Stoelting F257 Operators Manual

Model E157 / E257 / F257

SERVICE MANUAL

Manual No. 513565 Rev.2

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 Stoelting.

stoeltingfoodservice.com

Stoelting Foodservice Equipment
502 Highway 67
Kiel, WI 53042-1600
U.S.A.

Main Tel: [phone]
Fax: [phone]

Customer Service: 888.429.5920
Fax: [phone]
Email: [e-mail]

© 2014 PW Stoelting, LLC

A Few Words About Safety

Safety Information

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

This manual provides the operator with information
for the safe operation and maintenance of Stoelting
equipment. As with any machine, there are hazards
associated with their operation. For this reason safety
is emphasized throughout the manual. To highlight
specifi c safety information, the following safety defi ni-
tions 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.

NOTE (or NOTICE)

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

TABLE OF CONTENTS

SECTION DESCRIPTION PAGE

SECTION 1 INTRODUCTION .............................................................................................................. 1

1.1 Descriptions .................................................................................................................... 1

1.2 Specifications.................................................................................................................. 1

SECTION 2 INSTALLATION INSTRUCTIONS...................................................................................... 3

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

2.2 Shipment and Transit ...................................................................................................... 3

2.3 Freezer Installation.......................................................................................................... 3

2.4 Adjusting Cup Dispensers ............................................................................................... 7

SECTION 3 INITIAL SET-UP AND OPERATION ................................................................................. 9

3.1 Operator's Safety Precautions ......................................................................................... 9

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

3.3 Draining the Freezer for Disassembling and Cleaning ...................................................... 10

3.4 Disassembly and Cleaning of Freezer Parts .................................................................... 10

3.5 Sanitizing the Freezers and Freezer Parts....................................................................... 15

3.6 Assembly of Freezer ....................................................................................................... 15

3.7 Mix Information................................................................................................................ 17

3.8 Freeze Down and Operation ............................................................................................ 17

3.9 Dispensing Product ......................................................................................................... 17

3.10 Routine Cleaning ............................................................................................................. 17

3.11 Preventative Maintenance ................................................................................................ 17

3.12 Extended Storage............................................................................................................ 18

SECTION 4 DECALS AND TAGS....................................................................................................... 21

4.1 How To Order Decals and Tags ....................................................................................... 2 1

SECTION 5 REFRIGERANT COMPONENTS AND ADJUSTMENTS................................................... 23

5.1 Refrigeration System ....................................................................................................... 23

5.2 Compressor..................................................................................................................... 23

5.3 Condenser ....................................................................................................................... 23

SECTION 6 ELECTRICAL SYSTEM OPERATION AND ADJUSTMENTS ........................................... 27

6.1 24 Hour Timer.................................................................................................................. 27

6.2 Electronic Torque Control ................................................................................................ 27

SECTION 7 MAJOR COMPONENT REMOVAL AND INSTALLATION................................................. 29

7.1 Introduction ..................................................................................................................... 29

7.2 Condenser Fan Removal.................................................................................................. 29

7.3 Drive Motor Removal........................................................................................................ 29

7.4 Compressor Removal ...................................................................................................... 29

7.5 Compressor Installation ................................................................................................... 30

7.6 Drive Motor Installation .................................................................................................... 31

7.7 Condenser Fan Installation .............................................................................................. 31

SECTION 8 TROUBLESHOOTING ..................................................................................................... 33

8.1 Compressor Run Capacitor Open, Shorted, or Blown....................................................... 34

8.2 Compressor Relay Defective or Burned Out ..................................................................... 34

8.3 Compressor Starts and Runs, But Short Cycles on Overload Protector ........................... 34

8.4 Compressor Runs Continuously ...................................................................................... 34

8.5 Unit Noisy ....................................................................................................................... 34

8.6 Compressor Will Not Start............................................................................................... 34

TABLE OF CONTENTS

8.7 Compressor Will Not Start - Hums But Trips On overload Protector................................. 35

8.8 Compressor Starts, But Does Not Switch Off Of Start Windings...................................... 35

8.9 Compressor Start Capacitor Open, Shorted or Blown ...................................................... 35

8.10 Freezer Will Not Start...................................................................................................... 35

8.11 Drive Motor Overload Trips (Freezer Shuts Down When Running) .................................... 35

8.12 Compressor Will Not Run, But Drive Motor Runs ............................................................. 35

8.13 Product Dispenses Incorrectly......................................................................................... 35

8.14 Product is Too Thin ......................................................................................................... 36

8.15 Agitator Does Not Rotate................................................................................................. 36

8.16 No Ice Crystals On Initial Freeze Down ........................................................................... 36

8.17 Excessive Ice Crystals Above Divider Plate ..................................................................... 36

8.18 Spigot Leaking or Stuck .................................................................................................. 36

SECTION 9 REPLACEMENT PARTS AND REFERENCE DRAWINGS .............................................. 37

9.1 How to Order Parts.......................................................................................................... 37

9.2 Spigot Assembly Parts.................................................................................................... 37

9.3 Model E157 Parts List..................................................................................................... 39

9.4 Model E257 Parts List..................................................................................................... 41

9.5 Model F257 Parts List ..................................................................................................... 43

LIST OF ILLUSTRATIONS

Figure Title Page

1 Model E157 - Front......................................................................................................................... 2

2 Model E157 - Side.......................................................................................................................... 2

3 Model E257/F257 - Front................................................................................................................ 2

4 Model E257/F257 - Side................................................................................................................. 2

5 Adjustable Leg ............................................................................................................................... 3

6 Warning Label Locations - E157..................................................................................................... 4

7 Warning Label Locations - E257/F257 ............................................................................................ 5

8 Space & Ventilation Requirements ................................................................................................. 6

9 Electrical Plug................................................................................................................................ 6

10 Installing Drip Tray and Cover ......................................................................................................... 6

11 Adjusting Cup Dispensers .............................................................................................................. 7

12 Operating Controls ......................................................................................................................... 9

13 Remove Drip Tray and Cover........................................................................................................... 11

14 Draining Product............................................................................................................................. 11

15 Removing Spigot Assembly............................................................................................................ 12

16 Removing Spigot O-RIng from Spigot Body..................................................................................... 12

17 Cut-away View of Spigot Assembly ................................................................................................ 12

18 Removing Drive Cap and O-Ring ..................................................................................................... 13

19 Removing Sealer Ring .................................................................................................................... 13

20 Removing Agitator Assembly and Lower Bushing ........................................................................... 13

21 Removing Divider Plate from Agitator Fingers ................................................................................. 14

22 Removing Drive Shaft...................................................................................................................... 14

23 Exploded View of Divider Plate and Agitator Assembly................................................................... 14

24 Lubricating Drive Shaft.................................................................................................................... 15

25 Installing Divider Plate and Agitator Assembly................................................................................16

26 Proper Installation of Sealer Ring.................................................................................................... 16

LIST OF ILLUSTRATIONS

27 Correct and Incorrect Alignment of Vertical Center Post Guide Hole............................................... 16

28 External Parts To Be Cleaned ........................................................................................................ 19

30 Removing Compressor Terminal Cover............................................................................................ 23

31 Check Winding............................................................................................................................... 23

32 Check Winding To Ground.............................................................................................................. 23

33 Check Condenser........................................................................................................................... 24

34 Remove Cap ................................................................................................................................... 24

35 Install Gauge .................................................................................................................................. 25

36 Adjust A.X.V. ................................................................................................................................. 25

37 Filter Drier Replacement................................................................................................................. 26

38 Torque Control ................................................................................................................................27

39 Tension Spring ............................................................................................................................... 27

40 Removing Torque Control ................................................................................................................ 28

41 Fan Removal .................................................................................................................................. 29

42 Disconnect Wire............................................................................................................................. 29

43 Drive Motor Removal....................................................................................................................... 29

44 Compressor Removal ..................................................................................................................... 30

45 Install Compressor ......................................................................................................................... 30

46 Remove Filter Drier......................................................................................................................... 31

47 Tension Spring ............................................................................................................................... 31

48 Fan Installation............................................................................................................................... 31

49 Exploded View of Spigot Assembly ................................................................................................ 37

50 Model E157 Exploded View............................................................................................................ 38

51 Model E257 Exploded View............................................................................................................ 40

52 Model F257 Exploded View ............................................................................................................ 42

SECTION 1

INTRODUCTION

1.1 DESCRIPTION

Models E157/E257F257 freezers are gravity fed. The
freezers are equipped with fully automatic controls to
provide a uniform product. The freezers are designed to
operate with most neutral bases and concentrated flavors.

1.2 SPECIFICATIONS

This manual is designed to assist qualified service person­nel and operators in the installation, operation and mainte­nance of the Models E157/E257/F257 freezers.

DIMENSIONS

WEIGHT

ELECTRICAL

COMPRESSOR

COOLING

HOPPER

E157 COUNTER

MODEL FREEZER

width: 15" (38.1 cm)
depth: 29.5" (74.8 cm)
height: 34.75" (88.3 cm)

130 lbs. (58.9 kg) 140 lbs. (63.5 kg) 140 lbs. (63.5 kg)

1 Phase, 115 VAC*
1/12 HP Drive Motor

2500 BTUH**
(frozen product output)

- Approx. 11 total running
amps.

- Use 15 Amp circuit breaker

Air cooled requires minimum
3" (7.6 cm) air clearance on
sides and 1" (2.5 cm) at rear
of unit.

10 gallons (37.9 liters) 10 gallons (37.9 liters) 10 gallons (37.9 liters)

width: 15" (38.1 cm)
depth: 19.25" (48.9 cm)
height: 61.38" (156 cm)

1 Phase, 115 VAC*
1/12 HP Drive Motor

2500 BTUH**
(frozen product output)

- Approx. 11 total running
amps.

- Use 15 Amp circuit breaker

Requires unobstructed front
and 6" minimum (15.2 cm)
clearance at back of unit. No
clearance needed on side of
unit.

E257 FLOOR

MODEL FREEZER

F257 FLOOR

MODEL FREEZER

width: 15" (38.1 cm)
depth: 19.25" (48.9 cm)
height: 61.38" (156 cm)

1 Phase, 115 VAC*
1/12 HP Drive Motor

5200 BTUH**
(frozen product output)

- Approx. 9 total running
amps.

- Use 15 Amp cirucit breaker

Requires unobstructed front
and 6" minimum (15.2 cm)
clearance at back of unit. No
clearance needed on side of
unit.

* A transformer is required if voltage is over 126.5 volts or under 103 volts.
** Under normal operating conditions.

1

Figure 1

Model E157 - Front

Figure 2

Model E157 - Side

Figure 3

Model E257 - Front

NOTE: Figures in parenthesis are in centimeters.

Figure 4

Model E257 - Side

2

SECTION 2

INSTALLATION INSTRUCTIONS

2.1 SAFETY PRECAUTIONS

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

Take notice of all warning labels on the freezer (Figures 6
& 7). The labels have been put there to help 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 freezer. Labels should be checked
periodically to be sure they can be recognized as warning
labels.

If danger, warning, or caution labels are needed, indicate
the part number, type of label, location of label, and
quantity required along with your distributor.

2.2 SHIPMENT AND TRANSIT

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

With the method of packaging used, the freezer should
arrive in excellent condition. THE CARRIER IS

RESPONSIBLE FOR ALL DAMAGE IN TRANSIT,
WHETHER VISIBLE OR CONCEALED.

NOTE

Accurate leveling is necessary to insure proper
operation and correct drainage of freezer barrel.

C. The counter model freezer must be placed on a solid

level surface. Place the rubber pad furnished under the
freezer to create a seal to that surface. The counter
model freezer is air-cooled and discharges at the top.
AL LOUVERED PANELS MUST have 3" of clearance
on sides of unit, 10" of clearance at the top, and 1"
clearance at rear of unit for proper cooling.

Do not pay the freight bill until the freezer 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 10 days
and request inspection. The customer must place claim
for damages and/or shortages in shipment with the carrier.

2.3 FREEZER INSTALLATION

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

A. Uncrate the freezer.
B. The floor model freezers must be placed in a

solid level position. To level the freezer, turn the bottom
part of each leg in or out. Place a level on top of the
hopper, with the cover removed, to check whether or not
the freezer islevel (Fig. 5).

Figure 5

Adjustable Leg

3

IMPORTANT NOTICE TO OPERATOR

BEFORE INSTALLING EQUIPMENT, READ THE OWNER'S MANUAL CAREFULLY. TAKE NOTE OF ALL INSTRUCTIONS AND CAUTION
DECALS ON THIS EQUIPMENT.

GO OVER THE MANUAL THOROUGHLY AND POINT OUT ALL DECALS TO YOUR EMPLOYEES, SO THEY UNDERSTAND HOW TO SAFELY
OPERATE THIS EQUIPMENT.

DO NOT REMOVE, DEFACE, OR PAINT OVER ANY DECALS. THEY ARE THERE FOR YOUR SAFETY.













(Behind Sani-tray)

CAUTION

THIS DEVICE MUST BE PLUGGED INTO A PROPERLY GROUNDED
RECEPTACLE TO PREVENT ELECTRICAL SHOCK HAZARD.

TAMPERING WITH THE PLUG OR USING VOLTAGES OTHER THAN
THE SPECIFICATIONS ON I.D. PLATE WILL VOID YOUR WARRANTY.

REFER TO OWNER'S MANUAL FOR INSTALLATION
INSTRUCTIONS.

723529

Warning Label Locations - E157

(Behind Sani-tray)

Figure 6

4

IMPORTANT NOTICE TO OPERATOR

BEFORE INSTALLING EQUIPMENT, READ THE OWNER'S MANUAL CAREFULLY. TAKE NOTE OF ALL INSTRUCTIONS AND CAUTION
DECALS ON THIS EQUIPMENT.

GO OVER THE MANUAL THOROUGHLY AND POINT OUT ALL DECALS TO YOUR EMPLOYEES, SO THEY UNDERSTAND HOW TO SAFELY
OPERATE THIS EQUIPMENT.

DO NOT REMOVE, DEFACE, OR PAINT OVER ANY DECALS. THEY ARE THERE FOR YOUR SAFETY.

(Affixed to condenser shroud)

THIS DEVICE MUST BE PLUGGED INTO A PROPERLY GROUNDED
RECEPTACLE TO PREVENT ELECTRICAL SHOCK HAZARD.

TAMPERING WITH THE PLUG OR USING VOLTAGES OTHER THAN THE
SPECIFICATIONS ON I.D. PLATE WILL VOID YOUR WARRANTY.

REFER TO OWNER'S MANUAL FOR INSTALLATION
INSTRUCTIONS.

723529

Warning Label Locations - E257

CAUTION







Figure 7

5

(Affixed to condenser shroud)







D. The floor model freezers are equipped with air-cooled

condensers and require correct ventilation. The front of
the freezer is the air intake and must be unobstructed.
Air discharges out of the rear of the unit. Do not obstruct
the discharge. Allow a 6" (15.2 cm) clearance behind
the unit (Fig. 8).

CAUTION
FAILURE TO PROVIDE ADEQUATE VENTILATION WILL
VOID WARRANTY!

CAUTION

DO NOT ALTER OR DEFORM PLUG IN ANY WAY!

Figure 9

Electrical Plug

G. Install the drip tray support, drip tray, drip tray grid,

cover and miscellaneous parts on the freezer. (Fig. 10)

Figure 8

Space and Ventilation Requirements

E. Place the ON-OFF-STIR ONLY toggle switch in the

OFF position. This switch is located on the lower left of
the freezer, under the drip tray and cover.

F. Connect the power cord. The plug is designed for 115

volt/15 amp duty. The unit must be connected to a
properly grounded receptacle. The electrical cord
furnished as part of the freezer has a three prong
grounding type plug (Fig.9). The use of an extension
cord is not recommended. If one must be used, use one
with a wire, size 12 gauge or heavier, with a ground. Do
not use an adaptor to avoid grounding equipment.

Figure 10

Installing Drip Tray and Cover

6

2.4 ADJUSTING CUP DISPENSERS

To adjust the cup dispensers, install the size cup desired
into the dispenser and turn the wing nuts on the dispenser
mounting bracket until enough tension is applied to the rim
of the cup to keep it from dropping out (Fig. 11). Do not over­tighten the wing nuts.

WING NUTS

Figure 11

Adjusting Cup Dispensers

7

8

SECTION 3

INITIAL SET-UP AND OPERATION

3.1 OPERATOR'S SAFETY PRECAUTIONS

A. Know the freezer. Read and understand the Operating

Instructions.
B. Notice all warning labels on the freezer.
C. Wear proper clothing. Avoid loose fitting garments,

and remove watches, rings or jewelry which could

cause a serious accident.
D. Maintain a clean work area. Avoid accidents by

cleaning up 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 cord for maintenance. Never

attempt to repair or perform maintenance on the

freezer until the main electrical power has been

disconnected.

G. Do not operate under unsafe operating conditions.

Never operate the freezer if unusual or excessive
noise or vibration occurs.

3.2 OPERATING CONTROLS AND INDICATORS

Before operating the freezer, it is required that the operator
know the function of each operating control and indicator.
Refer to Figure 12 for the locations of the operating controls
and indicators.

WARNING
THE STIRRING ONLY-OFF-STIRRING & FREEZING
SWITCH MUST BE PLACED IN THE OFF POSITION
WHEN DISASSEMBLING FOR CLEANING OR SERVIC­ING. THE FREEZER MUST BE DISCONNECTED FROM
ELECTRICAL SUPPLY BEFORE REMOVING ANY AC­CESS PANELS. ONLY A QUALIFIED SERVICE TECH­NICIAN MAY REMOVE ACCESS PANELS.

STIRRING ONLY-OFF­STIRRING & FREEZING
TOGGLE SWITCH

RESET
SWITCH

24 HR TIMER
BATTERY BACKUP

Figure 12

Operating Controls

9

HIGH PRESSURE MANUAL
RESET SWITCH

A. STIRRING ONLY-OFF-STIRRING & FREEZING

SWITCH
The STIRRING ONLY-OFF-STIRRING & FREEZ­ING switch is a three-position toggle switch used to
control the operation of the refrigeration system and
agitator. When the switch is placed in the STIR­RING ONLY position, the refrigeration system will
be off and the agitator will rotate for cleaning, or if
stirring is required when the store is closed. When the
switch is placed in the OFF position, the refrigeration
system and agitator will be off. The switch should be
placed in the STIRRING & FREEZING position for
normal operation.

B. RESET SWITCH

The reset switch is a two-position breaker switch. This
switch is used to protect the freezer from mechanical
damage. The switch must be in the NORMAL
OPERATING POSITION (up) before the freezer will
operate.

Any time a condition occurs which causes the
agitator drive motor to draw excessive current, the
reset switch will automatically switch to the
OVERLOAD CUT-OUT FREEZER NOT OPERAT­ING position. This will shut down the freezing and
agitation action of the freezer to protect the agitator
drive motor from burning out.

Should the reset switch ever trip out, move
the STIRRING ONLY-OFF-STIRRING & FREEZ­ING toggle switch to the STIRRING ONLY position.
Then move the reset switch back to NORMAL
OPERATING POSITION (up) and allow the freezer
to stir, without refrigeration, for five minutes. After
five minutes of stirring, return the STIRRING
ONLY-OFF-STIRRING & FREEZING switch to the
STIRRING & FREEZING position.

C. 24 HOUR TIMER

To program the timer, rotate program disc in the
direction of the arrows to align the correct day/time
with the time of day mark. Then pull out for Off time
or push in for On time. Each actuator is equivalent
to 15 minutes time. Check for AM/PM centered
between 12 and 12 on rotating disc. At a 6:00 setting the
indicator will point to AM or PM.

D. HIGH PRESSURE MANUAL RESET SWITCH

The HIGH PRESSURE MANUAL RESET SWITCH is a
safety switch designed to protect the compressor from
damage due to excessive head pressure. When tripped,
the lever will be out; push to reset.

E. SPIGOT ASSEMBLY

Dispensing of frozen mix is done by the SPIGOT
ASSEMBLY. By pulling the spigot plunger out, mix
in the form of ice crystals is dispensed through the
port on the bottom of the SPIGOT ASSEMBLY. To
stop dispensing, push the spigot plunger in.

F. FLAVOR BOTTLES

The FLAVOR BOTTLES are operated by a spring
loaded, push-button pump. By pushing down, 1/4
ounce (7.39 ml) of flavor is dispensed.

3.3 DRAINING THE FREEZER FOR DISASSEMBLING
AND CLEANING

After installation and initial set-up, the freezer exterior
must be cleaned and the freezer parts must be disas­sembled, cleaned and sanitized. Cleaning and sanitizing
MUST be done before the initial freeze down and operation.

Subsequent cleaning and sanitizing, after the freezer has
been operated and product has been dispensed, will
require the freezer to be completely drained of all unused
mix. Perform the following steps to drain the freezer of any
unused mix:

A. Set the STIRRING ONLY-OFF-STIRRING &

FREEZING switch to the STIRRING ONLY position
well in advance of cleaning and sanitizing to assure
complete defrosting and draining of the product
cylinder.

B. While the freezer is in the STIRRING ONLY mode,

remove the unused flavoring from the flavor bottles.
All unused flavoring should be poured into the
containers from which they came.

C. Remove the Sani-tray and cover by gently pushing

up to disengage from the support pins and pulling
out and down (Fig. 13).

D. With a bucket placed below the drain spigot, pull the

spigot to dispense (Fig. 14).

E. When liquid product is completely drained, empty

the bucket into the sink. Any remaining ice can be
removed by circulating warm water through barrel.

3.4 DISASSEMBLY AND CLEANING OF FREEZER

PARTS

CAUTION
PLACE THE ON-OFF-STIR ONLY SWITCH IN THE OFF
POSITION AND DISCONNECT THE FREEZER FROM
ELECTRICAL SUPPLY SOURCE BEFORE SERVICING
OR CLEANING.

10

Figure 13

Removing Drip Tray and Cover

Inspection for worn or broken parts should be made during
every disassembly of the freezer for cleaning or other
purposes. All worn or broken parts should be replaced to
ensure safety to both the operator and the customer, and
to maintain good freezer performance as well as a quality
product.

NOTE
Frequency of cleaning MUST comply with local health
regulations.

The exterior of the freezer must be kept clean at all times
to preserve the luster of the stainless steel. A mild alkaline
cleanser is recommended. Use a soft cloth or sponge to
apply the cleanser.

NOTE
Do not use acid cleaners, strong caustic compounds
or abrasive materials to clean any plastic or stainless
steel parts of the freezer exterior.

A. Remove the dispensers from the side of the freezer

by pulling straight up. Clean the cup dispensers
and dispenser lids with a mild alkaline cleanser and
soft cloth or sponge.

B. Remove the drip tray support, drip tray, drip tray grid by

lifting up and out. Clean the drip tray parts in the same
manner as the cup dispenser.

Figure 14

Draining Product

C. Remove the two-piece cover and mix level probe

assembly and clean.

D. Remove the flavor pumps from the bottles and

pump warm soapy water through them. Then clean
the bottles and pumps normally.

E. To remove the upper and lower spigot assemblies,

remove the retaining clip and pull the spigot assem­blies straight out of the product outlet (Fig.15).

11

Figure 15

Removing Spigot Assembly

Figure 16

Removing Spigot O-Ring from Spigot body

O-RING

SPLASH DEFLECTOR
FOR SPIGOT

SHAFT & PLUG
ASSEMBLY

Cut-away View of Spigot Assembly

SPRING

RETAINER CAP FOR
SPIGOT VALVE

Figure 17

12

SHAFT
SPACER

KNOB

1. With a clean, dry towel, wipe excess lubricant from the
spigot assembly and O-ring. Firmly grasp the spigot
assembly with both hands and squeeze the O-ring
upward (Fig 16). When a loop is formed, roll the O-ring
out of the groove toward the end of the spigot assembly.
(See Fig. 17 for a cutaway view of the spigot assembly.)

CAUTION
DO NOT USE ANY TYPE OF SHARP OBJECT TO
REMOVE ANY O-RINGS.

2. Place all loose parts in a pan or container and take

them to the wash sink, filled with warm, soapy water, for
cleaning.

3. Wash the product outlet with warm soapy water

using the brush provided.

G. For removal and disassembly of the divider plate

and agitator assembly, refer to the following steps:

WARNING
PLACE THE ON-OFF-STIR ONLY SWITCH IN THE OFF
POSITION AND DISCONNECT THE FREEZER
FROM ELECTRICAL SUPPLY SOURCE.

1. Remove the drive cap and O-ring from the agitator

tube (Fig.18).

Figure 19

Removing Sealer Ring

3. To remove the divider plate and agitator assembly, the
divider plate must be first rotated counterclockwise to
unlock and lift out of the product cylinder.

4. Once the divider plate and agitator assembly are
lifted off the vertical product cylinder center post and
out of the product cylinder, remove the divider plate
assembly and anti-lift disc. Remove the plastic
agitator bushing from the bottom of the product
cylinder center post by lifting up and out of the
product cylinder (Fig. 20). - Refer to Figure 23 for an
exploded view.

Figure 18

Removing Drive Cap and O-Ring

2. Remove the sealer ring by squeezing the looped
section and lifting out of the product cylinder (Fig. 19).

Figure 20

Removing Agitator Assembly and Lower Bushing

13

5. Unscrew the divider plate from the agitator fingers
and remove (Fig.21).

Figure 21

Removing Divider Plate from Agitator Fingers

6. Remove the drive shaft by pulling straight up and
out of the vertical center post (Fig.22).

Figure 22

Removing Drive Shaft

Figure 23

Exploded View of Divider Plate and Agitator

Assembly

7. Place all loose parts in a pan or container and take
them to the wash sink, filled with warm, soapy
water, for cleaning.

CAUTION
DO NOT DAMAGE PARTS BY DROPPING OR ROUGH
HANDLING.

NOTE
Do not attempt to wash the inside of the vertical
product cylinder center post.

8. Wash the inside of the product cylinder with warm,

soapy water, using the brush provided.

14

3.5 SANITIZING THE FREEZER AND FREEZER
PARTS

After the freezer parts have been soaked and washed in
warm, soapy water, they should be rinsed thoroughly in
clean water.

All parts must be sanitized before assembling with a
USDA certified food grade sanitizing solution (50 parts per
million of free available chlorine or equivalent is accept­able).

A. Mix a sanitizing solution of 50 parts per million to

sanitize all loose parts before assembling.

When sanitizing the freezer, refer to local sanitary regula­tions for applicable codes and recommended disinfecting
products and procedures. The frequency of sanitizing
must comply with local health regulations.

CAUTION
PROLONGED CONTACT OF SANITIZING SOLUTION
WITH FREEZER MAY CAUSE CORROSION OF STAIN­LESS STEEL PARTS.

3.6 ASSEMBLY OF FREEZER

To assemble the freezer and freezer parts, refer to the
following steps:

B. Place all loose parts in this solution, then remove

and let air dry.

C. Using this sanitizing solution and the brushes pro-

vided, sanitize the product cylinder and product
outlet by dipping the brush in the sanitizing solution
and scrubbing these areas.

D. After assembling the freezer (Section 3.6), mix approx-

imately 3 gallons (11.3 liters) of sanitizing solution and
pour into the product cylinder. Brush the walls of the
cylinder above the divider plate, with brushes provided
to sanitize this reservoir area.

E. Set the STIRRING ONLY-OFF-STIRRING &

FREEZING switch in the STIRRING ONLY position
and allow to stir for five minutes. Drain the solution
in the same manner as draining the product.

F. Pour approximately one pint (1/2 liter) of mixed

neutral base into the product cylinder. Wait one minute,
then drain the neutral base and remaining sanitizing
solution through the drain spigot.

Sanitizing must be done after the freezer is clean and just
before the product cylinder is filled with mixed neutral
base. Sanitizing the night before is not effective. However,
you should always clean the freezer and parts after use.

NOTE
Petro-Gel sanitary lubricant or equivalent must be
used when lubrication of parts is specified.

The United States Department of Agriculture and the
Food and Drug Administration require that lubricants
used on food processing equipment be certified for
this use. Use lubricants only in accordance with
manufacturers instructions.

A. Assemble the divider plate and agitator
assembly as follows:

1.Before installing the drive shaft, lubricate the
bottom with Petro-Gel or any other type of sanitary
lubricant. Enough lubricant must be applied to
create approximately a 1/8 inch bulge at the
bottom of the drive shaft (Fig.24).

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 CERTIFIED FOR THIS USE.

PETRO-GEL

Figure 24. Lubricating Drive Shaft

15

2. Install the drive shaft into the center post by

rotating and pressing down lightly on the shaft until
the shaft drops down and engages with the gear
box shaft.

3. Replace the plastic lower bushing to the bottom of

the vertical center post.

4. Assemble the divider plate to the stationary fingers.

5. Assemble the anti-lift disc onto the agitator

(See Fig.23).

6. Slide the divider plate down from the top of the

agitator tube, until it is seated properly, allowing the
agitator fingers clearance for rotation.

BACK

7. Assemble the divider plate and agitator assembly

onto the vertical center post, making sure the
indicator arrow on the divider plate is in position to
line up with the upper spigot. Grasp the agitator
tube and slide the assembly down the vertical
center post and lock (Fig. 25).

Figure 26

Proper Installation of Sealer Ring

9. Roll the agitator tube "O"-Ring completely down
the agitator tube until it seals tightly to the divider
plate.

10.Rotate the agitator tube clockwise until the guide hole
at the top of the agitator tube forms a complete circle
with the hole at the top of the vertical center post
(Fig.27).

Figure 25

Installing Divider Plate and Agitator Assembly

8. Install the sealer ring by squeezing the looped
section and sliding down into the product cylinder.

NOTE
For proper operation of the freezer, the looped
section of the sealer ring MUST be positioned to the
back of the product cylinder (Fig.26).

Figure 27

Correct and Incorrect Alignment

of Vertical Center Post Guide Hole

11. Assemble the drive cap onto the agitator tube, aligning
the guide pin in the drive cap with the guide hole in
the vertical center post and pressing down.

16

B. Assemble O-rings onto the spigot plungers

without lubricant. Then apply a thin film of
sanitary lubricant to the exposed surfaces of the
O-rings.

1. Insert the spigot assembly into the product outlet.

2. Slide the spigot retaining clip into position.

C. Assemble the flavor bottles as follows:

3.8 FREEZE DOWN AND OPERATION

A. With mixed neutral base in the product cylinder,

start the freezing process by setting the STIRRING
ONLY-OFF-STIRRING & FREEZING switch in the
STIRRING & FREEZING position.

B. Although servable product can be obtained after the

freezer has been run for 1 hour, the best quality ice
crystals will develop after the freezer has been
running for several more hours.

1. Replace the bottles in the flavor rack.
D. Install sani-tray and cover.
E. Replace the cup dispensers on the side of the

freezer by positioning the bracket on the dispenser
above the bracket on the side of the freezer and sliding
down.

3.7 MIX INFORMATION

It is essential to follow the mixing instructions on the
neutral base container carefully. The concentration of
ingredients in the product, which determines the "Brix"
(sugar level), is very important to the operation of the
freezer and the quality of the drink. When the proper
amount of neutral base is mixed with the proper amount of
water, the mixture should have a "Brix" reading between 11
and 13.

CAUTION
DO NOT POUR THE INDIVIDUAL INGREDIENTS (WA­TER OR NEUTRAL BASE) DIRECTLY INTO THE FREEZER
AND DEPEND ON THE AGITATOR TO DO THE MIXING.
THIS DOES NOT PROVIDE FOR ADEQUATE MIXING
AND MAY CAUSE DAMAGE TO THE FREEZER.

Refer to the following steps for filling the freezer:
A. Follow instructions on neutral base containers to mix

neutral base with water. Then pour into the freezer.

B. The product cylinder has a 10 gallon capacity, when

filled approximately 1" (2.54 cm) from the top of the
cylinder. When filling the cylinder, it is necessary to
remove all trapped air from below the divider plate.

Fill the product cylinder with mix to within 1" (2.54 cm)
from the top. Place a sanitary container under the
serving spigot and dispense small amounts of liquid by
pulling out and pushing in the spigot in a series of short
bursts. Each time the spigot is closed, bubbles will rise
to the top of the liquid in the product cylinder. When no
morebubbles rise to the top, the air trapped under the
divider plate has been removed. Pour the contents of the
container back into the product cylinder.

3.9 DISPENSING PRODUCT

To dispense product correctly, refer to the following steps:
A. Select the desired cup size.
B. Dispense flavor concentrate into the cup first, by

pushing the flavor pump down. Use one squirt of
flavor for small cups, two squirts for medium cups and

three squirts for large cups.
C. Place cup under and against the spigot.
D. Pull the spigot out.
E. Fill the cup. The gravity flow from the spigot will

automatically mix the flavor concentrate with the

neutral base mixture as it is dispensed.
F. When the cup is full, push the spigot in.

3.10 ROUTINE CLEANING

To remove spilled or dried mix from the freezer exterior,
simply wash in the direction of the finish with warm soapy
water or a mild alkaline cleanser and a soft cloth or sponge.
Do not use abrasive materials as they will mar the finish of
the freezer.

Refer to Figure 28 for all external parts of the freezer to be
cleaned.

3.11 PREVENTATIVE MAINTENANCE

It is recommended that the following maintenance sched­ule be followed to keep the freezer clean and operating
properly.

CAUTION
NEVER ATTEMPT TO REPAIR OR PERFORM MAINTE­NANCE ON THE FREEZER UNTIL THE MAIN ELECTRI­CAL POWER HAS BEEN DISCONNECTED.

17

A. DAILY

1. The exterior should be kept clean at all times to
preserve the lustre of the stainless steel. A mild
alkaline cleanser is recommended. Use a soft
cloth or sponge to apply the cleanser.

CAUTION
DO NOT USE ACID CLEANERS, STRONG CAUSTIC
COMPOUNDS OR ABRASIVE MATERIALS TO CLEAN
ANY PART OF THE FREEZER EXTERIOR OR PLASTIC
PARTS.

2. Clean the sani-tray by lifting up,out,and rinsing and

replacing.

3.12 EXTENDED STORAGE

Refer to the following steps for storage of the freezer over
any long period of time:

A. Place the STIRRING ONLY-OFF-STIRRING &

FREEZING switch in the OFF position.

B. Disconnect (unplug) the freezer from the electrical

supply source.

C. With a warm detergent solution, thoroughly clean all

parts that come in contact with neutral base mix or
flavors. Rinse in clear water and dry all parts. Do not
sanitize.

B. WEEKLY

1. Remove the sani-tray and cover. Clean behind the

drip tray with a soap solution.

2.Check all "O" Rings for excessive wear and replace if

necessary.

C. MONTHLY

CAUTION
THE FREEZER HAS AN AIR COOLED CONDENSER AND
MUST HAVE PROPER AIR CIRCULATION.

DO NOT PLACE THE E257 FLOOR MODEL FREEZER
ANY CLOSER THAN SIX (6) INCHES (15.2 CM) FROM
THE WALL.

THE COUNTER MODEL FREEZER REQUIRES A 3" (7.6
CM) CLEARANCE ON THE SIDES, A 1" (2.5CM) CLEAR­ANCE AT THE REAR, AND A 10" (25.4 CM) CLEARANCE
AT THE TOP.

FAILURE TO CLEAN THE CONDENSER FILTER MAY
RESULT IN SERIOUS FREEZER DAMAGE AND COULD
VOID THE WARRANTY.

NOTE
Do not let cleaning solution or products stand in the
product cylinder during shutdown period.

D. Remove, disassemble and clean the spigot assem-

blies and lower bushing. Place these parts in a
plastic bag with a moist paper towel to prevent them
from becoming brittle.

CONDENSER CLEANING

1. For the floor models, remove the sani-tray and
insert. Remove the two phillips head screws from
the lower front panel and pull panel down and out.
Blow the dirt out from the opposite side of the
condenser using an air tank, CO-2 tank, or vacuum.

2. For the counter model, remove the six phillips head
screws from the back panel. Then clean the con­denser using the same method as on the floor model.

18

LIQUID LEVEL INDICATOR

CUP DISPENSERS AND LIDS

COVERS

FLAVOR BOTTLES

DRIP TRAY SUPPORT, DRIP
TRAY, DRIP TRAY GRID

ALL PANELS

Figure 28

External Parts To Be Cleaned

19

20

SECTION 4

DECALS AND TAGS

4.1 HOW TO ORDER DECALS AND TAGS

To assure receipt of the proper warning decals, supply your dealer or distributor with the following information:
A. Model number of equipment.

B. Serial number of model, stamped on nameplate.
C. Part number, decal description and quantity needed. Common warning decal names and numbers are

listed below.

DECALS AND TAGS F O R

MODELS E157/E257/F257

PART NUMBER DESCRIPTION

324105 DECAL CAUTION: ELEC TRIC SHO CK
324107 DECAL CAUTION: MOVING PARTS
324113 DECAL CAUTION: GROUNDED PLUG
324135 DECAL TOGGLE & SAFETY SWITCH
324200 DECAL MAN U AL R ESET
324393 DECAL S T OELTI NG SWIRL
324548 DECAL ADEQUATE VENTILATION - E257/F257 Floor Model

324585 DECAL REFRIGERATION CHARGE

324649 DECAL ADEQUATE VENTILATION - E157 - Counter Model

723516 TAG ATTN: SET TIMER

723526 TAG READ MANUAL

723529 TAG CAUTION
723537 TAG SANITARY CLEAN

21

22

SECTION 5

REFRIGERANT COMPONENTS AND ADJUSTMENTS

5.1 REFRIGERATION SYSTEM

This section is intended to provide qualified refrigeration
technicians with a general understanding of the refrigera­tion system, it's components and adjustments. It is recom­mended that any work done on the freezer be performed by
a qualified refrigeration technician.

5.2 COMPRESSOR

A. Winding Test

To test the compressor motor windings for possible prob­lems, perform the following steps:

W ARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPL Y BEFORE SERVICING.

ÅÅ

Å

ÅÅ

ËË

Ë

ËË

Volt Ohm

Meter Leads

1. Remove the two Philips head screws from the
bottom of the back panel and slide the side panel
down, back and out.

2. Remove the compressor terminal cover by insert­ing a standard screwdriver under the terminal
cover and retaining frame, pry out side then hold
with your hand while prying the other side. (Figure

30)

Figure 31. Check Windings

NOTE

Check your compressor handbook for proper val­ues. (Available from compressor manufacturer. )

7. To check if windings are shorted to ground, con­nect one ohmmeter lead to a bare metal part on the
compressor and check terminals C, R, and S.
(Fig. 32)

ÇÇ

Ç

ÇÇ

Volt Ohm

Meter Leads

ËË

Ë

ËË

Figure 30. Removing Compressor Terminal Cover

3. Remove retaining clip and cover.

4. Remove the three wires from the compressor
terminals.

5. Set your ohmmeter at X1 and connect the ohmme­ter to terminals C and R to check resistance

through run windings. Refer to Figure 31 for com-

pressor terminals.

6. Set your ohmmeter at X1 and connect the ohmme­ter to terminals C and S to check resistance
through the start windings.

Figure 32. Check Winding to Ground

5.3 CONDENSER

The condenser is a air-cooled copper tube and aluminum
fin type. Condensing is totally dependent upon air flow. A
plugged condenser or restrictions in the louvered side
panel will restrict air flow.

23

CAUTION
AIR RESTRICTIONS WILL LOWER THE CAP AC­ITY OF THE SYSTEM AND DAMAGE THE COM­PRESSOR.

The condenser must be kept free of dirt and grease. The
freezer MUST have a minimum of 6" (15.2 cm) of ventilation
at all louvered panels for free flow of air. Make sure the
freezer is not pulling over 100°F (37°C) air from other
equipment in the area.

NOTE

Slush Freezers can not operate at temperatures over
120°F ambient.

The optional condenser filter and condenser require peri­odic cleaning. To clean, refer to the following procedures:

1. Remove the condenser filter from the lower front panel
and visually inspect for dirt. If the filter is dirty, shake or
brush excess dirt off the filter and wash in warm soapy
water. Once the filter is clean, rinse thoroughly in warm,
clean water and shake excess water out taking care not
to damage the filter in any way. Install the filter back
onto the front panel.

6. An alternative method of cleaning the condenser is to
use a condenser brush and vacuum.

NOTE

If the condenser is not kept clean, loss of refrigeration
efficiency will result, causing extended run time or inad­equate product consistency .

7. For the Model E157, remove the phillips head screws
from the back panel and remove the panel. Clean the
condenser following steps 4 - 6 above.

PRODUCT CYLINDER (EVAPORATOR)

An automatic expansion valve (A.X.V.) is used to control
the refrigerant flow to the freezing area of the product
cylinder. The adjustable A.X.V. is preset at the factory. If
the product is too thick or too thin, an A.X.V. adjustment
may be necessary.

A. A.X.V. Adjustment

To adjust the A.X.V., refer to the following procedures:

1. Remove the two philips head screws from the back side
panel and pull panel down and out (Model E257).
Remove the left side and back panel (Model E157).

2. For Model E257, remove the sani-tray and insert.
Remove the two phillips head screws from the lower
front panel and pull panel down and out.

3. Visually inspect the condenser for dirt by shining a light
through the coil from the back of the condenser (Fig.

33.)

Figure 33. Check Condenser

2. Remove the cap from the Schrader valve on the com­pressor (Fig. 34).

3. Install a 0-100 P.S.I.G. gauge onto the Schrader valve
(Fig. 35).

ÅÅ

Å Cap

ÅÅ

Figure 34. Remove Cap

4. Start the refrigeration cycle and read the pressure

NOTE

Freezer must be full of product and past initial freeze
down.

4. If the condenser is dirty, place a damp towel over the
condenser.

5. Using compressed air or CO2 tank, blow out the dirt
from the back of the condenser. Most of the dirt will cling
to the wet towel.

24

Figure 35. Install Gauge

5. Pressure gauge reading should be:

ledoM751E752E751E752E7122752F

.regirfeR

21R21R22R22R205RA404R

1. Assuming the side and rear panels have been removed,
perform the following procedures for removing the A.X.V.

Figure 36. Adjust A.X.V.

daeH

erusserP

noitcuS

erusserP

011011061061071091

eeS

eeS

trahC

trahC

woleB

33338224

woleB

6. If the pressure gauge reading does not fall within those
specifications, proceed with the following steps:

7. Remove the cap the the A.X.V. and, using a small
wrench, turn the adjusting screw 1/4 turn (90°) counter­clockwise for more cooling or 1/4 turn (90°) clockwise
for less cooling (Fig. 36.)

8. Allow the system to level out for three to five minutes
before taking another pressure reading.

9. Should the reading still not fall within specifications,
repeat steps 8 and 9 until the correct reading is
obtained.

10.Once the correct reading is obtained, replace the cap.
Remove the pressure gauge from the Schrader valve
and replace the Schrader valve cap.

11.Replace the rear panel.

B. A.X.V. Removal

WARNING
DISCONNECT FREEZER FROM ELECTRICAL SUPPL Y
SOURCE BEFORE SERVICING.

2. Recover the refrigerant charge, then leave a port open

to prevent pressure build-up during A.X.V. removal.

3. Remove foam insulation from surrounding lines.

4. Apply a heat sink (wet cloth) to the A.X.V.

5. Unsweat the A.X.V. from it s connecting lines.

6. Remove the A.X.V . with the heat sink.

C. T.X.V. Replacement

T o replace the A.X.V ., perform the following procedures:

CAUTION
WHEN REPLACING THE A.X.V., A HEAT SINK
(WET CLOTH) MUST BE USED TO PREVENT
DAMAGE TO THE V AL VE.

1. Position the A.X.V . with heat sink, so the refrigeration
line correspond with the proper valve ports.

2. Braze lines to the A.X.V . using the appropriate brazing
material.

CAUTION
IF IT IS NECESSARY T O REPLACE THE A.X.V ., A HEA T
SINK (WET CLOTH) MUST BE USED TO PREVENT
DAMAGE TO THE V AL VE.

3. Remove the heat sink from the A.X.V .

4. Replace any foam insulation to the surrounding lines.

5. Once the A.X.V . is installed, the refrigeration system
must be purged and evacuated to 50 microns of mer­cury for approximately 30 minutes.

25

6. Break the vacuum to (0 P .S.I.G .) with dry nitrogen, then
with an open port, replace the filter drier using the
appropriate brazing material. (Fig.37).

7. Once the filter drier has been replaced, repeat the
evacuation and recharging procedures.

Open

ËË

Ë

ËË

Port

Figure 37. Filter Drier Replacement

26

SECTION 6

ELECTRICAL SYSTEM OPERATION AND ADJUSTMENTS

6.1 24 HOUR TIMER

The 24 hr. timer is used to eliminate refrigeration during
non-use hours. When properly set it will prevent build-up of
large ice crystals and/or build-up of ice on the agitator. The
timer is located behind the lower front panel. To program
the timer, rotate program disc in the direction of the arrows
to align the correct time with the time of day. Then pull out
for OFF time or push in for ON time. Each actuator is
equivalent to 15 minutes. Check for AM/PM centered
between 12 and 12 on rotating disc. At a 6:00 setting, the
indicator will point to AM or PM.

6.2 ELECTRONIC TORQUE CONTROL

The electronic torque control is a time delay that controls
the operation of the compressor. The electronic torque
control operates in unison with two micro switches (ON
and OFF) and the agitator drive motor. If the control is
viewed from the back of the freezer while the freezer is
operating, the following conditions of normal operation will
be evident:

Left Hand Control
Bracket Arm

Left Hand (OFF)
Micro Switch

Ì

Right Hand Control

Å

Bracket Arm

Ê

É

Right Hand (ON)
Micro Switch

(Viewed from Back)

Figure 38. Torque Control

W ARNING
VIEWING THE FREEZER WITH ANY SIDE P ANEL RE­MOVED DURING OPERATION IS NOT RECOM­MENDED, AS THE POSSIBILITY OF ELECTRICAL
SHOCK HAZARD IS GREA TL Y INCREASED. THIS PRO­CEDURE HAS BEEN ADDED ONL Y TO CLARIFY THE
THEORY OF OPERA TION.

1. When the right hand arm of the control bracket contacts

the right hand micro switch, the compressor will start.

2. As the compressor continues to run, ice crystals are

being formed in the product cylinder. As the drive motor
torque increases due to the formation of ice crystals,
the left-hand arm of the control bracket will gradually
move to the right and contact the left-hand micro
switch. The compressor will SHUT OFF approximately
71 to 81 seconds after the arm maintains contact with
the micro switch. This prevents eratic freeze down and
rapid recycling of the compressor.

See Figure 38 for a visual description of the compo­nents involved in this operation.

A. Consistency Adjustment

The tension spring (Fig.39), located on the right side of the
freezer, is used to adjust the product consistency. To
increase product consistency, increase the spring tension
by turning the eyebolt nut clockwise one turn. To decrease
product consistency, decrease the spring tension by
turning the eyebolt nut counterclockwise one turn.

3-1/16"
3-1/8"
(3-5/8" F257)

(Viewed from Right Side)

Figure 39. Tension Spring

NOTE

The tension spring is adjusted at the factory to 3-1/8 inches,
(3-5/8 for the F257). If further adjustment is necessary,
turn the eyebolt nut one turn at a time in the desired di­rection.

B. Micro Switch Removal

Should either the right or the left micro switch be found to
be defective, either switch can be replaced by performing
the following procedures:

WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPL Y SOURCE BEFORE SER VICING .

27

1. Remove the necessary panels. Model E257 back
panel, Model E157 left side panel.

2. Using a 5/16" wrench, remove the two nuts and star
washers from the torque control mounting bracket
(Fig.40).

Remove Nuts

Ë

Ë

Figure 40. Removing T orque Control

3. Remove the torque control from the mounting bracket
by pushing the assembly toward the left side of the
freezer until the mounting studs are clear of the mount­ing bracket. Then pull the assembly down and towards
you.

4. Using a 1/4" wrench, remove the two nuts from the rear
of the defective micro switch.

5. Remove the micro switch from the mounting studs and
disconnect from the connector.

C. Micro Switch Replacement

1. Connect a serviceable micro switch to connector.

2. Install micro switch onto the mounting studs and
fasten with the two hex nuts. Tighten nuts snugly with
1/4" wrench. Do not over tighten.

3. Position torque control behind the mounting bracket
and allow the two studs to be pushed through the holes
in the mounting bracket.

4. Install the two star washers and nuts onto the mount­ing studs. Tighten nuts snugly with a 5/16" wrench. Do
not over tighten.

5. Replace the back panel.

28

SECTION 7

MAJOR COMPONENT REMOVAL AND INSTALLATION

7.1 INTRODUCTION

This section covers the removal and installation of the
condenser fan, drive motor and compressor. It is extremely
important to follow each step accurately and completely.
Failure to do so could result in further problems later.

7.2 CONDENSER FAN REMOVAL

To remove a condenser fan which has been found to be
defective, refer to the following procedures:

W ARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPL Y SOURCE BEFORE SER VICING .

1. Remove the necessary panels: Model E257 back and
side panels, Model E157 back panel and back shroud.

2. Disconnect the condenser fan lead wires.

3. Using a 5/16" nut driver or a phillips screwdriver, remove
the four fastening screws from the fan mounting brack­ets (Fig.41).

2. Disconnect the lead wire from the drive motor capacitor.

3. Disconnect the wire leading from the drive motor to the
reset switch on the front of the freezer (Fig.42),

4. Remove the three socket head cap screws securing the
mounting flange to the bearing (Fig.43). Remove the
drive motor from either side.

ÅÅ

Å Connector

ÅÅ

Figure 42. Disconnect Wire

ÉÉ

É

ÉÉ

Fastening Screws

ËË

Ë

ËË

Figure 41. Fan Removal

4. Remove the fan and its supports through the side of the
freezer taking care not to damage the fan blade.

7.3 DRIVE MOTOR REMOVAL

To remove a defective drive motor, perform the following
procedures:

W ARNING
DISCONNECT FREZER FROM ELECTRICAL
SOURCE BEFORE SERVICING.

1.Remove the necessary panels. Model E257 back and
side panels. Model E157 front sides and bottom panels.

Socket
Head
Screws

Figure 43. Drive Motor Removal

If the drive motor failure is due to a defective drive motor
mount bearing, replace the bearing assembly as follows:

1. Remove snap ring.

2. Slide bearing down and off.

3. Slide new bearing on and replace snap ring. Bearing
must turn freely when assembled.

7.4 COMPRESSOR REMOVAL

To remove a defective compressor, perform the following
procedures:

29

W ARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPL Y SOURCE BEFORE SER VICING .

7.5 COMPRESSOR INSTALLATION

To install a serviceable compressor, perform the following
procedures:

1. Remove the necessary panels. Model E257 back and
side panels. Model E157 back panel and back shroud.

2. Disconnect lead wires at the compressor.

3. Recover refrigerant charge, then leave a port open to
prevent pressure build-up during compressor removal.

4. Unsweat the suction line and discharge line from the
compressor (Fig.44).

ÇÇ

Ç

ÇÇ

ÇÇ

Ç

ÇÇ

Suction Line

Discharge
Line

WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPL Y SOURCE BEFORE SER VICING .

ASSUMING THE SIDE AND BACK P ANELS HA VE
BEEN REMOVED FOR COMPRESSOR REMOV AL
AND THE ENTIRE REFRIGERATION SYSTEM
PURGED THOROUGHLY, YOU CAN BEGIN IN­ST ALLING A NEW COMPRESSOR.

WARNING
IF ACID IS FOUND IN THE SYSTEM, CLEAN OUT
PER COMPRESSOR MANUFACTURER’S IN­STRUCTIONS.

2. Install the four rubber compressor mounts on the
replacement compressor.

3. Remove all plugs from the replacement compressor.

4. Braze the access fitting line to the correct compressor
port, using the appropriate brazing material.

5. Install the compressor into the freezer, from the left
side, fitting the base over the four mounting studs.

Figure 44. Compressor Removal

5. Remove the four nuts and four washers from the base
of the compressor.

6. Remove compressor through left side of the freezer.

7. Remove the four rubber compressor mounts from the
old compressor.

NOTE

Rubber mounts are not always furnished with re­placement compressors.

8. Unsweat the access fitting line from the compressor.

9. Check the compressor for a burn-out condition using an
acid test kit. If acid is found, clean out the system

per the compressor manufacturer’s instructions.

10.Sweat shut all open ports of the old compressor.

NOTE

A compressor returned to the company with any
open ports will void the warranty . ALW AYS plug any
open ports on a compressor that has been removed.

6. Install the four washers and four nuts onto the mounting
studs and tighten securely.

7. Leaving a port open to prevent pressure build-up, braze
the suction line and discharge line to the compressor
(Fig.45).

NOTE

Cap and valve must be removed.

Open

ËË

Ë

ËË

Port

Figure 45. Install Compressor

8. Connect the lead wires to the compressor. Replace the
terminal cover and retaining clip.

9. Evacuate the refrigeration system to 50 microns of
mercury for approximately 30 minutes.

30

10.Break the vacuum (0 P.S.I.G.) through the Schrader
valve with the dry nitrogen.

11.Leaving a port open to prevent pressure build-up,
remove the filter drier and install a new filter drier using
the appropriate brazing material (Fig.46).

ÆÆ

Filter Drier

ÆÆ

Æ

ÆÆ

Æ

ÆÆ

3-1/16"
3-1/8"
(3-5/8" F257)

Figure 47. Tension Spring

6. Replace necessary panels.

7.7 CONDENSER FAN INST ALLA TION

T o install a serviceable condenser fan, perform the follow­ing procedures:

Figure 46. Remove Filter Drier

12.Purge and evacuate the refrigeration system to 50
microns of mercury for approximately 30 minutes.

13.Accurately charge the system with the amount and
type of refrigerant indicated on the freezer Model I.D.
plate.

14.Leak check all fittings and connections.

7.6 DRIVE MOTOR INSTALLATION

To install a serviceable drive motor, perform the following
procedures:

W ARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPL Y SOURCE BEFORE SER VICING .

1. With the necessary panels removed for removal of a
defective drive motor, install the drive motor through
either side of the freezer and position mounting flange
over the bearing and line up the three holes.

2. Install the three socket head screws securing the
mounting flange to the freezer and tighten.

WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SUPPL Y SOURCE BEFORE SER VICING .

1. Assuming the necessary panels have been removed
to remove a defective condenser fan, install a new con­denser fan bracket through the side of the freezer and
align the holes in the fan brackets with the holes in the
condenser fan shroud attached to the freezer frame
(Fig.48).

ÉÉ

É

ÉÉ

Fastening Screws

ËË

Ë

ËË

3. Connect the wire leading from the drive motor to the
reset switch.

4. Connect the lead wire to the drive motor capacitor.

5. Connect tension spring and adjust to 3 1/16"-3 1/8"
(Fig.47).

Figure 48. Fan Installation

2. Using a 5/16" nut driver or a phillips head screwdriver,
install the four screws securing the fan supports to the
mounting brackets.

3. Connect the condenser fan lead wires.

31

32

SECTION 8

TROUBLESHOOTING

Troubleshooting can be difficult. The TROUBLESHOOTING INDEX on the preceding page gives a list of possible
problems. To make a repair to a problem, make reference to the cause and correction on the page indicated.

This list of problems causes and corrections will only give an indication of where a possible problem can be and what
repairs are needed. Normally, more or other repair work is needed beyond the recommendations in the list.

Remember that a problem is not normally caused by only one part, but by the relation of one part with other parts. This
list is only a guide and cannot give all possible problems and corrections. The technician must find the problem and its
source, then make the necessary repairs.

In the event the Troubleshooting Guide does not help to correct the service problem, the factory Service Department
should be contacted. Write or call:

STOELTING, INC. Tele: 920-894-2293
502 HWY. 67 800-558-5807
KIEL, WI 53042 Fax: [phone]

INDEX

DESCRIPTION PAGE

8.1 Compressor run capacitor open, shorted or blown..................................................................................35

8.2 Compressor relay defective or burned out ..............................................................................................35

8.3 Compressor starts and runs, but short cycles on overload protector ......................................................35

8.4 Compressor runs continously.................................................................................................................35

8.5 Unit Noisy ..............................................................................................................................................35

8.6 Compressor will not start .......................................................................................................................35

8.7 Compressor will not start - hums but trips on overload protector ............................................................36

8.8 Compressor starts, but does not switch off of start winding ...................................................................36

8.9 Compressor start capacitor open, shorted or blown ...............................................................................36

8.10 Freezer will not start...............................................................................................................................36

8.11 Drive motor overload trips (freezer shuts down when running).................................................................36

8.12 Compressor will not run, but drive motor runs.........................................................................................36

8.13 Product dispenses incorrectly................................................................................................................36

8.14 Product is too thin..................................................................................................................................37

8.15 Agitator does not rotate..........................................................................................................................37

8.16 No ice crystals on initial freeze down .....................................................................................................37

8.17 Excessive ice crystals above divider plate..............................................................................................37

8.18 Spigot leaking or stuck ...........................................................................................................................37

33

8.1 COMPRESSOR RUN CAPACITOR OPEN, SHORTED, OR BLOWN

CAUSE CORRECTION

Improper capacitor ........................................................... Determine correct size and replace.

Excessively high line voltage ........................................... Contact your local power company

(1 10% of rated max.)

8.2 COMPRESSOR RELAY DEFECTIVE OR BURNED OUT

Incorrect relay .................................................................. Check and replace.

Incorrect mounting angle.................................................. Remount relay in correct position.

Line voltage too high or too low ........................................ Contact your local power company .

(+/- 10%)

Excessive short cycling ................................................... Determine reason and correct.

Relay being influenced by loose vibrating mounting ......... Remount rigidly.

Incorrect run capacitor ..................................................... Replace with proper capacitor.

8.3 COMPRESSOR STARTS AND RUNS, BUT SHORT CYCLES ON OVERLOAD PROTECTOR

Low voltage to unit ........................................................... Determine reason and correct.

Overload protector defective ............................................. Replace overload.

Excessive discharge pressure ......................................... Check ventilation, restrictions in cooling medium,

restrictions in refrigeration system.

Suction pressure too high ................................................ Check for overcharge. Adjust or replace expansion valve.

Compressor too hot - return gas hot ................................ Check refrigerant charge (fix leak), add refrigerant if

necessary.

Compressor motor has a winding shorted ........................ Replace compressor.

8.4 COMPRESSOR RUNS CONTINUOUSLY

Shortage of refrigerant...................................................... Fix leak, add refrigerant.

T orque control defective.................................................... Check and replace torque control.

Mix in hopper too warm.................................................... Refrigerant mix before adding to hopper .

T ension spring on torque .................................................. Spring length should be 3-1/8" long. Adjust if necessary.

Restriction in refrigeration system.................................... Determine location and remove.

Restricted air flow to freezer ............................................ Louvered panels require 6" (15.2 cm) clearance for air

intake and 10" (25.4 cm) clearance for discharge.

Filter dirty ........................................................................ Clean or replace filter.

Fan not running................................................................ Check fan and replace if necessary .

Dirty condenser ............................................................... Clean condenser.

Mix too rich...................................................................... Take "Brix" reading. Fill with properly mixed product.

8.5 UNIT NOISY

Drive cap will not stay in place......................................... Check locking pin inside of drive shaft and slot in agitator

for excessive wear and replace if necessary.

Loose parts or mountings ................................................ Find and tighten.

Agitator drive shaft not lubricated ..................................... Lubricate agitator drive shaft.

Tubing rattles ................................................................... Reform to be free of contact.

Mix too lean..................................................................... Fill product cylinder with properly mixed neutral base.

Bent fan causing vibration ................................................ Replace fan.

Fan motor bearings worn.................................................. Replace motor.

Agitator fingers are bent................................................... Realign or replace agitator and stationary fingers.

Internal compressor spring broken ................................... Replace compressor.

Lower agitator bushing is missing .................................... Install lower bushing.

8.6 COMPRESSOR WILL NOT ST ART

Line disconnect switch open............................................ Close start or disconnect switch

Overload protector tripped ................................................ Will reset after cooling.

T orque control defective.................................................... Check and replace torque control.

Contactor defective .......................................................... Replace contactor.

Wiring improper or loose .................................................. Check wiring against diagram.

24 Hour Timer not set for compressor operation .............. Reset timer.

34

8.7 COMPRESSOR WILL NOT ST ART - HUMS BUT TRIPS ON OVERLOAD PROTECTOR

Improperly wired............................................................... Check wiring against diagram.

Low voltage to unit ........................................................... Determine reason and correct.

Start capacitor defective .................................................. Replace start capacitor.

Relay failing to close........................................................ Determine reason and correct. Replace relay if necessary.

Compressor motor has a winding open or shorted ........... Replace compressor.

Internal mechanical trouble in compressor....................... Replace compressor.

8.8 COMPRESSOR ST ARTS, BUT DOES NOT SWITCH OFF OF ST ART WINDING

Inproperly wired................................................................ Check wiring against diagram.

Low voltage to unit ........................................................... Determine reason and correct.

Excessive high discharge pressure.................................. Check for restrictions.

Compressor motor has a winding open or shorted ........... Replace compressor.

Internal mechanical trouble in compressor....................... Replace compressor.

8.9 COMPRESSOR START CAP ACITOR OPEN, SHORTED OR BLOWN

Relay failure..................................................................... Replace relay.

Prolonged operation on start cycle due to low

voltage to unit ............................................................... Determine reason and correct.

Prolonged operation on start due to improper relay .......... Replace relay.

Excessive short cycling ................................................... Determine reason and correct.

Improper capacitor ........................................................... Determine correct size and replace.

Loose wires ..................................................................... Locate and correct.

8.10 FREEZER WILL NOT ST ART

Freezer is unplugged ....................................................... Plug in freezer .

T oggle switch in OFF position.......................................... Place toggle switch in ON or STIR ONLY position.

Blown fuse or tripped circuit breaker in building ............... Check for blown fuse or tripped circuit in building & replace.

Reset switch is in the cut-out (down) position.................. Put reset switch in normal operating position (up).

ON-OFF-STIR ONL Y switch has a loose wire or

defective ....................................................................... Check, repair, or replace switch.

8.1 1 DRIVE MOTOR OVERLOAD TRIPS (FREEZER SHUTS DOWN WHEN RUNNING)

Dirty condenser ............................................................... Clean condenser.

Improper Brix readings ..................................................... Refill with product that has Brix reading between 1 1-13.

Consistency setting is too firm ........................................ Adjust tension spring.

Improper refrigerant charge .............................................. Adjust charge.

Large voltage changes ..................................................... Check supply voltage.

T orque control not stopping compressor........................... Check torque control.

8.12 COMPRESSOR WILL NOT RUN, BUT DRIVE MOTOR RUNS

Voltage is too low............................................................. Check voltage (See Nameplate).

No power to compressor .................................................. Check wire harness, terminal and switches in compressor

circuit and replace or repair.

Compressor start capacitor is defective ........................... T est capacitor and replace if necessary.

Overload protector is tripped ............................................ Check&test overload. If amps are normal, replace overload.

Compressor relay if defective ........................................... Test relay and replace if necessary.

T oggle switch is in STIR ONL Y position ........................... Place toggle switch in ON (the stirring & freezing)position.

Compressor problem........................................................ Refer to Subsections 8.1 through 8.9.

Compressor is defective ................................................... Check compressor and replace if necessary.

T orque control defective.................................................... Check and replace torque control.

24 Hour Timer not set for compressor operation .............. Reset timer.

8.13 PRODUCT DISPENSES INCORRECTL Y

Trapped air under divider plate.......................................... Remove trapped air.

Lower half of cylinder is frozen to agitator ........................ Mix too lean. Thaw and refill with correct mix.

Freezer is being overdrawn .............................................. Slow down rate of draw.

Upper half of cylinder is frozen ......................................... Mix too lean in upper cylinder. Thaw/fill with correct mix.

35

8.14 PRODUCT IS TOO THIN

Ambient temperature is above 100°F (37.7°C) ................. Move or direct hot air away from freezer.

Freezer is being overdrawn .............................................. Slow down the rate of draw.

Condenser is dirty............................................................ Clean condenser.

Fan is stuck or motor is defective .................................... Check, repair or replace.

T emperature adjusting tension spring too loose ............... Adjust tension spring.

Refrigerant is low or leaking ............................................. Check refrigerant charge. Add if necessary .

Expansion valve is defective............................................. Check, adjust or replace expansion valve.

8.15 AGITA T OR DOES NOT ROTA TE

Drive cap pin not engaged or cap missing........................ Align half-holes in drive shaft and agitator tube.

Drive motor overload tripped off ........................................ Turn freezer off for 5 minutes, then reset.

Agitator stuck or frozen.................................................... Check for locked or bent fingers. Thaw product in freezer if

frozen.

No power to drive motor ................................................... Check wire harness and switches in drive circuit and repair

or replace.

Drive motor is defective .................................................... Check and replace if necessary .

8.16 NO ICE CRYST ALS ON INITIAL FREEZE DOWN

T oggle switch in OFF or STIR ONL Y position................... Place toggle switch in the stirring & freezing position.

Reset switch is in the cut-out (down) position.................. Place reset switch in normal operating position.

Blown fuse in building or no input power to freezer........... Check for blown fuse or input power to freezer.

Broken wire, loose connection or defective switch ........... Check and test, repair or replace as necessary.

Mix too rich...................................................................... Take "Brix" reading. Fill with properly mixed product.

Fan not running................................................................ Check fan and replace if necessary .

Restricted air flow to freezer ............................................ Louvered side panel required 6" (15.2 cm) clearance for air

intake and top requires 10" (25.4 cm) clearance for

discharge.

Dirty condenser filter ........................................................ Clean filter .

Dirty condenser ............................................................... Clean condenser.

T ension spring on torque control not set correctly............ Spring length should be 3-1/16" - 3-1/8" long, 3-5/8" for

the F257. Adjust if necessary.

Micro switch on torque control defective .......................... Check and replace micro switch.

Shortage of refrigerant...................................................... Fix leak and add refrigerant.

24 Hour Timer not set for compressor operation .............. Reset timer.

8.17 EXCESSIVE ICE CRYST ALS ABOVE DIVIDER PLATE

Sealer ring not installed or installed incorrectly................ Install sealer ring correctly .

Frozen product being poured into cylinder ....................... Do Not pour frozen product into cylinder.

Lean mix ........................................................................ Drain mix. Refill with properly mixed product.

8.18 SPIGOT LEAKING OR STUCK

Spigot "O" rings defective or missing ............................... Drain mix to below spigot level. Remove spigot, clean,

replace o-rings as needed, lubricate and install.

Dried mix in spigot assembly........................................... Drain mix to below spigot level. Remove spigot retainer and

spigot. Disassemble/clean with hot water and brush. Lubri­cate, reassemble and install. Fill with liquid mix.

36

SECTION 9

REPLACEMENT PARTS AND REFERENCE DRAWINGS

The parts and wiring diagrams illustrated on the following
pages pertain to models current with the printing of this
manual.

For your convenience, a wiring diagram decal has been
affixed to the electrical box or electrical box cover for
your model.

If the wiring decal on your model is missing or has been
damaged, please contact Stoelting, Inc. Service
Department for a replacement.

9.2 SPIGOT ASSEMBLY PARTS

Ref. No. Part No. Description

1 1147688 Shaft & Plug Assembly (SM-813A)
2 1120265 Shaft Spacer
3 232002 Retainer Cap for Spigot Valve
4 624607 O-Ring
5 482024 Knob
6 694400 Spring
7 1120918 Splash Deflector for Spigot

9.1 HOW TO ORDER PARTS

To assure receipt of the proper replacement parts,
supply your dealer or distributor with the following
information:

A. Model number of equipment.
B. Serial number of model, stamped on nameplate.
C. Part number, part name and quantity needed.

Common parts names and numbers are listed in
this manual.

Figure 49. Exploded View of Spigot Assembly

37

Figure 50. Model E157 Exploded View

38

9.3 MODEL E157 PARTS LIST

282012-SV

718702

39

Figure 51. Model E257 Exploded View

40

9.4 MODEL E257 PARTS LIST

718702

41

Figure 52. Model F257 Exploded View

42

9.5 MODEL F257 PARTS LIST

282022-SV

43

44