|
Cabinet Coolers™
|
What
are EXAIR Cabinet Coolers?
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.
Why
EXAIR Cabinet Coolers?
The
vortex tube incorporated in the EXAIR Cabinet Cooler Systems is
constructed of stainless steel. The wear, corrosion and oxidation
resistance of stainless steel assures long life and maintenance-free
operation of EXAlR Cabinet Cooler Systems.
|
|
|
|
How
the EXAIR Cabinet Cooler Works
Compressed air enters
the vortex tube powered Cabinet Cooler and is converted into two
streams, one hot and one cold. (For more details on the theory behind
vortex tubes, click
here.) 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.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 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:
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. |
Systems
for continuous operation include a Cabinet Cooler, distribution kit
and filter. |
|
Systems
with thermostat control include a Cabinet Cooler, thermostat, solenoid
valve, cold air distribution kit and filter. |
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.) |
|
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.
|
|
|
Inlet
Air Temperature:
Cabinet Cooler Systems provide a 50°F (28°C) temperature drop from
supply air temperature when the inlet pressure is 100 PSlG (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 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. |
|
|