2.Pull the silicone tubing off the low pressure port of the switch.

3.Disconnect the two electrical leads from the switch.

4.Reach inside the air distribution plenum and remove the short length of silicone tubing which secures the pressure switch to the plenum wall.

5.Insert the high pressure port (longer) of the new switch through the hole in the plenum wall and secure the switch with a new length of silicone tubing (supplied with the switch.)

6.Reconnect the electrical leads.

7.Reconnect the low pressure tube to the low pressure port (shorter) on the switch.

8.Reinstall the irradiator cover.

P300M/P300MQ Power Supply

The only routine maintenance required on the power supply is periodic cleaning. The service interval will vary depending on the environment in which the unit is operated.

Safety Procedures

Before servicing the power supply, first turn off and disconnect all power to the unit.

WARNING: Exercise extreme caution; the chassis weighs up to 40.3 kg (88.6 lbs.)

All high voltage capacitors have internal discharge resistors which should discharge to a safe level in 5 seconds. Physically shorting the capacitor terminals with an insulated screwdriver blade is advised as a second level of safety.

CAUTION: The integrated circuits on the control board assembly can be damaged by relatively small charges of static electricity. Static charges transmitted by fingertip (for example, those generated by walking across a carpet) may be sufficient to cause damage. Always touch a grounded metal surface before removing or examining the control card.

106F300S/F300SQ Ultraviolet Lamp System