General Description Of The Warewashing Machine - Meiko UPster U 400 Operating Instructions Manual

Operating Instructions UPster U 400 / U 500 / U 500S
CAUTION!
9735077

12.1 General description of the warewashing machine

12.1.1 Wash principle
The appliance has one wash and one final rinse cycle.
The temperature regulator keeps the wash temperature. A centrifugal pump circulates the
water out of the cleaning tank into the clean nozzles. The water jets reach the items to be
cleaned out of differing directions. Therefore an even cleaning result can be guaranteed.
The cleaning cycle is followed by the fresh water final rinse. The items are rinsed via a
separate nozzle system with hot fresh water 80 - 83° C. Thus heating up the items for the
following drying process. At the same time the final rinse water serves for the regenera-
tion of the wash water, the level of soil of the wash water thus being reduced.
12.1.2 Disinfection machine with Thermolabel control
(U 500 / U 500S)
Thermolabel = measuring tape that changes colour after 4 seconds at 71 °C and shows
the required hygiene value.
The tank water is heated up to 71 °C during washing. After a brief stop time the dripping
pause and the final rinsing starts as long as the washing time set in the programme has
been reached or exceeded.
Both method makes it possible to achieve disinfection levels higher than the standard
(e.g. in hospitals).
The tank temperature falls when the programme begins, depending on the washware.
The time needed to reach the set disinfection parameters can exceed the set program
time.
High washing temperatures and long retention times in the wash tank can lead to glass
corrosion and premature peeling of the decor.
12.1.3 Detergent dosing
The detergent dosing unit (option) is designed for the automatic adding of liquid, alkaline
detergent into the wash water.
The detergent is transported out of the container into the clean tank by means of a hose
line. The dosing equipment is self-priming. Dosing occurs during each filling cycle and at
the beginning of each program cycle via timer control.
Normally, a dosing of approx. 2 ml of detergent per litre of tank water is the correct
concentration. This can be increased/reduced acc. to the water quality, items to be
washed and degree of soiling to 5 ml/l or to1 ml/l.
12.1.4 Rinse aid dosing
The rinse aid dosing unit is designed to automatically add liquid final rinse aid into the
fresh water.
The rinse aid is pumped out of the storage container into the fresh water supply line
through a hose. The dosing equipment is self-priming. Dosing takes place during each
filling cycle.
The correct dosing results in a smooth, even water film.
In case of overdosing, there are bubble and stripe formations - reduce dosing.
In case of under-dosing, water drops remain on the washed items - increase dosing.
Design and construction subject to change without prior notice
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