Comfort-Aire VFH 24 CA - Manual (Page 19)

Heat Controller VFH InverterFlex ® - Ceiling Cassette
17
Cleaning the Air Inlet Grille
1. The air inlet grille should be cleaned in addition to the air filter when it becomes dusty.
2. Using the same process above, open the air inlet grille and remove the filter.
3. The air inlet grille can be removed completely from the panel.
4. Vacuum the dust from the grille using a vacuum hose attachment with brush. If needed, the grille can
be washed in lukewarm water and a mild detergent. Towel dry the inlet grille before proceeding to the
next step.
5. Reinstall the filter into the air inlet grille.
6. Push the inlet grille back up toward the frame of the panel.
7. Push the tabs back outward to lock the inlet grille in place and prevent it from falling.
Cleaning the Air Outlet Louvers
1. The air outlet louvers can be dusted to remove any dust build-up.
2. Vacuum the dust from the louver using a vacuum hose attachment with brush.
Initial Start-up and Test Run
1. When the ambient temperature is too low to run the unit in cooling mode to check the system, the unit
can be placed into manual operation.
2. To test the unit’s operation, ensure that the wired wall thermostat is disconnected in order for the
control panel to become operational. Note: If the wall mounted thermostat is not being used in the
application, disregard this step.
a. Turn the power off by the disconnect switch, allow the capacitors of the outdoor unit to
discharge.
b. Disconnect the wall mounted thermostat from CN9 on the control board.
c. Turn the power back on at the disconnect switch.
3. With the power on, using the unit’s control panel, press the test button to force the unit into cooling
mode.
4. In test mode, verify the system is operating as expected. If not, make the proper adjustments and re-
test.
5. After the system has been confirmed to run properly, the wired wall thermostat can be re-connected
with the power off if being used in the application.