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Setting the ComAir 20T
Inside the cover on the control board are 5 dip-switches that allow
the control board to be configured for your particular installation.
Moving from the top of the control board down:
Table 1 - Control Board Dip Switch Settings
Switch
The 10 LEDs will indicate the signal level coming into the
Switch 1
control board from the ambient ozone controller inputs.
The unit will expect a signal from an ambient ozone
Switch 2
controller to regulate the ozone output.
The ambient ozone controller connected to the unit
provides a continuous voltage or current signal
Switch 3
proportional to the ozone. For example, the
controller provides a 0-5V signal with 0 volts equal to 0
ppm ozone and 5 volts equal to 0.5 ppm of ozone.
The ambient ozone controller connected to the
unit is in a higher range:
Switch 4
0-5V with 5V = 0.5 ppm
Or
4-20mA with 20mA = 1 ppm
The unit is ready to communicate with the remote
Switch 5
display through the RJ-45 connector
6 • Pentair® ComAir 20T Installation and Operation Guide
When Positioned Left (Off)
Control Board Dip Switches
Figure 7
When Positioned Right (On)
The 10 LEDs will indicate the current mode of the unit.
The unit will not use an ambient ozone controller to
regulate the ozone output. It will provide output equal
to 25%, 50%, 75% or 100% of the max lamp output
determined by mode setting.
The ambient ozone controller connected to the unit
provides a relay signal. The relay is closed when the
ozone level is below the set point set on the controller
and open when the ozone level is above the setpoint set
on the controller.
The ambient ozone controller connected to the
unit is in a lower range:
0-2V with 2V = 0.1 ppm
Or
4-20mA with 20mA = 0.1 ppm
The unitis sending serial data through the RJ-45
connector that can communicate with an external
serial device.
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