Tetra Pak Hoyer Frigus 600 User manual

Tetra Pak
Hoyer
B
F60 03 - 04
Hoyer Frigus 600
Tetra Pak Hoyer S.p.A.
Via Monferrato, 54
20098 San Giuliano Milanese (Milano)
Italy
Telephone [phone]
Telefax [phone]
We hope that the information will be of help to
you. It is based on concrete data and on the best
of our current knowledge.
Read the contents of the manual carefully,
including the warnings and recommendations.
No part of this manual may be reproduced or
transmitted to third parties without the prior
written permission of Tetra Pak Hoyer.

Tetra Pak
Hoyer
B
F60 03 - 04
1Machine identification data
2General information
3Description of the machine and technical data
4Installation
5Operator panel
6Operating procedures
7Cleaning and maintenance
8Troubleshooting
9Spare parts list
10 Index of attachments

Tetra Pak
Hoyer
1-1
Contents
B
F60 03 A 04
HOYER FRIGUS 600
1 - MACHINE IDENTIFICATION DATA
1.1 Introduction .............................................................................................................. 1-2
1.2 Identification plate.................................................................................................... 1-2
1.3 Service centres ......................................................................................................... 1-3

Tetra Pak
Hoyer
1-2 B
F60 03 A 04
MODEL
SERIAL N.:
YEAR OF CONSTRUCTION:
ELECTRICAL SUPPLY:
PNEUMATIC SUPPLY:
REFRIGERANT:
HEATING GAS:
THERMAL CAPACITY:
kW
Kg.
Kcal/h
Via Monferrato, 52 - 20098 San Giuliano Milanese
( MI ) Italia - Tel. [phone] - Fax [phone] Made in Italy
Tetra Pak
Hoyer
V
bar Nlt/min.
ph Hz
Type
1.2 Identification plate
For maintenance and overhaul operations not
covered by this manual and for all technical
problems, our Service Department will be happy
to supply any information required and to agree
Fig. 1.1 - Identification plate
1.1 Introduction
Thank you for choosing a machine manufactured
by Tetra Pak Hoyer S.p.A.
We recommend that you read this manual
carefully as it is indispensable for the
installation, checking and maintenance
operations required to keep your machine in
perfect working order.
Il manuale contiene tavole, disegni e schemi che
Vi permetteranno di familiarizzare con la mac-
china in tutti i suoi dettagli.
Vi preghiamo di segnalarci le Vostre osserva-
zioni nel caso qualche spiegazione sia stata
omessa o non sia esauriente. Ne terremo conto
per migliorare il carattere funzionale di questo
manuale.
the necessary course of action.
When calling our Service Department, please
quote the data shown on the identification plate
affixed to the machine and shown in Fig. 1.1.

Tetra Pak
Hoyer
1-3
B
F60 03 A 04
1.3 Service Centres
For any assistance you may require, please
contact one of the following Tetra Pak Hoyer
authorised service centres:
EUROPE and
MIDDLE EAST:
Tetra Pak Hoyer ApS
Soeren Nymarks Vej 13
DK-8270 Hoejbjerg
Denmark
Phone: [phone]
Fax: [phone]
Tlx: 6 87 70 alhoy dk
Tetra Pak Hoyer S.p.A.
Via Monferrato, 52
I - 20098 San Giuliano Mila-
nese
(Milan)
Italy
Phone: + 39 2 98 29 21
Fax: + 39 2 98 80 171
Tetra Pak Hoyer France
c/o Tetra Laval Service SARL
R.C.S. Versailles B403 276 223
P.O. Box 56
F-78340 Les Clayes-Sous-Bois
France
Phone: [phone]
Fax: [phone]
NORTH AMERICA:
Tetra Pak Hoyer Inc.
7711 95th Street
P.O. Box 0902
Pleasant Prairie, WI 53158-0902
USA
Phone: [phone]
Fax: [phone]
SOUTH AMERICA:
Tetra Pak Hoyer Industria e
Comércio Ltda.
Rua Napoleao de Barros, 1038
Cep04024-003 Sao Paulo-SP
Brazil
Phone: [phone]
Fax: [phone]
ASIA/PACIFIC:
Tetra Pak Hoyer Shanghai
Shanghai Overseas Chinese
Mansion
Room 2105-2107
No. 129, Yan'an Xi Lu
200040 Shanghai
P.R. China
Phone: [phone]
Fax: [phone]
Tetra Pak Hoyer Service
3rd Floor, Molace Building
2231 Pasong Tamo Street
Makati, Metro Manila
Philippines
Phone: [phone]
SOUTH KOREA:
Hoyer Ltd.
4fl. Dookyong Bldg.
66-1/9 Hannam-Dong
Yong San-Ku
140-210 Seoul
South Korea
Phone: [phone]
Fax: [phone]
THAILAND:
Tetra Pak Hoyer (Thai) Ltd.
1042 Soi Poosin, Sukhumvit Soi
66/1
Bangchak, Prakanong
Thailand
Phone: [phone]
Fax: [phone]
C.I.S.:
Tetra Pak Hoyer A/O
4th Rostovsky peureulok
Dom 1, stroenie 1
R-11921 Moscow
C.I.S.
Phone: [phone]
Fax: [phone]

Tetra Pak
Hoyer
2-4
Contents
BF60 03 B 04
HOYER FRIGUS 600
2 - GENERAL INFORMATION
2.1 Declaration of conformity ........................................................................................ 2-2
2.2 Preliminary points .................................................................................................... 2-2
2.3 General safety rules .................................................................................................. 2-2
2.4 Special warnings ...................................................................................................... 2-3
2.5 Ambient operating limits ......................................................................................... 2-3
2.6 Residual risks ........................................................................................................... 2-3

Tetra Pak
Hoyer
2-5
B
F60 03 B 04
2.1 Declaration of conformity
This machine has been manufactured in
accordance with international standards and
hygiene and sanitary legislation applicable to
food machinery.
In particular Tetra Pak Hoyer certifies, through
the Declaration of Conformity supplied with the
machine, that the HOYER FRIGUS machine
is designed and manufactured in accordance with
the provisions of Directive 98/37/CE (Machinery
Directive) and with the above-mentioned
standards.
•The illustrations and drawings of the machine
are intended for general reference only and
are not necessarily accurate in every detail;
•The machine dimensions and specifications
given in this manual are not binding and may
be changed without prior notice;
•The drawings and all other documents
provided as a part this machine remain the
property of Tetra Pak Hoyer and must not
be passed on to third parties without the
written permission of Tetra Pak Hoyer.
•The manual includes instructions for all
accessories mounted on the standard
machine.
•The machine is covered by warranty as
laid down in the purchase contract. Any
repair work not authorised by Tetra Pak
Hoyer carried out during the warranty
period will automatically invalidate the
warranty.
2.2 Preliminary observations
2.3 General safety rules
•THESE SAFETY RULES HAVE BEEN
DRAWN UP IN YOUR INTEREST. Strict
observance will reduce the risk of accident
to yourself ot to others.
•DO NOT attempt to move, install or operate
the machine before reading and assimilating
the contents of this manual. Ask your superior
in case of doubt;
•make sure that all guards and safety covers
are in place BEFORE starting the machine;
•NEVER leave tools, mechanical parts or
other foreign materials on or inside the
machine;
•in the event of a malfunction, press the
emergency stop button.
•NEVER PUT YOUR HANDS INSIDE THE
MACHINE WHEN IT IS IN OPERATION;
•exercise caution even when the main switch
located on the tunnel is in the “OFF” position,
as the supply conductors will still be live;
•shut off the compressed air supply before
disconnecting any pneumatic component;
•make sure that all guards and safety covers
are correctly in place BEFORE restarting the
production cycle subsequent to maintenance
or repair operations;
•proceed with caution at all times. Remember
that you are responsible for your own safety
and for that of your colleagues;
•make sure that applicable regulations are
observed when moving or lifting the
machine.

Tetra Pak
Hoyer
2-6 B
F60 03 B 04
•All personnel operating the machine must be
familiar with the general safety rules and
must observe them strictly. Failure to follow
these rules may result in personal injury
ordamage to machine components;
•maintenance work must be performed with
the machine turned off. The main switch must
be in the “OFF” position, the air valve closed
and a “ work in progress” sign affixed to the
machine;
•the user must make sure that all the
instructions given in the manual are
scrupulously observed;
•users will be solely responsible for risks
caused by tampering with the safety system;
•The safety of machines used in conjunction
with this machine, if not supplied directly by
tetra Pak Hoyer, is the responsibility of the
customer.
•The pressure, speed, temperature and voltage
limits and all instructions given are
indispensable for correct operation of the
machine and must always be complied with
by the customer.
•Ambient conditions must be taken into
consideration during installation.
•National legislation governing this type of
machine be observed.
The machine is suitable for operation in the
following ambient conditions:
•Temperature : from 4°C to 40°C
•Humidity : from 20% to 95%.
NOTE:
Tetra Pak Hoyer will accept no responsibility for
damage or injury caused by failure to comply
with the above warnings.
2.4 Special warnings
2.5 Ambient operating limits
2.6 Residual risks
The Frigus maker is used for combining ice-
cream mixture with sanitary air in fixed
quantities and, subsequently, for forming the
ice-cream with the addition of cold generated
by a refrigeration cycle.
The mixture of ice-cream and sanitary air is
blended inside a manifold by means of the
pressure of a rotating pump and the injection of
compressed air which is then pushed to the
cylindrical evaporator of a refrigerating system
for the treatment of ice-cream.
Several issues arise when adapting the pre-
printer to suit the needs of man: more precisely,
centralizing the controls on a single instrument
panel for the functions of adjustment and control.
The top lid of the freezing cylinder is interfaced
with a safety microswitch. The machine will stop
if the lid is removed.
All the transmission parts, the kinematic motions
and the refrigerating system are protected by
fixed boards.
Dismantling side panels (anchored in place with
screws) permits contact with moving parts.
This residual risk is referred to in section 3.5
Prohibition and hazard signs and with a sign
indicating moving parts positioned on the
panels.
A signal of danger is placed on the flap of the
electric box to indicate live equipment.
For additional safety, the remaining risk is
recalled in paragraph 3.5 Instructions on ban
and danger signals.

Tetra Pak
Hoyer
3-7
Contents
BF60 03 C 04
HOYER FRIGUS 600
3 - DESCRIPTION OF THE MACHINE AND TECHNICAL DATA
3.1 Description of the machine ...................................................................................... 3-2
3.1.1 Filter set .......................................................................................................... 3-2
3.1.2 Mix pump ....................................................................................................... 3-3
3.1.3 Freezing cylinder ............................................................................................ 3-3
3.1.4 Refrigerating plant .......................................................................................... 3-4
3.1.5 Electrical system ............................................................................................. 3-4
3.1.6 Control panel .................................................................................................. 3-5
3.2 Technical data........................................................................................................... 3-6
3.3 Improper use ............................................................................................................ 3-7
3.4 Demolition and disposal........................................................................................... 3-7
3.5 Warnings, prohibition and danger signs ................................................................... 3-7

Tetra Pak
Hoyer
3-8 B
F60 03 C 04
Fig. 3.1
Fig. 3.2
1
4
2
5
3
3.1 Description of the machine
The machine mixes sanitised air into ice cream
mix to obtain the desired overrun, cools and agi-
tate the mix with air incorporated in it to create
the viscous product known as ice cream, and
supplies sufficient pressure to convey the ice
cream to its destination through a pipe.
In order to carry out these functions the machine
incorporates the following components:
-aset of filters which sanitise air coming from
the compressed air supply.
-apump which receives mix from ageing vats,
and sends the product to the freezing cylinder.
-freezing cylinder with a dasher and blades,
inside which air is uniformly blended into
the mix and the product is cooled until it takes
on a thick consistency.
-arefrigerating plant connected to the outside
wall of the freezing cylinder to cool it down.
The shop’s compressed air (the machine does
not have an air compressor of its own) passes
through a pressure reducer (1) and a mesh filter
(2) to separate out any large particles; these are
followed by a microfilter for oil vapours (3) and
an active carbon filter (4) to eliminate odours.
Finally, the clean air goes through a (sterilisable)
Teflon (5) membrane filter with microscopic
pores specifically intended to stop the passage
of bacteria.
The sanitised air thus obtained is let in between
the first and second stage of the mixing pump at
a rate of flow which may be controlled by the
operator using the control panel; changes in the
rate of flow permit variation of ice cream volu-
me.
3.1.1 Filter set (3.2)
-an electrical system for command and control
of all machine functions.
All these items of equipment are assembled on a
strong, compact stainless steel frame.

Tetra Pak
Hoyer
3-9
B
F60 03 C 04
Fig. 3.3
Fig. 3.4
1
3
2

32
1
It is a two-stage pump constructed with two
pistons of different sizes; the first (1) receives
and batches a quantity of mix determined by the
operator on the basis of the desired hourly
production; the second stage (2) receives mix
dispensed by the first stage and sanitised air let
in between the two stages and puts it all into the
freezer cylinder.
As the difference in volume between the first
and the second stage (a result of the size of the
pistons) does not change under different pump
pressure and speed conditions, the quantity of
air let in per mixing unit is also constant and
depends on the rate of flow of the air. By
adjusting the flow of sanitised air, the operator
therefore controls the increase in volume, which
remains constant throughout the production
cycle.
The pump is driven by an electric motor
commanded by an inverter (for speed changes)
3.1.2 Mix pump
This is the most important part of the machine:
an upright pipe with a chrome coating on its
inside walls, surrounded by a jacket in which
coolant fluid flows to cool down the cylinder. A
dasher (1) with three blades rotates inside it,
scraping the chrome-plated inside surface to
ensure that frozen ice cream does not build up
on the walls. The top (2) and bottom (3) ends of
the cylinder are closed by two covers, which in-
corporate the mix feed pipe (bottom) (3) and the
ice cream exit valve (top) (2).
Mix blended with sanitary air coming from the
pump flows into the bottom part of the cylinder
(3); on its way to the top it is whisked by the
dasher (1) and cooled by contact with the walls
of the cylinder, kept cold by the refrigerating
plant. The ice cream forms and then flows out
of the ice cream outlet valve (2), which is
controlled pneumatically to regulate the pressure
of ice cream in the cylinder.
In order to make sure the machine operates
correctly, it is important to be very careful not to
damage the cylinder, always making sure that
3.1.3 Freezing cylinder
the scraper blades are in perfect condition and
have been assembled correctly.
and incorporates a pneumatically driven by pass
(optional) for CIP washing. It works properly at
relatively high pressures, so that no extraction
pump is needed coming off the machine.

Tetra Pak
Hoyer
3-10 B
F60 03 C 04
Composed of the freezing cylinder (evaporator),
a Scroll Compliant rotary compressor, a high
efficiency condenser, an economiser, a
thermostatic valve and a number of minor
accessories. All these components are designed
specifically for operation at low temperatures
using R404A coolant gas.
Cooling is carried out by steam compression: the
compressor pumps gas into the condenser, where
it is cooled and liquefied, and the liquid gas then
passes through the thermostatic valve and is
vaporized in the freezer cylinder (transforming
into gaseous state once more) before returning
to the compressor and starting the cycle again.
Vaporization of gas in the freezing cylinder
removes heat from the ice cream mix, which
3.1.4 Refrigerating plant
The electrical system consists of the operator
panel and the electrical panel which covers all
of the rear of the machine. The operator panel
may be used to activate or deactivate all machine
functions, adjust functions and indicate
anomalies. The electrical box at the rear contains
the main switch and all control and power
devices.
3.1.5 Electrical system
cools down; the heat is then disposed of in the
condenser, where it is transferred to the water
coming from the cooling tower (or well), heating
it.
A pressure switch valve assembled on the
condenser water circuit keeps condensation
pressure constant, independently of water tem-
perature.
The system mounted on the Frigus 600 is a
particularly efficient one which makes use of a
dependable, low maintenance Scroll compressor
which acts as a two-stage compressor with an
economiser to obtain considerable cooling
capacity and improved dependability.

Tetra Pak
Hoyer
3-11
B
F60 03 C 04
Hoyer Frigus
4
1
6
14
9
11
10
2
13
15
17
12
Fig. 3.5
3
5
7
8
18
16
3.1.6 Control panel
1White power indicator lamp
2Red thermal switch indicator light
3Pump start/stop switch
4Litre counter
5Pump potentiometer
6Dasher motor ammeter
7Dasher start/stop selector
8Compressor start/stop switch
9Overrun air ON/OFF switch
10 Hot gas control potentiometer
11 C.I.P washing switch.
12 Emergency stop pushbutton
13 Overrun pressure indicator
14 Overrun pressure regulator
15 Cylinder outlet valve pressure indicator
16 Cylinder outlet valve pressure control
17 Coolant evaporation pressure gauge
18 Dasher pressure indicator

Tetra Pak
Hoyer
3-12 B
F60 03 C 04
A
B
C
Fig. 3.6
3.2 Technical data
Dimensions and weights:
Dimensions
A = 1330 mm
B = 755 mm
C = 1665 ±25 mm
Net weight: 525 Kg
Gross weight: 725 Kg
Volume (with packaging): 2.96 m3
(1,60x0,95x1,95h metres)
Rated capacity in standard conditions:
from 200 to litres/hour of ice cream at –5.5ºC
Standard conditions:
Mix input temperature: + 4°C
Overrun: 100%
Neutral mix with 38% solids content
Electrical specifications:
Dasher motor: kW
Pump motor: kW
Refrigerator compressor: kW
Auxiliaries: kW
Total installed power: kW
Compressed air:
Operating pressure: 6-10 bar
Consumption (max): 10 Nl/min
Filtering degree: A0
Connector: 1/2” female
Refrigerating plant:
Coolant gas: R404A
Quantity: 2.8 Kg
Condensation water:
a) dwell water + 5°C 600 l/h
b) mains water +15°C1300 l/h
c) tower water +28°C3600 l/h
Water inlet connector: 1” gas female
Water outlet connector:1” gas female
Noise:
A-weighted equivalent sound pressure level at
1 metre:
Leq(A) = 70.5 dB(A)
Max. C-weighted instantaneous sound pressure
level at working positions:
Less than 130 dB/20uPa
Max. non-weighted sound pressure level at
working positions:
Less than 140 dB/20uPa
Electromagnetic compatibility:
Conforms to VDE 0843/IEC801; wiring in
accordance with EN55011
Number of operators: 1
600
5.5
0,75
9,5
0,85
16,6

Tetra Pak
Hoyer
3-13
B
F60 03 C 04
3.3. Improper use
Though the machine is equipped with a number of
safety systems, operators must be very careful to
make sure that no situations arise which could
potentionally put them or others in danger.
The machine is designed and built exclusively for
the use described in chapter 3.1. Any other use must
be considered improper and unreasonable. The
manufacturer shall not be held responsible for any
damage caused by improper, erroneous or
unreasonable use.
Everyone who works on the machine must be
adequately trained in thecorrect working methods
and informed of the nature and functioning of
safety devices.
3.4. Demolition and disposal
Information of use for disposal of the machine
and its components.
The machine must be demolished by specialised
personnel wearing appropriate safety garments
and working in compliance with safety and
environmental legilation.
Construction materials:
- steel, stainless steel, aluminium, cast iron
- copper, silver in electrical components
- rubber, nylon, PVC, resins and fibres.
No component is toxic or harmful.
Dispose of reducting gears carefully as they are
full of oil.
Do not abandon these components or dispose of
them with regular waste.
WARNING! When finished using
machines and components, dispose of them in
accordance with the laws in effect in your country.
3.5 Warnings, prohibition and danger signs
WARNING :
Dismantling side panels (anchored in place with
screws) permits contact with moving parts.
A moving parts sign must be positioned on the
panels.
WARNING :
The doors of the electric board can be opened
using the tools supplied with the machine.
The opening of the doors disconnects the
components downstream from the main swutch.
Some components may continue to be powered
by residual current for a specific interval of time.
After opening the machine, avoid touching the
internal parts for at least 5 minutes.
A sign indicating the presence of powered parts
is placed on the door.

Tetra Pak
Hoyer
4-14
Contents
B
HOYER FRIGUS 600
F60 03 D 04
4.1 Unpacking, delivery checks and transport ............................................................... 4-2
4.2 Installation ............................................................................................................... 4-3
4.2.1 Cooling water connection (tower water) ........................................................ 4-4
4.2.2 Ice cream intake and outlet connection .......................................................... 4-5
4.2.3 Compressed air connection ............................................................................ 4-5
4.2.4 Electrical connection ..................................................................................... 4-5
4.3 Installation check .................................................................................................... 4-6
4 - INSTALLATION

Tetra Pak
Hoyer
4-15
B
F60 03 D 04
Fig. 4.1 Fig. 4.2
The machine is packed in wooden crates.
Unpacking must be done close to the installation
position. The cases may be easily transported
by a lift truck.
If the crate has been damaged during transport,
notify the insurance company immediately and
do not proceed with removal of packaging until
authorised by the insurance company.
When the crate is positioned in the place of
installation, proceed to remove the machine from
its packaging as follows:
a. Unnail the top cover and remove it. Do the
same with the side panels. Take care with
the wooden spacers between the walls of the
crate.
b. Remove the box containing spare parts and
the other components from the crate.
c. Unnail the wooden blocks that hold the
machine in place during transport and
remove the protective cellophane.
d. Check that the content of the package
corresponds to the shipping documents.
e. Make sure that all covers and panels are
correctly fastened in place and there are no
loose parts.
f. Visually inspect all electrical components to
make sure they are in perfect condition.
g. If any part or component is missing, notify
Tetra Pak Hoyer immediately.
The machine may be moved using a fork lift
truck, taking care to position the forks so that
the machine’s weight is evenly distributed.
4.1 Unpacking, delivery checks and transport

Tetra Pak
Hoyer
4-16 B
F60 03 D 04
Fig. 4.3
The machine is fully tested and regulated in the
factory with about one hour of ice cream
production prior to shipment to the customer.
Installation simply involves connecting up the
pipes for the condenser cooling water supply, ice
cream mix intake and outlet, compressed air
supply and electric power supply. There is no
need for internal adjustments to the machine; we
recommend that factory settings not be changed.
Proceed with the installation procedure as
follows:
a. Position the machine in its operating position
and check the plate data to make sure that
the machine is compatible with the site’s
electrical power supply, and compressed air
supply.
b. Level the machine with a spirit level by
means of the adjustable feet.
The plates provided may be applied
underneath the feet.
c. Connect up the condenser cooling water
pipes (1) (2). If tower water (+28°C) is used
for cooling, use inlet (7) and shut off inlet
(2).
d. Connect up the ice cream mix intake (3) and
outlet (4) pipes to the production line.
e. Connect up the compressed air pipe (5).
f. Connect the machine to the ground and to
the electrical power supply (6).
4.2 Installation
195
443
50 1070
1005 280
1530
443
580 696
30 600 120
3
156 2
5
6
1
2
44
3
750
82
7

Tetra Pak
Hoyer
4-17
B
F60 03 D 04
Fig. 4.4
4.2.1 Cooling water connection (tower water)
Connect up the supply of condenser cooling
water, taking care to get the direction of water
flow correct: water must flow in through the
connection at the bottom (1) and out through the
connection at the top (2). It is recommended that
two on/off taps (3) (4) be installed close to the
machine, as well as a small drain tap (5) close to
the bottom connection; it is also a good idea to
connect up these two taps with the machine
through two pipe unions (three-piece connectors)
to make it easy to separate the freezer from the
installation.
The machine is fitted with a pressure valve which
controls the flow of water in inverse proportion
to its temperature to obtain constant cooling
(constant condensation pressure on the coolant
side); this makes it possible to use water supplies
with widely varying temperatures for cooling the
condenser. The water flow varies as a result, from
about 600 litres/hour at 5ºC to 3600 litres/hour
at 28ºC (average values for machine in operation
at maximum production rate).
Pipe diameter depends on pipe length and the
pumps available, and must never be less than
the diameter of the connections, which is 1” gas.
It is essential to wash out the pipes BEFORE
connecting them to the machine by flushing them
with water to eliminate any particles or dirt. If
the water that flows out of the pipes continues
to be dirty, it will be necessary to install a filter
with a filtering capacity and size appropriate to
the type and amount of dirt conveyed at the intake
(1) (the bottom connection). In any case, it is
recommended that you install the filter to redu-
ce soiling of the condenser.
See Chapter CLEANING AND
MAINTENANCE .
6
3
7
2
4
5
1

Tetra Pak
Hoyer
4-18 B
F60 03 D 04
4.2.2 Ice cream intake and outlet connection
Connect the mix supply pipe to the mix pump
inlet connection (6) on the front of the machine.
The machine has a CIP washing programme
permitting thorough, safe washing of the machine
without dismantling its parts; it will therefore be
necessary to prepare the required connections
between the CIP washing pump and solutions and
the mix pipe.
Make sure that the mix flows “spontaneously”
to the machine connection (6), and does not need
to be suctioned by the freezer pump; this may be
done by simply positioning the aging vats higher
than the freezer (check that the spontaneously
flowing supply is sufficient even when the mix
level in the containers is low), or by installing a
suitable centrifugal pump close to the vats. Take
care to ensure that there is no air getting into the
pipes, which could pollute the product and result
in fluctuation of ice cream overrun.
CAUTION:
Pipes must be dismantled and washed
thoroughly after completing this procedure
to ensure that no hard solid particles are
conveyed toward the freezer mix pump. This
is very important as solid particles such as
metal burr or welding residues could severely
damage the freezer pump and will invalidate
the guarantee.
Connect up the ice cream outlet (7) to the utility.
Use the shortest possible pipe, with as few
curves as possible, and use a pipe which is shiny
inside; the pipe does not need to be insulated.
Make sure that ice cream pressure in the
cylinders does not exceed 12 bar (the absolute
maximum permitted value); if this should occur,
move the freezer closer to the ice cream utility
and/or use hot gas to produce softer ice cream.
Connect the compressed air supply pipe to the
connection on the rear of the machine; it is
recommended that an easily removable tap and
connection be assembled close to the machine
connection.
The supply pressure measured on the machine
4.2.3 Compressed air connection
must never drop below 6 bar. It is strongly
recommended that the compressed air supply
in the place of installation be fitted with an air
drying system and A0 filters to remove oil
vapours and residual fine particles.
CAUTION:
Electrical connection must be made
exclusively by competent technicians who are
familiar with safety legislation and authorised
to perform and certify electrical installations.
Check the identification plate to make sure that
the machine is compatible with the site’s power
supply. Connect the machine’s power supply to
the site’s distribution panel and protect it with a
4.2.4 Electrical connection
suitable device, complying with all regulations
for correct electrical installation in effect in the
place of installation.
We recommend installing an automatic circuit
breaker on the distribution panel, complying
with local regulations.