Theory Of Operation - Whirlpool GU2800XTV Manual

GENERAl
2008 Undercounter Diswasher
Your dishwasher has the latest technology
in dishwasher filtration. This triple filtration
system minimizes sound and optimizes water
and energy consumption while providing
superior cleaning performance. Throughout
the life of your dishwasher, the filter will
require maintenance to sustain peak cleaning
performance.
The triple filter system consists of 2 parts
which filter one hundred percent of the water.
The majority of water is filtered thru the upper
filter, and the remaining water is filtered thru
the fine mesh filter of the lower filter cup.
• The upper filter assembly keeps oversized
items and foreign objects along with very fine
food particles out of the pump.
• The lower filter keeps food from being
recirculated onto your dishware with the
fine mesh screen.
• Inside the lower filter is a baffle that stands
in front of the wash motor inlet. This baffle
optimizes the performance of the lower filter
and keeps large items from entering the wash
pump.The lower spray arm has a spray nozzle
pointing down to clean the screen and direct
the food soils to the filter cup.
The filters may need to be cleaned when:
• Visible objects or soils are on the Upper Filter
Assembly.
• There is degradation in cleaning performance
(that is, soils still present on dishes).
• Dishes feel gritty to the touch.
In drain, the water flows through the center of
the filter cup, down and out the drain opening.

THEORY OF OPERATION

DIvERTER vAlvE
During wash, water travels from the wash motor
up through the diverter valve which only allows
the water to flow through one of three wash
zone configurations.
1. Middle wash arm and upper spinner
2. Lower wash arm and upper spinner
3. TurboZone only
Cycle times are longer in this dishwasher, typically
20 minutes per cycle, due to lower water consump-
tion and alternating wash zones. Some cycles can
last up to four hours. The short one hour cycle
does not include a dry cycle.
vERY HARD WATER
If the customer has hard water (above 15 grains),
the filter should be cleaned at least once per
month. Building up of white residue on the
dishwasher indicates hard water.
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