Stoelting SO318 Operators Manual

Model SO218 / SO318

SERVICE MANUAL

Manual No. 513573 Rev.3

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

1. INTRODUCTION

1.1 Remote Possibilities ...................................................................................................................... 1

1.2 Features ........................................................................................................................................ 1

1.3 Dispenser Specifications................................................................................................................ 2

2. INSTALLATION INSTRUCTIONS

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

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

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

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

3. INITIAL SET-UP AND OPERATION

3.1 Operator's Safety Precautions........................................................................................................ 5

3.2 Operating Controls and Indicators .................................................................................................. 5

3.3 Disassembly of Freezer Parts ........................................................................................................ 5

3.4 Cleaning the Freezer Parts............................................................................................................. 6

3.5 Sanitize Freezer and Freezer Parts................................................................................................ 6

3.6 Assembly of Freezer ...................................................................................................................... 6

3.7 Sanitizing ....................................................................................................................................... 7

3.8 Initial Freeze Down and Operation .................................................................................................. 8

3.9 Removing Product .......................................................................................................................... 8

3.10 General Operation Information ....................................................................................................... 9

4. PREVENTATIVE MAINTENANCE

4.1 Routine Cleaning ............................................................................................................................ 11

4.2 Preventative Maintenance............................................................................................................... 11

4.3 Extended Storage .......................................................................................................................... 11

4.4 Consistency Adjustment ................................................................................................................ 11

5. REFRIGERATION SYSTEM

5.1 Refrigeration System...................................................................................................................... 13

5.2 Compressor ................................................................................................................................... 13

5.3 Condenser...................................................................................................................................... 14

5.4 Evaporator...................................................................................................................................... 14

5.5 Hopper ........................................................................................................................................... 16

5.6 Capillary Tube ................................................................................................................................ 18

6. ELECTRICAL

6.1 Electrical........................................................................................................................................ 19

6.2 Front Electrical Box ....................................................................................................................... 19

6.3 Compressor Electrical Box............................................................................................................. 21

6.4 Major Component Replacement ..................................................................................................... 21

7. TROUBLESHOOTING .......................................................................................................................... 27

8. REPLACEMENT PARTS INFORMATION

8.1 Ordering Parts................................................................................................................................ 29

9. REFERENCE DRAWINGS .................................................................................................................... 31

10. ACCESSORIES

10.1 Fill-o-matic II ................................................................................................................................ 45

10.2 Fill-o-matic III................................................................................................................................ 49

11. ADDENDUM .......................................................................................................................................... 53

LIST OF ILLUSTRATIONS

FIGURE TITLE PAGE

1 Model SO218/318.................................................................................................. 1

2 Dispenser Specifications ....................................................................................... 2

3 Leveling Unit .......................................................................................................... 3

4 Controls................................................................................................................. 5

5 Disassembling Freezer .......................................................................................... 6

6 Front Door and Auger Assembly............................................................................ 6

7 Rear Seal Assembly.............................................................................................. 6

8 Retainer Clip .......................................................................................................... 7

9 Consistency Control Knob ..................................................................................... 8

10 Nameplates ...........................................................................................................13

11 Compressor Terminal Cover Removal .....................................................................13

12 Compressor Connections.......................................................................................13

13 Ohm Meter Connection..........................................................................................14

14 Condenser .............................................................................................................14

15 Access Ports .........................................................................................................15

16 TXV........................................................................................................................15

17 Heat Sink ..............................................................................................................15

18 Drier.......................................................................................................................16

19 EPR & Access Port...............................................................................................16

20 EPR Valve Adjustment ..........................................................................................17

21 EPR Heat Sink ......................................................................................................17

22 Filter Drier..............................................................................................................18

23 Drier Cap. Tube Assembly.....................................................................................18

24 Electrical Panel .....................................................................................................19

25 Switch Removal ..................................................................................................... 19

26 Light Bulb Replacement.........................................................................................19

27 Safety Switch ........................................................................................................20

28 Liquid Level Control................................................................................................20

29 Pump Relay...........................................................................................................20

30 Torque Switch........................................................................................................21

31 Compressor Contactor...........................................................................................21

32 Fan Motor..............................................................................................................21

33 Condenser .............................................................................................................22

34 Electrical Wires .....................................................................................................22

35 Compressor ...........................................................................................................23

36 Torque Spring ........................................................................................................23

37 Torque Switch Bracket...........................................................................................24

38 Belt Tensioner........................................................................................................24

39 Bearing Assembly .................................................................................................24

SECTION 1

INTRODUCTION

1.1 REMOTE POSSIBILITIES

The Stoelting Optima delivers frozen drink profits by the pitcher. The Model SO218/318 is a high-volume
producer of ready-to-serve frozen cocktails or frozen neutral base for those special drink recipes. From an
extra-small space, the Optima’s compact design and high capacity output will give you extra-large profits.

1.2 FEA TURES

High Capacity

- 15-18 gallons per hour output

- Thick, stackable slush for
post-mixing

- Or, ready-to-serve pre-mixed
products

High Efficiency Evaporator/
Auger

- Stainless steel construction

- Long life auger blades

- Quiet, smooth operation

- 8 qt. freezing cylinder capacity

Figure 1. Model SO218/318

Consistency Control

- Adjustable for thick or thin
products

- Sensitive to product demand

- 24 volt control circuits

1

Dispensing Head Door

- ”No-Freeze” design prevents
blockages

- Fast dispense for quick fill of
pitchers

- Controlled dispense for drinks
by the glass

- Convenient pull-type handle

- Attractive, clear, see-thru
design

- Visible, moving product for
merchandising appeal

1.3 DISPENSER SPECIFICATIONS

Figure 2. Dispenser Specifications

Electrical Refrigeration Crated Dimensions Dimensions

208/230/60/1 HFC-404A environmentally- Width: 25" (63.5cm) Width: 17-5/8"(44.7cm)
20 amp circuit & plug friendly refrigerant Depth: 51" (129.5cm) Depth: 26-1/8"(66.4cm)
12 running amps SO318 Air-cooled or water- Height: 66" (167.6cm) Height: 63-1 1/16"(161.8cm)

cooled, self contained Weight: 410lbs.(186kg) w/casters
SO218 Air-cooled or water- Weight: 315lbs.(142.9kg)

cooled, self contained

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 completely and are thoroughly understood.

Take notice of all warning labels on the freezer. 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 address and mail to:

STOELTING, LLC

ATTENTION: Customer Service

502 Hwy. 67

Kiel, Wisconsin 53042

Figure 3. Leveling Unit

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. 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. Stoelting,

Inc. cannot make any claims against 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 freezer must be placed in a solid level position. To

level adjust casters.

C. The freezer is equipped with an air cooled condenser

and requires correct ventilation; the front is the intake
and the back is the discharge. Both front and back
require 3" clearance for proper operation.

D. Place all switches in the OFF position.

3

E. Connect the power cord. The plug is designed for 208/

230 volt/20 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. The use of an extension cord is
not recommended. If one must be used, use one with
a size 12 gauge or heavier with a ground wire. Do not
use an adaptor to get around grounding requirements.

CAUTION

DO NOT ALTER OR DEFORM PLUG IN ANY WAY!

F. Install the drip tray, cover and other miscellaneous

parts on the freezer.

2.4 INSTALLING PERMANENT WIRING

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

WARNING
DISCONNECT FREEZER FROM THE SOURCE
OF ELECTRICAL SUPPL Y BEFORE SERVICING.

A. Remove the right side panel and electrical box cover

to gain access to the power cord connection.

B. Disconnect the black and white wires from the termi-

nal block (L1 and L2). Disconnect the green ground
wire from the grounding screw.

C. Remove the strain relief connector from the bottom of

the freezer base.Remove the power cord.

D. Install permanent wiring according to local code.
E. Connect black wire to L1 on the terminal block.

Connect the white wire to L2 on the terminal block.
Connect the green or yellow and green striped
ground wire to the grounding screw.

F. Replace all panels.

4

SECTION 3

INITIAL SETUP AND OPERATION

3.1 OPERATOR'S SAFETY PRECAUTIONS

SAFE OPERA TION IS NO ACCIDENT; Observe these
rules:

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 condi

tions. 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.
Refer to Figure 4 for the location of the operating
controls on the freezer.

C. Mix Low Light

The Mix Low light will illuminate when you are low on
mix.

CAUTION
DO NOT OPERA TE FREEZER WHEN THE LOW
MIX LIGHT IS ILLUMINATED OR DAMAGE TO
THE FREEZER COULD RESULT.

D. Front Door Interlock Switch

When the front door is removed the freezer will not
run. When the front door is installed a stanless steel
peg will close the switch and the freeezer will run.

E. High Pressure Cutout Switch (water cooled only)

The high pressure cutout switch (high limit control) is
located on the lower left side. When the switch is
tripped nothing will run. Push to reset.

Pump Off/On
Switch

ËË

Ë

ËË

ÇÇ

Ç

ÇÇ

Mix Low

Light

Front Door Interlock Switch

ÇÇ

Ç

ÇÇ

ÇÇ

Ç

ÇÇ

Clean/Off/Serve

Switch

A. Pump OFF/ON Switch (Model SO318 only)

The pump OFF/ON Switch is a two position switch.
In the OFF position the pump will not run. In the ON
position the pump will run until the proper liquid level
is reached, then stop. If the hopper does not fill
completely , place the switch in the OFF position,
then back to ON to continue filling.

WARNING
THE CLEAN/OFF/SERVE 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 P ANEL.

B. CLEAN/OFF/SERVE Switch

The CLEAN/OFF/SERVE switch is a three position
toggle and refrigeration switch used to control the
operation of the agitator. When the switch is placed
in the CLEAN position, the agitator will rotate.

When the switch is placed in the OFFposition,
nothing will operate. When the switch in placed in
the SERVE position, the agitator and refrigeration
system will run until proper consistency is reached
then stop.

Figure 4. Controls

3.3 DISASSEMBL Y OF FREEZER P ARTS

CAUTION
PLACE THE CLEAN/OFF/SERVE SWITCH IN THE
OFF POSITION BEFORE DISASSEMBLING FOR
CLEANING OR SERVICING.

Inspection for worn or broken parts should be made at
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 and a quality
product. Frequency of cleaning must comply with the
local health regulations.

T o disassemble the freezer , refer to the following steps:
A. Disconnect hose from hopper cover (Model SO318

only).

B. Remove hopper cover.

5

C. Remove retaining clip and adaptor (Model SO318

only).

D. Remove the front door by turning off the knobs, and

then pull the front door off the studs.

Figure 5. Disassembling Freezer

E. Remove the spigot body from the front door bypu lling

the retaining pin out of the spigot handle. Push the
spigot body thru the bottom of the front door.

SOFT RUBBER
SURFACE

Figure 7. Rear Seal Assembly

3.4 CLEANING THE FREEZER PARTS

Place all loose parts in a pan or container and take to
the wash sink for cleaning. To clean freezer parts refer
to the following steps:

A. Place all parts in warm mild detergent water and

clean with brushes provided. Rinse all parts with
clean hot water.

DO NOT DAMAGE PARTS BY DROPPING OR
ROUGH HANDLING.

HARD CARBON
SURFACE

CAUTION

F. Remove the agitator assembly from the freezer. Pull

the agitator assembly out of the freezer barrel.

G. Keep the rear of the agitator assembly tipped up

once it is clear of the freezer barrel to avoid dropping
rear seal.

H. Remove the front agitator support bearing and the

two agitator blades.
I. Remove the rear seal assembly .
J. Wipe socket lubricant from the drive end (rear) of the

agitator with a cloth or paper towel.
K. Remove all “O” Rings.

W ARNING
DO NOT USE ANY TYPE OF SHARP OBJECT TO
REMOVE THE “O” RINGS.

B. Wash the freezer barrel with warm detergent water

and brushes provided.

C. The exterior should be kept clean at all times to

perserve the lustre of the stainless steel. A mild
alkaline cleaner is recommended. Use a soft cloth or
sponge to apply the cleaner.

D. Remove the drip tray insert and drain tray. Clean with

a soap solution. Rinse with clean hot water.

3.5 SANITIZE FREEZER AND FREEZER P ARTS

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 (7.5 liters) of 120°F 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, then remove

and let air dry .

Figure 6. Front Door and Auger Assembly

3.6 ASSEMBL Y OF FREEZER

T o assemble the freezer part s, refer to the following
steps:

NOTE

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

6

NOTE

The United Sates 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
the manufacturer’s instructions.

A. Assemble spigot “O” Rings onto parts dry , without

lubrication. Then apply a thin film of sanitary
lubrication to exposed surfaces of the “O” Rings.

K. Install hopper cover.
L. Connect mix hose to hopper cover (Model SO318

only).

3.7 SANITIZING

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

B. Assemble the rear seal assembly onto the agitator.

Be sure the “O” Ring is in place before installing
the rear seal. Do not lubricate.

C. Lubricate the agitator drive (rear) with a small

amount of white socket lubricant. A small container
of socket lubricant is shipped with the freezer.

D. Install the two plastic agitator blades onto the

agitator. Install front agit ator bearing to the door.

E. Push the auger into the freezer barrel and rotate

slowly until the agitator engages the drive socket.

F. Install the spigot body with “O” Rings into the front

door from the bottom. Push straight up until the
spigot is in place. Place the spigot handle into the
spigot and insert the retainer pin.

G. Install door “O” Ring after lubricating.
H. Install the front door on the freezer.
I. Install the knobs on the freezer studs.

CAUTION
FINGER TIGHTEN THE KNOBS EVENL Y . DO NOT
OVER-TIGHTEN KNOBS.

WARNING
THE UNITED ST ATES DEP ARTMENT OF AGRI­CUL TURE AND FOOD AND DRUG ADMINISTRA­TION REQUIRE THAT ALL CLEANING AND SANI­TIZING SOLUTIONS USED WITH FOOD PRO­CESSING EQUIPMENT BE CERTIFIED FOR THIS
USE. USE “STERA-SHEEN” OR EQUIVALENT.

When sanitizing the freezer, 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 (7.5
liters) of 120°F 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.

NOTE

Stoelting, Inc. has found that STERA-SHEEN
GREEN LABEL SANITIZER AND CLEANER does
an effective job of properly sanitizing and cleaning a
soft serve freezer. We therefore include a sample
with each new freezer. For further information read
the directions on the packet. Other products may
be as effective.

Look for the proper seal between the freezer barrel door,
“O” Ring, and front door.

J. Install hose adaptor onto hopper cover and secure

with retainer clip (SO318 only). Figure 8.

Figure 8. Retainer Clip

CAUTION
PROLONGED CONTACT OF SANITIZER WITH
FREEZER MA Y CAUSE CORROSION OF ST AIN­LESS STEEL P ARTS.

In general, sanitizing may be conducted as follows:
A. Prepare 4 gallons (15 liters) of sanitizing solution

following manufacturer’s instructions, then pour into
hopper (pump thru auto fill, SO318 only).

B. Place the CLEAN/OFF/SERVE switch in the CLEAN

position. Check for leaks around the front door seal.

C. After five minutes, open spigot to drain sanitizing

solution. When solution has drained, place the
CLEAN/OFF/SERVE switch in the OFF position.
Allow the freezer barrel to drain completely .

7

3.8 INITIAL FREEZE DOWN AND OPERA TION

This section covers the recommended operating
procedures to be followed for the safe operation of the
freezer.

A. Sanitize just prior to use.
B. Place the CLEAN/OFF/SERVE switch in the OFF

position.

D. Place the CLEAN/OFF/SERVE switch in the

SERVE position. The product will be ready to serve
in about 15 minutes.

3.9 REMOVING PRODUCT

Before disassembly, all product must be removed.
A. Open spigot and completely drain freezer.

C. With the spigot open, pour one cup of mix into the

hopper. Allow approximately 8 oz. of sanitizing
solution and mix to drain out. Close the spigot and
fill the hopper with mix.

B. Prepare not less than 3 gallons of warm detergent

water and pour into hopper (pump thru auto fill
SO318 only).

C. Use a brush to clean the hopper then completely

drain freezer.

ÊÊ

Ê

ÊÊ

Remove plug to

access consistency

adjustment screw

Figure 9. Consistency Control

8

3.10 GENERAL OPERA TION INFORMA TION

The SO218/318 is a cocktail/slush freezer . It is available in 208-230 volt, either air-cooled or water-cooled.
The air-cooled version has front-to-back airflow requiring three inches of air space in the front and back for
proper refrigeration. This unit is not supplied with a pump, however, S toelting does offer the Fill-O-Matic II
(electric) and Fill-O-Matic III (gas) pumps FOR THE SO318. This freezer is intended for use with non-dairy
products only and will produce 15-18 GPH.

1. Filling
T o fill the freezer , pour mix into hopper until full. To fill freezers with the optional Fill-O-Matic pump, connect

the pump and turn the fill switch on. This will open the solenoid valve and the freezer will begin to fill. The
liquid level control circuit is designed with a fill timer. This timer is designed to shut the compressor off if
the top level probe is not satisfied before the timer expires. If the top level probe is not satisfied before the
timer times out, it locks the compressor out and freezing will not occur, if this happens, turn the fill switch
off and then back on, this will reset the timer .

2. Operation
Once the freezer is full of mix, turn the clean-off-serve switch to the “serve” position. The drive motor will

start immediately . The compressor utilizes a 10 second delay-on-make / delay-on-break timer therefore,
the compressor will start 10 seconds later. The compressor will continue to run until the drive motor torque
switch is satisfied, then after a 10 second delay stop. The drive motor runs continuously in the “serve” or
“clean” switch positions. There is no night mode or standby mode. If product is left in the freezer overnight
we recommend to simply turn the freezer off. Do not run the freezer in “clean” overnight. Freeze down time
will typically be 6-10 minutes depending on the type of product used and the starting product temperature.

3. Pump Operation
When the mix level in the hopper drops below the bottom level probe, the solenoid valve opens and the

pump begins to fill until the top level probe is satisfied. When satisfied, the solenoid valve closes, and
pump will continue to run until shut off pressure is reached. The electric pump will run until the pressure
reaches the cut-out pressure of the pump. A gas pump will continue to run until the pressure in the mix line
equals the gas pressure of the pump. If you wish to use the product in the hopper prior to cleaning, turn the
pump off and turn the freezer fill switch off. This will disable the fill timer and allow the compressor to
continue to run. Be cautioned that once the hopper is empty , the barrel could freeze up. Only run the
freezer until the hopper is empty or damage may occur.

4. Fill Timer Operation
The timer has ten dip switches, all switches placed in the “on” position are added together to make up the

total time delay. This freezer leaves the factory with 64, 128 and 256 in the “on” position, this is a total of
448 seconds. The preset time should be enough to fill the hopper up to the top level probe. Fill time may be
dependent on what style pump is employed. The purpose of the timer is to disable the compressorif the
mix supply runs out. When the timer expires, the mix low light will illuminate. If the mix low light is
illuminated, the compressor is locked out of the electrical circuit and will not run. It may be necessary to
change the timer settings to more closely match the pumping capacity of your pump.

9

10

SECTION 4

PREVENTIVE MAINTENANCE

4.1 ROUTINE CLEANING

T o remove spilled or dried mix from the freezer exterior ,
simply wash in the direction of the finish with warm
soapy water and wipe dry . Do not use highly abrasive
materials as they will mar the finish.

4.2PREVENT ATIVE MAINTENANCE

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

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

A. Daily

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

B. Weekly

2. If the condenser is dirty, using compressed air or
CO2 tank, blow out the dirt from the fan side of the
condenser.

3. 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 soft product consistency .

4.3 EXTENDED STORAGE

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

A. Turn CLEAN/OFF/SERVE switch to the OFF

position.

B. Disconnect (unplug) from the electrical supply

source.

C. Clean thoroughly with a warm detergent all parts that

come in contact with the mix. Rinse in clear water
and dry all parts. Do not sanitize.

1. Check “O” Rings and rear seal for excessive wear
and replace if necessary.

2. Remove the drip tray and insert. Clean the drip
tray and insert and front of the freezer with a soap
solution.

C. Monthly

CAUTION
THE FREEZER HAS AN AIR COOLED CON­DENSER AND MUST HA VE PROPER AIR CIRCU­LA TION. FAILURE TO CLEAN THE CONDENSER
ON A REGULAR BASIS MAY RESULT IN SERI­OUS FREEZER DAMAGE AND COULD VOID
FREEZER WARRANTY .

1. Visually inspect the condenser for dirt by shining a
light through the coil from the fan side of the con­denser.

NOTE

Do not let the cleaning or sanitizing solution stand
in the hopper or in the freezer barrel during the shut­down period.

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

agitator parts. Place the agitator blades and the front
agitator support bearing in a plastic bag with a moist
paper towel to prevent them from becoming brittle.

4.4 CONSISTENCY ADJUSTMENT

The consistency adjustment knob is located behind the
right side panel near the back. Remove black plug to
access. T o adjust use a straight bladed screwdriver .
Turn clockwise for a thicker product and counterclock­wise for a thinner product. Allow 15-30 minutes for the
product to change consistency .

11

12

SECTION 5

REFRIGERATION SYSTEM

5.1 REFRIGERATION SYSTEM

The refrigeration system is a dual purpose system. The
system is designed to operate the hopper and the evapo­rator simultaneously at different temperatures. The sys­tem is designed for efficient use with R404A as the
refrigerant. The proper charges are indicated on the name­plate. Figure 10.

Figure 11. Compressor Terminal Cover Removal

Figure 10. Nameplate

5.2 COMPRESSOR

The compressor is designed specifically for use with
R404A.

A. Winding Test

T o test the compressor motor windings for possible
problems perform the following steps:

WARNING
DISCONNECT FREEZER FROM ELECTRICAL SUPPL Y
SOURCE BEFORE SERVICING.

1. Remove the retaining screws from the right side
panel and slide the side panel out and down.

2. Remove the compressor terminal cover by insert­ing a standard screw driver between the terminal
cover and retaining frame, pry out side then hold
with your hand while prying the other side then
remove cover. (Fig.11)

Figure 12. Compressor Connections

NOTE

The following values are for T ecumseh model
CS14K6E-PFV-235 with the compressor at or about
room temperature. For other models or brands con­sult the manufacturer's service data manual.

3. Connect ohmmeter to terminal C and R. Re­sistance through the run winding should be

1.10 ohms with the ohmmeter set at times one.
(Fig. 13)

13

Figure 13. Ohm Meter Connection

4. Connect ohmmeter to terminal C and S. Resis­tance through the start winding should be 5.94
ohms with the ohmmeter set at times one.

5. To check if windings are shorted to ground con­nect one ohmmeter lead to a bare metal part on
the compressor such as any copper line leading
to or from the compressor and checking terminals
C, R, and S.

NOTE

The compressor is equipped with an internal over­load protector. If the compressor trips the overload
check for high amperage draw.

2. Remove the retaining screws from the the right
side and back panel and slide the panels out
and down.

3. Visually inspect the condenser for dirt by shining
a light through the coil from the back (inside) of the
condenser. Figure 14.

Figure 14. Condenser

4. If the condenser is dirty, place a wet towel over the
front (outside) of the condenser.

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

5.3 CONDENSER

The air cooled condenser is a copper tube and aluminum
fin type. Condensing is totally dependent on air flow. A
plugged condenser or restrictions in the louvered grill will
restrict air flow. This will lower the capacity of the system
and damage the compressor.

The condenser must be kept clean from dirt and grease.
The freezer must have a minimum clearance of 6" at the
left and right side of the unit for free flow of air. Make sure
the freezer is not pulling over 100° F. of air in from other
equipment in the area.

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

W ARNING
DISCONNECT FREEZER FROM ELECTRICAL
SOURCE BEFORE SERVICING.

1. Remove the condenser filter by pulling straight
out to the front. Then 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, clear water
and shake dry, taking care not to damage the
filter in any way.

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 soft product consistency .

5.4 EVAPORATOR

An TXV (thermostatic expansion valve) is used to meter the
refrigerant to the evaporator. The self regulating TXV is
preset at the factory for approximately 28 PSIG at 75°F
ambient temperature.

A. TXV Adjustments

To determine whether or not the TXV is in need of adjust­ment, perform the following procedure:

WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SOURCE BEFORE SERVICING.

1. Remove the retaining screws from the bottom of
the left and right side panels and slide the panels
out and down.

14

2. Remove the cap from the low side access port
and install a 0 - 100 PSIG gauge. Figure 15

Figure 15. Access Ports

3. Plug the freezer in, start the refrigeration cycle and
read the pressure.

7. Once the 28 PSIG reading is obtained, replace the
cap on the TXV, remove the pressure gauge and
replace the low side schrader valve cap.

B. TXV Removal

CAUTION
IF THE TXV IS REPLACED THE HEA T SINK (WET
CLOTH) MUST BE USED TO PREVENT DAMAGE
TO THE V AL VE.

WARNING
DISCONNECT FREEZER FROM ELECTRICAL
SOURCE OF SUPPL Y BEFORE SERVICING.

1. Assuming the left side, right side and back panels
are removed, perform the following procedures for
removing the TXV.

2. Remove the bulb from the suction line exiting from
the evaporator.

4. The proper gauge reading should be approxi­mately 28 PSIG at 75°F. (21.1°C) Ambient tem­perature at the end of pull down. If the readings are
not within these parameters continue with the
following steps:

NOTE

Before performing the following procedures be ab­solutely certain it is necessary to adjust the TXV
and the freezer is full of cold mix.

5. Remove the cap on the TXV and using a service
wrench, turn the valve stem 1/4 (90°) turn counter
clockwise for more cooling or clockwise for less
cooling. Figure 16.

3. Recover refrigerant charge and leave a port open
to prevent pressure buildup during TXV removal.

4. Remove any insulation from the TXV and the
immediate surrounding lines.

5. Remove or push back any foam insulation from
surrounding lines.

6. Apply a heat sink (wet cloth) to the valve dome.
Figure 17.

7. Unsweat the suction line and liquid line from the
TXV and remove the TXV with heat sink.

Figure 16. TXV

6. Should the readings not reach 28 PSIG repeat
step #7 until the correct reading is obtained.

Figure 17. Heat Sink

15

C. TXV Replacement

To replace the TXV perform the following procedures:

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

1. Position the TXV with the heat sink so the liquid
and suction line correspond with the proper valve
ports. Figure 17.

2. With an open port braze the liquid line and suction
line to the TXV using the appropriate brazing
material.

3. Remove the heat sink from the TXV.

10.Triple evacuate the system. Evacuate twice to
1500 microns of mercury, break in the vacuum
each time with dry nitrogen. Then evacuate to 500
microns of mercury.

11.Recharge the system to nameplate specifications
and leak test.

5.5 HOPPER

A parallel refrigeration circuit feeds the hopper. A capillary
tube is used to meter the refrigerant to the hopper. An
E.P.R. valve (Evaporator Pressure Regulating) is used to
control the refrigerant at the outlet. The E.P.R. controls the
hopper pressure so, during heavy dispensing periods,
hopper temperatures will not drop and freeze the mix in the
hopper. The adjustable E.P.R. valve is preset at the
factory. If the hopper temperature is too cold or too warm,
an E.P.R. valve adjustment may be necessary.

4. Replace foam insulation to the surrounding lines.

5. Replace any insulation to the TXV and immediate
surrounding areas.

6. Install bulb on suction line exiting the evaporator.

NOTE

The TXV bulb should always be mounted on the top
of the horizontal line with the capillary end facing
the flow of refrigerant. Good contact between the
bulb and suction line is necessary for proper opera­tion of the valve. The bulb must also be well insu­lated.

7. Purge and evacuate the system.

8. Break the vacuum to 0 PSIG with dry nitrogen,
then open an access port.

9. Remove the dryer by unsweating the refrigeration
lines then with an open port sweat in the replace­ment dryer. Make certain the arrow points in the
direction of flow. Figure 18.

A. E.P.R. Valve Adjustment

To adjust the E.P.R. valve, refer to the following proce­dures:

1. Remove the phillips head screws from the bottom
of the right side panel and remove the side panel
by sliding out and down.

2. Remove the cap from the E.P.R. access port.
Figure 19.

Figure 18. Drier

Figure 19. EPR and Access Port

3. Install a 0-100 P.S.I.G. gauge onto the E.P.R.
access port.

4. Start the refrigeration cycle and read the pressure.

NOTE

The ideal E.P .R. valve setting (69-71 PSIG) will not allow
mix to freeze to the walls of the hopper.

5. If the pressure gauge reading does not fall
between 69-71 PSIG parameters, proceed with
the following steps:

16

6. Loosen the lock nut on the E.P .R. valve and
using a small screwdriver , turn the valve stem
1/4 (90°) turn counter clockwise for more cool
ing or clockwise for less cooling.Figure 20.

Figure 20. EPR Valve Adjustment

7. Allow the system to level out for 3 - 5 minutes
before taking another pressure reading.

2. Recover refrigerant charge and leave the port
open to prevent pressure build-up during
E.P .R. valve removal.

3. Remove foam rubber insulation from the sur­rounding lines.

4. Apply a heat sink (wet cloth) to the E.P.R.
valve. Figure 21.

8. Should the reading still not fall between 69-71
PSIG, repeat steps 6 and 7 until the correct
reading is obtained.

9. Once the 69-71 PSIG reading is obtained,
tighten the locknut snugly , remove the pressure
gauge and replace the E.P .R. access valve
cap.

10.Replace the side panel.

B. E.P.R. Removal

CAUTION
IF THE E.P.R. VALVE IS REPLACED THE HEA T
SINK (WET CLOTH) MUST BE USED TO PRE­VENT DAMAGE TO THE VA L VE.

1. Assuming the right side and back panelsare
removed, perform the following procedures for
removing the E.P .R. valve.

W ARNING
DISCONNECT THE FREEZER FROM ELECTRICAL SUP­PL Y SOURCE BEFORE SERVICING.

Figure 21. EPR Heat Sink

5. Unsweat the hopper evaporator line and the line
leading to the low side of the main system from
the E.P.R. valve.

6. Remove the E.P .R. valve with the heat sink.

C. E.P.R. Replacement

CAUTION
IF THE E.P.R. VALVE IS REPLACED THE HEAT
SINK (WET CLOTH) MUST BE USED TO PRE­VENT DAMAGE TO THE V AL VE.

1. Position the E.P .R. valve with the heat sink, so
the hopper evaporator outlet line and the line
leading to the low side of the main system
correspond with the proper ports.

2. With an open port braze the lines to the E.P .R.
valve using the appropriate brazing material.

3. Remove the heat sink from the E.P .R. valve.

4. Replace any foam insulation to the surrounding
lines.

5. Purge and evacuate the system.

17