I-Tech Nano User manual

ITECH
di Moro Giampaolo
USER MANUAL
FOR AUTOMATIC A/C CHARGING STATIONS
Nano
Nano Hybrid

ITECH di Moro Giampaolo
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INDEX
1INTRODUCTION................................................................................2
1.1 Safety instructions .......................................................................2
2EQUIPMENT......................................................................................2
3USE...................................................................................................4
3.1 Control panel ................................................................................4
3.2 Preparation for first use ...............................................................6
3.3 Automatic use...............................................................................8
3.4 Manual use..................................................................................10
3.5 Synoptic diagram: automatic mode...........................................11
3.6 Synoptic diagram: manual mode...............................................12
3.7 Synoptic diagram: tank and filters modes.................................13
3.8 Pressures test.............................................................................14
3.9 New/exhausted oil ......................................................................15
4SERVICE.........................................................................................16
4.1 Dehydrator filter replacement ....................................................16
4.2 Vacuum pump oil replacement ..................................................17
5TECHNICAL SPECIFICATIONS......................................................18
6TROUBLESHOOTING.....................................................................19
7SPARE PARTS................................................................................21
8CONFORMITY DECLARATION.......................................................22

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1 INTRODUCTION
1.1 Safety instructions
This manual has been prepared to assist you during the use of A/C
charging station and in order to protect your safety.
Read carefully the safety regulations listed in this
manual. No responsibility is accepted in case of
wrong use of the device, and in that case any
warranty will be nullified.
Our A/C charging stations are destined to qualified personnel,
trained to follow all safety regulations, as well as the technical
instructions listed below:
use all stations in respect of national laws and regulations;
use protecting gloves and glasses;
do not inhale gas;
avoid contact with skin and/or eyes;
do not smoke nor use free flames during station use;
use in airy and dry environments only, not in humid ones;
use original spare parts only;
do not fill the gas tank more than 80% of its capacity;
turn off the station while connecting to the car A/C system;
use refrigerant fluid R134a only;
disconnect the station from power network during maintenance
operations, which must be executed exclusively by qualified and
trained personnel;
never position the station horizontally, to avoid oil leaks from
vacuum pump.

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2 EQUIPMENT
High pressure tube RED
Low pressure tube BLUE
Power cable 230V
Quick coupling R134a high pressure RED
Quick coupling R134a low pressure BLUE
The RED and BLUE quick couplings with safety closure have to be
opened by rotating as depicted in Figure 1:
Figure 1

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3 USE
3.1 Control panel
Figura 2 (elements position may vary depending on the station model)
1
2
9
10
12
5
4
6
7
8
3
11

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Control panel includes the following elements (Figure 2):
1 - High pressure gauge:
for A/C system check and diagnosis
2 - Low pressure gauge:
for A/C system and vacuum check and diagnosis
3 - Tank pressure gauge:
for gas tank pressure check
4 - High pressure valve:
opens/closes high pressure (red)
5 - Low pressure valve:
opens/closes low pressure (blue)
6 - High pressure coupling:
connects station to car A/C system via red tube
7 - Low pressure coupling:
connects station to car A/C system via blue tube
8 - Display:
shows station info and allowsto operate
9 - Button UP:
selection key
10 - Button DOWN:
selection key
11 - Button OK:
confirmation key
12 - Button ESC:
cancel key

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3.2 Preparation for first use
1. Ensure all valves are closed.
2. Make sure the car’s A/C system is of R134a kind.
3. Clean the car’s connectors.
4. Connect tubes to the car’s A/C system in this way:
RED high pressure, BLUE low pressure
5. Connect power cable to power network (220-240 V) and turn
on the station. The refrigerant fluid quantity contained in gas
tank will appear on display (for example: 3550 grams),
otherwise the display will indicate “LOW GAS” if gas quantity is
lesser than 2000 grams (Note: this is just a warning message,
but the charge can be executed anyway).
6. If the gas is not enough, refill the gas tank within 80% of its
capacity, in this way:
Press DOWN twice, commuting display to TANK mode.
Confirm by pressing OK.
Connect the external gas tank to the station using the
high pressure coupling (RED), orienting the tank as in
Figure 4 according to float presence or absence.

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Figure 3
The display shows the gas quantity to be charged
(default value: 2000 g). Adjust the desired quantity by
pressing UP/DOWN, keeping in mind that about further
500 grams of gas will be automatically added due to fluid
recovery from station internal circuit.
Confirm the value by pressing OK. The station will start
gas RECOVER from external tank, automatically
stopping once reached the set quantity, and will ask to
close the external tank valve (do it).
A de-icing pause is executed for about 3 minutes.
The station returns to AUTO mode. Gas tank refilling
operation is done.
7. Fill the new oil container (see paragraph 3.7). Remember
that in case of Nano Hybrid, it must be used specific oil for
hybrid cars A/C systems.
8. Open the quick couplings (see Figure 1).
9. Open the station RED and BLUE valves.
10. Preparation procedure is done.
WITHOUT FLOAT
WITH FLOAT

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3.3 Automatic use
The station works both in completely automatic mode (it does the
operations consecutively with minimum user intervention) and in
manual mode (user can execute the operations individually).
In automatic mode, in order to execute a charging cycle, once the
preparation procedure is terminated (paragraph 3.2), proceed in
this way:
1. The station shows AUTO mode and the quantity of available
refrigerant fluid. Press OK to begin automatic cycle.
2. The station shows the vacuum time (default: 30 minutes), which
can be accepted by pressing OK or adjusted by pressing
UP/DOWN arrows and then OK. Note: we recommend to
perform the default vacuum time.
3. Subsequently, the station shows the new oil quantity (default:
20 grams), which can be accepted by pressing OK or adjusted
by pressing UP/DOWN arrows and then OK. For new oil
quantities, refer to table in paragraph 3.7.
4. At this point, the station requests the quantity of refrigerant gas
to be introduced into the car’s A/C circuit (default: 300 grams).
The amount can be accepted by pressing OK or adjusted by
pressing UP/DOWN arrows and then OK; alternatively, it is
possible to access the internal DATABASE by pressing
DB/SET, choose the car manufacturer (UP/DOWN + OK) and
the car model (UP/DOWN + OK).

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5. The display shows >START<. Confirming by pressing OK, the
cycle begins automatically, executing in sequence:
RECOVER (with de-icing pause)
DISCHARGE OF EXHAUSTED OIL (it happens
automatically)
VACUUM (with leaking test “diagnosis”)
CHARGE OF NEW OIL (1…20)
CHARGE OF GAS (with sound alarm at end)
PRINT (choose NO because the station has not a printer)
6. Charge operation is over. At this point, it is appropriate to
execute manually the pressures test, following the instructions
at paragraph 3.6. This operation cannot be executed
automatically.
7. Once the pressures test is finished, turn off the station and
remove the quick couplings from the car.

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3.4 Manual use
Automatic-mode operations can be executed individually in manual
mode, except for the use of internal car database. To access
manual mode, once the station has been turned on, press DOWN to
commute from AUTO to MAN. The available refrigerant gas quantity
remains still shown on the display.
By pressing OK, it is possible to access the first phase of charging
cycle (RECOVER), which can be run by pressing OK again, or
bypassed by pressing DOWN and switching to the next phase.
Individually-executable phases are the same of automatic mode,
namely:
RECOVER (with de-icing pause)
VACUUM (with leaking test “diagnosis”)
CHARGE OF NEW OIL
CHARGE OF GAS (with sound alarm at end)
For VACUUM, CHARGE OF NEW OIL and CHARGE OF GAS
phases, before their beginning it is possible to adjust times and
quantities by pressing UP, DOWN and OK, in the same way as in
automatic mode (paragraph 3.3 points 2-3-4).
At the end of each phase, however, the station does NOT switch
automatically to the following step, but requires user intervention.

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3.5 Synoptic diagram: automatic mode

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3.6 Synoptic diagram: manual mode

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3.7 Synoptic diagram: tank and filters modes

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3.8 Pressures test
Once the charge operation is over, execute the pressures test by
using the table below, in this way:
1. Let the station connected to the car with closed valves.
2. Turn on the car and the car A/C system, setting it to the lowest
temperature possible.
3. Let the engine run for some minutes at about 2000 rpm.
4. Check the values on high/low pressure gauges, comparing
them with those reported in the table below.
Environment
temperature °C
LOW PRESSURE
HIGH PRESSURE
R134A
R134A
min
max
min
max
15,5
0,5
-
2,5
6,5
-
10
18
0,5
-
2,5
7
-
12
22
0,5
-
2,5
8
-
14
30
0,5
-
2,5
10
-
17
35
0,5
-
2,5
11,5
-
20
40
0,5
-
3
14
-
22

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3.9 New/exhausted oil
EXHAUSTED OIL
Empty the oil container when it reaches about 200/220 cc.
The exhausted oil must be disposed of in the appropriate sites.
Do not disperse into the environment.
NEW OIL
New oil level must never be less than 80/100 cc.
We advise to use specific oil recommended by car’s
manufacturer, or anyway Synthetic R134A oil. Important: for
Nano Hybrid station, oil must be specific for hybrid cars A/C
systems.
OIL RESTORATION
Gas quantity
(grams)
Suitable
oil quantity
Oil ISO
46
Notes
From 270
20
For more dense oils (type
ISO 100) increase by 5
From 500
25
From 750
30
From 1000
35
From 1250
10
WARNING: The quantities reported in the table are purely
indicative. Always make sure that the oil is compatible with the
one suggested by the car manufacturer.

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4 SERVICE
4.1 Dehydrator filter replacement
Recommended interval for filter replacement is 300 cycles. We
recommend to execute the maintenance at authorized centers.
Press DOWN three times in order to access FILTERS mode and
confirming by pressing OK to initiate RECOVER. Executing this
operation, there will not be gas leaks during filter replacement.
WARNING: Mount the filter as in Figure 5.
Figure 4
TO COMPRESSOR

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4.2 Vacuum pump oil replacement
Recommended interval for pump oil replacement is 300 cycles. We
recommend to execute the maintenance at authorized centers.
Periodically check the pump oil level.
Replace pump oil at recommended intervals, and in any case
after the first 100 working hours or in the case it darkens.
PROCEDURE
Empty the pump by the screw at the bottom. (2)
Open the tap at the top and introduce new oil. (1)
Check the oil level (it must be about at half of the glass) (3)
WARNING: The exhausted oil must be disposed of in
the appropriate sites, following the environmental
laws and regulations in force in your nation/region.
Figure 5

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5 TECHNICAL SPECIFICATIONS
COMPRESSOR
9 cc
VACUUM PUMP
80 l/min 0,1 Mbar
GAS TANK
11 liters(N.C., N.C.+, N.C.
7, CLEVER, 5)
6 liters(BABY)
FILTERS
High-efficiency filters
WORKING TEMPERATURE
From 10°C to 50°C
VOLTAGE
220/230 V 50 Hz
RECOVERY SPEED
500 g/min
DIMENSIONS
410x450x1020 mm
(N.C., N.C.+, N.C. 7)
410x650x900 mm
(CLEVER)
430x410x1100 mm (5)
400x400x700 mm
(BABY)
WEIGHT
60 kg (N.C., N.C.+, N.C. 7,
CLEVER, 5)
45 kg (BABY)
REFRIGERANT FLUID TYPE
R134a

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6 TROUBLESHOOTING
PROBLEM
SOLUTIONS
General problems
The station doesn’t work, the switch is not
illuminated.
5
Turning on the station, the display is not
illuminated.
1-2-3
The station works, but does not accept any
input from the control panel.
1-2-3
Weighing problems
Turning on the station, the gas weight is not
indicated, although the fluid is present.
9-10
During the recovery phase, the station does
not indicate the weight of recovered gas.
8-9-10-16-20
Working problems
At the beginning of the cycle, the station
bypasses recovery phase and switches directly
to vacuum phase.
1-14-15-20
The recovery phase begins, but no gas is
recovered.
1-8-14-15-16-20
Vacuum phase does not create vacuum.
1-13-21
Gas charging is not completed.
23-25-26