MAINTENANCE
EVERY 3 MONTHS: Check the air filter condition and clean if necessary (see below).
EVERY 6 MONTHS: Same as 3 months plus clean conden- sate tray with biocide suitable for polystyrene and clean fas- cia.
EVERY 12 MONTHS: Same as 6 months plus check all electrical connections for security, check condensate pump operation, and check the heating and cooling action to en- sure proper operation.
FILTER REMOVAL AND CLEANING
1.Ensure the unit is isolated from the electrical sup- ply and ensure that the fan(s) has come to a com- plete stop.
2.Unclip the catches along the edge of each grille and allow them to hang from the fascia by the molded plastic hinges located along the opposite edge.
3.If desired, the grilles can be removed from the fas- cia completely.
4.The filter can now be easily slid out of the small plastic retaining clips on the back of each grille.
5.Gently vacuum clean the filters on a medium power vacuum.
6.Replace filters by reversing steps 2 to 4.
NOTE: EMI recommends you keep at least one full set of cassette air filters as spares.
FAN REMOVAL
CAUTION: Isolate from the electrical supply before commencing work!!
1.Unclip the grille catches and remove the grille(s) from the fascia.
2.For medium and
3.Remove the electrical panel lid and disconnect the fan connections from within the electrical panel.
4.Rotate the fan by hand until two M6 nuts are visible through the fan mounting access holes. Remove the two nuts.
5.Rotate the fan 90° until the remaining two nuts are visible and remove while supporting the fan to pre- vent it from falling. The fan can now be dropped down from the unit.
CONDENSATE TRAY REMOVAL
1.Unclip the grille catches and remove the grille(s) from the fascia.
2.Remove the fascia by loosening the fascia mount- ing bolts and sliding the fascia horizontally until it releases from the chassis. If unit is micropro- cessor controlled, remove display panel cable from within the electrical panel before remov- ing the fascia.
3.Remove electrical panel lid by unscrewing the single self tapper and pull the lid horizontally away from the control box.
4.On medium and large sized units, disconnect the main wiring from the incoming terminal block and disconnect the fan wires from their connection points within the electrical panel. Separate any two part connectors coming from the electrical panel.
5.Drain the condensate tray by removing the small black rubber drain plug, catching any condensate in a suitable container.
6.Remove the self tapping screws securing the two insulated metal condensate tray support channels and pull the channels away from the condensate tray. Pull the condensate tray, complete with inlet ring (on medium and large sized units only) down- wards away from chassis.
CONDENSATE PUMP REMOVAL
1.Disconnect condensate pump and float switch wires from inside electrical panel.
2.Unscrew the three M4 screws holding the pump inspection plate in place and pull the pump and mounting bracket away from the chassis while feed- ing the pump wires between condensate tray and insulation.
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