The frame, 14 gauge, MIG welded tubular and formed steel, provides maximum support while 1" (25.4mm) deep steel panels with 1-1/2 lb. (.68 kg) insulation protect and quiet the system. The front door can be opened for service without shutting off the system. All components are accessible for service/ maintenance through the front of the unit.
Liebert enhances the Challenger 3000’s resistance to corrosion by applying a black, powder-coat finish to all frame components. Exterior panels are similarly protected with durable powder-coating.
The high voltage compartment contains the contac- tors, transformers and overloads and all other high- voltage components.
Each high voltage component is protected by a sepa- rate overcurrent protective device. The entire high voltage panel is enclosed by a safety lock dead front panel. When the front door is opened by operating personnel, the high voltage components remain enclosed for operator safety.
The Challenger 3000 features a quiet, low speed fan assembly with double inlet blower, lifetime lubrica- tion and self-aligning ball bearings. The motor and variable pitch drive are mounted on an adjustable base. The entire blower/ motor assembly is mounted on vibration isolators for smoother operation.
The draw-through design of the fan section provides even air distribution across the coil, controlled air for bypass humidification, elimination of air bypass around the filters and low internal cabinet pressure drop.
High-intensity quartz lamps over the stainless steel humidifier pan permit clean, particle-free vapor to be added to the air within 5 to 6 seconds of the elec- tronic call from the microprocessor control.
The quartz lamps provide radiant energy that evapo- rates water in a pure state, without solids.
The Infrared Humidifier is equipped with an auto- matic water supply system that significantly reduces cleaning maintenance. This system has an adjust- able water over-feed to prevent mineral precipita- tion. A drain valve is provided to easily empty the humidifier pan prior to inspection or servicing. A control valve regulates flow at water pressures between 5 and 150 psig (34.5 and 1034 kPa) and includes a Y-strainer.
The two-stage 304 stainless steel reheat elements are a rigid, fin-tubular design that have extended operation life. The reheat has ample capacity to maintain room dry-bulb conditions during a system call for dehumidification. The two stages give an accurate, controlled response to the requirements of the computer room. The low watt density, electrically enclosed elements are surrounded by the tube and fins, reducing sheath temperatures and eliminating ionization.
The standard pleated 2" (51mm) filter with an effi- ciency of 20% (based on ASHRAE 52.1) can be changed quickly and easily through the front of the unit.
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