Bartscher B20 User manual

ICE MAKERS
FABBRICATORE DI
GHIACCIO A CUBETTI
MACHINE À GLACE
EN CUBES
EISWÜRFELBEREITER
(Würfelform)
INSTRUCTION MANUAL
LIBRETTO ISTRUZIONE
MANUEL DE ISTRUCTION
BETRIEBSHANDBUCH
104322 B20
104337 B40
104347 B45
104382 B75
104392 B90
71503133/0 - BARTSCHER - 09-2014-ALL

TABLE OF CONTENTS PAGE INDICE PAG TABLE DES MATIERES PAGE INHALT SEITE
GENERAL INFORMATION INFORMAZIONI GENERALI INFORMATIONS GENERALES ALLGEMEINES UND
AND INSTALLATION 1 ED INSTALLAZIONE 12 ET INSTALLATION 23 INSTALLATION 34
Introduction 1 Introduzione 12 Introduction 23 Einleitung 34
Unpacking and inspection 1 Disimballaggio ed ispezione 12 Déballage et examen 23 Auspacken und Kontrollieren 34
Location and levelling 1
Posizionamento e livellamento 12 Logement et mise de niveau 23 Stellplatz und Aufstellung 34
Electrical connection 2 Collegamenti elettrici 13 Branchement électrique 24 Elektrische Anschlüsse 35
Water supply and drain Alimentazione idraulica Branchement d’arrivée Wasserversorgung und
connection 2 e scarico 13 et d’évacuation eau 24 Abflußleitungen 35
Final check list 3 Controllo finale 14 Liste de contrôle final 25 Endkontrolle 36
Installation practice 3 Schema di installazione 14 Schema d’installation 25 Installation 36
OPERATING INSTRUCTION 4 ISTRUZIONI DI 15 MISE EN SERVICE 26 BETRIEBSANLEITUNG 37
FUNZIONAMENTO
Start up 4 Avviamento 15 Démarrage 26 Inbetriebnahme 37
Operational checks 4 Controlli durante il funzion. 15
Contrôle pendant le fonctionn. 26 Kontrolle bei Betrieb 37
OPERATING PRINCIPLES 6 PRINCIPIO DI 17 PRINCIPE DE 28 BETRIEB 39
FUNZIONAMENTO FONCTIONNEMENT
Freezing cycle 6 Ciclo di congelamento 17 Cycle de congélation 28 Gefrierzyklus 39
Harvest cycle 6 Ciclo di scongelamento 17 Cycle de démoulage 28 Abtauzyklus 39
CLEANING INSTRUCTIONS OF ISTRUZIONI PER LA PULIZIA
INSTRUCTION DE NETTOYAGE ANWEISUNGEN ZUR
WATER SYSTEM 9 DEL CIRCUITO IDRAULICO 20
DU CIRCUIT HYDRAULIQUE 32 WARTUNG UND REINIGUNG 42
a)

Serie B - Würfelform
B20
20 kg
17 kg
333 mm
(599) mm
457 mm
6 kg
28 kg / 33 kg
400x530x690
15
B40 B75B45
R134a
467 mm
(690) mm
570 mm
15 kg
39 kg
35 kg
24
35 kg / 41 kg
540x640x800
R404a
467 mm
570 mm
22 kg
912(790) mm
46 kg
44 kg
32
38 kg / 44 kg
R404a
540x640x900
700 mm
600 mm
40 kg
1022(900) mm
88 kg
80 kg
56 kg / 65 kg
R404a
770x680x990
56
B90
535 mm
600 mm
40 kg
1033(910) mm
75 kg
70 kg
44
45 kg / 53 kg
R404a
610x680x1080
Eisproduktion (10°C / 10°C)
Eisproduktion (21°C / 15°C)
Abmessungen
Externe Breite
Externe Höhe mit Füße(ohne Füße)
Tiefe
Vorratsbehälter
Netto Gewicht / Brutto
Verpackungsabmessungen
Eiswürfel Programm
Kältemittel
MODELL
BxTxH (mm)

B20
B40
Abmessungen

B45
B75
Abmessungen

B90 Abmessungen

d)

e)
TECHNICAL SPECIFICATIONS - SPECIFICHE TECNICHE - DONNÉES TECHNIQUE - TECHNISCHE ANGABEN
B 20 B 40 B45 B75 B90
Voltage Tension 230/50/1 230/50/1 230/50/1 230/50/1 230/50/1
Tension -10 / +10% -10 /+10% -10 / +10% -10 / +10% -10 / +10% Spannung Condensation Condensazione Condensation Air Water Air Water Air Water Air Water Air Water
Kühlung Bin capacity (kg)
Capacità contenitore (kg) Capacité bac glaçons (kg)
6 15 22 39 39
Lademenge (kg) Cubes per cycle Cubetti per ciclo Glaçons par cycle 15 24 32 44 56
Würfel per Zyklus Running amps Amperaggio di marcia Ampérage en marche 1,9 2,7 2,7 4,3 4,3
Ampere Starting amps Amperaggio avviamento Ampérage de démarrage 9,7 15,5 15,5 19,4 19,4
Start Ampere Power - Watt Potenza - Watt Puissance - Watt 280 200 410 360 550 450 690 630 860 600
Leistung - Watt
Power cons. in 24 hrs - Kwh Consumo elettr. in 24 ore - Kwh Cons. electr. en 24 hrs - Kwh
6,5 5,4 9,3 7,9 9,9 8,5 14,6 13,1 15,8 13
Stromverbrauch in 24 Std. - kWh Water consumption - lt/hr Consumo acqua - lt/ora Consommation eau - lt/hr 3 21 5 38 6 46 8,5 40 8,5 38
Wasserverbrauch - lt/hr Wire size - mmq Sezione cavi - mmq Section fils - mmq 3 x 1,5 3 x 1,5 3 x 1,5 3 x 1,5 3 x 1,5 Kabelstärke - mmq
Refrigerant metering device Disp. espansione refrigerante
Détente du Rèfrigérant Capillary tube Capillary tube Capillary tube Capillary tube Capillary tube Kühlmittel - Expansionssystem

e / bis)
TECHNICAL SPECIFICATIONS - SPECIFICHE TECNICHE - DONNÉES TECHNIQUE - TECHNISCHE ANGABEN
B 20 B 40 B 45 B 75 B 90
Refrigerant Refrigerante Réfrigérant R134A R404A R404A R404A R404A Kühlmittel Refrig. charge - gr Carica refrig. - gr Charge refrig. - gr 190 160 210 210 250 260 350 310 340 320
Kühlmittel - Füll.
- gr
Hi pressure - Freezing cycle - bar Press. mandata - ciclo congel. - bar Haute pression cycle congel. - bar 7-11* 7-10# 13-18* 11,5-16# 14-21,5* 11-17# 13-17,5* 17# 13,5-16,5* 15# Hochdrückbereich - Gefrierfase - bar Suction pressure - End freezing cycle - bar Press. aspiraz. - Fine ciclo cong. - bar Bas pression . Fin cycle congel. - bar
0-0,1 1,2 1,3 1,1 1,4 1,5 1,9
Niederdrückbereich - Gefrierfase - bar
*) 21°C - Room Temperature - Temperatura ambiente - Temperature ambience - #) 15°C - Water inlet temperature - Temperatura entrata acqua - Temperature arrivé eau

B20 - B 40 - B 45
WIRING DIAGRAM - SCHEMA ELETTRICO - SCHÉMA ÉLECTRIQUE - SCHALTUNGSSCHEMA
AIR & WATER COOLED - RAFFREDDAMENTO AD ARIA ED AD ACQUA.
REFROIDISSEMENT A AIR ET A EAU - LUFT- UND WASSERGEKÜHLT
230/50-60/1
f)

g)
WIRING DIAGRAM - SCHEMA ELETTRICO - SCHÉMA ÉLECTRIQUE - SCHALTUNGSSCHEMA
ELECTRONIC TIMER VERSION - VERSIONE CON TIMER ELETTRONICO
230/50-60/1
B 75 - B 90

h)

Capacità di produzione - Ice making capacity - Capacité de production - Eisproduktionskapazität
i)
20
19
18
17
16
15
14
13
12
11
10
Kg.
RAFFREDDAMENTO AD ARIA - AIR COOLED MODELS
CONDENSATION PAR AIR - LUFTKÜHLUNG
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
°C
10
21
32
38
B 20
27 21 1532 10
21
20
19
18
17
16
15
14
13
12
11
Kg.
RAFFREDDAMENTO AD ACQUA - WATER COOLED MODELS
CONDENSATION PAR EAU - WASSERKÜHLUNG
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
°C
10
21
32
38
27 21 1532 10
B 45
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
Kg.
RAFFREDDAMENTO AD ARIA - AIR COOLED MODELS
CONDENSATION PAR AIR - LUFTKÜHLUNG
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
°C
10
21
32
38
RAFFREDDAMENTO AD ACQUA - WATER COOLED MODELS
27 21 15 1032
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
CONDENSATION PAR EAU - WASSERKÜHLUNG
Kg. °C
10
21
32
38
27 21 15 1032
B 40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
RAFFREDDAMENTO AD ACQUA - WATER COOLED MODELS
CONDENSATION PAR EAU - WASSERKÜHLUNG
Kg. °C
10
21
38
27 21 15 1032
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
Kg.
RAFFREDDAMENTO AD ARIA - AIR COOLED MODELS
CONDENSATION PAR AIR - LUFTKÜHLUNG
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
°C
10
21
32
38
27 21 15 1032

Capacità di produzione - Ice making capacity - Capacité de production - Eisproduktionskapazität
m)
B 75
76
74
72
70
68
66
64
62
60
58
56
54
52
50
48
46
44
Kg.
RAFFREDDAMENTO AD ARIA - AIR COOLED MODELS
CONDENSATION PAR AIR - LUFTKÜHLUNG
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
°C
10
32
38
RAFFREDDAMENTO AD ACQUA - WATER COOLED MODELS
27 21 15 1032
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
CONDENSATION PAR EAU - WASSERKÜHLUNG
Kg. °C
10
21
32
38
27 21 15 1032
B 90
88
86
84
82
80
78
76
74
72
70
68
66
64
62
60
58
56
54
Kg.
RAFFREDDAMENTO AD ARIA - AIR COOLED MODELS
CONDENSATION PAR AIR - LUFTKÜHLUNG
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
°C
10
21
32
38
27 21 15 1032
86
84
82
80
78
76
74
72
70
68
66
64
62
60
TEMPERATURA ACQUA - WATER TEMPERATURE
TEMPÉRATURE DE L'EAU - WASSERTEMPERATUR
TEMPERATURA AMBIENTE - AMBIENT TEMPERATURE
TEMPÉRATURE AMBIANT - RAUMTEMPERATUR
PRODUZIONE GHIACCIO PER 24 ORE - ICE PRODUCED PER 24 HRS.
PRODUCTION DE GLACE PAR 24 HEURES - EISWÜRFELPRODUKTION IN 24 STD.
RAFFREDDAMENTO AD ACQUA - WATER COOLED MODELS
CONDENSATION PAR EAU - WASSERKÜHLUNG
Kg. °C
10
21
32
38
27 21 15 1032

7. See data plate on the rear side of the unit
and check that local main voltage corresponds
with the voltage specified on it.
CAUTION. Incorrect voltage supplied to
the icemaker will void your parts
replacement program.
8. Remove the manufacturer’s registration
card from the inside of the User Manual and fill-
in all parts including: Model and Serial Number
taken from the data plate.
Forward the completed self-addressed
registration card to the factory.
C. LOCATION AND LEVELLING
WARNING.ThisIceCuberisdesignedfor
indoorinstallationonly.Extendedperiods
of operation at temperatures exceeding
the following limitations will constitute
misuse under the terms of the
Manufacturer’s Limited Warranty
resulting in LOSS of warranty coverage.
1. Position the unit in the selected permanent
location.
Criteria for selection of location include:
a) Minimumroomtemperature10°C(50°F)
and maximum room temperature 40°C (100°F).
b) Waterinlettemperatures: minimum5°C
(40°F) and maximum 35°C (90°F).
c) Well ventilated location for air cooled
models. Clean the air cooled condenser at
frequent intervals.
d) Service access: adequate space must
beleftforallserviceconnectionsthroughtherear
of the ice maker. A minimum clearance of 15 cm
(6")mustbeleftatthesidesoftheunitforrouting
cooling air drawn into and exhausted out of the
compartment to maintain proper condensing
operation of air cooled models.
NOTE. With the unit in “built-in” conditions,
the ice production is gradually reduced in
respect to the levels shown in the graph, up
to a maximum of 10% at room temperatures
higher than 32 ° C.
The daily ice-making capacity is directly
related to the condenser air inlet temperatu-
re,watertemperatureandageofthemachine.
To keep your CUBER at peak performance
levels, periodic maintenance checks must
be carried out as indicated on Cleaning
Section of this manual.
2. Level the unit in both the left to right and
front to rear directions.
Page 1
GENERAL INFORMATION
AND INSTALLATION
A. INTRODUCTION
These Cubers are quality designed, engineered
and manufactured.
Their ice making systems are thoroughly tested
providing the utmost in flexibility to fit the needs
of a particular user.
These ice makers have been engineered to our
own rigid safety and performence standards.
NOTE. Toretainthesafetyandperformance
built into this icemaker, it is important that
installation and maintenance be conducted
in the manner outlined in this manual.
B. UNPACKING AND INSPECTION
1. Visually inspect the exterior of the packing
and skid. Any severe damage noted should be
reportedtothedeliveringcarrierandaconcealed
damageclaimformfilledinsubjettoinspectionof
the contents with the carrier’s representative
present.
2. a)Cutandremovetheplasticstripsecuring
the carton box to the skid.
b) Cut open the top of the carton and
remove the polystyre protection sheet.
c) Pull out the polystyre posts from the
corners and then remove the carton.
3. Removethefrontandtherearpanelsofthe
unit and inspect for any concealed damage.
Notify carrier of your claim for the concealed
damage as stated in step 1 above.
4. Open the bin door and remove all internal
support packing and masking tape.
5. Check that refrigerant lines do not rub
againstortouch otherlines or surfaces,and that
the fan blade moves freely.
6. Use clean damp cloth to wipe the surfaces
inside the storage bin and the outside of the
cabinet.

Page 2
D. ELECTRICAL CONNECTIONS
See data plate for current requirements to
determine wire size to be used on electrical
connections.Allicemakersrequirea solidearth
wire.
The ice machines are supplied from the factory
completely pre-wired and require only electrical
power connections to wire cord provided on the
back of the unit.
Make sure that the ice machine is connected to
its own circuit and individually fused (see data
plate for fuse size).
Themaximumallowablevoltagevariationshould
not exceed -10% and +10% of the data plate
rating. Low voltage can cause faulty functioning
and may be responsible for serious damage to
the overload switch and motor windings.
NOTE. All external wiring should conform to
national, state and local standards and
regulations.
Checkvoltageonthelineandtheicemaker’s
data plate before connecting the unit.
E. WATER SUPPLY AND DRAIN
CONNECTIONS
General
Whenchoosingthewatersupplyfortheicecuber
consideration should be given to:
a) Length of run
b) Water clarity and purity
c) Adequate water supply pressure
Sincewateristhemostimportantsingleingredient
in producting ice you cannot emphasize too
much the three items listed above.
Low water pressure, below 1 bar may cause
malfunction of the ice maker unit.
Water containing excessive minerals will tend to
produce cloudy coloured ice cubes, plus scale
built-up on parts of the water system.
Water supply
Connect the 3/4" male fitting of the solenoid
waterinletvalve,usingtheflexiblehosesupplied,
tothecoldwatersupplylinewithregularplumbing
fitting and a shut-off valve installed in an
accessible position between the water supply
line and the unit.
Water supply - Water cooled models
(B75 - B90)
The water cooled versions of series 75 and 90
requiretwoseparateinletwatersupplies,onefor
the water sprayed for making the ice cubes and
the other for the water cooled condenser.
Connect the 3/4" male fitting of the water
regulating valve using the flexible hose supplied
with the unit to the cold water supply line with
regular plumbing fitting and a shut-off valve
installed in an accessible position between the
water supply line and the unit.
Water drain
The recommended drain tube is a plastic or
flexible tube with 18 mm (3/4") I.D. runs to an
open trapped and vented drain. When the drain
is a long run, allow 3 cm pitch per meter (1/4"
pitch per foot).
Averticalopenvent,attheunitdrainconnection,
is also required for proper sump drainage.
Water drain - Water cooled models
The water drain line from the condenser, on
water cooled versions, is internally connected
with the drain fitting of the unit.
It is strongly recommended therefore to install a
vertical open vent on unit drain line high point to
ensure good draining and to direct the drain line
to a trapped and vented floor drain receptacle.
This to make sure of the proper flow of the
drained water as, in case of poor drainage, the
water ranning out from the condenser may
inopportunelyflow,throughtheunit draintubing,
into the ice storage bin.
NOTE. Thewatersupplyandthewaterdrain
must be installed to conform with the local
code. In some case a licensed plumber and/
or a plumbing permit is required.

F. FINAL CHECK LIST
1. Is the unit in a room where ambient
temperatures are within a minimum of 10°C
(50°F) even in winter months?
2. Is there at least a 15 cm (6") clearance
around the unit for proper air circulation?
3. Is the unit level? (IMPORTANT)
4. Have all the electrical and plumbing
connectionsbeen made,andisthewatersupply
shut-off valve open?
5. Has the voltage been tested and checked
against the data plate rating?
6. Has the water supply pressure been
checked to ensure a water pressure of at least
G. INSTALLATION PRACTICE
1. Hand shut-off valve
2. Water filter
3. Water supply line (flexible hose)
4. 3/4" male fitting
5. Vented drain
6. Open trapped vented drain
7. Drain fitting
8. Main switch
9. Power line
1 bar (14 psi).
7. Checkall refrigerantlinesandconduitlines
to guard against vibrations and possible failure.
8. Have the bin liner and cabinet been wiped
clean?
9. Has the owner/user been given the User
Manualandbeeninstructedontheimportanceof
periodic maintenance checks?
10. Has the Manufacturer’s registration card
been filled in properly? Check for correct model
and serial number against the serial plate and
mail the registration card to the factory.
11. Has the owner been given the name and
the phone number of the authorized Service
Agency serving him?
WARNING. This icemaker is not designed for outdoor installation and will not function in
ambient temperatures below 10°C (50°F) or above 40°C (100°F).
This icemaker will malfunction with water temperatures below 5°C (40°F) or above 35°C
(90°F).
Page 3

OPERATING INSTRUCTIONS
START UP
Afterhavingcorrectlyinstalledtheicemakerand
completed the plumbing and electrical
connections, perform the following “Start-up”
procedure.
B20 - B40 - B45
A. Remove the unit front panel and locate the
cleaning switch on the control box.
B. Set the cleaning switch in the cleaning
position(II).Thiswillclosetheelectricalcircuitto
the water inlet valve and to the hot gas valve.
C. SwitchONthepowerlinedisconnectswitch.
Unit will start up in water filling phase mode.
During this phase the components energized
are:
WATER INLET SOLENOID VALVE
HOT GAS SOLENOID VALVE
TheWater pump and the Fan motor arealso in
operation.
D. Let unit stay in water filling phase mode for
about three/four minutes till water is coming out
from the drain hose, then move the cleaning
switch to the operation position (I).
B75 - B90
A. Give power to the unit to start it up by
switchingONthepowerlinemainswitch;theunit
will start automatically in defrost cycle with the
following components energized:
WATER INLET SOLENOID VALVE
HOT GAS VALVE
COMPRESSOR
ELECTRONIC TIMER
NOTE. During the defrost cycle, the water
inlet solenoid valve is energized. The water
flowsthroughthevalvetothebacksideofthe
evaporatorplatenandthendowntofillupthe
icemakersumptankforthenextfreezingcycle.
OPERATIONAL CHECKS
A. The unit now starts its first freezing cycle
with the following components in operation:
COMPRESSOR
WATER PUMP
FAN MOTOR in air cooled version
B. Check to see through the ice discharge
openingthatthespraysystemiscorrectlyseated
and that the water jets uniformely reach the
interioroftheinvertedcupmolds;alsomakesure
thattheplasticcurtainishangingfreelyandthere
is not excessive water spilling through it.
C. Theicemakingprocesstakesplacethereby,
with the water sprayed into the molds that gets
gradually refrigerated by the heat exchanged
with the refrigerant flowing into the evaporator
serpentine.
D. On units B20 - B40 - B45 when the
evaporator temperature reaches a preset value
the evaporator thermostat or cube size control
changes its contacts; the freezing cycle ends
andstartsthedefrostorharvestcycle.
E. On models B75 - B90 freezing cycle is
completed through an electronic timer
energized by the evaporator thermostat. It
starts when the cube size thermostat/control
bulb (pig tail) located on the evaporator
serpentine reaches a temperature of approx.
-15°C (5°F) .
On units B75 - B90 the
additional Time (8') of the freezing cycle
startswhenthecube size thermostatcontrol
bulb (pig tail) located on the evaporator coil
reaches a temperature of approx. -15 ° C.
Freezing time will range between 20 and 22
minutes in a 21 ° C ambient temperature,
longer if above this temperature and shorter
if below.Then the unit goes directly into the
Defrost Cycle. The average complete cycle
time is between 23 and 25 minutes.
F. Check,duringthefirstdefrost/harvestcycle,
that the incoming water flows correctly into the
sumpreservoirinordertore-fillitandthe surplus
overflows through the overflow drain tube.
G. Checkthetextureoficecubesjustreleased.
Right size must have a small depression (about
5-6 mm) in their crown.
If not, wait for the second defrost/harvest cycle
before performing any adjustment.
H. If required on model B20 - B40 and B45, the
length of the freezing cycle can be modified by
turning the knob of the cube size control or
evaporator thermostat located in front of the
machineuntilthedesiredsizeisachieved.
Page 4

If it is thought necessary, the above situations
can be rectified by, in the first case, turning the
control knob (as little or as much as is required)
clockwise and, in the second case, turning the
knob to the right counterclockwise.
It should, however, be remembered that if the
room temperature returns later to the 20 ÷30°C
range, the knob indicator must once again be
turned to the previous position.
If the ice cubes are shallow and cloudy, it is
possible that the ice maker runs short of water
duringtheendofthefreezingcycleor,thequality
of the supplied water requires the use of an
appropriate water filter or conditioner.
I. At the end of the defrost or harvest cycle
holdahandfuloficecubesagainstthebulbofthe
storagebinthermostat;theicemakerswitchOFF
in about one-two minutes.
Takeouttheicefromthestoragebinthermostat.
The ice maker should restart automatically in
three-four minutes.
NOTE. The bin thermostat is factory set at
1 ° C (35 ° F) OUT and 4 ° C (39 ° F) IN.
K. Re-fit the unit front panel then instruct the
owner/user on the general operation of the ice
machine and about the cleaning and care it
requires.
Page 5
• If the tempera-
tureof theroom in
whichthemachine
is place is below
20°C, the cubes
will tend to be
partly hollowed
out (see fig. on
right).
• If, on the other
hand, the room
temperature is
above 30°C the
cubes produced
will have a jagged
rim of ice around
the crown.

PRINCIPLE OF OPERATION
How it works
Intheice makers thewater used tomake the ice
is kept constantly in circulation by a water pump
whichprimes ittothe spraysystemnozzlesfrom
whereitisdivertedintotheinvertedcupmoldsof
the evaporator (Fig. A).
Asmallquantityofthesprayedwaterfreezesinto
ice; the rest of it cascades by gravity into the
sump assembly below for recirculation.
FREEZING CYCLE (Fig. B)
The hot gas refrigerant discharged out from the
compressorreachesthecondenserwhere,being
cooleddown,condensesintoliquid.Flowinginto
the liquid line it passes through the drier/filter,
thenitgoesallthewaythroughthecapillarytube
where it looses its pressure.
Next the refrigerant enters into the evaporator
serpentine(whichhasalargerdiameterthenthe
capillary tube) and starts to boil off; this reaction
is emphasized by the heat transferred by the
sprayed water.
The refrigerant then increases in volume and
changes entirely into vapor.
The vapor refrigerant then passes through the
suction accumulator (used to prevent that any
small amount of liquid refrigerant may reach the
compressor)andthroughthesuctionline.Inboth
theaccumulatorandthesuctionlineitexchanges
heatwith therefrigerantflowingintothecapillary
tube (warmer), before to be sucked in the
compressor and to be recirculated as hot
compressed refrigerant gas.
The freezing cycle on B20 -B40 and B45 is
controlledbyonlytheevaporator thermostat
which has its bulb in contact with the
evaporator serpentine while in B75 and B90
thereisansecondphasecontrolledby an
electronic timer.
The electrical components in operation during
the freezing cycle are:
COMPRESSOR
WATER PUMP
FAN MOTOR (in air cooled version)
On B20 aircooledversions(operating with
R134a) the refrigerant head pressure is
gradually reduced from the value of approx. 11
bar at beginning of the freezing cycle with the
machine at 21°C ambient temperature, to a
minimumvalue ofapprox.7 barjustattheendof
thefreezingcycle,fewsecondsbeforethestarting
of the defrost cycle.
OnB40,andB45 aircooledversion operating
with R404A, the head pressure drops from
19,5 bar to 13 bar while on the other bigger
models (B75-B90) the refrigerant head
pressure is kept between two present values
(17-13,5 bar) by means of a fan pressure
control.
The declining of the pressure is relied to the
reduction of the evaporating pressure, caused
by the progressive growth of the ice thickness
into the inverted cup molds and to the flow of air
drown through the air cooled condenser by the
fan motor. The above values are in relation as
welltotheambienttemperature ofthe icemaker
site and they are subject to rise with the increase
of this temperature. On B20 water cooled
versions (operating with R134a) the
refrigerant head pressure ranges between 8,5
and 10 bar being controlled by an automatic hi
pressure control that energizes a water solenoid
valve located on the water line to the condenser,
which rates the cooling water to the condenser
while on models B40, and B45 water cooled
version operating with R404A, the head pressure
ranges between 12 and 17 bar. On B75 and
B90 water cooled version operating with
R404A, the head pressure is constant at 15
barcontrolledbyawaterregulating valve.
At starting of the freezing cycle the refrigerant
suction or lo-pressure lowers rapidly to 1,0 bar
(on B20) and to 2,5-3,0 bar on all other models
then it declines gradually – in relation with the
growing of the ice thickness – to reach, at the
end of the cycle, approx. 0-0,1 bar on B20 and
1,4-1,5 bar in the other models with the cubes
fully formed in the cup molds.
DEFROST OR HARVEST CYCLE (Fig. D)
On B20 - B40 and B45 the temperature of
the evaporator thermostat, in contact with the
evaporator serpentine, drops to a pre-set value
it changes its electrical contacts energizing the
herebelow shown components.(OnB75 and
B90 whenthe electro-nic timer completes the
second portion of the freezing it changes
its electrical contacts energizing the same
components).
COMPRESSOR
WATER INLET SOLENOID VALVE
HOT GAS SOLENOID VALVE
The incoming water, passing through the water
inlet valve and the flow control, runs over the
evaporator platen and then flows by gravity
through the dribbler holes down into the sump/
reservoir (Fig. C).
Thewaterfillingthesump/reservoirforcespartof
the surplus water from the previous freezing
cycletogooutto thewaste throughthe overflow
pipe. This overflow limits the level of the sump
water which will be used to produce the next
batch of ice cubes.
Meanwhiletherefrigerant,ashotgasdischarged
from the compressor, flows through the hot gas
valve directly into the evaporator serpentine by-
passing the condenser.
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