ELECTRO FREEZE SLX400E User manual

OPERATOR'S MANUAL
with Replacement Parts List
H.C. Duke & Son, LLC P/N 184584 March, 2017 Printed in USA
SOFT SERVE
TWIST MODEL
SLX400E, SLX500
184584 3/17

All contents © Copyright 2017 H.C. Duke & Son, LLC, 2116 Eighth Avenue, East Moline Illinois 61244
Operator's Manual
for the
Electro Freeze Model
SLX400E and SLX500
Soft Serve Freezers

iv 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
3. Follow Safety Instructions ....
Read and understand all safety messages in this manual.
Read and understand the decal safety messages on your
freezer. Take notice of the location of all decals on the freezer
and keep the safety decals in good condition. Check them
periodically and replace missing, damaged or illegible safety
decals. The safety decals must remain in place and legible
for the life of the freezer. If you need new decals, use the
information and illustrations on pages v and vi of this manual to
identify the decal and call or write to H.C. Duke & Son, LLC. or
local Electro Freeze distributor.
Do not attempt to operate the soft serve freezer until you
read and understand all safety messages and the operating
instructions in this manual.
DANGER
The signal words — DANGER, WARNING and
CAUTION— are used with the safety alert symbol
(DANGER decals on the freezer may or may not have the
safety alert symbol, but the message is the same). Decals
with the words DANGER, WARNING or CAUTION appear
on the freezer. DANGER identies the most serious
hazard. Decals with the words DANGER or WARNING
are typically near specic hazards on the freezer. General
precautions are listed on CAUTION safety decals. In this
manual, CAUTION messages with the safety alert symbol
call attention to safety messages.
1. Recognize Safety Information ....Look for this
safety alert symbol throughout this manual.
When you see this symbol on your freezer or in this manual, be
alert to the potential for personal injury. Follow recommended
precautions and safe operating practices.
2. Understand Signal Words ....
SAFETY FIRST!
Follow these four steps to safety ....
WARNING
CAUTION

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 v
SAFETY FIRST!
Trained person (or Operator): A person who has been trained in the basic operation of
the freezer. This person is knowledgeable in the operation of machine startup, stopping,
lling, and basic cleaning, disassembly, washing, and sanitation of the freezer.
Freezer Technician: A person who has been trained by a factory representative, or
an experienced and qualied service person, to perform more complicated operations
such as freezer installation, maintenance repairs, component replacement , is aware of
hazards associated with electricity, moving parts, and takes necessary steps to protect
against injury to themselves and other people.
4. Definitions ....
5. Operate Safely ....
DO NOT allow untrained personnel to maintain or
service this freezer. Failure to follow this instruction
may result in severe personal injury. DO NOT operate
the freezer until all service and access covers are
secured with screws. DO NOT attempt to repair
the freezer until the main power supply has been
disconnected. Some freezers have more than one
disconnect switch. Contact your IDQ authorized
service representative or H.C. Duke & Son, LLC
Service Department for original equipment parts.
6. Caution ....
• This Freezer is to be operated by trained persons. The Dispense
feature, if used by public in self-serve applications, shall be monitored
by trained persons able to assist people with physical, sensory or mental
impaired capabilities.
• Children should not be allowed to play around this equipment.
• Do not store explosive substances such as aerosol cans with a ammable
propellant in freezer.
• This appliance is not designed for outdoor weather conditions and shall not be
exposed to rain.
• Do not wash machine with power sprayer. Do not install machine next to a power
sprayer where splash of freezer can occur.
• Machine is designed for use in areas of normal atmosphere. It is not to be used in
areas subject to explosion-proof standards.
IMPORTANT: Store Managers,owners, and supervisors must be aware of staff
capabilities and that they do not perform freezer operations outside their level of
knowledge or responsibility.

vi 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
Safety Decal Locations
You may contact your local authorized
Electro Freeze Distributor, as follows:
NAME:________________________
ADDRESS: ____________________
__________________________
PHONE:_______________________
or—for factory service assistance—
contact H. C. Duke & Son, LLC, Electro
Freeze Service Department by phone or
Phone: [phone]
[phone]
FAX: [phone]
E-mail: [email protected]
(The decals on the next page are
numbered 1 and 2. Those numbers
correspond to the numbers in the table
below. The table provides the part
number, description, and quantity for each
decal.)
Do not attempt to operate the freezer
until all safety precautions and operating
instructions in this manual are read and
understood.
Take notice of all warning, caution,
instruction and information decals (or
labels) on the freezer as shown in the
gure to the right. The labels have been
put there to help maintain a safe working
environment.
The labels have been designed to
withstand washing and cleaning. All labels
must remain legible for the life of the
freezer. Check labels periodically to be
sure they can be recognized as warning
labels.
If it is necessary to replace any label,
please contact your local authorized
Electro Freeze Distributor or H. C. Duke
& Son, LLC When ready to order you will
need to determine the (1) part number,
(2) type of label, (3) location of label, and
(4) quantity required, and include a return
shipping address.

No. Part No. Description (Qty)
1 HC165025-04 Decal — Beater Warning Black(1)
2HC165025-03 Decal — Beater Warning Twist (1)
3 HC165126 Decal — Panel Removal Warning (3)

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 vii
HC165025-03
HC165025-04 Located
behind the
head
Safety Decal Locations (continued)
HC165126
Hazardousrotatingbeatershaft.Donot
operateunitwithdispenseheadremoved.
Beforeremovingdispensehead:
1.Setallcontrolsto"OFF",and
2. setpowerswitchto"OFF"position.
WARNING
Hazardousrotatingbeatershaft.Donot
operateunitwithdispanseheadremoved.
Beforecleaningmachine:
1.Setallcontrolsto"OFF",and
2. setpowerswitchto"OFF"position.
WARNING
WARNING
Hazardous rotating beater shaft. Do not
operate unit with dispense head removed.
Before removing dispensing head:
1. Set all controls to “OFF”, and
2. set power switch to “OFF” position
WARNING
Hazardous rotating beater shaft. Do not
operate unit with dispense head removed.
Before removing dispensing head:
1. Set all controls to “OFF”, and
2. set power switch to “OFF” position
WARNING
Hazardous moving parts.
Machine starts automatically.
Do not operate with panel
removed.

viii 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
Table of Contents
Safety Decal Locations ........................................................ vi
1 Introduction .................................................................... 1
2 Note to Installer............................................................... 1
2.1 Uncrating and Inspection............................................2
2.2 Installation..................................................................3
2.3 Electrical Requirements-Models SLX500 and SLX400 .3
2.4 Electrical Requirements - Model SLX400E ONLY..........4
2.5 Electrical Connections................................................4
3 Specifications ................................................................. 5
3.1 Particulars ..................................................................5
3.2 Data Plate ...................................................................6
3.3 Reference Information ................................................6
3.4 Installation Date..........................................................6
3.5 Dimensions ...............................................................7
3.6 WEEE (Waste Electrical and Electronic Equipment)....7
4 Virtual Quality Management System Terminology ............ 8
5 Part Names and Functions............................................. 10
6 Operator Controls and Indicators ................................... 13
6.14 Mix Feed Tube ............................................................16
7 Operator Display Menus ................................................ 17
Operator’s Menu Options..................................................... 18
8 Disassembly and Cleaning............................................. 20
8.1 ...................................................................................Cleaning
Accessories ........................................................................20
8.2 ..................................................................................Disassembly
Instructions .........................................................................21
8.3 ...................................................................................Cleaning
Instructions .........................................................................23
9 Assembly....................................................................... 25
10 Start-up Instructions..................................................... 28
10.1 Sanitizing....................................................................28
10.2 Priming ......................................................................30
11 Closing Procedures....................................................... 32
11.1 Night Switch Operation ...............................................32
11.2 Draining Product from Freezer ....................................33
12 Soft Serve Information................................................... 34
12.1 Overrun ......................................................................34
12.2 Rerun..........................................................................34
13 Routine Maintenance .................................................... 35
14 Trouble Shooting Tables ............................................... 39

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 ix
Part II
Replacement Parts Orders
Figure 1 Head Assembly ..................................................... 1
Figure 2 SLX400E Beater Shaft Assembly ........................... 2
Figure 3 SLX500 Beater Shaft Assembly ............................. 3
Figure 4 Mix Feed Tube Assembly ....................................... 4
Figure 5 Contactor Box....................................................... 5
Figure 6 Capacitor Box ...................................................... 5
Figure 7 Control Center ..................................................... 6
Figure 8 Switch Assembly................................................... 7
Figure 9 Panel View (Sheet 1 of 2)....................................... 8
Figure 10 Assembly View ................................................... 10
Accessories ........................................................................ 12

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 1
2 Note to Installer
1 Introduction
Gravity fed soft serve freezer models
SLX400, SLX400E, and SLX500 are
designed to produce soft serve ice
cream, ice milk, yogurt, and similar frozen
dairy products, with a product serving
temperature range of 15 to 25°F (-9 to
-4°C). If such products are prepared
from powdered concentrate, they should
be precooled to 40°F (4°C) prior to
introduction to the freezer. Use of other
products in this machine is considered
misuse (see Warranty).
This manual has been prepared to assist
you in the proper operation and general
maintenance of the Electro Freeze model
SLX400E, and SLX500 freezers.
Make sure all personnel responsible for
equipment operation completely read and
understand this manual before operating
the freezer. When properly operated and
maintained, the freezer will produce a
consistent quality product.
If you require technical assistance, please
contact your local authorized Electro
Freeze Distributor, as follows:
Name: ________________________
Address: ______________________
Phone:________________________
For factory service assistance—contact
H. C. Duke & Son, LLC, Electro Freeze
Service Department as follows.
Phone: [phone]
[phone]
FAX: [phone]
E-mail: [email protected]

This freezer must be installed and serviced by an Electro Freeze Distributor or
authorized service technician in accordance with the installation instructions.
After installation the warranty registration card must be completed and returned to
validate the warranty.
CAUTION
THE DISPENSING HANDLE
MUST BE COMPLETELY
CLOSED AFTER EACH DRAW.
FAILURE TO CLOSE THIS
HANDLE WILL ENGAGE THE
REFRIGERATION SYSTEM
CAUSING A FREEZE UP AND
DAMAGE TO BELTS, GEAR
REDUCER, AND MOTORS
COULD OCCUR.
IMPORTANT
DISPENSING HEAD MUST BE
INSTALLED FOR BEATER
MOTOR(S) TO OPERATE.
DO NOT INTERCHANGE HEADS
FROM OTHER FREEZERS.

2 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
2.1 Uncrating and Inspection
Figure 2-1 Machine bolted to Shipping Base
CAUTION
Be sure to properly support
the machine when removing
bolts and installing legs or
casters.
When the unit is received and while
the carrier is still present, inspect the
shipping carton for any damage that
may have occurred in transit. If the
SHOCKWATCH® label indicates red and/
or the carton is broken, torn, or punctured,
note the damage on the carrier’s freight
bill and notify the carrier’s local agent
immediately.
1. Remove the carton from the pallet,
and move the machine as close as
possible to the permanent location.
2. Remove the shipping bolts on the
bottom of the freezer (gure 2-1) and
install either the legs or casters (gure
2-2).
Figure 2-2 Installing Mounting Legs or Casters
NOTE: Screw casters
or legs all the way in
coupling, then adjust
to level side to side
with a 1/4” slope to
the front.
REAR OF UNIT
FRAME WELDNUT
LEG SUPPORT
PALLET
REMOVE HEX HEAD BOLTS
(4) AND FLAT WASHERS
REAR OF UNIT
LEG SUPPORT
SET SCREW
LEG COVER
LEG
REAR OF UNIT
LEG SUPPORT
CASTER WITH BRAKE
CASTER WITHOUT
BRAKE

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 3
2.2 Installation
CAUTION
All materials and connections
must conform to local
requirements and be in
compliance with the National
Electrical Code (NEC).
1. The freezer is designed for indoor use
and must be protected from outdoor
weather conditions.
2. Where codes permit, Electro Freeze
recommends that the oor model
freezers be installed on casters and
have exible water and electrical
connections for easier service and
cleaning.
3. All models are required to be open
at the top, have a minimum 6-inch
(15.2 cm) rear clearance and 0 inches
on the side panels for adequate
ventilation. Anything blocking
ventilation of the freezer (including
cone dispensers) will reduce the
efciency of the freezer.
4. Air cooled model SLX500 will need
an air deector if the unit is to be
placed against a rear wall. The 6”
wide x 21-7/8” long deector is to be
mounted to the lower rear screws on
the back panel of the freezer. Failure
to install the deector will void
warranty.
5. Water-cooled models require a
3/8-inch MPT water inlet and water
waste connection. The connections
are found on the bottom, under the
compressor mounting area. They
are tagged “Water Inlet” and “Water
Waste.” A manual shut-off valve
should be installed in the water inlet
line at the time of installation. The
water pressure must be between
35-140 psig (241-965 kPa) for proper
operation.
6. Place the freezer in its nal location
and adjust the legs or casters so that
it is level side-to-side and the front is
approximately 1/4-inch lower than the
rear to allow proper drainage of the
freezing cylinder.
2.3 Electrical Requirements-Models SLX500 and SLX400
CAUTION
To prevent accidental electrical
shock, a positive earth ground
is required.
1. Always verify electrical specications
on the data plate (gure 3-1) of each
freezer. Data plate specications will
always supersede the information in
this manual.
2. Supply voltage must be within + 10%
of voltage indicated on the nameplate.
Also, on three-phase systems,
voltage between phases must be
balanced within 2%. (More than a
6 volt difference between any two
voltage measurements at 208-230
volts indicates a possible imbalance.)
Request your local power company to
correct any voltage problem.
3. An easily accessible main power
disconnect must be provided for all
poles of the wiring to the freezer.

4 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
CAUTION
To prevent accidental electrical
shock, a positive earth ground
is required.
1. Freezer requires one power supply.
Always check the data plate for proper
fuse size, wire ampacity, and electrical
specications.
2. Refer to the wiring diagram provided
for proper power connections.
3. Electrical connections for models
SLX500 are made in a junction box.
Facing the front of the freezer it is
located behind the right side panel
towards the back and bottom of the
frame.
4. The Model SLX400E is supplied with
a cord, a NEMA 6-20P plug that plugs
into a 6-20R receptacle. See Figure
2-3.
2.5 Electrical Connections
4. Use a exible connection when
permissible. Copper wires are
required for connection to freezer.
All materials and connections must
conform to local codes and/or the
National Electrical Code.
5. For all 3 phase freezers, beater shaft
rotation must be clockwise as viewed
from the front of the freezer.
3. Supply voltage must be within ±10%
of voltage indicated on the nameplate.
4. An easily accessible main power
disconnect must be provided for all
poles of the wiring to the freezer.
2.4 Electrical Requirements - Model SLX400E ONLY
CAUTION
To prevent accidental electrical
shock, a receptacle with
a positive earth ground is
required.
1. Always verify electrical specications
on the data plate (gure 4-1) of
each individual freezer. Data plate
specications will always supersede
the information in this manual.
2. This freezer requires a protected 20
amp 220 volt circuit. Connect the
freezer to a circuit separate from
any other electrical equipment. The
freezer plug will t a NEMA 6-20R
receptacle. See gure 2-3.
Figure 2-3 Plug

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 5
3.1 Particulars
3 Specifications
Width (in/cm) ........22-1/8 / 56.2
Height (in/cm).......60-11/16 / 154.15
Depth (in/cm).......30-1/8 / 76.52
SLX500 SLX400E
Weight (lb/kg) ................................539 / 244........................... 475 / 215
Cylinder Compressor.....................2 HP / 10500 (BTU/hr)...... 1.3 HP / 6900 (BTU/hr)
1.9 kw (Motor)................... 1.3 kw (Motor)
3.2 kw (Cooling)................ 2.1 kw (Cooling)
Hopper Compressor......................1/10 HP / 500 (BTU/hr)..... 1/10 HP /500 (BTU/hr)
Beater Motor..................................(2) 2 HP/ 1.5 kw................ (2) 1 HP/ 0.75 kw
Refrigerant - Cylinder ....................R-404a.............................. R-404a
Refrigerant - Hopper......................R-134a.............................. R-134a
Charge Cylinder (lbs/kg)(A/C)).....4.4 / 2.0.............................4 / 1.81
Charge -Cylinder (lbs/kg)(W/C).....3.75 / 1.7........................... 3.75 / 1.7
Charge - Hopper (oz/kg)...............7 / .2.................................. 7 / .2
Cooling ..........................................Air or Water ...................... Air or Water
Hopper (qt/ltr) ................................(2) 16 / 15.1...................... (2) 12 / 11.4
Cylinder (qt/ltr)...............................(2) 3.7 / 3.5....................... (2) 2.7 / 2.6
A/C = Air Cooled
W/C = Water Cooled

6 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
The data plate provides important
information that the operator should
record and have available for parts
ordering, warranty and service requests.
Write in
Reference
Information HERE!

3.3 Reference Information
Fill in this information as soon as you
receive the Electro Freeze SLX Soft
Serve Freezer. The item numbers,
encircled, correspond with the call-out
numbers in gure 3-1.
1.) Model Number: ________________
2.) Serial Number: _________________
3.) Electrical Spec: Voltage__________
Phase _______ Hertz ___________
4.) Maximum Fuse Size:_____________
5.) Minimum Circuit Ampacity: ________
3.2 Data Plate
Figure 3-1
Fill in the date of installation, and the name, address, and phone number of the
installer in the space provided below. This information will be needed when ordering
parts or service for the SLX freezer.
Date of installation: __________________________________
Installed by: __________________________________
Address: __________________________________
__________________________________
Phone: __________________________________
3.4 Installation Date
Figure 3-1 Plug

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 7
Figure 3-2 Electro Freeze SLX Series
The dimensions of the SLX Series
freezers are provided in gure 3-2 below.
3.5 Dimensions
3.6 WEEE (Waste Electrical and Electronic Equipment)
In conformity with EU 2002/96/EC,
this freezer, at the end of life cycle,
is not to be discarded with normal
urban waste. Instead, it is the user’s
responsibility to dispose of this product
by returning it to a collection point
designated for the recycling of electrical,
electronic components and separation
of reclaimable, recyclable materials.
Contact your local distributor or authority
for correct disposal.
4X4 ELECTRICAL
JUNCTION BOX
3/8 FPT WATER OUT/IN
(WATER COOLED ONLY)
AIR OUTAIR IN

8 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
4 Virtual Quality Management System
(VQM) Terminology
Amp Control Board: ........ This board is located in the main contactor box
responsible for monitoring the beater motor amperage
and communicating that value to the main P.C. Board.
Beater Run:..................... This D.O.B. timer used to delay the beater motor after
the refrigeration shuts down. Beater Run Range: 0 to 10
seconds
Demand Run Comp:....... The D.O.B. timer used to delay the compressor when
product is being drawn. Demand Run Comp. Range: 0 to
12 seconds
Dual Diff:......................... The differential used when product is being drawn out of
the center spigot or when both side spigots have been
drawn simultaneously. Dual Hysteresis range: 7 to 20°F
Differential (Hyst):........... Symbolizes the differential setting. Hysteresis range: 7 to
20°F i.e. if your cut in is at 18°F and your Hysteresis is
at 10°F your unit will cut out at 8°F
Idle Run Comp:............... Delay on break (D.O.B.) timer used for the compressor
when the unit is in idle mode/no product being drawn.
Idle Run Comp. Range: 0 to 20 seconds
Idle:................................. When the unit is cycling on temperature and no product
is being dispensed
Lock outs:........................ Allows the function of a specic feature/button to be
temporarily disabled to deter unnecessary usage of that
feature.
Main P.C. Board:............. Main Control board for the unit, housed behind the trim
strip panel. This board has many connectors on it and is
responsible for the main operations of the unit.
Membrane Switch:.......... The black Electro Freeze decal visible on the front of the
unit, which houses the hidden operator, technician, soft,
and hard keys used to navigate the menus
Single Diff: ...................... The differential used when product is being drawn out of
one barrel. Single Hysteresis range: 7 to 20°F
Slope/Demand Slope: .... Utilizes a function within the system to watch the
temperature change as the unit freezes a barrel. If
utilizing the slope feature and the unit sees a lack of
temperature change during freeze down, the unit will
cycle off. This will prevent a freeze up condition due to a
long run time. Demand Slope range: 0 to -0.2

ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
184584 9
Temp. Comp.:.................. Temperature compensation, utilized when the slope
feature is turned on. It prevents the system from
seeing the slope temperature curve until a determined
temperature is reached. Once that temperature has been
reached then the system will examine the curve and shut
down if necessary. Temp. Comp. Range: -10 to 22°F
Temperature Offset:........ A function that allows temperature adjustment to the
operator. Adjustable from 1-9 and 5 being neutral/no
change, Lower than 5=colder and greater than 5=warmer
U.I./ User Interface:......... The board that lies directly behind the membrane switch
on the front panel. This board houses the LED screen
that displays the menus and operations. The membrane
switch is connected to this board via a ribbon cable. This
board also has its own software.
4 Virtual Quality Management System
(VQM) Terminology (continued)

10 184584
ELECTRO FREEZE Soft Serve Models SLX400E, SLX500
5 Part Names and Functions
6.) ROD - PLUNGER:
Starts the freezer when dispensing.
Must be in place for proper
operation.
7.) PIN - HANDLE:
Secures handle to the head.
8.) KNOB - HAND:
Secures the head to the freezing
cylinder.
9.) HANDLE - DISPENSE - SIDE:
Opens and closes the plunger to
start and stop the ow of product
from the freezer.
10.) HANDLE - DISPENSING -
CENTER:
Opens and closes the plunger
to start and stop the ow of swirl
product from the freezer.
11.) NOZZLE - SERRATED:
Forms the frozen product as it is
dispensed.
1.) HEAD - DISPENSE:
Encloses the freezing cylinder and
provides an opening for product to
be dispensed.
2.) O-RINGS - HEAD:
Seals the head to the freezing
cylinder. Must be lubricated.
3.) PLUNGERS - DISPENSE - SIDE:
Seals the product opening in the
head when closed. Allows product
to ow when open.
4.) O-RINGS - PLUNGER:
Seals the plunger in the head. Must
be lubricated to seal and slide freely.
5.) PLUNGER - DISPENSE - CENTER:
Seals the product opening in the
head when closed. Combines ice
cream from both cylinders to form
swirl cones.
The following descriptions refer to gure 5-1. The number preceding the part name
corresponds to the number in the gure.
Figure 5-1 Head Assembly
PLUNGERS - SIDE
PLUNGERS - SIDE
PLUNGER - CENTER
ROD - PLUNGER
O-RINGS - PLUNGER
O-RINGS - PLUNGER
O-RINGS - HEAD
HEAD - DISPENSE
PIN - HANDLE
KNOB - HAND
HANDLE - SIDE
HANDLE - SIDE
HANDLE - CENTER