NEMA 4 Hazardous Loc Cabinet Cooler® Systems

Applications

• Programmable controllers
• Line control cabinets
• Motor control centers
• Relay panels
• NC/CNC systems
• Modular control centers
• CCTV cameras
• Computer cabinets
• Laser housings
• Electronic scales

NEMA 4 Cabinet Cooler Advantages

• Rated for Div I Hazardous Locations
• UL Classified
• Available in 8 different cooling capacities
• No moving parts - maintenance free
• Thermostat control reduces operating cost
• Large cooling capacities up to 5,600 Btu/hr. (1,641 Watts)
• 5 Year warranty

Side Mount Kits

EXAIR's 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 HazLoc Cabinet Cooler Systems must be mounted vertically.) Side Mount Kits maintain the NEMA rating of large and small NEMA Type 4, and 4X enclosures. They mount in a standard electrical knockout (1-1/2 NPS) and are constructed of Type 303 or Type 316 stainless steel.

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?

Fans

Opening the panel door and aiming a fan at the circuit boards is a bad idea.

• It is an OSHA violation that presents a shock hazard to personnel
• The fan blows hot, humid, dirty air at the electronics
• The cooling effect is minimal
• It is likely to fail again since the environment is still hot

Heat Exchangers and Heat Pipes

These have serious limitations. On hot summer days when the temperatures of the room and inside the enclosure are about equal, there’s not enough difference for effective heat exchange.

• They fail when dust and dirt clog the filter
• The cooling capacity is limited due to ambient conditions

Refrigerant Panel Air Conditioners

These coolers are prone to failure in dirty, industrial environments when dust and dirt clogs the filter.

• It takes almost a day to install
• Vibration from machinery causes refrigerant leaks and component failures
• Compressor life expectancy is typically 2.5 years of continuous operation
• It requires a floor drain for the condensation
• Thermostat control can decrease compressor life
• Average cost for replacing a bad compressor is $750

EXAIR Cabinet Cooler Systems

EXAIR has a complete line of Cabinet Cooler Systems to dependably cool and purge your electrical enclosures. They convert an ordinary supply of compressed air into clean, cold 16ºF (-9°C) air. They mount in minutes through an ordinary electrical knockout and have no moving parts to wear out. Compressed air filtration is provided that keeps water, oil and other contaminants out of the enclosure.

• There is no room air filter to clog
• An accurate electrical thermostat control minimizes compressed air use
• All Cabinet Coolers are UL Listed to US and Canadian safety standards
• All HazLoc Cabinet Coolers are UL classified for use with classified enclosure purge and pressurization systems
• They are the only compressed air powered coolers that are CE compliant

What is a Hazardous Location Cabinet Cooler System?

HazLoc Cabinet Cooler Systems are engineered and approved for use upon purged electrical enclosures (not included) found within classified areas. The areas approved are Class I Div 1, Groups A, B, C and D – Class II Div 1 Groups E, F and G - and Class III. EXAIR’s HazLoc Cabinet Cooler Systems have been tested by UL and meet the stringent UL requirements for these areas. Cabinet Cooler systems are a low cost and reliable way to cool purged electric control panels found within these environments. They utilize vortex tube technology to produce up to 5,600 Btu/Hr, with no moving parts, which additionally creates a low maintenance solution for cooling your HazLoc purged cabinets.

The compact Cabinet Cooler is an easy to use air conditioner that can be installed in minutes through a standard electrical knockout. NEMA 4 and 4X HazLoc Cabinet Coolers that match the NEMA rating of the enclosure are available in many cooling capacities for large and small control panels.

Why EXAIR HazLoc Cabinet Coolers?

EXAIR’s HazLoc Cabinet Cooler Systems have been set apart from the competition by achieving the UL classified designation for Div I environments. Thermostatically controlled systems are recommended for the highest efficiency and include UL listed solenoids, also for hazardous environments. EXAIR Cabinet Cooler Systems will install upon your purged enclosure in minutes, require little to no maintenance and operate under the toughest of industrial conditions. If you require low cost, ease of use and/or reliability – a HazLoc Cabinet Cooler System will meet your needs.

EXAIR Hazardous Location Cabinet Cooler Systems are available in 8 different cooling capacities from 1,000 Btu/Hr. to 5,600 Btu/Hr. This range of cooling allows for choosing the best fit for your cooling needs without wasting compressed air.

Cabinet Cooler Systems protect your electronics from heat, dirt and moisture and keep your processes running. They are the low-cost solution to messy, high maintenance coolant-based air conditioners with simple installation. With modern technology comes an increased number of small electronic components packed into smaller electronic cabinets. This creates a high internal heat load which increases failures due to heat. Components will fail, sensors will misread, controls can drift and displays become inaccurate. EXAIR HazLoc Cabinet Coolers can solve these problems and prevent lost productivity, shutdown and the expense of new components.

Safety

EXAIR's HazLoc Cabinet Cooler Systems are not purged and pressurized control systems and should not be relied upon nor used in place of a purged and pressurized controller. They are meant for use in conjunction with a purged and pressurized control system.

Any control systems and accessories not rated for the hazardous location need to be moved outside of the hazardous area or inside a properly purged and pressurized enclosure which is suitable for the hazardous area.

Thermostat Control

Each different HazLoc Cabinet Cooler System is available with a thermostat control or as a continuous operation system. Each of these systems will include a water-dirt filter separator to prevent water condensate and dirt from entering your enclosure and a cold air distribution kit used to direct the air for circulation and onto hot spots. HazLoc Cabinet Cooler Systems are also available in Type 303 and Type 316SS for highly corrosive environments.

EXAIR Cabinet Coolers provide cold air for large and small control panels and are maintenance free. They have no moving parts to wear out. All Cabinet Coolers are UL, ULC Listed and/or CE compliant and have a five year “Built To Last” warranty.

NEMA 4 (IP66) HazLoc Cabinet Coolers

NEMA 4 (IP66) HazLoc Cabinet Cooler systems are dust and oil tight, splash resistant and indoor/outdoor capable. By incorporating a low pressure valve for all air exhaust, the valve closes and seals when not operating to maintain NEMA 4 enclosure integrity.

Thermostat control systems (Models HZ4815-HZ4880) are the most efficient system because it will turn itself on and off as needed to cool your enclosure. Includes cooler, solenoid valve and thermostat, filter separator and cold air distribution kit. Models are available in 110VAC, 240VAC and 24VDC.

Continuous operation systems (Models HZ4715-HZ4780) include the cooler, a filter separator and cold air distribution kit.

Dual Cabinet Cooler systems (Models HZ##50-HZ##80) provide for additional cooling.

Other Considerations

Systems for continuous operation include a Cabinet Cooler, cold air distribution kit and filter.

Systems with thermostat control include a Cabinet Cooler, thermostat, solenoid valve, cold air distribution kit and filter.

Any control systems or accessories not rated for the hazardous location need to be moved outside of the hazardous area or inside a properly purged and pressurized enclosure which is suitable for the hazardous area.

Filtration:

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

Cold Air Distribution Kit includes tubing, adhesive clips and fittings.

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.

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 54°F (30°C) temperature drop from supply air temperature when the inlet pressure is 100 PSIG (6.9 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. Side Mount Kits are available. NEMA 4 and 4X (IP66) Hazardous Location Cabinet Coolers may be mounted on the top of the panel or on the side of the panel if a Side Mount Kit is used (Model 4906 - Small Side Mount Kit; Model 4907 - Large Side Mount Kit).

Solenoid Valve and Thermostat

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. Solenoid valves are rated 120V, 60Hz; 110V, 50Hz; 240 VAC or 24VDC. It is UL Listed and CSA Certified.

 

HazLoc Cabinet Cooler Systems with thermostat control include a Hazloc Solenoid NEMA 4X/7/9, 1/4 NPT Solenoid Valve that limits the flow of compressed air to only when cooling is needed. The solenoid valve is rated 120V/60HZ, 240V/60HZ or 24VDC. It is UL Classified.

 

The thermostat is factory set at 95°F (35°C). It will normally hold ±2°F (1°C) inside the cabinet. It is rated 24VAC-240VAC, 50/60Hz, 24VDC and is UL Recognized and CSA Certified.

Selecting The Right Cabinet Cooler® System

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

With or Without Thermostat Control

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.

Cabinet Cooler® Sizing Guide!

Use our Cabinet Cooler Sizing Guide to submit information online about your control panel cooling problem. Download a PDF version, complete it offline and fax it to us at (513) 671-3363. 

For immediate help, call our Application Engineering Department at 1-800-903-9247.