INTRODUCTION
EXAIR’s ATEX Cabinet Cooler System cools electronic cabinets using compressed air through a vortex tube to remove
up to 2,800 BTU/HR of heat. The ATEX Cabinet Cooler is not itself a purged and pressurized control system, is not a part
of the controller and should not be relied upon nor used in place of a purged and pressurized controller. The ATEX
Cabinet Cooler System must be used in conjunction with a properly sized purged and pressurized enclosure that must be
able to vent the additional air introduced to the cabinet by the Cabinet Cooler. EXAIR does not supply purge or
pressurization systems. The vent supplied with purge system will need to be properly sized to vent the additional cool air
produced by the ATEX Cabinet Cooler System to prevent over-pressurization of the cabinet.
EXAIR ATEX Cabinet Coolers ATEX ZONE 2 AND 22 CERTIFIED.
COMPRESSED AIR LINE SIZES
Compressed air lines should be sized to hold pressure drops to a minimum. When installing supply lines, use 1/4" pipe for
runs up to 10' (3m). Use 3/8" pipe for runs up to 50' (15.2m), and 1/2" pipe for runs over 50' (15.2m). If using compressed
air hose, consider 3/8" I.D. hose to be the same as 1/4" pipe and 1/2" I.D. hose to be the same as 3/8" pipe. Do not use
restrictive fittings such as quick connects. They can “starve” the ATEX Cabinet Cooler by causing excessive line pressure
drop.
COMPRESSED AIR SUPPLY
With proper filtration and separation of dirt, moisture and oil from the compressed air supply, the ATEX Cabinet Cooler
will run for years with no maintenance required. Pressurized air supply provided to the Cabinet Cooler must be the same
quality (free of contaminants, instrument quality, compressor intake in unclassified location) as the air used in the purge
and pressurize the enclosure it is installed on. Filtering for contaminants and separation of moisture is required for all
ATEX Cabinet Coolers.
All ATEX Cabinet Cooler Systems include an Automatic Drain Filter Separator which provides 5-micron filtration. The
automatic drain is float actuated to eliminate the possibility of passing water into the enclosure, even during continuous
operation. (Impulse-type automatic drains must not be used. They may allow water to pass through the filter during
continuous operation.)
To prevent problems associated with oil, use an oil removal filter (Model 9005 Oil Removal Filter not included). The oil
removal filter should be used downstream from the automatic drain filter separator. Filters should be used close to each
ATEX Cabinet Cooler, within 10 to 15' (3 to 4.6m) is best.
Both the filter separator and oil removal filters should be located in a non-hazardous area, so that the filter can be changed
without introducing hazardous substances to the enclosure through the plumbing.
ATEX Cabinet Coolers are designed to use normal shop air supplies of 80 to 100 PSIG (5.5 to 6.9 BAR). Thermostat
control can minimize compressed air usage and should be used whenever possible.
USING THE ATEX CABINET COOLER
The ATEX Cabinet Cooler is suitable for ZONES 2 AND 22.
CE Ex II 3 G Ex h IIC T3 Gc
CE Ex II 3 D Ex h IIIC 200°C Dc
Install in accordance with applicable local code. Do not operate the cooler until the purge system on the enclosure
completed its initial cycle and a proper safe environment is created.
Note: The ATEX classification only applies to the Cabinet Cooler itself. The solenoid is separately ATEX certified. The
accessories (filter, cold air distribution kit and thermostat) are not ATEX certified.
The ATEX Cabinet Cooler mounts to the enclosure thru a 1-15/16" (49mm) 1-1/2" NPS diameter hole. A nut is supplied
to lock it in place. The ATEX Cabinet Cooler should be mounted on the top only (vertically). Side mounting is possible
with use of a Model 4907 90° Side Mount Kit. After mounting to the ATEX Cabinet Cooler, connect the Model 4902
muffler to the cold outlet of ATEX Cabinet Cooler. Disassembly is opposite of installation. Remove Model 4902 muffler
from the cold end. Unthread the nut on the bottom of the ATEX Cabinet Cooler and remove the ATEX Cabinet Cooler
from the cabinet.
