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Fig. 20—Wiring for High Altitude Operation
An ionizing-collecting cell that has been damaged, where the
designed spacing between electrically charged and ground com-
ponents has been decreased, may also produce an abnormal
amount of ozone.
Step 3—High Altitude Operation
Because air is less dense at higher altitudes, there is a possibility
of nuisance arcing. To reduce this annoyance, refer to the
following note. Cutting of red jumper wire will reduce voltage and
eliminate arcing. The red jumper wire must be cut in installations
of over 5,000 ft elevations. (See Fig. 20.)
NOTE: There is a red jumper wire on the power supply printed
circuit board, cutting this jumper will reduce output voltage by 6.0
to 8.0% and reduce ozone level.
If there appears to be excess ozone, check for:
• Damaged (bent) plates — Straighten or replace collector cell.
• Loose ionizing wires — Replace.
• Dirty cell — Clean.
• Loose high voltage connections — Repair or replace.
• Radio and/or television interference — This trouble is not
common, but when it occurs it is usually due to either
continuous high voltage "leak or discharge," or due to the
absence of a good common electrical ground. Refer to condi-
tions listed under "Crackling and Snapping" in Fig. 23.
YELLOW
A97173
Fig. 21—Airflow Sensor Kit Installation
Step 4—Airflow Sensor (optional)
An optional electronic airflow sensor kit is available (Part No.
KEAAC0101AAA) if air cleaner cannot be wired directly to the
EAC-1 or EAC-2 terminals. Location of airflow sensor is shown in
Fig. 21.
NOTE: Be extremely careful not to cover airflow sensor orifice
when sealing air cleaner and duct work. This hole is located on
right hand side (when facing unit) of power supply assembly. The
hole is 3/16-in. diameter and is located approximately 3 in. from
front and 1 in. from bottom of power supply assembly.
If air cleaner is installed in crawl spaces or attics that are dusty and
dirty, sensor on airflow switch over a period of time will be
covered with dirt and become inoperative because airflow over
thermistor is unable to cool it. The result is air cleaner will not
energize. In these applications, periodically cleaning the sensor
through side of power supply assembly with a cotton swab dipped
in rubbing alcohol will restore it to full operational use.
On continuous blower applications, after servicing air cleaner,
cleaning cells, or power outages by utility company, airflow sensor
must be reset. This reset requires that air handler in furnace/air
conditioner be stopped for minimum of 2 minutes to allow airflow
sensor to reset. To stop air handler, turn off the fan at the
thermostat. Reset thermostat to heating/cooling as required.
13
PC BOARD
MOUNTING
CLIPS
BLUE
A97174
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