Manitowoc Multiplex N2Fusion Service Manual

™

N₂Fusion

Nitrogen Beverage Dispenser

Service Manual

This manual is updated as new information and models are released. Visit our website for the latest manual.
www.manitowocfsg.com

Part Number 020007115 06/27/2019

Safety Notices

As you work on Manitowoc equipment, be sure to pay close
attention to the safety notices in this manual. Disregarding
the notices may lead to serious injury and/or damage to the
equipment.

Throughout this manual, you will see the following types of
safety notices:

Warning

n

Text in a Warning box alerts you to a potential personal
injury situation. Be sure to read the Warning statement
before proceeding, and work carefully.

Caution

,

Text in a Caution box alerts you to a situation in which
you could damage the equipment. Be sure to read
the Caution statement before proceeding, and work
carefully.

Procedural Notices

As you work on Manitowoc equipment, be sure to read the
procedural notices in this manual. These notices supply
helpful information which may assist you as you work.

Throughout this manual, you will see the following types of
procedural notices:

Important

Text in an Important box provides you with information
that may help you perform a procedure more efficiently.
Disregarding this information will not cause damage or
injury, but it may slow you down as you work.

NOTE: Text set off as a Note provides you with simple, but
useful, extra information about the procedure you are
performing.

Read These Before Proceeding

Caution

,

Proper installation, care and maintenance are
essential for maximum performance and trouble-free
operation of your equipment. Visit our website www.
manitowocfsg.com for manual updates, translations, or
contact information for service agents in your area.

Important

Routine adjustments and maintenance procedures
outlined in this manual are not covered by the warranty.

Warning

n

Read this manual thoroughly before operating, installing
or performing maintenance on the equipment. Failure
to follow instructions in this manual can cause property
damage, injury or death.

Warning

n

Do not use electrical appliances or accessories other
than those supplied by Manitowoc for your ice machine
model.

Warning

n

Two or more people or a lifting device are required to lift
this appliance.

Warning

n

This equipment contains high voltage electricity and
refrigerant charge. Installation and repairs are to be
performed by properly trained technicians aware of
the dangers of dealing with high voltage electricity and
refrigerant under pressure. The technician must also be
certified in proper refrigerant handling and servicing
procedures. All lockout and tag out procedures must be
followed when working on this equipment.

Warning

n

Do not damage the refrigeration circuit when installing,
maintaining or servicing the unit.

Warning

n

Do not operate equipment that has been misused,
abused, neglected, damaged, or altered/modified
from that of original manufactured specifications. This
appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision concerning use of the
appliance by a person responsible for their safety. Do
not allow children to play with this appliance.

Warning

n

All covers and access panels must be in place and
properly secured, before operating this equipment.

Warning

n

Do not obstruct machine vents or openings.

Warning

n

Do not store gasoline or other flammable vapors or
liquids in the vicinity of this or any other appliance.

Warning

n

Do not clean with water jet.

Warning

n

It is the responsibility of the equipment owner to
perform a Personal Protective Equipment Hazard
Assessment to ensure adequate protection during
maintenance procedures.

Warning

n

When using electric appliances, basic precautions must
always be followed, including the following:

a. Read all the instructions before using the

appliance.

b. To reduce the risk of injury, close supervision

is necessary when an appliance is used near

children.
c. Do not contact moving parts.
d. Only use attachments recommended or sold by

the manufacturer.
e. Do not use outdoors.
f. For a cord-connected appliance, the following

must be included:

• Do not unplug by pulling on cord. To unplug,
grasp the plug, not the cord.

• Unplug from outlet when not in use and
before servicing or cleaning.

• Do not operate any appliance with a
damaged cord or plug, or after the appliance
malfunctions or is dropped or damaged in
any manner. Contact the nearest authorized
service facility for examination, repair, or
electrical or mechanical adjustment.

g. Follow applicable lock out tag out procedures

before working on equipment.

h. Connect to a properly grounded outlet only.

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Section 1
General Information

Section 2
Installation

Section 3
Operation

Table of Contents

Model Numbers .................................................................................................................. 9

Model Nomenclature: ..........................................................................................................................9

About N₂Fusion™ ................................................................................................................ 9

Serial Number Location ..................................................................................................... 9

Specifications ...................................................................................................................10

Dimensions ............................................................................................................................................ 10

Capacity & Weight ............................................................................................................................... 10

Product Delivery Location ................................................................................................................11

Refrigerant Charge .............................................................................................................................. 11

Electrical ................................................................................................................................................. 12

System Pressures ................................................................................................................................. 13

Step-by-Step Installation .................................................................................................15

Pre-installation Checklist .................................................................................................................. 15

Remote Tower Installation ............................................................................................................... 16

Nitrogen Regulator & Tank Assembly .......................................................................................... 17

Nitrogen Installation/Replacement .............................................................................................. 18

Nitrogen Connections & Pressures ...............................................................................................18

N2 Quick Disconnect & Drain ........................................................................................................... 19

Keg & Pump Regulators .................................................................................................................... 19

Keg Connections ................................................................................................................................. 21

Door Hinge Reversal........................................................................................................................... 22

Product Dispense Operation ........................................................................................... 23

Prerequisites: ......................................................................................................................................... 23

Operation .............................................................................................................................................. 23

Taps & Nozzles ...................................................................................................................................... 23

Flow Control & Locking Collar ........................................................................................................24

Kegs .......................................................................................................................................................... 24

Keg Change ........................................................................................................................................... 24

Priming the System ............................................................................................................................25

Nitrogenator ......................................................................................................................................... 25

Refrigerated Cabinet Operation .....................................................................................26

In-Line Strainer ..................................................................................................................................... 26

Part Number 020007115 06/27/2019 5

Section 4
Maintenance

Section 5
Troubleshooting

Section 6
Controls

Table of Contents (continued)

General Maintenance .......................................................................................................27

Door Gasket Maintenance ............................................................................................................... 28

Drain Maintenance - Inside Lower Cabinet ................................................................................28

Refrigerators .......................................................................................................................................... 28

Stainless Steel Care & Cleaning ...................................................................................................... 28

Doors/Hinges ........................................................................................................................................ 29

Preventing Corrosion ......................................................................................................................... 29

Other Monthly Tasks ........................................................................................................................... 29

General Cleaning ................................................................................................................................. 29

Cleaning Supplies ............................................................................................................................... 30

Daily & Weekly Cleaning ................................................................................................................... 31

Extended Shutdown Procedure ......................................................................................32

Other Operations .............................................................................................................33

Doors/Hinges ........................................................................................................................................ 33

Dispensing Issues ............................................................................................................................... 35

Dispensing Flowchart ....................................................................................................................... 36

Pouring ....................................................................................................................................................37

Coffee Dispense System....................................................................................................................37

Pump Flowchart..................................................................................................................................38

No Power Flowchart ........................................................................................................................... 39

Refrigerator Cabinet Issues .............................................................................................................. 39

Refrigerated Cabinet Flowchart ..................................................................................................... 40

Cabinet Temperature Out of Range .............................................................................................. 41

High Product Temperature ..............................................................................................................41

Refrigeration System Diagnostics ..................................................................................42

Refrigeration System Checklists ..................................................................................................... 42

Discharge Pressure High Checklist ................................................................................................42

Discharge Pressure Low Checklist ................................................................................................. 42

Suction Pressure High Checklist .................................................................................................... 42

Suction Pressure Low Checklist ......................................................................................................42

Prime/Clean Button ..........................................................................................................43

Priming Mode ....................................................................................................................................... 43

Cleaning Mode ..................................................................................................................................... 44

Error Code .............................................................................................................................................. 44

Refrigerated Cabinet ........................................................................................................44

Controls/Programming/Settings ................................................................................................... 44

6 Part Number 020007115 06/27/2019

Section 7
Component Check Procedures

Component Identification ...............................................................................................45

External ................................................................................................................................................... 45

Power Supply ........................................................................................................................................ 46

High Pressure Cutout (HPCO) Control.......................................................................................... 46

Compressor Electrical Diagnostics ................................................................................................ 47

Diagnosing Start Components ....................................................................................................... 47

Compressor Electrical Diagnostics ................................................................................................ 48

Compressor Drawing Locked Rotor .............................................................................................. 48

Diagnosing Capacitors ...................................................................................................................... 48

Filter-Driers ............................................................................................................................................ 49

System Contamination Clean-Up .................................................................................... 50

General .................................................................................................................................................... 50

Determining Severity Of Contamination .................................................................................... 50

Cleanup Procedure ............................................................................................................................. 51

Replacing Pressure Controls ........................................................................................................... 52

Section 8
Charts

Total System Refrigerant Charge ....................................................................................53

Section 9
Diagrams

Table of Contents (continued)

Wiring Diagram .................................................................................................................................... 55

Plumbing Diagram ..............................................................................................................................56

Programmable logic controller (PLC) State Diagrams ...........................................................57

Part Number 020007115 06/27/2019 7

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Section 1

General Information

Model Numbers

This manual covers the following models:

MODEL NOMENCLATURE:

ND 2 1 T S 0 0

I II III IV V VI VII VIII

Dispenser Type

ND = Nitro Dispenser

NC = Nitro Coffee

Number of

Taps

2 = Two
(one still,
one gas)

3 = Four
(one still,
three gas)

4 = Four
(two still,
two gas)

Towers

1 = Single

2 = Dual

3 = Dual Fonts *

4 = Four Fonts *

* Each Font Mounts 1 Tap

Tower

Mounting

T = Top Mount
on Base

R = Remote
Counter Top

About N₂Fusion™

The N₂Fusion™ Nitrogen Beverage Dispenser is a self­contained dispensing unit that allows the operator to
dispense chilled and/or nitrogenized drink combinations of
coffee. It holds product containers or kegs in a refrigerated
reach-in base enclosure.

The operator controls the product pour on the unit using
mechanical beer style taps. Drink size options are manually
controlled. Purging and cleaning are controlled through
and internal push button located in the upper left corner
of the refrigeration cabinet. A blue LED ring will illuminate
around the button to provide feedback to the user during
purge, cleaning, and/or errors.

Periodic software updates through the PLC on the rear
of the unit may be required for maintenance, additional
features, and/or improvements.

NOTE: These units are intended for indoor use.

Handle & Nozzle Cabinet Type Electrical & Refrigerant

B = Black Plastic

S = Stainless Polished

C = Coffee Wood
Handle & Polished
Stainless Nozzle

0 = 406 Star

1 = BIM Base

2 = Global Under
Counter

3 = Slimwide
Cabinet
(SBX Gen 2)

0 = 115/60 - R404a
1 = 220/60 - R404a
2 = 230-240/50 R404a
3 = 100/60 - R404a
4 = 100/50 - R404a
5 = 115/60 - R290
6 = 220/60 - R290
7 = 230-240/50 R404a
8 = 100/60 - R290
9 = 100/50 - R290

Serial Number Location

The serial number on N2Fusion™ Nitrogen Beverage
Dispenser is printed on the left side of the interior wall.

Always have the serial number of your unit available
when calling for parts or service.

Customer

Specific

A = Double
System

Sample Serial Tag

Part Number 020007115 06/27/2019 9

General Information Section 1

Specifications

DIMENSIONS

A

B

Model A B C D E F G H I

ND21TS00
ND21TS01
ND21TS02
ND21TS03
ND21TS04
ND21RS00 30.75”
ND21RS02

27.3”

(69cm)

34.0”

(86cm)

(78cm) *

D

E

28.4”

(72cm)

F

20.7”

(53cm)

13.6”

(35cm)

C

16.1”

(41cm)

G

H

44.6”

(113cm)

10.6”

(27cm)

I

7.3”

(19cm)

* This dimension represents units using 1.25” (3.175cm) low profile casters, regular casters are 1.25” (3.175cm) taller.

Warning

n

To avoid instability the installation area must be
capable of supporting the weight of the equipment.
Additionally the equipment must be level side to side
and front to back.

CAPACITY & WEIGHT

Model Max Capacity Volume Weight

ND21TS00
ND21TS01
ND21TS02
ND21TS03
ND21TS04
ND21RS00
ND21RS02

3 - 3 Gallon (11.36L) Coffee Kegs 5.7Ft3 (161L) 168lbs (76kg)

10 Part Number 020007115 06/27/2019

Section 1 General Information

PRODUCT DELIVERY LOCATION

Warning

n

This equipment must be positioned so that the plug is
accessible unless other means for disconnection from
the power supply (e.g., circuit breaker or disconnect
switch) is provided.

Warning

n

Adequate means must be provided to limit the
movement of this appliance without depending on or
transmitting stress to the electrical conduit or gas lines.

Warning

n

To avoid instability the installation area must be capable
of supporting the combined weight of the equipment
and product. Additionally the equipment must be level
side to side and front to back.

Warning

n

This equipment is intended for indoor use only. Do not
install or operate this equipment in outdoor areas.

Clearances

DANGER

Minimum clearance requirements are the same for
noncombustible locations as for combustible locations.
The flooring under the appliance must be made of a
noncombustible material.

DANGER

Risk of fire/shock. All minimum clearances must be
maintained. Do not obstruct vents or openings..

Sides 0" (0 cm)

Back 3” (76mm)

Front 30" (76 cm)

Warning

n

Do not obstruct machine vents or openings this includes
installing in an enclosed cabinet where the unit will not
have access to ambient air.

Warning

n

Do not position the air intake vent near steam or heat
exhaust of another appliance.

The location selected for the equipment must meet the
following criteria. If any of these criteria are not met, select
another location.

• Units are intended for indoor use only.

• The location MUST be level both front to back and side to
side, stable and capable of supporting the weight of the
equipment.

• Position the equipment so it will not tip or slide.

• Recommended air temperature is 41° - 86°F (5° - 30°C), and
must not exceed 90°F (32°C), climate class 4.

• Location must have proper ventilation, DO NOT install in an
enclosure/enclosed cabinet with no access to ambient air.

• The location must not be near heat-generating equipment
or in direct sunlight and must be protected from weather.

• Verify floor of install location is within 1/2” (1.3 cm) of level
front to back, side to side.

• Keep equipment area clear of combustible material.

• Do not install the equipment directly over a drain. Steam
rising up out of the drain will adversely affect operation, air
circulation, and damage electrical /electronic components

• Do not install in an area where a high-pressure water jet
could be used for cleaning.

Heat of Rejection

Model BTU/hr

ND21TS00
ND21TS01
ND21TS02
ND21TS03
ND21TS04
ND21RS00
ND21RS02

REFRIGERANT CHARGE

1430 (0.42 kW)

Important

Due to continuous improvements, this information is for
reference only. Please refer to the serial number tag to verify..

Model Type Refrigerant Charge

ND21TS00
ND21TS01
ND21TS02
ND21TS03
ND21TS04
ND21RS00
ND21RS02

R404A 7.0 oz (198g)

Part Number 020007115 06/27/2019 11

General Information Section 1

ELECTRICAL

DANGER

Check all wiring connections, including factory terminals,
before operation. Connections can become loose during
shipment and installation.

Preparing the power cord (International units only)

The following instructions cover the installation of a 220 VAC,
50/60 Hz (international) unit. An appropriate 3-wire power
receptacle must be located within 6 ft (1.8 m) of the unit. Unpack
the unit from its transportation packaging and visually check for

Warning

n

The machine must be wired and grounded in
accordance with national and local electrical codes.

any signs of damage.

NOTE: Only use an approved plug for the country in which the
unit is being installed.

Important

Minimum Circuit Ampacity

The minimum circuit ampacity is used to help select the wire
size of the electrical supply. (Minimum circuit ampacity is not
the N2Fusion System’s running amp load.) The wire size (or
gauge) is also dependent upon location, materials used, length
of run, etc., it must be determined by a qualified electrician.

Voltage

A dedicated electrical circuit is required, a power cord is
provided with all units. Some models are available in different
voltages and may be equipped with a different plug.

The following precautions must be observed:

• The equipment must be grounded.

• A separate fuse/circuit breaker must be provided for
each unit.

• A qualified electrician must determine proper wire size
dependent upon location, materials used and length
of run (minimum circuit ampacity can be used to help
select the wire size).

• The maximum allowable voltage variation is ±10% of
the rated voltage at equipment start-up (when the
electrical load is highest).

• Check all green ground screws, cables and wire
connections to verify they are tight before start-up.

Minimum Circuit Amperage Chart

Important

Due to continuous improvements, this information is for
reference only. Please refer to the serial number tag to verify..

Model Voltage/Cycle/Phase

ND21TS00
ND21RS00
ND21TS01 220/60/1 2.5 A
ND21TS02
ND21RS02
ND21TS03 100/60/1 6.0 A
ND21TS04 100/50/1 6.0 A

115/60/1 6.0 A

220-230/50/1 2.5 A

Total

Amps

Breaker

HP

Size (Max)

1/5 15 A

The wires in the power cord/mains lead are colored in
accordance with the following code:

• Green / Yellow = Ground/Earth

• Blue = Neutral

• Brown = Line/Live

1. Locate a 3-terminal plug. This plug (not furnished with
unit) must have a ground-wire-connecting terminal.

2. Locate the loose end of the power cord attached to
the unit. All three (3) wires are stripped to 1/2” (1.3 cm)
length from the end.

3. Connect all three (3) wires to the plug using the
1/2” (1.3 cm) stripped ends or any other terminal
requirements. Different plugs and terminals may
require different stripped lengths.

4. Inspect the cord and plug connection for any loose or
bare wires.

Grounding Instructions

This appliance must be grounded/earthed. In the event
of malfunction or breakdown, grounding provides a
path of least resistance for electric current to reduce the
risk of electric shock. This appliance is equipped with a
cord having an equipment-grounding conductor and
a grounding plug. The plug must be plugged into an
appropriate outlet that is properly installed and grounded/
earthed in accordance with all local codes and ordinances.

Check with a qualified electrician or serviceman if the
grounding instructions are not completely understood or if
in doubt as to whether the product is properly grounded.

Do not modify the plug provided; if it will not fit the outlet,
have the proper outlet installed by a qualified electrician.

Do not use an extension cord or an adapter plug with this
equipment.

NOTE: For 220-240 VAC, 50/60 Hz International Units, a
ground male plug must be supplied at the installation of
the unit.

12 Part Number 020007115 06/27/2019

Section 1 General Information

Warning

n

When using electric appliances, basic precautions must
always be followed, including the following:

A. Read all the instructions before using the

appliance.

B. To reduce the risk of injury, close supervision

is necessary when an appliance is used near

children.
C. Do not contact moving parts.
D. Only use attachments recommended or sold by

the manufacturer.
E. Do not use outdoors.
F. For a cord-connected appliance, the following

must be included:

• Do not unplug by pulling on cord. To unplug,
grasp the plug, not the cord.

• Unplug from outlet when not in use and
before servicing or cleaning.

• Do not operate any appliance with a
damaged cord or plug, or after the appliance
malfunctions or is dropped or damaged in
any manner. Contact the nearest authorized
service facility for examination, repair, or
electrical or mechanical adjustment.

G. Follow applicable lock out tag out procedures

before working on equipment.

H. Connect to a properly grounded outlet only. See

Grounding Instructions.

SYSTEM PRESSURES

Supply to the Unit

Warning

n

Do Not exceed 90 psi (.621 MPa, 621 kPa, 6.21 bar) to
the unit! Excessive pressure to the unit may cause failure
and damage to the unit.

This table shows the Minimum / Maximum supply Nitrogen
required for each regulator at no flow conditions.

MINIMUM MAXIMUM

N₂ Supply

Primary

Regulator

Unit

Regulator 1

Keg

Unit

Regulator 2

Pump

(.586 MPa , 586 kPa, 5.86 bar)

85 psi

16 psi +/- 2 psi

(.110 MPa, 110 kPa, 1.10 bar)

34 psi +/- 2 psi

(.234 MPa, 234 kPa, 2.34 bar)

90 psi

(.621 MPa , 621 kPa, 6.21 bar)

Part Number 020007115 06/27/2019 13

General Information Section 1

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14 Part Number 020007115 06/27/2019

Section 2

Installation

Step-by-Step Installation

These instructions are provided to assist the qualified installer. Contact your Manitowoc Foodservice Service Agent or call
Manitowoc Foodservice for information regarding start-up services.

DANGER

Use appropriate safety equipment during installation
and servicing.

DANGER

Installation must comply with all applicable fire and
health codes in your jurisdiction.

Warning

n

Remove all removable panels before lifting and installing.

Warning

n

Do not damage the refrigeration circuit when installing,
maintaining or servicing the unit.

PREINSTALLATION CHECKLIST

Any damage should be noted and reported to the
delivering carrier immediately.

Check the lower portion of the unit to be sure
casters are not bent.

Visually inspect the refrigeration package,
compressor compartment housing. Be sure lines
are secure and base is still intact.

Inspect installation location behind the unit for
electrical outlet location and Nitrogen (N2).

Power unit up by plugging into power source.

Check for correct voltage at outlet dedicated for
the Nitrogen Beverage Dispenser.

Important

All plumbing must conform to local, state and national
codes.

Important

Failure to follow these installation guidelines may affect
warranty coverage.

Verify floor of install location is within 1/2” (1.3 cm)
of level front to back, side to side and all casters are
touching the floor.

Warning

n

The mass of this appliance will allow it to move
uncontrolled on an inclined surface. Adequate means
must be provided to prevent uncontrolled movement
at all times.

Check that internal connections are secure and did
not vibrate loose during shipment.

Installation location has proper ventilation where
unit has access to ambient air.

Part Number 020007115 06/27/2019 15

Installation Section 2

REMOTE TOWER INSTALLATION

These instructions are only for units that require remote

Mounting & Routing

placement of the dispensing tower. If this is a self contained
unit with out remote setup continue to “Nitrogen Regulator
& Tank Assembly” on page 17.

Checklist

Make sure the rubber counter top gasket is in place on
the tower before routing conduit and mounting tower.

Important

Tower location should be no more than 20.70in
(53cm) from edge of the counter.

TAP #2
Nitro/Gas

Mount tower within 6 linear ft (1.83m) from side of

TAP #1

Plain

base cabinet.

Make sure location has space for the drip tray
shipped with the unit.

NOTE: Drip trays equipped with a drain are also available
but are not standard equipment.

Location

1. Identify the counter top location for the tower making
sure there is room for the drip tray, conduit routing
under the counter, and is away from any heat source.

Important

If the drip tray is equipped with a drain make sure install
location is near a floor drain.

4. Route conduit from the tower down through the 2in
(5cm) hole and mount the tower to the counter top
with the provided plate and screws.

NOTE: Make sure the rubber gasket is properly seated on

To Cabinet

the tower and seals to the counter top.

2. Using the provided counter top template mark where
the 2in (5cm) conduit and tower mount screw holes will
be drilled.

5. Run the conduit from the tower to the N2Fusion™ cabinet.

6. Remove the two (2) screws from the solenoid cover
mounted to the inside top of the cabinet to gain access
to solenoids 1 and 2.

3. Cut and drill holes in the counter using the markings.

NOTE: Drip trays equipped with a drain will need a ⁄” (2.22cm)
hole drilled into the counter using the provided template for
routing to a floor drain.

7. Route tubing through the top of the cabinet and attach
to the corresponding solenoids.

NOTE: Tubing already routed to the solenoids in the cabinet
should be marked with yellow 1 & 2 stickers.

Warning

n

Do not add line to the conduit this can cause poor drink
quality and the unit may not perform properly.

16 Part Number 020007115 06/27/2019

Section 2 Installation

Important

Allow four (4)ft (1.22m) of tubing for a service loop to
allow the cabinet to be pulled out during service and
cleaning. Cut off extra tubing if needed.

8. Once connections have been made put the solenoid
cover back into place.

Drip tray

9. Place drip tray or drain pan in proper location lined up
below the dispensing taps.

Important

Drip trays equipped with a drain need to be sealed to
the counter top, be sure to follow all local codes.

NITROGEN REGULATOR & TANK ASSEMBLY

DANGER

Tank under high pressure. Do not drop or allow tank to
fall over. Tank must be chained and secured to prevent
movement as per OSHA requirements. Do not attempt to
handle or connect to tank unless properly trained.

Nitrogen cylinders contain high-pressure gas which can
be hazardous if not handled properly. Make sure you READ
and UNDERSTAND the following procedures for nitrogen
cylinders BEFORE installation.

Important

Use only food grade nitrogen (99.5% pure).

1. ALWAYS connect the nitrogen cylinder to the primary
regulator and NEVER directly to the unit, keg, or
dispensing system. Failure to do so could result in an
explosion with possible death or injury when the cylinder
valve is opened.

2. ALWAYS follow correct procedures when cylinders are
changed.

3. ALWAYS secure the cylinder in an upright position with a
chain.

4. NEVER drop or throw a nitrogen cylinder.

5. ALWAYS keep a nitrogen cylinder away from heat. Store
extra cylinders in a cool place (preferably 70ºF). Securely
fasten with a chain in an upright position when storing.

6. ALWAYS check the D.O.T. test date on the cylinder neck
before installation. Ask your gas supplier for D.O.T. test
requirements.

7. NEVER connect a product container unless there is a safety
in the pressure system at or on the nitrogen regulator.

Part Number 020007115 06/27/2019 17

Installation Section 2

D

E

A

DEVICE

NITROGEN INSTALLATION/REPLACEMENT

NOTE: During initial installation of the unit a bracket for the
nitrogen cylinder must be installed to solid wall nearby and
a chain used to secure it to the bracket.

Warning

n

Verify gauge orientation
before setting pressures!

B

100

1500

2000

1000

50

U

2500

L

R

500

USE NO OIL

LEFT

3000

psi

6

4

80

8

100

60

120

40

2

140

20

10

160

psi

LR

R

bar

150

bar

200

F

NITROGEN

NITROGEN

C

TO PRODUCT
CONTAINER

NITROGEN CONNECTIONS & PRESSURES

1. Set inlet from food grade nitrogen tank to back of the
dispenser to 85 - 90 psi
(.586 - .621 MPa, 586 - 621 kPa, 5.86 - 6.21 bar).

Line OUT

Pressure to Unit

Line IN

N Tank Pressure

Warning

n

Line Out Pressure

Do Not exceed 90 psi

(.621 MPa, 621 kPa, 6.21 bar)

to the unit!

INTEGRAL SAFETY

1. Make sure cylinder valve “A” is closed.

2. Unscrew (counter clockwise) regulator key “B” as far out
as it will go. (The regulator is now in the off position).

3. Remove regulator from empty cylinder at “D”.

4. Remove dust cap from new cylinder at “D”. Open and
close valve “A” quickly to blow dust from outlet.

5. With cylinder valve “A” in closed position, re-attach
regulator to cylinder at “D”.

6. Open valve “A” all the way. (This is important because
this cylinder valve seals in two places).

7. Screw regulator key “B” in (clockwise) until required
pressure is reached “E”.

NOTE: Drinks will not pour if outlet valve “A” is closed.

18 Part Number 020007115 06/27/2019

Section 2 Installation

N2 QUICK DISCONNECT & DRAIN

Caution

,

Installer should always check the locking collars on the taps
are tight prior to connecting the Nitrogen supply line. If
these collars are loose they can leak at the tower shank when
pressurized.

Flow
Control

Locking
Collar

Important

All plumbing must conform to local, state and national codes.

2. Hook up nitrogen supply line to quick disconnect.

3. Run drip pan drain line and purge tube to floor drain.

Drain Line

N2 Supply

Connection

KEG & PUMP REGULATORS

5. Once the nitrogen line is hooked up to the unit check the
pressures on the two (2) regulators located in the back of
the unit.

Regulator 1
Keg

Regulator 2
Nitrogenator

6. Verify the following pressures;

MINIMUM MAXIMUM

Unit

Regulator 1

Keg

Unit

Regulator 2

Pump

16 psi +/- 2 psi

(.110 MPa, 110 kPa, 1.10 bar)

34 psi +/- 2 psi

(.234 MPa, 234 kPa, 2.34 bar)

N2 Purge Tube

Floor Drain

2" Air Gap

NOTE: Purge tube releases under pressure, make sure it is
fastened down.

4. Ensure drain line is not kinked or otherwise blocked for
proper drainage.

7. If adjustment is required proceed to “Regulator
Adjustment Procedure” on page 20, if no ajustment is
needed proceed to “” on page 20

Part Number 020007115 06/27/2019 19

Installation Section 2

Regulator Adjustment Procedure

DANGER

12. Set each regulator by slowly turning the adjustment
knob clockwise to increase the pressure.

ELECTRICAL SHOCK HAZARD! The power supply is located
in the upper right behind the cover and has live heat sinks.
Unplug from power source when removing cover..

8. Unplug the unit from its power source.

9. Remove the rear panel to gain access to the regulators.

If the target pressure is missed and the regulator pressure
is too high, start over. Set the regulator back to zero then
relieve all system pressure from the keg and nitrogenator.
(See Step 11)

Important

A. Set Regulator 1- Nitrogen Tank to Coffee Keg.

• Set to 16 psi +/- 2 psi
(.110 MPa, 110 kPa, 1.10 bar).

• Push the yellow lock ring down to prevent the
adjustment knob from moving.

NOTE: Setting regulator 1 too high can cause the plain
coffee/product to nitrogenate.

Regulator 1
Keg

B. Set Regulator 2- Nitrogen Tank to Nitrogenator.

• Set to 34 psi +/- 2 psi

Regulator 2
Nitrogenator

(.234 MPa, 234 kPa, 2.34 bar).

• Push the yellow lock ring down to prevent the
adjustment knob from moving.

NOTE: Setting regulator 2 less than 32 psi(.221 MPa, 221 kPa,

2.21 bar) can prevent drinks from nitrogenating properly.

Shown with Rear Panel Removed

10. Unlock each regulator by pulling up on the yellow lock
ring and set to zero by turning the adjustment knob
counter clockwise.

11. Pull the keg pressure relief valve, then the nitrogenator
PRV until hissing stops and all pressure has been
relieved from the system.

13. Reattach the rear panel and plug unit back into its
power source.

20 Part Number 020007115 06/27/2019