4.17 Rinsing and pumping system
The circulation and drainage pumps as well as the instantaneous
water heater are connected to the pump sump via plug-and-socket
connections. The instantaneous water heater is also screwed securely
to the pump sump. The filter system consists of four-fold filtration
(coarse filter, fine filter cylinder, surface fine filter, micro fine filter). The
pump sump, which houses the micro fine filter, is covered by the
surface fine filter. The surface fine filter is attached with the combined
coarse and fine filter cylinders to the base of the pump sump via
a bayonet catch. The detergent solution is drawn into the pump sump
by the circulation pump and forced into the instantaneous water
heater.
At the appropriate pressure the pressure switch for the heater is
actuated via the flange-mounted membrane. A temperature controller
connected in series disconnects the appliance at 85 °C to prevent
overheating. In mechanically controlled appliances, this temperature
switch is combined with a 65 °C temperature controller and housed in
one module, in electronically controlled appliances it is combined with
an NTC sensor (negative temperature coefficient) and housed in one
module. The sensor surface is in direct contact with the detergent
solution. The Aqua sensor is situated at the outlet of the
instantaneous water heater in the detergent solution flow and
measures the degree of turbidity. As the drainage pump is attached
directly to the pump sump, the impeller wheel and non-return valve
are accessible in the rinsing tank when the cover has been removed.
A = NTC / temperature controller H = Detergent-solution pump
B = Safety temperature controller
I = Pump wheel cover *
C = Instantaneous water heater
J = Non-return valve
D =
Circulation
pump
K = To the lower spray arm
E =
Seal
set
L = To the upper spray arm
F
= Pump wheel
M = Aqua sensor *
G =
Pump
sump
* Optional
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