooling of spindles, machine beds and electronics, etc.
- Compact device tested by us in-house, in test run lasting several hours
- Compact industrial housing for indoor installation
- Device standing on wheels (LT 4.5 LC - LT 6.5 LC)
- Painted in RAL 7012
- Air-cooled condenser with copper pipes and aluminium lamellae, extremely efficient
- Axial fan, extremely low-noise and maintenance-free, with contact protection
- CFC-free coolant
- Hermetic compressor, 100 % suction gas-cooled
- Evaporator as a plate heat exchanger or pipe coil heat exchanger
- Thermostatic expansion valve for optimum coolant injection
- High and low-pressure pressure switch
- Water circuit with tank, pump, pump bypass valve
- Water filling via tank
- Water circuit piping made from stainless material (iron-free)
- Water tank made from plastic, heat-insulated
- Pumps made from bronze or stainless steel
- Digital controller with target and actual value display
- Switching and control elements completely wired
- Automatic power adjustment
- CE-compliant
- Refrigeration technology designed according to DIN EN 378, part 2
- Electronics designed according to DIN EN 60204
- RoHS and REACH-compliant
- Outdoor installation
- Air filer mat
- Radial fans
- Split design
- Water-cooled condenser
- Low-noise design
- Refrigeration gauge for high and low-pressure sides
- Temperature stability ± 0.2 K
- Cold fluid outlet temperature < +8 °C
- Overflow valve
- Fixed bypass
- Multi-circuit system
- Heat recovery
- Flow monitor with analog or digital signal
- Water filter
- Gate valves in flow and return
- Check valves and solenoid valves for the water circuit (consumers higher than coolers)
- Reinforced pump
- Tank filling, pressureless, from outside
- Automatic water replenishment
- Water temperatures up to 40 °C
- Tank heating for temperature control
- Pump switch-off
- Water circuit made from stainless steel or PVC for deionised water
- Conductance monitoring
- Air filter mat monitoring
- Continuously variable speed regulation of the fans
- Wire marking
- External on/off switch
- Heavy-duty connector (e. g. Harting)
- 24V AC/DC control voltage
- Special voltages and frequencies (50/60 Hz)
- Limit temperature monitoring
- Differential temperature regulation
- External temperature sensor
- Cabinet heating
- Cabinet fan
- Bus connection, e. g. Profibus DP
- Individual fault indicators (in the plain text display or as bit technology)
- RAL special colours upon request
- Mobile version (LT Mini / LTK)
| Series type LT mini / LTK / LT | Einheit | LT Mini 09.5 | LTK 1.4 | LTK 2.4 |
|---|---|---|---|---|
| Cooling capacity at water inflow temperature | W | |||
| +10 °C | 800 | 1200 | 1800 | |
| +15 °C | 1000 | 1600 | 2300 | |
| +20 °C | 1050 | 1800 | 2400 | |
| Compressor drive | W | 480 | 700 | 990 |
| Number of fans | 1 | 1 | 1 | |
| Air capacity | m3/h | 500 | 410 | 410 |
| Pump capacity | l/min | 2 | 18 | 18 |
| Pump drive capacity | kW | 0,15 | 0,65 | 0,65 |
| Pump pressure | bar | 3,2 | 3 | 3 |
| Connection capacity | kW | 0,69 | 1,5 | 1,8 |
| Tank contents | l | 6 | 30 | 30 |
| Water connections DN | Inches | 1/2 | 1/2 | 1/2 |
| Width (W) | mm | 443 | 650 | 650 |
| Length (L) | mm | 555 | 650 | 650 |
| Total height (H) | mm | 350 | 550 | 550 |
| Weight when empty: about | kg | 42 | 80 | 90 |
| Series type LT mini / LTK / LT | Einheit | LTK 3.4 | LT 4.5 LC | LT 5.5 LC |
|---|---|---|---|---|
| Cooling capacity at water inflow temperature | W | |||
| +10 °C | 2200 | 3500 | 4900 | |
| +15 °C | 3000 | 4200 | 6000 | |
| +20 °C | 3200 | 5100 | 7200 | |
| Compressor drive | W | 1090 | 940 | 1300 |
| Number of fans | 1 | 1 | 1 | |
| Air capacity | m3/h | 410 | 2600 | 2600 |
| Pump capacity | l/min | 18 | 20 | 20 |
| Pump drive capacity | kW | 0,65 | 0,65 | 0,65 |
| Pump pressure | bar | 3 | 3 | 3 |
| Connection capacity | kW | 2,1 | 2,2 | 2,3 |
| Tank contents | l | 30 | 30 | 30 |
| Water connections DN | Inches | 1/2 | 1 | 1 |
| Width (W) | mm | 650 | 600 | 600 |
| Length (L) | mm | 650 | 600 | 600 |
| Total height (H) | mm | 550 | 1296 | 1296 |
| Weight when empty: about | kg | 90 | 110 | 110 |
| Series type LT mini / LTK / LT | Einheit | LT 6.5 LC |
|---|---|---|
| Cooling capacity at water inflow temperature | W | |
| +10 °C | 5000 | |
| +15 °C | 6500 | |
| +20 °C | 7500 | |
| Compressor drive | W | 1650 |
| Number of fans | 1 | |
| Air capacity | m3/h | 2600 |
| Pump capacity | l/min | 20 |
| Pump drive capacity | kW | 0,65 |
| Pump pressure | bar | 3 |
| Connection capacity | kW | 2,5 |
| Tank contents | l | 30 |
| Water connections DN | Inches | 1 |
| Width (W) | mm | 600 |
| Length (L) | mm | 600 |
| Total height (H) | mm | 1296 |
| Weight when empty: about | kg | 110 |
Water temperature range: from +8 °C to +25 °C (other ranges on request).
Type of cooling: air-cooled with axial fan (water-cooled or with radial fan on request).
Electrical connection: LT mini, LTK in 230 V/50 Hz, LT 4.5 LC, LT 5.5 LC, LT 6.5 LC in 400 V N PE 50 Hz (other voltages and frequencies on request).
Designed ambient temperature: +32 °C (higher and lower temperatures on request).
Application range of the industrial cooler: from +8 °C to + 42 °C ambient temperature (higher and lower temperatures on request).
Circulation medium: drinking water (according to specification) with a spread of about 5 K between water inlet and outlet (other ranges on request).
Technical modifications and errors reserved.
- Compact device tested by us in-house, in test run lasting several hours
- Compact industrial housing for indoor installation
- Device standing on wheels (LT 4.6 LC - LT 6.6 LC)
- Painted in RAL 7012
- Air-cooled condenser with microchannel technology
- Axial fan, extremely quiet and maintenance-free, with contact protection,
depending on performance class, with EC technology - CFC-free refrigerants with low global warming potential
- Hermetic compressors, 100% suction gas cooled
- Evaporator as plate heat exchanger (from LTK series)
- Expansion device for optimum refrigerant injection
- Intrinsically safe refrigeration circuit
- Air filter mat (LT 4.6 – LT 6.6)
- Pump bypass valve for system protection (from LTK series)
- Manual medium filling via filler neck
- Visual medium level indicator (LT 4.6 – LT 6.6)
- Piping of the medium circuit made of corrosion-inhibiting materials (depending on the medium)
- Medium container made of plastic, thermally insulated
- Pump made of stainless steel (from LTK series) or brass (LT Mini)
- Digital temperature controller with setpoint and actual value display
- Switching and control elements fully wired
- External on/off switch (LT 4.6 – LT 6.6)
- Potential-free collective fault signal (LT 4.6 – LT 6.6)
- Outdoor installation
- Air filter mat (LT Mini – LTK)
- Fans with air duct connection
- Split design
- Water-cooled condenser
- Noise-reduced design
- Refrigeration pressure gauge for high and low pressure sides
- Medium temperature < +8 ºC
- Medium temperature up to 40°C
- Increased temperature stability ± 0.5 K/ 0.1 K/ 0.02 K
- Overflow valve (LT Mini)
- Multi-circuit system
- Heat recovery
- Fixed bypass
- Pump pressure gauge
- Flow monitor with analog or digital signal
- Medium filter
- Shut-off valve in flow and return
- Automatic tank filling via mechanical float switch
- Automatic tank filling via solenoid valve
- Optical medium level indicator (LT Mini – LTK)
- Tank heating for temperature control
- Check valve and solenoid valve for the water circuit (consumer higher than cooler)
- Reinforced pump
- Stainless steel or PVC water circuit for deionized water
- Conductivity monitoring
- Air filter mat monitoring
- Stepless speed control of the fans
- Optical medium level indicator (LT Mini – LTK)
- External on/off switch (LT Mini – LTK)
- Potential-free collective fault signal (LT Mini – LTK)
- Wire destination labeling
- Heavy-duty connectors (e.g., Harting)
- 24V AC/DC control voltage
- Special voltages and frequencies (50/60 Hz)
- Limit temperature monitoring
- Reference temperature control
- External temperature sensor
- Control cabinet heating
- Control cabinet fan
- Bus connection, e.g., Profibus
- DP/Ethernet/Profinet/Modbus TCP
- Individual fault indicators (in plain text display or as bit technology)
- RAL special color of your choice
- Level monitoring with signal contact and/or optical signaling
- Installation feet
- Mobile version (LT Mini / LTK)
| Series type LT mini / LTK / LT | Unit | LT Mini 09.6 | LTK 1.6 | LTK 2.6 |
|---|---|---|---|---|
| Cooling capacity at water inflow temperature | W | |||
| +10 °C | 800 | 1200 | 1800 | |
| +15 °C | 1000 | 1500 | 2300 | |
| +20 °C | 1200 | 1600 | 2400 | |
| Compressor drive | W | 480 | 600 | 1100 |
| Number of fans | 1 | 1 | 1 | |
| Air capacity | m3/h | 500 | 900 | 900 |
| Pump capacity | l/min | 5 | 18 | 18 |
| Pump drive capacity | kW | 0,21 | 0,65 | 0,65 |
| Pump pressure | bar | 2 | 3 | 3 |
| Connection capacity* | kW | 0,75 | 1,3 | 1,8 |
| Maximum connected load * | kW | 0,8 | 1,4 | 2,4 |
| Tank contents | l | 6 | 30 | 30 |
| Water connections DN | Inches | 1/2 | 1/2 | 1/2 |
| Width (W) | mm | 443 | 650 | 650 |
| Length (L) | mm | 555 | 650 | 650 |
| Total height (H) | mm | 350 | 550 | 550 |
| Weight when empty: about | kg | 42 | 80 | 90 |
| Series type LT mini / LTK / LT | Unit | LTK 3.6 | LT 4.6 LC | LT 5.6 LC |
|---|---|---|---|---|
| Cooling capacity at water inflow temperature | W | |||
| +10 °C | 2200 | 3500 | 4900 | |
| +15 °C | 3000 | 4200 | 6000 | |
| +20 °C | 3200 | 5100 | 7200 | |
| Compressor drive | W | 1100 | 1900 | 1520 |
| Number of fans | 1 | 1 | 1 | |
| Air capacity | m3/h | 9000 | 2600 | 2600 |
| Pump capacity | l/min | 18 | 20 | 20 |
| Pump drive capacity | kW | 0,65 | 0,90 | 0,90 |
| Pump pressure | bar | 3 | 3 | 3 |
| Connection capacity* | kW | 1,8 | 3,7 | 3,0 |
| Maximum connected load | kW | 2,4 | 4,0 | 3,9 |
| Tank contents | l | 30 | 30 | 30 |
| Water connections DN | Inches | 1/2 | 1 | 1 |
| Width (W) | mm | 650 | 600 | 600 |
| Length (L) | mm | 650 | 600 | 600 |
| Total height (H) | mm | 550 | 1180 | 1180 |
| Weight when empty: about | kg | 90 | 110 | 110 |
| Series type LT mini / LTK / LT | Unit | LT 6.6 LC |
|---|---|---|
| Cooling capacity at water inflow temperature | W | |
| +10 °C | 5200 | |
| +15 °C | 6500 | |
| +20 °C | 7500 | |
| Compressor drive | W | 1520 |
| Number of fans | 1 | |
| Air capacity | m3/h | 2600 |
| Pump capacity | l/min | 20 |
| Pump drive capacity | kW | 0,9 |
| Pump pressure | bar | 3 |
| Connection capacity* | kW | 3,0 |
| Maximum connected load | kW | 3,9 |
| Tank contents | l | 30 |
| Water connections DN | Inches | 1 |
| Width (W) | mm | 600 |
| Length (L) | mm | 600 |
| Total height (H) | mm | 1180 |
| Weight when empty: about | kg | 110 |
* at 15°C medium and 32° ambient temperature
Water temperature range: from +10 °C to +25 °C (other ranges on request).
Type of cooling: air-cooled with axial fan (water-cooled or with air duct connection on request).
Electrical connection: LT mini, LTK in 230 V/50 Hz, LT 4.6 LC, LT 5.6 LC, LT 6.6 LC in 400 / 460 V N PE 50 / 60Hz (other voltages and frequencies on request).
Designed ambient temperature: +32 °C (higher and lower temperatures on request).
Application range of the industrial cooler: LT Mini +10 °C to + 32 °C ambient temperature ; from Series LTK: +8 °C to + 42 °C ambient temperature (higher and lower temperatures on request).
Circulation medium: drinking water (according to specification) with a spread of about 5 K between water inlet and outlet (other ranges on request).
Technical modifications and errors reserved.
The cold fluid circuit mainly consists of a compressor, an air-cooled condenser, expansion valve and evaporator. In accordance with the process requirements, also radial condensers (for the air duct connection), split condensers (outer/inner unit) and a water-cooled condenser version are available. We only use CFC-free coolants such as e. g. R134a and R407C. All cooling components are made by renowned brand manufacturers and guarantee reliability, long service life and global availability. The entire cold fluid circuit is designed for the optimal and most economic function of the industrial cooler and corresponds to the most recent Standards of the CE directive and of DIN EN 378, Part 2.
The entire electronics circuit is designed for the optimal function of the industrial cooler and corresponds to the most recent Standards of the CE directive and of DIN EN 60204. In all models of the LT series, precise temperature control is carried out by a microprocessor-controlled digital temperature controller. All LT industrial coolers are suitable for indoor installation and can optionally also be installed outside.
The components of the water circuit are made as standard from stainless material and completely fitted in the stable industrial housing. The water tank is made from very stable and water-neutral plastic with tank cover (stainless steel tank as an option). The hydraulic decoupling of the water circuit from the cooling circuit ensures endless areas of application in industry. The complete water circuit is fitted in the device with a circulation pump, pump manometer, pump overflow valve for pump protection, complete pipework as well as a diffusion-proof and highly efficient insulation. The water circuit (piping, evaporator and pumps) is designed for a defined flow and pressure. Different pumps are available for special requests (more pressure and/or higher flow volume). Circulation media other than water (e. g. oil) are, of course, also feasible. The design as a through-flow cooler (without tank, possibly without pump) is also feasible.
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Used machines
Our standard industrial coolers are also available both from stock and as reconditioned used units. We are constantly expanding the range of our used machinery market.
It’s worth a look. Maybe there is something for your application.
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