A dust and oil tight, splash resistant NEMA 4 Non Hazardous Purge Cabinet Cooler® System provides a slight positive pressure in the enclosure to keep contaminants from entering small holes or conduits. They are available with a thermostat control. Each of these systems will include a water-dirt filter separator to prevent water condensate and dirt from entering your enclosure and cold air distribution kit used to direct the air for circulation or on to hot spots. NEMA 4 (IP66) Cabinet Coolers are available in many cooling capacities for large and small control panels. All Cabinet Coolers are UL Listed and CE compliant. They 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.
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 Cabinet Cooler Systems must be mounted vertically.) 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 Cooler Systems have an aluminum construction. Those for NEMA 4 and 4X Cabinet Cooler Systems are Type 303 or Type 316 stainless steel.
EXAIR Cabinet Coolers are a low cost, reliable way to cool and purge electronic control panels. They provide air conditioning for the electrical enclosures, eliminating electronic control downtime due to heat, dirt and moisture! These panel cooling systems for enclosures incorporate a vortex tube to produce cold air from compressed air - with no moving parts.
The compact Cabinet Cooler is an easy to use air conditioner that 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.
Why EXAIR Cabinet Coolers?
When the electronics inside a control cabinet overheat, the machine can shut down due to tripped overloads and breakers or heat damage to the circuit boards. Unreliable cooling methods such as fans, heat exchangers, refrigerant air conditioners, and heat pipes are prone to failure as a result of mechanical wear, and clogged filters.
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.
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
They are the only compressed air powered coolers that are CE compliant
NEMA 4 (IP66) 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. They are constructed of aluminum with a 303 stainless steel vortex tube.
Thermostat control systems (Models 4804-4880) 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 4704-4780) include the cooler, a filter separator and cold air distribution kit.
ETC Thermostat control systems provide on the fly temperature adjustment and an internal temperature feedback display.
High Temperature Cabinet Cooler systems should be used when ambient temperatures reach 125°F to 200°F (52°C to 93°C).
Non-Hazardous Purge (NHP) models provide a continuous positive purge within the enclosure to prevent contaminants from entering. They are suited for extremely dirty and dusty environments.
Dual Cabinet Cooler systems (Models (##50-##80) provide for additional cooling.
Compressed air enters the vortex tube powered Cabinet Cooler and is converted into two streams, one hot and one cold. 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.
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.
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. The NEMA 12 (IP54) Cabinet Coolers may be mounted on the top or side of the panel. Side Mount Kits are available. (Model 4909 - Small; Model 4910 - Large.) NEMA 4 and 4X (IP66) 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; Model 4907 - Large).
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. The thermostat is factory set at 95°F (35°C). It will normally hold ±2°F (1°C) inside the cabinet. Solenoid valves are available in 120V, 60Hz; 110V, 50Hz; 240V, 50/60Hz and 24VDC. All solenoids are CSA Certified and UL Listed or Recognized.
ETC units are available in four different models.
Electronic Temperature Control:
EXAIR’s digital ETC™ (Electronic Temperature Control) provides precise temperature control for your electrical enclosure. It can accurately maintain a constant temperature that is slightly under the maximum rating of the electronics, permitting just enough cooling for the electronics without going so cold as to waste compressed air.
The LED readout of the ETC displays the internal temperature of the electrical enclosure (°F or °C) that is constantly being monitored by a quick response thermocouple. The control activates the solenoid valve (included) when the temperature setting is exceeded. The polycarbonate plastic enclosure of the ETC is suitable for NEMA 12, 4 and 4X environments. (Cabinet Cooler not included.)
Sample Rate
Max Temp
Solenoid Valve
Setting Temp
Supply Current
Sensor
Model 9238 120VAC, 50-60 Hz
1/sec.
158°F (70°C)
1/4 NPT
Push Button
250 mA max
Type J Thermocouple
Model 9258 120VAC, 50-60 Hz
1/sec.
158°F (70°C)
1/2 NPT
Push Button
325 mA max
Type J Thermocouple
Model 9239 240VAC, 50-60 Hz
1/sec.
158°F (70°C)
1/4 NPT
Push Button
165 mA max
Type J Thermocouple
Model 9259 240VAC, 50-60 Hz
1/sec.
158°F (70°C)
1/2 NPT
Push Button
215 mA max
Type J Thermocouple
ETC controls are available within Cabinet Cooler Systems or separately for retrofitting on existing coolers. ETCs are RoHS and CE compliant.
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.
Environmental Considerations
NEMA 12 (IP54) Cabinet Coolers (dust-tight, oil-tight) are ideal for general industrial environments where no liquids or corrosives are present.
NEMA 4 (IP66) 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 (IP66) Cabinet Coolers (corrosion resistant) offer the same protection as NEMA 4, but are constructed of stainless steel for food service, pharmaceutical and corrosive environments.
