Cabinet Coolers^®

Stop electronic control downtime due to heat, dirt and moisture!

Cabinet Coolers maintain NEMA 12, 4 and 4X integrity and are

What are EXAIR Cabinet Coolers?
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EXAIR Cabinet Coolers are a low cost, reliable way to cool and purge electronic control panels. EXAIR Cabinet Coolers incorporate a vortex tube to produce cold air from compressed air - with no moving parts. The compact Cabinet Cooler can be installed in minutes through a standard electrical knockout. NEMA 12, 4 and 4X Cabinet Coolers that match the NEMA rating of the enclosure are available in many cooling capacities for large and small control panels.

A Model 4830 NEMA 4 Cabinet Cooler cools a panel
with 20°F (-7°C) air while keeping the inside dry.

Why EXAIR Cabinet Coolers?
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The vortex tubes incorporated in the EXAIR Cabinet Cooler Systems are constructed of stainless steel. The wear, corrosion and oxidation resistance of stainless steel assures long life and maintenance-free operation. All EXAIR Cabinet Coolers are UL Listed.

Cabinet Coolers are compact like this Model 4608
NEMA 4 measuring only 5" (127mm) high.

Applications
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How Cabinet Coolers Work
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Compressed air enters the vortex tube powered Cabinet Cooler and is converted into two streams, one hot and one cold. (For more information on vortex tube operation, see Vortex Tubes.) Hot air from the vortex tube is muffled and exhausted through the vortex tube exhaust. The cold air is discharged into the control cabinet through the cold air distribution kit. The displaced hot air in the cabinet rises and exhausts to atmosphere through the cabinet air exhaust at a slight positive pressure. Thus, the control cabinet is both cooled and purged with cool, clean air. Outside air is never allowed to enter the control panel.

Selecting the Right Cabinet Cooler Model
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EXAIR Cabinet Coolers are available with or without thermostat control. The continuous coolers (Model 4200 and 4700 series) are recommended when constant cooling and a constant positive purge are desirable. The thermostatically controlled systems (Model 4300 and 4800 series) save air by activating the cooler only when internal temperatures approach critical levels. The adjustable thermostat is factory set at 95°F (35°C). Thermostatic systems are recommended where heat load fluctuates and continual purge is not required.

All EXAIR Cabinet Cooler Systems contain a 5 micron, Automatic Drain Filter for the compressed air supply and a Cold Air Distribution Kit to circulate the cold air throughout the enclosure. See below for more details.

Heat Can Stop Your Machines

It happens when you least expect it. High temperatures can cook the electronics that control your machines, resulting in erroneous readings, trip-outs or fried circuit boards. Cooling the electrical cabinet can eliminate these problems, but how will you do it?

A dangerous shock hazard exists when the
panel door is opened to let a fan blow hot,
dirty shop air at the electronics.

Heat Exchangers and Pipes

These have serious limitations when it comes to summer time heat. In many cases, the temperature of the hot plant on a summer day is close to that inside the enclosure. There is not enough difference in temperature for a decent heat exchange.

Refrigerant Panel Air Conditioners

These coolers are expensive, take almost a day to install, and are prone to failure when dust and dirt clogs the filter. Vibration from machinery contributes to component failures and loss of freon. Life expectancy for most compressors is rated at 2.5 years of continuous operation. Average replacement cost for a bad compressor is $750 plus installation. Often, a floor drain is not readily available for the condensation tube.

EXAIR Cabinet Coolers^®

Our compressed air operated Cabinet Coolers are the low cost solution. NEMA 12, 4 and 4X models are available that are very compact and mount in just minutes through an ordinary electrical knockout. Thermostat control limits compressed air use by operating the Cabinet Cooler only when the temperature inside the enclosure reaches critical levels.

Heat exchangers, heat pipes and refrigerant coolers all have filters that can clog. Left unattended, mechanical failure of the cooler is likely. And, the expensive equipment in the electrical enclosure can malfunction, overheat and shut down the entire machine or process. EXAIR Cabinet Coolers have no moving parts to wear out and do not require constant monitoring. All models are UL Listed and available in a large number of styles and cooling capacities.

Environmental Considerations
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NEMA 12 (IP52) Cabinet Coolers (dust-tight, oil-tight) are ideal for general industrial environments where no liquids or corrosives are present.

NEMA 4 (IP56) Cabinet Coolers (dust-tight, oil-tight, splash resistant, indoor/outdoor service) incorporate a low pressure relief valve for both the vortex tube and cabinet air exhaust. This valve closes and seals when the cooler is not operating, to maintain the integrity of a NEMA 4 enclosure.

NEMA 4X (IP56) Cabinet Coolers offer the same protection as NEMA 4 but are constructed of stainless steel for food service and corrosive environments.

Specifications
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Special Cabinet Coolers
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EXAIR manufactures special NEMA 4, 4X and 12 Cabinet Coolers suited to specific environmental requirements.

High Temperature Cabinet Coolers (shown top right) for ambients of 125° to 200°F (52° to 93°C) are available. Internal components can withstand high temperatures (like those near furnaces, ovens, etc.).

The Non-Hazardous Purge Cabinet Cooler Systems (shown middle right) are ideal for dirty areas where contaminants might normally pass through small holes or conduits. Under normal conditions, the NHP Cabinet Cooler Systems provide a slight positive pressure in the enclosure by passing 1 SCFM (28 SLPM) of air through the cooler, when the solenoid valve is in the closed position. When the thermostat detects high temperature, it energizes the solenoid valve to pass full line pressure to the Cabinet Cooler, giving it full cooling capability.

Type 316 Stainless Steel NEMA 4X Cabinet Coolers (shown bottom right) are suitable for food service, pharmaceutical, harsh and corrosive environments, and other applications where 316SS is preferred. Capacities from 650 to 2800 Btu/hr. (164 to 706 Kcal/hr.) are available.

Dual Cabinet Cooler Systems
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EXAIR's Dual Cabinet Cooler Systems are ideal for large electrical enclosures and high heat loads. Dual Cabinet Coolers are available with cooling capacities of 4,000, 4,800 and 5,600 Btu/hr. Dual Cabinet Cooler Systems are available in NEMA 12, 4, and 4X models. For more information, contact your distributor.

Cold Air Distribution Kit

Cold Air Distribution Kit: The kit includes a length of flexible vinyl tubing used to direct the cold air for circulation, or to hot spots. Tubing connectors and adhesive backed clips to hold the tubing in place are provided.

Filtration: EXAIR Cabinet Cooler Systems include a 5 micron automatic drain water and dirt filter. This filter is critical for protection of electronics from water in the compressed air line. If oil is present in the compressed air, a coalescing (oil removal) filter, such as EXAlR Model 9005 is recommended.

Humidity: For a continuous operating Cabinet Cooler, relative humidity inside the enclosure stabilizes at 45%. No moisture condenses inside the enclosure. (The enclosure must be sealed to prevent condensation.)

Inlet Air Temperature: Cabinet Cooler Systems provide a 50°F (28°C) temperature drop from supply air temperature when the inlet pressure is 80 PSIG (5.5 BAR). Elevated inlet temperature will produce a corresponding rise in cold air temperature and reduction in cooling capacity. Low air pressures will also reduce the cooling capacity.

Mounting: The Cabinet Cooler mounts to the enclosure through a drilled hole or electrical knockout. The NEMA 12 Cabinet Coolers may be mounted on the top or side of the panel. NEMA 4 and 4X Cabinet Coolers must be mounted on the top of the panel, or on the side of the panel using our new side mount kits.

Solenoid Valve and Thermostat: Cabinet Cooler Systems with thermostat control include a solenoid valve and thermostat that limit the flow of compressed air to only when cooling is needed. The solenoid valve is rated 120V, 60 Hz or 110V, 50 Hz. It is UL Listed, CSA Certified.

The thermostat is factory set at 95°F (35°C). It will normally hold ±2°F (1°C) inside the cabinet. It is rated 120V, 50/60 Hz and is UL Recognized, CSA Certified

.

Electronic Temperature Control

Electronic Temperature Control
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EXAIR's ETC (Electronic Temperature Control) delivers precise temperature control for your enclosure. Temperature is maintained with an accuracy of ±1°F of the dial setting. The digital readout monitors the internal temperature of the electrical enclosure and activates the solenoid valve (included) only when the temperature setting is exceeded. The ABS/PC plastic enclosure of the ETC is suitable for NEMA 12, 4 and 4X environments. (Cabinet Cooler not included.)

Contact your distributor to purchase these
Side Mount Cabinet Cooler Kits.

Side Mount Cabinet Cooler Kits
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EXAIR's new Side Mount Kits make mounting on the side of an electrical enclosure possible when there is limited space on the top or side. (NEMA 4 and 4X Cabinet Coolers must be mounted vertically.) The Side Mount Kits maintain the NEMA rating of large and small NEMA Type 12, 4 and 4X enclosures. They mount in a standard electrical knockout (1-1/2 NPS). Side Mount Kits for NEMA 12 Cabinet Coolers have an aluminum construction. Those for NEMA 4 and 4X Cabinet Coolers are Type 303 stainless steel.

The Side Mount Kits are suitable for use on large or small electrical enclosures with Cabinet Coolers that have cooling capacities up to 2800 Btu/hr.

Installation and Maintenance Sheets
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These files are in the Adobe .PDF format.
The viewer is free and is available at
www.adobe.com.

Small NEMA 12 Cabinet Cooler
Large NEMA 12 Cabinet Cooler
High Temperature NEMA 12 Cabinet Cooler

Small NEMA 4-4X Cabinet Cooler
Large NEMA 4-4X Cabinet Cooler
High Temperature NEMA 4-4X Cabinet Cooler

Non Hazardous Purge Small NEMA 12
Non Hazardous Purge Large NEMA 12
Non Hazardous Purge Small NEMA 4-4X
Non Hazardous Purge Large NEMA 4-4X

ETC (Electronic Temperature Control)
Model 4907 90 Degree Mounting Kit
Model 4908 Dual Cabinet Cooler Installation Kit
Model 4519 Capacitor