Vollrath F431 User Manual

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Model F431

OWNER’S MANUAL

Manual No. 513604 Rev 4

Owner’s Manual

For F431

Cab Model Soft Serve Pressure Machine

This manual provides basic information about the machine. Instructions and suggestions are given covering its operation and care.

The illustrations and speciﬁ cations are not binding in detail. We reserve the right to make changes to the machine without notice, and without incurring any obligation to modify or provide new parts for machines built prior to date of change.

DO NOT ATTEMPT to operate the machine until instructions and safety precautions in this manual are read completely and are thoroughly understood. If problems develop or questions arise in connection with installation, operation, or servicing of the machine, contact the company at the following location:

STOELTING Ph: 800-558-5807 502 Hwy. 67 Kiel, WI 53042 Fax: 920-894-7029

A Few Words About Safety

Safety Information

Read and understand the entire manual before operating or maintaining Stoelting equipment.

This Owner’s Manual provides the operator with information for the safe operation and maintenance of Stoelting equipment. There are hazards associated with the operation of this machine. For this reason safety is emphasized throughout the manual. To highlight speciﬁ c safety information, the following safety deﬁ nitions are provided to assist the reader.

The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and their explanations, deserve your careful attention and understanding. The safety warnings do not by themselves eliminate any danger. The instructions or warnings they give are not substitutes for proper accident prevention measures.

If you need to replace a part, use genuine Stoelting parts with the correct part number or an equivalent part. We strongly recommend that you do not use replacement parts of inferior quality.

Safety Alert Symbol:

This symbol Indicates danger, warning or caution. Attention is required in order to avoid serious personal injury. The message that follows the symbol contains important information about safety.

Signal Word:

Signal words are distinctive words used throughout

this manual that alert the reader to the existence and relative degree of a hazard.

WARNING

The signal word “WARNING” indicates a potentially hazardous situation, which, if not avoided, may result in death or serious injury and equipment/property damage.

CAUTION

The signal word “CAUTION” indicates a potentially

hazardous situation, which, if not avoided, may result in minor or moderate injury and equipment/property damage.

CAUTION

The signal word “CAUTION” not preceded by the safety alert symbol indicates a potentially hazardous situation, which, if not avoided, may result in equipment/property damage.

NOTICE

The signal word “NOTICE” indicates information or procedures that relate directly or indirectly to the safety or personnel or equipment/property.

TABLE OF

CONTENTS

Section Description Page Section 1 Introduction

1.1 Description ..................................................................................................1

1.2 Speciﬁ cations .............................................................................................2

Section 2 Installation Instructions

2.1 Safety Precautions .....................................................................................3

2.2 Shipment & Transit .....................................................................................4

2.3 Machine Installation ....................................................................................4

2.4 Installing Permanent Wiring ........................................................................4

2.5 Mix Pump ....................................................................................................5

Section 3 Initial Set-Up and Operation

3.1 Safety Precautions .....................................................................................9

3.2 Operating Controls and Indicators ..............................................................9

3.3 Important Cleaning and Sanitizing Information ...........................................11

3.4 Disassembly of Machine Parts ...................................................................12

3.5 Cleaning Disassembled Parts ....................................................................13

3.6 Sanitizing Machine Parts ............................................................................14

3.7 Cleaning the Machine .................................................................................14

3.8 Assembling the Machine ............................................................................14

3.9 Sanitizing Assembled Machine ...................................................................15

3.10 Initial Freeze Down and Operation .............................................................16

3.11 Normal Freeze Down and Operation ..........................................................18

3.12 Mix Information ...........................................................................................18

3.13 Operation of Mix Pump ...............................................................................19

3.14 Mix Pump Cleaning ....................................................................................19

3.15 Disassembly and Inspection of Removable Parts ......................................19

Section Description Page Section 4 Maintenance and Adjustments

4.1 Machine Adjustment ...................................................................................21

4.2 Product Consistency Adjustment ................................................................21

4.3 Locking Out Control Panel ..........................................................................21

4.4 Obtaining Readings and Modifying Settings (Service Personnel Only) ......21

4.5 Readings (Service Personnel Only) ...........................................................22

4.6 Adjustments (Service Personnel Only) .......................................................23

4.7 Other Settings (Service Personnel Only) ....................................................23

4.8 Overrun Adjustment ....................................................................................24

4.9 Mix Pump Hose Reposition ........................................................................25

4.10 Mix Pump Hose Replacement ....................................................................25

4.11 Cab Temperature Adjustment ..................................................................... 26

4.12 Drive Belt Tension Adjustment ....................................................................26

4.13 Condenser Cleaning (Air Cooled Machines) ..............................................27

4.14 Preventative Maintenance ..........................................................................27

4.15 Extended Storage .......................................................................................27

Section 5 Troubleshooting

5.1 Error Codes ................................................................................................29

5.2 Troubleshooting - Error Codes ...................................................................29

5.3 Troubleshooting - Machine .........................................................................31

5.4 Troubleshooting - Mix Pump .......................................................................32

Section 6 Replacement Parts

6.1 Decals and Miscellaneous Parts ................................................................35

6.2 Front Door and Auger Parts ........................................................................36

6.3 Cab Tubing Assembly .................................................................................37

SECTION 1

INTRODUCTION

1.1 DESCRIPTION

The Stoelting F431 ﬂ oor model machine is pressure fed. The machine is equipped with fully automatic controls to provide a uniform product. The machine is designed to operate with almost any type of commercial soft-serve or non-dairy mixes available, including ice milk, ice cream, yogurt, and frozen dietary desserts.

This manual is designed to assist qualiﬁ ed personnel and operators in the installation, operation and maintenance of the Stoelting Model F431 pressure machine.

Figure 1-1 Model F431 Machine

Figure 1-2 Machine Speciﬁ cations

1.2 SPECIFICATIONS

Model F431

Dimensions Machine with crate

width 19-1/8’’ (48,6 cm) 27’’ (68,6 cm)

height 67-7/8’’ (172,4 cm) 78’’ (198,1 cm)

depth 37-3/4’’ (95,9 cm) 48’’ (121,9 cm)

Weight 500 lbs (226,7 kg) 650 lbs (294,8 kg)

Electrical 1 Phase, 208-240 VAC, 60Hz

circuit ampacity

overcurrent protection

device

International Option 1 Phase, 220-240 VAC, 50Hz

Compressor 11,000 Btu/hr Scroll™ Compressor

Drive Motor Two - 3/4 hp

Air Flow Air cooled units require 3” (7,6 cm) air space on both sides, 6” back.

Plumbing Fittings Water cooled units require 1/2” N.P.T. water and drain ﬁ ttings.

Hopper Volume Two - 5.5 gallons (20,82 liters)

Freezing Cylinder

Volume

Two - 0.85 gallon (3,22 liters)

24A minimum

30A maximum

SECTION 2

INSTALLATION INSTRUCTIONS

2.1 SAFETY PRECAUTIONS

Do not attempt to operate the machine until the safety precautions and operating instructions in the manual are read completely and are thoroughly understood.

Take notice of all warning labels on the machine (see Figure 2-1). The labels have been put there to help you maintain a safe working environment. The labels have been designed to withstand washing and cleaning. All labels must remain legible for the life of the machine. Labels should be checked periodically to be sure they have not been painted over, rubbed off, fallen off, and can be recognized as warning labels.

If you are in need of replacement labels, indicate the part number, type of label, location of label, and quantity required along with your name and address and mail to:

Stoelting, LLC

Commercial Products

502 Hwy. 67

Kiel, WI 53042

2.2 SHIPMENT AND TRANSIT

The machine has been assembled, operated, and inspected at the factory . Upon arrival at the ﬁ nal destination, the machine must be checked for any damage which may have occurred during ﬁ nal transit.

Figure 2-1 Warning Label Locations

With the method of packaging used, the equipment should arrive in excellent condition. THE CARRIER IS RESPONSIBLE FOR ALL DAMAGE IN TRANSIT, WHETHER VISIBLE OR CONCEALED. Do not pay the freight bill until the machine has been checked for damage. Have the carrier note any visible damage on the freight bill. If concealed damage and/or shortage is found later advise the carrier within ten days and request inspection. The customer must place claim for damage and/or shortages in shipment with the carrier. Stoelting, LLC cannot make any claims against the carrier.

2.3 MACHINE INSTALLATION

Installation of the machine involves moving the machine close to its permanent location, removing all crating, setting in place, assembling parts, and cleaning.

A. Uncrate the machine.

WARNING

Installation must be performed by a qualiﬁ ed elec- trician/refrigeration specialist. Incorrect installation may cause personal injury, severe damage to the machine and will void factory warranties.

B. Install the four casters. Turn the threaded end into

the machine until zero threads are showing. To level, turn out casters no more than 1/4" maximum, then tighten all jam nuts.

C. The machine must be placed in a solid level

position.

NOTE

Accurate leveling is necessary for correct drainage of machine barrel and to insure correct overrun.

If permanent wiring is required by local codes, the following procedure must be performed:

A. Refer to the nameplate on the side panel of the

machine for speciﬁ c electrical requirements. Make sure the power source in the building matches the nameplate requirements.

WARNING

Hazardous voltage

High voltage will shock, burn or cause death. Turn off and lock out main power disconnect before installing wiring. Do not operate machine with cabinet panels removed.

B. Remove the back panel and the junction box

cover located at the bottom of the machine. C. Install permanent wiring according to local code. D. Check the auger shaft rotation by placing the Main

Freezer Power Switch in the ON position, placing

both Freezing Cylinder OFF/ON switches in the

ON position and pressing the CLEAN button on

each of the control panels. Auger shaft rotation

is clockwise as viewed through the clear plastic

front door (see Figure 2-2). E. Press the CLEAN button to stop the augers.

2.5 MIX PUMP

A. MIX PUMP HOSE INSTALLATION

Follow the steps below to install the mix pump hose in the cabinet part of the machine.

D. Machines with air cooled condensers require a

minimum of 3" (7,5cm) of space on all sides and 10" (25cm) at the top for proper circulation. A minimum of 6" (15cm) side clearance is required in high ambient conditions (>98ºF).

E. Soft serve machines with water cooled condensers

require 1/2" NPT supply and drain ﬁ ttings.

2.4 INSTALLING PERMANENT WIRING

CAUTION

Risk of product damage

Air cooled condenser requires proper ventilation. Failure to provide adequate ventilation will void factory warranties.

Figure 2-2 Auger Rotation

6" (15cm)

Figure 2-3 Mix Hose Installation

1. Turn pump on.

2. Feed one end of mix pump hose into the entering or pickup hose side (left) of black cover.

NOTE

Feed the tube into the clamp so the natural curve of the tube is towards the outside of the black cover. This prevents the hose from looping around the black cover twice.

3. Gently push the hose into the black cover until it begins to feed.

4. Allow the hose to feed itself through the pump until 6" (15cm) remains on the entering side.

5. Turn pump off.

6. Connect mix pump hose to the elbow ﬁ tting (located on the left side of the mix line manifold) using small hose clamp. Be careful not to twist the mix hose.

7. Turn pump on.

8. Allow remaining 6" (15cm) of tubing to feed through pump until hose adapter prevents further feeding.

9. Turn pump off.

10. Connect free end of mix pump hose to 3-way Tee as shown in Figure 2-4. When all connections are complete the 3- way Tee must be lower than the black pump housing.

CAUTION

Risk of product damage

Air/mix Tee must remain below the black cover/ clamp. If Tee is above the pump, mix will drain to the air compressor resulting in pump damage.

B. MIX PICKUP HOSE INSTALLATION

The F431 machine may be connected to standard mix containers or prepacked mix bags. One, 5 gallon mix bag may be connected to each freezing cylinder or two 2-1/2 gallon bags may be connected on each side. Follow the instructions below that match your conﬁ guration.

When Using One Mix Container Per Side:

1. Connect a 2" (5cm) length of 3/8" (9,5mm) ID plastic food grade tubing to the mix pickup assembly. Secure with hose clamps. Then place assembly through hole in cover and install retaining clip (see Figure 2-4 and 2-5).

2. Connect the free end of tubing to the mix check valve. Observe direction of check valve ﬂ ow arrow. Secure with hose clamp. Connect 24" (61cm) length of 3/8" (9,5mm) ID plastic food grade tubing to free end of check valve and secure with hose clamp.

Figure 2-4 Mix Pump Connections for Standard Mix Container

3. Connect elbow ﬁ tting to free end of tubing. Connect opposite end of elbow to 1/4" ID tan tubing on the left side of pump head. Secure with hose clamps (see Figure 2-3 and 2-4).

When Using Bag Connection System (BCS) with T wo Bags Per Side (optional kit #2183189):

1. Connect 3/8" (9,5mm) ID plastic food grade tubing to a bag adapter. Secure with hose clamps. This bag adapter will connect to the bag nearest the front of the machine.

2. Slide the hose clip over free end of 3/8" (9,5mm) ID plastic food grade tubing. Attach free end of tubing to a manifold adapter. Secure with large hose clamp or equivalent. Push the manifold adapter into the left port of the mix inlet manifold and secure with retaining clip. (See Figure 2-7).

3. Connect 3/8" (9,5mm) ID plastic food grade tubing to a bag adapter. Secure with hose clamps. This bag adapter will connect to the bag nearest the back of the machine.

Figure 2-5 Connecting Mix Pick-up Assembly

3-way Tee



Low Mix

Indicator

Adjustment

 

Knobs

Figure 2-6 Connecting Pump Hose to BCS Manifold

Figure 2-7 Completed BCS Hose Assembly

4. Attach free end of tubing to a manifold adapter. Secure with large hose clamp or equivalent. Push the manifold adapter into the right port of the mix inlet manifold and secure with retaining clip. (See Figure 2-7).

5. Place two mix bags into each mix container as shown in Figure 2-8 (left mix container shows two bag conﬁ guration).

6. Connect the bag adapter attached to the left side of the manifold to the mix bag in the front of the mix container (nearest the cabinet door). Connect the bag adapter attached to the right side of the manifold to the mix bag in the back of the mix container (see Figure 2-8).

When Using Bag Connection System (BCS) with One Bag Per Side (optional kit):

1. Connect 3/8"(9,5mm) ID plastic food grade tubing to a bag adapter. Secure with hose clamps.

2. Connect free end of 3/8" (9,5mm) ID plastic food grade tubing to mix check valve. Observe direction of check valve ﬂ ow arrow. Secure with hose clamp. Connect 3/8" (9,5mm) ID plastic food grade tubing to free end of check valve and secure with hose clamp.

3. Connect elbow ﬁ tting to free end of tubing. Connect opposite end of elbow to 1/4" ID tan tubing on the left side of pump head. Secure with hose clamps (see Figure 2-3 and 2-4).

4. Place one mix bag into each mix container as shown in Figure 2-8 (right mix container shows one bag conﬁ guration).

5. Connect the bag adapter to the mix bag. (See Figure 2-8).

Figure 2-8 Connecting BCS Mix Bags (two bag

connection on left, one bag connection on right)

When Using Two Mix Containers or Bag Connection Systems (BCS) on one Side (optional kit #2183189):

1. The F431 can be conﬁ gured to operate with only one freezing cylinder turned on. This may be done if only one ﬂ avor is being dispensed during slow times. In this case, running only one freezing cylinder will help minimize product breakdown, while reducing mix container ﬁ lling or mix bag replacement.

2. Connect two mix containers or two mix bags as described above, but connect both containers to the mix line manifold of the freezing cylinder you will be using.

C. MIX LOW LEVEL INDICATOR ADJUSTMENT

The sensitivity of the “Mix Low” indication that displays on the control panel can be adjusted to operator preference. If more advanced notice of low mix is required, simply loosen the black adjustment knobs located on the sensor brackets at the back of the machine cabinet, and slide the bracket upwards. If the “Mix Low” message appears while there is still sufﬁ cient mix in the container, slide the bracket down- ward. Be sure to tighten the adjustment knobs after properly positioning the sensor (see Figure 2-6).

SECTION 3

INITIAL SET-UP AND OPERATION

3.1 SAFETY PRECAUTIONS

SAFE OPERATION IS NO ACCIDENT; observe these rules:

A. Know the machine. Read and understand the

operating instructions.

B. Notice all warning labels on the machine. C. Wear proper clothing. Avoid loose ﬁ tting garments,

and remove watches, rings or jewelry which could cause a serious accident.

D. Maintain a clean work area. Avoid accidents by

cleaning the area and keeping it clean.

E. Stay alert at all times. Know which switch, push

button or control you are about to use and what effect it is going to have.

F. Disconnect electrical power for maintenance.

Never attempt to repair or perform maintenance on the machine until the main electrical power has been disconnected.

G. Do not operate under unsafe operating conditions.

Never operate this machine if unusual or excessive noise or vibration occurs.

3.2 OPERATING CONTROLS AND INDICATORS

Before operating the machine, it is required that the operator know the function of each operating control. Refer to Figure 3-1 for the location of the operating controls on the machine. For the information regarding error codes displayed on the control panel, refer to the troubleshooting section of this manual.

WARNING

Hazardous voltage

The Main Freezer Power switch must be placed in the OFF position when disassembling for cleaning or servicing. The machine must be disconnected from electrical supply before removing any access panel. Failure to disconnect power before servicing could result in death or serious injury.

Left Freezing Cylinder

OFF/ON Switch

PUSH TO

FREEZE

CLEAN

Main Freezer Power

Right Freezing Cylinder

OFF/ON Switch

Cab Off

Indicator Light

Figure 3-1 Controls

A. Main Freezer Power Switch

The Main Freezer Power switch is a two position rocker switch that supplies power to the IntelliT ec control, freezing cylinder circuits and lower cabinet refrigeration system. When the switch is placed in the ON position, the lower cabinet refrigeration system will run until the preset temperature is reached; then cycle ON and OFF to maintain that temperature. Power to individual freezing cylinders can then be controlled with the Freezing Cylinder OFF/ ON switches.

B. Freezing Cylinder OFF/ON Switch

The Freezing Cylinder OFF/ON switches are two position toggle switches used to supply power to the left or right freezing cylinder control circuit. When the switch is in the OFF position, the refrigeration system and auger will not operate. When the switch is in the ON position, the machine will be operational.

C. Spigot Switch

The spigot switch is mounted to the spigot cam assembly behind the header panel. When the spigot is opened to dispense product, the spigot switch opens and the "Serve Mode" begins.

D. Cab Off Indicator Light

A ﬂ ashing light indicates the Main Freezer Power Switch is in the OFF position; no refrigeration is being supplied to the cab. Place the Main Freezer Power switch in the ON position for cab refrigeration.

E. Pump Switch

The pump motor switches are the two rocker switches located in the upper left-hand side of the refrigerated cab. When a switch is placed in the OFF position, the pump will not run. When the switch is placed in the ON position, the pump will run until the preset pressure is reached, then cycle on and off as product is drawn to maintain that pressure.

F. Push To Freeze Button

The PUSH TO FREEZE button is a membrane or “snap” switch used to initiate "Serve Mode".

NOTE

After the PUSH TO FREEZE button is pressed, the drive motor starts. After a 3-second delay, the compressor will start.

H. Clean Button

The CLEAN button is a membrane, or “snap” switch. When the button is pressed, the freezing cycle stops and the drive motor will start. A CLEAN message will display on the LCD screen along with a 5-minute countdown timer. If the button is pressed again, the timer will reset. To exit the CLEAN mode, turn the Freezing Cylinder OFF/ ON switch to the OFF position. If the machine is left in CLEAN for more than 20 minutes, an error code (E4) will be displayed on the display panel. Place the Freezing Cylinder OFF/ON switch in the OFF position and back in the ON position to clear this error.

I. Mix Low Light Indicator

A MIX LOW message will appear on the LCD display to alert the operator of a low mix condition. The message will display when there is approximately one gallon of mix left in the mix container or when one bag of the Bag Connection System (BCS) is empty . When the MIX LOW message is displayed, reﬁ ll container or replace bag immediately.

J. Dispense Rate Adjusters

The dispense rate adjuster limits the opening of the spigot. To adjust product dispense rate, turn the adjusting knob clockwise for slower ﬂ ow and counterclockwise for faster ﬂ ow. It takes at least ﬁ ve complete turns of the adjusting knob to make a noticeable difference in the dispense rate.

K. High Head Pressure Cutout

If the head pressure exceeds 445 psig (28 bar), the high head pressure cutout will trip. It will automatically reset after about 10-15 minutes.

L. Front Door Safety Switch

The front door safety switch prevents the auger from turning when the front door is removed. The switch is open when the door is removed and closed when the door is properly installed.

M. Menu Navigation Buttons

The Menu Navigation Buttons allow the user to display information regarding the machine’s status of operation as well as adjust product consistency (Fig. 3-2).

G. LEDs

The membrane switch (touchpad) features two lights; a green LED and an amber LED. The green LED is lit during "Serve Mode". During freeze down, it is not lit. When product consistency approaches 75% in the freezing cylinder, the green LED ﬂ ashes. The amber LED is on during all other modes. In the event of an error or when the freezing cylinder is off, both LEDs alternatively ﬂ ash.

Figure 3-2 IntelliTec Control

Selection Button (SEL) The SEL button is used

in combination with the up arrow to enter into the settings of the IntelliTec control. This button is also used to navigate through the control settings menu.

Set Button (SET) During normal operation the

SET button is used to save a change made to the product consistency setting. It is also used to save changes when modifying control settings.

Left Arrow Button () During normal operation, if

the left arrow button is pressed for 5 seconds, the display will remain lit. To turn the light off, press the left arrow button for 5 seconds. The left arrow button is used primarily to navigate through the control settings.

Up Arrow Button () Under normal operation,

after pressing the SET button, the up arrow button will change the value of the product consistency setting. This button is used primarily to navigate through the control settings.

3.3 IMPORTANT INFORMATION REGARDING

CLEANING AND SANITIZING

Soft serve and shake machines require special consideration when it comes to food safety and proper cleaning and sanitizing.

The following information speciﬁ cally covers issues for cleaning and sanitizing frozen dessert machines. This information is meant to supplement a comprehensive food safety program.

Soil Materials Associated with Frozen Dessert Machines MILKFAT/BUTTERFAT – As components of ice-cream/

frozen custard mix, these soils will accumulate on the interior surfaces of the machine and its parts. Fats are difﬁ cult to remove and help attribute to milkstone buildup.

MILKSTONE – Is a white/gray ﬁ lm that forms on equip- ment and utensils that come in contact with dairy products. These ﬁ lms will accumulate slowly on surfaces because of ineffective cleaning, use of hard water , or both. Milkstone is usually a porous deposit, which will harbor microbial contaminants and eventually defy sanitizing efforts.

Once milkstone has formed, it is very difﬁ cult to remove. Without using the correct product and procedure, it is nearly impossible to remove a thick layer of milkstone.

(NOTE: general-purpose cleaners DO NOT remove milkstone.) This can lead to high bacteria counts and a food safety dilemma.

IT IS BEST T O CONTROL MILKSTONE ON A DAIL Y BASIS BEFORE IT CAN BECOME A SIGNIFICANT FOOD SAFETY PROBLEM.

In addition to food safety , milkstone can cause premature wear to machine parts which can add to costs for replacement parts or possibly more expensive repairs if worn machine parts are not replaced once they have become excessively worn.

Important Differences Between Cleaning and Sanitizing CLEANING vs. SANITIZING It is important to distinguish between cleaning and sanitiz-

ing. Although these terms may sound synonymous, they are not. BOTH are required for adequate food safety and proper machine maintenance.

CLEANING

· Is the removal of soil materials from a surface.

· Is a prerequisite for effective sanitizing.

NOTE

An UNCLEAN surface will harbor bacteria that can defy sanitizing efforts.

Bacteria can develop and resist sanitizing efforts within a layer of soil material (milkstone). Thorough cleaning procedures that involve milkstone removal are critical for operators of frozen dessert machines.

SANITIZING

· Kills bacteria.

· Can be effective on clean surfaces only.

NOTE

Using a SANITIZER on an unclean surface will not guarantee a clean and safe frozen dessert machine.

Proper Daily Maintenance: The Only Way to Assure Food Safety and Product Quality Proper daily maintenance can involve a wide variety

of products and procedures. Overall, the products and procedures fall into three separate categories. (Please note that this is a brief overview intended for informational purposes only.)

1. CLEANING – This involves draining mix from the machine barrel and rinsing the machine with water. Next, a cleaner is run through the machine. Then, the machine is disassembled and removable parts are taken to the sink for cleaning.

2. MILKSTONE REMOVAL – Since almost all cleaners do not have the ability to remove milkstone, the use of a delimer becomes necessary. Although this procedure may not be needed on a daily basis, it will usually follow the cleaning procedure. It requires letting a delimer solution soak in the machine for an extended period of time. Individual parts are also soaked in a deliming solution for an extended period of time (more about delimers in Additional Information).

3. SANITIZING – After the machine has been cleaned and contains no milkstone, the machine is reassembled. Then a FDA-approved sanitizing solution is run through the machine to kill bacteria. The machine is then ready for food preparation.

As a recommended cleaner and sanitizer for your frozen dessert machine, STERA-SHEEN has proven to be one of the best daily maintenance products for:

· CLEANING – Thorough removal of all solids including butterfat and milk fat.

· MILKSTONE REMOVAL – Complete removal of milkstone.

· SANITIZING – FDA-approved no rinse sanitizer for food contact surfaces.

Additional Information THE USE OF DELIMERS A delimer is a strong acid that has the ability to dissolve

milkstone. This type of chemical may become necessary once high levels of milkstone have developed. While these products are very effective for removing HIGH levels of milkstone, they are not ideal for two reasons:

1. PRODUCT SAFETY – Strong acids are dangerous chemicals. Carefully follow safety instructions provided with delimer products.

2. MACHINE DAMAGE – Strong acids will attack metal and rubber causing premature wear of parts. The use of a delimer needs to be closely monitored to avoid damage to machine surfaces and parts.

With proper daily use of STERA-SHEEN or it’s equivalent, there is no need for the use of a DELIMER.

DO NOT USE BLEACH

· BLEACH HAS ABSOLUTELY NO CLEANING PROPERTIES.

· BLEACH IS CORROSIVE. It can and will damage components of the machine causing premature wear and metal corrosion.

GENERAL PURPOSE CLEANERS General purpose cleaners do not have the ability to re-

move milkstone. Milkstone will become a problem if not remedied with additional products and procedures.

THE USE OF CHLORINE TEST STRIPS “Test strips” are used to determine concentrations of

active chlorine in sanitizing solutions. To use the strips, tear off a small portion and submerge it into the sanitizing solution. Then, compare the color change to the color key on the side of the test strip dispenser to determine the approximate chlorine concentration.

The ideal concentration of chlorine needs to be 100 ppm (as stated by the FDA).

NOTE

Follow the directions on the container for proper concentration.

There are two main factors that contribute to falling chlorine concentrations in a sanitizing solution.

1. PRODUCT USE – As the chlorine in the solution is being used, chlorine concentrations fall.

2. TIME – As time passes, small amounts of chlorine “evaporate” from the solution. (That is why you can smell it.)

Sanitizing solutions should not be allowed to fall below 100 ppm chlorine. New solutions should be mixed once old solutions become ineffective.

3.4 DISASSEMBLY OF MACHINE PARTS

Before using the machine for the ﬁ rst time, complete machine disassembly, cleaning and sanitizing procedures will need to be followed. Routine cleaning intervals and procedures must comply with the local and state health codes. Inspection for worn or broken parts should be made at every disassembly of the machine. All worn or broken parts should be replaced to ensure safety to both the operator and the customer and to maintain good machine performance and a quality product. A normal wear part is the auger ﬂ ight (see Figure 3-3). Auger ﬂ ights need to be replaced before the wear line is no longer visible.

T o disassemble the machine, refer to the following steps:

A. Disassembly Of Front Door

1. Remove the front door by turning off the circular knobs and then pulling the front door off the studs.

2. Remove the air bleed valve by unscrewing the knob while holding the valve stem from behind (Fig. 3-4). Remove the compression spring and push air bleed valve through the rear of the front door.

Wear Line



WARNING

Moving machinery can grab, mangle and dismember. Place the Main Freezer Power OFF/ON switch in the OFF position before disassembling for cleaning or servicing. Placing the Main Freezer Power OFF/ON switch in the ON position during cleaning or servicing may result in serious personal injury.

Figure 3-3 Auger Flight Wear

3. Remove the spigots through the bottom of the front door. Remove all o-rings from spigots and air bleed valve.

B. Disassembly Of Auger

1. Remove the front auger support by pulling it straight out of the machine barrel.

2. Remove the plastic bearing from the front auger support.

Valve Stem

Air Bleed

Valve

3.5 CLEANING DISASSEMBLED PARTS

Disassembled machine parts require complete cleaning, sanitizing and air drying before assembling. Local and state health codes will dictate the procedure required. Some state health codes require a four sink process (pre-wash, wash, rinse, sanitize, air dry), while others require a three sink process (without the pre-wash step). The following procedures are a general guideline only. Consult your local and state health codes for procedures required in your location.

Remove O-Ring

From Inside Insert

Figure 3-6 Rear Seal Removal

Figure 3-4 Front Door Disassembly

3. Remove the auger by pulling slowly and rotating out of the machine barrel. As the auger is withdrawn, remove each plastic ﬂ ight and spring from the auger (Fig. 3-5). Be careful not to scratch inside of machine barrel when removing ﬂ ights or auger. Remove the spring from each auger ﬂ ight.

4. Keep the rear of the auger tipped up once it is clear of the machine barrel.

5. Wipe spline lubricant off of the hex end of auger with a paper towel. Remove the rear seal assembly (Fig. 3-6).

A. To clean the machine parts disassemble all

parts. (Refer to Section 3.4 for the disassembly of machine parts.)

B. Place all front door and auger parts in clean 90° to

1 10°F (32°C to 43°C) water and wash thoroughly (four sink procedure only).

C. Place all parts in 90° to 110°F (32°C to 43°C) ,

mild detergent water and wash thoroughly.

D. Rinse all parts with clean 90° to 110°F (32°C to

43°C) water.

F. Sanitize all machine parts following procedures

outlined below.

3.6 SANITIZING MACHINE PARTS

A. Use a sanitizer mixed according to manufacturer’s

instructions to provide a 100 parts per million strength solution. Mix sanitizer in quantities of no less than 2 gallons of 90° to 1 10°F (32°C to 43°C) water. Allow the sanitizer to contact the surfaces to be sanitized for 5 minutes. Any sanitizer must be used only in accordance with the manufacturer’s instructions.

B. Place all parts in the sanitizing solution for 5

minutes, then remove and let air dry completely before assembling in machine.

Figure 3-5 Auger Flight Removal

3.7 CLEANING THE MACHINE

The exterior should be kept clean at all times to preserve the lustre of the stainless steel. A high grade of stainless steel has been used on the machine to ease cleanup. To remove spilled or dried mix, simply wash the exterior with 90° to 110°F (32°C to 43°C), soapy water and wipe dry.

Do not use highly abrasive materials as they will mar the ﬁ nish. A mild alkaline cleaner is recommended. Use a soft cloth or sponge to apply the cleaner. For best results, wipe in the direction of the grain of the steel.

A. Clean the rear seal surface from inside of the

machine barrel.

B. Using this sanitizing solution and the large barrel

brush provided, sanitize the barrel by dipping the

CAUTION

Risk of Product Damage

Do no use acid cleaners, strong caustic compounds or abrasive materials to clean any part of the frezer exterior or plastic parts.

Petrol-Gel

Spline

Lubricant

Figure 3-7 Rear Seal Lubrication

D. Lubricate the hex drive end of auger with a small

amount of spline lubricant. A small container of the lubricant is shipped with the machine.

E. Screw the springs onto the studs in plastic ﬂ ights.

Spring must be screwed into the ﬂ ights completely to provide proper tension (see Figure 3-8).

F . Install the two plastic ﬂ ights onto rear of the auger

and insert part way into machine barrel.

Place O-Ring

Inside Insert

brush in the sanitizing solution and brushing the inside of the barrel.

C. Remove the rear drip tray by pulling from side

panel. Clean and replace drip tray.

3.8 ASSEMBLING MACHINE

T o assemble the machine parts, refer to the following steps:

NOTICE

Petrol-Gel sanitary lubricant or equivalent must be used when lubrication of machine parts is speciﬁ ed.

NOTICE

The United States Department of Agriculture and the Food and Drug Administration require that lubricants used on food processing equipment be certiﬁ ed for this use. Use Lubricants only in accor- dance with the manufacturer’s instructions.

A. Assemble all o-rings onto parts dry, without

lubrication. Then apply a thin ﬁ lm of sanitary lubrication to exposed surfaces of the o-rings.

B. Lubricate rear seal area on auger shaft with a

thin layer of sanitary lubricant. Install the rear seal o-ring. Lubricate outside of rear seal o-ring with sanitary lubricant.

C. Install the stainless steel rear seal adapter into the

rear seal dry (without lubricant). Lubricate the inside surface of the rear seal adapter, including the adapter o-ring, and install it onto the auger shaft. DO NOT lubricate the outside of the rear seal adapter (see Figure 3-7).

Figure 3-8 Spring Installation

G. Install the remaining plastic ﬂ ights, push the auger

into the machine barrel and rotate slowly until the auger engages the drive shaft.

H. Apply a thin ﬁ lm of sanitary lubricant to the inside

and outside of the front auger support bearing, then place on the front of the auger. Assemble the front auger support onto the auger bearing.

NOTE

Position the front support on auger so legs do not interfere with the pin on the back of the front door assembly. Front door must push auger in slightly when it is being tightened to prevent the rear seal from leaking.

Figure 3-9 Front Door Assembly

When sanitizing the machine, refer to local sanitary regulations for applicable codes and recommended sanitizing products and procedures. The frequency of sanitizing must comply with local health regulations. Mix sanitizer according to manufacturer’s instructions to provide a 100 parts per million strength solution. Mix sanitizer in quantities of no less than 2 gallons of 90°F to 110°F (32°C to

CAUTION

Risk of Product Damage

Avoid prolonged contact of sanitizer with machine parts. Prolonged contact of sanitizer with machine may cause corrosion of stainless steel parts.

I. Install the spigots through the bottom of the front

door (see Figure 3-9).

J. Assemble the air bleed valve o-ring onto the air

bleed valves. Position the o-ring in groove close to the wide part. Apply a thin ﬁ lm of sanitary lubricant to the o-rings.

K. Insert the air bleed valves from the back of the

front door. Install compression springs onto air bleed valves then screw knobs on ﬁ nger tight.

L. Apply a thin ﬁ lm of sanitary lubricant to the door

seal o-rings, and ﬁ t into the grooves on the rear of the front door.

M. Place the front door assembly on the mounting

studs and push front door against the machine carefully.

N. Secure front door assembly by placing the knobs

on the studs and alternately tighten opposite corners until ﬁ nger tight only . Do not overtighten. Proper o-ring seal can be observed through the transparent front door.

3.9 SANITIZING

Sanitizing must be done after the machine is clean and just before the machine is ﬁ lled with mix. Sanitizing the night before is not effective. However , you should always clean the machine and parts after using it.

43°C) water. Allow sanitizer to contact the surfaces to be sanitized for 5 minutes. Any sanitizer must be used only in accordance with the manufacturer’s instructions.

A. Prepare 3 gallons of sanitizing solution following

manufacturer’s instructions. Pour into clean container and place container into the cabinet.

B. Place the mix pump switch in the ON position and

open air bleed valve on the front door by pushing valve in and holding (see Figure 3-10).

C. Let sanitizing solution ﬁ ll the machine barrel to

air bleed valve, then close the valve by pulling out to lock in place.

Air Bleed Valves

WARNING

The United States Department of Agriculture and the Food and Drug Administration require that all cleaning and sanitizing solutions used with food processing equipment be certiﬁ ed for this use.

Figure 3-10. Air Bleed Valves

Clean Switch

Figure 3-11 Clean Control

D. Place the Main Power OFF/ON and Freezing

Cylinder OFF/ON switches in the ON position then press the CLEAN button (Fig. 3-11).

E. Check for leaks when the freezing cylinder is ﬁ rst

pressurized with sanitizing solution.

1. Check for leaks at the front door seals.

2. Check the drain located above the center of the Drip Tray for leaks coming from the rear of the Rear Auger Seal.

3. Check inside the cab unit for leaks at hose connections.

F . Using a sanitized soft bristle brush or equivalent,

dipped in sanitizing solution, clean mix container.

G. After ﬁ ve minutes, open spigot to expel sanitizing

solution. Drain all solution from machine using all three spigots.

H. When solution has drained, press the CLEAN

button to stop the auger and place the Main Power OFF/ON and Freezing Cylinder OFF/ON switches in the OFF position. Allow the machine barrel to drain completely.

The machine is now sanitized and ready for adding mix.

3.10 INITIAL FREEZE DOWN AND OPERATION

Every Stoelting soft serve machine needs to be set on site. The following adjustment will provide optimal product

consistency while prolonging product life.

NOTE

The machine is designed for correct operation in ambient temperatures between 50°F and 110°F. T emperatures out of that range may cause refrigeration problems and product quality issues.

A. ADDING MIX

1. Sanitize immediately before use.

2. Make sure the Freezing Cylinder OFF/ON switch is in the OFF position.

3. Fill the storage containers in the cab with at least

2.5 gallons of mix.

4. Attach the mix inlet probes to the container and place the containers in the refrigerated cab.

5. Place the mix pump switch in the ON position (Fig. 3-12).

Mix Pump

Switches

Figure 3-12 Refrigerated Cabinet

6. Place a container under the spigot and open the spigot to allow the mix to ﬂ ush out about 8 ounces (0.23 liters) of sanitizing solution and liquid mix. Close the spigot.

7. Open the air bleed valve on the front door by pressing and holding (Fig. 3-13). Hold the valve open until the mix level in the freezing cylinder is 1/2” from the air bleed valve.

Air Bleed

Valve

Reed

Switch

NOTE

Do the initial adjustment for the left side and right side separately.

Figure 3-13 Air Bleed Valves

B. PREPARING INTELLITEC CONTROL

8. On the IntelliTec control, press and hold SEL button for 8 seconds. While still holding the SEL button, press the up arrow () button. The LCD will read “DISPLAY”.

9. Press the left arrow () button once. The display will read “BASIC”.

10. Press the up arrow () button once. The display will read “CutOut amps”.

1 1. Press the SET button. A cursor will start blinking

under the far right digit.

12. Change the value to 8.0. Press the left arrow () button to move the cursor. Press the up arrow () button to increase the digit. When a digit reaches 9, pressing the up arrow () button again will change the value to 0.

13. After entering 8.0, press SET to save this value. The LCD will read “CutOut Set -- OK”.

14. Press the SEL button. The LCD will read “CutOut amps 8.0”.

15. Press the SEL button twice. The LCD will read “DISPLAY”.

16. Press the up arrow () button to navigate to the “°F” and “amps” readings.

C. INITIAL FREEZE DOWN

17. Place the Freezing Cylinder OFF/ON switch in the ON position.

18. Press the PUSH TO FREEZE button.

NOTE

After the drive motor starts, there is a 3-second delay before the compressor starts.

19. As the product freezes, the “amps” value on the display will increase. When it reaches 2.6A, open the spigot, take a 6-8 ounce sample and measure the temperature. For most soft serve mixes, the desired temperature is between 19.0°F and

19.5°F.

20. Draw samples at every increase of 0.2A until reaching the desired consistency and temperature.

NOTE

Show the sample to the customer and make sure it meets their required consistency and temperature.

21. Record the “amps” value.

22. Place the Freezing Cylinder OFF/ON switch in the OFF position.

D. ADJUSTING INTELLITEC CONTROL

23. Press the SEL button. The display will read “DISPLAY”.

24. Press the left arrow () button once. The display will read “BASIC”.

25. Press the up arrow () button once. The display will read “CutOut amps”.

26. Change the value to the recorded value by pressing the SET button. A cursor will start blinking under the far right digit.

27. Press the left arrow () button to move the cursor. Press the up arrow () button to increase the digit. When a digit reaches 9, pressing the up arrow () button again will change the value to 0.

28. Press the SET button to save the value. The LCD will read “CutOut Set -- OK”.

29. Press the SEL button. The LCD will read “CutOut amps” along with the programmed value from the previous step.

30. Press the SEL button three times. The LCD will read “EXITMENU”.

31. Press the up arrow () button to exit the menu.

32. Adjustment to the control is completed. If the adjustment was done for the left side, restart the procedure for the right side.

E. SERVING PRODUCT

33. Place the Freezing Cylinder OFF/ON switch in the ON position.

34. Press the PUSH TO FREEZE button.

35. When the product is at 75% consistency, the display will read “SERVE”.

36. For normal dispensing, move the spigot handle fully open.

37. The machine dispenses product at a reasonable draw rate. If the machine is overdrawn, the result is a soft product or a product that will not dispense at all. If this occurs, allow the machine to run for approximately 30 seconds before dispensing more product. Spigot rate adjustors are located under the header panel, to the immediate right of each spigot handle. Turning the spigot rate adjuster counterclockwise will decrease the dispense rate.

38. Do not operate the machine when the MIX LOW message is displayed. Reﬁ ll the mix container immediately.

NOTE

The machine has a standby and sleep mode. After a preset number of freezing cycles, it will enter the standby mode (followed by sleep mode) and remain there until someone draws product or presses the PUSH TO FREEZE button. In the sleep mode, the machine will keep the product below 41°F (7.2°C). Sleep modes do not take the place of cleaning and sanitizing. Federal, State, and local regulatory agencies determine frequency of cleaning and sanitizing.

3.11 NORMAL FREEZE DOWN AND OPERATION

The following section contains the recommended operating procedures for the safe operation of the machine.

1. Sanitize immediately before use.

2. Make sure the Freezing Cylinder OFF/ON switch is in the OFF position.

3. Fill the storage containers in the cab with at least

2.5 gallons of mix.

4. Attach the mix inlet probes to the container and place the containers in the refrigerated cab.

5. Place the mix pump switch in the ON position.

6. Place a container under the spigot and open the spigot to allow the mix to ﬂ ush out about 8 ounces (0.23 liters) of sanitizing solution and liquid mix. Close the spigot.

7. Open the air bleed valve on the front door by pressing and holding. Hold the valve open until the mix level in the freezing cylinder is 1/2” from the air bleed valve.

8. Place the Freezing Cylinder OFF/ON switch in the ON position.

NOTE

After the drive motor starts, there is a 3-second delay before the compressor starts.

9. Press the PUSH TO FREEZE button.

10. When the product is at 75% consistency, the display will read “SERVE”.

11. For normal dispensing, move the spigot handle fully open.

12. The machine dispenses product at a reasonable draw rate. If the machine is overdrawn, the result is a soft product or a product that will not dispense at all. If this occurs, allow the machine to run for approximately 30 seconds before dispensing more product. Spigot rate adjustors are located under the header panel, to the immediate right of each spigot handle (Fig. 3-14). Turning the spigot rate adjuster counterclockwise will decrease the dispense rate.

CAUTION

Risk of Product Damage

Mix pump hose must be repositioned every 800 gallons of mix served or 2 weeks. Failure to comply will result in reduced mix pump liquid capacity , dispense stoppage, popping, and possible mix pump hose leakage. Hose leakage may damage the pump roller assembly and void the factory warranty

Dispense

Rate

Adjustors

Figure 3-14 Dispensing Product

13. Do not operate the machine when the MIX LOW message is displayed or with less than 1-3/4" (4.4 cm) of mix in the hopper. Reﬁ ll the hopper immediately.

NOTE

The machine has a standby and sleep mode. After a preset number of freezing cycles, it will enter the standby mode (followed by sleep mode) and remain there until someone draws product or presses the PUSH TO FREEZE button. In the sleep mode, the machine will keep the product below 41°F (5°C). Sleep modes do not take the place of cleaning and sanitizing. Federal, State, and local regulatory agencies determine frequency of cleaning and sanitizing.

3.12 MIX INFORMATION

Mix can vary considerably from one manufacturer to another. Differences in the amount of butterfat content and quantity and quality of other ingredients have a direct bearing on the ﬁ nished frozen product. A change in machine performance that cannot be explained by a technical problem may be related to the mix.

Proper product serving temperature varies from one manufacturer’s mix to another. Mixes should provide a satisfactory product in the 17° to 20°F (-7° to -6°C) range. Diet and low-carb mixes typically freeze to proper consistency at higher temperatures.

When checking the temperature, stir the thermometer in the frozen product to read the true temperature.

Old mix, or mix that has been stored at too high a temperature, can result in a ﬁ nished product that is unsatisfactory. To retard bacteria growth in dairy based mixes, the best storage temperature range is between 36° to 40°F (2.2° to 4.4° C).

3.13 OPERATION OF MIX PUMP

The mix pump switches are located in the upper left hand corner, inside the refrigerated cabinet. When a pump switch is placed in the ON position, the mix pump motor will start pumping mix into the machine cylinder. When the set pressure is reached, the mix pump will shut off automatically . When the switch is placed in the OFF position, the mix pump will be inoperative.

NOTE

The mix pump motor is equipped with an internal overload that will “trip”, disabling the pump when the motor is overloaded. Consult the trouble shooting section for corrective information. The internal overload will automatically reset after cooling. If the condition continues, contact a qualiﬁ ed service person.

A. Mix Operation: The peristaltic mix pump contains

one continuous mix pump hose. When looking at the face of the peristaltic mix pump, the left side of the hose is the suction or pickup. The right side of the hose is the discharge. Mix is drawn up the suction side of the hose and transferred through the discharge side to the machine (see Figure 3-15).

Air Line

Air/mix to

Freezing Cylinder

3-way

Tee

NOTICE

Any cleaning procedure must always be followed by sanitizing before ﬁ lling machine with mix. (Refer to section 3.3)

3.14 MIX PUMP CLEANING

The mix pump is approved for CIP (clean in place) and is thoroughly cleaned as cleaning solutions are pumped through the machine. We recommend completely disassembling the pump and disconnecting tubing every 14 days for inspection of parts to conﬁ rm the CIP has been properly performed. If any residue is detected clean or replace those parts as outlined below.

A. Place the Main Power OFF/ON and Freezing

Cylinder OFF/ON switches ON position and press the CLEAN button. Allow the auger to agitate for 5 to 10 minutes.

B. Remove suction tube from mix container. Draw

off the mix remaining in machine barrel.

C. Pump 2 gallons (7.5 liters) of potable water through

machine until water at spigot is free of mix.

D. Pump 2 gallons (7.5 liters) of 90° to 1 10°F (32°C to

43°C) detergent solution water through machine. The use of soft water is recommended, along with dishwashing detergents such as “Joy,” “Dawn,” or equivalent.

E. Place mix pump switch in OFF position. Open

spigot to relieve remaining pressure.

F. Press the CLEAN button to stop the auger and

place the Main Power OFF/ON and Freezing Cylinder OFF/ON switches in the OFF position.

3.15 DISASSEMBLY AND INSPECTION OF

REMOVABLE PARTS

Inspection of removable parts should be made whenever maintenance is performed or pump requires disassembly .

Mix

Intake

Figure 3-15 Mix Pump Hose Routing

B. Air Operation: The air compressor operates

whenever the peristaltic mix pump is running. Air enters through a check valve on the piston downstroke. The air is discharged through a second check valve, on the piston upstroke. The air and mix join at the tee and then travel to the machine.

C. The overrun adjustment is preset at the factory.

If an adjustment becomes necessary, refer to Section 4.

WARNING

Hazardous Moving Parts

Revolving pump head can grab, mangle, and cause serious crushing injury. The Main Power OFF/ON switch must be placed in the OFF position for cleaning and power must be disconnected when disassembling or servicing.

NOTE

If the mix lines or air line is difﬁ cult to remove, soften tubing with a rag soaked in hot water. Hose connections may be sprayed with Haynes Sanitary Lubricant for ease of removal. Do not loosen or remove the mix pump cover wing nuts. Maintain the mix pump hose in its operational condition.

CAUTION

System Under Pressure

Never disconnect hoses from machine or pump without ﬁ rst opening spigot to relieve pressure.

A. Loosen clamp and remove air hose from pump

compressor.

B. Loosen clamp and disconnect mix pump hose.

Remove the pickup hose, mix check valve and pickup hose adapter (and bag adapter if applicable) as an assembly from mix container.

C. Completely disassemble both hose assemblies

and check valve. Place hoses, tee, check valve assembly, and pickup hose adapter in 90° to 110°F (32°C to 43°C), mild detergent water and wash thoroughly . Use soft bristle brushes to clean inside of ﬁ ttings. Rinse all parts in clean 90° to 1 10°F (32°C to 43°C) water (see Figure 3-16 and 3-17).

D. Carefully inspect each part for wear or damage.

Replace worn or damaged parts.

E. Wash feed tube and air tube with 90° to 110°F

detergent water and brushes provided. Rinse with clean, 90° to 110°F water (See Figure 3-18 and 3-19).

Figure 3-18 Cleaning Air Tube

Figure 3-16 Removable Parts

Figure 3-17 Removable Parts for optional BCS

Figure 3-19 Cleaning Feed Tube

F. Prepare two gallons (7.5 liters) of sanitizing

solution using a USDA certiﬁ ed grade sanitizing solution. Sanitize all removed parts, then air dry .

G. Check Hose Service Record decal to determine

if hose reposition or replacement is required at this time.

H. Reassemble both hose assemblies per the

diagram located on the inside of the cab door. Reconnect assemblies to the pump and discharge hose, using the clamps. (Refer to Section 2.5 Mix Pump).

I. Sanitize assembled machine as per instructions

outlined in Section 3.9.

SECTION 4

MAINTENANCE AND ADJUSTMENTS

4.1 MACHINE ADJUSTMENT

This section is intended to provide maintenance personnel with a general understanding of the machine adjustments. It is recommended that any adjustments in this section be made by a qualiﬁ ed person.

4.2 PRODUCT CONSISTENCY ADJUSTMENT

The operator can adjust product consistency by modifying the Fine Adjustment setting on the membrane switch. This is the only adjustment that can be made by the operator without using a pass code key sequence. Product consistency ﬁ ne adjustment allows a 0.4 amp maximum adjustment to the drive motor amp draw cutout. Increasing this setting will increase the drive motor amperage cutout and increase product consistency . Follow the instructions below to make ﬁ ne adjustments to product consistency.

A. Place the Main Freezer Power switch in the ON

position.

B. Press the SET button on the Control Panel once.

Fine Adj will appear on the LCD screen.

C. Press the up arrow button until the desired

consistency setting is displayed. The higher the number, the ﬁ rmer the product consistency. The control may be set from 1 to 9. The value increases by 1 each time the up arrow button is pressed. After the value reaches 9, numbering restarts at

0. The 0 setting cannot be set.

D. Press the SET button once to save the setting

and return to the current mode display.

4.3 LOCKING THE CONTROL PANEL

The IntelliT ec control has a tamper proof mode to prevent unauthorized use. When set, all buttons on the control panel are disabled. Follow the instructions below to lock the control panel

A. Press and hold the PUSH TO FREEZE button

for at least 5 seconds.

B. While still holding the PUSH T O FREEZE button,

press the CLEAN button once.

C. Release both buttons. An asterisk (*) will appear

on the bottom line of the display, indicating that the control is in the lock out mode.

NOTE:

Repeat steps A, B, and C to unlock the control panel.

4.4 OBTAINING READINGS AND

MODIFYING SETTINGS (SERVICE PERSONNEL ONLY)

Readings and settings on the IntelliTec control are accessed through the IntelliTec control menu settings. Locating machine readings and system function settings are done using the up arrow () and left arrow () buttons on the membrane switch. A printed IntelliTec Menu Settings sheet is located in the information pouch behind the header panel.

IntelliTec Control Readings

To obtain machine readings, locate the value on the machine’s menu settings sheet and follow the steps below.

A. Press and hold the SEL button for 8 seconds. While

still holding the SEL button, press the up arrow button (). The LCD screen will read DISPLAY.

B. Release both buttons. C. Press the up arrow button () to navigate to the

correct reading under DISPLA Y or press the left arrow () button to navigate to the ERRCODES menu.

D. Press the up arrow () and left arrow () buttons

to navigate through the rest of the readings as needed.

E. When all readings have been obtained, press

the up arrow button () from ExitMenu to return to the current mode display.

Modifying Control Settings

To change the value of a system function, locate the function on the IntelliTec Settings Menu and follow the steps below.

Figure 4-1 Caption

IMPORTANT:

Before making changes to any settings, record the original values. If the setting changes do not achieve desired results, return settings to their original values.

A. Press and hold the SEL button for 8 seconds. While

still holding the SEL button, press the up arrow

button (). The LCD Screen will read DISPLAY. B. Release both buttons. C. Press the left arrow button () to get to the correct

menu (Basic, Advanced, or Storage). D. Press the up arrow button () to navigate to the

value that needs to be changed. E. Press the SET button to enter the edit mode. F. Press the up arrow button () to change the

setting. G. Press the SET button to save the setting and exit

the edit mode. H. Press the up arrow () and the left arrow ()

buttons to navigate through the rest of the settings

as needed. I. When all changes have been completed, press

the up arrow button () from ExitMenu to return

to the current mode display.

4.5 READINGS (SERVICE PERSONNEL ONLY)

The IntelliTec control continuously monitors and records temperatures, voltages, amps, and error code details. Each reading is beneﬁ cial to service personnel when troubleshooting.

DISPLAY READINGS

Following are the readings available under the DISPLA Y menu:

Cabinet

The temperature of the cab is constantly monitored

by the IntelliTec control.

Cycles (count)

This reading counts down the number of cycles

in the current “Serve Mode”. The starting value

is dependant upon the Cycles setting on the

IntelliTec control.

°F and amps

Suction line temperature on the freezing cylinder

and drive motor amps are available on the same

screen to assist with setup and troubleshooting.

Aux. Temp (°F)

This reading provides the ambient temperature

around the IntelliTec control board.

Supply V (VAC)

A calculated input voltage is recorded.

ERROR CODE READINGS

The following details are recorded under the ERRCODES menu for each of the last 25 error codes received:

Err1 (hours)

A numerical count of the last 25 error codes is

recorded. When the 26th error has occurred, the earliest error code is erased. A timer also begins when an error occurs. The timer records the number of hours since the error occurred. If power to the machine is interrupted, the timer will stop until power has been restored.

°F and amps

The suction gas temperature on the freezing

cylinder and the drive motor amps are recorded at the time of the error.

Aux. Temp (°F)

Ambient temperature of the IntelliT ec control board

is recorded at the time of the error.

Str (°F)

The storage temperature is recorded at the time

of the error.

VAC and Mode

A calculated input voltage and mode at which

the error occurred are recorded. Following are

descriptions of each mode: Mode Description 0 Start of freezing cycle 1 Compressor and drive motor on 2 Stir Cycle 3 Compressor off 4 “Standby Mode” 5 “Sleep 1 Mode” 6 “Sleep 2 Mode” 7 “Clean Mode” 8 Startup 9 Storage only refrigeration 10 Freezing cycle is shut down 11 Door safety switch triggered 12 High pressure cutout

Up Time (hours)

This value is a record of the total time the machine

has been in service. If power is interrupted, the

timer will stop until power is restored. This timer

does not reset.

RUN STATISTICS

In addition to dynamic readings and recorded

error code details, the IntelliTec control records rolling averages of run statistics. Following are the readings available under the RUNST ATS menu:

On Times (sec)

The control records the time of each freezing

cycle and provides a rolling average.

Off Times (sec)

The control records the time between freezing

cycles and provides a rolling average.

Brl. Min (°F)

The lowest average barrel temperature is

recorded.

Brl. Max (°F)

The highest average barrel temperature is

recorded.

Stor Min (°F)

The lowest average cabinet temperature is

recorded.

Stor Max (°F)

The highest average cabinet temperature is

recorded.

Power On (hrs)

This value is a record of the time the machine

has been in service. If power is interrupted, the timer will reset.

4.6 ADJUSTMENTS (SERVICE PERSONNEL ONLY)

The following adjustments directly affect product consistency and length of time in “Serve Mode”. The default settings have been created using a 5% milkfat soft serve mix and provide optimal product consistency while prolonging product life.

CutOut (amps)

It is recommended to set the CutOut value at

initial startup and when changing mix types. Adjustments to this setting directly affect the length of the freezing cycle and indirectly change product consistency. To properly set the CutOut value, during startup navigate to the “°F” and “amps” values under the Display menu (Refer to Section

4.4), start the machine and freeze the product to the desired consistency . Monitor consistency by taking a 6 ounce sample at each change of the “amps” display. When the desired consistency has been reached, record the temperature and amps, and change the CutOut value to the recorded amps value.

Cut In T (°F)

After the consistency value has been determined,

the Cut In T value can be adjusted. The Cut In T

is the temperature of the refrigerant gas coming

out of the freezing cylinder. Changing this setting

changes the temperature at which the freezing

cycle starts. Decreasing the Cut In T decreases

the amount of off time. This creates a greater

chance of product breakdown by stirring the

product often. Increasing the Cut In T increases

the amount of off time, which may cause heat

shock within the product.

Cycles (count)

This setting determines the number of freezing

cycles during “Serve Mode”. Increasing the value

will increase the total time in “Serve Mode”. Factory

default is 20 cycles, which results in “Serve Mode”

lasting about 2-1/2 hours without the PUSH TO

FREEZE button being pressed or a spigot handle

being pulled. If the PUSH TO FREEZE button is

pressed or the spigot handle is pulled at any time

during “Serve Mode”, the Cycles count will reset.

4.7 OTHER SETTINGS (SERVICE PERSONNEL ONLY)

Changing any setting on the IntelliTec control will alter machine operation and affect the product temperature, consistency , or life. Refer to the IntelliT ec Control System Settings sheet located in the information pouch behind the header panel of the machine. If any of the following settings on the IntelliTec control differ from the System Settings sheet, it is recommended to return those settings to factory defaults.

Stir On (sec)

Adjustments to this setting affect the amount of

time the auger rotates in the stir cycle. The stir

cycle occurs in “Serve Mode”, “Standby Mode”,

and “Sleep 2 Mode”.

Stir Off (sec)

Adjustments to this setting affect the time between

stir cycles. The stir cycle occurs in “Serve Mode”,

“Standby Mode”, and “Sleep 2 Mode”.

On Time (sec)

Increasing this value will increase the length of the

freezing cycle during “Standby Mode” and result

in a decrease of average product temperature in

the barrel.

Off Time (sec)

Increasing this value will increase the time between

freezing cycles in “Standby Mode” and result in

an increase of product temperature in the barrel.

Stb Time (sec)

This setting determines the total amount of time

in “Standby Mode”.

Sl1DrvOn (sec)

Adjustments to this setting affect the amount of

time the auger rotates in the stir cycle. This stir cycle only occurs in “Sleep 1 Mode”.

Sl1DrOff (sec)

Adjustments to this setting affect the time between

stir cycles. The stir cycle only occurs in “Sleep 1 Mode”.

Sl2CutIn (°F)

Changing this setting affects the temperature at

which the freezing cycle starts in “Sleep 2 Mode”.

Sl2CtOut (°F)

Changing this setting affects the temperature at

which the freezing cycle stops in “Sleep 2 Mode”.

DftOffTm (sec)

In “Serve Mode”, this value determines the

maximum time without a freezing cycle. If this value is met, a freezing cycle will start. In the event of a freezing cylinder temperature sensor failure, this value affects the amount of time between freezing cycles during “Serve Mode”.

Refriger

This setting changes how the control handles the

storage refrigeration cycle. The setting for the left control is “Cabinet” and “None” on the right control.

CabCutIn (°F)

If the Refriger value is set to Cabinet, this

setting determines the temperature at which the refrigeration cycle starts. If None, 1 Hopper, or 2 Hopper is selected for the Refriger setting, CabCutIn will not be shown on the IntelliT ec menu.

CabCtOut (°F)

If the Refriger value is set to Cabinet, this

setting determines the temperature at which the refrigeration cycle stops. If None, 1 Hopper, or 2 Hopper is selected for the Refriger setting, CabCtOut will not be shown on the IntelliTec menu.

Cab Off

If the Refriger value is set to Cabinet and the

temperature sensor in the cabinet fails, this setting determines the time between refrigeration cycles. If None, 1 Hopper, or 2 Hopper is selected for the Refriger setting, Cab Off will not be shown on the IntelliTec menu.

Cab On

If the Refriger value is set to Cabinet and the

temperature sensor in the cabinet fails, this setting

determines the length of the refrigeration cycle. If

None, 1 Hopper, or 2 Hopper is selected for the

Refriger setting, Cab On will not be shown on the

IntelliTec menu.

4.8 OVERRUN ADJUSTMENT

The product, when served, is a combination of air and mix. Overrun is a measure of the amount of air blended into the mix.

Overrun can be expressed in terms of the amount of weight loss for a given volume. For example, if a pint of liquid mix weighs 18 ounces and a pint of frozen product with air added weighs 12 ounces, the overrun is said to be 50 percent: 18 oz. - 12 oz. = 6 oz., (6/12) x 100 = 50%

The overrun can be checked by placing a one pint container on an ice cream scale and zeroing out the scale. Then ﬁ ll a one pint container with frozen product. The container should be ﬁ lled over the top and leveled with a straightedge. The product should not contain any air pockets. When weighed on an ice cream scale, one pint of product should weigh 12 to 13 ounces.

The mix pump has been preset at the factory to produce a product with approximately 40% overrun. Because of differences in mix formulation, temperatures and barometric pressure, this ﬁ gure may vary . It will be necessary for approximately 2 gallons of mix to be pumped through the machine before overrun changes in the product are noticeable.

Overrun is controlled by the length of the air compressor piston stroke within the piston cylinder. Lengthening the stroke within the cylinder will increase overrun. Conversely, shortening the stroke will decrease overrun. To perform an overrun adjustment, refer to the following procedure:

A. Turn the mix pump switch to the OFF position.

Disconnect power sources/circuit breakers. B. Remove the back panel from the machine. C. On the air compressor side of the pump, locate

the long/slender piston rocking arm. The rocking

arm downward travel is limited by a stationery

cam. On the face of the cam there is an overrun

setting indicator plate numbered 3 through 8 and

an adjustment knob (Fig. 4-2).

WARNING

Hazardous Voltage

The Main Freezer Power switch must be placed in the OFF position when disassembling for servicing. The machine must be disconnected from electrical supply before removing any access panel. Failure to disconnect power before servicing could result in death or serious injury.

D. The overrun setting is indicated by a pin. E. To adjust overrun, loosen the allen-head screw

(located within the center of the adjustment knob) with the 5/32” allen wrench provided. Rotate the adjustment knob counterclockwise to a higher number for higher overrun, or clockwise to a lower number for lower overrun. Each number multiplied by 10 represents the overrun percentage (i.e. setting 4 = 40% overrun).

Figure 4-2 Overrun Adjustment

F. Tighten the allen screw, then place the wrench

back in its clip. Replace the lower back panel and secure with the four screws. Turn the mix pump power switch to the ON position.

4.9 MIX PUMP HOSE REPOSITION

Mix pump hose must be repositioned every 800 gallons of mix pumped or every 2 weeks. Failure to reposition the hose will result in reduced mix pump liquid capacity, dispense stoppage, popping, and possible mix pump hose leakage. Follow the steps below to reposition the hose:

A. Run cleaning solution through pump. B. Turn the pump off and relieve any pressure by

opening the spigot.

C. Grasp the pickup hose end of the mix pump hose

with one hand and turn the pump on. Pull down on the pickup hose end until 12 to 14 inches of tubing has fed through the pump then turn the pump off (Fig. 4-3).

D. Loosen the small clamp at the pick-up hose

adapter and disconnect the mix pump hose.

E. Cut 7-1/2 inches off the end of the mix pump

hose. F. Reconnect the mix pump hose to the adapter. G. Continue normal operation. Mix hose will

automatically reposition itself with the adapter

near the black cover.

Pickup

End

Figure 4-3 Pump Hose Reposition

Each hose is long enough for 3 repositions before replacement is required.

12” to 14”

NOTE

4.10 MIX PUMP HOSE REPLACEMENT

Mix pump hose must be replaced when tubing cannot be further repositioned (every four to eight weeks). Failure to comply will result in hose failure and possible pump damage. Follow the steps below to replace the hose:

A. Run cleaning solution through pump. B. Turn the pump off and relieve any pressure by

opening the spigot. C. Disconnect the mix pump hose at each end. D. Grasp the discharge hose end with one hand and

turn the pump on. Pull down on the hose until all

of the remaining hose is removed from the pump.

Turn pump off. E. Rotate pump roller assembly so one roller is at

the 6:00 position. F . Use a brush that ﬁ ts in the opening and clean the

pump roller assembly, ﬁ rst with detergent water

and then clear water. G. Connect the new mix pump hose to the pickup

hose adapter using the small clamp. H. Feed one end of the mix pump hose into the

pickup hose side (left) of the black cover.

NOTE

Feed the tube into the clamp so the natural curve of the tube is towards the outside of the black cover. This prevents the hose from looping around the black cover twice.

IMPORTANT:

Before making changes to any settings, record the original values. If the setting changes do not achieve desired results, return settings to their original values.

I. Gently push the hose into the black cover until it

begins to feed.

J. Allow the hose to feed itself through the pump

until about 6” (15cm) remains on the entering

side. K. Turn pump off. L. Connect the mix pump hose to the elbow ﬁ tting

(located on the left side of the mix line manifold)

using a small hose clamp. Be careful not to twist

the mix hose. M. Turn the pump on. N. Allow the remaining 6” (15cm) of tubing to feed

through the pump until the hose adapter prevents

further feeding. O. Turn the pump off.

CAUTION

Risk of Product Damage

Air/Mix Tee must remain below the black cover clamp. If the Tee is above the pump, the mix may drain into the air compressor, resulting in pump damage.

P . Connect the free end of the mix pump hose to the

3-way Tee. When all connections are complete,

the 3-way T ee must be lower than the black pump

housing. Q. The pump is now ready to sanitize.

4.11 CAB TEMPERATURE ADJUSTMENT

Cab temperature is monitored and controlled by two settings on the IntelliTec control: CabCutIn and CabCtOut. The cut in value determines the temperature at which the refrigeration cycle starts. The cut out setting determines when the cycle stops. To change the CabCutIn or CabCtOut, follow the steps below:

A. Press and hold SEL button for 8 seconds. While

still holding the SEL button, press the up arrow

button (). The LCD Screen will read "Display". B. Release both buttons. C. Press the left arrow button () three (3) times to

navigate to the Storage menu. D. Press the up arrow button () once to navigate

to the CabCutIn value. Record this value.

E. Press SET button to enter edit mode. F. Press the up arrow button () to increase the

number to the value required. The value increases by 1 each time the up arrow button () is pressed. After the value reaches 9, numbering restarts at

G. Press SET button to save the setting and exit the

edit mode.

H. Press the up arrow button () once to navigate

to the CabCtOut value. Record this value. I. Press SET button to enter edit mode. J. Press the up arrow button () to increase the

number to the value required. The value increases

by 1 each time the up arrow button () is pressed.

After the value reaches 9, numbering restarts at

K. Press SET button to save the setting and exit the

edit mode. L. Press the up arrow () and left arrow () buttons

to navigate to ExitMenu. M. Press the up arrow button () from ExitMenu to

return to the Mode Screen. N. Locate the Speciﬁ cation Sheet for F431 Control

behind the header panel and record the new

values on this sheet.

WARNING

Hazardous Voltage

4.12 DRIVE BELT TENSION ADJUSTMENT

A. Remove a side panel and the back panel. B. Use a Burroughs Belt Tension Gauge to set the

tension for the drive belt. Set the belt tension to

40-50 lbs. C. If an adjustment is necessary, loosen the four

motor plate retaining nuts, adjust belt tension

then retighten the four nuts.

NOTE

Belt life will be increased if new drive belts are tightened after two or three weeks of operation.

4.13 CONDENSER CLEANING (AIR-COOLED MACHINES)

The condenser requires periodic cleaning. To clean the condenser, refer to the following steps:

A. Lift the condenser ﬁ lter off of the machine cover

panel. Visually inspect the condenser ﬁ lter for dirt (Fig. 4-4).

Figure 4-4 Removing Condenser Filter

B. If the condenser ﬁ lter is dirty, vacuum or brush

it clean. Rinse it with clean water and allow it to dry before replacing it on the machine.

NOTE

If the condenser is not kept clean, refrigeration efﬁ ciency will be lost.

4.14 PREVENTATIVE MAINTENANCE

It is recommended that a preventative maintenance schedule be followed to keep the machine clean and operating properly . The following steps are suggested as a preventative maintenance guide.

The United States Department of Agriculture and the Food and Drug Administration require that lubricants used in food zones be certiﬁ ed for this use. Use lubricants only in accordance with the manufacturer’s instructions.

A. Daily checks Check for any unusual noise or condition and

repair immediately.

B. Monthly checks

1. Check drive belts for wear and tighten belts if necessary. (Refer to section 4.12)

2. Check the condenser ﬁ lter for dirt. (Refer to section 4.13).

4.15 EXTENDED STORAGE

Refer to the following steps for winterizing the machine or for storing the machine over any long period.

A. Clean all of the parts that come in contact with

mix thoroughly with warm detergent . Rinse in clear water and dry all parts. Do not sanitize.

NOTE

Do not let cleaning solution stand in machine barrel or mix pump during the shutdown period.

B. Remove, disassemble, and clean the front door,

auger shaft, and mix pump. Leave disassembled during the shutdown period.

C. Place the plastic auger ﬂ ights in a plastic bag with

a moist paper towel. This will prevent the ﬂ ights from becoming brittle if exposed to dry air over an extended period (over 30 days).

D. For water-cooled machines that are left in unheated

buildings, or buildings subject to freezing, the water must be shut off and disconnected. Disconnect the ﬁ ttings at the water inlet and the water outlet lines of the machine. The ﬁ ttings are located at the rear of the machine. Run the compressor for 2 - 3 minutes to open the water valve. Blow out all the water, ﬁ rst through the water inlet, then through the water outlet lines with air or carbon dioxide. Drain the water supply line coming to the machine.

E. Place the Pump OFF/ON switch and the Main

Freezer Power OFF/ON switch in the OFF position.

F. Disconnect the machine from the source of the

electrical supply in the building.

SECTION 5

TROUBLESHOOTING

5.1 ERROR CODES

When the machine experiences a problem, one of the following error codes will be displayed on the control panel. Each error code directs you to the system location of the malfunction.

ERROR CODE MALFUNCTION 1 Soft 2 High Torque 3 Extended Run Time 4 Clean 5 Barrel Sensor 6 Hopper Sensor 7 Drive Motor 8 Cab Sensor 9 High Pressure Cutout 10 Auxiliary Sensor 11 Low Temperature To return the machine to normal operation, any error

causing condition must be corrected and the Freezing Cylinder Off-On switch must be placed in the Off position and back in the On position before the affected side of the machine will return to normal operation.

5.2 TROUBLESHOOTING - ERROR CODES

Error Code 1 - Soft Error The Soft Error (E1) is an internal control board error

that is logged for future analysis. The refrigeration is never stopped and the machine will continue to operate normally.

Error Code 2 - High Torque If the control panel displays a High Torque Error

(E2), the controller has sensed that the drive motor is running at 125% of the preset CutOut amp setting for 10 or more seconds. This may be due to the product consistency adjustment being set too high. Place the Main Power OFF/ON switch in the OFF position, wait until the product in the freezing cylinder thaws to a reasonably soft consistency and return the Main Power switch to the ON position. Follow the steps in section 3 to reduce product consistency by a few levels. If the error persists, contact your uthorized Stoelting Distributor for further assistance.

Error Code 3 - Run Time The Run Time Error (E3) occurs when the

compressor runs continuously for 20 minutes without the product reaching consistency in “Serve Mode” or if the product does not reach proper temperature in “Sleep 2 Mode”. This

error is generally caused by very low mix levels in the machine’s mix container or from product breakdown. Another common cause results from a restriction preventing mix from entering the freezing cylinder. Check the mix in the cabinet. If the level mix is low, add mix. If there is a possibility that the mix is broken down, clean and sanitize the machine and replace the mix with fresh product.

Ice crystals in the liquid mix container can clog the

mix inlet system and prevent mix from entering the freezing cylinder. Thoroughly thaw mix per manufacturer’s recommendations. To check for ice crystals, pour a small amount of product in the mix container through a clean and sanitized sieve or strainer. If ice crystals are in the mix, check the temperature of the walk-in cooler where the mix is stored or the temperature of the machine’s cabinet.

Check the condition of the neoprene hose running

through the mix pump head. If it shows signs of wear, rotate or replace it as outlined in Section

In air cooled machines, the Run Time Error may

indicate that airﬂ ow within the machine has reduced or stopped. Check the sides and top of the machine for anything that would restrict airﬂ ow.

If the error persists after attempting to clear it,

contact your Authorized Stoelting Distributor for

further assistance. Error Code 4 - Clean If the machine is left in the Clean Mode for more

than 20 minutes, the control panel will display a

Clean Error (Error 04). This condition does not

reﬂ ect a problem with the machine itself. The Clean

Error has been programmed into the controller as

a safeguard to protect the machine from potential

damage caused by the machine being accidentally

left in “Clean Mode”. The control will attempt to

restart itself after 5 minutes. The display will then

ﬂ ash and read Restart. T o immediately clear the

Clean Error, place the Main Power Of f-On switch

in the Off position and back in the On position.

After restarting the machine, a refrigeration cycle

will begin. This protects the product in case the

clean button was pressed by mistake.

Error Code 5 - Freezing Cylinder Sensor The Freezing Cylinder Sensor Error (E5) indicates

a failure of the barrel sensor or an extreme out of range condition (< -34°F or > 99°F). If the control panel displays an E5, place the Freezing Cylinder Off-On switch in the Off position and back in the On position. If the error persists, contact your Authorized Stoelting Distributor for further assistance.

NOTE

When the machine encounters a Freezing Cylinder Sensor Error, the machine will continue to run using preset timers. This mode will allow the operator to continue serving product until the machine can be serviced.

Error Code 6 - Hopper Sensor (single hopper machines) The Hopper Sensor Error (E6) will not occur on

the F431 machine. Error Code 7 - Drive Motor If the control panel displays a Drive Motor Error

(E7), the control does not sense current coming

from the drive motor. Place the Freezing Cylinder

Off-On switch in the Off position and back in

the On position. If the error persists, contact

your Authorized Stoelting Distributor for further

assistance. Error Code 8 - Cab Sensor A Cab Sensor Error (E8) indicates a cabinet

temperature sensor failure or. This error will also

appear in an extreme out of range condition (<

-34°F or > 99°F). If the control panel displays an

E8, place the Freezing Cylinder Off-On switch in

the Off position and back in the On position. If the

error persists, contact your Authorized Stoelting

Distributor for further assistance. Error Code 9 - High Pressure Cutout High Pressure Cutout Errors (E9) are usually

caused by a dirty or inefﬁ cient condenser. In air cooled condenser models, check for proper

air clearance around the machine. In water cooled condenser models check for

proper water ﬂ ow. If the error persists, contact your Authorized

Stoelting Distributor for further assistance.

Error Code 10 - Auxiliary Sensor An Auxiliary Temperature Sensor Error (R10)

occurs if the temperature sensor on the control board fails. Place the Freezing Cylinder OffOn switch in the Off position and back in the On position. If the error persists, contact your Authorized Stoelting Distributor for further

assistance. Error Code 11 - Low Temperature The Low T emperature Error (E11) occurs when the

temperature of the gas refrigerant at the freezing

cylinder sensor falls below -20°F. Although the

machine will not shut down, the active freezing

cycle will immediately end. This error usually

occurs when the machine continues to run in a low

mix condition or if the machine runs out of mix. The

product towards the front of the freezing cylinder

tends to freeze solid. When the temperature on

the freezing cylinder lowers to the preset value,

the IntelliTec control will display an E11. ALTERNATING FLASHING CONTROL PANEL LIGHTS The display panel lights will ﬂ ash in an alternating

sequence under any error codes. Clear the error

and place the Freezing Cylinder Off-On switch in

the Off position and back in the On position.

5.3 TROUBLESHOOTING - MACHINE

PROBLEM POSSIBLE CAUSE REMEDY

1. Power to machine is off. 1. Check power to machine.

Drive motor (auger) “kicks-out”, or does not run.

2. Low line voltage. 2. Check, must be ±10% of nameplate voltage.

3. Product too hard. 3. Raise overrun. (See Section 4.8)

4. Front door not installed securely. 4. Install front door securely.

1. Power to machine if off. 1. Check power to machine.

Compressor does not operate.

Product too soft.

Freeze-up. (Product will not dispense easily.)

Rear auger seal leaks.

Spigot leaks.

Drive belts slipping or squealing.

Mix temperature too warm in cab.

2. Low line voltage. 2. Check, must be ±10% of nameplate voltage.

3. Compressor internal overload is cutout.

4. Front door not installed securely. 4. Install front door securely.

1. CutOut setting is too low 1. Adjust CutOut setting to match product

2. Product break down. 2. Fill with fresh product.

1. CutOut setting is too high. 1. Adjust CutOut setting to match product

2. Low overrun setting. 2. Raise overrun. (See Section 4.8)

3. Low pump pressure. 3. Check pump pressure.

4. Large air pocket in barrel. 4. Purge air from barrel.

5. Auger turning counter-clockwise. 5. Change rotation to clockwise.

1. Seal missing or installed wrong. 1. Install correctly. (See Section 3.8)

2. Rear seal o-ring missing, broken or not lubricated.

3. Worn or scratched shaft. 3. Replace shaft.

1. Spigot parts are not lubricated. 1. Lubricate. (See Section 3.13)

2. Chipped or worn o-rings. 2. Replace o-rings.

3. O-rings on spigot installed wrong. 3. Remove spigot and check o-rings.

4. Nicks or scratched on front door where spigot is located.

1. Drive belt tension not correct. 1. Adjust belt tension. (See Section 4.12)

2. Worn belt(s). 2. Replace belts.

3. Low overrun. 3. Check for air leak.

1. Temperature control set too warm. 1. Decrease CabCtOut and CabCutIn (See

2. Cab door is open. 2. Close the cab door.

3. Check condenser (air cooled)(See Sect. 4.13), or water supply (water cooled).

requirements.(See Section 3.10)

2. Inspect for breakage and lubricate properly (See Section 3.8)

4. Replace front door.

Section 4.7)

5.4 TROUBLESHOOTING - MIX PUMP

PROBLEM POSSIBLE CAUSE REMEDY

1. Power to pump is off. 1. Supply power to pump.

2. Low voltage. 2. Check for low voltage.

3. Mix pump hose jammed inside black cover/clamp.

Pump motor does not run.

4. Pump motor overloaded. 4. Allow internal thermal overload to reset;

5. Pressure switch on pump is defective. 5. Check mechanical operation and continuity of

6. Defective motor/capacitor. 6. Check motor amperage draw and/or capacitor.

7. Defective toggle switch. 7. Check continuity; repair or replace.

NOTE 1: A PROPERLY WORKING PUMP WILL FILL AN 8 OZ. CUP WITH MIX IN ABOUT 9 SECONDS.

3. Disconnect pump from power source. Remove four cover/clamp thumb screws. Separate cover/clamp halves and remove outer half. Remove jammed hose. Clean and re-install cover/clamp and tighten four thumb screws securely. Allow motor thermal overload to reset.

determine overload cause and repair.

pressure switch.

Replace motor or capacitor.

Pump operates but cylinder will not ﬁ ll.

Overrun too low or no overrun.

NOTE 2: IMMEDIATELY AFTER A BAG CHANGE THE PUMP MAY BE UNABLE TO REESTABLISH IT’S PRIME WITH THE SYSTEM AT OPERATING PRESSURE. IN THIS CASE, TURN THE PUMP OFF. DRAW 2-3 PINTS TO REDUCE SYSTEM PRESSURE TO ZERO. TURN PUMP ON. PURGE REMAINING AIR IN MIX BAG AND PICK-UP HOSE.

IMPORTANT: Before connecting the pick-up hose to the mix bag, remove as much air from the mix bag as possible.

1. Out of Mix. 1. Replenish mix supply.

2. Mix pump hose kinked inside black cover/clamp.

3. Hoses assembled incorrectly. 3. Refer to diagram for correct hose connections.

4. Mix pump hose service life is exceeded.

5. Mix pump hose not connected to machine.

6. Ice crystals in mix. 6. Completely thaw mix prior to use.

7. Mix bag drawn against adapter. 7. Assure bag is clear of pick-up tube.

8. Foreign objects in mix. 8. Clear blockage. Use fresh mix.

9. Check valve is backwards. 9. Observe ﬂ ow arrow for proper orientation.

1. Overrun setting too low. 1. Increase overrun setting.

2. Air leak. 2. Tighten all hose clamps.

3. Air compressor not pumping air. 3. Contact local Stoelting Distributor.

4. Air check valve in backwards. 4. Check arrow for direction of ﬂ ow.

2. Disconnect pump from power source. Remove four cover/clamp thumb screws. Separate cover/clamp halves and remove outer half. Remove jammed hose. Clean and re-install cover/clamp and tighten four thumb screws securely. Allow motor thermal overload to reset.

4. Reposition/replace mix pump hose. See Section 4.9

5. Connect mix pump hose to machine.

PROBLEM POSSIBLE CAUSE REMEDY

Overrun too high.

Replacement mix pump hose won’t feed through pump.

Air exiting mix pickup hose.

Dispensed product air “pops”

Mix leakage from pump.

1. Mix pump hose service life is exceeded.

2. Out of mix. 2. Replenish mix supply.

3. Overrun setting too high. 3. Decrease overrun setting.

4. Pick-up leg of mix pump hose is collapsing.

1. Feeding hose into discharge hole of mix pump cover.

2. Hose ends not cut squarely. 2. Carefully cut hose end off squarely (no tails).

3. Force feeding too quickly. 3. Gently and slowly assist feeding of hose up

4. Pump motor not running. 4. Turn on motor switch.

1. Pickup tube check valve missing. 1. Contact local Stoelting Distributor.

1. Overrun setting too high. 1. Decrease overrun setting.

2. Mix pump hose service life is exceeded.

3. Overdrawing the machine’s capacity. 3. Reduce dispense rate.

4. Recent low mix condition. 4. Open spigot fully and allow excess air to

CAUTION: To prevent mix pump damage from dried mix deposits, immediately disassemble and clean pump.

1. Mix pump hose service life is exceeded.

NOTE: THE ACTION OF THE AIR COMPRESSOR ROCKING ARM CREATES A REPETITIVE CLICKING SOUND DURING OPERATION. THIS IS NORMAL.

1. Reposition/replace mix pump hose.

4. Reposition hose.

1. Feed hose into suction side of cover.

into pick-up hose side of cover.

2. Reposition/replace mix pump hose.

escape.

1 Remove mix pump hose. Disconnect pump

from power source. Remove mix pump cover/ clamp. Clean the rollers a small amount of soapy water. Clean mix from pump. See Section 4.2 for hose replacement.

Pump is noisy/ squeaking.

Mix in air hoses.

NOTE: THE PERISTALTIC MIX PUMP HAS THREE SQUEEZE ROLLERS WHICH USE SELF LUBRICATING BEARINGS. IF SQUEAKING EXISTS WITH THE MIX PUMP HOSE IN PLACE, AND STOPS WITH THE HOSE REMOVED, THE SQUEEZE ROLLER BEARINGS CAN BE LUBRICATED USING A SILICONE BASED SPRAY. REMOVE THE MIX PUMP HOSE. DISCONNECT PUMP FROM ELECTRICAL POWER. REMOVE FOUR COVER/ CLAMP THUMBSCREWS. REMOVE ENTIRE COVER/CLAMP AS ONE UNIT. SPRAY SILICONE BASED LUBRICANT ON EACH END OF EACH SQUEEZE ROLLER. SPIN ROLLERS TO WORK LUBRICANT INTO BEARINGS. REPEAT AS NEEDED.

CAUTION: DO NOT USE CLEANING/DISSOLVING TYPE LUBRICANTS LIKE WD-

40. THESE LUBRICANTS ARE NOT BEARING FRIENDLY AND WILL ACCELERATE

BEARING WEAR.

1. Air/mix tee above black cover/clamp. 1. Air/mix tee must be below black cover/clamp.

2. Air leak. 2. Tighten all hose clamps.

3. Mix hose on wrong air/mix tee ﬁ tting. 3. Refer to diagram for correct hose connections.

4. Pressure control manifold o-ring leak. 4. Check o-ring and manifold; replace as

required.

SECTION 6

REPLACEMENT PARTS

6.1 DECALS AND MISCELLANEOUS PARTS

Part Number Description Quantity

324014 Decal - Black Arrow on White Back 324065 Decal - Water Inlet 324103 Decal - Caution Rotating Shaft 324106 Decal - Caution Electrical Wiring Materials 324107 Decal - Caution Hazardous Moving Parts 324125 Decal - Danger Electric Shock Hazard 324141 Decal - Caution Rotating Blades 324200 Decal - High Pressure Cut-Out 324208 Decal - Attention Refrigerant Leak Check 324346 Decal - Caution Hazardous Moving Parts 324477 Decal - Electrical Box - R.H. 1 324478 Decal - Electrical Box - L.H. 1 324509 Decal - Cleaning Instructions 324566 Decal - Wired According To 324584 Decal - Adequate Ventilation 3" 1 324686 Decal - Danger Automatic Start 4 324799 Decal - Pump Off / On 2 324803 Decal - Domed Stoelting Logo (Large) (Header Panel) 1 324804 Decal - Domed Stoelting Swirl (Header Panel) 1 324825 Decal - Main Freezer Power 1 324826 Decal - Cab Off 1 324827 Decal - Freezing Cylinder 2

208135 Brush - 4" x 8" x 16" (Barrel) 1 208380 Brush - 1/4" x 3" x 14" 1 208387 Brush - 1/2" x 5" x 24" 1 208465 Brush - 1" x 3-1/2" x 18" 1 208467 Brush - 3/8" x 1" x 5" 1 232734 Cap - Rosette 4 417006 Grid - Drip Tray (Metal) 1 508048 Hex Drive Anti Seize (Spline Lubricant) - 2oz. Tube 1 508135 Petro Gel - 4oz. Tube 1 624677-5 O-Ring - Spigot Extension - Black (5 Pack) 3 744273 Tray - Drip 1 2177072 Extension - Spigot - 1.5" 0 2177073 Extension - Spigot - 2.5" 3 2177074 Extension - Spigot - 3.2" 0

6.2 FRONT DOOR AND AUGER PARTS

* If you are replacing a front door without side grooves, the spigot extensions and rosette caps also need to be replaced.

Part Number Description Quantity

149003 Bushing - Front Auger Support 2 381804 Auger Flight (Has 4 per Barrel) 8 482004 Knob (Air Bleed Valve & Spigot Body Adjustment) 2 482019 Knob - Front Door (Black) 4 624520-5 O-Ring - Air Bleed Valve - Black (5 Pack) 2 624598-5 O-Ring - Outside Spigot - Black (5 Pack) 4 624614-5 O-Ring - Top & Bottom Center Spigot - Black (5 Pack) 2 624664-5 O-Ring - Middle Center Spigot - Black (5 Pack) 1 624678-5 O-Ring - Rear Seal - Black (5 Pack) 2 625133 O-Ring - Front Door - Red 2 667868 Seal - Rear Auger (Orange) 2 694200 Spring - Air Bleed Valve 2 694255 Spring - Auger Flight 8 1151859 Adapter - Rear Seal 2 2183106 Valve - Air Bleed 2 2183110 Door w/Pins 1 2202060 Auger Shaft 2 3158086 Spigot Body - Center 1 3159696 Spigot Body - Outer 2 3170644 Support - Front Auger 2

6.3 CAB TUBING ASSEMBLY

Part Number Description Quantity

264235 Clamp - Metal (1/4" ID Tubing) 10 264241 Clamp - Metal (1/2" ID Tubing) 4 264243 Clamp - Metal (3/8" ID Tubing) 4 375819 Elbow - Barbed (3/8"- 1/4") 2 376041 Tee Connector - 3-Way (Stainless) 2 558114 Mix Container Only 2 624607-5 O-Ring - Check Valve Body - Black (5 Pack) 2 694247 Spring - Cone (Cab Check Valve) 2 696152 Clip - Lock (Check Valve) 2 756067 Tubing - 1/4" ID - Clear - Air Line (25' Increments) (Per Inch) Two 7" & Two 9" 756079 Tubing - 3/8" ID - Clear - Mix Line (25' Increments) (Per Inch) Two 24" 756088 Tubing - 1/2" ID - Clear - Mix Line (25' Increments) (Per Inch) Two 6"

756204 Tubing - 1/4" ID - Pump (50' Box Only) (Per Inch) 756204-40 Tubing - 1/4" ID - Pump (Pre-Cut 40" Piece) 2 762256 Check Valve - Mix Outlet 2 1183187 Check Valve - Mix In Line 2 2177274 Clip - Retaining (Mix Probe To Cover) 2

2202059 Pick-Up Tube - Mix 2

3183101 Cover - Rear (Mix Container) 2

3183343 Cover - Front (Mix Container) 2

WARRANTY

SOFT SERVE / SHAKE FREEZERS

1. Scope:

Stoelting, LLC warrants to the first user (the “Buyer”) that the freezer cylinders, hoppers, compressors, drive

motors, speed reducers, augers and auger flights of Stoelting soft serve / shake freezers will be free from defects in materials and workmanship under normal use and proper maintenance appearing within five (5) years, and that all other components of such equipment manufactured by Stoelting will be free from defects in material and workmanship under normal use and proper maintenance appearing within twelve (12) months after the date that such equipment is originally installed.

2. Disclaimer of Other Warranties:

THIS WARRANTY IS EXCLUSIVE; AND STOELTING HEREBY DISCLAIMS ANY

IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE.

3. Remedies:

Stoelting’s sole obligations, and Buyer’s sole remedies, for any breach of this warranty shall be the repair or (at

Stoelting’s option) replacement of the affected component at Stoelting’s plant in Kiel, Wisconsin, or (again, at Stoelting’s option) refund of the purchase price of the affected equipment, and, during the first twelve (12) months of the warranty period, deinstallation/reinstallation of the affected component from/into the equipment. Those obligations/remedies are subject to the conditions that Buyer (a) signs and returns to Stoelting, upon installation, the Checklist/Warranty Registration Card for the affected equipment, (b) gives Stoelting prompt written notice of any claimed breach of warranty within the applicable warranty period, and (c) delivers the affected equipment to Stoelting or its designated service location, in its original packaging/crating, also within that period. Buyer shall bear the cost and risk of shipping to and from Stoelting’s plant or designated service location.

4. Exclusions and Limitations:

This warranty does not extend to parts, sometimes called “wear parts”, which are generally expected to

deteriorate and to require replacement as equipment is used, including as examples but not intended to be limited to o-rings, auger seals, auger support bushings and drive belts. All such parts are sold

AS IS.

Further, Stoelting shall not be responsible to provide any remedy under this warranty with respect to any component that fails by reason of negligence, abnormal use, misuse or abuse, use with parts or equipment not manufactured or supplied by Stoelting, or damage in transit.

THE REMEDIES SET FORTH IN THIS WARRANTY SHALL BE THE SOLE LIABILITY

STOELTING AND THE EXCLUSIVE REMEDY OF BUYER WITH RESPECT TO EQUIPMENT SUPPLIED BY STOELTING; AND IN NO EVENT SHALL STOELTING BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER FOR BREACH OF WARRANTY OR OTHER CONTRACT BREACH, NEGLIGENCE OR OTHER TORT, OR ON ANY STRICT LIABILITY THEORY.

January 30, 2003

721-013, Rev. 0

File: Policy Manual/Warranty softserve1

Vollrath F431 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual