Simco OVERHEAD Series, Instructions Manual

only regular maintenance suggested is emitter point cleaning, ion balance checking 
and ion output checking, Emitter point cleaning takes only seconds with the patented 
point cleaner. The BLOWER OVERHEAD contains an patented balancing circuit 
that is inherently self balancing. This circuit compensates for dirt build – up on 
emitters, emitter point wear, line voltage fluctuations and variations in air velocity. 
Scheduled checking of the ion output and balance should be considered to assure 
quality audit requirements. 
 
Emitter Cleaning 
To clean the ion emitter points: simply rotate the point cleaner knob located at the 
center of the outlet grille clockwise to the stop (approximately one turn)and release, 
The spring loaded point cleaning brush will return to its parking spot. 
Recommended frequency of cleaning is once a week. 
 
Air Inlet and Outlet Cleaning 
The air inlet grille on the rear of the unit and the ionized air outlet should remain 
clean to prevent restriction of air flow. They can be cleaned with a soft brush or 
vacuum. 
 
Air Filter Cleaning 
Remove the air filter from the rear of the unit by unsnapping the filter retainer. Rinse 
the filter in plain water while gently squeezing. If the dirt is stubborn, wash the filter 
in mild soap and water then rinse. Blot the filter dry with paper towels and allow to 
dry. Install filter on air inlet and secure by snapping the filter retainer in place. 
IMPORTANT: If an air filter is used, clean the air filter regularly. 
Ion Output Check   
To test the unit for ion output the use of a charged plate monitor is recommended. 
Discharge times can be measured and checked against the Ion Output tables in 
Section3, Specifications. If a charged plate monitor is not available, but a static 
meter such as a SIMCO handheld electrostatic field meter SHISHIDO electrostatic 
Analyzer or warmbier charged plate monitor is available, ion output may be checked 
with the following procedure. Take a piece of plastic and rub it with cloth until a 
static charge can be read with the static meter. Turn on the BLOWER OVERHEAD 
and set the fan speed to high. Hold the plastic one foot away from the ionized air 
outlet for five seconds. Remove the plastic from the ionized air stream and measure 
the static charge. The plastic should be neutralized. 
If no instrumentation is available, the unit’s operation can be verified with the 
following procedure. Tear-off about a 10 inch length of    transparent tape. Approach 
the nonadhesive side of the tape with your free hand note the electrostatic attraction 
of the tape to your hand. Pass the tape through the ionized air stream approximately