Integrity Series 21 NEMA 4/4X SwitchableAir-Cooled Panel-Mounted Air Conditioners

The Integrity Series 21 NEMA 4/4X Switchable Air-Cooled Panel-Mounted Air Conditioner is a robust climate control solution engineered for demanding industrial environments where reliable temperature management and enclosure protection are critical. Fully compliant with NEMA 4/4X ratings and UL/CUL Listed, this unit maintains a completely gasketed, leakproof seal that protects sensitive electronics from moisture, dust, and environmental contaminants while delivering consistent cooling performance.

The system features an intelligent condenser impeller speed controller that uses a solid-state sensor to modulate fan speed based on coil temperature, significantly reducing operational noise, fan cycling, and compressor cycling while preventing freeze-up conditions. A built-in condensate evaporator eliminates the need for manual draining under normal operating conditions, though an overflow drain fitting and hose are included for installations in extremely high-humidity or compromised enclosures. The CFC-free R134a refrigerant meets environmental standards, while an EMI/RFI suppressor minimizes transient line spikes during on/off cycling for protection of sensitive control circuits. The electronic thermostat with low temperature control prevents over-cooling and optimizes energy efficiency across varying load conditions.

For enhanced durability in corrosive or chemically aggressive environments, the Integrity Series 21 offers stainless steel shell construction and internal corrosion protection featuring an air-cured coating on all brazed refrigeration joints rated for 1000 hours of salt spray per ASTM B 117. Internal corrosion protection is standard on NEMA 4X models and available as an upgrade on NEMA 4 units. Multi-layer corrugated aluminum filters with sturdy one-piece frames keep internal components clean and are readily available for replacement through Kooltronic's online spare parts ordering system. Consult the factory regarding warranty considerations and protection recommendations for severe operational environments such as wastewater treatment facilities or persistent salt spray applications.