Crathco G23-2B Visual 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
   Attention: Shipping pin attached to tag located behind each bowl must be removed before starting machines.
   • 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).
     
     
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

Attention: Before inserting the plug into the electrical outlet, carefully read the following precautions.

• 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.

Attention: Altering the cord or plug will void the warranty.

• 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.

Preparing Product

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. 

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.

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.

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.
   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
5. 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).
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 (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 time setting 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.

Dispensing Product

To dispense the product, position the cup under the dispensing valve (C) and lower the dispensing lever (B) (see fig. O).

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.

Adjustments

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.

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).
   

Cleaning and Sanitizing Procedures

Warning: Disconnect the unit from its power supply prior to cleaning or sanitizing the unit. Failure to do so may result in electric shock.

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). Remove the bowl (L) by unscrewing the two knobs (F) and pulling it downwards as shown in fig. U.
     
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.
   
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 cylinder 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.
    
    • The lower right and left bowl flanges should fit on the outside of each black triangle edge (see fig. AA). The lid cover will not fit properly if this is not correctly 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.
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

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.

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)
   Attention: Failure to maintain a clean filter and condenser will cause damage to the unit not covered by warranty.

Cleaning the Condenser (Monthly)
This cleaning should be done monthly or more often if necessary. In order to guarantee an efficient refrigerating system, it is essential that the condenser be properly cleaned at regular intervals, according to the following procedures:

• Unplug the machine.
• Remove the back panel and filter. Using a dry brush or vacuum, remove the dust that has accumulated between the fins of the condenser (see fig HH).
  
  

Replacing the Lightbulbs (As Needed)

• Unplug the machine.

Lid Lights

• Unplug the cord to the lid and remove the lid from the machine.
• In order to access the lightbulb in the merchandising cover, insert a quarter in the slot on the small panel on the top of the cover (DA) and rotate the quarter to pop the panel open (see fig. II).
  
• Holding the merchandising cover with the top open, carefully remove the lightbulb (see fig. JJ).
  
• Insert the new bulb and replace the light cover.
• Place lid on machine and plug lid cord back into lid.

Rear Merchandiser Lights

• In order to access the lightbulb from the rear back-lit merchandiser (BB), remove the rear merchandiser by sliding it upwards (see fig. KK).
  
  NOTE: Some units may have dual rear backlit merchandiser panels, these function in the same manner as the single panel rear merchandisers.
• Then remove the lightbulb(s) (BA) (see fig. LL).
  
• Insert the new bulb(s) (BA).
• Reassemble the rear back-lit merchandiser (AA) making sure that its slots are inserted properly in the relevant brackets (CA) (see fig. LL).
• Plug machine into dedicated outlet.

Seal Maintenance

Bell Shaped Seal

• Replace every 1 to 6 months depending on conditions of use and level of maintenance and lubrication. This part should be lubricated during re-assembly after every cleaning.
  Spindle Bushing Seal
• Replace every 6 to 12 months depending on conditions of use and level of maintenance. Replacement of spindle bushing should ONLY be done by a qualified service technician.
  To Replace Spindle Bushing:
  Tools required: Power screwdriver, Rubber mallet, Replacement Kit #90104, spindle bushing extraction tool
  #90544

Each PM kit # 90104 contains 2 bell shaped shaft seals, 2 spindle bushing seals, 4 dispense valve o-rings, 1 laminated care and cleaning card and one PM checklist.

1. Empty product bowl and disassemble as if for cleaning. Spindle bushing seals should be replaced every 6-12 months and bell-shaped shaft seals should be replaced once every 1-6 months depending on conditions of use and maintenance.
2. Slide the threaded metal cylinder on the drive shaft so that the flat surface meets the face of the evaporator cylinder.
3. Thread the two tapping screws (max length 1 1/8”) through the holes in the tool and into the spindle bushing seal. Use of a power screwdriver is suggested. (See Figure MM)
   
4. Screw the outer cylinder of the extracting tool on to the metal cylinder by rotating clockwise until it is fully connected.
5. Continue turning the outer cylinder clockwise until the spindle bushing seal is removed. If necessary, apply higher torque by inserting a screwdriver in the holes of the outer cylinder. (See Figure NN)
   
6. After extracting the old spindle bushing seal, position a new one in the evaporator cylinder. The gasket (black side) should be facing the inside of the evaporator.
7. Position the inserting pipe so that it’s smaller diameter touches the spindle bushing seal.
8. Push the spindle bushing seal in by tapping on the pipe with a rubber mallet. Be sure the spindle bushing seal is completely in place. (See Figure OO)
   
9. Reassemble bowl.

When replacing the spindle bushing be sure to check the condition of the driveshaft. If the surface is not smooth and the driveshaft is not secure, then replace the driveshaft while replacing the spindle bushing. Replacement of a driveshaft should only be done by a qualified service technician using PM kit #90110.

Bowl Gasket (located at rear of bowl)

• Replace as necessary depending on the conditions of use and level of maintenance. This part should be lubricated during re-assembly after every cleaning.

O-Ring Maintenance

• O-rings should be replaced every 6 to 12 months or as necessary where wear is apparent.

A preventive maintenance visit should be performed every 6 months. In addition, air filter should be cleaned weekly, and every three months the condenser should be cleaned, and the rubber shaped bell shaft seals should be replaced. Failure to complete PM’s every 6 months is considered abuse of the machine, and therefore voids the warranty. Proof of PM must be documented with Grindmaster Corporation to maintain warranty coverage. To document your PM, complete this form with signatures, place used/worn parts that were replaced during the PM inside envelope, and mail to Grindmaster Corporation. Parts returned should include 2 evaporator seals, 2 rubber bell shaped shaft seals, valve o-rings and shafts (if applicable). First PM on serial numbers 11259 to 12202 should also include kit number 90225 (one per serial number).

The following procedures should be performed during a Preventative Maintenance visit, using PM kit # 90566 or 90110B.

• Document model and serial number of equipment and record above.
• Check product temperature and consistency for proper setting – adjust if necessary.
• Insure product is being mixed properly and is within specification (check and document brix – most products should be around 13% – refer to product manufacturer’s recommendations for exact recommended brix). Record Brix reading here: Left Bowl _____ Right Bowl _____
• Check for leaks at gaskets, o-rings, front shaft seal, etc.
• Empty product from bowls and disassemble unit completely.
• Clean and sanitize all disassembled parts.
• Clean and sanitize top tray and freezing barrel.
• Clean out condensation tube with sanitizer and long brush.
• Check condition of all panels, bowls, lids – replace if necessary.
• Check mixing rods and augers for wear, check mixing rod bearing for wear – replace if necessary.
• Check for bowl knobs (two per bowl to lock down bowl in front) – replace if necessary.
• Check operation of lights in lid and rear of unit (if equipped) – replace light bulbs if necessary.
• Clean re-usable air filter. Check condition of filter and replace if necessary.
• Clean condenser.
• Check condition of bowl gaskets and replace if necessary.
• Replace all o-rings on dispense valves and lubricate.
• Check drive shaft. Replace if necessary, using PM kit #90110B in place of 90566 above.
• Replace evaporator seal in front of evaporator. (use brass tool, included, to slide seal onto shaft, and use the white tool to tap seal into place. Be sure to lubricate seal with food grade grease first)
• Replace bell shaped rubber shaft seal on front of freezing barrel (generously lubricate inside seal)
• Lubricate parts where appropriate (dispense valve o-rings, inside of shaft seal, inner rim of bowl where it meets with the bowl seal)
• Re-assemble unit and refill with product
• Verify and document defrost timer setting and operation and time of day setting and adjust if necessary.
• Check thermostat setting on MG models. Thermostat setting should be between 1-1/2 and 2.
• Verify compressor operation and freezer controller operation.
• Verify ventilation is adequate (8” on both sides and back)
• Check electrical connections and wiring.
• Check fan operation (1 condenser fan and 2 gear motor fans) and clean fan or blades if necessary.
• Review proper periodic care and cleaning instructions (disassembly, cleaning, sanitizing, lubrication and re-assembly) with store personnel. Review proper product mixing and handling instructions with store personnel Demonstrate and train store personnel to follow proper procedures (stress importance of store level maintenance such as lubrication and filter cleaning).
• Make sure store personnel have appropriate supplies (lubricant and sanitizer) to care for machine.

A preventive maintenance visit should be performed every 3 months. Failure to complete PM’s every 3 months is considered abuse of the machine, and therefore voids the warranty. Proof of PM must be documented with Grindmaster Corporation to maintain warranty coverage. To document your PM, complete this form with signatures, place used/worn parts that were replaced during the PM inside envelope, and mail to Grindmaster Corporation. Parts returned should include 2 spindle bushing evaporator seals, 2 rubber bell shaped shaft seals, valve o-rings and shafts (if applicable).

The following procedures should be performed during a Preventative Maintenance visit, using PM kit # 90104:

• Document model and serial number of equipment and record above.
• Check product temperature and consistency for proper setting – adjust if necessary.
• Insure product is being mixed properly and is within specification (check and document brix – most products should be around 13% – refer to product manufacturer’s recommendations for exact recommended brix).
  Record Brix reading here: Left Bowl _____ Right Bowl _____
• Check for leaks at gaskets, o-rings, front shaft seal, etc.
• Empty product from bowls.
• Disassemble unit completely.
• Clean and sanitize all disassembled parts.
• Clean and sanitize top tray and freezing barrel.
• Clean out condensation tube with sanitizer and long brush.
• Check condition of all panels, bowls, lids – replace if necessary.
• Check mixing rods and augers for wear, check mixing rod bearing for wear – replace if necessary.
• Check for bowl knobs (two per bowl to lock down bowl in front) – replace if necessary.
• Check operation of lights in lid and rear of unit (if equipped) – replace light bulbs if necessary.
• Clean re-usable air filter if so equipped (standard on G & MG models, optional on ID models). Check condition of filter and replace if necessary.
• Clean condenser.
• Check condition of bowl gasket and replace if necessary.
• Replace all o-rings on dispense valves and lubricate.
• Check drive shaft. If surface is not smooth or the drive shaft is not secure (excessive movement in and out) use PM kit #90110, or 90110B in place of 90104 above.
• Replace spindle bushing seal in front of evaporator using extraction tool.
• Replace bell shaped rubber shaft seal on front of freezing barrel (generously lubricate inside seal)
• Lubricate parts where appropriate (dispense valve o-rings, inside of shaft seal, inner rim of bowl where it meets with the bowl seal)
• Re-assemble unit and refill with product
• Verify and document defrost timer setting and operation and time of day setting and adjust if necessary.
• Check thermostat setting on ID and MG models. Thermostat setting should be between 1-1/2 and 2.
• Verify compressor operation and freezer controller operation.
• Verify ventilation is adequate (8” on both sides and back).
• Check electrical connections and wiring.
• Check fan operation (1 condenser fan and 2 gear motor fans) and clean fan or blades if necessary.
• Review proper periodic care and cleaning instructions (disassembly, cleaning, sanitizing, lubrication and
  re-assembly) with store personnel. Review proper product mixing and handli ng instructions with store personnel.
  Demonstrate and train store personnel to follow proper procedu res (stress importance of store level maintenance such as lubrication and filter cleaning).
• Make sure store personnel have appropriate supplies (lubricant and sanitizer) to care for machine.

Accessories (not included)

Security Kit Installation (Part # 3468)
Installing Locking Clip

1. Pinhead must be located on righthand side of valve, as shown.
2. The 0.125” slot, on the locking clip, lines up with the horizontal shelf on the valve body.
3. Insert the locking clips as shown.
4. Attach padlock in hole provided on the locking clip
   

Installing Security Straps

1. Hook straps under side edge of the bowl, beginning at the front of the bowl.
2. Slide the straps back on the bowl until the are firmly in place
3. Interlock straps above the bowl lid.
4. Attach the padlock
   

Autofills
Attach liquid autofill systems to your granita dispenser. Autofills minimize manual labor to mix and refill the unit, as well as maintain the product bowl at an attractive level.

Contact your local Grindmaster Corporation representative or Grindmaster Corporation customer service at 800-695-4500 for more information on any of the above accessories.

Troubleshooting Guide

The following procedures must be performed by a qualified service technician.

If you still need help, call our service department at 800-568-5715 Ext. 3 (Monday through Friday, 8 am – 6 pm EST) or an authorized service center in your area. Please have the model and serial numbers ready so that accurate information may be given.
Prior authorization must be obtained from Grindmaster Corporation’s Technical Services Department for all warranty claims.

Exploded View MG23-2B (115/60) (for units up to serial number 8195)

Exploded View G23-2B (115/60) (for units up to serial number 8195)

Exploded View G23-2B (115/60) (serial number 8195 and higher)

Exploded View MG23-2B (115/60) (serial number 8195 and higher)

Exploded View G235-2B (220/50)

Exploded View MG235-2B (220/50)

Exploded View G236-2B (220/60)

Exploded View MG236-2B (220/60)

Crathco Granita G & MG Series Parts List

GEAR MOTOR EXPLODED VIEW

REFRIGERATION DIAGRAM MODEL G SERIES (115V/220V)

REFRIGERATION DIAGRAM MODEL MG SERIES (115V)

REFRIGERATION DIAGRAM MODEL MG SERIES (220V)

ELECTRICAL DIAGRAM MODEL – MG SERIES (115)

ELECTRICAL DIAGRAM MODEL – MG SERIES (220V)

ELECTRICAL DIAGRAM MODEL – G SERIES (115V/220V)

CUSTOMER SUPPORT

Grindmaster® Coffee Grinders and Brewers
Espressimo® Espresso Machines
Crathco® Hot Beverage Dispensers
Crathco® Cold and Frozen Beverage Dispensers
American Metal Ware® Coffee and Tea Systems
Tel 502-425-4776
Fax 502-425-4664
1-800-695-4500
P.O. Box 35020
Louisville, KY 40232
USAwww.grindmaster.com
email: info@grindmaster.com

Documents / Resources

Crathco G23-2B Visual Granita Machine [pdf] Instruction Manual G23-2B Visual Granita Machine, G23-2B, Visual Granita Machine, Granita Machine, Machine

References

• User Manual