Does anyone have any info for a VentiFlow 100 made by Applied Ion
Technologies Inc.? I can't find anything anywhere, trying to find out
what the adjustments do, it has Cleaning Alarm Adjust, Balance Adjust,
Vr2 & Vr3. Any help or insight always appreciated.

Steve

In case anyone reads this, I traced the circuit back as best as I
could. This unit has two HV power supplies, positive and negative.
The balance is adjusted using the Balance adjust pot. The front fan
grill is isolated and used as a sensor. The grill is connected to an
amplifier, which is fed into a window comparator. VR2 and VR3 adjust
the limits of the window comparator, VR2 is high limit, VR3 is low
limit. The comparator drives the balance alarm LED. I didn't look
into the cleaning LED section, I got tired of reverse-engineering it.

The test jack on the back is a mini-din type jack. Pin 1 is the high
limit signal of the comparator, pin 2 is the amplified grill voltage,
pin 3 is the low limit, and pin 4 is gnd. Pin 5 & 6 are N.C.

Due to there being no monitored output of the cleaning alarm, I assume
with the unit clean you adjust the pot until the light just goes off.

I adjusted balance for appx 0VDC, and set the limits for -.25 &
+.25VDC. No idea if this is right, but without any info, it seems
like my best bet.

Also, the pins on the power jack are as follows (when looking into the
jack with the pins at the top)

The left two pins are -15VDC, middle two gnd, and right two +15VDC

Hope this helps someone, and don't take all of this info for fact, I
could quite possibly be wrong.

Steve