ITV ICE MAKERS ALFA Operating manual

NG DP
TECHNICAL SERVICE MANUAL
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4
TECHNICAL SERVICE MANUAL
NG DP
MODELS:
ALFA –GALA –DELTA –SUPER STAR
NDP
20
NG DP
30
NG DP
35
NG DP
45
NG DP
60
NG DP
80
NG DP 110
NG DP 150
NG MDP 150 (MODULAR)
CAREFULLY READ THE INSTRUCTIONS CONTAINED IN THIS MANUAL SINCE THEY
PROVIDE IMPORTANT INFORMATION RELATIVE TO SAFETY DURING INSTALLATION,
USE, AND MAINTENANCE.
THIS APPLIANCE SHOULD BE INSTALLED BY APPROVED TECHNICAL SERVICE
PERSONNEL.

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TECHNICAL SERVICE MANUAL
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TABLE OF CONTENTS
1. INTRODUCTION............................................................................................................................................... 3
1.1. Warnings..................................................................................................................................................... 3
1.2. Descripción................................................................................................................................................. 4
1.3. Operating principle .................................................................................................................................... 4
1.4. Wiring diagrams......................................................................................................................................... 6
2. SPECIFICATIONS............................................................................................................................................. 8
2.1. Production Tables.................................................................................................................................... 11
3. DELIVERY AND UNPACKING...................................................................................................................... 15
4. INSTALLATION ............................................................................................................................................... 16
4.1. Recommended Placement of Unit ........................................................................................................ 16
4.2. Water and Drainage................................................................................................................................ 17
4.3. Electrical connection............................................................................................................................... 17
5. OPERATION.................................................................................................................................................... 18
5.1. Preliminary Checks.................................................................................................................................. 18
5.2. Starting up ................................................................................................................................................ 18
6. ADJUSTMENTS.............................................................................................................................................. 19
6.1. Condenser water valve pressostat........................................................................................................ 19
6.2. Fan pressostat (air–cooled models)..................................................................................................... 19
7. MAINTENANCE AND CLEANING INSTRUCTIONS................................................................................. 21
8. MAINTENANCE AND CLEANING PROCEDURES................................................................................... 22
8.1. Water condenser ..................................................................................................................................... 22
8.2. Air condenser........................................................................................................................................... 22
8.3. Evaporator / Water Through................................................................................................................... 22
8.4. Cleaning the ice bin................................................................................................................................. 23
8.5. Cleaning the outside of the machine .................................................................................................... 23
8.6. Spray nozzles and connecting pipes.................................................................................................... 24
8.7. Cleaning the water inlet filters................................................................................................................ 24
8.8. Checking for water leaks........................................................................................................................ 24
9. SPECIAL ADVICE CONCERNING R-404 REFRIGERANT ..................................................................... 25
10. TROUBLESHOOTING................................................................................................................................ 26

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TECHNICAL SERVICE MANUAL
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1. INTRODUCTION
Thank you for choosing ITV's NG DP Ice Cube Maker.
You have purchased one of the most reliable ice-making products on the market today.
Carefully read the instructions contained in this manual since they provide important information
relative to safety during installation, use, and maintenance.
1.1. Warnings
This appliance should be installed by approved Technical Service Personnel.
This plug should be accessible at all times.
To reduce the risk of electrical shock, ALWAYS disconnect the machine BEFORE cleaning or
maintaining the equipment. Do not attempt to install, service, or modify this machine. Improper
use by other than specially trained technicians is extremely dangerous and may result in a fire
or electric shock.
This machine should not be placed outdoors or exposed to rain.
Connect to drinking water mains.
This appliance is not intended for use by young children or infirm persons without supervision.
Young children should be supervised to ensure that they do not play with the appliance.
IMPORTANT!
• DO NOT ATTEMPT TO SERVICE THIS MACHINE AS IT IS DANGEROUS AND COULD
CAUSE SEVERE DAMAGE TO THE UNIT.
•SERVICE SHOULD ONLY BE CARRIED OUT BY TRAINED, QUALIFIED PERSONNEL.
•WE STRONGLY RECOMMEND USING ONLY ORIGINAL REPLACEMENT PARTS
AVAILABLE FROM AN AUTHORIZED DISTRIBUTOR.
•WASTE AND OTHER MATERIAL SHOULD BE DISPOSED OF ACCORDING TO LOCAL
REGULATIONS AND PROCEDURES FOR WASTE DISPOSAL.
•CLEANING AND MAINTENANCE ARE NOT COVERED BY THE WARRANTY.

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TECHNICAL SERVICE MANUAL
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1.2. Descripción
Main Features of the Machine
 Stainless steel body AISI 304 and chapa galvanizada.
 Anti-blocking spray nozzles.
 Pump without seals.
 High pressure safety pressostats even in air-cooled machine.
 Large condensers (work well at high ambient temperatures; and reduce cooling water
consumption in water-cooled machines).
 TRANSPARENT CUBES with most of the water mains.
ALFA CUBE GALA CUBE DELTA CUBE SUPER STAR CUBE
1.3. Operatingprinciple
WHEN SWITCHING ON THE MACHINE FOR THE FIRST TIME, THE MACHINE SHOULD BE
PLACED ON THE DEFROSTING STAGE. To do so, turn the wheels on the timer until the
microswitches are depressed.
- At this moment, the compressor is working; the water inlet valve and hot gas inlet valve are
both open. The water bin fills with water, any excess is lost via the maximum level overflow.
- After a period of time controlled by the timer the hot gas valve and water inlet valve are closed.
The pump then sends water to the evaporator where the ices cubes are gradually formed. The
evaporation temperature slowly descends until it reaches a point where the cycle thermostat is
connected and starts the timer. Once this time has elapsed, the defrosting stage (3-4 minutes)
begins. The pump is off and the hot gas and water valves are open. Some water is sent to the
top of the evaporator to help the cubes unstick.

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TECHNICAL SERVICE MANUAL
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- Once the defrosting stage is over, the cycle begins again, and so it continues until the bin is
full of ice, and contact between the bin thermostat situated at the top of the bin and the ice will
stop the machine. The bin thermostat will never stop the machine in mid-cycle.
OPERATING PRINCIPLE FOLLOWING THE ELECTRIC DIAGRAM (TIMER ON DEFROST -
MICROSWITCHESDEPRESSED).
- The ITV model NG has two switches:
1st In the frontal side of the machine (with led). This turns the machine on or off when we press
it.
2nd The second switch is located in the electrical panel. This one stops the condensing unit, but
keeps the hydraulic part in operation and allows to do the cleaning of the machine (except in
NDP20model).
- Current reaches the machine via the line connecting the blue (1) and brown (2) terminals. The
brown wire connects the compressor and timer motor. The blue wire connects bin thermostat T1
which closes the circuit with 2. A different blue wire goes to 2 on terminal G1 which at this
moment is connecting 1 and 4.
- A red wire connects bin thermostat T1 and micros G1 and G2 which close the circuit with 4
and provide current via G1 to the timer G.
- At this point the following are connected:
❖COMPRESSOR(S)
❖WATER INLET VALVE (P)
❖HOT GAS VALVE (Q)
❖TIMER MOTOR (G)
- Since the motor of the timer (G) is working, during 13 minutes the roler of micro of the second
water inlet coil (cleaning valve drive) is depressed until the pins release the micro, closing this
valve.
- After 2 to 4 minutes micros G1 and G2 will open and close circuits 1-2.

NG DP
TECHNICAL SERVICE MANUAL
- Via terminal 2 on micro G2, current reaches the pump. Circuit 4 on micro G2 which provides
current to the hot gas valve (Q) and water inlet valve (P) will be interrupted. Since the thermostat
is between 1 and 3 the timer will receive no current. The compressor continues switched on.
- Air-cooled machines have a fan (R) which is controlled by the pressostat (F).
- In water-cooled models without pressostatic valve, pressostat (J) opens and closes the
condenser electrovalve (K).
- Evaporator temperature decreases until the cycle thermostat (T2) set point is reached, at this
temperature circuit 1-2 will be closed and timer motor (G) will switch on.
- Once the cycle is over, the pins on the timer wheels will force the micros to change circuits,
stopping the pump and opening the hot gas valve and water valve. The combined effect of hot
gas and water sprayed on the top of the evaporator will release the ice cubes and change the
position of the cycle thermostat (T2).
- The ice production and defrosting cycle will continue until the ice storage bin is full, at which
point cycle thermostat (T1) will disconnect the machine, but never during a cycle, but at the
beginning of the defrosting stage, since during the production cycle, current will reach the pump
via terminals 1-2 of micro G1.
- The machine will remain disconnected until the level of ice in the bin drops below the
thermostat because of ice consumption. At this point the bin thermostat T1 changes and the
machine will start a new production cycle automatically.

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TECHNICAL SERVICE MANUAL
1.4. Wiring diagrams
7

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TECHNICAL SERVICE MANUAL
2. SPECIFICATIONS
NDP 20
NG DP 30 - 150
8

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TECHNICAL SERVICE MANUAL
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8
0
5
NG MDP 150
MODEL
CONSUMP.
WATER
COND..
L/HOUR (1)
CONSUMP.
WATER
PROD.
L/HOUR (1)
CONSUMP.
TOTAL
WATER
L/HOUR (1)
NET
WEIGHT
(KG)
DIMENSIONS
MACHINE
DIMENSIONS
PACKAGING
X*Y*Z
GROSS
WEIGHT
(KG)
VOLUME
(M3)
NDP 20 A
5.1
5.1
36
350x474x592
420x540x725
35
0.20
NDP 20W
18
5.1
23.1
36
350x474x592
420x540x725
35
0.20
NG 30 A
14
14
39
405x560x770
485x610x790
45
NG 30W
20
14
34
39
405x560x770
485x610x790
45
NG 35 A
14
14
42
465x595x795
525x645x920
50
NG 35 W
20
14
34
42
465x595x795
525x645x920
50
NG DP 45 A
18.8
18.8
45
465x595x795
525x645x920
53
NG DP 45 W
24
18.8
42.8
45
465x595x795
525x645x920
53
NG DP 60 A
28.8
28.8
48
535x595x795
595x645x920
67
0.40
NG DP 60 W
30
28.8
58.8
48
535x595x795
595x645x920
67
0.40
NG DP 80 A
14.6
10.6
58
715x595x945
780x670x1055
78
0.57
NG DP 80 W
54
14.6
68.6
58
715x595x945
780x670x1055
78
0.57
NG DP 110 A
17.2
17.2
89
715x700x1050
780x780x1070
100
NG DP 110W
59
17.2
76.2
89
715x700x1050
780x780x1070
100
NG DP 150 A
22.4
22.4
95
860x700x1050
925x780x1070
105
NG DP 150W
62
22.4
84.4
95
860x700x1050
925x780x1070
105
NG MDP 150
A
22,4
22,4
70
775x625x805
820x700x825
80
NG MDP 150
W
62
22,4
84,4
70
775x625x805
820x700x825
80

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MODEL
HIGH PRESSURE
LOW
PRESSURE
TOTAL
INTENST.
AMPS
FUSE
SECURITY
(TO
INSTALL)
POWER
COMPRESSOR
POWER
ABS
MIN.
MAX.
AVERAGE
-2
(A)
(A)
-1
(W)
-2
(W)
2´5 bar
NDP 20
A
2
10
1/5
325
NDP 20
W
2
1/5
325
NG 30 A
2
1/4
402
NG 30
W
2
1/4
320
NG 35 A
3
1/4
440
NG 35
W
2
1/4
440
NG 45 A
4
3/8
580
NG 45
W
3
3/8
440
NG DP
60 A
15´5 bar
18 bar
3.7
3/8
590
NG DP
60 W
3.2
3/8
460
NG DP
80 A
3
.
6
1/2
800
NG DP
80 W
3
1/2
800
NG 110
A
5
7/8
950
NG 110
W
5
7/8
950
NG 150
A
6
1
3/8
1200
NG 150
W
6
1
3/8
1200
MDP
150 A
6
1
3/8
1200
MDP
150W
6
1 3/8
1200
(1) Data obtained at room temperature (20°C), water introduced at 15°C; water quality = 500ppm
(2) Maximum consumption obtained at room temperature=43°C, according to UNE climate classification Cla ss T
(TROPICALISED)
NOTE: Expansion controlled by capillary except in modulars models where it is controlled by means of
an expansion valve.

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2.1. ProductionTables
NDP 20
Tw/Ta
45
40
35
30
25
20
15
10
35
5
7
8
9
10
11
11
11
30
8
10
11
12
13
13
14
13
25
10
12
13
14
15
16
16
16
20
12
14
15
16
17
18
18
18
15
14
16
17
18
19
20
20
20
10
16
17
19
20
21
21
21
21
5
17
18
20
21
22
22
23
23
NG 30
Tw/Ta
45
40
35
30
25
20
15
10
35
8
10
12
14
15
16
17
17
30
11
14
16
18
19
20
21
21
25
15
18
20
22
23
24
24
24
20
18
21
23
25
26
27
27
27
15
21
23
26
27
29
30
30
30
10
23
26
28
30
31
32
32
32
5
25
28
30
32
33
34
34
34

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NG 35
Tw/Ta
45
40
35
30
25
20
15
10
35
9
12
14
16
18
19
20
20
30
13
16
19
21
23
24
24
24
25
18
21
23
25
27
28
28
28
20
21
24
27
29
30
31
32
32
15
24
27
30
32
34
35
35
35
10
27
30
33
35
36
37
38
38
5
29
32
35
37
39
40
40
40
NG 45
Tw/Ta
45
40
35
30
25
20
15
10
35
11
15
19
21
23
24
25
25
30
17
21
25
27
29
30
31
31
25
23
27
30
32
34
36
36
37
20
27
31
35
37
39
40
41
41
15
32
35
39
41
43
45
45
45
10
35
39
42
45
47
48
49
49
5
38
42
45
48
50
51
52
52

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NG 60
Tw/Ta
45
40
35
30
25
20
15
10
35
15
21
25
28
31
33
33
33
30
23
28
33
36
39
39
41
42
25
30
36
40
43
46
48
49
79
20
37
42
46
50
52
54
55
55
15
42
47
52
55
58
60
60
60
10
47
52
56
60
63
64
65
65
5
51
56
60
64
66
68
69
69
NG 80
Tw/Ta
45
40
35
30
25
20
15
10
35
21
28
33
38
41
44
45
45
30
31
38
44
49
52
54
55
55
25
41
48
53
58
62
64
65
65
20
49
56
62
67
70
72
73
73
15
56
63
69
74
77
80
81
81
10
63
70
75
80
83
86
87
87
5
68
75
81
85
89
91
92
92

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NG 110
Tw/Ta
45
40
35
30
25
20
15
10
35
28
38
46
52
57
60
62
62
30
43
53
61
67
72
75
76
76
25
56
66
74
80
85
88
89
89
20
68
77
85
92
96
99
101
101
15
78
87
95
102
106
110
111
111
10
86
96
104
110
115
118
120
119
5
93
103
111
117
122
125
127
126
NG 150
Tw/Ta
45
40
35
30
25
20
15
10
35
39
52
63
72
78
82
84
84
30
59
72
83
92
98
102
104
104
25
77
90
101
109
116
120
122
122
20
92
106
116
125
132
136
138
138
15
106
119
130
139
145
150
152
151
10
118
131
142
150
157
161
163
163
5
127
140
151
160
167
171
173
173

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3. DELIVERY AND UNPACKING
Upon receipt, thoroughly inspect the packing container. If there appears to be damage to the
container contact the shipper immediately. Unpack unit in the presence of delivery personnel
noting any damage on the waybill.
ITV packing bears the “Green Point” on all models according to the European Directives on
management of Packaging and Waste Disposal.
Be sure to include model name and serial number on all claims. Serial number is located in the
following three places:
(1) Packing
There is a label stuck onto the cardboard packing bearing this
serial number (1).
(2) Machine body
On the back of the machine (1).
(3) Rating plate and serial number
Located at the back of the machine.
Water cooled machines: check that the drainage hose at the back of the machine is in good
condition.
Verify that the installation kit is inside the bin, and has the following pieces: scoop, 3/4’ water
hose, two small filters and user manual.
In all models there is a large particle filter (5 micres) with accessories, and an ice dispersion
cone.
WARNING: DO NOT LEAVE PACKING
MATERIALS (PLASTIC BAGS, CARDBOARD BOXES, ETC.) WITHIN REACH OF
CHILDREN.

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TECHNICAL SERVICE MANUAL
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4. INSTALLATION
4.1. Recommended Placement of Unit
IMPORTANT!
The NG machines are intended to work at room temperature between 5ºC and 43ºC and with
water temperature between 5ºC and 35ºC.
Difficulties during harvest cycle can appear below these minimum temperatures. Above the
maximum temperatures the life of the compressor becomes shorter and the production
decreasesconsiderably.
IMPORTANT!
The new box-type frame in NG models allows a better ventilation in the air-cooled machines,
due to the fact that the condensers are placed in oblique position in the front part of the
machine.
The machines will work properly even if they are located in places with little ventilation at the
rear and lateral sides. The air is expelled by the front grill. Bear in mind theprevious remarks if
the premises where the machine is located is verydustyor smoky

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The floor on which the machine will be place should be solid and as leveled as possible.
4.2. Water and Drainage
Connecting Unit To Water Source
• Use 1.3 m. flexible tube (with the two filters attached) provided. NOTE: We advise using a
single faucet fixture.
• Water pressure should be between 0.7 and 6 Kgs/cm2. (10/85 Psi.)
• If water pressure exceeds these values, installation of appropriate corrective units will be
necessary.
• It is important that water tubing does not come close to or in contact with any heat sources or
heat generated by unit as this could decrease production.
Connecting Unit To Drain (Water -cooled Models)
• Drain must be located at least 150mm below machine level. Drain tube must have an inner
diameter of 30mm and a minimum gradient of 3 cm per metre.(3%).
4.3. Electricalconnection
- The Unit is provided with a 1.5 m cord and schucko socket. If the cord is damaged shoud be
replaced by a cord or special assembly supplied by the manufacturer or after-sales service.
- It is strongly recommended to leave a minimum space between the rear side and the wall in
order to have an easy access to the plug without risks.
- It is advisable to install a switch and adequate fuses. Nominal voltage and intensity are
indicated on rating plate as well as on this manual's technical pages. Voltage fluctuations
greater than 10% can cause problems or prevent machine from starting.
- The Line to base of plug must have a minimum section of 2.5 mm2.
- Be sure voltage indicated on rating plate corresponds to that of mains supply.
IMPORTANT!
Supply socket must be properly earthed. Be sure to check standard for country where appliance
is going to be installed.

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5. OPERATION
5.1. PreliminaryChecks
a) Is machine levelled?
b) Are voltage and frequency of mains supply the same as indicated on rating plate?
c) Is drainage system working properly?
d) Is air circulation and room temperature adequate? (Air-cooled models)
MAXIMUM
MINIMUM
AMBIENT
43º C (109.4ºF)
5º C (41ºF)
WATER
35ºC (95ºF)
5ºC (41ºF)
e) Is water pressure adequate?
MAXIMUM 0.7 bar
MINIMUM 6 bar
NOTE: To install a pressure reducer If water inlet pressure is more than 6 bar.
ATENTION: Check that voltage and mains frequency is the same as in the rating plate.
5.2. Starting up
Having followed the installation instructions (ventilation, temperature, room conditions, water
quality, etc…), proceed as follows:
1) Open water faucet. Check for leaks.
2) Plug machine into electricity mains supply.
3) Switch on the machine (the switch is in the front of the machine).
4) Ensure that there are no strange vibrations or scraping sounds.

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5) Check that the water curtain moves freely.
6) Verify that the nozzles send water to the evaporator in the correct direction (uniform fans).
7) After 10 minutes, check that the water bin has no leaks on the maximum level overflow.
IMPORTANT!
ADVISE THE FINAL USER ON MAINTENANCE PROCEDURES WHICH ARE NOT
INCLUDED IN WARRANTY, AS WELL AS THOSE BREAKDOWNS CAUSED BY NEGLECT
OFPROPER MAINTENANCE PROCEDURES.
6. ADJUSTMENTS
6.1. Condenser water pressure valve
- This pressure switch controls high pressure by opening and closing the condenser water
valve. Differential is a fixed 1 Bar (14 psi.).
- The valve closes at 15 Bar (214 psi), which is equivalent to a condensation water exit
temperature of 38ºC (100ºF). . Below this pressure it will be difficult to unstick the cubes
during the defrostingcycle.
- Above this pressure, compressor life and ice production are both reduced.
Pressure can be increased by turning the small screw on the pressure switch clockwise. A full
turn is equivalent to about 1.5 Bar.
6.2. Fan pressure switch (air–cooled models)
Pressure Control operates on high pressure by starting and stopping fan. Differential is a fixed
(1 Bar or 14 psi.).
Cut-off pressure must be 15 Bar (214 psi). Low pressure values may cause difficulties during
harvest cycle. Higher pressure values may shorten compressor life and diminish ice production.
Pressure can be regulated by rotating screw on Pressure Control Valve (clockwise to increase
pressure). One full turn is equivalent to about 1.5 Bar.

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Safety pressure switch
This safety device trips when discharge pressure is too
high. Pressure might exceed the limit when:
a) Air circulation is not sufficient, room temperature is
too high or condenser is dirty (air cooled models).
b) There is not enough water in the system or water
temperature too high in water cooled models.
HIGH PRESSURE REGULATION (fixed):
3030-22 Bar (from model 110 part # 2683)
27-21 Bar (380-296 psi.)