Bunn SILVER SERIES JDF 4S User Manual

JDF-2S  
JDF-4S  
Silver Series  
INSTALLATION & OPERATING MANUAL  
BUNN-O-MATIC CORPORATION  
POST OFFICE BOX 3227  
SPRINGFIELD, ILLINOIS 62708-3227  
PHONE: (217) 529-6601 FAX: (217) 529-6644  
and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper  
copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.  
39992.0000A 04/07 ©2007 Bunn-O-Matic Corporation  
USER NOTICES  
Carefully read and follow all notices on the equipment and in this manual. They were written for your protec-  
tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels.  
00986.0002  
27442.0000  
This equipment must be installed to comply with the  
Basic Plumbing Code of the Building Officials and  
Code Administrators International, Inc. (BOCA) and  
the Food Service Sanitation Manual of the Food and  
Drug Administration (FDA). For models installed  
outside the U.S.A., comply with the applicable  
Plumbing /SanitationCode.  
00656.0000  
12559.0003  
CHARGE  
Type R134A, Amount 9 oz (255 gm)  
Design Pressures: High 255 psi (15.5 bar)  
Low 36 psi (2.5 bar)  
33461.0001  
JDF-2S  
CHARGE  
Type R134A, Amount 10 oz (283 gm)  
Design Pressures:  
High 335 psi (23 bar) (2.31 MPa)  
Low 88 psi (6 bar) (0.61 MPa)  
33461.0000  
JDF-4S  
39992 042007  
3
INITIAL SET-UP  
CAUTION: The dispenser is very heavy! Use care when lifting or moving it. Use at least two people to lift or  
move the dispenser. Place dispenser on a sturdy counter or shelf able to support at least 150 lbs. (68 kg). This  
dispenser is designed for indoor use only.  
Set the dispenser on the counter where it will be used. This dispenser requires a minimum of 4 inches (102  
mm) of air clearance at the rear and 8 inches (203 mm) of air clearance above the dispenser. Minimal clearance  
is required between the dispenser sides and the wall or another appliance. For optimum performance, do not let  
warm air from surrounding machines blow on the dispenser. Leave some space so the dispenser can be moved  
for cleaning.  
ELECTRICAL REQUIREMENTS  
CAUTION: The dispenser must be disconnected from the power source until specified in Electrical Hook-Up.  
The 120V rated dispensers have an attached cord set and require a 2-wire, grounded, individual branch circuit  
rated 120 volts ac, 15 amp, single phase, 60Hz. The mating connector must be a NEMA 5-15R.  
The 230V rated dispenser has an attached cord set and requires an attachment plug cap rated at least 230  
volts ac, 15 amp. The attachment plug cap must meet with applicable national/local electrical codes.  
Refer to the data plate for exact electrical requirements.  
ELECTRICAL HOOK-UP  
CAUTION: Improper electrical installation will damage electronic components.  
1. An electrician must provide electrical service as specified.  
2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.  
3. Confirm that the refrigeration switch on the rear of the dispenser is in the OFF position.  
4. Connect the dispenser to the power source.  
5. If plumbing is to be hooked up later, be sure the dispenser is disconnected from the power source. If plumb-  
ing has been hooked up, the dispenser is ready for Initial Fill.  
PLUMBING REQUIREMENTS  
This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 100  
psi (138 and 690 kPa). This water source must be capable of producing a minimum flow rate of 3 fluid ounces  
(88.7 milliliters) per second. A shut off valve should be installed in the line before the dispenser. Install a regu-  
lator in the line when pressure is greater than 100 psi (690 kPa) to reduce it to 50 psi (345 kPa). The regulator  
is also necessary if the water source has pressure fluxuations. The main water inlet is a 3/8” (9.52 mm) MFL  
connection.  
NOTE- At least 18 inches (457 mm) of an FDA approved flexible beverage tubing, such as reinforced braided  
polyethylene, before the dispenser will facilitate movement to clean the countertop. It can be purchased direct  
from BUNN-O-MATIC (part number 34325.10_ _ [see Illustrated Parts Catalog for complete part number.])  
BUNN-O-MATIC does not recommend the use of saddle valves to install the dispenser. The size and shape of the  
hole(s) made in the supply line(s) by saddle valves may restrict water flow.  
This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials  
and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the  
Food and Drug Administration (FDA). For models installed outside the U.S.A., you must comply with  
the applicable Plumbing/Sanitation Code for your area.  
39992 042007  
4
DOOR COVER INSTALLATION  
1. Install door cover by first plugging the door harness connector into the machine harness connector located  
at the bottom of the machine door.  
P3577  
P3577  
JDF-4S  
JDF-2S  
2. Install door cover.  
P3578  
P3578  
JDF-4S  
JDF-2S  
3. Secure the door cover using 5 screws provided.  
P3840  
P3579  
JDF-4S  
JDF-2S  
39992 042007  
5
PLUMBING HOOKUP  
The plumbing connection is located on the rear of the dispenser. A 3/8" (9.52 mm) male flare adapter fitting  
is supplied, installed on the rear of the dispenser.  
P3841  
P3580-1  
FIG 2 Plumbing Connections - JDF-4S  
FIG 1 Plumbing Connections - JDF-2S  
INITIAL FILL  
CAUTION: The dispenser must be disconnected from the power source throughout the initial fill except when  
specified in the instructions.  
1. Remove drip tray assembly and splash panel from the dispenser. Replace the drip tray.  
2. Connect the water source to the back of the dispenser.  
3. Pull the fill tube from the dispenser, remove the plug and connect it to the dispense nozzle.  
4. Place the Dispense Lockout switch in the OFF position.  
5. Connect dispenser to the power source. Press and hold the dispense button for the dispense station that the  
tube is connected to for 10 seconds, until you hear the water valve turn on.  
6. Monitor the water bath fill level until water starts to trickle from the overflow tube. Then press the dispense  
button again to stop the fill process.  
NOTE: The fill timer may time out before filling is complete. Press and hold the dispense button for 10 seconds  
to start again if needed.  
P3846  
P3581-1  
FIG 4 Initial Fill Hose - JDF-4S  
FIG 3 Initial Fill Hose - JDF-2S  
39992 042007  
6
INITIAL FILL (Continued)  
7. Turn ON the refrigeration switch at the back of the dispenser. This will start the water bath pump circula-  
tion.  
8. Check water level in the overflow tube and top off the tank if necessary (Step 5).  
9. Disconnect the fill tube and allow excess water to drain into the drip tray. Replace the plug in the end of the  
fill tube and store back into the dispenser.  
10. Place the Dispense Lockout switch back to the ON position.  
11. Replace the splash panel and drip tray.  
12. It will take several hours to create the ice bank required for full dispenser performance. During this time, some  
further trickling from the water bath is expected due to expansion caused by ice bank formation. While the  
refrigeration system is creating the ice bank, the dispenser may be readied for use as described in Loading,  
Priming and Adjustment.  
P3582  
P3842  
FIG 6 Initial Fill Connection - JDF-4S  
FIG 5 Initial Fill Connection - JDF-2S  
39992 042007  
7
LOADING  
Frozen Concentrates  
1. Thaw the frozen concentrate in a refrigerated 35-40 degrees F (1.6-4.4 degrees C) environment for 36 to 48  
hours before use.  
2. Thoroughly mix the thawed concentrate by vigorously shaking the product container.  
3. Open the dispenser door.  
4. Prior to placing the product container in the dispenser, make sure that the o-ring on the container adapter is  
lubricated. This will ease removal of the container when it becomes necessary.  
5. Place the product container in the desired position and press it firmly into the bottle adapter opening.  
6. Open the vent hole in the product container.  
Note: Concentrate in the container must be completely thawed and be within the temperature range of 35-40  
degrees F (1.6-4.4 degrees C.) Product outside of this temperature range, especially below, will produce an  
“out of brix” drink.  
Ambient Concentrates (Optional)  
1. Install an Ambient Concentrate Conversion Kit (BUNN-O-MATIC part number 33699.0001) per the instruc-  
tions provided in the kit.  
2. Attach the concentrate product hose to the appropriate concentrate line located at the rear of the dispens-  
er.  
3. Attach the other end of the product hose to the product container through an appropriate fitting.  
PRIMING  
1. Open the dispenser door  
2. Load concentrate per instructions in section titled Loading.  
3. Close the dispenser door.  
4. Place a large container under the appropriate dispense nozzle.  
Press and hold the “Product Dispense Switch” Fig 5, until concentrate dispenses from the dispense nozzle.  
Note: This may take several seconds, depending on the installation and set pump speed.  
39992 042007  
8
OPERATING CONTROLS  
Refrigeration Switch  
The refrigeration switch is located on the rear of the dispenser near the center. This switch controls power to the  
water bath pump and relay contacts for the compressor and condenser fan motor.  
P3841  
P3580-1  
FIG 8 Refrigeration Switch - JDF-4S  
FIG 7 Refrigeration Switch - JDF-2S  
P3844  
P3583  
FIG 9 Product Dispense Switches - JDF-2S  
A. Product Dispense Switch  
FIG 10 Product Dispense Switches - JDF-4S  
Pressing and holding switch will initiate product flow from the respective nozzle; releasing the switch will  
stop the flow.  
B. Dispense Lockout Switch (JDF-2S shown)  
This switch is located at the bottom front of the  
dispenser just behind the drip tray. It is used to turn  
ON and OFF the Dispensing function. It is also used  
for some programming and fill procedures.  
FIG 11 Dispense Lockout SwitPc3h612  
DISPENSER USE  
Press and Hold Dispensing:  
1. Place a cup on the drip tray beneath the desired dispensing nozzle.  
2. Press and hold the “Product Dispense” switch until the beverage reaches the desired level, then release.  
39992 042007  
9
OPERATING CONTROLS (Continued)  
Portion Control Option  
The dispenser is also equipped with a portion control option. The following steps will guide you through the set  
up process for this option. Portion control can be set on one or all dispense heads as needed.  
1. Unplug dispenser from power source.  
2. Place Dispense Lockout switch in the OFF position.  
3. Remove drip tray and splash panel from the front of the machine then replace the drip tray.  
4. Press and hold the left most (Station 1) dispense switch while plugging the dispenser into the power source.  
Continue holding dispense switch(s) until all 4 temperature LED’s, Figs. 12 and 13 on the circuit board start  
flashing slowly (this takes about 5 seconds). Release dispense switch(s).  
5. Press and release any dispense switch 6 times to enter the portion control set up mode. This will cause the  
4 temperature LED’s to flash rapidly.  
6. Place a container under the desired dispense nozzle to measure the portion size.  
7. Press and hold the desired dispense switch to dispense product until the desired amount of product is  
achieved. (Maximum dispense time is 25 seconds). Repeat this on all dispense heads as desired.  
8. Place Dispense Lockout switch back into the ON position. This will exit the Portion control set up mode.  
9. Place a container under the dispense nozzle(s) and press the dispense button to confirm that the portion size  
is set correctly. Repeat steps 1-8 if any changes are needed.  
10. Replace splash panel.  
Note: The portion control dispense can be cancelled during a dispense by pressing the dispense button again.  
Note: If a portion size is not set for a dispense head while in the portion control set up mode, that dispense head  
will remain a push and hold dispense head.  
39992 042007  
10  
OPERATING CONTROLS (Continued)  
Procedure to return all dispense heads back to Push and Hold mode:  
1. Unplug dispenser from power source.  
2. Place Dispense Lockout switch in the OFF position.  
3. Remove drip tray and splash panel from the front of the machine then replace the drip tray.  
4. For the JDF-2S, press and hold either dispense switch while plugging the dispenser into the power source.  
For the JDF-4S, press and hold two left dispense switches while plugging the dispenser into the power  
source. Continue holding dispense switch(s) until all 4 temperature LED’s on the circuit board start flashing  
slowly (this takes about 5 seconds). Release dispense switch(s).  
5. Press and release any dispense switch three times.  
6. Place Dispense Lockout switch back into the ON position.  
7. Replace splash panel and drip tray.  
8. Place a container under each dispense nozzle and press dispense buttons to confirm machine is operating  
in push and hold mode.  
P3585  
P3845  
FIG 12 Temperature LEDs JDF-2S  
FIG 13 Temperature LEDs JDF-4S  
39992 042007  
11  
CLEANING & PREVENTIVE MAINTENANCE  
Daily: Rinse Procedure  
Tools required: 32 oz. (946 ml) minimum empty container  
1. Open refrigerated compartment door and remove product containers.  
2. Fill a clean container with warm water and place the container into the cabinet and press it firmly into the  
bottle adapter opening.  
3. Close the door, place an empty container under the dispensing nozzle and press the dispense switch until  
clear water flows from the dispense nozzle.  
4. Repeat steps 1 - 3 for all dispense stations.  
Daily: Parts Washing  
1. Remove and wash the dispense nozzle(s), mixing element(s), drip tray and drip tray cover in a mild detergent  
solution. Rinse thoroughly.  
2. Wipe splash panel, areas around dispense nozzle(s), and refrigerated compartment with a clean, damp  
cloth.  
Weekly: Semi-Automatic Sanitize Process  
Tools required: 1 empty 5 gallon (18.9 L) bucket, 2 packets of Kay 5 sanitizer, and clean, empty concentrate  
container.  
1. Remove all concentrate from the dispenser and store in a separate refrigerated compartment.  
2. Fill clean empty concentrate container(s) with approximately 32 oz. (946 ml) of hot tap water (approximately  
140 Deg. F (60 Deg. C). Load the containers of hot water into the dispenser (just like concentrate).  
3. Place an empty container under the dispense nozzles.  
4. Press and hold the dispense button at each station until the stream out of the nozzles runs clear (about 30  
seconds). Note: the dispenser will not allow all stations to run at the same time.  
5. Once this is completed, remove the container(s) and empty.  
6. Remove each dispense nozzle and mixing element and run under hot tap water to remove excess pulp.  
7. Prepare 2.5 gal. (9.46 L) of sanitizing solution by dissolving 1 packet of Kay 5 sanitizer into 2.5 gal. (9.46 L)  
of 120 Deg F (48.9 Deg. C) water to ensure 100 ppm of available chlorine.  
8. Place nozzle(s) and mixing element(s) in a separate 1-quart container of sanitizing solutions and mix thor-  
oughly. Allow the parts to soak for 2 minutes.  
9. Clean the dispense nozzle receptacle(s) (dispense valves) with the sanitizing solution and a soft bristle  
brush.  
10. Clean the concentrate bottle’s inlet adapter(s) using the sanitizing solution and a soft bristle brush.  
11. Replace the mixing element(s) and nozzle(s).  
12. Fill approximately 128 ounces (3.8 L) of clean sanitizing solution into clean, empty concentrate container(s).  
Do not use the sanitizing solution used in step 10. Load the container(s) into the dispenser.  
13. Place the empty 5 gallon bucket under the dispense nozzles.  
14. For the JDF-2S, press and hold both dispense buttons for about 10 seconds to initiate the sanitize cycle.  
For the JDF-4S, press and hold three left most dispense buttons (Stations 1, 2 and 3) for about 10 seconds  
to initiate the sanitize cycle. The cycle will start with only one of the dispense stations dispensing. Note: The  
cycle will consist of a 1 minute dispense time (alternating) on each station, then 5 minutes of soak time, then  
a 2 minute dispense time (alternating) on each station.  
15. When the above cycle is complete, Remove the sanitizing solution and replace with concentrate.  
16. At each station, press and hold the dispense switch until product appears. Then dispense one 12 ounce  
(354.9 ml) glass of finished product and discard.  
17. Wipe internal and external surfaces with a clean, damp cloth.  
39992 042007  
12  
CLEANING (cont)  
Monthly: Clean Condenser Coils  
1. Use a soft bristle brush to clean the build up of dirt in the condenser.  
NOTE: Some models include a removable filter that can be cleaned in warm soapy water.  
Annually: Replace Pump Tubing  
39690.0000  
39688.0000  
Tube Kit JDF-2S & JDF-4S  
Tube Assembly  
1. Open dispenser door.  
2. Remove all product containers and place them in a refrigerated (35-40 degrees F [1.6-4.4 degrees C]) envi-  
ronment. Disconnect all connections to ambient products from the bottle adapter.  
3. Rinse all dispense stations using steps outlined in “DAILY RINSE PROCEDURE”.  
4. Disconnect dispenser from power source.  
5. Remove the dispense platform cover.  
6. Disconnect the dispense platform water line(s) from the supply line inside the refrigerated cabinet and dis-  
connect the wiring connection(s) from the cabinet receptacle(s).  
7. Remove the mounting screw(s) securing the dispense platform(s) to the cabinet .  
8. Pull the dispense platform(s) completely out of the cabinet and place it on a flat work surface.  
9. Close the dispenser door.  
10. Remove the 4 screws securing the pump head.  
11. Gently pull the pump head apart.  
12. Gently pull the pump tube from around the pump’s rotor.  
13. Release the clamps securing the old pump tubing to the plastic elbows.  
14. Pull the plastic elbows from the old pump tubing, and discard the old pump tubing.  
15. Insert the plastic elbows into the new pump tubing and secure it with the clamps.  
16. Gently wrap the new pump tubing around the pump’s rotor.  
17. Reassemble the pump housing onto the platform assembly.  
18. Repeat steps 10 through 17 for the remaining pump(s).  
19. Replace the dispense platform(s) into the refrigerated cabinet, making sure to reconnect all electrical and  
water connections.  
20. Replace the dispense platform cover.  
21. Turn power on to dispenser.  
22 Install containers of rinse water, run each station and check for leaks. Repair leaks as necessary.  
23. Replace product shelf and product containers. Reconnect any connections to ambient product containers.  
24. Prime the pumps as described in “PRIMING” in the Initial Fill Section.  
39992 042007  
13  
ADJUSTMENT & OPTIONAL SETTINGS  
Water Flow Testing and Adjustment  
1. Place a graduated measuring cup or the large chamber of the empty  
brixing cup (BUNN-O-MATIC part number 33095.0000) under the ap-  
propriate dispense nozzle. Place the Dispense Lockout switch in the  
OFF position.  
2. Press and release the desired “Product Dispense Switch” three  
times.  
3. The selected position will dispense water (no concentrate) only for 3  
seconds.  
4. Measure the water dispensed.  
P3586  
FIG 14 Adjusting Water Flow  
Using 1/4" allen wrench  
5. Adjust the water flow rate Fig 14, (clockwise to increase flow rate;  
counterclockwise to decrease flow rate) to the corresponding product  
mix ratio as follows:  
Mix Ratio  
(water + concentrate)  
2+1  
Adjust water flow rate to:  
Product  
Brix %  
*3.75 fl. oz (111 ml)  
per 3-second test  
Prune Juice  
Other  
16.0%  
*
Orange Juice  
Pineapple Juice  
Cranberry Fruit Cocktail  
Grapefruit Juice  
Lemonade  
11.8%  
12.8%  
14.0%  
10.6%  
4+1  
5+1  
*4.0 fl. oz (118 ml)  
per 3-second test  
Apple Juice  
Fruit Punch  
Grape Juice  
Other  
12.0%  
13.0%  
3+1 through 7+1  
Above 7+1  
*
*
*4.0 fl. oz (118 ml)  
per 3-second test  
Other  
High Viscosity Juice  
2.25 - 3.0 fl. oz (66.5 - 89 ml)  
per 3-second test  
As Required  
-
*Maximum flow rate may be less depending on the water pressure supply at each location.  
Note: Information for specific products listed in this table is to be used for reference only. Consult the product  
label for exact mix ratio and/or brix %. See product label for target brix %.  
6. Repeat steps 1 through 5 as necessary until the correct water flow rate is achieved.  
7. Repeat steps 1 through 5 for the remaining dispense positions.  
8. Place the Dispense Lockout switch back into the ON position.  
Pump Speed Adjustment  
1. Disconnect the dispenser from the power source.  
2. Remove the drip tray.  
3. Remove the two screws securing the splash panel and remove the splash panel  
4. Locate the adjustment knobs on the circuit board.  
5. Turn the adjustment knobs clockwise to increase speed and counterclockwise to decrease speed.  
6. The knob positions directly correspond to dispense station locations.  
7. Reinstall the splash panel and drip tray and reconnect the dispenser to the power source.  
39992 042007  
14  
ADJUSTMENT & OPTIONAL SETTINGS (cont)  
Total Dispense Ratio Set Up Procedure  
1. Adjust water flow as described in Water Flow Testing and Adjustment. Record water output setting for later  
reference on each dispense head.  
2. Place the Dispense Lockout switch in the OFF position.  
3. Place a measuring container under the dispense nozzle, press and release the DISPENSE button 6 times.  
4. Record the total ounces dispensed.  
5. Refer to the Brix/Ratio chart below to confirm proper total dispensed amount for ratio desired and water  
output previously recorded.  
6. To increase or decrease the product output, refer to Pump Speed Adjustment section.  
7. Place the Dispense Lockout switch back into the ON position.  
ꢃ SECOND  
WATER DISPENSE  
ꢌOZ  
2ATIO 4ARGET  
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ꢄꢋꢂꢃ ꢃꢋꢆꢇ ꢃꢋꢄꢄ ꢃꢋꢃꢊ ꢃꢋꢀꢂ ꢃꢋꢂꢄ ꢃꢋꢊꢉ ꢃꢋꢊꢆ ꢃꢋꢊꢃ ꢃꢋꢊꢊ ꢀꢋꢉꢈ ꢀꢋꢉꢆ ꢀꢋꢉꢅ ꢀꢋꢉꢃ  
ꢄꢋꢅꢊ ꢄꢋꢊꢊ ꢃꢋꢇꢅ ꢃꢋꢆꢊ ꢃꢋꢅꢊ ꢃꢋꢄꢃ ꢃꢋꢃꢈ ꢃꢋꢃꢃ ꢃꢋꢃꢊ ꢃꢋꢀꢇ ꢃꢋꢀꢅ ꢃꢋꢀꢃ ꢃꢋꢀꢂ ꢃꢋꢀꢊ  
ꢄꢋꢈꢈ ꢄꢋꢃꢃ ꢄꢋꢊꢆ ꢃꢋꢉꢊ ꢃꢋꢇꢉ ꢃꢋꢇꢂ ꢃꢋꢆꢆ ꢃꢋꢆꢂ ꢃꢋꢅꢈ ꢃꢋꢅꢅ ꢃꢋꢅꢀ ꢃꢋꢅꢊ ꢃꢋꢄꢈ ꢃꢋꢄꢇ  
ꢅꢋꢀꢅ ꢄꢋꢆꢇ ꢄꢋꢃꢈ ꢄꢋꢀꢊ ꢄꢋꢊꢈ ꢄꢋꢊꢊ ꢃꢋꢉꢄ ꢃꢋꢈꢉ ꢃꢋꢈꢅ ꢃꢋꢈꢀ ꢃꢋꢇꢉ ꢃꢋꢇꢇ ꢃꢋꢇꢅ ꢃꢋꢇꢃ  
ꢅꢋꢆꢃ ꢅꢋꢊꢊ ꢄꢋꢆꢉ ꢄꢋꢅꢊ ꢄꢋꢃꢈ ꢄꢋꢀꢉ ꢄꢋꢀꢀ ꢄꢋꢂꢇ ꢄꢋꢂꢃ ꢄꢋꢊꢉ ꢄꢋꢊꢆ ꢄꢋꢊꢄ ꢄꢋꢊꢀ ꢄꢋꢊꢊ  
ꢆꢋꢊꢊ ꢅꢋꢃꢃ ꢅꢋꢊꢊ ꢄꢋꢈꢊ ꢄꢋꢆꢇ ꢄꢋꢅꢇ ꢄꢋꢅꢊ ꢄꢋꢄꢄ ꢄꢋꢄꢊ ꢄꢋꢃꢆ ꢄꢋꢃꢃ ꢄꢋꢃꢂ ꢄꢋꢀꢉ ꢄꢋꢀꢇ  
ꢆꢋꢃꢈ ꢅꢋꢆꢇ ꢅꢋꢃꢂ ꢅꢋꢂꢊ ꢄꢋꢉꢆ ꢄꢋꢈꢆ ꢄꢋꢇꢈ ꢄꢋꢇꢀ ꢄꢋꢆꢈ ꢄꢋꢆꢄ ꢄꢋꢆꢊ ꢄꢋꢅꢈ ꢄꢋꢅꢅ ꢄꢋꢅꢃ  
ꢆꢋꢇꢅ ꢆꢋꢊꢊ ꢅꢋꢆꢃ ꢅꢋꢄꢊ ꢅꢋꢀꢅ ꢅꢋꢂꢄ ꢅꢋꢊꢆ ꢅꢋꢊꢊ ꢄꢋꢉꢅ ꢄꢋꢉꢂ ꢄꢋꢈꢈ ꢄꢋꢈꢅ ꢄꢋꢈꢀ ꢄꢋꢈꢊ  
ꢇꢋꢂꢃ ꢆꢋꢃꢃ ꢅꢋꢉꢄ ꢅꢋꢇꢊ ꢅꢋꢅꢄ ꢅꢋꢄꢃ ꢅꢋꢃꢄ ꢅꢋꢀꢈ ꢅꢋꢀꢃ ꢅꢋꢂꢈ ꢅꢋꢂꢅ ꢅꢋꢂꢀ ꢅꢋꢊꢉ ꢅꢋꢊꢇ  
ꢇꢋꢅ ꢆꢋꢆꢇ ꢆꢋꢀꢅ ꢆꢋꢊꢊ ꢅꢋꢈꢃ ꢅꢋꢇꢂ ꢅꢋꢆꢃ ꢅꢋꢅꢆ ꢅꢋꢅꢊ ꢅꢋꢄꢅ ꢅꢋꢄꢀ ꢅꢋꢃꢈ ꢅꢋꢃꢆ ꢅꢋꢃꢃ  
$ISPENSED PRODUCT ꢌOZ  
Temperature Compensated Refractometer Method  
1. Adjust the water flow as described in Water Flow Testing and Adjustment.  
2. Place an empty container under the appropriate dispense nozzle.  
3. Press and hold the “Product Dispense Switch” Figs 9 & 10, until water and concentrate begin flowing freely  
from the dispense nozzle.  
4. Discard the product caught previously and place the empty container back under the dispense nozzle.  
5. Press and hold the “Product Dispense Switch” until the cup is filled.  
6. Stir the contents of the cup, and use the refractometer (according to the manufacturer’s instructions) to check  
the brix %.  
7. Adjust the pump speed (down to decrease the brix %; up to increase the brix %) to achieve the correct brix  
% as described in Pump Speed Adjustment.  
39992 042007  
15  
ADJUSTMENT & OPTIONAL SETTINGS (cont)  
Dispenser Lockout  
Dispense functions of the dispenser can be turned-off to prevent unauthorized use of the dispenser, while keeping  
the refrigeration system running.  
1. Locate the Dispense Lockout switch at the bottom front of the dispenser behind the drip tray.  
2. Place the switch in the OFF position to prevent dispensing.  
3. Place the switch in the ON position to allow dispensing.  
39992 042007  
16  
FUNCTION LIST  
Circuit Board LED Indicators - JDF-2S  
LED #  
1
LED Color  
Green  
Illuminates:  
When the compressor should be ON.  
When the cabinet temperature is above 50 degrees F.  
2 Cabinet  
Red  
Flashes slowly when cabinet temperature exceeds 50 degrees F for 4  
hours. Dispense functions are locked out under this condition. Power  
down the dispenser to reset.  
Flashes rapidly if dispense is attempted in lockout condition.  
Open cabinet thermistor circuit will flash #2 and #3 LED’s 1 time every 3  
seconds.  
Shorted cabinet thermistor will turn #2 and #3 LED’s on steady.  
When cabinet temperature is below 50 degrees F.  
3 Cabinet  
4 Bath  
Green  
Red  
When bath temperature is above 34 degrees F.  
Flashes slowly when compressor is in a 6 minute delay period.  
Open bath thermistor circuit will flash #4 and #5 LED’s 1 time every 3  
seconds. The compressor will not run under this condition.  
Shorted bath thermistor circuit will flash #4 and #5 LED’s 2 times every 3  
seconds. The compressor will not run under this condition.  
5 Bath  
Green  
When bath temperature is below 34 degrees F.  
1
2
4
3
5
P3585  
FIG 15 JDF-2S  
39992 042007  
17  
FUNCTION LIST (Continued)  
Circuit Board LED Indicators - JDF-4S  
LED #  
LED Color  
Illuminates:  
1 Bath  
Red  
When bath temperature is above 34 degrees F.  
Flashes slowly when compressor is in a 6 minute delay period.  
Open bath thermistor circuit will flash #4 and #5 LED’s 1 time every 3  
seconds. The compressor will not run under this condition.  
Shorted bath thermistor circuit will flash #4 and #5 LED’s 2 times every 3  
seconds. The compressor will not run under this condition.  
2 Bath  
3
Green  
Green  
Red  
When bath temperature is below 34 degrees F.  
When the compressor should be ON.  
4 Cabinet  
When the cabinet temperature is above 50 degrees F.  
Flashes slowly when cabinet temperature exceeds 50 degrees F for 4  
hours. Dispense functions are locked out under this condition. Power  
down the dispenser to reset.  
Flashes rapidly if dispense is attempted in lockout condition.  
Open cabinet thermistor circuit will flash #2 and #3 LED’s 1 time every 3  
seconds.  
Shorted cabinet thermistor will turn #2 and #3 LED’s on steady.  
When cabinet temperature is below 50 degrees F.  
5 Cabinet  
Green  
4
5
1
2
3
P3845  
FIG 16 JDF-4S  
39992 042007  
18  
TROUBLESHOOTING  
A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems  
encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic  
Technical Service Department.  
Inspection, testing, and repair of electrical equipment should be performed only by qualified service person-  
nel.  
All electronic components have 120-240 volt ac and low voltage dc potential on their terminals. Shorting of  
terminals or the application of external voltages may result in board failure.  
Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If  
an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a  
terminal or crimp.  
Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are  
energized for more than ten minutes without a supply of water.  
The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will  
help to avoid twists and kinks in the tubing.  
Make certain that all plumbing connections are sealed and electrical connections tight and isolated.  
WARNING – • Exercise extreme caution when servicing electrical equipment.  
• Unplug the dispenser when servicing, except when electrical tests are specified.  
• Follow recommended service procedures.  
• Replace all protective shields or safety notices.  
PROBLEM  
REMEDY  
PROBABLE CAUSE  
Cold Water Circulation  
1. Cabinet cooling fan.  
Replace fan (24vdc).  
Dispense stations not working.  
Note: Cooling failure or excessive  
cabinet temperatures for more  
than 4 hours will result in dispense  
lockout or no dispense.  
Note: Reset fault/timer by unplug-  
ging unit.  
Note: Fan receives power when the  
dispenser is powered.  
2. Bath recirculation pump.  
A) If not running, check refrigera-  
tion switch and wiring for proper  
continuity.  
B) Check for 120V or 230V AC at  
pump. Replace pump.  
3. Restricted water flow to cabinet Check for kinked hose.  
water coil and bath.  
39992 042007  
19  
TROUBLESHOOTING (cont.)  
PROBLEM  
REMEDY  
PROBABLE CAUSE  
Refrigeration  
Dispense stations not working.  
Note: Cooling failure or excessive  
1. Compressor ON/OFF switch.  
Check for "ON" position or no con-  
tinuity - replace switch.  
bath and cabinet temperatures for 2. Dirty condenser filter or fins.  
more than 4 hours will result in  
dispense lockout or no dispense.  
Clean filter and fins or replace con-  
denser filter. (Filter not supplied on  
some machines).  
3. Condenser fan not running.  
A) Check for 120V or 230V AC. Re-  
place fan motor or check fan blades  
for obstructions.  
B)CheckcompressorLEDoncircuit  
board. If ON, relay coil should have  
power (120 or 230 VAC).  
4. Compressor relay not activat- Checkcompressorrelaycoilfor120  
ing.  
or 230vac.  
NOTE: Always check power with  
coil attached. If compressor LED  
is ON and no 120 or 230vac - re-  
place board. If yes, 120 or 230vac  
- replace relay.  
Note: Relay contacts are normally  
open.  
5. Compressor not running.  
Checkcompressorthermaloverload  
(N/C). If open check for dirty con-  
denser filter or adequate ventilation  
and space around machine.  
6. Compressor running and not Checkrefrigerationsystemforleaks  
cooling. and proper charge.  
Dispenser Locked Out  
Dispense stations not working.  
1. Check Dispense Lockout switch. (A) Set switch to ON position.  
(B) Check switch and harness for  
proper continuity.  
Cooling system failure.  
1. Refrigeration or cold water recir- Check all previous items that pre-  
culation system.  
tain to refrigeration or cold water  
recirculation  
39992 042007  
20  
TROUBLESHOOTING (cont.)  
PROBLEM  
REMEDY  
PROBABLE CAUSE  
Dispense station not working  
1. Dispense Lockout switch set to  
OFF position.  
Place switch in ON position.  
2. Dispense switch failed  
Checkswitchandharnessforproper  
continuity.  
All stations dispense concentrate Main water supply  
only  
Check for ON position.  
Frozen bath  
A) Compressor relay/contacts  
shorted - replace relay.  
B) Recirculating pump - replace or  
check for kinked flex line.  
Inlet water valve failed  
A) Check for 120V or 230V power  
when dispensing. If yes, replace  
valve. If no, check harness for  
proper continuity. Then replace  
circuit board if needed.  
39992 042007  
21  
TROUBLESHOOTING (cont.)  
PROBLEM  
REMEDY  
PROBABLE CAUSE  
Dispense station  
concentrate only  
Water solenoid  
Replace solenoid (24vdc) or check  
wire connection between water  
valve and main control board.  
Dispense station  
water only  
Concentrate out  
Replacerefillconcentratecontainer  
or BIB  
Product pump not pumping  
Check for proper counterclockwise  
rotation of pump rollers. If coun-  
terclockwise, replace pump tubing.  
If clockwise, wire connection to  
pump is reversed. Switch wires on  
terminals.  
Pump not turning  
A) Check speed setting on circuit  
board and increase speed (turn  
clockwise)  
B) Check for d.c. power to pump  
motor. If yes, replace motor assy. If  
no, check harness for proper con-  
tinuity. Then replace circuit board  
if needed.  
39992 042007  
22  
TROUBLESHOOTING (cont.)  
PROBLEM  
REMEDY  
PROBABLE CAUSE  
Waterleakllingdriptrayoraround 1. Initial fill/setup  
dispense deck area  
Some expansion normal. May fill  
drip tray during initial ice block  
formation  
2. Dispense deck  
Inspect or replace fittings clamps,  
o-rings,solenoidsandquickdiscon-  
nect fittings.  
NOTE: Dispense deck area slopes  
to drain tube that leads to the drip  
tray.  
3. Water pressure greater than  
100psi  
Installwaterpressureregulatorand  
reduce to 50 psi.  
Water leaking beneath machine  
1. Bath tank overflow.  
A) Check all internal water connec-  
tions.  
B) Check internal plumbing con-  
nections.  
2. Condensation from cabinet cool- Check for routing of condensation  
ing coil. tube to water bath.  
Erratic spray during dispense  
Dispense nozzle dripping water  
Dispense nozzle mixer missing or Replace mixer.  
broken  
Dispense solenoid.  
Replace dispense deck solenoid.  
39992 042007  
23  
TROUBLESHOOTING (cont.)  
PROBLEM  
REMEDY  
PROBABLE CAUSE  
Unit is not working  
1. Step-down transformer.  
Checkfor120/24or230/24vac.Ifno  
24vac reading, replace step-down  
transformer.  
2. Main control board.  
If 24 vac present and no LED’s lit,  
replace control board..  
Difficulty brixing and/or weak bev- 1. Product viscosity or too cold.  
erage  
Thorough thaw of product before  
use (35° - 40°)  
2. Low water pressure.  
Maintain 20 psi or higher and a  
minimum flow rate of 3 fl oz/sec.  
3. High water pressure.  
Over 100 psi, install a pressure  
regulator and set to 50 psi.  
4. Dispense valve adjustment set- A)Perform3secondwaterdispense  
ting.  
test. Factory setting is 1.0 oz/sec.  
Acceptable water flow rate is .-0.8  
to 1.5 oz/sec depending on the mix  
ratio (4+1).  
B) Adjust water to proper mix ratio.  
Once water is set, adjust motor  
speed to achieve brix %.  
5. Brix ratio.  
Checkforproperbrixratioperprod-  
uct using Total Dispense method  
and or refractometer method.  
Difficulty brixing and/or weak bev- 1. Pump tubing.  
erage  
Inspect, clean, or replace tubing  
and pump rotor/rollers for ease of  
rotation.  
2. Use of portable water pump.  
A) Follow plumbing requirements  
for pressure and flow rate.  
B) Source another portable pump  
or water supply that meets require-  
ments.  
Difficulty brixing bag-in-box  
Vacuum leak  
Inspect all lines and connections  
frombag-in-boxconnectortobottle  
adapter assembly.  
39992 042007  
24  
COOLANT SCHEMATIC DIAGRAM  
39992 042007  
25  
120V  
MODELS  
230V  
MODELS  
SCHEMATIC WIRING DIAGRAM JDF-2S  
L1  
N
GND L1 N  
EMI  
FILTER  
A
A
B
B
A
A
B
B
GRN  
TRANSFORMER  
BLU  
L
O
A
D
L
I
N
E
BLK  
WHI  
WHI/BLU  
COMPRESSOR ASSEMBLY  
K2  
LIMIT  
THERMOSTAT  
WHI/BLK  
WHI  
K1  
BLU/BLK  
K2  
COMP.  
GRN  
CONDENSOR FAN  
WHI  
BLU/BLK  
MOTOR  
REFRIGERATION  
SWITCH  
BLU/BLK  
RED/BLK  
RED/BLK  
BLK  
K1  
WATER INLET  
VALVE  
WHI  
RED/BLK  
RECIR.  
PUMP  
BRN  
WHI  
LEFT  
DISPENSE  
RIGHT  
DISPENSE  
SOL  
GRN  
RED  
VIO  
RED  
ORN  
PUMP  
PUMP  
1
WHI/VIO  
WHI/VIO  
RED  
ORN  
VIO  
J2-1  
RED  
WHI/RED  
RED  
BLK  
J3-1  
J3-2  
FAN  
VIO  
WHI/ORN  
YEL  
VIO  
WHI/ORN  
YEL  
YEL  
WHI/ORN  
WHI/VIO  
LEFT  
DISPENSE  
RIGHT  
DISPENSE  
J2-6  
GRY  
WHI/BLK  
J7-1  
J7-2  
RED  
ORN  
RED  
ORN  
WHI/VIO  
WHI/ORN  
YEL  
YEL  
C
O
N
T
R
O
L
SOL  
SOL  
1
12  
BLK  
WHI  
J9-1  
J9-2  
P
C
B
O
A
R
D
t
CABINET  
THERMISTOR  
RIGHT  
DISPENSE  
SWITCH  
t
WATER BATH  
THERMISTOR  
BLK  
RED  
GRN  
1
GRN  
RED  
BLK  
BLK  
WHI/BLU  
BLU  
J5-1  
J5-4  
LEFT  
DISPENSE  
SWITCH  
J6-1  
J6-3  
BLK  
120 VOLTS AC  
or  
230 VOLTS AC  
2 WIRE  
SINGLE PHASE  
DISPENSE  
LOCKOUT  
SWITCH  
BLK  
BLK  
39992 042007  
26  
SCHEMATIC WIRING DIAGRAM JDF-4S  
120V  
MODELS  
230V  
MODELS  
L1  
N
GRN  
GND L1  
N
EMI  
FILTER  
A
A
B
B
A
A
B
B
TRANSFORMER  
BLK  
BLU  
L
O
A
D
L
I
N
E
WHI  
WHI/BLU  
TRANSFORMER  
BLU  
L
O
A
D
L
I
N
E
BLK  
WHI/BLU  
WHI  
COMPRESSOR ASSEMBLY  
K2  
COLD WATER  
VALVE  
LIMIT  
THERMOSTAT  
WHI  
WHI/BLK  
K1  
BLU/BLK  
K2  
COMP.  
WHI/VIO  
WHI  
SOL  
GRN  
CONDENSOR FAN  
WHI  
BLU/BLK  
MOTOR  
REFRIGERATION  
SWITCH  
BLU/BLK  
RED/BLK  
RED/BLK  
BLK  
K1  
WATER INLET  
VALVE  
WHI  
RED/BLK  
RECIR.  
PUMP  
BRN  
WHI  
STATION 1  
DISPENSE  
STATION 2  
DISPENSE  
SOL  
GRN  
RED  
VIO  
RED  
ORN  
PUMP  
PUMP  
1
WHI/VIO  
WHI/VIO  
RED  
WHI/RED  
RED  
BLK  
J3-1  
J3-2  
FAN  
RED  
ORN  
VIO  
YEL  
WHI/ORN  
WHI/VIO  
J2-1  
GRY  
WHI/BLK  
J7-1  
J7-2  
VIO  
WHI/ORN  
YEL  
VIO  
WHI/ORN  
YEL  
1
STATION 1  
DISPENSE  
STATION 2  
DISPENSE  
J2-6  
BLK  
WHI  
RED  
ORN  
RED  
ORN  
J9-1  
J9-2  
WHI/VIO  
WHI/ORN  
YEL  
YEL  
C
O
N
T
SOL  
SOL  
t
12  
1
COLD WATER  
DISPENSE  
SWITCH  
CABINET  
THERMISTOR  
R
O
L
STATION 3  
DISPENSE  
STATION 4  
DISPENSE  
RED  
VIO  
RED  
ORN  
BLU  
BLK  
P
C
B
O
A
R
D
PUMP  
PUMP  
WHI/VIO  
TAN  
t
STATION 4  
DISPENSE  
SWITCH  
WATER BATH  
THERMISTOR  
WHI/GRN  
GRN  
J13-1  
J13-6  
8
BLK  
BLK  
BLK  
BLK  
ORN  
YEL  
PNK  
VIO  
WHI/ORN  
YEL  
PNK  
BLU  
GRY  
YEL  
ORN  
BLU  
GRY  
BLU  
TAN  
J15-1  
STATION 3  
DISPENSE  
SWITCH  
STATION 3  
DISPENSE  
STATION 4  
DISPENSE  
J15-4  
RED  
ORN  
WHI/GRN  
GRN  
WHI/VIO  
WHI/ORN  
YEL  
YEL  
GRN  
RED  
BLK  
BLK  
SOL  
SOL  
J5-1  
12  
1
STATION 2  
DISPENSE  
SWITCH  
J5-4  
WHI/BLU  
BLU  
J6-1  
RED  
GRN  
J6-3  
STATION 1  
DISPENSE  
SWITCH  
WHI/BLU  
BLU  
J12-1  
J12-3  
BLK  
120 VOLTS AC  
or  
230 VOLTS AC  
2 WIRE  
BLK  
DISPENSE  
LOCKOUT  
SWITCH  
SINGLE PHASE  
39992 042007  
27  
QUICK SETUP GUIDE - JDF-2S and JDF-4S (JDF-2S shown)  
P3577  
1. Install door cover by first plugging the  
door harness connector into the machine  
harness connector located at the bottom  
P3578  
2. Install door cover.  
of the machine door.  
3. Secure the door cover using 5 scPr3e5w79s  
provided.  
P3587-1  
P3580-1  
P3588  
4. Place refrigeration switch in the OFF po-  
sition.  
5. Connect water supply to machine. (See 6. Connect power supply to machine. (See  
Plumbing Requirements)  
Electrical Requirements)  
P3589  
P3582  
8. Place the Dispense Lockout Ps3w612itch  
in the OFF position.  
7. Install bath tank fill tube over a nozzle as  
9. Hold the dispense switch until water be-  
gins to flow into the tank (approx. 10 sec-  
onds). When tank is full, water will begin  
pour out of the overflow tube, Press the  
dispense button to stop the flow of water.  
shown.(See Initial Fill)  
12. Proceed to page 7 in the Operating and  
Installation manual for calibration instruc-  
tions and charts.  
P3590-1  
11. Insert juice containers as shown.P3591  
10. Place the refrigeration switch in the ON  
position.  
39992 042007  
28  

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