5
Installation
While performing installation procedures all power to the unit must be ‘Off’ and there should be no
airflow through the heating/cooling system.
1. A template may be used for installation of the ComAir 20T. The template is included in the shipping
box. See diagram on next page for mounting locations.
2. Center the installation template on the ductwork using tape.
3. Mark holes for the four mounting screws.
4. Cut out openings in ductwork for the unit. See template for steps and recommended tools.
5. If the cover is installed, remove it by removing the four screws that secure it to the chassis and
disconnecting the ribbon cable that is attached to the display board that is mounted in the cover. Position
the ComAir 20T ‘Main Chassis Assembly’ into ductwork and secure with the self-tapping screws provided,
using a 5/16” nut driver.
6. Plug the ribbon cable into the display board and secure cover to main chassis. Assemble using the four
screws provided.
7. Plug the power cord into a non-switched (90VAC -277 VAC) outlet. Note: On initial startup, the ‘Power,
Air, Germicidal, Ozone and Low’ lights will remain on for 30 to 120 seconds. After this time the ‘Air,
Germicidal and Ozone’ lights will turn off.
8. Turn ‘On’ heating/cooling system and allow it to operate for five minutes, at this time the ‘Air,
Germicidal and Ozone” lights should illuminate.
9. Turn ‘Off’ heating/cooling system, the ComAir 20T will shut down within 5 to 30 seconds. After this time
the ‘Air, Germicidal and Ozone’ lights will turn off. The ‘Power’ and ‘Low’ lights will remain on when unit is
not in operation.
10. The ComAir 20T is now ready for use.
Note: Ozone air treatment occurs only when air is circulating through the heating/cooling system. For
maximum effectiveness and continuous air purification, turn the thermostatic controller switch from the
AUTO position to the ON position. The switch is located on the thermostat. Open windows or doors and
dirty ductwork may diminish the unit’s effectiveness.
