Grindmaster MG236-2B, MG235-2B, G236-2B, G23-2B User Manual

Grindmaster Corporation
4003 Collins Lane
Louisville, KY 40245 USA
Phone: (502) 425-4776
(800) 695-4500 (USA & Canada only)
Fax: (502) 425-4664
www.grindmaster.com • info@grindmaster.com
0608 Form# CC-399-05
© Grindmaster Corporation, 2000 PRINTED IN THE USA
Crathco® Visual Granita Machine
Operation and Instruction Manual
for
G & MG Series Models
Prior authorization must be obtained from Grindmaster Corporation for all warranty claims.
Models G23-2B, G235-2B, G236-2B,
MG23-2B, MG235-2B & MG236-2B
TABLE OF CONTENTS
Introduction and Warnings......................................2
Installation............................................................2-3
Connection To Power Supply..................................3
Preparing Product ..................................................4
Operating Panel......................................................4
Programming - G Series Electronic
Touchpad Model ..................................................4-6
Errors - G Series Electronic Touchpad Model ....6-7
Operating Panel Description-MG Series Traditional
Rocker Switch Model ..............................................7
Dispensing Product ................................................8
Adjustments ............................................................8
Cleaning & Sanitizing ........................................9-11
Maintenance ....................................................11-13
Crathco Granita Preventive
Maintenance Checklist ......................................14-15
Accessories ..........................................................16
Troubleshooting ..............................................17-18
Exploded View ................................................19-26
Crathco Granita G&MG Series Parts List ............27
Gear Motor Exploded View ..................................28
Refrigeration Diagrams....................................29-30
Electrical Diagrams..........................................31-33
Page 2 G & MG Series Granita Machine
Introduction and Warnings
This instruction manual is an important part of this Granita machine and must be kept for future reference.
Carefully read the warnings contained in this instruction manual before installing and operating this Granita machine.
Instructions For Machine Transport
NOTE: Refrigeration equipment must remain upright to avoid damage to the compressor
In order to prevent the oil contained in the compressor from flowing into the cooling circuit, it is necessary to always ship, carry, store and handle this Granita machine in an upright position, following the instructions located on the packaging. Never ship,
carry, store or handle unit on its side.
Installation
1.) Cut banding straps from box and lift the box off the machine (see fig. A).
2.) Positioning the machine
• The machine must be well ventilated. Leave an 8” (20 cm) clearance on the sides and back of the machine to allow proper ventilation. Installation of the machine near a heat source should be avoided. Some heat sources you should avoid locating this unit too close to are ovens, coffee machines, cold or frozen beverage dispensers or ice machines (equipment with compressors that expel hot air through its vents). Machines should also not be positioned near dust pro­ducing units such as a Powdered Cappuccino or Cocoa dispenser. A room tem­perature between 59°F (15°C) and 77°F (25°C) is recommended (see fig. B).
• The lit merchandising covers are reversible (front to back) depending upon the needs of the operator (see fig. B).
3.) Remove Shipping Pin
• Lift up and remove rear back-lit merchandiser panel (see fig. C). NOTE: Some units may have dual rear back-lit merchandiser panels, these function in the same manner as the single panel rear merchandisers.
• Pull out each pin attached to each tag (see fig. D)
• Replace rear back-lit merchandiser panel (see fig. E).
(Figure A)
(Figure B)
(Figure C)
(Figure D)
(Figure E)
Attention: Shipping pin attached to tag located behind
each bowl must be removed before starting machines.
!
8" (20 cm)
G & MG Series Granita Machine Page 3
Installation (cont.)
4.) Installing the Top Lid Merchandiser (requires Phillips head screwdriver)
• Unplug the cord to the lid and remove the lid from the machine.
• On top of the cover, remove the 4 hole plugs over the front (2) screws, middle (near rocker switch) and back screws then remove these 4 screws with a Phillips head screwdriver. Remove the black top part of the cover from the clear plastic base. (see fig. E)
• Slide the merchandiser header around the outside edge of the lid’s clear plastic base. Position bottom edge of header in grooved area. (see fig. F)
• Reassemble the black top cover onto the clear plastic base. The top edge of header should slide into black top cover grooved area. (see fig. F) Replace screws. Replace hole plugs (the angled plugs goes in the rear hole, and the two large plugs go in the two front holes and the small plug goes in the center hole by the rocker switches).
• Replace assembled lid on machine and reattach cord.
5. Installing the Rear Back-lit Merchandiser
• To remove any existing artwork, bend or pinch the middle of the back-lit merchandiser and pull it from the rear merchandising display casing. (see fig. G)
• To insert new art, slide the left corner edges into the left top and bottom casing edges. (see fig. H)
• Slightly bend art and insert the right side of art into the right top and bottom casing edges. (see fig. H)
• Smooth out art until all edges are properly inserted into the casing.
Connection To Main Power Supply
• The electrical safety of this Granita machine can only be achieved if the machine is properly connected to an appropriate grounded, electrical receptacle that is in compliance with current national safety stan­dards. Therefore, the manufacturer cannot be held responsible for damage and/or injury caused by fail­ure to connect the unit to an appropriate source of power.
• For a safe and correct installation, connect the unit to a dedicated outlet.
• Do not alter the cord or plug in any way.
• The entire length of the power supply cord must not, in any way, be compressed (bent or bunched together) nor may extension cords be used.
• Do not obstruct the ventilation and heat dispersion grill vents on the side and rear panels of the unit. An insufficient ventilation process may reduce the efficiency of the machine, causing it to function inade­quately, and cause serious damage to the machine. A minimum of eight inches (20cm) clearance is necessary on each side and behind the unit.
Attention: Altering the cord or plug will void the warranty.
!
Attention: Before inserting the plug into the electrical
outlet, carefully read the following precautions.
!
(Figure E)
(Figure F)
(Figure G)
(Figure H)
Operating Panel -Electronic Touchpad
Programming G Series Electronic Touchpad Models
Models G23-2B, G235-2B & G236-2B Electronic Touchpad:
Main Power Switch:
1.) Turns unit ON.
2.) Selects 12/24 time or FÞ/CÞ temperature display when turned ON while simultaneously depressing the auger button.
3.) Sets current time when turned ON while simultaneously depressing the “Mode/Press To Select Function” button.
Page 4 G & MG Series Granita Machine
(Figure L)
Auger ON/OFF
COLD
FROZEN
OFF
COLD
AUGER ON/OFF
PRESS TO SELECT
FUNCTION
FROZEN
OFF
Press To Select Function
ON
AUTO TIMER
OFF
AUTO TIMER
Preparing Product
1.) If using product concentrate (instead of ready-to-use product), dilute and mix the prod­uct with water, according to the directions given by the manufacturer, in a separate container (see fig. I). Never pour dry powder, crystals, or concentrate into a dry bowl.
2.) Slide the merchandising lid either forward or toward the back of the bowl until the “stops” reach the edge of the bowl. (It is not necessary to remove the merchandis­ing cover.) When sliding lid back make sure that no droplets of water come off lid. Pour the prepared product into the bowl (see fig. J). Do not spill any material on lid or on bowl. There is a minimum and maximum fill line on the bowl. Do not overfill or run the unit without enough product. Running unit with product below the minimum full line may cause damage to the unit.
3.) Insert the plug into a dedicated electrical outlet.
Operating Panel
In order to access the operating panel, lower the cover (A) as shown in figure K. To lower the cover use a coin or other object to turn the keyless lock to the horizontal position.
(Figure J)
(Figure I)
(Figure K)
Attention: Make sure that the mixture has a 13% minimum
Brix (sugar content). A lower concentrate could seriously damage the mixing parts, as well as the gear motors. NEVER USE ONLY WATER.
!
LED
G & MG Series Granita Machine Page 5
Model G23-2B Electronic Touchpad (cont.):
Auger ON/OFF Button:
1.) Turns auger ON and OFF when main power switch is ON.
2.) Must be ON to permit defrost time to be reset.
3.) Must be ON to activate the “Mode/Press To Select Function” button to select manual “OFF”, “FREEZE” or “COOLING” functions.
Mode/Press To Select Function Button:
1.) Used to manually select “OFF”, FREEZE” or “COOLING” functions when auger is turned ON.
2.) Accesses defrost timer reset mode when depressed for an extended period when auger is turned ON.
3.) Locks in hours, minutes and final time settings after they are reset using the “Auto Timer” button.
4.) Does not function when light on “Auto Timer” button is illuminated.
“Auto Timer” button
1.) Turns auto defrost mode ON or OFF (light on switch indicates when auto defrost mode is activated).
2.) Used to adjust the hours and minutes settings when readjusting current time or auto defrost timer.
Enter Time Programming on Initial Installation or in the Event of a Time Change:
1.) Turn OFF power switch.
2.) While pressing left “Press To Select Function” button, turn ON power switch while continuing to hold the “Press To Select Function” button until the display illuminates (hour digits will start to blink).
3.) First set hour by pressing the “Auto Timer” clock button until the appropriate hour is shown (note: when using a 12 hour clock the time is P.M. when the dot at the bottom right corner of the LED is lit; when dot is not lit it is
A.M.)
4.) To set the minutes press the left “Press To Select Function” button, then press the “Auto Timer” clock button until the appropriate minutes are set.
5.) To save your settings press the “Press To Select Function” button one more time.
Setting Defrost Timer (Night Setting):
1.) Turn power switch ON.
2.) Then press “Auger ON/OFF” button on for the side you are setting.
3.) Then press and hold the “Press To Select Function” button until you hear a long beep and the LED, “cold” and the “Auto Timer” clock light begins to blink.
4.) Press the “Auto Timer” clock button to set the hour you want it to turn to refrigeration mode and then press the “Press To Select Function” button to save the setting.
Page 6 G & MG Series Granita Machine
Setting Defrost Timer (Night Setting) (cont.):
5.) Then press the “Auto Timer” clock button to set the minutes to complete time setting that you want it to turn to refrigeration mode, (defrost mode). Then press the “Press To Select Function” button to save the setting.
6.) Proceed to setting the time you want the machine to turn to freezing mode by following steps 4 and above. Then press the “Press To Select Function” button to save the time settings for freeze mode. Freeze light should be blinking.
Note: Once the settings have been saved, the unit will save the settings, even when the power switch is turned OFF.
When the light on the “Auto Timer” clock button is “on”, the defrost timer is activated. To turn OFF the defrost timer, press the “Auto Timer” clock button(s) until the light(s) on the clock button(s) turns off.
Operate in Automatic Mode (with Defrost Timer Activated):
1.) Turn power switch ON and wait for LED to light up.
2.) Press auger button “ON” for the side you are setting.
3.) To operate in defrost mode press the “Auto Timer” button until it is illuminated.
4.) When setting automatic times, please keep in mind it will take time for the frozen product to become liquid or vice versa.
Operate in Manual Mode (without Defrost Timer Activated):
1.) Turn power switch ON and wait for LED to light up.
2.) Make sure clock button is OFF (LED light on clock button should not be lit up).
3.) First turn auger on by pressing “Auger ON/OFF” button until it beeps. (Note: The auger must be on before unit will allow the cooling or freezing mode to activate)
4.) Then select refrigeration or freezing mode by pressing the “Press To Select Function” button until the light under the selection you desire is lit up. (Note: In the cooling mode, the LED will read the actual temperature of the product {The temperature setting is preset to NSF standards and is not adjustable.}) In the freezing mode the LED will read the current time.
G SERIES MODELS - ERROR MESSAGES
1.) “FILTER CLEANING” ALARM
A filter cleaning alarm will activate when the unit is running hot due to insufficient internal air circulation. When this occurs a “Filtr” message will appear on the touchpad LED readout and an intermittent audible tone will also sound to alert the operator of this condition.
The “Filtr” message will appear when the alarm activates (a beeping sound every 4-5 seconds). To determine the condition that caused the alarm and correct problem, see list of conditions below:
• Condition: The filter is dirty and needs to be cleaned. - Corrective Action: Clean and replace filter following instructions on page 11 (Removing and Cleaning Filter).
• Condition: The unit is positioned too close to a wall or other object restricting air flow and causing the machine to run at a higher temperature. - Corrective Action: Reposition unit to maximize ventilation space (see page 2 - installation figures).
• Condition: The filter is not properly installed. - Corrective Action: Properly install filter see “Removing and cleaning filter” page 11.
• Condition: The unit has been installed near a heat source, such as a coffee machine, ice maker or cold beverage machine which expels hot air from its vents, causing the machine to run at a high temperature. (Installation near a heat source should be avoided) - Corrective Action: Reposition unit to maximize ventila­tion space (see page 2 - installation figures).
G & MG Series Granita Machine Page 7
G SERIES MODELS - ERROR MESSAGES (CONT.)
2.) “SYSTEM OVER TEMPERATURE” ALARM
• A system over temperature alarm will activate as a safety when the unit has overheated to protect the compressor.
• The system automatically goes to “OFF” status where the compressor’s operations is stopped, while augers will keep working to avoid forming ice blocks.
• When this occurs an “Err” message will appear on the touch pad LED readout accompanied by a continu­ous buzzer sound to alert the operator of this condition.
• When this alarm activates, turn off all switches. Then determine the condition. (See “Filter Cleaning” Alarm Section for Conditions and Corrective Actions)
Operating Panel Description-MG Series Traditional Rocker Switch Model
1.) Turn ON the main power switch (D) (see figure M)
2.) Description of the buttons (see figure cc): Each bowl is controlled by three switches which have the following functions:
(E) activates the mixing parts/spiral auger (F) activates the freezing of the product (G) activates the refrigeration of the product (night/defrost setting)
To obtain a slush:
Select the (E) switch to activate the mixing parts/spiral auger and select the (F) switch to activate the freeze mode. Note: There is a 4 minute delay before the compressor will start.
To obtain cold (night/defrost) drinks:
Select the (E) switch to activate the mixing parts/spiral auger and select the (G) switch to activate the refrigeration mode.
Stand-by mode setting:
Select the (E) switch to activate the mixing parts/spiral auger and the (G) switch to activate refrigeration mode to keep the product(s) in bowl(s) overnight.
Defrost Timer Operating Instructions
1.) SETTING CURRENT TIME - Rotate the program disc, in the direction of
the arrows, to align the correct time of day with the time of day mark. Figure H shows the timesetting of 7:00.
2.) SETTING DEFROST MODE - Set the defrost period by pushing the switch
actuator toward the outer edge of the program disc. Freeze time is set by pushing the switch actuators toward the center of the time switch. Figure N shows a defrost time from 11:00 to 6:15. The light and dark shaded areas of the program disc indicate day and night respectively. Each actuator is equivalent to 15 minutes.
3) All switches (power, auger, refrigeration and freeze) must be “on” for defrost timer to properly function.
NOTE: The timer is battery backed. Do not remove power from the unit for greater than 2 weeks as doing so will result in failure of the battery back-up feature. The battery is nickel cadmium and will last from 6 to 8 years if properly charged. The battery is not replaceable upon failure.
(Figure N)
(Figure M)
Dispensing Product
To dispense the product, position the cup under the dispensing valve (C) and lower the dispensing lever (B) (see fig. O).
Adjustments
Consistency Adjustment
1.) Unplug the machine.
2.) Be sure that product in bowl is within proper fill range.(Above the minimum fill line)
3.) Remove merchandiser.
4.) Change the thickness of the product by turning the screw (D) on the back of the bowl, as shown on fig. P. Turn the screw clockwise for thinner product or counterclockwise for thicker product. The indicator gauge (D1), located on the back of the bowl, shows the degree of adjustment (+/-). (+) = thicker, (-) = thinner Note: This (D1) is an indicator gauge only. To adjust consistency, turn screw
on top (D).
Page 8 G & MG Series Granita Machine
(Figure Q)
(Figure P)
Attention: To prevent the product from becoming too thick,
it is necessary to push left “Press To Select Function” and right “Press To Select Function” keys to cold drink position or to refill the bowl when the level of the granita inside the bowl is below the minimum fill line.
!
!
Attention: If the machine is turned off at night, with the bowls filled,
or just partially filled, a layer of solid ice may form on the surface due to the natural separation of the unmixed (non-moving) product. In this case, before turning the machine back on, remove the layer of superficial ice to prevent damage to the mixing auger.
(Figure O)
G & MG Series Granita Machine Page 9
Cleaning and Sanitizing Procedures
Daily Cleaning
For the machine to function properly, it is important that the cleaning procedures be carried out daily, according to the following instructions:
1.) Turn off the / (G, fig. M) refrigeration and / (F, fig. M) freezing switches and empty the bowl of its remaining product; after draining the prod­uct from the unit, you can fill the bowl with hot water (not boiling) to help melt off any sugar deposits. Then drain the water prior to proceeding to step (2).
2.) Unplug the unit.
3) Pull out the mixing rod (E) by pushing it slightly backwards to remove it from its position (see fig. Q on pg.8).
4.) Unscrew and remove the two knobs (F) then lower the bowl to drain out any remaining product through the dispensing valve (see fig. R).
5.) Remove and disassemble the dispensing valve:
• Remove the pin (G) as shown (see fig. S).
Then, remove the handle (B) sliding it from its seat.
• Simultaneously apply pressure to the two securing tabs (H) and
lift the dispensing valve (C) to pull it out of its position (see fig. T).
6.) Remove the bowl (L) by unscrewing the two knobs (F) and
pulling it downwards as shown in fig. U.
7.) Unscrew the securing bolt (M) clockwise. Pull off the auger (N)
and remove the shaft seal (O) and the bowl seal (P) (see fig. V).
8.) Remove the drain tray by lifting up on the front edge, while lowering the
rear edge, and then lift it off the unit (see fig. W).
9.) Thoroughly wash each part that has been removed in steps 1-8 and the base
(Q), as well as the freezing cylinder (R) with warm water and mild dish­washing detergent. Rinse well with clear water and allow to air dry (see fig. X). Avoid the use of abrasive cleaners which can damage the finish. Do not put in dishwasher. Dishwasher may damage some parts such as the clear plastic auger gears and top mixing bar. Reassemble with clean hands.
(Figure V)
(Figure W)
(Figure X)
(Figure U)
!
Warning Disconnect the unit from its power supply
prior to cleaning or sanitizing the unit. Failure to do so may result in electric shock.
(Figure R)
(Figure S)
(Figure T)
Page 10 G & MG Series Granita Machine
Cleaning and Sanitizing Procedures (con’t)
10.) Reassemble the mixing unit back together, according to the following procedures (see fig. Y):
Moisten the bowl seal (P) with water and slip it into place at the back of cylin-
der with ribs angled toward back of freezer.
Apply food grade lubricant to the inside of the shaft seal (O) and put the shaft
seal (O) back on with the flared end of seal toward back of freezer.
Put the auger assembly (N) back on the evaporator.
Secure all the parts in place by screwing on the bolt (M) counterclockwise.
11.) Reassemble the bowl (L), positioning it into place. Make sure that the bowl fits tightly to the bowl seal (see fig. Z). We also suggest that the rear part of the bowl be moistened with water or lightly lubricated at the point where it fits together with the seal to make it easier to install bowl.
11a.) The lower right and left bowl flanges should fit on the outside of each black tri-
angle edge (see fig. AA). The lid cover will not fit properly if this is not cor-
rectly positioned.
12.) Secure the bowl (L) by keeping it lifted until the bolt (M) is aligned with its hole (S), then tightly screw on the knobs (F) without exerting excessive pressure to avoid cracking the bowl (see fig. BB).
13.) Reassemble the mixing rod (O) so that its gears are aligned with the lower gear ring. This will allow the front pin to fit perfectly in its position on the bowl (see fig. CC).
14.) Reassemble in sequence the parts of the dispensing valve as follows (see fig. DD).
• Make sure that the dispensing valve seat is properly
lubricated with food-grade lubricant (such as Haynes Lubrifilm).
• Put the dispensing valve body (T) in its seat.
• Insert the spring (U).
• Put the dispensing valve upper body (V) into its position
until it completely snaps into place.
• Reassemble the handle (B) and insert retaining pin (G)
following the same procedures in #5, fig. S.
15.) Reinstall the drain tray (fig. T). Make sure that the condensation drainage tube (J) is reinserted into its correct fixed position, allowing it to drain into the tray.
(Figure BB)
(Figure CC)
(Figure AA)
(Figure DD)
(Figure Z)
Bowl outside corner must be over the white plastic edge.
(Figure Y)
G & MG Series Granita Machine Page 11
Cleaning and Sanitizing Procedures (con’t)
16.) Plug the unit back into appropriate power supply.
17.) After the cleaning and reassembly of the mixing parts and bowl as per above instructions, fill the bowl with a mix of water and an approved cleaning solution (example kay5), according to the measures specified.
18.) Start the mixing part of the machine for about 10 minutes to sanitize all parts. Follow the cleaning solution specifications.
19.) Drain the cleaning solution as follows:
• Unscrew the two knobs (F) see fig. U);
• then lower the bowl to drain out any remaining product through the dispensing valve (C)
(as shown in fig. U).
20.) Screw again the knobs (F) to fix the bowls.
21.) With a clean cloth wash the underside of the lamp cover with warm water and a mild detergent. Allow this part to air dry and then wipe it with a clean cloth which has been dipped in the sanitizing mixture. Prepare a minimum of 4 gallons (15 liters) of sanitizing solution (Stera Green Label or equivalent) following the manufacturer’s instructions.
Note: Add 4 ounces of Stera Sheen to 4 gallons (15 liters) of 120° Fahrenheit
(50° Centigrade) water to achieve a concentrate of 100 parts per million.
Warning: Lamp cover must be unplugged. Electric shock
could occur if cover or power cord come in contact with solution.
Maintenance
Removing and cleaning the filter (Weekly)
This should be done weekly or more often if necessary.
In order to guarantee an efficient refrigerating system, it is essential that the filter be properly cleaned, according to the following procedures:
1) Unplug the machine.
2) Unscrew the knob (K) in order to remove back panel (see fig. FF).
3) Remove the filter (W) held inside the back panel (X) and clean
it properly using water or vacuum (see fig. GG).
4) Place the cleaned filter back inside back panel and reinstall the back
panel on the machine by screwing in the knob (K).
(Figure FF)
(Figure GG)
Warning: Disconnect the unit from its power supply prior to
performing any maintenance procedures. Failure to do so could result in electric shock, injury from hazardous moving parts or serious burns from hot surfaces.
Attention: Failure to maintain a clean filter and condenser will
cause damage to the unit not covered by warranty.
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(Figure EE)
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