11. Other information - Cleaning
105204
– WTS-300-E - V4.1 - 20.01.2022
Page 147
11.3 Heating control
The WTS-300 distinguishes between two heating phases:
A
-
Heating-up phase
-
programme step "H“
B
-
Further heating phase
- during the main circulation (n34 or n54 and n74).
During the heating-up phase, the water is heated to the temperature set (the display
shows the temperature measured by sensor 1 instead of the programme stage). The
next programme stage then follows. The heating-up time is, however, limited by an
adjustable timeout. Once the time has expired the control unit switches to the next
programme stage. The completion of washing is followed by a corresponding fault
report.
During the following further heating phase, the circulating washing solution is main-
tained at the further heating temperature that has been set.
NB:
If a second sensor has been configured as a washing sensor, temperature regulation
and the display switch over to the second sensor. See also the section “Function of
second temperature sensor 9.4".
Heater start delay
Depending on the system layout, a start delay for the heater can be set. This applies
only at the beginning of the heating-up phase (depending on whether this starts in
programme stage “D2" or “H”).
This delay can be used to prevent the system switching on to the next programme
stage too soon ...
- ... if pre-heated water- e.g. from a boiler - is cooled down by the cold walls of
the tank and needs to be reheated, or
- ... if, as a result of pre-set pump venting, the pressure switch triggers and the
heater is switched off (see also
the sections “Pressure switch” and “Pump vent-
ing”).
11.4 Influence on the temperature of the tank wall
By repeating warm pre-rinsing cycles, it is possible to warm up a cold tank or to cool
it down again at the end of cleaning with cold after-rinsing cycles.
In addition, it is possible to switch on the cooling compressor in parameter [r18] dur-
ing the after-rinsing in order to cool down the tank quickly with the cooled water
before the milk enters the tank.
11.5 Boost pump function (booster pump)
With the function "Boost-Pump", a booster pump can be controlled in water supply
networks with low water pressure.
For this, the function '21' "Boost Pump has to be assigned to a free output relay.
The booster pump is now always controlled when a water valve is opened.
Heater
Cleaning stage 1
Pre-rinse 1
Cleaning stage 2
Pre-rinse 2
Spülgang 3
Hauptspülgang 1
Spülgang 4
Zwischenspülen 1
Clean. stg. 0
Rinse out
Cleaning stage 3
Main rinse 1
Cleaning stage 4
Intermediate rinse 1
A B
NOTICE
