Tetra Pak Hoyer Frigus 600, Manual

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6-27
Tetra Pak
Hoyer
B
F60 03 F 04
Fig. 6.3
Hoyer
Frigus
8
10
2
5
3
1
4
6
7
9
11
If production of different flavours of ice cream
is organized so as to produce lighter coloured
flavours first and successively produce darker
and darker flavours, product changeovers will
be very quick and involve very little waste.
All that need be done in this case is switch the
mix supply from one flavour to another; if the
pipes from the containers are set up with switch
taps all that need be done is close one tap and
open another, without stopping the freezer.
If it takes more time to change the mix and the
machine must be stopped.
6.3.1 Stop
If it takes more time to change the mix and the
machine must be stopped, proceed as follows:
a. Turn off the refrigerator compressor by turning
the switch anti-clockwise (1).
b. Turn off the feed pump by turning the switch
anti-clockwise (2)
.
c. Turn off the dasher by turning the switch
(3) anti-clockwise.
d. Disconnect the supply to the freezer (4)
from the vat containing the mix for which
production is to be stopped, and connect it
up to the container containing the new
(darker) mix to be produced.
6.3.2 Production restart
a. Turn the pump on at low speed using switch
(2) and potentiometer (5)
.
b. Start up the sanitised air plant using the
switch (11).
c. Wait until mix starts to come out (6).
d. Turn on the dasher with the switch (3).
e. Turn on the refrigerator compressor with the
switch (1).
f. Adjust the quantity of sanitised air let into
the mix using the pneumatic regulator (7).
g. Wait until the ammeter (8) indicates that the
ice cream is sufficiently hardened.
h. Increase pump speed to obtain the desired
ice cream production speed using the
potentiometer (5).
6.3 Production changeover
i. Set ice cream pressure using the regulator
(9).
l. If necessary, adjust the hardness of the ice
cream with the potentiometer (10).