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Installation, Operation, and Maintenance Manual # 509252 Rev R 91
Air Pressure Switch Replacement
1. Remove the irradiator cover.
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.
I310M/I311M Irradiator
NOTE: The I310M/I311M model is different from the standard I300M
irradiator in its internal construction, specifically in the reflector assembly and
the RF gaskets used.
Bulb, Screen, and Reflector Maintenance
Cleaning Guidelines
At least every 500 hours of operation, the irradiator should be removed from the light
shield, and the screen, lamp bulb, and reflector inspected carefully. Clean as needed.
Instructions for removing and replacing these components appear later in this chapter.
Guidelines for cleaning these components follow.
If the reflector or bulb surfaces show signs of dirt, oil or vaporized materials, they
should be removed and cleaned with a good industrial cleaner, using a lint-free cloth
or tissue. The cleaner should contain no waxes, silicones, dyes or perfumes. Simple
Green® and Windex® are recommended. Wipe away any residues, using the cloth or
tissue with pure water. Alcohol, isopropyl, or methanol may be used for final removal
of residues, except when alcohol is not allowed as a solvent.
If deposits on the screen, bulb, and reflector are consistently found at 500-hour
inspections, the blower filters should be changed more frequently, or a more efficient
filter should be used. These deposits can cause premature failures when particles burn
into the quartz lamp or cause dulling of the reflectors.