KOOLTRONIC 604521-L5D1-01 – Industrial Panel Air Conditioner | K2NA Series
Engineering Background
KOOLTRONIC has been a trusted name in thermal management for industrial enclosures since 1962. Designed for demanding environments where electronics must be protected from heat, dust, and humidity, the K2NA series represents the company’s commitment to precision-engineered, field-proven cooling solutions used across automation, power distribution, and process control industries worldwide.
Product Positioning
The KOOLTRONIC 604521-L5D1-01 (cross-reference: 9501F / R134A K2NA4C3P21L5D-1 / DA02A-33110 / 810-240888-002) is a self-contained panel-mount air conditioner engineered for electrical enclosure thermal management. It uses environmentally compliant R134A refrigerant and is built to maintain stable internal temperatures in harsh industrial settings, protecting sensitive PLCs, drives, and control electronics from thermal failure.
Complete Technical Specifications
| Manufacturer | KOOLTRONIC |
| Part Number | 604521-L5D1-01 |
| Cross Reference | 9501F | R134A K2NA4C3P21L5D-1 | DA02A-33110 | 810-240888-002 |
| Series / Platform | K2NA Series |
| Product Type | Industrial Panel Air Conditioner |
| Refrigerant | R134A (HFC, non-ozone-depleting) |
| Mounting Style | Panel / Enclosure Mount |
| Application | Electrical Enclosure Cooling |
| Country of Origin | USA |
| Condition | New / Surplus / Refurbished (specify on inquiry) |
Proven Application Environments
- PLC and DCS control panel thermal management
- Variable frequency drive (VFD) enclosure cooling
- Power distribution cabinet climate control
- Outdoor electrical enclosures in high-ambient environments
- Semiconductor and cleanroom support equipment
- Oil & gas, petrochemical, and water treatment facilities
- Automotive and heavy manufacturing plant floors
Engineering Advantages
- R134A Refrigerant: Environmentally compliant, non-ozone-depleting HFC refrigerant with stable thermodynamic performance across wide ambient ranges.
- Sealed Enclosure Design: Maintains NEMA/IP-rated enclosure integrity — no air exchange between inside and outside, protecting electronics from dust, moisture, and corrosive atmospheres.
- Self-Contained Refrigeration Circuit: Plug-and-play installation with no external chiller or cooling tower required.
- Compact Panel-Mount Form Factor: Optimized for side or top mounting on standard industrial enclosures with minimal footprint.
- Reliable Compressor Technology: Hermetically sealed compressor for long service life and low maintenance requirements.
- Wide Voltage Compatibility: Designed for industrial power supply standards (confirm exact voltage on datasheet).
System Architecture & Signal Flow
The 604521-L5D1-01 operates on a closed-loop vapor-compression refrigeration cycle:
- Evaporator (Internal Circuit): Absorbs heat from enclosure air; refrigerant evaporates and cools the internal airstream.
- Compressor: Hermetically sealed unit pressurizes refrigerant vapor for the condensation stage.
- Condenser (External Circuit): Rejects absorbed heat to the ambient environment via the external fan and coil assembly.
- Expansion Device: Meters refrigerant flow to maintain optimal evaporator performance.
- Thermostat / Control: Maintains setpoint temperature inside the enclosure; activates/deactivates compressor as required.
Internal and external airstreams are fully isolated — enclosure integrity is preserved at all times.
Sourcing & Quality Verification
- All units sourced through verified industrial distribution channels and OEM-authorized surplus networks.
- Each unit inspected for physical integrity, nameplate legibility, and refrigerant circuit condition prior to listing.
- Cross-reference numbers (9501F, DA02A-33110, 810-240888-002) verified against KOOLTRONIC OEM documentation.
- Traceability documentation available upon request for regulated industries.
- Konmask.com specializes in hard-to-find industrial automation and thermal management components with global shipping capability.
Procurement Process
- Submit Inquiry: Contact us via email or phone with your required quantity and delivery timeline.
- Quote & Lead Time: We confirm stock status, condition, and pricing within 1 business day.
- Order Confirmation: Purchase order or proforma invoice issued upon agreement.
- Inspection & Packaging: Unit inspected, photographed, and securely packaged for international freight.
- Shipping & Tracking: Dispatched via DHL / FedEx / sea freight with full tracking provided.
- After-Sales Support: Technical documentation and warranty terms provided with each shipment.
Technical FAQ
Q: Is the 604521-L5D1-01 compatible with my existing KOOLTRONIC mounting cutout?
A: The K2NA series uses standardized panel cutout dimensions. Please confirm your enclosure cutout size against the KOOLTRONIC K2NA datasheet or contact us with your enclosure model for verification.
Q: Can this unit operate in high-ambient temperature environments above 40°C?
A: KOOLTRONIC K2NA series units are rated for specific ambient temperature ranges. Contact us with your ambient conditions for derating guidance.
Q: Is R134A refrigerant still compliant with current environmental regulations?
A: R134A (HFC-134a) is non-ozone-depleting and widely used in industrial applications. Regulatory status varies by region — consult local environmental authority guidelines for your jurisdiction.
Q: Do you provide a warranty on surplus or refurbished units?
A: Yes. Warranty terms are specified per unit condition at time of sale. Contact us for details.
Q: Can you supply multiple units or provide volume pricing?
A: Yes. Volume pricing is available. Submit your RFQ to support@konmask.com with required quantity.
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