Manitowoc Multiplex N2Fusion Service Manual

Page 1

™

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

Page 2

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

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

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

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

Warning

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

Warning

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

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

Page 3

Warning

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

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

Warning

Do not obstruct machine vents or openings.

Warning

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

Warning

Do not clean with water jet.

Warning

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

Warning

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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Page 5

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

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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

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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

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Page 9

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

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General Information Section 1

Specifications

DIMENSIONS

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) *

28.4”

(72cm)

20.7”

(53cm)

13.6”

(35cm)

16.1”

(41cm)

44.6”

(113cm)

10.6”

(27cm)

7.3”

(19cm)

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

Warning

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)

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Section 1 General Information

PRODUCT DELIVERY LOCATION

Warning

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

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

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

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

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

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)

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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

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

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.

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Page 13

Section 1 General Information

Warning

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.

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

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)

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General Information Section 1

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Page 15

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

Remove all removable panels before lifting and installing.

Warning

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

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.

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Page 16

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

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

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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.

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Installation Section 2

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

Verify gauge orientation before setting pressures!

100

1500

2000

1000

2500

500

USE NO OIL

LEFT

3000

psi

100

120

140

160

psi

bar

150

bar

200

NITROGEN

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

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.

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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

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Page 20

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

Page 21

Section 2 Installation

KEG CONNECTIONS

DANGER

Never stand directly over keg when connecting, disconnecting, or when keg is pressurized.

Connecting the Keg

DANGER

Never stand directly over keg when connecting, disconnecting, or when keg is pressurized.

Important

Only use AEB Kegs. Available from Manitowoc FoodService..

Keg Post Collars

1. Locate post collars and match the black to OUT post and gray to IN post.

Only use AEB Kegs. Available from Manitowoc Foodservice..

3. First connect the Black quick connect line to the connection labeled OUT on the coffee keg. This supplies coffee to Tap 1 and 2.

Important

Hook the OUT line up to the coffee keg first, this helps prime the system once the nitrogen IN line is connected to the tank.

Gray collar on IN connection

of each keg

Black collar on OUT connection of each keg

NOTE: Color coding allows partners to match the black connector to black collar and gray connector to gray collar.

2. Press each collar over the IN and OUT posts until they seat in the grove below the taper.

Collar Groove

Pull ring

while

connecting

to post then

release to

lock into

place.

4. Connect the Gray quick connect line second to the connection labeled IN on the coffee keg. This line supplies Nitrogen into tank. See “Keg Change” on page 24 &

“Priming the System” on page 25

5. The system is now ready to be primed.

Part Number 020007115 06/27/2019 21

Page 22

Installation Section 2

6. Press the Prime/Clean button, located in the upper left corner of the refrigeration cabinet, once to prime the coffee line. The LED around the button will flash ON once, then OFF signifying that the Prime function has been activated.

7. The pump may run for up to twenty (20) seconds while priming.

NOTE: If priming fails to complete the system will go into an error state and the Prime/Clean button LED will blink continuously until the error is cleared. See “Error Code” on

page 44

DOOR HINGE REVERSAL

Instructions for installations that require the cabinet door to be reversed.

1. Use a screwdriver to remove the top metal hinge pin.

NOTE: Lock-tight was used during factory installation, so extra force may be required.

2. Tilt door out from top and slide bottom pin out of the hinge bracket. Set door aside.

3. Remove both hinge brackets.

4. Move the nylon hole plug on top of door to hole on opposite end top of door.

5. Interchange the threaded metal hinge pin and the nylon hole plug on bottom of door.

NOTE: Lock-tight was used during factory installation, so extra force may be required.

6. Use the laser etch marks on the cabinet to drill 1/8” diameter holes for the hinge brackets.

7. Fasten bottom bracket to cabinet.

8. Install top bracket while door is in position.

9. Install nylon pins into old screw holes.

8. Once the system is primed it is ready to pour drinks.

9. Check the regulators to make sure the pressures have not changed and pour a few drinks from each tap to verify proper flow. Adjust pressures if needed.

10. Check for leaks inside the cabinet and at the taps.

11. Close cabinet door and unit is ready for use.

Laser Etch Marks

22 Part Number 020007115 06/27/2019

Page 23

Product Dispense Operation

Section 3

Operation

TAPS & NOZZLES

For best performance do not allow both taps to remain fully opened for extended periods of time.

PREREQUISITES:

• Line voltage must be supplied

• N2 pressure is supplied and regulated to the correct pressure.

• Keg is inserted in cabinet and correctly connected to adapter/tubing

• Coffee/Product is supplied at the correct pressure.

• The LDD sensor recognizes Coffee/Product in the line.

OPERATION

1. Plug the unit power cord into appropriate power source.

2. Nitrogenator tank fills.

3. Press and release the Prime/Clean button to prime the lines with product.

4. Using the manual beer style taps, dispense drinks.

TAP #1

Surface

Important

TAP #2 Contains an o-ring, diffuser disc, and diffuser.

• Tap 1 - Regular Coffee

• Tap 2 - Nitrogenized Coffee

HOW TO REMOVE NOZZLES

A. Rotate nozzle counter-clockwise by hand, no tool

should be required for removal.

NOTE: Be aware of the diffuser and o-ring in the tap 2 nitro nozzle. If they are taken out of the nozzle replace in the correct order as illustrated above.

HOW TO INSTALL NOZZLES

A. To re-install the nozzle, thread the nozzle back onto

the tap by turning clockwise and firmly hand tighten to prevent leaks, no tool required for installation.

TAP #2

Important

Coffee on tap 2 will not be nitrogenated properly if the correct nozzle with diffuser are not installed.

Part Number 020007115 06/27/2019 23

Page 24

Operation Section 3

FLOW CONTROL & LOCKING COLLAR

DO NOT adjust the flow control, it is set at the factory.

The locking collar keeps the tap tightened to the tower. A spanner wrench is required to properly tighten the collar and can be purchased from Manitowoc KitchenCare using part number (00681823).

Flow Control

Locking Collar

Spanner Wrench 00681823

KEG CHANGE

When a coffee keg is empty product will no longer dispense and the blue LED around the Prime/Clean button will blink constantly signifying the unit is in Error Mode.

NOTE: See “Error Code” on page 44 for more information

about the Error Code.

Important

Make sure new coffee keg has been chilled to the operating temperature range of 45° - 36°F (7° - 2°C) before use or may cause foaming in the system.

DANGER

Never stand directly over keg when connecting, disconnecting, or when keg is pressurized.

1. Disconnect the GAS IN (gray) fitting from the keg by pulling up on the ring around the connector to release from the post.

Pull up on

ring around

connector to release.

KEGS

Important

Only use AEB Kegs. Available from Manitowoc FoodService..

Pressure

Relief Valve

IN Post

(Grey

Nitrogen

Connector)

Warning

Do not attempt to remove lid until all pressure has been relieved from keg.

Lid

OUT Post (Black Coffee Connector)

2. Leave the COFFEE OUT (black) fitting connected to the keg.

Pull ring

to relieve

pressure

3. Pull up on the pressure relief ring on top of the keg (illustrated above) to vent the nitrogen from the keg and the system plumbing shown above.

NOTE: Hold the ring up until the system is fully vented (hissing gas stops).

4. Disconnect the COFFEE OUT (black) fitting from the keg and remove the keg.

5. Place new keg in cabinet

6. Connect the COFFEE OUT (black) fitting to the keg first then connect the GAS IN (gray) fitting.

7. Prime system by pressing the Prime/Clean button. See

“Priming the System” on page 25

8. Pour a drink out of each tap to see if beverage comes out, if not See “Troubleshooting Charts” on page 35.

24 Part Number 020007115 06/27/2019

Page 25

Section 3 Operation

PRIMING THE SYSTEM

See also “Prime/Clean Button” on page 43

NOTE: Priming is always required during keg change.

1. Press the Prime/Clean button, located in the upper left corner of the refrigeration cabinet, once to prime the coffee line. The LED around the button will flash ON once, then OFF signifying that the Prime function has been activated.

2. The pump will run for up to twenty (20) seconds while priming.

3. Once the system is primed it is ready to pour drinks.

4. Close cabinet door and unit is ready for use.

NOTE: See “Error Code” on page 44 if priming fails and the

LED blinks continuously.

NITROGENATOR

Nitrogen tank is equipped with a pressure relief valve that will automatically purge when pressure exceeds operating limit of the system of 100 psi (.689 MPa, 689 kPa, 6.89 bar). When valve relieves there may be a quick pressure relief sound heard coming from cabinet. Relief sound shouldn’t last more than a few seconds and may not be noticeable on an audible level.

Low Probe

(Black)

Liquid Inlet

(3/8" Flare)

N₂ Inlet

(1/4" Flare)

Common Probe

(White)

High Probe (Red)

Liquid Outlet (3/8" Flare)

PRV Pressure Relief Valve (1/4" Barb)

Part Number 020007115 06/27/2019 25

Page 26

Operation Section 3

Refrigerated Cabinet Operation

See “Controls/Programming/Settings” on page 44 for details on how to control settings for the refrigerated cabinet.

INLINE STRAINER

The in-line coffee strainer is located inside celling of the refrigeration cabinet. It filters out any coffee grounds and/or other foreign objects, preventing line clogs and dispense issues.

How to Inspect the In-line Strainer

1. Locate the in-line coffee strainer on the celling of the refrigeration cabinet.

Bowl

2. Look at the clear bowl to see if there are grounds or other debris in the strainer and clean if needed.

HOW TO REMOVE STRAINER

A. First depressurize the system and disconnect the keg.

See “Keg Change” on page 24

B. Put down a towel or small cloth to catch any coffee

that may still be in the line or bowl during removal.

C. Grasp the bowl and rotate counterclockwise to

loosen and remove the bowl.

Strainer

Gasket

Bowl

NOTE: The strainer is a metal mesh ring that will be located inside the bowl. Also be careful not to damage the rubber gasket that is seated in the bowl.

D. Visually inspect the clear strainer bowl for debris

and coffee grinds.

E. Rinse under tap water, clean and sanitize before

putting back into place.

F. Reassemble the bowl with mesh and gasket back in place.

G. Rotate bowl clockwise and hand tighten.

H. Reconnect the keg and check for leaks.

26 Part Number 020007115 06/27/2019

Page 27

General Maintenance

Section 4

Maintenance

This section covers common unit components and their care. The chart below is an overview of the maintenance that the end user and service technician should perform, and the frequency. These figures are the minimum required. If the condenser is dirty after one week, more frequent cleaning is recommended. (X = End User, S = Service Company)

NOTE: Cleaning items, other than the nozzle cleaning hoses, are not supplied with the N2Fusion™ Nitrogen Beverage Dispenser.

DANGER

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

DANGER

Failure to disconnect the power at the main power supply disconnect could result in serious injury or death. The power switch DOES NOT disconnect all incoming power.

DANGER

Disconnect electric power at the main power disconnect for all equipment being serviced. Observe correct polarity of incoming line voltage. Incorrect polarity can lead to erratic operation.

Warning

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

Warning

Disconnect power to the unit before performing any service or maintenance functions.

Important

Never use a high-pressure water jet for cleaning or hose down or flood interior or exterior of units with water. Do not use power cleaning equipment, steel wool, scrapers or wire brushes on stainless steel or painted surfaces..

Important

If the machine going to be shutdown for any length of time it is recommended to go through the Weekly Cleaning both prior to turning off the unit and when returned to use. See "Extended Shutdown Procedure" on

page 32

If the unit is turned off, the product will no longer be kept cool in the refrigeration cabinet, remove all kegs and keep refrigerated to prevent spoilage.

Warning

Never Use Steel Pads, Wire Brushes or Scrapers!

MAINTENANCE SCHEDULE

Maintenance Daily Weekly Monthly After Prolonged

Kegs X X

Interior X X X

Gasket X X X X

Exterior X X X

Drain X X X

Condenser Coil X X X

Casters X X X

When cleaning interior and exterior of unit, care should be taken to avoid electrical components and wiring. Keep water and/or cleaning solutions away from these parts.

Important

At Start-up

Shutdown

Part Number 020007115 06/27/2019 27

Page 28

Maintenance Section 4

DOOR GASKET MAINTENANCE

Door gaskets require regular cleaning to prevent mold and mildew buildup and also to retain the elasticity of the gasket. Gasket cleaning can be done with the use of warm soapy water. Avoid full strength cleaning products on gaskets as this can cause them to become brittle and crack. Never use sharp tools or knives to scrape or clean the gasket. Gaskets can be easily replaced and do not require the use of tools or an authorized service person. The gaskets are “Dart” style and can be pulled out of the groove in the door and new gaskets can be “pressed” back into place.

DRAIN MAINTENANCE  INSIDE LOWER CABINET

Each unit has a drain located inside the unit that removes the condensation from the evaporator coil and routes it to an external condensate evaporator pan. Each drain can become loose or disconnected during normal use. If you notice water accumulation on the inside of the unit, be sure the drain tube is connected to the evaporator drain pan. If water is collecting underneath the unit, make sure the end of the drain tube is in the condensate evaporator in the machine compartment. The leveling of the unit is important as the units are designed to drain properly when level. Be sure all drain lines are free of obstructions.

REFRIGERATORS

Warning

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

The interior and exterior can be cleaned using soap and warm water. If this isn’t sufficient, try ammonia and water or a nonabrasive liquid cleaner. When cleaning the exterior, always rub with the “grain” of the stainless steel to avoid marring the finish. Do not use an abrasive cleaner because it will scratch the stainless steel and can damage the breaker strips and gaskets.

STAINLESS STEEL CARE & CLEANING

To prevent discoloration or rust on stainless steel, several important steps need to be taken. First, we need to understand the properties of stainless steel. Stainless steel contains 70-80% iron, which will rust. It also contains 1230% chromium, which forms an invisible passive film over the steel’s surface, which acts as a shield against corrosion. As long as the protective layer is intact, the metal is still stainless. If the film is broken or contaminated, outside elements can begin to break down the steel and begin to form discoloration or rust. Proper cleaning of stainless steel requires soft cloths or plastic scouring pads.

Important

Never Use Steel Pads, Wire Brushes or Scrapers!

Cleaning solutions need to be alkaline based or nonchloride cleaners. Any cleaner containing chlorides will damage the protective film of the stainless steel. Chlorides are also commonly found in hard water, salts, and household and industrial cleaners. If cleaners containing chlorides are used, be sure to rinse repeatedly and dry thoroughly. Routine cleaning of stainless steel can be done with soap and water. Extreme stains or grease should be cleaned with a non-abrasive cleaner and plastic scrub pad. Always rub with the grain of the steel. There are stainless steel cleaners available which can restore and preserve the finish of the steel’s protective layer. Early signs of stainless steel breakdown are small pits and cracks. If this has begun, clean thoroughly and start to apply stainless steel cleaners in attempt to restore the passivity of the steel.

Caution

Never use an acid based cleaning solution! Many food products have an acidic content, which can deteriorate the finish. Be sure to clean the stainless steel surfaces of ALL food products. Common items include: tomatoes, peppers and other vegetables.

Caution

Never use a high-pressure water wash for this cleaning procedure as water can damage the electrical components located near or at the condenser coil.

28 Part Number 020007115 06/27/2019

Page 29

Section 4 Maintenance

DOORS/HINGES

Over time and with heavy use, doors and hinges may become loose. If this happens, tighten the screws that mount the hinge brackets to the frame of the unit. Loose or sagging doors can cause the hinges to pull out of the frame, which may damage both the doors and the hinges. In some cases this may require trained & qualified service agents or maintenance personnel to perform repairs.

NOTE: Do not place hot pans on/against the blue ABS liner. Do not throw items into the storage area. Failure to follow these recommendations could result in damage to the interior of the cabinet. Overloading the storage area, restricting the airflow, and continuous opening and closing of the doors will hamper the unit’s ability to maintain operational temperature.

PREVENTING CORROSION

Immediately wipe up all spills.

OTHER MONTHLY TASKS

Cleaning the Condenser Coil

In order to maintain proper refrigeration performance, the condenser fins must be cleaned of dust, dirt and grease regularly. It is recommended that this be done at least every three months. If conditions are such that the condenser is totally blocked in three months, the frequency of cleaning should be increased. Clean the condenser with a vacuum cleaner or stiff brush. If extremely dirty, a commercially available condenser cleaner may be required.

Failure to maintain a clean condenser coil can initially cause high temperatures and excessive run times. Continuous operation with a dirty or clogged condenser coil can result in compressor failure. Neglecting the condenser coil cleaning procedures will void any warranties associated with the compressor and cost to replace the compressor.

Caution

Never use a high-pressure water wash for this cleaning procedure as water can damage the electrical components located near or at the condenser coil.

GENERAL CLEANING

Interior Cleaning

Notice

When cleaning interior and exterior of unit, care should be taken to avoid the rear power cord. Keep water and/or cleaning solutions away from electrical parts.

Important

The interior can be cleaned using soap and warm water. If this isn’t sufficient, try ammonia and water or a nonabrasive liquid cleaner.

Exterior Cleaning

Caution

Never use an acid-based cleaning solution! Many food products have an acidic content, which can deteriorate the finish. Be sure to clean the stainless steel surfaces of ALL food products.

Clean the area around the unit as often as necessary to maintain cleanliness and efficient operation.

Wipe gasket and surfaces with a damp cloth rinsed in water to remove dust and dirt from the outside of the unit. Always rub with the “grain” of the stainless steel to avoid marring the finish. If a greasy residue persists, use a damp cloth rinsed in a mild dish soap and water solution. Wipe dry with a clean, soft cloth.

Never use steel wool or abrasive pads for cleaning. Never use chlorinated, citrus based or abrasive cleaners.

Stainless steel exterior panels have a clear coating that is stain resistant and easy to clean. Products containing abrasives will damage the coating and scratch the panels.

Daily cleaning may be followed by an application of stainless steel cleaner which will eliminate water spotting and fingerprints. Early signs of stainless steel breakdown are small pits and cracks. If this has begun, clean thoroughly and start to apply stainless steel cleaners in attempt to restore the steel.

Part Number 020007115 06/27/2019 29

Page 30

Maintenance Section 4

CLEANING SUPPLIES

1. Approved cleaner and sanitizer.

• An approved cleaner, such as Urnex® Cafiza® Espresso Machine Cleaner mixed one (1) teaspoon per gallon, must be used.

• Cleaner to be compatible with equipment metals and materials.

• Use a sanitizer capable of providing 400 ppm Quat, such as Urnex® Complete Cafe’™ mixed ½ oz per gallon.

3. Towels, wipes, brushes, and buckets.

• Use clean towels for any spilled fluid during cleaning process.

• Small cleaning wipes for cleaning top, sides, and interior of unit.

• A small brush is useful to clean keg connections

• Small bucket should be available for dipping keg connections into sanitizer.

4. Spray bottles and PPE (gloves, goggles).

Warning

Powdered cleaners and sanitizers must be thoroughly mixed into water/solution to prevent crystals from remaining and causing damage to system components.

2. Three (3) clean and sanitized three (3) gallon pressure kegs.

• One (1) for cleaning solution.

• Two (2) for sanitizing solution.

Important

Kegs used for cleaning, sanitizing solutions and rinse water should be emptied and cleaned before reuse.

Warning

When in contact with cleaning and sanitizing solution chemicals gloves and safety glasses are recommended.

• Use spray bottle when wiping down surfaces and other exterior parts.

• Gloves and eye protection should be worn to lessen chance of irritation or injury.

30 Part Number 020007115 06/27/2019

Page 31

Section 4 Maintenance

DAILY & WEEKLY CLEANING

Daily Cleaning

Daily cleaning consists of the following:

• Wiping down the units interior and exterior with an approved cleaner and sanitizer.

• Checking taps for obstructions and proper flow.

• Cleaning the In-Line Strainer See "How to Inspect the In-

Weekly Cleaning

Weekly cleaning consists of the following:

• De-pressurizing the system

• Cleaning the In-Line Strainer

• Mixing approved cleaning & sanitizing solutions

• Keg connectors cleaning & sanitizing

line Strainer" on page 26

• Using the Prime/Clean button to perform system

• Drain cleaning

cleaning & sanitizing.

• Pulling unit out and cleaning around the cabinet.

• Manual Keg Cleaning

Sanitizing

Cleaning Hoses

Add sanitizer to spray bottle mixed to 400 ppm Quat concentration and spray all external surfaces. Allow to remain for 15 minutes, or as directed by manufacturer, before wiping off.

Caution

Attention and care should be used to avoid spraying any electrical component (fans, thermostat and sensor

Prime/Clean

Button

Cleaning

Keg

5 Gallon Bucket

connections) with any of the fluids.

TAP #1

Surface

Important

TAP #2 Contains an o-ring, diffuser disc, and diffuser.

TAP #2

NOTE: If removing tap nozzles to clean/sanitize, tap 2 contains a diffuser. DO NOT lose the diffuser and make sure it is put back on tap 2 after cleaning/sanitizing.

Full daily cleaning steps can be found in the Installation Operation & Maintenance manual that ships with the unit (part number 9290312).

• Performing Daily Cleaning

Button Illuminations and modes:

• To abort cleaning mode press and hold the cleaning button until the LED around the Prime/Clean button turns OFF. This exits cleaning mode into keg change mode and LED will no longer be illuminated.

Important

If cleaning mode is accidentally aborted or aborted because of an issue/reason, then the cleaning process will need to start over from the beginning after a two (2) minute wait.

NOTE: If an error is encountered at any time during cleaning process the cleaning button will blink ON/OFF rapidly indicating unit is in an error state and cleaning process has stopped.

To exit error state close both taps then press and hold the Clean/Prime button until the LED around the button turns OFF to clear error state and exit into keg change mode.

Once error state is cleared the cleaning process can be started over after a two (2) minute wait.

NOTE: Priming is required after aborting cleaning or clearing an error. See "Priming the System" on page 25

Part Number 020007115 06/27/2019 31

Page 32

Maintenance Section 4

Extended Shutdown Procedure

The following is the recommended shutdown or idle time procedure for Nitro coffee units.

1. Begin running the weekly cleaning and sanitizing procedure as explained in the Installation, Operations & Maintenance manual.

Cleaning Hoses

Prime/Clean

Button

Cleaning

Keg

5 Gallon Bucket

2. Purge all sanitizer out from last cycle.

Warning

This equipment is intended for indoor use only. DO NOT install, operate or store this equipment in outdoor areas or where the unit may be subject to freezing temperatures.

Warning

DO NOT leave sanitizer in system for extended periods of time, this could cause damage to unit.

4. Upon recommissioning the unit would require weekly cleaning and sanitizing performed again prior to use.

5. Once cleaned a product keg can be place in the unit, connected, and primed.

6. The unit is now ready to be put back into use.

Cleaning Hoses

Prime/Clean

Button

Sanitizing

Keg

5 Gallon Bucket

3. Following completion of the second sanitizing keg;

A. Close the taps/system

B. Leave only nitrogen in the system until unit is

placed back in service.

32 Part Number 020007115 06/27/2019

Page 33

Section 4 Maintenance

Other Operations

DOORS/HINGES

Over time and with heavy-use doors, the hinges may become loose. If this happens, tighten the screws that mount the hinge brackets to the frame of the unit. Loose or sagging doors can cause the hinges to pull out of the frame, which may damage both the doors and the hinges. In some cases this may require qualified service agents or maintenance personnel to perform repairs.

Door Adjustment

If the door needs lowering at the handle, use a 5/16” (8mm) wrench to loosen the hinge screws and install a spacer outside of the hinge. Tighten the screws.

If the door needs to be higher at the handle, use a 5/16” (8mm) wrench to loosen the hinge screws and install a spacer inside of the hinge. Tighten the screws.

Part Number 020007115 06/27/2019 33

Page 34

Maintenance Section 4

THIS PAGE INTENTIONALLY LEFT BLANK

34 Part Number 020007115 06/27/2019

Page 35

Section 5

Troubleshooting

Troubleshooting Charts

See also “Dispensing Flowchart” on page 36

DISPENSING ISSUES

Problem Cause Correction

Coffee does not dispense Power Is there power to the unit? Plug in unit.

Product keg is empty Change out the product keg. See “Keg Change”

on page 24

Keg connectors not connected Chec k keg conne ctors , See “Keg Change” on page

Low / No Nitrogen pressure. Open Nitrogen tank valve, adjust pressure,

or change N2 supply tank. See “Nitrogen

Installation/Replacement” on page 18

Nitrogen supply tank is empty Change out the Nitrogen supply tank. See

“Nitrogen Installation/Replacement” on page

Debris in in-line strainer/filter Clean filter. See “How to Inspect the In-line Strainer”

on page 26

Product line is not primed Press the Prim/Clean button for one second to

prime system

Stuck in clean cycle Is Prime/Clean LED ON , press & hold till turns OFF

Error mode, Prime/Clean button blinking See “Error Code” on page 44

Nitrogen Supply Tank OFF Turned OFF when tank was swapped/installed. Check Nitrogen tank. See “Nitrogen Installation/

Tank incorrectly shut OFF during keg change.

The coffee seems to be watery Is the cleaning / purge light button on Finish cycle & replace the product keg. See “Keg

The coffee is warmer than expected Verify the thermometer reads below 50°F Refer to refrigeration section checklist. See

“Controls/Programming/Settings” on page 44

Coffee keeps leaking from the clear

drain hose

There is a hissing sound coming from

the nitrogen tank

The nitrogenator tank relief valve is stuck open Close or replace.

Regulator nut Tighten regulator nut. See “Nitrogen Regulator

Check for missing washer inside of regulator nut.

Replacement” on page 18

Change” on page 24

and See “Keg Change” on page 24

& Tank Assembly” on page 17

There is a puddle of product on the floor Drain tube Check to see of cabinet drain is in the floor drain.

See “N2 Quick Disconnect & Drain” on page 19

The drain pan under the taps has

standing coffee

Product does not appear to be

nitrogenated

Product flowing slow from valve Debris in nozzle Remove nozzle and clean. See “How to Remove

Foam dispensing from valve Cold brew temp above 45 degrees Attach keg of cold brew that is chilled to below

Pinched or clogged drain line Clean out drain line.

Replace drain line.

Nitro Coffee nozzle does not have diffuser

installed

Debris in filter Remove and Clean Filter. See “In-Line Strainer”

Check Nitro pressure gauge Make sure pressures are set correctly. See

Nitrogen pump not running Call for service

If no other cause was found, the flow control

collar on valve may be out of adjustment

Check cold brew nozzle to see if nozzles were reversed. Nozzle with diffuser disc is intended

to be installed on the Nitro side of the tower.

Nozzles” on page 23

“Nitrogen Connections & Pressures” on page 18

and “Keg & Pump Regulators” on page 19

Call Service to have adjusted.

45°F. See “Keg Change” on page 24

on page 26

Part Number 020007115 06/27/2019 35

Page 36

Troubleshooting Section 5

DISPENSING ISSUES

Problem Cause Correction

Cleaning button blinking ON/OFF rapidly Unit is in an error state and cleaning process has

stopped., keg empty.

System fails to prime.

Pump runs continuously for >5 minutes.

Hold Prime/Clean button until the LED turns

OFF. (See “Error Code” on page 44) Replace keg

if needed then press and release the Prime/

Clean button again to prime the new keg.

Cleaning process can be started over after a two

(2) minute wait.

Keg connectors won’t go onto the keg

posts

Not pulling up on the connector release ring

Incorrect connector Make sure the IN connector is gray and the OUT

connector is black. See “Keg Change” on page 24

Pull up on the ring around the connector to

while connecting

allow it to slip over the IN or OUT post and lock

into place. See “Keg Change” on page 24

DISPENSING FLOWCHART

UNIT NOT

DISPENSING ONE OR

BOTH TAPS

VERIFY GREEN LIGHT IS ON AT

VERIFY WIRING TO

PLC AND PINS

INSERTED

ONLY GAS FROM

NITRO TAP

YES

NITROGENATOR TANK EMPTY -SEE NO PUMP

VERIFY NON-

EMPTY KEG

CONNECTED

IS 120VAC AT POWER

SUPPLY INLET

CONNECTOR

VERIFY STORE N GAS

TANK CONNECTED AND

REGULATED AT 90PSI

CHECK POWER

HARNESS ON

CHECK FOR DEBRIS IN

NOZZLE AND VERIFY VERI

FLOW OPENED

VERIFY POWERCORD AND OUTLET

YES

IS 24VDC AT

POWER SUPPLY

OUTLET

REPLACE POWER

SUPPLY

YES

ARE BOTH

INLINE FUSES

REPLACE ONE,

OR BOTH, FUSES

YES

REPAIR OR REPLACE

AS NEEDED

REPAIR OR REPLACE

AS NEEDED

REPLACE PRESS

SWITCH

YES

VERIFY GAS PRESSURE

CHECK WIRING FROM

PLC O-01 TO

SOLENOIDS

REPLACE ONE OR

BOTH SOLENOIDS

CHECK WIRING

FROM FUSE TO PLC

CM1

TO SWITCH IS

YES

IS THERE

+24VDC AT PLC

IF WIRING OK REPLACE PLC

YES

VERIFY WIRE INSERTED

PROPERLY AT PLC I-01, WIRING

TO PRESSURE SW

VERIFY +24VDC ON

PLC PIN O-01 AND PIN

INSERTED

YES

VERIFY +24VDC ON

RED WIRE TO PRESS

VERIFY +24VDC AT

BOTH TAP

SOLENOIDS

VERIFY +24VDC ON

PLC CM1 AND PIN

INSERTED

36 Part Number 020007115 06/27/2019

Page 37

Section 5 Troubleshooting

POURING

If coffee does not pour out of taps items to check are;

1. Verify connections to keg and if coffee keg is empty. If keg is empty follow replacement steps on page 24.

2. If keg has coffee check nitrogen level at nitrogen tank.

• If outlet pressure drops below 85 - 90 PSI or tank volume is low replace tank and connect as shown on page 18.

COFFEE DISPENSE SYSTEM

Beverage System Diagnostics

1. Is in line voltage is supplied?

2. Is Nitrogen supply sufficient, turned ON and connected to the unit? See “Nitrogen Installation/Replacement” on page

3. Is Nitrogen supply pressure to unit between 85 - 90 psi (.586 - .621 MPa, 586 - 621 kPa, 5.86 - 6.21 bar)? See

“System Pressures” on page 13

4. Is Regulator 1- Nitrogen Tank to Coffee Keg set to 16 psi +/- 2 psi (.110 MPa, 110 kPa, 1.10 bar)? See “System

Pressures” on page 13

5. Is Regulator 2- Nitrogen Tank to Nitrogenator set to 34 psi +/- 2 psi (.234 MPa, 234 kPa, 2.34 bar)? See “System

Pressures” on page 13

6. Is keg inserted in the cabinet and correctly connected to the keg connectors? See “Kegs” on page 24

7. Has the unit been primed? See “Priming the System” on

page 25

8. Is the unit in an error state, Prime/Clean Button LED continuously blinks? See “Error Code” on page 44

Part Number 020007115 06/27/2019 37

Page 38

Troubleshooting Section 5

PUMP FLOWCHART

PUMP WILL NOT

FUNCTION

VERIFY +24VDC TO PLC -GREEN LIGHT

REPLACE PLC

VERFIY N GAS TANK

CONNECTED AND

REGULATOR VALUE 90PSI

VERIFY TUBING FROM N GAS TANK TO UNIT PRESS SW

VERIFY 120VAC AT

POWER SUPPLY

INLET CONNECTOR

CHECK POWER

HARNESS ON

VERIFY POWERCORD AND OUTLET

YES

IS 24VDC AT

POWER SUPPLY

OUTLET

REPLACE POWER

SUPPLY

YES

ARE BOTH

INLINE FUSES

REPLACE ONE,

OR BOTH, FUSES

YES

VERIFY +15VDC AT

PLC PIN I-06

VERIFY WIRING

BETWEEN PLC AND

YES

VERFIY LDD HAS

FLUID AND TUBING

CONNECTED

CHECK INLINE

FILTER AND CLEAN

CHECK KEG CONNECTION,

TUBING, AND ATTEMPT TO

PRIME UNIT

DID UNIT PRIME AND PUMP NOW

FUNCTION

VERIFY PRIME

BUTTON SWITCH IS

FUNCTIONAL

YES

ISSUE

RESOLVED

REPLACE PRIME BUTTON SWITCH

YES

CONNECT TANK AND

SET REGULATOR

YES

IS THERE

+24VDC AT PLC

VERIFY WIRE INSERTED

PROPERLY AT PLC I-01, WIRING

TO PRESSURE SW

VERIFY +24VDC ON

RED WIRE TO PRESS

YES

REPLACE PRESS

SWITCH

YES

VERIFY +24VDC ON

PLC PIN CM0

VERIFY WIRING ON

PLC PINS +DC24,

REPLACE OR

REPAIR WIRING

YES

VERIFY WIRING

FROM PLC RELAY TO

PUMP

REPLACE OR

REPAIR PROBE

WIRING

IF PLC PIN O-00 JUMPERED

TO +24VDC DOES PUMP

FUNCTION

VERIFY PROBE

WIRING TO NITRO

BOARD

VERIFY HARNESS

CORRECTLY SEATED

ON PROBES

IS THERE +24VDC AT

PLC PIN 1(-)

YES

VERIFY 115+VAC AT

PLC RELAY PIN 14

IS THERE +115VAC AT PLC RELAY PIN

REPLACE PLC

RELAY

YES

VERIFY 115+VAC AT

PUMP CONNECTOR

PIN 1

REPLACE OR REPAIR

YES

PUMP HARNESS

VERIFY WIRING TO RELAY FROM UNIT

YES

REPLACE PUMP

ASSEMBLY

YES

REPLACE PUMP

ASSEMBLY

38 Part Number 020007115 06/27/2019

Page 39

Section 5 Troubleshooting

NO POWER FLOWCHART

UNIT HAS NO

POWER

IS UNIT

PLUGGED IN

YES

PLUG UNIT IN ISSUE

DOES UNIT

HAVE POWER

IF NO POWER

YES

See also “Refrigerated Cabinet Flowchart” on page 40

REFRIGERATOR CABINET ISSUES

Problem Cause Correction

Cabinet not running Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker.

Power cord unplugged. Plug in power cord.

Thermostat set too high. Set thermostat to lower temperature.

Condensing unit runs for long periods

or continuously

Cabinet temperature is too high Thermostat set too high. Set thermostat to lower temperature.

Excessive amount of warm product placed in

Allow adequate time for product to cool down.

cabinet.

Prolonged door openings or door(s) ajar. Make sure door(s) are closed when not in use.

Avoid prolonged door openings.

Door gasket(s) not sealing properly. Check gasket condition. Adjust door or replace

gasket if necessary.

Dirty condenser coil. Clean the condenser coil.

Evaporator coil iced over. "Turn unit off and allow coil to defrost. Make

sure thermostat is not set too cold.

Also, check gasket condition."

RESOLVED

VERIFY

POWERCORD

Poor air circulation in cabinet. Re-arrange product to allow proper air

circulation.

Excessive amount of warm product placed in

Allow adequate time for product to cool down.

cabinet.

Prolonged door openings or door(s) ajar. "Make sure door(s) are closed when not in use.

Avoid prolonged door openings."

Dirty condenser coil. Clean the condenser coil.

Evaporator coil iced over. "Turn unit off and allow coil to defrost. Make

sure thermostat is not set too cold.

Also, check gasket condition."

Cabinet is noisy Loose part(s). Locate and tighten loose part(s).

Refrigerator is freezing product Thermostat is set too low. Set thermostat to higher temperature.

Dirty condenser coil. Clean the condenser coil.

Not enough cabinet clearance for proper

refrigeration system operation.

Move cabinet or make other adjustments to

gain proper cabinet clearances.

Compressor will not start Low voltage to cabinet. Check and correct incoming voltage to cabinet.

Leaking internally Check the in-line filter bowl and o-ring. May need to depressurize the unit and remove

the filter bowl to check. See “How to Inspect the

In-line Strainer” on page 26

Part Number 020007115 06/27/2019 39

Page 40

Troubleshooting Section 5

REFRIGERATED CABINET FLOWCHART

Power Supplied?

Yes

Evaporator Fan

Energized?

Yes

Refrigerator Is

Warm?

Yes

Temperature Set

45º- 36º

Power To Fan Motor?

Refrigerator Is

Cooling Product?

Reset Temperature

Plug In, Reset Breaker

Repair Wiring

Too Much Warm Product,

Too Many Door Openings,

Ice On Evaporator Coil

Fan Not Energized

Yes No

Yes

Shaft Turns?

Yes

Adjusting Opens

Thermostat?

Yes

Replace Motor

Replace Fan Blade

Replace Thermostat

Verify New Setting Cycles

Machine On/Off

Yes

Verify:

Compressor Startup

Check:

High Ambient

Compressor On?

Yes

Compressor Runs

Continuous?

Compressor Overload is Closed

Start Components Function

Condenser Fan Motor Functions

Voltage Must Be Within 10% Of Nameplate At

Temperature Set Too Low

Ice On Evaporator Coil

Low On Refrigerant

Restricted Clearances

Dirty Condenser Coil

40 Part Number 020007115 06/27/2019

Page 41

Section 5 Troubleshooting

CABINET TEMPERATURE OUT OF RANGE

Check Refrigeration System & Door Seal

Temperature in reach-in unit above or below acceptable limits.

Above temperature limit:

• Verify Cabinet temperate is above 5.5°C/42°F.

• Compare temps on internal gauge.

• Check evaporator fan for proper operation.

HIGH PRODUCT TEMPERATURE

Check Duct Cooling Fan

• Product temperature is greater than 42°F.

• Verify the door was not left open or warm product was added.

• Reboot machine by unplugging, waiting 30 seconds, then plugging back in.

• Verify duct fan is operating.

• Allow machine to run for 15 minutes and prime product.

• If fault remains check duct temperature with a digital thermometer to determine if refrigeration diagnostics need to be performed.

• Verify door is closed and door gasket is in place.

• If all above are within Spec’s refer to Refrigeration diagnostics. See “Refrigeration System Diagnostics” on page 42.

Below temperature limit:

• Compare temps on internal gauge.

• Check temperature control.

Part Number 020007115 06/27/2019 41

Page 42

Troubleshooting Section 5

Refrigeration System Diagnostics

REFRIGERATION SYSTEM CHECKLISTS

Installation/Visual Inspection Checklist

Inadequate Clearances

• Check all clearances, on sides and back.

Sides 0" (0 cm)

Back 3” (76mm)

Front 30" (76 cm)

Condenser is dirty

• Clean the condenser

DISCHARGE PRESSURE HIGH CHECKLIST

Air Condenser

• Dirty condenser fins

• High inlet air temperature

• Condenser discharge air recirculation

• Defective fan motor

Other

• Overcharged

• Non-condensable (air) in system

• Wrong type of refrigerant

• Non-OEM components in system

• High side refrigerant lines/component restricted

DISCHARGE PRESSURE LOW CHECKLIST

• Undercharged

• Wrong type of refrigerant

• Non-OEM components in system

SUCTION PRESSURE HIGH CHECKLIST

Improper Installation

• Refer to “Installation/Visual Inspection Checklist”

Discharge Pressure

• Discharge pressure is too high and is affecting suction pressure

Improper Refrigerant Charge

• Overcharged (also see “Freeze Cycle Discharge Pressure High Checklist” )

• Wrong type of refrigerant

• Non condensible in system

Components

• Defective compressor

Other

• Non-OEM components in system

SUCTION PRESSURE LOW CHECKLIST

Improper Installation

• Refer to “Installation/Visual Inspection Checklist”

Discharge Pressure

• Discharge pressure is too low and is affecting low side – refer to “Freeze Cycle Discharge Pressure Low Checklist”

Improper Refrigerant Charge

• Undercharged

• Wrong type of refrigerant

Other

• Non-OEM components in system

• Restricted/plugged liquid line drier

• Restricted/plugged tubing in suction side or liquid line of refrigeration system

42 Part Number 020007115 06/27/2019

Page 43

Section 6

Controls

Prime/Clean Button

The Prime/Clean button is located in the upper left corner of the refrigeration cabinet. This button is used for priming the system with coffee, cleaning, and displaying error codes using the blue LED ring around the button.

PRIMING MODE

• Press once to prime the coffee line. The LED around the button will flash ON once, then OFF signifying that the Prime function has been activated.

NOTE: The pump will run for up to twenty (20) seconds while priming. Once the system is primed it is ready to pour drinks.

Priming the System

Important

Priming is always required during keg change.

The following table lists the Prime/Clean Button functions and

state the LED is in during each mode.

PRIME /CLEAN BUTTON FUNCTIONS

Mode LED

Dispense

and/or Keg

Change

Prime Blinks once then OFF when button is pressed

Cleaning ON constant after button pressed and held

Error Blinks constantly

NOTE: Error mode can be caused by the following;

A. Keg Needs Primed or Failed to Prime B. Keg is Empty

OFF

Important

DO NOT put unit into cleaning mode with coffee keg connected! This empty the keg and pump coffee down the drain!

NOTE: If cleaning mode is accidentally entered with a coffee keg attached immediately press and hold the Prime/Clean button until the LED turns OFF. Priming may be required to put the unit back into dispense mode.

2. The pump may run for up to twenty (20) seconds while priming.

Important

If priming fails to complete the system will go into an error state and the Prime/Clean button LED will blink continuously until the error is cleared.

NOTE: If error occurs See “Error Code” on page 44

3. Once the system is primed it is ready to pour drinks.

4. Close cabinet door and unit is ready for use.

Part Number 020007115 06/27/2019 43

Page 44

Controls Section 6

CLEANING MODE

• Press and hold the Prime/Clean button until the LED around the button turns on to place the unit into cleaning mode.

• Cleaning button will illuminate blue in color around the button indicating unit is in cleaning mode.

Abort Cleaning Mode

• To abort cleaning mode press and hold the cleaning button until the LED around the Prime/Clean button turns OFF.

NOTE: This exits cleaning mode into keg change mode and LED will no longer be illuminated. Priming is required after aborting cleaning or clearing an error. See “Priming the System” on

page 43

Important

If cleaning mode is accidentally aborted or aborted because of an issue/reason, then the cleaning process will need to start over from the beginning after a two (2) minute wait.

For an overview on cleaning “Daily & Weekly Cleaning” on page 31. For step by step cleaning please refer to the manual that ships with the unit, part number 9290312

Refrigerated Cabinet

CONTROLS/PROGRAMMING/SETTINGS

After the unit is connected to power it will automatically begin operating. With the doors closed, the temperature of the cabinet should reach 36°F to 40°F (2°C to 4°C) in about one hour.

A thermostat located in the evaporator housing on interior rear of the unit, controls the temperature in the unit. The factory setting for the control is 4 and maintains about 38°F (3°C) in the box. Set toward 1 for higher temperatures and toward 7 for lower temperatures.

ERROR CODE

The Prime/Clean Button LED will blink ON/OFF rapidly indicating unit is in an error state.

NOTE: Error mode can be caused by the following;

A. Keg Needs Primed or Failed to Prime B. Keg is Empty

Clearing Error Code

To exit error state;

• Close both taps if open

• Press and hold the Prime/Clean button until the LED around the button turns OFF.

This clears the error state and exits into keg change mode.

NOTE: Priming is required after aborting cleaning or clearing an error. See “Priming the System” on page 43. Once an error state is cleared the cleaning process can be started over after a two (2) minute wait.

Refrigerators defrost automatically with every cycle of the compressor. The water generated is routed to a pan on the rear of the unit and is evaporated by the heat given off by the compressor.

NOTE: During normal operation the evaporator fan runs continuously.

44 Part Number 020007115 06/27/2019

Page 45

Component Identification

EXTERNAL

Front

Section 7

Component Check Procedures

Back

TAP #1

Nozzle

Drain

Cabinet

Door

TAP #2

Nozzle with Diffuser

Tow er

N Quick Connect

Sensor Control Board

Power Supply

PLC

Compressor

Part Number 020007115 06/27/2019 45

Page 46

Component Check Procedures Section 7

POWER SUPPLY

Location

The 24 VDC power supply is located behind the left side panel.

Function

Reduces and converts voltage for use on the control circuit.

Specifications

Steps down voltage from:

90 - 264/50-60/1 VAC to 24 VDC 8.4 A

Check Procedure

1. Inspect for correct wiring.

2. Check for line voltage at transformer primary CN1.

• No line voltage present - Refer to power relay and toggle switch check procedures.

• Line voltage present - Continue diagnostics.

3. Check voltage at transformer secondary CN3.

• 24 VDC present - Transformer is OK.

• 24 VDC is not present - Isolate secondary wiring and check for 24 VDC.

• 24 VDC present - Repair wiring or replace effected component(s).

• 24 VDC is not present - Replace Power Supply.

• One LED light - constant on to indicate power is applied - located at the lower left corner of CN3.

POWER SUPPLY BOARD

HIGH PRESSURE CUTOUT HPCO CONTROL

Function

Protects the compressor by interrupting the control signal to the control board. Excessive high side pressure operates the HPCO. The HPCO control is normally closed, and opens on a rise in discharge pressure.

Location

Above the ice compressor.

Specification

Refrigerant Type Cut-Out Cut-In

R404A 2413 kPa ±24.13

R290

The HPCO automatically resets when the pressure drops below the cut-in

bar ±.69

350 psig ±10

1723 kPa 17.23 bar ±.69

250 psig ±10

Check Procedure

1. Verify the filter and condenser are clean.

2. With power off, isolate by disconnecting the wiring connectors.

3. Check continuity across the terminals with an ohm meter.

• Low resistance = Continuity is good.

• Open (OL) = Replace HPCO.

4. Replace wires on HPCO terminals and also connect volt meter across the HPCO terminals.

5. Install a high side gauge and initiate a start sequence.

6. Watch the refrigerant pressures when the compressor starts.

• HPCO opens below cut-out set-point - Replace the HPCO

• HPCO opens above cut-out set-point - Locate the root cause - Fan motor defective, dirty condenser, refrigeration system issue, etc.

46 Part Number 020007115 06/27/2019

Page 47

Section 7 Component Check Procedures

COMPRESSOR ELECTRICAL DIAGNOSTICS

The compressor does not start or will trip repeatedly on overload.

Check Resistance (Ohm) Values

NOTE: Compressor windings can have very low ohm values. Use a properly calibrated meter.

Perform the resistance test after the compressor cools. The compressor dome should be cool enough to touch (below 120°F/49°C) to assure that the overload is closed and the resistance readings will be accurate.

SINGLE PHASE COMPRESSORS

1. Disconnect power then remove the wires from the compressor terminals.

2. The resistance values between C and S and between C and R, when added together, should equal the resistance value between S and R.

3. If the overload is open, there will be a resistance reading between S and R, and open readings between C and S and between C and R. Allow the compressor to cool, then check the readings again.

CHECK MOTOR WINDINGS TO GROUND Check continuity between all three terminals and the

compressor shell or copper refrigeration line. Scrape metal surface to get good contact. If continuity is present, the compressor windings are grounded and the compressor should be replaced.

DIAGNOSING START COMPONENTS

If the compressor attempts to start, or hums and trips the overload protector, check the start components before replacing the compressor.

Capacitor

Visual evidence of capacitor failure can include a bulged terminal end or a ruptured membrane. Do not assume a capacitor is good if no visual evidence is present. A good test is to install a known good substitute capacitor. Use a capacitor tester when checking a suspect capacitor. Clip the bleed resistor off the capacitor terminals before testing.

Relay

The relay has a set of contacts that connect and disconnect the start capacitor from the compressor start winding. The contacts on the relay are normally closed (start capacitor in series with the start winding). The relay senses the voltage generated by the start winding and opens the contacts as the compressor motor starts. The contacts remain open until the compressor is de-energized.

RELAY OPERATION CHECK

1. Disconnect wires from relay terminals.

2. Check the relay coil. Measure the resistance between terminals 2 and 5. No resistance indicates an open coil. Replace the relay.

COMPRESSOR DRAWING LOCKED ROTOR To determine if the compressor is seized, check the amp

draw while the compressor is trying to start.

The two likely causes of this are a defective starting component or a mechanically seized compressor.

To determine which you have:

1. Install high and low side gauges.

2. Try to start the compressor.

3. Watch the pressures closely.

A. If the pressures do not move, the compressor is

seized. Replace the compressor.

B. If the pressures move, the compressor is turning

slowly and is not seized. Check the capacitors and relay.

COMPRESSOR DRAWING HIGH AMPS The continuous amperage draw on start-up should not be

near the maximum fuse size indicated on the serial tag.

Part Number 020007115 06/27/2019 47

Page 48

Component Check Procedures Section 7

COMPRESSOR ELECTRICAL DIAGNOSTICS

Location

On the base unit behind the rear panels.

Specification

R-290 220-240/50 - 1/5HP, TL4CN

Check Procedure - The compressor does not start or will trip repeatedly on overload

CHECK RESISTANCE OHM VALUES Compressor windings can have very low ohm values. Use a

properly calibrated meter.

SINGLE PHASE COMPRESSORS Disconnect power, then remove the wires from the

compressor terminals.

The resistance values between C and S and between C and R, when added together, should equal the resistance value between S and R.

If the overload is open, there will be a resistance reading between S and R, and open readings between C and S and between C and R. Allow the compressor to cool, then check the readings again.

CHECK MOTOR WINDINGS TO GROUND Check continuity between all three terminals and the

compressor shell or copper refrigeration line. Scrape metal surface to get good contact. If continuity is present, the compressor windings are grounded and the compressor should be replaced.

COMPRESSOR DRAWING LOCKED ROTOR

To determine if the compressor is seized, check the amp draw while the compressor is trying to start.

The two likely causes of this are a defective starting component and a mechanically seized compressor.

To determine which you have:

Install high and low side gauges.

Try to start the compressor.

Watch the pressures closely.

If the pressures do not move, the compressor is seized. Replace the compressor.

If the pressures move, the compressor is turning slowly and is not seized. Check the capacitors and relay.

COMPRESSOR DRAWING HIGH AMPS The continuous amperage draw on start-up should not be

near the maximum fuse size indicated on the serial tag.

DIAGNOSING CAPACITORS

If the compressor attempts to start, or hums and trips the overload protector, check the starting components before replacing the compressor.

Visual evidence of capacitor failure can include a bulged terminal end or a ruptured membrane. Do not assume a capacitor is good if no visual evidence is present.

Use a capacitor tester when checking a suspect capacitor. Clip the bleed resistor off the capacitor terminals before testing.

If the compressor hums and will not start but the windings are OK. Replace the start capacitor.

A good test is to install a known good substitute capacitor.

48 Part Number 020007115 06/27/2019

Page 49

Section 7 Component Check Procedures

FILTERDRIERS

Function

To remove moister and particulates from the refrigerant. This will prevent premature failure of the compressor and blocking of restrictor devices.

Specification

The size of the filter-drier is important due to a critical refrigerant charge. Using an improperly sized filter- drier will cause the refrigeration system to be improperly charged with refrigerant.

Driers are covered as a warranty part. The drier must be replaced any time the system is opened for repairs. Refer to the parts manual for the recommended OEM field replacement drier.

Check Procedure

The drier should not alter the temperature of the refrigerant. Compare the temperature of the copper pipe either side of the filter/drier, they should be the same.

If there is a temperature drop that indicates a partial blockage of the filter/drier and it should be replaced.

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Page 50

Component Check Procedures Section 7

System Contamination Clean-Up

GENERAL

This section describes the basic requirements for restoring contaminated systems to reliable service.

Important

Multiplex assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company.

DETERMINING SEVERITY OF CONTAMINATION

System contamination is generally caused by either moisture or residue from compressor burnout entering the refrigeration system.

Inspection of the refrigerant usually provides the first indication of system contamination. Obvious moisture or an acrid odor in the refrigerant indicates contamination.

If either condition is found, or if contamination is suspected, use a Total Test Kit from Totaline or a similar diagnostic tool. These devices sample refrigerant, eliminating the need to take an oil sample. Follow the manufacturer’s directions.

If a refrigerant test kit indicates harmful levels of contamination, or if a test kit is not available, inspect the compressor oil.

1. Remove the refrigerant charge from the machine.

2. Remove the compressor from the system.

3. Check the odor and appearance of the oil.

4. Inspect open suction and discharge lines at the compressor for burnout deposits.

5. If no signs of contamination are present, perform an acid oil test.

Check the chart to determine the type of cleanup required.

Contamination Cleanup Chart

Symptoms/Findings Required Cleanup Procedure

No symptoms or suspicion of

contamination

Moisture/Air Contamination

symptoms

Refrigeration system open to

atmosphere for longer than

15 minutes

Refrigeration test kit and/

or acid oil test shows

contamination

No burnout deposits in open

compressor lines

Mild Compressor Burnout

symptoms

Oil appears clean but smells

acrid

Refrigeration test kit or acid oil

test shows harmful acid content

No burnout deposits in open

compressor lines

Severe Compressor Burnout

symptoms

Oil is discolored, acidic, and

smells acrid

Burnout deposits found in the

compressor, lines, and other

components

Normal evacuation/recharging

procedure

Mild contamination cleanup

procedure

Mild contamination cleanup

procedure

Severe contamination cleanup

procedure

50 Part Number 020007115 06/27/2019

Page 51

Section 7 Component Check Procedures

CLEANUP PROCEDURE

Mild System Contamination

1. Replace any failed components.

2. If the compressor is good, change the oil.

3. Replace the liquid line drier.

Important

Dry nitrogen is recommended for this procedure. This will prevent release of refrigerants.

4. Follow the normal evacuation procedure, except replace the evacuation step with the following:

A. Pull vacuum to 1000 microns. Break the vacuum

with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig (35 kPa,.35 bar).

B. Pull vacuum to 500 microns. Break the vacuum

with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig (35 kPa,.35 bar).

9. Follow the normal evacuation procedure, except replace the evacuation step with the following:

A. Pull vacuum to 1000 microns. Break the vacuum

with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig (35kPa,.35bar).

B. Change the vacuum pump oil.

C. Pull vacuum to 500 microns. Break the vacuum

with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig (35kPa,.35bar).

D. Change the vacuum pump oil.

E. Pull vacuum to 500 microns. Run the vacuum

pump for 1/2 hour on self-contained models, 1 hour on remotes.

NOTE: You may perform a standing vacuum test to make a preliminary leak check. You should use an electronic leak detector after system charging to be sure there are no leaks.

C. Change the vacuum pump oil.

D. Pull vacuum to 500 microns. Run the vacuum

pump for 1/2 hour on self-contained models, 1 hour on remotes.

NOTE: You may perform a standing vacuum test to make a preliminary leak check. You should use an electronic leak detector after system charging to be sure there are no leaks.

5. Charge the system with the proper refrigerant to the nameplate charge.

6. Operate the machine.

Severe System Contamination

1. Remove the refrigerant charge.

2. Remove the compressor and inspect the refrigeration lines. If burnout deposits are found.

3. Wipe away any burnout deposits from suction and discharge lines at compressor.

4. Sweep through the open system with dry nitrogen.

5. Install a new compressor and new start components.

6. Install a suction line filter-drier with acid and moisture removal capability. Place the filter drier as close to the compressor as possible.

7. Install an access valve at the inlet of the suction line drier.

8. Install a new liquid line drier.

10. Charge the system with the proper refrigerant to the nameplate charge.

11. Follow normal evacuation procedures.

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Page 52

Component Check Procedures Section 7

REPLACING PRESSURE CONTROLS

Without Removing Refrigerant Charge

Important

This is a required in-warranty repair procedure.

1. Disconnect power.

2. Follow all manufacturer’s instructions supplied with the pinch-off tool. Position the pinch-off tool around the tubing as far from the pressure control as feasible. Clamp down on the tubing until the pinch-off is complete.

Warning

Do not unsolder a defective component. Cut it out of the system. Do not remove the pinch-off tool until the new component is securely in place.

3. Cut the tubing of the defective component with a small tubing cutter.

4. Solder the replacement component in place. Allow the solder joint to cool.

5. Remove the pinch-off tool.

6. Re-round the tubing. Position the flattened tubing in the proper hole in the pinch-off tool. Tighten the wing nuts until the block is tight and the tubing is rounded.

NOTE: The pressure controls will operate normally once the tubing is re-rounded. Tubing may not re-round 100%.

USING PINCH-OFF TOOL

52 Part Number 020007115 06/27/2019

Page 53

Section 8 Charts

Section 8

Charts

Total System Refrigerant Charge

This information is for reference only.

Warning

Refrigerant type and amount varies by model. Machines may use R-404A or R-290 refrigerant. Always refer to model/serial plate to identify refrigerant type and amount.

Warning

Some 50 Hz models may contain up to 150 grams of R-290 (propane) refrigerant. R-290 (propane) is flammable in concentrations of air between approximately 2.1% and

9.5% by volume (LEL lower explosion limit and UEL upper explosion limit). An ignition source at a temperature higher than 470°C is needed for a combustion to occur. Refer to nameplate to identify the type of refrigerant in your equipment.

Important

Due to continuous improvements, this information is for reference only. Please refer to the serial number tag to verify electrical data. Serial tag information overrides information listed on this page.

Model Ty pe

ND21TS00 R404A 7.0 oz (198g)

Cabinet

(System 1)

Part Number 020007115 06/27/2019 53

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Charts Section 8

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54 Part Number 020007115 06/27/2019

Page 55

CONDENSER FAN MOTOR

COMPRESSOR

SP2

1/1

RT6

1/1

FS30

1/1

T45

1/1

T46

1/1

FS31

1/1

FS32

1/1

RT7

1/1

FS33

YALER TNERRUCROTICAPAC TRATS

1/1

FS47

1/1

T48

1/1

T49

1/1

FS48

SENSOR

TEMPERATURE

CONTROLLER

LINE

WIRING DIAGRAM

Section 9

Diagrams

6/6

Connector

Pump Moto

015

1/1

FS50

Push Button with Blue LED

BLUE

FS56

FS57

FS58

FS59

FT19

LED_SUPPLY

LED_RETURN

SWITCH_SUPPLY

SWITCH_RETURN

072

074

076

073

072

075

PROBE

1/1

FS12

FS13

012

008

J1-1

SENSOR_SUPPLY

011

HIGH_PROBE

1/6

SENSOR_RETURN

009

010

COMMON

LOW_PROBE

J1-2

2/6

J1-3

3/6

J1-4

4/6

J1-5

5/6

S & P INTERFACE

J1-6

6/6

J2-4

P12

MOLEX_22-01-2067

4/4

24VDC

DC_RETURN

T63

054

042

1/1 T2

1/1 T1

1/1

5 0

SP7

5 4 0

1/5

J3-1

2/5

J3-2

3/5

J3-3

4/5

J3-4

5/5

J3-5

P11

BOARD

MOLEX_22-01-2057

J2-1

J2-3

J2-2

P13

1/4

2/4

3/4

MOLEX_22-01-2047

10VAC

AC_RETURN

055

043

044

046

S13

1/2

2/2

MOLEX_39-01-2020

033

032

031

030

036

Diode

RETURN

D1CAT

038

D1ANO

035

1/1

FS22

1/1

FS23

1212

STILL TAP

FLOW SOLENOID

043

1/1

FS62

TRANSFORMER

SBX_120-10VAC_TRANS

1/1

FS64

Secondary a

10VAC 120VAC

MOLEX_39-01-2021

I-07 I-06 I-05

SENSOR_PROBE_SIGNAL

I-04

LOW_PROBE_SIGNAL

-DC24

HIGH_PROBE_SIGNAL

I-03

PROBE_COMMON

I-02 I-01 I-00

COM 0

-DC24

RETURN

+DC24

057 060

034

Diode

RETURN

2ANO

2CA D

1/1

FS20

1/1

FS21

NITRO TAP

FLOW SOLENOID

RETURN

1/1

FS63

Primary a

Primary b

FS65

1/1

Secondary b

RETURN

5/6

4/6

3/6

2/6

1/6

016

014

013

1/1

FS51

1/1

FT20

017

056

070

810 (35)

810 (35)810 (35)

810 (35)

PLC MICRO

PLC MICROPLC MICRO

PLC MICRO

810 (35)

810 (35)810 (35)

810 (35)

PLC MICRO

PLC MICROPLC MICRO

PLC MICRO

065

068

061

24VDC

SOLENOIDS

RETURN

S11

1/5

2/5

3/5

AMP_350810-1

1/5P62/5

3/5

052

050

AMP_350809-1

042

FH2

1/1

FH4

BUSSMANN_63K9349-B

FUSE

BUSSMANN_63K9349-B

1/1

FH1

1/1

FH3

BUSSMANN_63K9349-A

049

048

BUSSMANN_63K9349-A

24VDC

RETURN

1/6S52/6

3/6

1/1

3/3

FS49

LINE

GROUND

1/1 RT9

003

001

007

1/3P42/3

AMP_350766-1

1/3S72/3

5 2 0

AMP_350767-1

AMP_61795-1

RT10 1/1

1/1

FS61 1/1

FT23

AMP_2-520183-2

S12

MOLEX_39-01-2021

1(-)

5(+)

O-03

064

CM3 O-02

CM2 O-01

CM1 O-00

CM0

RETURN

4/5

5/5

4/5

5/5

039

RETURN

040

041

051

RETURN

4/6

5/6

6/6

SUPPLY

DC POWER

1/3

2/3

NEUTRAL

AMP_640250-3

002

005

1/3S83/3

2/3

3/3

1/3

3/3

AMP_350766-1

MOLEX_39-01-2020

1/2

RETURN

2/2

071

004

D-ANOD

1/1

Diode

D-CATH

059

067

062063

058

059

RT3

1/1

RT2

1/1

SP3

045

AMP_350767-1

3/3

2/3

NEUTRAL

006006

053

040

1/1

FS27

1/1

AMP_2-520128-2

FS53

1/1

FT26

AMP_3-521142-2

PRESSURE SW.

046

027

024

1/1

FS42

019

1/1

FS41

EVAPORATOR FAN

021018

020

1/1

FT27

AMP_3-521142-2

1/1

FS52

004

045

046

SP1

1/1

FS66

1/1

FS67

1/1

FT24

FT25

Part Number 020007115 06/27/2019 55

Page 56

Diagrams Section 9

PLUMBING DIAGRAM

NITROGEN

COFFEE

NITRO COFFEE

56 Part Number 020007115 06/27/2019

Page 57

Section 9 Diagrams

PROGRAMMABLE LOGIC CONTROLLER (PLC) STATE DIAGRAMS

Start Up

T <= t

boot

Not Pouring

POWER OFF Sytem Power ON

T > t

PS = NORMAL

Pour State

NI = FULL || DEC

&& !KE

boot

Software Boot

Pump == OFF

SVs == CLOSED

Pump == OFF

SVs == OPEN

T > t

PS = NORMAL

Keg Change

IDLE

boot

Not Pouring

TS = TN = CLOSED

&& !KE &&

PS = NORMAL

ANY

TS = OPEN

TN = CLOSED

Pouring Still

TS = CLOSED

TN = OPEN

NI = EMPTY || INC

TS = TN = OPEN

Pouring Both

Pouring Nitro

NI = FULL

NI Filling

Pump == ON

SVs == OPEN

Keg Empty

Pump == OFF

SVs == CLOSED

Keg Change

Part Number 020007115 06/27/2019 57

Page 58

Diagrams Section 9

Pouring Plain Chilled Coffee

Pour

NI = FULL || DEC

Pump == OFF

SVs == OPEN

TS = OPEN

TN = CLOSED

&& !KE &&

PS = NORMAL

ANY

TS = TN =CLOSED

Not Pouring

Pouring Nitrogenized Coffee

Pouring Still

TS = CLOSED

TN = OPEN

TS = TN = OPEN

Pouring Nitro

NI = FULL || DEC

NI = EMPTY || INC

Pouring Both

NI = FULL

NI Filling

Pump == ON

SVs == OPEN

Keg Empty

Pump == OFF

SVs == CLOSED

Pour

Pump == OFF

SVs == OPEN

Keg Change

TS = CLOSED

TN = OPEN

&& !KE &&

PS = NORMAL

ANY

TS = TN =CLOSED

Not Pouring

Pouring Nitro

TS = OPEN

TN = CLOSED

TS = TN = OPEN

Pouring Still

NI = EMPTY || INC

Pouring Both

NI = FULL

NI Filling

Pump == ON

SVs == OPEN

Keg Empty

Pump == OFF

SVs == CLOSED

Keg Change

58 Part Number 020007115 06/27/2019

Page 59

Section 9 Diagrams

Pouring Both

Pour

Pump == OFF

SVs == OPEN

NI = FULL

TS = TN = OPEN

&& !KE &&

PS = NORMAL

NI = FULL || DEC

Pouring Both

Cleaning Mode

ANY

Switch Hold >= t

!KE

PS = NORMAL

TS = TN =CLOSED

Not Pouring

Cleaning Mode

Switch Hold* >= t

TS = OPEN

TN = CLOSED

*From any

cleaning

state

TS = CLOSED

TN = OPEN

Pouring Still

NI = EMPTY || INC

Flood NI

LED == ON

Pump == ON

SVs == CLOSED

KE && T <= t

Pouring Nitro

T <= t

fni

NI Filling

Pump == ON

SVs == OPEN

Keg Empty

Pump == OFF

SVs == CLOSED

fni

T <= t

T > t

fni

Flush Taps

LED == ON

Pump == ON

SVs == OPEN

Keg Change

ANY

Keg Change

Keg Empty

LED == OFF

Pump == OFF

SVs == CLOSED

Switch Hold >= t

KE && T <= t

KE && T > t

pni

Purge NI

LED == ON

Pump == OFF

SVs == OPEN

pni

!KE

ERROR

LED == FAST BLINK

Pump == OFF

SVs == CLOSED

Run to Empty

Pump == ON

SVs == OPEN

LED == ON

KE && T<=t

KE&& T <= t

T > t

Pump == OFF

SVs == OPEN

T > t

Soak

LED == ON

T <= t

Part Number 020007115 06/27/2019 59

Page 60

Diagrams Section 9

Keg Change

Keg Empty

LED == OFF

Pump == OFF

SVs == CLOSED

LED Flash

LED == ON

Pump == ON

SVs == CLOSED

Switch Press

Disconnect Keg

New Keg Connected

LED == OFF

Pump == OFF

SVs == CLOSED

Keg Disconnected

LED == OFF

Pump == OFF

SVs == CLOSED

Connect Keg

PS = NORMAL

ANY

Keg Change

(tpd-tpl) <= T <= (tp-tpl)

&& KE

Pump Prime

LED == OFF

Pump == ON

SVs == CLOSED

T > t

Pump Monitor

Pour State

!KE

KE && T > t

Pump Motor == OFF

T <= t

prm

&& KE

Pour State

Prime FAIL

LED == FAST BLINK

Pump == OFF

SVs == CLOSED

Pump Motor == OFF

T <= t

prm

&& !KE

T <= t

Keg ChangeSwitch Hold >= t

prm

Pump Motor == ON

Pump MonitorANY Pump Motor == ON

T > t

prm

Pump Motor == ON

Pump Motor Timeout

LED == FAST BLINK

Pump == OFF

SVs == CLOSED

Keg Change

Switch Hold >= t

60 Part Number 020007115 06/27/2019

Page 61

Section 9 Diagrams

Timing Parameters

Designator

Value

Description

boot

15s

POR: Software Boot time

fni

60s

Cleaning Mode: NI Tank Flood time

tft60s

Cleaning Mode: Dispense Taps Fl ush time

ts60s

Cleaning Mode: Solution Soak time

pni

120s

Cleaning

Mode: NI Tank P urge time

tcp3s

Cleaning Mode Entry:

Switch Press & Hold

time

tap3

Cleaning Mode Abort:

Switch Press & Hold

time

tep3s

Error

Clear: Switch Press & Hold time

tpl1s

Keg Change: Pump

Prime LED flash time

tp20s

Keg Change: Pump

Prime time maximum

tpd7s

Keg Change: Fluid

Present Hold time

prm

300s

Maximum

allowed pump run time

Low Pressure

ANY PS = LOW

Pump == OFF

SVs == CLOSED

Timing Parameters

PS = NORMAL

&& !KE

Pour State

PS = NORMAL

Keg Change

Part Number 020007115 06/27/2019 61

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Diagrams Section 9

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62 Part Number 020007115 06/27/2019

Page 63

Page 64

MULTIPLEX

2100 FUTURE, SELLERSBURG, IN 47172

800-367-4233

WWW.MANITOWOCBEVERAGE.COM/US

Every new piece of Manitowoc Foodservice equipment comes with KitchenCare™ and you choose the level of service that meets your operational needs from one restaurant to multiple locations.

StarCare – Warranty & lifetime service, certied OEM parts, global parts inventory, performance audited

ExtraCare – CareCode, 24/7 Support, online/mobile product information

LifeCare – Install & equipment orientation, planned maintenance, KitchenConnect™, MenuConnect

Talk with KitchenCare™ • 1-844-724-CARE • www.mtwkitchencare.com

To learn how Manitowoc Foodservice and its leading brands can equip you, visit our global web site at www.manitowocfoodservice.com, then discover the regional or local resources available to you.

Part Number 020007115 06/27/2019

Manitowoc Multiplex N2Fusion Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual