Desco SPI 94030 Installation Manual

TB-5510 December 2008 Page 1 of 2

Overhead Ionizer
Installation, Operation, and Maintenance

ESD Systems.com • 432 Northboro Road Central • Marlboro, MA 01752 • [phone] • Fax [phone] • Website: ESDSystems.com

TECHNICAL BULLETIN TB-5510

Made in America

© 2008 DESCO INDUSTRIES INC.

Employee Owned

Figure 1. SPI Overhead Ionizer

Description

The SPI 94030 (120V) / 94031 (220V) 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.

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 Overhead Ionizer 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.

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.

NOTE: The AC power cord MUST be disconnected before
the unit is disassembled for maintenance. The emitter
electrodes should be cleaned using the alcohol cleaners
included or a swab wet with Isopropyl alcohol. First, turn
the unit OFF and unplug the power cord. Then remove the
back cover by disengaging the 4 screws on back. After
cleaning the emitter electrodes, reattach the back cover
using the 4 screws. Plug in the power cord and turn the
unit back ON.

Limited Warranty

SPI expressly warrants that for a period of one (1) year from the
date of purchase, SPI Overhead Ionizers will be free of defects in
material (parts) and workmanship (labor). Within the warranty
period, the product will be tested, repaired, or replaced at our
option, free of charge. Call our Customer Service Department at
909-664-9986

for a Return Material Authorization (RMA) and
proper shipping instructions and address. Include a copy of your
original packing slip, invoice, or other proof of purchase date. Any
unit under warranty should be shipped prepaid to the SPI factory.
Warranty repairs will take approximately two weeks.

If your unit is out of warranty, call Customer Service at

909-664-

9986

for a Return Material Authorization (RMA) and proper
shipping instructions and address. SPI will quote repair charges
necessary to bring your unit up to factory standards.

Warranty Exclusions

THE FOREGOING EXPRESS WARRANTY IS MADE IN LIEU
OF ALL OTHER PRODUCT WARRANTIES, EXPRESSED AND
IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS
FOR APARTICULAR PURPOSE WHICH ARE SPECIFICALLY
DISCLAIMED. The express warranty will not apply to defects or
damage due to accidents, neglect, misuse, alterations, operator
error, or failure to properly maintain, clean or repair products.

Limit of Liability

In no event will SPI or any seller be responsible or liable for any
injury, loss or damage, direct or consequential, arising out of the
use of or the inability to use the product. Before using, users
shall determine the suitability of the product for their intended
use, and users assume all risk and liability whatsoever in
connection therewith.

TB-5510 Page 2 of 2

ESD Systems.com • 432 Northboro Road Central • Marlboro, MA 01752 • [phone] • Fax [phone] • Website: ESDSystems.com

© 2008 DESCO INDUSTRIES INC.

Employee Owned

The emitter electrodes should not require replacement
during the life of the unit with normal handling.
Replacement emitter electrodes can be ordered if
necessary.

Best practice would be to verify the balance of the unit with
a charge plate monitor after cleaning.

Neutralization (Decay) Times

The comparative efficiency of benchtop ionizers is
determined by a standard test published by the ESD
Association: Standard S3.1. Typical positive and negative
decay times (from 1000 volts to 100 volts) measured using
this standard are shown below. The performance of the
ionizer was measured with the unit positioned as shown,
with the fan speed on high, and without a filter.

Mounting

Hanging apparatus attached to ceiling.

Ozone

Less than 0.05ppm

Weight

10 pounds

NOTE: Unauthorized servicing or modifications to your
ionizer will void the product warranty and may create
dangerous conditions. Servicing should be performed only
at the factory, or by a SPI approved technician.

Figure 2. Neutralization (Decay) Times

Note: Reference ESD STM 3.1-2000. The distance from
the Overhead Ionizer to the charge plate is 18". (Readings
are typical and taken at maximum fan speed.)

Specifications

Air Flow

Three speed fans (125fpm -250fpm; 50-100cfm).

Balance

±10 volt, typical; ±20 volts maximum.
(Temperature range: 65°F to 80°F, R.H.: 15% to 65%)

Chassis

White powder coated steel housing.

Dimensions

3.5" H x 6.5" W x 37" L (8.9cm H x 16.5cm W x 94.0cm L)

Emitter Points

.050" diameter pure tungsten for improved mechanical
strength and ionization stability.

Fuse

400mA slow blow.

High Voltage Power Supply

5.5 KV DC nominal.

Input Power

AC line power, internally selectable for 110/115 VAC­50/60Hz or 220/230 VAC-50/60Hz.

Ion Emission

Steady state DC with sense feedback.