Bunn JDF-4S, JDF-4D, JDF-4SB User Manual
JDF-2S, JDF-4S
JDF-4D, JDF-4SB
SERVICE & REPAIR MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts
Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at
www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and
manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
49179.0000C 02/14 ©2013 Bunn-O-Matic Corporation
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:
1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCP/MCA pod brewers thermal servers
and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor.
2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below:
a) Electronic circuit and/or control boards - parts and labor for 3 years.
b) Compressors on refrigeration equipment - 5 years parts and 1 year labor.
c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts
and labor for 4 years or 40,000 pounds of coffee, whichever comes first.
These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be
commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the
applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured
by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation,
improper maintenance or repair, non periodic cleaning and descaling, equipment failures related to poor water quality,
damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but
not limited to user replaceable parts such as seals and gaskets. This warranty is conditioned on the Buyer 1) giving BUNN
prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office
Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an
authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under
warranty.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are not authorized to make
modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such
individuals, whether oral or written, do not constitute warranties and should not be relied upon.
If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the
applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair
is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for
the equipment.
THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS
EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION
AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.
In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of
use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities
or services, or any other special, incidental or consequential damages.
392, A Partner You Can Count On, Air Infusion, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, BrewWISE, BrewWIZARD, BUNN Espress, BUNN Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with
the stylized red line, BUNNlink, Bunn-OMatic, Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design,
Cool Froth, DBC, Dr. Brew stylized Dr. design, Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet
Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment
Worldwide, Respect Earth, Respect Earth with the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com,
Scale-Pro, Silver Series, Single, Smart Funnel, Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality
in Beverage Equipment Worldwide, ThermoFresh, Titan, trifecta, Velocity Brew, Air Brew, Beverage Bar Creator, Beverage
Profit Calculator, Brew better, not bitter., BUNNSource, Coffee At Its Best, Cyclonic Heating System, Daypart, Digital Brewer Control, Element, Milk Texturing Fusion, Nothing Brews Like a BUNN, Pouring Profits, Signature Series, Sure Tamp, Tea
At Its Best, The Horizontal Red Line, Ultra are either trademarks or registered trademarks of Bunn-O-Matic Corporation.
The commercial trifecta® brewer housing configuration is a trademark of Bunn-O-Matic Corporation.
2
49179 070913
INTRODUCTION
Safety first!
To avoid electrical shock, unplug dispenser from power source before servicing inside.
Basic Maintenance
In order to maintain proper machine operation, a Preventative Maintenance schedule must be performed on a
regular basis.
The following procedures pretain to all versions in the JDF family of machines unless otherwise noted.
CONTENTS
Warranty ...................................................................................................................................2
User Notices .............................................................................................................................3
Site Preparation .......................................................................................................................3
Preventive Maintenance
Recommended Daily Cleaning ...........................................................................................4
Preventive Maintenance Schedule ....................................................................................... 5
Troubleshooting ........................................................................................................................ 6
Service .................................................................................................................................... 12
Electrical Schematics ..............................................................................................................50
USER NOTICES
All notices on this equipment are written for your protection. All notices are to be kept in good condition.
Replace any unreadable or damaged labels.
SITE PREPARATION
A minimal clearance is required between the dispenser sides and the wall or another appliances.For optimum
performance, do not allow warm air from surrounding machines blow on the JDF dispenser. Leave some space
so the dispenser can be moved for cleaning.
3
49179 110613
Recommended Daily Cleaning Instructions
The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic
equipment. Do NOT clean this equipment with a water jet device.
1. Open dispenser door. Lift up on
product containers to disconnect them from the machine inlet.
4. Open dispenser door and reconnect all product containers.
2. Close door, place an empty container under the dispense nozzles.
5. Remove dispense nozzles and
drip tray. Wash all parts in warm
soapy water.
3. Dispense from each station until clear water flows from the
dispense nozzle.
6. With a warm/soapy cloth, wipe
down interior of cabinet and
splash panel area behind dispensing nozzles.
7. Replace drip tray and dispense
nozzles.
4
8. Dispense from each station until finished product flows from
the dispense nozzles.
49179 110613
REQUIRED REGULAR MAINTENANCE:
When performing Daily-Weekly Cleaning procedures, inspect o-rings, seals, and bushings for signs of wear or
damage and replace immediately.
Check and/or replace every 6 months or as required:
39690.0000 Pump Tube Replacement Kit (Includes items indented below)
28755.1011 Tube, Norprene .25" ID x 17.0" lg
32732.0000 Clamp .39"/.48"
32656.0000 Fitting, Elbow .25" Barb x .38" Barb
21275.0003 Clamp .57"/.70"
34325.0032 Hose, Flex .38" ID x 5.25" lg
5
49179 110613
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,andrepairofelectricalequipmentshouldbeperformedonlybyqualiedserviceperson-
nel.
• Allelectroniccomponentshavehighvoltageacandlowvoltagedcpotentialontheirterminals.Shortingof
terminals or the application of external voltages may result in board failure.
• Intermittentoperationofelectroniccircuitboards isunlikely.Boardfailurewillnormallybepermanent.If
an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
terminal or crimp.
• Solenoidremovalrequiresinterruptingthewatersupplytothevalve.Damagemayresultifsolenoidsare
energized for more than ten minutes without a supply of water.
• Theuseoftwowrenchesisrecommendedwheneverplumbingttingsaretightenedorloosened.Thiswill
help to avoid twists and kinks in the tubing.
• Makecertainthatallplumbingconnectionsaresealedandelectricalconnectionstightandisolated.
• Thisunitisheatedatalltimes.Keepawayfromcombustibles.
WARNING – • Exerciseextremecautionwhenservicingelectricalequipment.
• Unplugthedispenserwhenservicing,exceptwhenelectricaltestsarespecied.
• Followrecommendedserviceprocedures
• Replaceallprotectiveshieldsorsafetynotices
PROBLEM PROBABLE CAUSE REMEDY
Cold Water Circulation
Dispense stations not working.
Note: Cooling failure or excessive
1. Cabinet cooling fan.
Replace fan (24vdc).
Note: Fan receives power when the
dispenser is powered.
cabinet temperatures for more than 4
hours will result in dispense lockout
or no dispense.
Note: Reset fault/timer by unplug-
2. Bath recirculation pump.
A) If not running, check refrigeration
switch and wiring for proper conti-
nuity.
ging unit.
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.
6
49179 110613
TROUBLESHOOTING (Continued)
PROBLEM
Refrigeration
Dispense stations not working.
Note: Cooling failure or excessive
bath and cabinet temperatures for
more than 4 hours will result in dispense lockout or no dispense.
PROBABLE CAUSE REMEDY
1. Compressor ON/OFF switch.
Check for "ON" position or no continuity - replace switch.
2. Dirty condenser filter or fins.
Clean filter and fins or replace condenser filter. (Filter not supplied on
some machines).
3. Condenser fan not running.
A) Check for 120V or 230V AC. Replace fan motor or check fan blades
for obstructions.
B) Check compressor LED on circuit
board. If ON, relay coil should have
power (120 or 230 VAC).
4. Compressor relay not activating.
Check compressor relay coil for 120
or 230vac.
NOTE: Always check power with
coil attached. If compressor LED is
ON and no 120 or 230vac - replace
board. If yes, 120 or 230vac - replace
relay.
Note: Relay contacts are normally
open.
Dispenser Locked Out
Dispense stations not working.
Cooling system failure.
5. Compressor not running.
6. Compressor running and not
cooling.
1. Check Dispense Lockout switch.
1. Refrigeration or cold water recirculation system.
Check compressor thermal overload
(N/C). If open check for dirty condenser filter or adequate ventilation
and space around machine.
Check refrigeration system for leaks
and proper charge.
(A) Set switch to ON position.
(B) Check switch and harness for
proper continuity.
Check all previous items that pretain
to refrigeration or cold water recirculation
7
49179 110613
TROUBLESHOOTING (Continued)
PROBLEM
Dispense station not working
All stations dispense concentrate
only
PROBABLE CAUSE REMEDY
1. Dispense Lockout switch set to
Place switch in ON position.
OFF position.
2. Dispense switch failed
Check switch and harness for proper
continuity.
Main water supply
Frozen bath
Check for ON position.
A) Compressor relay/contacts short-
ed - 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.
8
49179 110613
TROUBLESHOOTING (Continued)
PROBLEM
Dispense station
concentrate only
Dispense station
water only
PROBABLE CAUSE REMEDY
Water solenoid
Replace solenoid (24vdc) or check
wire connection between water valve
and main control board.
Concentrate out
Replace refill concentrate container
or BIB
Product pump not pumping
Check for proper counterclockwise
rotation of pump rollers. If counterclockwise, 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 continuity. Then replace circuit board if
needed.
9
49179 110613
TROUBLESHOOTING (Continued)
PROBLEM
Water leak filling drip tray or around
dispense deck area
Water leaking beneath machine
PROBABLE CAUSE REMEDY
1. Initial fill/setup
Some expansion normal. May fill
drip tray during initial ice block
formation
2. Dispense deck
Inspect or replace fittings clamps,
o-rings, solenoids and quick discon-
nect fittings.
NOTE: Dispense deck area slopes
to drain tube that leads to the drip
tray.
3. Water pressure greater than
100psi
1. Bath tank overflow.
Install water pressure regulator and
reduce to 50 psi.
A) Check all internal water connec-
tions.
B) Check internal plumbing connec-
tions.
Erratic spray during dispense
Dispense nozzle dripping water
2. Condensation from cabinet cooling coil.
Dispense nozzle mixer missing or
broken
Dispense solenoid.
Check for routing of condensation
tube to water bath.
Replace mixer.
Replace dispense deck solenoid.
10
49179 110613
TROUBLESHOOTING (Continued)
PROBLEM
Unit is not working
Difficulty brixing and/or weak beverage
PROBABLE CAUSE REMEDY
1. Step-down transformer.
Check for 120/24 or 230/24 vac. If
no 24vac reading, replace step-down
transformer.
2. Main control board.
If 24 vac present and no LED’s lit,
replace control board..
1. Product viscosity or too cold.
Thorough thaw of product before use
(35° - 40°)
2. Low water pressure.
Maintain 20 psi or higher and a minimum flow rate of 1 fl oz/sec.
3. High water pressure.
Over 100 psi, install a pressure regulator and set to 50 psi.
4. Dispense valve adjustment setting.
A) Perform 3 second water dispense
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).
Difficulty brixing and/or weak beverage
Difficulty brixing bag-in-box
5. Brix ratio.
1. Pump tubing.
2. Use of portable water pump.
Vacuum leak
B) Adjust water to proper mix ratio.
Once water is set, adjust motor speed
to achieve brix %.
Check for proper brix ratio per product using Total Dispense method and
or refractometer method.
Inspect, clean, or replace tubing
and pump rotor/rollers for ease of
rotation.
A) Follow plumbing requirements for
pressure and flow rate.
B) Source another portable pump
or water supply that meets requirements.
Inspect all lines and connections
from bag-in-box connector to bottle
adapter assembly.
11
49179 110613
SERVICE
This section provides procedures for testing and replacing various major components used in this dispenser
should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any
problem.
WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified service
personnel. The dispenser should be disconnected from the power source when servicing, except when electrical
tests are required and the test procedure specifically states to connect the dispenser to the power source.
COMPONENT ACCESS
WARNING - Disconnect the dispenser from the power source before the removal of any panel or the replacement
of any component.
All components are accessible by opening the door, removal of the door panels, dispenser top covers,
hopper(s), hopper support plate, splash guard, splash panel w/drip tray, lower front access panel and rear access cover.
Refer to the contents listing for component location.
INDEX
Access Panels .................................................................................................................................. 13
Dispense Platform Removal ............................................................................................................. 14
Ballast ..............................................................................................................................................15
Cabinet Fan ......................................................................................................................................16
Compressor .....................................................................................................................................17
Compressor Switch ..........................................................................................................................23
Condenser Fan .................................................................................................................................24
Control Board (Main) .......................................................................................................................25
Control Board (Portion Control Models) ..........................................................................................26
Circulation Pump .............................................................................................................................29
Dispense Platform Switch ................................................................................................................ 30
Dispense Pump ................................................................................................................................ 31
Dispense Motor ................................................................................................................................32
Dispense Valve ................................................................................................................................. 33
Dispense Switches ........................................................................................................................... 34
Cold Water Dispense Switch ............................................................................................................35
Dispense Membrane Switches ......................................................................................................... 36
Cold Water Membrane Switch .......................................................................................................... 37
EMI Filter ..........................................................................................................................................38
Lamp ................................................................................................................................................ 39
Lamp Holder ....................................................................................................................................39
LED Lamp ........................................................................................................................................40
Rectifier ...........................................................................................................................................41
Relay ................................................................................................................................................ 42
Resistor ...........................................................................................................................................43
Solenoid (Cold Water) ...................................................................................................................... 44
Solenoid (Inlet) ................................................................................................................................45
Temperature Probe...........................................................................................................................46
Temperature Sensor .........................................................................................................................47
Transformer .....................................................................................................................................48
Transformer-Lited Doors .................................................................................................................. 49
Circuit Board Triac Map ....................................................................................................................50
Schematic Wiring Diagrams .............................................................................................................51
12
49179 012214
SERVICE(CONT.)
ACCESS PANELS
Location:
All access panels are similar through the whole JDF family (JDF-4S shown). Before removing panels, make
sure power is OFF to the machine and water is disconnected accept where indicated in testing procedures. Retain
all screws and other attaching hardware for re-assembly.
JDF-4S shown
FIG. 1 ACCESS PANELS
13
49179 110613
SERVICE(CONT.)
DISPENSE PLATFORM REMOVAL
1. Remove concentrate dispense tips by turning 1/4 turn to the left, then pull straight down.
2. Lift and remove product shelf to access dispense platform(s).
3. Remove front thumb screw holding dispense platform(s).
4. Disconnect 12 pin connector above dispense platform in rear.
5. Disconnect 3/8” water line at quick disconnect.
6. Remove dispense platform(s) by pulling forward.
JDF-2S shown
The JDF-4S uses 2 of the two head dispense platforms.
FIG. 2 DISPENSE PLATFORM REMOVAL
14
49179 110613
SERVICE (CONT.)
Ballast (JDF-2S,4S)
JDF-2S shown
P1684.40
FIG. 3 BALLAST
Location:
The door lamp ballast is located inside the dispenser
door mounted in the center of the door rear cover.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect a black and blue wire from one set of
lamp sockets.
3. Connect an ohmmeter to the end of each wire.
4. Check for continuity between the two wires.
If continuity is present as described, the ballast is
operating properly.
If continuity is not present as described, replace the
ballast.
5. Check for continuity between the other pair of black
and blue wires.
5. Remove the wire to the ballast from the back of
each bracket.
6. To disengage the ballast wire from the bracket, push
a 1/16” allen wrench (or equivalent tool) into the
front hole that lines up with the wire in the back.
Pull the wire out.
7. Repeat for each bracket.
8. White jumper must remain in place on the back of
the light socket.
9. Remove screws from each ballast. Remove the green
ground wire from the ballast bracket by removing
the bracket’s bottom screw.
10. Install the single ballast (wires on the bottom) onto
the ballast bracket using 2 of the screws previously
removed.
11. Attach ballast wires to the back of bulb sockets by
pushing wires into holes in back of socket.
Note: Attach black wires to the top sockets, and blue
wires to the bottom sockets. Reference electrical schematic if needed.
12. Snap all 4 bulb sockets back onto light panel. Reinstall fluorescent bulbs.
13. Attach green ground wire to the bottom hole of the
ballast bracket using 1 screw.
14. Plug in 3-pin connector into the door harness.
15. To replace door cover, re-connect the dispense
switch harness to door harness. Fasten with 5
screws.
16. Reconnect power to the unit. Test operation.
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove door cover by taking out the 5 screws and
unplug the dispense switch harness from the door
harness. Set door cover and screws aside.
3. Disconnect the 3-pin connector from the ballasts
to the door harness.
4. Remove fluorescent bulbs from the brackets. Pull
off the four snap-in light sockets from the light
panel.
15
P1219
FIG. 4 BALLAST TERMINALS
49179 110613
SERVICE (CONT.)
Cabinet Fan (all Models)
FIG. 5 CABINET FAN
JDF-2S shown
P1684.40
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove the four screws attaching the fan and cover
assembly.
3. Gently pull the cover forward and disconnect the
2-pin connector from the main wiring harness.
4. Remove the fan from the cover assembly and discard
the old fan.
5. Install the new fan to the cover assembly using
screws previously removed.
6. Reconnect the fan to the 2-pin connector on the
main wiring harness.
7. Install the fan and cover assembly to the cabinet
using screws previously removed.
8. Reconnect power to the dispenser.
Location:
The cabinet fan is located inside the dispenser cabinet
mounted in the center behind the fan guard cover.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Remove the four screws attaching the fan and cover
assembly.
3. Gently pull the cover forward and disconnect the
2-pin connector from the main wiring harness.
4. Check for continuity between the two wires on the
fan.
If continuity is present as described, the fan is operating properly.
If continuity is not present as described, replace the
fan.
RED
2
1
BLK
P1219
FIG. 6 CABINET FAN TERMINALS
16
49179 110613
SERVICE (CONT.)
LG Compressor (JDF-2S,4S,4D)
JDF-4S shown
P1684.40
FIG. 7 COMPRESSOR
Location:
The compressor is located at the top of the dispenser
frame.
Test Procedures:
Compressor Relay: Refer to FIG. 8
1. Disconnect the dispenser from the power source.
2. Remove compressor terminal cover retainer (1).
3. Connect a voltmeter across the white wire and the
blue/black wire. Connect the dispenser to the power
source.
The indication must be:
(a) 120 volts ac for two wire 120 volt models or
(b) 230 volts ac for two wire 230 volt models.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to the following test procedures.
If voltage is not present as described, refer to the Con-
tactor and check the contactor.
6. Disconnect the white wire from the compressor
relay.
7. Remove relay from the compressor.
8. Check for continuity across the terminal and the
pin socket on the rear of the relay.
If continuity is present as described, the compressor
start relay is operating properly.
If continuity is not present as described, replace relay.
1 2 3
GRN Wire
FIG. 8 COMPRESSOR THERMAL
OVERLOAD PROTECTOR LOCATION
1. Compressor Terminal Cover
2. Compressor Relay
3. Thermal Overload Protector
P4298.20
Compressor:
1. Remove relay and yhermal overload protector.
2. Check for continuity across the bottom pin on the
compressor and the left top pin on the compressor.
If continuity is present as described, the electrical part
of the compressor is operating properly.
If continuity is not present as described, replace the
compressor.
Thermal Overload Protector:
1. Check for continuity across the terminals on the
thermal overload protector (3).
If continuity is present as described, the thermal overload protector is operating properly.
If continuity is not present as described, replace the
thermal overload protector.
17
49179 110613
SERVICE (CONT.)
Compressor (Cont.)
Removal and Replacement:
Compressor Relay: Refer to FIG. 8
1. Remove the terminal cover (1)
2. Disconnect the white wire from the compressor
relay.
3. Pull relay (2) off of the compressor pins and discard.
4. Push new relay onto the compressor pins.
5. Refer to Fig. 9 and reconnect the wires.
6. Reinstall terminal cover (1).
WHI Wire
Compressor Thermal Overload Protector: Refer to
FIG. 8
1. Remove terminal cover (1).
2. Disconnect the BLU/BLK wire of the harness from
the thermal overload protector.
3. Remove relay (2).
4. Remove overload protector (3) and discard overload
protector.
5. Install new overload protector (3) on to the compressor.
6. Install relay (2).
7. Refer to Fig. 10 and reconnect the thermal overload
protector wires.
8. Reinstall terminal cover (1).
Compressor Assy:
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
NOTE: When replacing the compressor it is recommended that the dryer also be replaced.
FIG. 9 RELAY TERMINALS
Plugs into Relay
BLU/BLK Wire
FIG. 10 THERMAL OVERLOAD PROTECTOR
TERMINALS
6. Install new compressor over the four studs in the
dispenser chassis with the fill valve to the right side
of the dispenser.
7. Secure compressor to the dispenser chassis using
four .25-20 keps nuts and washers.
8. Reconnect tubes from the condenser and the accumulator to the compressor.
9. Reinstall transformer.
10. Evacuate the system.
11. Recharge 120V and 230V system with:
1. Disconnect the tubes from the condenser and the
accumulator.
2. Disconnect the compressor wiring harness from
the dispenser main wiring harness.
3. Remove the four .25-20 keps nuts and washers
securing the compressor to the chassis. Set nuts
and washers aside for reassembly.
4. Disconnect and remove the transformer.
5. From the right side of the dispenser lift the compressor assembly over the four studs in the chassis
and remove compressor.
JDF-2S - 9 oz. Type R134A refrigerant.
Design Pressures: High 255 - Low 36 psi
JDF-4S & 4D - 10 oz. Type R134A refrigerant.
Design Pressures: High 335 - Low 88 psi
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
NOTE: Refer to Wiring Diagrams when reconnecting
wires to Compressor, Thermal Overload Protector and
Start Relay.
18
49179 110613
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