6
VII. PERIODIC MAINTENANCE AND
TROUBLESHOOTING
The following sections are for the use of trained service
personnel only.
WARNING — THE FOLLOWING PROCEDURES WILL
EXPOSE HAZARDOUS LIVE AND MOVING PARTS. DIS-
CONNECT AIR CLEANER BEFORE PROCEEDING.
All SMOKEETER/CRYSTAL-AIRE air cleaners are
manufactured to give years of trouble-free
performance. As with any piece of equipment,
however, breakdowns can occur. Due to the
simplicity of design, breakdowns are restricted to
these components:
— the air mover*
— the power pack
— unicell
— speed control switch
— safety switch
— indicator lamp
This section covers the troubleshooting procedure and
a guide which will enable you to determine the cause of
most problems. Refer to Section VIII for replacement
parts.
*This model is equipped with a permanently lubricated
motor and no further oiling is required.
COMPONENT FUNCTION
1. Power Pack — the electrical circuit is designed
around the power pack which contains the necessary
components to convert 115 Volts, single-phase, 60
hertz to the high voltage DC required for the unicell.
2. Unicell Ionizing Section — the ionizing section
supports four tungsten wires charged positive to a
nominal 11,000 volts DC. The baffle plates parallel to
the wire are at ground potential. Its function is to
electrically charge the contaminated particles as
they pass through it.
3. Unicell Collecting Section — the collecting section
consists of alternately charged plates. Plates are
alternately charged with a nominal 5,500 volts DC
positive. The field between the plates forces the
charged particles to the ground plates and removes
them from the airstream.
4. Air Mover — the air mover draws in contaminated
air and exhausts clean air through the outlet.
HOW THE HIGH VOLTAGE IS SUPPLIED TO THE
COMPONENTS
The power pack supplies high voltage DC to the
ionizing and collecting sections of the unicell by the
use of high voltage lead wires. Two separate terminals
are used on the output side of the pack. Terminal #8
supplies nominal 11,000 volts DC positive to the ionizer.
Terminal #7 supplies 5,500 volts DC to the cell (see
Figure 4).
TOOLS REQUIRED FOR TROUBLESHOOTING
— Screwdriver — (common type) 8" or longer with in-
sulated handle.
— Volt-Ohm Meter — for measuring low voltage input
(115 VAC), continuity (OHMS) and low voltage DC.
— High Voltage Probe (DC) positive polarity — for
checking the high voltage power supply (minimum
range from 0 to 15 KV DC).
HOW TO MEASURE HIGH VOLTAGE
For accurately measuring the high voltage, a 0 to 15 KV
minimum scale high voltage probe capable of mea-
suring positive polarity is required.
FIGURE 4
