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SK3311.491 Rittal LCU DX split cooling unit 3 kW
Rittal SK3311.491 LCU DX split cooling unit with 3 kW cooling capacity, redundant design, IP20 internal unit protection and rack-level IT cooling capability.
This product has been discontinued
A direct replacement is available below.
Replacement product
102663
SKU: SK3313.610
£4,476.35 ex VAT
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Why Choose the Rittal SK3311.491 LCU DX Split Cooling Unit?
The Rittal SK3311.491 is an advanced LCU DX split cooling unit for IT racks and Micro Data Centres designed to provide reliable, refrigerant-based cooling for high-density electronic equipment. As part of the Rittal LCU DX cooling system range, it delivers efficient rack-level climate control without increasing the temperature of the surrounding installation room.
This redundant LCU DX solution consists of an internal evaporator unit and two inverter-controlled external cooling units, providing increased availability for critical IT infrastructure. The internal unit is designed for installation within compatible Rittal VX IT server enclosures or Micro Data Centres, supporting IT-optimised front-to-back airflow management.
With a maximum cooling output of 3 kW, an internal unit protection rating of IP20 and a compact internal unit depth of 820 mm, the SK3311.491 provides an efficient cooling solution for small to medium-sized IT installations requiring dependable thermal management and redundancy.
Key Advantages
- High-efficiency LCU DX split cooling unit for IT racks and Micro Data Centres.
- 3 kW cooling capacity suitable for compact high-density IT applications.
- Redundant design with two inverter-controlled external cooling units.
- Maintains server inlet temperatures through intelligent IT-based control.
- Internal unit installation saves valuable rack space.
- Supports reliable operation of critical IT infrastructure.
Key Features
- Rittal SK3311.491 LCU DX 3 kW redundant cooling unit.
- Refrigerant-based split cooling technology.
- Maximum cooling output: 3 kW.
- Internal unit protection rating: IP20.
- Internal unit depth: 820 mm.
- Two inverter-controlled external cooling units.
- EC fan technology for efficient operation.
- Inverter-controlled compressor adapts cooling output to heat load.
- Uses R410A refrigerant.
Reliable Rack-level Cooling for IT Infrastructure
The Rittal SK3311.491 LCU DX split cooling unit provides dedicated cooling directly at the server rack level, reducing dependence on room-wide cooling systems. By extracting warm server exhaust air and returning cooled air to the front of the IT equipment, it supports efficient front-to-back airflow management.
The redundant configuration improves system availability by using two inverter-controlled external units with automatic changeover capability. This makes the SK3311.491 suitable for smaller and medium-sized data centre environments where continuous cooling performance is essential.
Typical Applications
- Data centre server racks.
- Rittal VX IT enclosure cooling.
- Micro Data Centre installations.
- High-density IT infrastructure.
- Network and communications equipment rooms.
- Critical electronic equipment environments.
Technical Specifications
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| Device Type | Wall / door-mounted cooling unit | |
|---|---|---|
| Refrigerant Type | R410A | |
| Coil / Supply Voltage | 230 V AC, 1-phase | |
| IP Rating | IP20 | |
| Voltage | 230 V AC | |
| Cooling Output (W) | 3000 W | |
| Manufacturer | Rittal | |
| Series | LCU DX Cooling Units | |
| Model | SK3311.491 | |
| Alternative part number | 3311491 | |
| Product type | LCU DX split cooling unit | |
| Design | LCU DX 3 kW redundant | |
| Modulation range | 1–3 kW | |
| Internal unit protection rating | IP20 | |
| External unit protection rating | IPX4 | |
| Refrigerant | R410A | |
| Internal unit dimensions (W × H × D) | 105 × 1550 × 820 mm | |
| External unit dimensions (W × H × D) | 810 × 558 × 310 mm | |
| Rated operating voltage | 230 V AC 1-phase 50 Hz | |
| Rated current | 7 A | |
| Pre-fuse | 16 A | |
| Duty cycle | 100% | |
| Suitable enclosure | Rittal VX IT width ≥800 mm, height ≥1800 mm, depth ≥1000 mm |
Frequently Asked Questions
What is the Rittal SK3311.491 used for?
The SK3311.491 is an LCU DX split cooling unit designed to provide dedicated cooling for Rittal VX IT server enclosures and Micro Data Centres.
What cooling capacity does the SK3311.491 provide?
The Rittal SK3311.491 provides a maximum cooling output of 3 kW.
What does the redundant design provide?
The redundant design uses two inverter-controlled external units to improve availability and provide automatic changeover during faults or service conditions.
What is the internal unit protection rating?
The internal unit of the SK3311.491 has an IP20 protection rating.
Which enclosures are suitable for the SK3311.491?
The unit is designed for Rittal VX IT enclosures with a width of at least 800 mm, height of at least 1800 mm and depth of at least 1000 mm.
Trusted by Data Centre Engineers
Rittal LCU DX cooling solutions are widely used in IT infrastructure environments to provide efficient rack-level cooling, reliable thermal management and dependable protection for critical electronic equipment.
