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

The Integrity Series 21 NEMA 4/4X Air-Cooled Panel-Mounted Air Conditioners deliver robust thermal management for sensitive electronic enclosures while maintaining the highest standards of reliability and environmental responsibility. These units employ CFC-free R134a refrigerant to meet modern environmental regulations, and feature a closed-loop cooling design that completely isolates the dehumidified component compartment from ambient air and water, preventing contamination of critical equipment. The stainless steel 304-2B shell provides superior corrosion resistance in demanding environments, while a baked powder finish in ANSI 61 gray--with custom color options available--ensures long-lasting protection and professional appearance.

Intelligence built into the control system maximizes equipment longevity and minimizes operational noise. A compressor short cycle protector prevents damage from frequent starting cycles caused by low heat loads, power interruptions, or fluctuating internal conditions, significantly extending compressor life in installations subject to solar gain or variable equipment usage. The solid-state condenser impeller speed controller modulates fan speed based on coil temperature, reducing noise, eliminating unnecessary fan and compressor cycling, and preventing freeze-up conditions. All models include a programmable thermostat for precise temperature control and a programmable temperature alarm to alert operators when early intervention is needed.

Construction throughout emphasizes durability and serviceability. The fully gasketed design maintains NEMA 12, 3R, and 4/4X ratings per UL 50 for leakproof performance in harsh environments. Multi-layer corrugated aluminum filters with sturdy one-piece aluminum frames protect internal components from contamination, with replacement filters readily available through kooltronic.com/spareparts. All units are UL/CUL Listed, ensuring compliance with stringent safety and performance standards.