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4
COMPONENTS
4.1
Actuator
The thermo hydraulic system consists of a metal cylinder with plunger.
The cylinder is filled with a substance which expands greatly when
heated. The heat source is a PTC (positive temperature coefficient)
which is in direct contact with the metal cylinder. A strong pressure
spring returns the plunger back to its original position when the heat
source is switched off.
When voltage is applied to the PTC, the PTC heats up and transfers
the heat to the wax-filled metal cylinder. The wax expands and forces
the plunger out of the cylinder. The plunger transfers the mechanical
movement to the release mechanism for dispensing the detergent and
rinse-aid. If the heat source is switched off, the volume of wax is
reduced by the cooling process. The pressure spring returns the
plunger back to its original position. The actuation time is approx.
2 min., the reset time approx. 3 min.
Technical specifications:
Nominal voltage
Frequency
Resistance
202_58300000104305_ara_en_b – 02.11.a
110–240 V
50 / 60 Hz
0.5–1.5 kΩ
1
= PTC
2
= Contact
3
= Pressure spring
4
= Wax-filled cylinder
5
= Contact
6
= Plunger
X
= Plunger travel
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