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March 2004 Manual 599082
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3.3.2 Touch Switches
Two touch switches are used on the secondary control panel one to select the required wash cycle and one to turn
the Eco option on or off. They are capacitive touch switches and are supplied with an analogue signal from the
controller that will change in the presence of an earthed mass (i.e. customer’s finger).
3.4 Motor
The motor is a fully electronically controlled 80V, 60w, 3 phase, 6 pole brushless DC motor, running on wash at
between 2300-2850rpm depending on the cycle selected and at approximately 4200 rpm on Drain.
3.4.1 Rotor
The rotor is a four pole permanent magnet rotor with a graphite bearing at each end of the vertical shaft. At the
lower end of the rotor shaft is the drain impellor and at the upper end is the wash impellor.
3.4.2 Spray Arm
The spray arm is shaped for most efficient waterflow. The holes are positioned for best penetration into the wash
load, with the water jets angled to ensure the spray arm rotates at the most efficient speed. There is a flap valve
moulded into the top of the spray arm. This part lets air through the spray arm when the DishDrawer is filling with
water. The DishDrawer fill levels are more consistent with the flap valve system.
3.5 Wiring Cover
The wiring cover protects the customer from all electrical components in the motor area underneath the tub. All
electrical components regardless of voltage should be treated as live with respect to earth. It also serves to protect
the motor assembly, drain and fill hoses from damage when opening and closing drawers. The wiring cover acts as
a cosmetic part of the product.
3.6 Lid System
3.6.1 Lid Operation
The lid is a single piece of polymer plastic with a static seal co-injection moulded into it. Each side of the lid is clipped
into a yoke which is in turn connected to a worm drive lid actuator assembly containing a small brushed DC 24V
motor.
3.6.2 When Activated
At the beginning of each wash cycle, both motors are powered for approximately 10 seconds, which pulls the lid
down onto the tub in approx 5 seconds. The lid remains down for the duration of the cycle and is only lifted when the
DishDrawer beeps to signal the end of the cycle or if the customer pauses it to gain access to the tub.
3.6.3 During a Power Failure
If power to the DishDrawer fails with the lid down you can still force the tub open manually if access is required. It is
very difficult however to close the tub again without lifting the lid. The lid can be wound up manually with the tub fully
removed. Failure to raise the lid before closing the Drawer could result in the lid seal being damaged.
3.7 Tub
The tub is the main cavity where all the wash activity occurs. The tub is a polymer plastic receptacle which has a
wash pump and spray arm at the base. The tub also has guide vanes around its walls which direct falling water from
the wash cycle in a clockwise direction around the filter plate. This clears the filter plate of food particles into the
sump where they can be trapped or pumped out during the drain cycle.