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Chapter 2 - Principles of Operation
Wash Cycle Sequence – Cont.
The frequency and the length of the Wash Cycle is determined by the type of cooking equipment involved;
Light Duty, Light/Medium Duty, Medium Duty, Heavy Duty, and Extra Heavy Duty. Refer to Table T-2-16-1,
Typical Example of Frequency and Length of Wash Cycles, on page 2-16 for typical application. Washing the
Ventilator based on hours of operation for specific Duties of equipment provides the optimum in cleaning
performance with the lowest possible water and detergent consumption.
Wash Cycle Example
Extractor Wash Cycle – The Extractor Wash Cycle only comes on while the exhaust fan is on, typically dur-
ing cooking (Refer to Figure 2-4-1). Using Table T-2-16-1 on page 2-16, if the cooking equipment under the
Ventilator is Heavy Duty then the Extractor Wash would come on every 4 hours of fan operation, stay on for
3 minutes and then shut off. Refer to page 2-15 for additional details on the wash cycles.
Plenum Wash Cycle - The Plenum Wash Cycle only comes on while the exhaust fan is off (Refer to Figure 2-4-
2). Using Table T-2-16-1 on page 2-16, if the cooking equipment under the Ventilator is Heavy Duty then the
Plenum Wash would come on every 16 hours of exhaust fan operation, stay on for 3 minutes and then shut
off. Typically the Plenum Wash Cycle will begin, if the number of fan on hours has been satisfied, immedi-
ately after the exhaust fan has been shut off. Refer to page 2-15 for additional details on the Wash Cycles.
Note: Extractor Wash
comes on only when the
Exhaust Fan is On.
Note: Plenum Wash
comes on only when the
Exhaust Fan is Off.
ELXC Series - Cont.
Extractor Wash
Manifold
Extractor Wash
Sprays
Figure 2-4-1
Extractor Wash On
Extractor Wash
Manifold
Extractors
Figure 2-4-2
Plenum Wash On
2-4
Plenum Area
Extractors
Plenum Wash
Manifold
Grease Canal
Grease Gutter
Drain
Plenum Area
Plenum Wash Sprays
Plenum Wash
Manifold
Grease Canal
Grease Gutter
Drain
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