Grindmaster 3511 User Manual

Model 3511 Beverage Freezer Manual

Grindmaster Corporation

4003 Collins Lane

Louisville, KY 40245 USA

[phone] [phone]

FAX [phone]

www.grindmaster.com

0804 Form # WH-305-02

Part # W0600114

© Grindmaster Corporation, 2004
PRINTED IN USA

Table of Contents

Safety Precautions .................................................................................................... 2

Freezer Applications & Specifications ..................................................................... 2 - 3

Installation ................................................................................................................. 4 - 6

Operation and Adjustments ...................................................................................... 6 - 7

Care & Cleaning ........................................................................................................... 8 - 11

Maintenance ................................................................................................................. 11 - 13

Troubleshooting ............................................................................................................ 14

Key Parts Identification ................................................................................................ 15

Assembly Diagrams ......................................................................................................... 16 - 18

Wiring Diagrams ............................................................................................................. 19 - 22

Refrigeration Diagram .................................................................................................... 24

Information contained within this manual is subject to change without notice.

Contact Grindmaster Corporation’s Customer/Technical Service Department at 1-800-695-4500 with any questions or for clarification.

Model 3511 Page 1

OPERATOR’S SAFETY PRECAUTIONS

IMPORTANT: Failure to comply with the following safety precautions may result in severe personal injury or damage

to the machine.

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

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

3. Do not wear loose fitting garments or jewelry which could cause a serious accident.

4. Stay alert at all times during operation.

5. Keep operating area clean.

6. Do not attempt any repairs unless the main power supply to the freezer has been disconnected. Contact
Grindmaster Technical Service for service assistance.

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

8. Do not operate freezer if any excessive noise or vibration occurs. Contact your authorized service agent.

9. 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.

Located on the right, left and rear panels. (part # W0600218)

FREEZER APPLICATION AND SPECIFICATIONS

Model 3511

The freezer consists of a freezing cylinder with a rotating internal auger (dasher) that is belt-driven by an electric
motor. The auger scrapes frozen product off of the inside of the refrigerated cylinder. A torque sensing mechanism
controls compressor operation to maintain desired product consistency. The freezer utilizes an air-cooled refrigera­tion system to freeze the product. A self-closing dispensing valve is attached to the front of the freezing cylinder. The
unit has an adjustable consistency control and an out of product indicator.
When properly operated and cared for, the Model 3511 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 T

ips

The Model 3511 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.

Page 2 Model 3511

Product Tips (cont.)

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 rinsing 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 one-half gallons of frozen product. This
additional volume is the overrun in the product. Crathco offers three 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, a
low overrun carb tube that allows all air trapped in the freezing cylinder to escape and a smoothie/shake carb tube.
This carb tube has an outer sleeve that can be rotated to line up with different hole sizes to provide various levels of
overrun.

Most applications only require the standard carb tube.

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.

Freezer S

pecifications

Model 3511 Page 3

Figure A

Thick product carb tube

(W0471136)

Low overrun

carb tube

(W0472060)

Standard carb tube

(W0471076)

Model 3511

Electrical

220V / 60Hz / 1 Phase
Dedicated 20 Amp circuit

Drive Motor 1/2 hp, Capacitor Start

Compressor 1 hp

Cooling Air-cooled

Actual Weight 175 lbs (79.4 kg)

Mix Hopper Capacity 5 gallons (18.9 liters)

Freezing Cylinder Capacity 1-1/2 gallons (5.7 liters)

Refrigerant See Serial Number Plate

Refrigerant Charge See Serial Number Plate

High Side Approximately 275-350 psi

Low Side 35-40 psi

Page 4 Model 3511

INSTALLATION

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.

Note: 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
and/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
cannot make any claims against the carrier.

Inst

alling Y

our 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 (200 lbs / 90.7 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” Legs)

2. Make sure freezer is to be placed in a location that is within 6’ 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)

NOTE: Failure to allow adequate ventilation will void the warranty and reduce
freezer performance.
NOTE: 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 and supporting all four sides, lift machine up (by the
frame) and place in appropriate area on top of rubber pad.

CAUTION: 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.

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

!

!

Figure B

Figure C

Figure D

Installing Y

our Unit (cont.)

7. Review hopper contents to make sure all parts are available:

8. Fill out Warranty Registration Card with the requested information and mail to Grindmaster Corporation.

9. Replace side panels.

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

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

12. Connect the power cord directly to a properly grounded DEDICATED 220V/60Hz, 15 Amp circuit. Do not use an

extension cord.

Do not alter or deform the plug in any way! Altering or deforming the plug may damage unit and will
void warranty.

13. Remove the drip tray kit from the bubble wrap. 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.

14. Place the key hole slot of the drip tray support bracket (W0471022) on to these screws and tighten the screws.

15. Angle the back of the drip tray surround bracket into the drip tray support bracket (W0471022) and lower bracket

to lock it into place.

16. Place drip tray onto drip tray surround bracket.

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

!

Part # Description

W0600114 Manual
W0600073 Rubber Pad Sheet
W0600121 Merchandiser Installation Sheet
W0600012 MSDS Sanitizer Sheet
W0600159 Warranty Registration Card
W0890218 Drip Tray Kit
W0520094 Hopper Cover
W0480445 Valve Handle
W0631230 Valve Spring

*

Carb Tube

*

Dispense Valve Plunger
W0470076 Lubricant
W0631903 Sanitizer Packets
W0340022 O-rings

* Optional items specified when the unit is ordered.

Model 3511 Page 5

Accessory Installation

The Model 3511 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 (i.e. hazelnut added to cappuccino). See Figure E.

• 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 offers a variety of
drink headers including: frozen beverage, frozen lemonade, cappuccino,
margarita, pina colada, frozen cocktail, frozen daiquiri and smoothie.

OPERATION AND ADJUSTMENTS

How to Operate

1. Sanitize unit following the cleaning instructions starting on page 10.

2. Fill the mix storage hopper following the instructions on page 10. Allow

barrel to fill with product to proper level, then insert carb tube from
parts bag in hole toward rear of hopper. See Figure J.

3. Turn power switch to “ON” position.

4. Allow product to freeze in barrel. Compressor will turn off when product

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 page 7.

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

chart in this manual for regular maintenance schedule.

Mix Low Function

1. 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.
NOTE: Do not run the unit under mix low conditions for long periods of time. This
can affect machine performance or damage componentry.

Page 6 Model 3511

Figure E

Spinner mounting bracket

Spinner

Mounting screws

FILTER

Figure F

Figure G

Electrical box

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

Figure H

Figure I

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)

NOTE: Clockwise is for thicker product consistency and counter clockwise
is 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.

NOTE: 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 should 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.

!

Figure J

Figure K

Adjustment Screw

Increase Thickness

(turn clockwise)

Decrease Thickness

(turn counterclockwise)

Figure L

Model 3511 Page 7

Mix Low Float O-ring

Carburetor

Mix Low Float