ELECTRO FREEZE SLX400C User manual

OPERATOR'S MANUAL
with Replacement Parts List
H.C. Duke & Son, LLC P/N 184584 September, 2016 Printed in USA
SOFT SERVE
TWIST MODEL
SLX400C
184582 9/16

Operator's Manual
for the
Electro Freeze Model
SLX400C
Soft Serve Freezers
All contents © Copyright 2014 H.C. Duke & Son, LLC, 2116 Eighth Avenue, East Moline Illinois 61244

iv 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
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 SLX400C
184582-01 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 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
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
FAX:
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)
2 HC165025-03 Decal — Beater Warning Twist (1)
3 HC165126 Decal — Panel Removal Warning (3)

ELECTRO FREEZE Soft Serve Models SLX400C
184582-01 vii
HC165025-03
1HC165025-04
Located behind
the head
2
Safety Decal Locations (continued)
P/N 165126
3
Hazardous rotating beater shaft. Do not
operate unit with dispense head removed.
Before removing dispense 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 dispanse head removed.
Before cleaning machine:
1. Set all controls to "OFF", and
2. set power switch to "OFF" position.
WARNING
BOTH SIDES

viii 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
Table Of Contents
Safety Decal Locations .................................................... v
Table of Contents .............................................................. vii
Table of Contents (continued).......................................... viii
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 Specications ........................................................... 5
3.1 Particulars....................................................................................5
3.2 Data Plate ....................................................................................6
3.3 Reference Information................................................................ 6
3.4 Installation Date .........................................................................7
3.5 Dimensions ................................................................................7
4 Virtual Quality Management Terminology ............. 8
4 Virtual Quality Management System....................... 9
5 Part Names and Functions ...................................... 10
6 Operator Controls and Indicators ........................... 13
6.14 Mix Feed Tube ..........................................................................16
7 Operator Display Menus .......................................... 17
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
10.2.1 Standard Priming Instructions .............................................30
10.2.2 Priming Instructions for Freezers Built into a Wall ............31

ELECTRO FREEZE Soft Serve Models SLX400C
184582-01 ix
Table of Contents (continued)
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
14.1 Virtual Quality Management (VQM) System
Display Trouble Shooting Messages ..........................45
Replacement Parts
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
O-Ring Chart ............................................................. 13

ELECTRO FREEZE Soft Serve Models SLX400C
184582-01 1
2 Note to Installer
1 Introduction
Gravity fed soft serve freezer model
SLX400C is 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
SLX400C.
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.

2 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
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 Casters
NOTE: Screw legs all
the way in coupling,
then adjust to level
side to side with a 1/4”
slope to the front.

ELECTRO FREEZE Soft Serve Models SLX400C
184582-01 3
2.2Installation
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 6 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. 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.
5. 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.
2.3Electrical Requirements-Models SLX400C
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 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
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. The Model SLX400C is supplied
with a cord an a NEMA 6-20P plug that
plugs into a 6-20R receptacle. See Figure
2-3.
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.
2.5Electrical Connections
5. For all 3 phase freezers, beater
shaft rotation must be clockwise as
viewed from the front of the freezer.
4. An easily accessible main power
disconnect must be provided for all poles
of the wiring to the freezer.
2.4Electrical Requirements - Model SLX400C 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.
3. Supply voltage must be within
±10% of voltage indicated on the
nameplate. Figure 2-3 Plug

ELECTRO FREEZE Soft Serve Models SLX400C
184582-01 5
3.1Particulars
3 Specifications
Width (in/cm)........................... 22.12 / 56.2
Height (in/cm)...................... 41.77 / 106.09
Depth (in/cm) ....................... 30.22 / 76.75
SLX400E
Weight (lb/kg).............................................................................................................425 / 190
Cylinder Compressor .............................................................................. 1 HP / 6900 (BTU/hr)
..........................................1.3 kw (Motor)
.......................................2.1 kw (Cooling)
Beater Motor .................................................................................................(2) 1 HP/ 0.75 kw
Refrigerant - Cylinder....................................................................................................R-404a
Charge Cylinder (lbs/kg)(A/C)).....................................................................................4 / 1.81
Charge -Cylinder (lbs/kg)(W/C)..................................................................................3.75 / 1.7
Cooling...................................................................................................................Air or Water
Hopper (qt/ltr).........................................................................................................(2) 12 / 11.4
Cylinder (qt/ltr) ....................................................................................................... (2) 2.7 / 2.6
A/C = Air Cooled
W/C = Water Cooled

6 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
Write in
Reference
Information HERE!
3.3Reference Information
Fill in the following information as soon as
you receive your Electro Freeze SLX400C
freezer. (The item numbers —encircled,
below — correspond to the call-out
numbers in gure 3-1.)
1) Model Number: _________________
2) Serial Number:__________________
3) Electrical Spec: Voltage ________
Phase _______ Hertz _________
4) Max. Fuse Size:__________________
5) Min. Circuit Ampacity ___________

3.2Data Plate
The data plate provides important
information that the operator should
record and have available for parts
ordering, warranty inquiries and service
requests.
Figure 3-1

ELECTRO FREEZE Soft Serve Models SLX400C
184582-01 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
3.4Installation Date
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 freezer.
Date of installation: ____________________________________
Installed by: ____________________________________
Address: ____________________________________
____________________________________
Phone: ____________________________________
AIR FLOWAIR FLOW
19.50
(49.53)
22.12
(56.18)
23.82
(60.51)
14.10
(35.82)
16.48
(41.86)
5.62
(14.28) 4.00
(10.15)
29.12
(73.97)
5.50
(13.98)
30.22
(76.75)
37.77
(95.94)
34.77
(88.32)
41.77
(106.09)
39.01
(99.10)
22.12
(56.20)

8 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
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
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

ELECTRO FREEZE Soft Serve Models SLX400C
184582-01 9
4 Virtual Quality Management System
(VQM) Terminology (continued)
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.

10 184582-01
ELECTRO FREEZE Soft Serve Models SLX400C
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