Crathco 3312-E Service Manual

Beverage Freezer

Operator Manual

Model 3312

Grindmaster-Cecilware

4003 Collins Lane, Louisville, KY 40245 USA
Phone: [phone] Toll Free: 800.695.4500
Fax: [phone]
Web: gmcw.com Email: [e-mail]

Model 3312

Safety Information .....................................2

Specifications..............................................3

General Information ..................................4

Installation..................................................5

Accessory Installation .................................6

Operation and Adjustments ......................8

Cleaning and Maintenance........................9

Troubleshooting .......................................17

Parts Identification...................................18

Parts Diagram and List .............................19

Wiring Diagram and Parts List.................25

Ladder Diagram........................................28

Spinner Hook-Up ......................................30

Refrigeration Diagram and Parts List......31

Refrigeration Schematic (AC Units).........32

Thank you for purchasing this quality beverage freezer. For your safety and the safety of others, read all
warnings and the operator manual before installing or using the product. Properly instruct all operators.
Keep training records. For future reference, record serial number here:

Table of Contents

©2016 Grindmaster-Cecilware

Printed in USA

0516 Form # WH-313-07

Part # 390-00048

Grindmaster-Cecilware provides the
industry’s BEST warranty. Visit gmcw.com
for warranty terms and conditions.

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Model 3312 Beverage Freezer

Safety Information

Important Safety Information

This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.

WARNING

• Product must be attached to a three wire 120V 20 AMP receptacle (export units - 230V 15 AMP).

• Do not deform plug or cord.

• Follow national and local electrical codes.

• Do not use near combustibles.

• Use only on a circuit load that is properly protected and capable of the rated load.

• Always unplug unit from power supply before servicing or cleaning.

• Note all warning labels on the freezer. If any warning labels are missing or damaged, replace them
immediately.

• Risk of electrical shock. Disconnect power before servicing unit. Do not attempt any repairs unless the
main power supply to the freezer has been disconnected. Contact Grindmaster-Cecilware Technical Service
for service assistance.

FAILURE TO COMPLY RISKS PERSONAL INJURY, SHOCK HAZARD, FIRE, OR DAMAGE TO EQUIPMENT.

CAUTION

• Hazardous moving parts. Do not operate unit with panels removed.

• Do not put objects or fingers in the dispense plunger.

• Read and understand the operating instructions in this manual thoroughly. Only allow properly trained
persons to operate this machine.

• While operating, servicing, or cleaning, do not wear loose fitting garments or jewelry that could get caught
in the machine and cause a serious accident.

• Stay alert at all times during operation.

• Beverage freezers are heavy pieces of equipment. It is recommended that moving or lifting the unit be
done by two people to avoid injury.

NOTICE

• Never connect to an overloaded circuit or to an extension cord, otherwise serious damage to the motor
may result.

• Do not operate freezer if any excessive noise or vibration occurs. Contact Grindmaster-Cecilware Technical
Service for service assistance.

• Be certain machine is installed with adequate space for proper air circulation. (See installation section.)
Failure to provide sufficient ventilation will reduce freezer performance and void equipment warranty.

• Keep operating area clean.

For your safety and the safety of others, read all warnings and the operator manual before installing or using the
product.

DANGER: This term warns the user of imminent hazard that will result in serious injury or death.
WARNING: This term refers to a potential hazard or unsafe practice, which could result in serious injury or

death.

CAUTION: This term refers to a potential hazard or unsafe practice, which could result in minor or moderate

injury.

NOTICE: This term refers to information that needs special attention or must be fully understood.

Model 3312 Beverage Freezer Crathco

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Specifications

Standard 3312 CE 3312

Dimensions 29-3/4”H x 18-1/2”W x 29”D 29-3/4”H x 18-1/2”W x 29”D
(H x W x D) 68 cm x 47 cm x 74 cm 68 cm x 47 cm x 74 cm

(includes header box) (includes header box)
Electrical 115V / 60Hz / 1 PH 220-240V / 50 Hz / 1 PH

Dedicated 20 Amp circuit Dedicated 15 Amp circuit

Circuit NEMA 5-20R Plugless cord (user must attach plug)
Drive Motor (2) 1/4 hp, Capacitor Start (2) 1/4 hp, Capacitor Start
Compressor 3/4 hp 3/4 hp
Cooling Air-cooled Air-cooled
Actual Weight 245 lbs (111 kg) 245 lbs (111 kg)
Mix Hopper Capacity (2) 2.25 gallons (8.5 liters) (2) 2.25 gallons (8.5 liters)
Freezing Cylinder Capacity (2) 1-1/2 gallons (5.7 liters) (2) 1-1/2 gallons (5.7 liters)
Refrigerant See Serial Number Plate See Serial Number Plate
Refrigerant Charge See Serial Number Plate See Serial Number Plate
High Side (operating pressure) Approx. 275-350 psi Approx. 275-350 psi
Low Side 35-40 psi 35-40 psi

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Model 3312 Beverage Freezer

General Information

Freezer Application and Specifications

Model 3312
The freezer consists of two freezing cylinders with

rotating internal augers (dashers) that are belt-driven
by electric motors. The augers scrape frozen product off
of the inside of the refrigerated cylinders. Torque
sensing mechanisms control compressor operation to
maintain desired product consistency. The freezer
utilizes an air-cooled refrigeration system to freeze the
product. Self-closing dispensing valves are attached to
the front of the freezing cylinder. The unit has an
adjustable consistency control and an out of product
indicator for each side.

When properly operated and cared for, the Model 3312
will provide many years of service. Proper care includes
regular cleaning and maintenance. To minimize the
amount of maintenance necessary, follow the operating
procedures outlined in this manual.

Product Tips

The Model 3312 was designed to dispense a wide
variety of frozen beverages including frozen fruit juice,
frozen lemonade, slush, and frozen cocktails. These
products can be served in consistencies ranging from
thin to fairly thick.

Two types of dispensing valve plungers and product
consistency springs are available depending on the
thickness of the product being served. These parts are
interchangeable depending upon your needs. One
plunger, part W0480438 has one horizontal outlet slot
and is used to serve thin to medium products such as
frozen lemonade and slush. The other plunger, part

W0480451 has two horizontal outlet slots and is used

to serve thicker product such as neutral base frozen
cocktails. A red spring, part W0631239, is used on the
drive motor to adjust product consistency to serve thin
to medium products. The yellow spring, part W0631238,
is used for thicker product. The spring is located next to
the drive motor behind the right hand side panel.

Over an extended period of time, some products, such
as frozen cocktails that contain alcohol, have a
tendency to separate, or stratify. Separation of product

on the mix storage hopper can result in frozen product
quality inconsistency. Simply keeping the product, in the
mix storage hopper, stirred on a regular basis will
eliminate this problem.

Some cappuccino or latté mixes contain dairy products
which can spoil if not refrigerated. If the freezer is to
be turned off at night, these products must be removed
from the freezer.

Contact your local health department regarding its
regulations for proper mix handling and storage.

Carburetor Assembly

Your new freezer uses a metering device, known as a
carburetor, to feed the proper ratio of mix and air into
the freezing cylinder (and to prevent frozen product
from running out of the freezing cylinder).

The carburetor, or carb tube, is a tube with a hole, or
series of holes, bored through the side. It is located in
the hopper and fits in the hole that leads to the
freezing cylinder. Air flows into the freezing cylinder
through the top of the tube and mix flows in through
a smaller hole in the side of the carb tube. The size of
the mix inlet hole can be balanced with the viscosity
(thickness) of the liquid mix and product draw rate, in
such a way that the proper amount of mix is fed into
the freezer cylinder to blend with air at just the right
ratio. Mix viscosity varies by mix type, mix temperature,
and mix age. Different serving rates also demand
different feed rates. For many products, the proper mix
to air ratio is generally accepted to be two parts mix to
one part air. This proportion yields a finished product
that is both tasty and profitable. At this ratio, one
gallon of liquid mix will yield a volume of one and one­half gallons of frozen product. This additional volume
is the overrun in the product. Crathco offers two
versions of carb tubes (see Figure A). Depending on the
product being served and overrun requirements there
is a standard tube for most slush or cocktail products
and a low overrun carb tube that allows all air trapped
in the freezing cylinder to escape. Most applications
only require the standard carb tube.

Standard
carb tube

(W0471076)

Low overrun
carb tube

(W0472060)

Figure A

1

2

1

2

2

Model 3312 Beverage Freezer Crathco

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General Information (continued)

Mix Considerations - General

Freezing characteristics are affected by the amount of
sweeteners and solids in the mix. The amount of
sweeteners and solids is called BRIX. BRIX can be
measured with an instrument called a refractometer. A
BRIX reading of between 11 and 14 will provide
optimum freezer operation. Mixes with this BRIX level
will freeze down to a smooth, uniform consistency.
Mixes with too high a BRIX level will take longer to
freeze down and will yield a soft, wet frozen product.
Mixes with too low a BRIX level will have larger ice
crystals and will have a tendency to dispense slowly.
Alcohol content also affects product freezing
characteristics. High alcohol content may prevent the
freezer from serving product at proper thickness.

Note: Always take BRIX measurement using mix that
has been thoroughly blended, before it is frozen.
Always allow frozen mix to thaw thoroughly before
taking a reading.

For maximum output capacity, always pre-chill mix
before adding it to the freezer. Pre-chilled mix gives the
freezer a head start on the freezing process and will
speed both initial freeze down and recovery time. It is
normal for output capacity to decrease when warm mix
is added, or when the freezer is operated in a warm
area.

Shipment Transit

1. The freezer has been operated and tested
at the factory. Upon arrival the complete
freezer must be thoroughly checked for any
damage which may have occurred in transit.

NOTICE: A Tip (N) Tell warning device is placed on

each shipping carton at the
factory. If the indicator is red, the
carton has been tipped in transit.
(See Figure B.)

2. 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 or
shortages are found later, advise the carrier
within 10 days and request inspection. The
customer must place any claim for damage
and/or shortage with the carrier.
Grindmaster-Cecilware cannot make any
claims against the carrier.

Installing Your Unit

1. Place the self-sealing rubber pad (shipped
with the freezer) on a level counter that is
stable and strong enough to safely support
the freezer’s weight (245 lbs. / 111 kg), or if
equipped with legs instead of pad, install
legs by screwing them into the four leg
holes on the bottom of the unit. (Leg Kit
Part # W0890220 (4) 4” (10 cm) Legs)

2. Make sure freezer is to be placed in a
location that is within 6’ (1.8m) of a
properly grounded circuit and allows
adequate space at each side and above for
proper air circulation.

Air Cooled Units Only: Minimum
clearance is 6” (15 cm) on both sides and 0”
at back and open above the freezer. (See
Figure C.)

NOTICE: Failure to allow adequate ventilation will

void the warranty and reduce freezer performance.

NOTICE: Locating the unit in high ambient

temperatures (over 100°F / 37.8°C) will significantly
reduce the performance of your machine.

3. Remove the side panels. Supporting all four
sides, lift machine up (by the frame), and
place in appropriate area on top of rubber
pad.

NOTICE: If equipped with spinner, do not lift unit up

by spinner shaft. It will cause serious damage to spinner.

CAUTION: Beverage freezers are heavy pieces of

equipment. It is recommended that moving or lifting
the unit be done by two people to avoid injury.

Installation

Figure B

Figure C

0” CLEARANCE
AT REAR OF
MACHINE

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Model 3312 Beverage Freezer

Installation (continued)

Installing Your Unit (continued)

4. The side panels should still be removed. Cut
the cable tie used to secure motor during
shipment. Make sure motor rocks freely. See
Figure D.

5. 220V/50Hz Units: These units come with a
plugless cord that requires the appropriate
plug configuration be connected. This must
be determined by the power outlets at the
specified location. See wiring diagram at
back of manual for assistance. It is
recommended that a service technician
performs this operation.

6. Review contents from hopper to make sure
all parts are present:

* Optional items specified when the unit is ordered.

7. Fill out Warranty Registration Card with the
requested information and mail to
Grindmaster-Cecilware.

8. Replace side panels.

9. Assemble the dispense valve following the
instructions on page 12. The valve plunger,
spring, and retaining pin come in the small
parts bag.

10. Be sure ON-OFF-CLEAN switch (toggle
switch located underneath the electrical
box) is in the “OFF” position.

11. Connect the power cord directly to a
properly grounded DEDICATED 120V/60Hz,
20 Amp circuit or 220-240V/ 50Hz, 15 Amp
circuit for CE models. Do not use an
extension cord.

WARNING Do not alter or deform the plug in any

way! Altering or deforming the plug may cause
electrical shock, damage unit, and will cause serious

personal injury.

12. Remove the drip tray kit from the plastic
bag. Separate the parts and remove the
protective coating. The drip tray is mounted
on two screws that are located on the lower
front of the freezer cabinet.

13. Place the key hole slot of the drip tray
support bracket onto the screws located on
the lower front of the freezer cabinet and
tighten these screws.

14. Place drip tray onto drip tray surround
bracket.

15. Place the louvered drip tray insert into drip
tray.

The Model 3312 has several optional accessories that
can be added to the unit in the field to meet your
application’s needs. These accessories come with
installation instructions.

• Spinner - Spinners are typically used in
applications that add flavoring to a frozen neutral
base product after it is dispensed.

Allows operator to serve a wider variety of frozen
drinks from one machine (e.g. hazelnut added to
cappuccino). See Figure E.

Figure D

Part # Description

390-00048 Manual
W0600013 Rubber Pad Sheet

W0600121 Merchandiser Installation Sheet

W0600012 MSDS Sanitizer Sheet

W0600159 Warranty Registration Card
W0890182 Drip Tray Kit
W0520093 Hopper Cover
W0480445 Valve Handle (2)
W0631230 Valve Spring (2)

*

Carb Tube (2)

*

Dispense Valve Plunger (2)

W0470076 Lubricant
W0631903 Sanitizer Packets

W0600058 Laminated Cleaning Instructions

W0600327 Seal Installation Instructions

Accessory Installation

Spinner mounting bracket

Spinner

Mounting screws

Electrical box

Figure E

REMOVE CABLE TIE

• Concealed Air Filter - Prevents dust from clogging
the condenser.

Ideal for applications near beaches. Helps maintain
maximum air flow and optimum freezer
performance. See Figure F.

NSF approved. Part # W0890200 stainless steel;

W0890208 black.

• Exposed Air Filter - Similar to concealed air filter.
Not NSF approved. Part # W0890206. See Figure G.

• Valve Lock Security Bracket - Part # W0471135.
Ideal for self-service locations to prevent
unauthorized use. Lock must be purchased
separately. See Figure H.

• Remote Fill Control - Automatically refill the mix
storage hopper. Provide additional labor savings by
pre-mixing product automatically and monitoring
system to maintain the mix hopper level.

• Private Label Header - A private label or different
drink header can be installed by removing two screws
from the electrical box cover. Place the header
(transparency) between the clear and opaque plates
(plastic lens). Put these in place under the lip of the
machine top. Slip the electrical box cover back on to
the machine and reinsert the screws. (See Figure I.)
Grindmaster-Cecilware offers a variety of drink
headers including: frozen beverage, frozen
lemonade, cappuccino, margarita, piña colada,
frozen cocktail, frozen daiquiri, and smoothie.

Model 3312 Beverage Freezer Crathco

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Accessory Installation (continued)

FILTER

SLIDE THE FILTER IN BEHIND
THE FILTER PANEL, & IN FRONT
OF THE EXISTING SIDE PANEL.
TO CHANGE, REMOVE, CLEAN
AND/OR REPLACE.

Figure F

Figure G

Figure H

Figure I

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Model 3312 Beverage Freezer

Operation and Adjustments

How to Operate

1. Sanitize unit following the cleaning
instructions starting on page 9.

2. Fill the mix storage hopper following the
instructions on page 13. Allow barrels to fill
with product to proper level, and then
insert carb tube from parts bag in hole
toward rear of hopper. See Figure J.

3. Turn power switch to “ON” position for
each barrel.

4. Allow product to freeze in barrel.
Compressor will turn off when product in
both barrels reaches pre-set consistency.

5. To dispense product, pull down valve
handle and release when done.

6. If product consistency is not as desired,
adjust per the instructions on this page.

7. Refill mix storage hopper when “mix out”
light is on.

8. Clean the unit regularly following local
health codes.

9. Perform maintenance when necessary to
increase the life of the unit. See the chart in
this manual for regular maintenance
schedule (page 14).

Mix Low Function

This model utilizes a simple float mechanism to sense
when mix is low in hopper. (See Figure J.) When the mix
level in the hopper is low, the mix low light located in
the front of the machine next to the valve block will
illuminate. (The left-most light corresponds to the left
barrel.)

NOTICE: Do not run the unit under mix low

conditions for long periods of time. This can affect
machine performance or damage componentry.

Consistency Adjustment

From time to time, it may become necessary to readjust
the consistency setting (thickness) to compensate for
variation between different mixes or to switch from one
type of product to another. This adjustment is made as
follows:

1. Disconnect electrical power.

WARNING: Do not attempt to readjust the

freezer until electrical power has been disconnected.

2. Remove right side panel (facing the freezer).

3. Use the adjustment screw, situated on the front
of the drive motor mounting bracket to change
product thickness. Turn the thumbscrew (3 full
turns for red spring, 1 turn for yellow spring) to
make a noticeable change in consistency. (See
Figure K.)

NOTICE: Turn screw clockwise for thicker product

consistency and counter clockwise for thinner product
consistency. (See Figure L.)

4. Reinstall the side panel, reconnect power.

5. Turn freezer to “ON” and allow it to freeze to
desired consistency.

6. Check product. Repeat process until desired
consistency is achieved.

NOTICE: When making changes to a colder (thicker)

setting, recheck consistency again after the compressor
has cycled off. When adjusting (counter-clockwise) to a
thinner consistency, a large portion of product must be
drawn from the dispense valve to reduce the product
thickness below the new set point (adjustment). Then
allow the freezer to refreeze product to the new
setting.

Mix Low Float O-ring

Carburetor

Mix Low Float

Figure J

Increase Thickness

(turn clockwise)

Decrease Thickness

(turn counterclockwise)

Figure L

Figure K

Model 3312 Beverage Freezer Crathco

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Cleaning and Maintenance

Cleaning and sanitizing frequency must be followed in
accordance with state and local health department
regulations.

NOTICE: Each time the freezer is fully disassembled,

all food zone freezer components must be thoroughly
washed and sanitized using procedures recommended
by the local health department. In lieu of local health
department recommendations, use a three
compartment sink; one compartment to wash parts in
detergent, one compartment to rinse, and one to
sanitize.

Drain and Rinse

1. If the freezer is empty, proceed to Disassembly
and Cleaning. If there is product in the freezer,
turn the front panel switch to “CLEAN”. It is
recommended to schedule cleaning when
product in the hopper is low to minimize
product loss.

2. On freezers using the optional Remote Fill
Control and Proportioning Pump, turn “OFF”
the water valve on the Proportioning Pump,
using the valve next to the inlet pressure
regulator and turn the switch on the Remote Fill
Control to “OFF”.

3. Open the front dispensing valve and drain all
product from the freezer. Close the dispensing
valve and turn freezer to “OFF”.

NOTICE: Use approximately 2½ gallons (10 liters)

of cool water to rinse product out of freezer.

4. Remove the carburetor tube and pour water
into the storage hopper. Allow the water to fill
the freezing cylinder.

5. Turn the panel switch to “CLEAN” for 5 minutes.

6. Open the dispensing valve and drain the water
from the freezer.

7. Turn the freezer “OFF”.

Disassembly and Cleaning

NOTICE: For cleaning and sanitizing before initial

start-up remove carb tube, dispense plunger, handle,
and spring from parts bag first.

1. Disassemble the dispensing valve assembly (see
Figure M). Pull out valve handle retaining pin
while supporting the valve plunger from the
bottom (see Figure N). Push up on the valve
plunger and remove the stainless handle (see
Figure O). Slide the valve plunger and spring
downward to remove (see Figure P).

2. Remove knobs and carefully remove the front
dispensing valve assembly, leaving the dasher
assembly in the cylinder. Remove the O-rings
from the plunger assembly and back of the
dispensing valve body. (See Figure Q, page 10.)

Figure M Disassemble Dispensing Valve

Figure N Remove Pin

Figure O Remove Handle

Figure P Remove Plunger and Spring

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Model 3312 Beverage Freezer

Cleaning and Maintenance (continued)

Disassembly and Cleaning

NOTICE: The best way to remove an O-ring is to first

wipe off all of the lubricant using a clean paper towel.
Pinch the O-ring upward with a dry paper towel
between your index finger and thumb. When a loop is
formed in the O-ring, roll it out of the groove with your
other thumb. Always remove the O-ring farthest from
the end of the plunger first. Carefully inspect the O­rings and replace if necessary. Be careful not to pull or
tug excessively on O-rings. O-rings can be distorted,
which will deteriorate sealing performance. (See Figure
Q.)

3. Remove the dasher assembly from inside the
freezing cylinder taking care to avoid damaging
the rear seal assembly at the back of the
freezing cylinder. Disassemble the dasher
assembly by removing the stator rod and front
and rear stator rod bearings.

4. Remove stationary half of the shaft seal
assembly from the back end of the freezer
cylinder. This is accomplished by reaching into
the cylinder and pulling seal out with your
index finger. (See Figure R.)

5. Slide the rotary half of the seal off the dasher
shaft. Inspect both seal components carefully
for nicks or cracks. Replace seal if defective.

NOTICE: To prevent leakage the surfaces of the rotary

seal and the stationary seal must be smooth with no
chips or cracks.

NOTICE: All units are shipped with a standard ceramic

seal (Part # W0340201) unless otherwise specified.
Certain products contain coconut oil which requires a
different sealing material. For these products use the
coconut oil seal (Part # W0340210). The stationary half
of the standard seal has a white polished surface. The
stationary half of the coconut oil seal has a glossy black
surface.

6. Remove carb tube from bottom of hopper and
remove O-rings. (See Figure S.)

7. Repeat disassembly procedures on other side.

8. Remove drip tray and empty contents.

9. Take all components to the cleaning area.

10. Prepare 1 gallon (3.8 liters) solution of hot tap
water and common dishwashing detergent.

11. Using a warm, mild detergent solution,
thoroughly wash all components, including the
inside of the freezing cylinder and the mix
storage hopper. DO NOT WASH COMPONENTS
IN A DISHWASHER.

12. Use a medium sized brush to clean the bottom
of the valve body and the inside of the plunger
bore with detergent solution, taking care to
remove only remaining lubricant. (See Figure T.)

13. The exterior of the freezer should be cleaned as
needed with a cloth towel.

NOTICE: Coarse rags, abrasive cleaners, and

excessive force can damage and/or scratch the
surfaces of the freezer.

Figure Q Ring Removal

Figure R Removal of stationary half of seal

Figure S Carb Tube

Figure T Clean Valve Body