CARBOTEK Nitro ND-20-01-01 User manual

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Doc Version: 1.3 / Date: 29.04.2021
Nitro Dispenser
Operation Manual
Model: ND-20-01-01 / ND-20-02-01
Carbotek Systems GmbH, Germany
Doc Version: 1.3 / Date: 29.04.2021

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Table of Contents
1. Safety Instructions..................................................................................................................................... 3
1.1. Setup / Commissioning...................................................................................................................... 3
1.2. Operations......................................................................................................................................... 3
1.3. Spare Parts......................................................................................................................................... 4
1.4. Transport and Storage....................................................................................................................... 4
1.5. Electrical Connections ....................................................................................................................... 4
1.6. Service ............................................................................................................................................... 4
1.7. Intended Usage.................................................................................................................................. 4
2. Before Starting........................................................................................................................................... 5
2.1 Dispenser Functionality..................................................................................................................... 5
2.2 Dimension.......................................................................................................................................... 5
2.3 Technical Data and Properties........................................................................................................... 6
2.4 Filtration ............................................................................................................................................ 8
3. Commissioning .......................................................................................................................................... 9
3.1. Scope of Supply ................................................................................................................................. 9
3.2. Setup and Start................................................................................................................................ 10
3.3. Adjustments..................................................................................................................................... 13
4. Decommissioning .................................................................................................................................... 15
5. Hygiene, Cleaning, Maintenance............................................................................................................. 16
5.1. Product shelf life after connection.................................................................................................. 16
5.2. Break times...................................................................................................................................... 17
5.3. Chemical cleaning............................................................................................................................ 18
5.4. Preventive Maintenance ................................................................................................................. 22
6. Dispenser extension ................................................................................................................................ 23
6.1. Tap extension .................................................................................................................................. 23
6.2. Mix-Box module............................................................................................................................... 23
7. Packaging and Shipping........................................................................................................................... 24
8. Troubleshooting ...................................................................................................................................... 25
9. Disposal.................................................................................................................................................... 27
10. Warranty.............................................................................................................................................. 27
11. CE Declaration of Conformity.............................................................................................................. 27
12. Contact Data........................................................................................................................................ 27
13. Cleaning Protocol................................................................................................................................. 28

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1. Safety Instructions
1.1. Setup / Commissioning
The use and maintenance of the machine shall be limited to trained personnel only.
Place the unit upright standing in a horizontal, level, dry, and clean place. Ensure that the power connection
cable is routed directly to the socket. Do not locate multiple portable socket-outlets or portable power
supplies at the rear of the appliance. The connecting cable must never be kinked or squeezed and the
lateral openings require a free distance of 5 cm to provide the required air circulation. The free distance
behind and above the dispenser must be as well 5 cm. The dispenser front, with the tap outlet must stay
open and uncovered.
As an operator pay attention to the listed safety measures:
•Operate dispenser within a temperature range of +6 to +35°C
•Prevent dirt (dust, fibers, etc.) from entering the unit
•Connect only the specified supply voltage.
•The wall socket used must be connected to an overcurrent protection device (16A).
•The device may only be operated with a properly wired protective earth conductor.
•Protect the device against moisture
•Do not insert objects into rotating parts (fan or compressor)
•Observe the warning, safety and service instructions in this manual
1.2. Operations
The device described here may only be operated by suitably trained persons. Children shall not play with
the machine. This machine can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision and instruction concerning use of the machine in a safe way and if they understand the hazards
involved. Cleaning and user maintenance shall not be made by children.
Do not use a water jet for cleaning purposes.
Keep ventilation openings, in the appliance enclosure, clear of obstruction. The air circulation must be
possible at any time.
Do not damage the refrigerant circuit. The R290 refrigerant is an extremely flammable gas.
Serious personal injury and material damage can be caused by:
•Improper use
•Incorrect installation or operation
•Unauthorized removal of the necessary protective covers or housings
•Invalid opening of the device during operation
•Failure to comply with the applicable legislation / standards for beverage dispense installations.
•Service and repair jobs where access to the machine inside is required, may only be carried out by a
trained or instructed technician
If, for any reason, it can be assumed that the safety is impaired or when it is changed from normal
operation, the appliance must be put out of service and marked so that it is not inadvertently put back into
service by a third party. In addition, the customer service has to be notified. Safety may be impaired if the
appliance is not working properly or is visibly damaged.

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1.3. Spare Parts
If modules or parts are replaced, only identical & original assemblies or parts may be used.
1.4. Transport and Storage
Damages determined after delivery must be communicated immediately to the carrier. Commissioning may
be excluded. The device must only be stored in a dry environment at temperatures of 0 to 60°C.
1.5. Electrical Connections
All work must be carried out only if:
•The electrical system is switched off and protected against unintentional reconnection
•Verified that no current is present.
•It is ensured that additional monitoring and protection devices, which are provided for the operation of
this control, are installed in a professional manner.
When connecting, ensure that applicable local standards and regulations are observed.
1.6. Service
For service and repair jobs please refer to the technical service manual.
1.7. Intended Usage
The Carbotek Nitro Dispenser is a ready-to-use dispenser to tap nitrogenated and cooled beverages in
particular cold-brew coffee. This machine is intended for indoor use only. Such as: Small shops,
convenience stores and kiosks, bars and restaurants, staff kitchen areas in shops, offices and other working
environments, hotels and motels. It may be used in private households as well.
The device is only approved for this application and is not suitable for cooling hot liquids, unfiltered liquids,
chemicals or similar.

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2. Before Starting
2.1 Dispenser Functionality
The Carbotek Nitro Dispenser combines different functions in one device.
•Suction of filtered liquids (e.g. cold-brew coffee) from an unpressurized or pressurized container,
possibly from a bag-in-box.
•Cooling the liquid in the dispenser cooling block
•Injection of filtered compressed air into the liquid. The atmospheric nitrogen (78%) in the air creates
the cascading nitro effect. A built-in compressor is used. There is no nitrogen generator embedded.
•The liquid and the gas are blended in the jet-nozzle spout of the tap.
•Dispense of nitrogenated beverages in the typical Guinness Style.
•With a toggle switch the operator can switch between nitrogenated and non-nitrogenated drinks.
•Outlet temperature control.
2.2 Dimension
The outside dimensions between 1-tap and 2-tap
versions are identical.
Depth
A : body depth 40.5 cm
B : drip tray 14.5 cm
C : tap 10.5 cm
A + B : total depth 55.0 cm
Height
D : body height 37.5 cm
E : handle height 4.5 cm
F1 : drip tray 1.5 cm
F2 : max glass height 20.5 cm
F3 : above tap 5.0 cm
F4 : tap with handle 20.5 cm
D –F3 + F4 total height 53.0 cm
Width
G : width 17.5 cm

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2.3 Technical Data and Properties
Taps
1 Tap
2 Tap
Model
ND-20-01-01
ND-20-02-01
Picture
Beverages
Cold-Brew-Coffee, Tea, Coffee-Cocktails
Electrical & refrigerant
Power supply
220 –240 V~ / 50 Hz
Wattage / amperage
408 W / 1,7 A
Refrigerant / amount
R290, 47g
Propane is an extremely flammable gas
Refrigerant / amount
R290, 47g
Electrical connection
C14 socket
Power cable
not included in standard scope of delivery
Cooler type
dry
Climatic class
N
Accessories
5l cleaning or product canister with ball-
lock pin
1 x
2 x
Drip tray
1 x
Intake hose with strainer and ball-lock
coupler
1 x
2 x
Inlet strainer for particles > 0.1 mm
1 x
2 x
Detergent
2 packs of Thonhauser DESANA MAX CL detergent
Features
Nitrogen source
Filtered compressed air (78% nitrogen)
Jet nozzle with 2-hole disc
(flowrate 0.6 l/min)
1 x
2 x
Nitro toggle switch to switch between
Nitro and non-Nitro
1 x (each tap)
2 x (each tap)
Gas amount control
No –default factory setup
Particle air-filter
Yes

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Nitro-Port
to connect nitrogen bottles
No
Temperature setup
5.0 –6.0°C (at level 7 on front scale)
can be adjusted to lower temperatures for alcoholic drinks.
For Espresso Martini eg -1°C at level 7 on front scale.
Liquid volume inside dispenser
1 x 370 ml
2 x 300 ml
Cooling effect during nonstop dispense
Δ7,5°C (at 0.6 l/min)
Δ7,0°C (at 0.6 l/min)
Continuous (non-stop) dispense is only possible until an ambient temperature of 30°C.
Between 30 and 35°C non-stop dispensing is possible up to 30 min. Then the dispenser needs a recovery
break of 15 min to cool down again.
Device connections
Product inlet
1 x Linktech coupler
3/8” hose
2 x Linktech coupler
3/8” hose
Available options
Jet nozzle with 5-hole disc
(flowrate 1.2 l/min)
available
available
Tap extension
to place dispenser undercounter
and dispense via dispensing tower.
available
available
Vitop couplers for intake line
available
available
Mix-Box add on module for a
concentrate supply chain
available
end of 2020
not yet available
Customizable foil
available
available
Espresso Martini gas nozzle
for extra fine crema
available
available
Others
Noise emission level
<= 64 dB
Customs code
84388091
Warranty
2 years
Weight & dimensions
Net / gross weight
20.9 kg / 23.3 kg
23.5 kg / 25.9 kg
Dispenser dimensions (H x W x D)
including tap handle
53.0 x 19.5 x 55.0 cm
Packaging dimensions (H x W x D)
50.0 x 38.0 x 59.5 cm

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2.4 Filtration
Ensure that the coffee was filtered with a fineness of at least 100 µm (100 micron).
Coarser filtration sizes lead to clogging of the filter in the intake line or in the jet-
nozzle outlet-spout of the tap. Make sure the filter adapter is installed in the coffee
intake line. The filter adapter provides a particle size filter of 100 µm.
Attention!
By not using an appropriate intake filter the internal dispenser pump might be damaged or destroyed
through coffee particles.

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3. Commissioning
3.1. Scope of Supply
The Nitro Dispenser is delivered with the components as listed below. The model specific differences are
listed in the table.
1-tap Nitro Dispenser
2-tap Nitro Dispenser
1) 1x Nitro Dispenser
2) 1x Accessories box
3) 1x 5l coffee canister
valved with intake hose
1) 1x Nitro Dispenser
2) 1x Accessories box
3) 2x 5l coffee canister
valved with intake hoses
Accessories box parts
2.1) 1x Drip tray
2.2) 1x Tap valve body
2.3) 1x Tap handle
2.4) 2x Detergent sample
packs
2.5) 1x CMB cleaning
adapters
2.6) 1x tap key
1x filter key
Accessories box parts
2.1) 1x Drip tray
2.2) 2x Tap valve body
2.3) 2x Tap handle
2.4) 2x Detergent sample
packs
2.5) 2x CMB cleaning
adapters
2.6) 1x tap key
1x filter key
Please note: The country specific power cable is not included in the standard scope of supply.
1
2
3
2.1
2.2
2.3
2.4
2.5
2.6

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3.2. Setup and Start
The setup and starting procedure between one and two tap versions in principle is identical except the
number of taps, intake hoses and canisters differ between the models.
1. Remove foil from drip tray
2. Connect intake hose(s) to dispenser
3. Prepare tap(s)
A
B
C
D
Remove foil from drip tray
Push in the adapter until you
hear a “click” sound.

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4. Connect to electrical socket
5. Set temperature to 7 (max cold)
6. Fill canister(s) halfway with clean water
A
B
Connect Dispenser
with C13 power cord.
A
B
Fill the canister
halfway with
clean water.
C
D
Push coupler on
the adapter until
you hear it “click”.

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7. Push “PRESSURE” button
8. Flip toggle switch on “NITRO ON”
9. Flush dispenser with water
10. Prepare and connect your coffee
10. Ready to serve your Nitro-coffee
Coffee in the canister
or coffee in Bag-In-Box

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3.3. Adjustments
Things that can be adjusted from the operator are:
1. Nitro On/Off Toggle-Switch
2. Target dispense temperature
1. Nitro On/Off Toggle-Switch
Nitro ON : Switch UP
Nitro OFF : Switch DOWN
When changing from NITRO-ON to NITRO–OFF it takes about 50 ml of coffee until the remaining nitro gas is
out. Open & close the tap handle a couple of times (3-4) and dispense the 50 ml in small batches, like this
the gas in the tap is flushed out faster.
NITRO ON
NITRO OFF

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2. Temperature
The target dispense temperature can be adjusted at the
thermostat knob at the front within a range of 12°C.
Turning it clockwise = make it colder (max position is 7)
Turning it counter clockwise = make it warmer or switch cooling
off at a position of 0.
Coldest temperature is: 5°C (+/- 1°C)
Warmest temperature is: 17°C
Dispensers used for coffee-spirit blends can be set colder at customer's request. The temperature level is
lowered by 6°C. The temperature of stage 7 is then: -1°C and the temperature of stage 1: 11°C. When
tapping non-alcoholic beverages during cleaning and rinsing, the unit must be set to level 4 or lower (3,2,1)
- otherwise the beverage may freeze. Level 4 corresponds to approx. 5°C.
The dispenser has an internal liquid buffer that is kept cold according to the thermostat settings. In a non-
stop dispense situation the cooling effect is a reduction of Δ7,0°C from the intake temperature of the
coffee. (at a flowrate of 0.6 l/min)

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4. Decommissioning
1. Before putting the dispenser out of service we recommend a chemical cleaning if you want to keep it
out of service for a longer time.
2. Flush the dispenser and canister with clean water.
3. Let the dispenser suck in air and through this empty the internal liquid buffer of about 400ml.
Do NOT disconnect the intake line from the dispenser in order to suck air. The Linktech coupler system
has a check valve that prevents air sucking and by this the internal liquid buffer cannot be emptied.
4. Disconnect the intake line and remove power plug from electrical socket.
5. Pull handle to open tap and release internal pressure
6. Unscrew the nozzle from the Dispenser and put it in the accessory box to make sure the nozzle is not
connected to the dispenser and can dry out easily during non-usage period.
Protect the dispenser against rain and dust and store it in a temperatures range between 0 °C and 60°C.

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5. Hygiene, Cleaning, Maintenance
5.1. Product shelf life after connection
The product shelf life after connection depends on a couple of circumstances that are independent from
the dispenser. Such as:
•Shelf life of product before connection
•Connection spout system (hygienic concept / design)
•Ambient or cooled environment before and after connection
•Tapping frequency
•Cleaning frequency and detergent used at cleaning procedure
Coffee from Bag-In-Box
In our experience a shelf life of 1 week (after
connection) with a flash-pasteurized, aseptically
packed cold-brew coffee in bag-in-box with an
appropriate valve system, at ambient storage can be
achieved with a minimum tapping frequency of 1.0 l
every day. In such a scenario, we recommend a
weekly chemical cleaning without any intermediate
rinsing.
Coffee from a container
If the coffee is prepared on site and placed in a vessel
with air contact, standing at ambient temperature –it
should not be connected and used for more than two
days. In this scenario we recommend to flush the
system with water every second day and provide a
weekly chemical cleaning.
The shelf life can be extended by 1 or 2 days, if the
container (canister) is placed in a small fridge as
shown on the picture.
The product shelf life and the product quality are in the responsibility of the operator. Carbotek can just
provide general recommendation at this stage.
Coffee in
Bag-In-Box
Coffee in a
container
Container in a
mini fridge
Mini fridge
closed

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5.2. Break times
Consider the points below only as a general guideline to provide enduring high coffee quality to your
guests. There might be coffee / product specific differences in your application.
•Keep the cooling on “max cold” during dispense break times
•If the dispense break is longer than 2 days, disconnect your coffee and flush the dispenser with fresh
water before restart of coffee dispense
•Don’t wait longer than 3 days to remove remaining product from the dispenser and flush with water.
Otherwise micros and mold will grow in the system and might clog parts of it.
•If the break time is more than 4 days follow the “Decommissioning” steps in chapter 4.
•After a break time always check the coffee quality with a small sip, before restart of operations.

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5.3. Chemical cleaning
The dispenser should be cleaned chemically every 7 days. We recommend the cleaning powder: "DESANA
MAX CL" by the company Thonhauser because it is simple to handle and removes potential biofilm reliable.
The color indicator provides information about the cleaning result to the operator.
Track the cleaning activities in a cleaning protocol - in case that a cleaning proof is requested from a food
inspection. If the machine in normal operation is used for coffee spirits and is set to subzero, the
temperature during cleaning should be set to level 4 (or less) - otherwise the liquid may freeze.
Please wear gloves and safety glasses when working with detergents.
1. Rinse with water
2. Switch air compressor off and release system pressure
Fill canister(s) halfway
with water (=2.5l) and
shake it.
A
B
C
A
B
Connect water
canister(s) to the
Dispenser.
Open tap(s) until
water comes out
Switch off PRESSURE
Open tap(s) and
release pressure

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3. Check intake filter, jet-nozzle and tap valve and rinse tap valve with water
Open filter adapter(s) with key
Take out filter and flush
with water if required
Unscrew jet nozzle(s) upper part
Check blue screen and flush with water
Unscrew bottom part of jet nozzle(s)
Check disc holes
for particles and
flush if required.
Check valve(s) and
flush with water.
Then put it back in
its position.
A
B
C
D
E
F
G
H
I
J
Close filter again with key
Put back the
nozzle(s) bottom
and upper part
Unscrew the tap
valve(s)

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4. Prepare cleaning solution with 4.5 l warm water + 1 x DESANA MAX CL powder
Flush the solution through the dispenser.
WAIT 10 MINUTES
A
B
C
D
E
F
Prepare cleaning 2x
solution with 4.5 l
hand warm water.
Shake canister(s)
Connect canister(s) to Dispenser
Flush Dispenser with
cleaning solution until
canister is half empty.
Now flush the rest