Rittal SK 3311380 External Hybrid Condenser – Steel Housing, White, 35,000 W Cooling, 400 V, 50/60 Hz

The Rittal SK 3311380 External Hybrid Condenser is a high-capacity cooling device in a white steel housing, designed for heat rejection in large electrical and HVAC enclosures. Intended for use with liquid cooled packages (LCPs) that use refrigerant-based cooling, this condenser provides up to 35,000 W of cooling power and is engineered for roof or wall mounting in industrial environments. It operates on a 400 V supply and supports both 50 Hz and 60 Hz systems, making it suitable for varied installation regions and standard industrial power infrastructures.

Advantages

The unit delivers a high cooling capacity of 35,000 W in a robust steel enclosure finished in white, combining durable construction with straightforward installation options. Compatibility with refrigerant-based LCP systems ensures integration into existing liquid-cooled setups, while the hybrid design—featuring an external condenser and fan with optional free cooler capability in specific variants—allows flexibility for applications that require additional free-cooling performance. Support for 400 V and both 50/60 Hz frequencies makes the condenser adaptable to common industrial power supplies.

Suitable for

• Heat rejection from large electrical enclosures and switchgear using refrigerant-based LCP systems
• Industrial HVAC installations requiring external condenser units mounted on roofs or walls
• Applications that need up to 35 kW of cooling capacity in a compact external unit

When it may not be suitable

This condenser is intended for use with refrigerant-based LCP systems and may not be suitable for installations that require non-refrigerant cooling methods (for example, direct water cooling without a refrigerant circuit). It is a high-capacity, external condenser unit; smaller enclosures or low-duty applications that require minimal cooling may be better served by lower-capacity or integrated cooling solutions.

Key specifications

• Cooling capacity: up to 35,000 W
• Housing material and finish: steel housing, white
• Supply voltage: 400 V
• Frequency: 50/60 Hz compatible
• Mounting options: roof or wall mounting
• Design type: external hybrid condenser with external fan; some variants include a free cooler option for LCP DX/FC combinations

How to use

Integrate the condenser with a refrigerant-based liquid cooling package (LCP) according to the system design and manufacturer installation guidelines. Select an appropriate mounting location on the roof or wall that provides sufficient airflow and service access. Ensure electrical connection to a 400 V supply with correct phase and frequency matching (50 or 60 Hz) and follow local electrical codes. Commission the combined system by verifying refrigerant charge, leak-free connections, correct pump and fan operation, and that the condenser is achieving expected heat rejection under load conditions.

What to consider before purchase

• Confirm the required cooling capacity matches or is below the unit’s 35,000 W rating
• Verify compatibility with the specific refrigerant-based LCP system (LCP DX or LCP DX/FC variants)
• Ensure site can provide 400 V supply and supports 50/60 Hz operation
• Check available roof or wall mounting space and required clearances for airflow and maintenance

Usage recommendations

For reliable performance, install the condenser with adequate clearance for airflow and routine maintenance, verify electrical and refrigerant connections during commissioning, and choose the variant with the free cooler when combining with LCP DX/FC systems to take advantage of additional free-cooling capacity.