ITV ICE MAKERS NDP 20 A, NDP 20 W, NG 30 W, NG 30 A, NG 35 A Technical & Service Manual
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NG DP
TECHNICAL SERVICE MANUAL
1
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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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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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.
Operating principle
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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-
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 MICROSWITCHES DEPRESSED).
-
The ITV model NG has two switches:
1
st
In the frontal side of the machine (with led). This turns the machine on or off when we press
it.
2
nd
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
NDP20 model).
-
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 13 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
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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.
NG DP
TECHNICAL SERVICE MANUAL
1.4.
Wiring diagrams
7
NG DP
TECHNICAL SERVICE MANUAL
2. SPECIFICATIONS
NDP 20
NG DP 30 - 150
8
NG DP
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 20 W
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 110 W
59
17.2
76.2
89
715x700x1050
780x780x1070
100
NG DP 150 A
22.4
22.4
95
860x700x1050
925x780x1070
105
NG DP 150 W
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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