Operation
Set the fan speed switch on the rear of the unit to the LOW,
MED, or HI position. Higher airflow will result in faster
neutralization rates. Position the unit so that the maximum
airflow is directed at the items or area to be neutralized.
Turn the unit ON.
When the unit is first turned on, it conducts a self-test. The
audible alarm will sound and then the LED will cycle through
RED, YELLOW, and then GREEN. The LED will remain
GREEN during normal operation.
Balance Adjustment
The 50680/50681 is an auto-balancing unit. However,
tuning or manual adjustment can be accomplished by
inserting a small screwdriver or trimmer adjustment tool into
the balance adjustment hole located on the front of the unit.
To increase the output in a positive direction, turn the
potentiometer in a clockwise direction. Conversely, to
increase the output in a negative direction, turn the
potentiometer in a counter clockwise direction. Once the
desired balance point has been achieved, the alarm reset
button must be pressed to set the balance point.
Maintenance / Alarms
It the supply voltage drops from 110 Volts to below 85 Volts
or from 220 Volts to below 170 Volts, the unit will shut down,
the audible alarm will beep, and the LED will blink RED.
The unit will automatically reset when the minimum voltage
is restored.
Under normal conditions, the ionizer will attract dirt and dust
(especially on the emitter electrodes). To maintain optimum
neutralization efficiency and operation, cleaning should be
performed on a regular basis.
If the performance of the ionizer were to degrade because
of dirty or corroded points, the unit will enter a maintenance
condition. When the ionizer is in a maintenance condition,
the LED on the front of the unit will blink alternately
YELLOW and RED; the audible alarm will sound. If the
performance continues to degrade, the unit will enter
shutdown mode.
When the unit enters shutdown mode, ionization will be
stopped, the LED on the front of the unit will change to a
steady RED, and the audible alarm will sound continuously.
If the ionizer enters shutdown mode, it must be turned OFF
and then back ON to reset the unit.
Figure 1. Desco Emit Overhead Ionizer
Description
The Model 50680/50681 is a three fan, dual steady state
DC auto-balancing overhead ionizer. The unit is normally
hung from the ceiling above the area to be neutralized. The
ionizer's neutralization time will be best approximately 24" to
48" directly above the work surface and will increase as the
distance from the unit increases.
Installation
Remove the ionizer from the carton and inspect for
damage. Included with the unit should be:
1. Hanging kit
2. Power cord
3. Emitter point cleaner
The input voltage should be set to your specification prior to
shipping. It can be verified or reset by removing the top of
the case by disengaging the 4 screws. NOTE: The AC
power cord MUST always be disconnected before the unit
is disassembled.
Input voltage is selected with the two internal jumpers on
JH1. For 110 volt jumper setting, a jumper must be in place
shorting pin 1 to 2 and another shorting pin 3 to 4. For 220
volt jumper setting, a single jumper must be in place
shorting pin 2 to 3 only.
Before installing the unit, verify that the AC outlet is properly
connected to earth ground. The unit must have a good
earth ground to maintain proper balance. Install the unit in
the desired location, making sure that the airflow will not be
restricted. Be sure the ON/OFF switch, located on the rear
of the unit, is in the "OFF" position. Plug the power cord
into the unit and then into the appropriate AC power source.
Status of the unit can be monitored remotely via the RS485
data ports. Please contact the factory for the necessary
polling utility.
TB-6545
12/06 Page 1 of 2
Overhead Ionizer
Installation, Operation, and Maintenance
Made in America
TECHNICAL BULLETIN TB-6545
© 2006 DESCO INDUSTRIES INC.
Employee Owned
DESCO EMIT WEST
- 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178 • Fax (909) 627-7449
DESCO EMIT EAST
- 90 Hudson Road, Canton, MA 02021-1407 • (781) 821-8370 • Fax (781) 575-0172 • DescoEMIT.com
