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2. General description
The GD 600 potwashing system is designed to cope wth the
requirements of small to medium-size kitchens. The pots are
washed in the machine with a mixture of granules, water and
detergent. All the components are included in the system for effi
cient potwashing. From collection of pots through preparation
to putting the clean pots back on the shelf. The GD 600 is spe-
cially equipped for granule potwashing but also gives excellent
results without granules.
Design
The machine has a capacity for 4 gastronorm 200 mm deep 1/1
containers.There are various fi ttings available.These are designed
to accept the whole gastronorm range from 2/1 to 1/9 trays.
Other kitchenware from ladles and whisks to large saucepans can
also be washed by altering the fi ttings in a simple operation. The
machine is delivered as standard with two fittings.
3. Functional desciption
All operations described in this chapter may only be carried out by
qualified staff.
All electrical components described in this chapter apply to 400-
volt machines. Recalculated electrical values apply to other voltages
(see technical data).
Method of Operation
The machine comprises a wash tank containing water and gran-
ules. The wash pump sucks water and granules from the bottom
of the wash tank through a coarse grid, so preventing large objects
from being sucked into the pump. In the bottom of the tank is
a granule valve which controls whether washing is to take place
with or without granules. The mixture of water and granules is
distributed evenly over the items to be washed via spray pipes
and special nozzles. The water and granules re-circulate in the
system. There are heater elements in the wash and rinse tanks to
heat the water to operating temperature.
After the washing phase there is a separation phase with just
water to rinse away the remaining granules from the items being
washed. Finally the items being washed are rinsed with fresh
water pumped from the open rinse tank, which is entirely sepa-
rated from the water mains network by means of what is known
as a type AB airgap, in accordance with EN 1717, and the rinse
water is pumped out from this via separate final rinse pipes and
nozzles. The final rinse is to wash away any granule residue and
to increase the temperature of the items being washed to guar-
antee a disinfectant cleaning. During the final rinsing phase the
refilling of the machine with water will occur.
Wash programmes
There are three wash programmes to choose from: short,
normal or long programmes, plus these programmes with or
without granules. If other times or combinations are required,
these can be programmed by an authorised service engineer.
The granules are separated out from the wash water once the
granule cycle is complete. The wash pump stops after 1 minute
of washing without granulate, then the final rinse starts. The
final rinse is set to guarantee a water temperature of 85 °C for
30 seconds.
If the rinse water temperature is too low, the wash time is
extended until it is at 85 °C. The wash programmes without
granules are 1 minute shorter than those with. When the steam
reduction function is used, the hot steam is condensed for 1
minute at the end of every programme.
Wash water system
The wash tank is fitted with a 9 kW heater element to keep the
wash water at the right temperature. The wash tank is filled with
heated water from the rinse tank. A temperature sensor in the
wash tank ensures that the wash water is at the right temperature.
A level sensor at the back of the wash tank maintains a constant
water level. Wash water and granules are pumped through the
two spray pipes and sprayed at high pressure at the items to be
washed. Water and granules are re-circulated in a closed system.
The granules are gradually rinsed out of the items to be washed
during the separation phase and rinsed out of the wash water.
Rinse water system
The rinse tank has a capacity of some 12 litres and is entirely
separated from the water mains network by means of what is
known as a type AB airgap, in accordance with EN 1717. 8 litres
of water are used for every final rinse. The water in the tank is
heated by a 9 kW heater element. The final rinse starts once the
wash cycle is completed. The rinse water at 85 degrees is pumped
and distributed through the nozzles on the rinse pipe. This rinses
away chemical residue while at the same time killing bacteria.
The final rinse jets are divided up on a four pronged final
rinse arm located in the lid together with the wash arm. They
are located so that the rinse water is directed evenly over the
items being washed. The machine is also filled with water via
these nozzles.
Heater elements and temperature sensors
The GD 600 is fitted with one heater element for heating the
wash water and one heater element for heating the rinse water.
The water temperature is regulated by means of temperature sen-
sors, one in the wash tank and one in the rinse tank, and these
emit signals via the control card to the relay switches for the
respective heater elements. The heater elements in the wash tank
and rinse tank operate alternately with priority for the rinse tank
during washing and for the rinse tank in standby mode. In the
event of an error in any of the temperature sensors, the wash
cycle is interrupted and the machine is returned to stop mode.
An error code relating to the temperature sensor is shown in the
display: see Troubleshooting on page 20. There are overheating
protectors in both the wash tank and the rinse tank in order to
prevent damage due to overheating of the heater elements.
Drain valve
At the bottom of the machine, on the front, is a handle for the
wash tank drain valve. This valve is fitted with a sensor which
senses whether the valve is open or closed. If the machine is in an
active process and the valve is opened, the machine switches to
stop mode and an error message is shown in the display.
WARNING!
Only qualified electricians may work
with the electrical unit.
The main fuse shall always be removed
when working with the electrical
components.
Incorrect connections can cost lives.
