Guardian DP43 NEMA 12, 3R & 4Air-Cooled Panel-Mounted Air Conditioners

The Guardian DP43 is a heavy-duty, panel-mounted air conditioning unit designed to maintain precise temperature control within NEMA 12, 3R, and 4 rated electrical enclosures. Its baked powder-coat finish in ANSI 61 gray provides robust protection against industrial environments, with custom color options available to match facility aesthetics or specifications.

This unit employs a closed-loop cooling system that isolates the enclosure interior airflow from ambient conditions, preventing unconditioned air from infiltrating the protected component compartment and ensuring consistent dehumidification of sensitive electronics. The built-in condensate evaporator eliminates routine drainage requirements under normal operating conditions, while an overflow drain fitting and hose are included for installations in high-humidity environments. CFC-free R134a refrigerant delivers efficient cooling while meeting environmental regulations. The epoxy-coated condenser and evaporator coils provide extended service life in corrosive environments, withstanding 1000 hours of salt spray per ASTM B 117 standards, making the unit suitable for challenging operational settings such as coastal installations or industrial facilities. A multi-layer corrugated aluminum filter protects internal components from contamination, with replacement filters readily available online.

The Guardian DP43 incorporates advanced protection and control features that extend equipment life and reduce operational costs. A compressor short-cycle protector prevents damage from frequent restarts caused by fluctuating heat loads or power interruptions, significantly extending compressor longevity--particularly valuable in installations with variable internal loads or solar exposure. A solid-state condenser impeller speed controller automatically adjusts fan speed based on coil temperature, reducing noise, minimizing compressor cycling, and preventing freeze-up conditions. Programmable thermostat and temperature alarm functions provide precise temperature management and early warning of thermal issues. The unit is supplied with a six-foot three-wire power cord, is fully gasketed to maintain NEMA ratings, and carries UL/CUL listing and CE compliance certifications for global deployment.