Cornelius JetSpray JS7 User Manual

JET SPRAY (COLD)  
TRAINING MANUAL  
CARBON DIOXIDE  
WATER  
SYRUP/CONCENTRATE  
MECHANICAL  
REFRIGERATION  
CONTROLS & ELECTRICAL  
Jet Spray (Cold) Training Manual  
TABLE OF CONTENTS  
INTRODUCTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1  
Preview Questions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1  
Key Things To Know / Do - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -2  
Overview - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3  
Product Description - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3  
Product Types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3  
Microban® - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -3  
Dimensions & Capacities - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4  
JS7 Dispensers: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4  
JT20 Dispensers: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4  
JT30 Dispensers: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4  
EJ1 Dispensers: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4  
J15 Dispensers: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -4  
Accessories - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -5  
SYSTEM DETAILS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6  
Water - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6  
Water Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6  
Mechanical - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6  
Pump Assembly / Spray Drive Assembly - - - - - - - - - - - - - - - - - - - - - - - - - - -6  
Whipper Assembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -6  
Whipper Conversion - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -7  
Spray Verses Circulate - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -8  
Refrigeration - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Cooling Thermostat - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Compressor - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Condenser - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Condenser Cleaning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Filter Replacement - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Condenser Fan - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Dryer - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -9  
Evaporators - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10  
Air Flow - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10  
Refrigeration Charging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10  
Controls and Electrical - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11  
Switches - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11  
Spray Drive Motor Assembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11  
Jet Spray (Cold) Training Manual  
TROUBLESHOOTING - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12  
No Spray - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12  
Pump assembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12  
Spray Drive Motor - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12  
Noise in Pump Assembly - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 13  
Impella Spacing - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 13  
Breaking Magnetic Lock - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 13  
Pinch Tube Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 13  
Bowl Leak - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 14  
Not Cooling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 14  
Thermostat - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 14  
Condenser Cleaning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 14  
Condenser Fan Motor - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15  
Condenser Fan Blade - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15  
System Leak - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15  
Refrigeration Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15  
ATTACHMENTS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19  
REVIEW - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 21  
Jet Spray (Cold) Training Manual  
INTRODUCTION  
1. PREVIEW QUESTIONS  
Check your current knowledge by taking a few minutes to answer the following questions:  
1. The 5 and 3-gallon bowl assemblies are interchangeable on certain models?  
_____ True _____ False  
2. Parts that contain Microban need not be cleaned on a regular basis?  
_____ True _____ False  
3. All visual cold units use only one type of circulator for all products that are dispensed  
from the machine? _____ True _____ False  
4. Is it possible to add a whipper assembly to a unit after a unit has been purchased and  
installed? _____ True _____ False  
5. The Spray Drive assembly needs to run in order to maintain proper product tempera-  
ture? _____ True _____ False  
© 2000, IMI Cornelius Inc.  
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Jet Spray (Cold) Training Manual  
2. KEY THINGS TO KNOW / DO  
Work Safely! Always unplug/disconnect the power to the dispenser before  
servicing, and get help lifting the unit if it must be removed from the  
counter !  
Make certain that you have adequate airflow around the unit for proper  
operation !  
Learn to use a good quality volt-ohm meter. Proper electrical trouble shoot-  
ing is impossible without it !  
Always read the installation and operation manuals before set up !  
Visual models are available in 3,5,8, and 15-gallon models !  
Whipper Assemblies are available for most models !  
Using the correct impella or circulator with the corresponding product will  
give you the best visual display for the sale of the product !  
When product is in the bowls, the refrigeration unit must be operating to  
preserve the integrity of the product !  
The Microban protection inhibits the growth of bacteria, mold, and mildew  
that cause odors and stains !  
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© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
3. OVERVIEW  
Cover  
Bowl  
Pump  
assembly  
Spray  
switch  
Refrigeration  
switch  
Dispense  
lever  
Grill/air vent  
Access panel  
Drip tray  
3.1 Product Description  
Product Types  
The visual cold drink dispenser can dispense a premixed drink from the follow  
beverage selections:  
Powder based (sport drinks and Icsotonic)  
Syrup based product (non-carbonated)  
Pulpy products (fresh juice from concentrates; orange juice, apple juice, grape-  
fruit juice, lemonade)  
Foamy products (ice teas, grape drinks)  
Microban®  
Microban is a tasteless, odorless, and colorless antimicrobial agent that inhibits  
bacterial and fungal growth that cause odors and stains on the Jet Spray unit.  
Microban is incorporated directly into the polymer used to mold the Jet Spray  
bowls. It augments proper equipment cleaning.  
© 2000, IMI Cornelius Inc.  
- 3 -  
Jet Spray (Cold) Training Manual  
3.2 Dimensions & Capacities  
JS7 Dispensers:  
Flavors: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - One  
Capacity: - - - - - - - - - - - - - - - - - - - - - - - - 5 gal. (19 L)  
Voltages: - - - - - - - - - - - - - - - - 115 volt/60 Hz, 240 volt/50 Hz  
Dimensions: - - - - - - - - - - - - - - - - 7 3/4W, 26 5/8H, 17D  
- - - - - - - - - - - - - - - - - - -197 mm W, 676 mm D, 432 mm D  
Shipping Weight: - - - - - - - - - - - - - - - - - - - 54 lbs. (24.5 kg)  
JT20 Dispensers:  
Flavors: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Two  
Capacity: - - - - - - - - - - - - - - - - - - - - - two 5 gal. (19 L)  
Voltages: - - - - - - - - - - - - - - - - 115 volt/60 Hz, 240 volt/50 Hz  
Dimensions: - - - - - - - - - - - - - - - - - 16W, 26 5/8H, 17D  
- - - - - - - - - - - - - - - - - - -407 mm W, 676 mm D, 432 mm D  
Shipping Weight: - - - - - - - - - - - - - - - - - - - - 75 lbs. (34 kg)  
JT30 Dispensers:  
Flavors: - - - - - - - - - - - - - - - - - - - - - - - - - - - - Three  
Capacity: - - - - - - - - - - - - - - - - - - - - three 5 gal. (19 L)  
Voltages: - - - - - - - - - - - - - - - - 115 volt/60 Hz, 240 volt/50 Hz  
Dimensions: - - - - - - - - - - - - - - - 24 1/2W, 26 5/8H, 17D  
- - - - - - - - - - - - - - - - - - -622 mm W, 676 mm D, 432 mm D  
Shipping Weight: - - - - - - - - - - - - - - - - - - - 93 lbs. (42.2 kg)  
EJ1 Dispensers:  
Flavors: - - - - - - - - - - - - - - - - - - - - - - - - - - - - Single  
Capacity: - - - - - - - - - - - - - - - - - - - - - - - - 8 gal. (30 L)  
Voltages: - - - - - - - - - - - - - - - - 115 volt/60 Hz, 240 volt/50 Hz  
Dimensions: - - - - - - - - - - - - - - - - - - - 16W, 31H, 18D  
- - - - - - - - - - - - - - - - - - -407 mm W, 788 mm D, 457 mm D  
Shipping Weight: - - - - - - - - - - - - - - - - - - - 79 lbs. (35.8 kg)  
J15 Dispensers:  
Flavors: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - One  
Capacity: - - - - - - - - - - - - - - - - - - - - - - - 15 gal. (57 L)  
Voltages: - - - - - - - - - - - - - - - - 115 volt/60 Hz, 240 volt/50 Hz  
Dimensions: - - - - - - - - - - - - - - - - - - - 16W, 31H, 18D  
- - - - - - - - - - - - - - - - - - -407 mm W, 788 mm D, 457 mm D  
Shipping Weight: - - - - - - - - - - - - - - - - - - - 79 lbs. (35.8 kg)  
- 4 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
3.3 Accessories  
Leg extension kit p/n S4056  
No Cup Contact p/n S6469  
Locking Kit p/n A3035 (JT-20), p/n A3036 (JT-30)  
Spray Drive Motor p/n A1753  
© 2000, IMI Cornelius Inc.  
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Jet Spray (Cold) Training Manual  
SYSTEM DETAILS  
1. WATER  
1.1 Water Quality  
Water quality has an affect on juice dispensing systems.  
odor  
taste  
clarity/foaming  
Water filtration is recommended to assure the best beverage taste.  
2. MECHANICAL  
2.1 Pump Assembly / Spray Drive Assembly  
All units designed to spray, including those with optional whippers, incorporate a  
unique refrigeration design that keeps drinks consistently colder at any bowl level.  
The beverage is constantly circulated through the pump housing over the cooling  
evaporators.  
2.2 Whipper Assembly  
Jet Spray's optional, patented whipper aerates and whips the beverage before it  
leaves the bowl. This exclusive whipping process is the most sanitary in the indus-  
try, keeping the beverage under refrigeration at all times, even during whipping.  
Each serving is individually whipped and overruns of 35%-40% are obtained with  
most specially formulated whipped drink bases.  
A simple external adjustment allows the amount of overrun or foam head to be  
varied as desired. The patented whipper is held securely in place magnetically and  
can be easily slipped in and out of the bowl for changeover from whipped to non-  
whipped drinks.  
If drinks are not being whipped:  
Make sure refrigeration switch is on.  
Assure the whipper motor runs when depressing the dispense lever.  
Make sure whipper chamber assembly is located in the proper position and  
resting flat on a base of bowl.  
Check whipper magnet. It should turn freely, if not, remove impella support  
pin and clean all parts with soap and water.  
- 6 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
Check whipper switch for adjustment. If moved too far forward, an air lock  
may occur, thereby breaking the magnetic lock between whipper motor and  
whipper chamber assembly.  
To adjust whipper switch, loosen screw to the right of the switch. Slide switch in  
slot to desired location.  
NOTE: When switch is moved to the forward position (out towards operator)  
whipper motor will come on with very little movement of the push handle.  
When switch is all the way back (towards front panel) whipper motor will  
not come on, even when the handle is pushed all the way back.  
2.3 Whipper Conversion  
1. Disconnect power.  
2. Drain bowl.  
3. Remove pinch tube, bowl, dispense lever, drip tray, switch cover plate, and  
front panel.  
4. Install washer and standoff into the whipper motor mounts on condensate tray.  
5. Install whipper motor assembly and fasten with 3 keps nuts.  
6. Wire according to diagram.  
NOTE: Use existing cable clamps and wire ties provided to route wires away from  
sharp edges and fan blade.  
7. Attach new wiring diagram to new front panel.  
8. Install new front panel with existing hardware.  
9. Install switch cover plate with switch to condensate tray in front of whipper  
motor assembly (use 10-32 x 1 1/4screw and spacer).  
10. Attach whipper decal on raised boss of condensate tray where whipper motor  
was installed.  
11. Replace bowl, new dispense lever, pinch tube, and whipper chamber assembly  
and drip tray. When placing the whipper assembly into the bowl, assure that it  
is located into the recess directly above the whipper decal. Then insert the 90°  
elbow into the pinch tube.  
12. Connect power, premix product, and add product to bowls.  
© 2000, IMI Cornelius Inc.  
- 7 -  
Jet Spray (Cold) Training Manual  
2.4 Spray Verses Circulate  
Certain products are not suited for spraying,  
including products that have pulp and those  
that foam. Jet Spray units can be retro-fitted  
with circulator assemblies for pulpy or  
foamy products.  
Circulator for foamy products #A1620,  
including ice tea and coffee from con-  
centrate and some juice.  
#A1620 foamy circulator  
Circulator for pulpy products #S6737,  
including orange juice from concen-  
trate, fresh squeezed lemonade, and any  
pulp based beverage.  
#S6737 pulpy circulator assembly  
- 8 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
3. REFRIGERATION  
3.1 Cooling Thermostat  
There is one thermostat on all of the cold product units. This thermostat is located  
against the evaporator coil of the unit. On the JT20 and JT30 units the thermostat is  
mounted against the right hand evaporator coil when facing the front of the unit.  
The cooling or frost pattern for the JT30 flows from the center to the left then to  
the right. Upon reaching a predetermined temperature, the unit will cycle. All ther-  
mostats are factory set and normally need no adjustment.  
3.2 Compressor  
Moves the refrigerant through the system. Pressurizes the refrigerant for heat dissi-  
pation in the condenser and ultimately heat removal by evaporation in the bowls  
evaporator.  
3.3 Condenser  
Dissipates heat from the compressor and prepares the high pressure refrigerant for  
the capillary tube and ultimately the evaporator.  
3.4 Condenser Cleaning  
It is very important to do this on an annual basis and as required. The condenser  
can be cleaned with a brush or compressed air. There are commercial condenser  
cleaners on the market that are acceptable.  
3.5 Filter Replacement  
The Jet Spray unit comes with a foam type filter mounted on the inside of the side  
panel assembly. JT30 models have a filter mounted inside the rear panel of the  
chassis. These filters should be periodically removed and washed in warm soapy  
solution to remove dust and derbies.  
3.6 Condenser Fan  
Draws air through the condenser coils and over the compressor to facilitate heat  
removal.  
3.7 Dryer  
Cleans and removes moisture from the refrigeration system. The dryer should  
always be replaced whenever servicing or opening a refrigeration system. When  
ordering a dryer, specify model number and refrigerant type (or serial number) to  
insure the correct dryer is received.  
© 2000, IMI Cornelius Inc.  
- 9 -  
Jet Spray (Cold) Training Manual  
3.8 Evaporators  
There are two types of evaporators on the Jet Spray cold products, coil and dome.  
It is important on both to remember to keep product above the top of the coils to  
insure proper cooling of the product and correct operation of the cooling system.  
Sometimes there is an ice build up around the evaporator. This is normal.  
When operating a multiple bowl unit, it is necessary to have liquid above the level  
of the evaporators in each bowl, this balances the refrigeration unit. Never run with  
an empty bowl, fill with water if product is unavailable.  
3.9 Air Flow  
It is very important to make sure that there is adequate air circulation around the  
machine. There should be a minimum of three inches of space all around the unit.  
Refer to the installation and owners manuals for additional information.  
3.10 Refrigeration Charging  
Charging the capillary tube controlled system requires accurate charging equip-  
ment and technique. The amount of refrigerant in the system determines the oper-  
ating pressures and temperature of the evaporators. It is necessary to utilize a  
refrigerant scale or graduated charging cylinder when charging the system.  
Load, ambient temperature, and operating conditions affect sealed system operat-  
ing pressures. If the unit appears under charged, check for a dirty condenser. If the  
unit is running constantly but not cooling, the problem may be a low charge. If a  
low charge is suspected, it is recommended that the system is evaluated and leak  
tested.  
NOTE: Hooking up a high side hose to a system with a low charge causes a quarter  
or more of the charge to backup into the hose. This results in an incorrect  
reading. This is why operating pressures are not normally published.  
- 10 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
4. CONTROLS AND ELECTRICAL  
4.1 Switches  
Separate spray and refrigeration switches are located on the front of each dis-  
penser, excluding the JS7, JW6, and JW5. There are separate switches for each  
side of multi-bowl models.  
These switches can be tested by checking the continuity from one terminal to the  
other. They are either open or closed depending upon the position of the switch.  
4.2 Spray Drive Motor Assembly  
To avoid electrical shock and death, use extreme caution when the access  
panels are removed and the power is ON.  
The spray drive motor assembly is located under the condensate tray. It is accessed  
by removing the front panel.  
Check to see if the motor shaft and magnet are rotating. Visually inspect the spray  
drive motor.  
If the power is ON and the motor is not rotating, check for line voltage at the termi-  
nal board.  
If power is present and the motor is not rotating, the motor will need to be removed  
to check for continuity.  
Disconnect power to the unit before removing the motor.  
The spacing of the drive assembly and the underside of the condensate tray are  
very important. Current production spray drive motor assemblies do not utilize the  
spacing lugs that are mounted in older units. When replacing the spray drive motor  
assemblies it is important to check for existing lugs. If they are present remove as  
per the instruction sheet that is included with the replacement part.  
$''ꢀ3,&785(ꢀ  
2)ꢀ/8*6  
© 2000, IMI Cornelius Inc.  
- 11 -  
Jet Spray (Cold) Training Manual  
TROUBLESHOOTING  
1. NO SPRAY  
1.1 Pump assembly  
Be sure the spray switch is ON  
Check impella magnet. Impella should spin freely. If it does not, remove and clean  
both impella and support pin.  
NOTE: Check that the Impella assembly is in upright position, fins facing upward.  
Sugar and solids can crystallize and cause impella to bind. Do not allow these  
materials to dry on parts.  
Bearing in impella could be worn causing impella to scrap the base of the bowl.  
Replace the impella assembly.  
NOTE: Switch must be OFF when inserting the impella into the bowl to insure  
magnetic coupling.  
Long pieces of pulp may plug impella and bind the impella blades. Juices with  
excessive pulp must be strained in order to spray. If it is desired to retain pulp, use  
the Jet-Spray Circulator #S6737 in place of the pump.  
With the JS/JT/JWT series, assure that the pump housing is locked into place. If  
either of the tabs located on the bottom perimeter of the pump housing assembly  
are broken, the pump will not spray properly. With the TJ/EJ/J15 series, the pump  
cover should be locked under all three bowl lugs. If any of these are broken the  
pump will not spray properly and will vibrate and be noisy. Replace the bowl  
assembly or use the Jet-Spray Circulator #S6737.  
1.2 Spray Drive Motor  
To check the spray power source, remove front splash panel or side panels,  
depending on the model, by removing the screws. This will expose the spray drive  
assembly. The drive assembly must spin freely. If shaft or magnet rubs or binds,  
adjust or replace it.  
The spray drive motor must run in a counterclockwise direction.  
If the motor is stopped or not up to speed it will affect circulation and temperature  
of the drink. Replace spray switch or spray drive motor.  
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© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
2. NOISE IN PUMP ASSEMBLY  
2.1 Impella Spacing  
Correct installation and maintenance of the impella is very important to efficient  
operation and the appearance of the product in the bowl.  
2.2 Breaking Magnetic Lock  
The operation of the spray drive motor and impella is simple. The two magnets,  
one on the spray drive motor and one on the impella assembly, lockthese com-  
ponents together. When that lock is broken it creates noise and/or an improper  
pumping action. The alignment of the two components is to correct and efficient  
operation.  
Problems that cause that loss of magnet alignment include:  
Improper product mix  
Worn bearing on the impella unit  
Worn impella pin or shaft  
Bowl assembly not correctly seated on the chassis  
Impella installed upside down  
Pumps not being run, allowing solids to settle in the bottom of the bowl.  
Both the pump refrigeration switches should be on whenever product is in the  
bowl.  
3. PINCH TUBE INSTALLATION  
1. Remove pinch tubes from the plastic bag and wash with warm and mild deter-  
gent or soap.  
2. Visually check for cuts or holes in the pinch tube assembly.  
3. Wet bowl spout surface and sealing rings on the pinch tube.  
4. With one hand, push back dispense lever until it touches the front panel. With  
the other hand, pick up pinch tube and carefully insert tube into bowl spout  
opening, and into lower handle support spout. Make sure end of tube does not  
get caught on edge above handle support spout opening.  
5. Push pinch tube into bowl spout opening with thumb. When end of tube passes  
beyond bottom of dispense lever support spout opening, pull end of tube for  
final seating of pinch tube top into bowl spout seat. Make sure the tube is free  
of wrinkles. Tube should extend ¼" below support spout.  
6. Install other pinch tubes on the unit if needed.  
© 2000, IMI Cornelius Inc.  
- 13 -  
Jet Spray (Cold) Training Manual  
4. BOWL LEAK  
NOTE: Do not confuse condensation drippings on the outside of the bowl as leaks.  
High humidity causes more condensation.  
1. Be sure the gaskets are properly placed in the grooves on the bowl and that  
there are no tears or cuts in the gaskets.  
2. Check for foreign material around domes where gaskets seat.  
3. Check pinch tubes for holes or tears above the pinch off area, or for improper  
insertion.  
4. Be sure condensate washers are around bowl spouts. Condensation will run  
down the bowl spout/pinch tube area giving the appearance of leaks if they are  
not in place.  
5. NOT COOLING  
5.1 Thermostat  
The thermostat is pre-set at the factory and will not normally require resetting. The  
unit will automatically cycle between the high and low temperatures of the ther-  
mostat.  
A continuity check of the thermostat will determine if it has failed.  
Be sure to replace the thermostat capillary tube to the correct depth in the thermal  
well. This is essential to the sensing of the correct evaporator temperature.  
The capillary tube well is sealed with a permagum sealant to protect the bulb of the  
thermostat from being affected by internal or ambient temperature changes.  
NOTE: These thermostats can and often due contain a caustic solution  
within the bulb and should be disposed of in a professional manner to  
prevent injury or damage.  
5.2 Condenser Cleaning  
The condenser must be cleaned periodically to insure efficient operation. The fre-  
quency of cleaning will depend on the location. No applicable buildup on the con-  
denser fins should be allowed.  
1. Turn switch OFF and unplug the unit.  
2. Remove right or left side panel (plus back panel on JT30 model) and clean thor-  
oughly.  
3. With a stiff bristle brush or vacuum cleaner, clean condenser. Be sure no loose  
dirt goes into the dispenser.  
- 14 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
4. Replace side panels and restart unit.  
5.3 Condenser Fan Motor  
The condenser fan motor is sealed at the factory and needs no lubrication. The  
motor can be checked in two ways; check for continuity, and check to see that  
power is present at the terminal block or terminal strip.  
5.4 Condenser Fan Blade  
The condenser fan blade pulls air through the condenser. If the blade is damaged or  
is not positioned correctly in the condenser shroud, the blade will not pull or push  
the correct amount of air to cool the condenser coil, reducing refrigeration effi-  
ciency.  
5.5 System Leak  
Symptoms of a refrigerant leak include a running compressor with a hot suction  
line and the compressor running excessively hot, and an increased amp draw by  
the compressor. A sweep of the refrigeration system is necessary to determine if  
there is a leak.  
If there is a leak in the system, it must be evacuated and repaired by an certified  
refrigeration technician. The system must then be pulled down to a vacuum and  
recharged with the correct level of refrigerant.  
6. REFRIGERATION TROUBLESHOOTING  
PROBLEM (fault)  
CAUSE (diagnosis)  
ACTION (remedy)  
1. Compressor will not  
start, no humming  
noise  
A. Line disconnect switch A. Close start or discon-  
open  
nect switch  
B. Fuse removed/blown  
B. Replace fuse  
C. Overload protection  
tripped  
C. Refer to electrical ser-  
vicing  
D. Control stuck in open  
position  
D. Repair or replace con-  
trol  
E. Control OFF due to  
cold location  
E. Relocate control  
F. Wiring improper or  
loose  
F. Check wiring against  
diagram  
© 2000, IMI Cornelius Inc.  
- 15 -  
Jet Spray (Cold) Training Manual  
PROBLEM (fault)  
CAUSE (diagnosis)  
ACTION (remedy)  
2. Compressor will not  
start hums but trips  
overload protector  
A. Improperly wired  
B. Low voltage to unit  
C. Relay not closing  
D. Compressor motor  
winding open or  
shorted  
A. Check wiring against  
diagram  
B. Correct problem  
C. Correct problem  
D. Replace compressor  
E. Internal mechanical  
trouble in compressor  
E. Replace compressor  
F. Liquid refrigerant in  
compressor  
F. Add crankcase heater  
and/or accumulator  
3. Compressor starts but  
start winding does not  
switch off  
A. Improperly wired  
A. Check wiring against  
diagram  
B. Correct problem  
C. Correct problem  
B. Low voltage to unit  
C. Relay failed to open  
D. Excessively high dis-  
charge pressure  
D. Check discharge shut-  
off valve, possible  
overcharge, or insuffi-  
cient condenser cooling  
E. Compressor has wind-  
ing open or shorted  
E. Replace compressor  
F. Internal mechanical  
trouble in compressor  
F. Replace compressor  
4. Compressor starts but  
then short-cycles on  
overload protector  
A. Additional current  
passing thru overload  
protector  
A. Check wiring diagram;  
check for added fan  
motors, pumps, etc.  
connected to wrong  
side of connector  
B. Overload protector  
defective  
B. Check current, replace  
protector  
C. Excessive discharge  
pressure  
C. Check ventilation,  
restrictions in cooling  
medium or refrigera-  
tion system  
D. Suction pressure too  
high  
D. Check for possible mis-  
application, use stron-  
ger unit  
E. Compressor too hot,  
return gas hot  
F. Compressor has wind-  
ing open or shorted  
E. Check refrigerant  
charge and add if nec-  
essary (fix leak first)  
F. Replace compressor  
- 16 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
PROBLEM (fault)  
CAUSE (diagnosis)  
ACTION (remedy)  
5. Unit runs OK but short- A. Overload protector  
cycles on  
A. See Compressor starts  
but then short-cycles  
on overload protector”  
above  
B. Thermostat  
B. Widen differential  
6. Unit operates long or  
continuously  
A. Refrigerant low  
B. Control contacts stuck  
closed  
A. Fix leak and charge  
B. Clean contacts or  
replace control  
C. Refrigerated or air con- C. Correct problem  
ditioned space has  
excessive load or poor  
insulation  
D. System is inadequate to D. Replace with larger  
handle the load  
system  
E. Evaporator coil iced  
E. Defrost  
F. Restriction in refrigera- F. Determine location and  
tion system  
G. Dirty condenser  
H. Filter dirty  
remove  
G. Clean condenser  
H. Clean or replace filter  
7. Relay defective or  
burned out  
A. Incorrect relay  
A. Replace with correct  
relay  
B. Remount in correct  
position  
B. Incorrect mounting  
angle  
C. Line voltage too high  
or low  
C. Correct problem  
D. Excessive short cycling D. Correct problem (see  
Unit runs OK but  
short-cycles onabove)  
E. Relay mounting loose  
E. Mount correctly  
F. Incorrect run capacitor F. Replace with correct  
capacitor  
8. Suction line frosted or  
sweating  
A. Refrigerant overcharge A. Correct charge  
9. Liquid line frosted or  
sweating  
A. Restriction in dehydra- A. Replace bad part  
tor or strainer  
© 2000, IMI Cornelius Inc.  
- 17 -  
Jet Spray (Cold) Training Manual  
PROBLEM (fault)  
CAUSE (diagnosis)  
ACTION (remedy)  
A. Tighten  
9. Unit noisy  
A. Loose parts or mount-  
ing  
B. Tubing rattle  
C. Bent fan blade vibrat-  
ing  
B. Reform tubing  
C. Replace blade  
D. Worn fan motor bear-  
ings  
D. Replace motor  
- 18 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
ATTACHMENTS  
The following attachments should be included with this lesson:  
JetSpray Care And Cleaning Instructions  
© 2000, IMI Cornelius Inc.  
- 19 -  
Jet Spray (Cold) Training Manual  
Microban Antibacterial Protection  
- 20 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
REVIEW  
DATE: _______________________________________________  
NAME: _______________________________________________  
LOCATION: __________________________________________  
The following questions summarize important points in this training lesson.  
1. It is acceptable to run the system with only one of the two bowls with product in it.  
_____ True  
_____ False  
2. Pinch tubes should be cleaned regularly and replaced twice a year.  
_____ True  
_____ False  
3. Whipper assemblies are can not be added to a unit after it has left the factory.  
_____ True  
_____ False  
4. Plastic components are dishwasher safe.  
_____ True  
_____ False  
5. Microban is tasteless, colorless, and odorless.  
_____ True  
_____ False  
6. With Microban added to components it is no longer necessary to clean and sanitize  
units.  
_____ True  
_____ False  
7. Describe the three types of circulators for Jet Spray units.  
____________________________________________________________________  
____________________________________________________________________  
____________________________________________________________________  
____________________________________________________________________  
© 2000, IMI Cornelius Inc.  
- 21 -  
Jet Spray (Cold) Training Manual  
8. What direction does the refrigerant flow during initial startup?  
____________________________________________________________________  
____________________________________________________________________  
9. What direction does the refrigerant flow during the cooling cycle?  
____________________________________________________________________  
____________________________________________________________________  
10. When do thermostats need to be adjusted?  
____________________________________________________________________  
____________________________________________________________________  
11. Do pump assemblies need to be inside the bowl to keep the product cool?  
____________________________________________________________________  
____________________________________________________________________  
12. Ice buildup on the evaporator is:  
A. normal  
B. due to the thermostat being set too low  
C. an indication of improper product mix  
D. all of the above.  
13. It is recommended that the pump mix the product instead of pre-mixing it.?  
_____ True  
_____ False  
- 22 -  
© 2000, IMI Cornelius Inc.  
Jet Spray (Cold) Training Manual  
NOTES:  
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_______________________________________________________________________  
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© 2000, IMI Cornelius Inc.  
- 23 -  
IMI Cornelius, Inc.  
Part No. TP00936  
March 9, 2000  

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