The filters pull out easily. New filters should be tucked in at the edges. The white side belongs outside, so the blue side should face in.

CAUTION: Do not operate the modular blower without a properly installed air filter. Unfiltered cooling air can reduce lamp bulb and reflector life.

Blower Cover Removal

Remove the six M5 truss head screws and lift off the blower cover. With this cover removed, the blower components are exposed and accessible.

Motor Replacement

WARNING: Turn off all power to the unit before servicing.

1.Remove the blower cover. Remove the screws holding connector J11 to the blower chassis. Cut the leads to the blower and disconnect the ground wires from the ground screw (see Figure 48 on page 119).

2.Remove wires from capacitor C200.

3.Remove the blower housing cover plate.

4.Loosen the motor support clamps. Remove the motor and wheel through the housing.

5.Carefully measure and record the length of the shaft projection beyond the bearing hub.

6.To remove the wheel from the motor, loosen the wheel set screw and remove the wheel.

7.To replace these items, reverse the process, being careful to reinstall the wheel so that it is at the same point on the shaft.

118F300S/F300SQ Ultraviolet Lamp System