Hupfer OTA User manual

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OTA/OKO
Open tray dispensers/open sided basket dispensers
Operating instructions

All texts, illustrations and graphic designs are protected by
copyright. Reproduction, distribution and issuing are permitted
for internal company purposes only. © Hupfer Metallwerke
GmbH & Co. KG, Coesfeld 2022
Hupfer Metallwerke GmbH & Co. KG
Dieselstraße 20
48653 Coesfeld
Telephone: + 49 (0) 2541 805-0
Email: [e-mail]
Internet: www.hupfer.com
Manufacturer information
Index: 1, en_GB
Document information
Last update: 30.03.2022

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Operating instructions
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Table of contents
1 General information............................................................... 5
1.1 Product information......................................................... 5
1.2 Target group.................................................................... 5
1.3 Symbols.......................................................................... 5
2 Product description............................................................... 6
2.1 Function.......................................................................... 6
2.2 Overview......................................................................... 7
2.3 Equipment features......................................................... 8
2.4 Equipment options.......................................................... 8
2.5 Technical data................................................................. 9
2.6 Rating plate..................................................................... 9
3 Safety information................................................................. 10
3.1 Intended use................................................................... 10
3.2 Improper use................................................................... 10
3.3 Safety instructions........................................................... 11
3.3.1 General information............................................... 11
3.3.2 Transport................................................................ 11
3.3.3 Assembly............................................................... 11
3.3.4 Operation and use................................................. 11
3.3.5 Cleaning................................................................. 12
3.3.6 Maintenance.......................................................... 12
3.3.7 Safety devices....................................................... 12
4 Transport................................................................................ 12
4.1 Delivery........................................................................... 12
4.2 In-house transport........................................................... 13
4.3 Lifting.............................................................................. 13
5 Assembly................................................................................ 13
6 Commissioning...................................................................... 14
7 Operation................................................................................ 17
7.1 Moving the cart............................................................... 18
7.2 Loading with items.......................................................... 19
7.3 Dispensing items............................................................. 19

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8 Care and cleaning.................................................................. 19
8.1 Cleaning intervals........................................................... 19
8.2 Permissible cleaning types............................................. 20
8.3 Permissible cleaning agents........................................... 21
8.4 Material compatibility...................................................... 22
8.5 Manual cleaning.............................................................. 22
8.6 Disinfecting..................................................................... 22
9 Maintenance and repair......................................................... 23
9.1 Maintenance intervals..................................................... 23
9.2 Troubleshooting.............................................................. 23
9.3 Repairs and spare parts.................................................. 24
9.4 Recommissioning............................................................ 24
10 Disposal.................................................................................. 24

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Operating instructions
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■Maintenance work on mechanical systems or trained activities on
the electrical, cooling or heating systems
■Simple repairs
■Appropriately trained employees of the customer or an employee of
the manufacturer
■Standard operating steps
■Rectifying faults as described in the “Troubleshooting” section
■Cleaning
The operator or an authorised person must carry out the work.
■Check the condition of the entire unit
■Determine maintenance requirements
1 General information
1.1 Product information
Product names ■OTA – open tray dispenser
■OKO – open sided basket dispenser
1.2 Target group
These operating instructions are intended for the following groups of
people who perform the listed activities with or on the product:
Maintenance engineer
Operating staff
Operator
1.3 Symbols
DANGER
“Danger” indicates a hazardous situation that will result directly in
death or serious injury.
WARNING
“Warning” indicates a hazardous situation that may result in serious
injury.
CAUTION
“Caution” indicates a potentially hazardous situation that may result in
minor to moderate injury.

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NOTICE
“Notice” indicates a situation that may result in damage to property.
“Notes” give tips on the correct use of the product.
2 Product description
2.1 Function
Open tray dispensers and open sided basket dispensers transport and
dispense items at a constant height.
Open tray dispensers and open sided basket dispensers consist of
a base unit for stacking equipment and a platform for baskets or
trays, suitable for the stacking of baskets or trays. The items rest
securely on the platform for baskets or trays. As the load increases,
the spring-loaded platform for baskets or trays sinks. As the number
of items decreases, the platform for baskets or trays rises. Open tray
dispensers and open sided basket dispensers therefore ensure that
the items can be removed at a constant height.

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2.2 Overview
OTA variant – open tray dispenser
Fig. 1: OTA – open tray dispenser
1 Platform for trays
2 Corner bumper
3 Swivel castor with lock
4 Rear panel of the spring case
5 Rating plate
6 Push handle with impact protection
OKO variant – open sided basket dispenser
Fig. 2: OKO – open sided basket dispenser
1 Platform for baskets
2 Corner bumper
3 Swivel castor with lock
4 Rear panel of the spring case
5 Rating plate
6 Push handle with impact protection

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2.3 Equipment features
General information Sturdy, self-supporting design in stainless
steel.
Chassis Standard version with 2 swivel castors and
2 swivel castors with locks.
The swivel castors allow free manoeuvra-
bility in all directions.
Wheels and swivel cas-
tors
With polymer housing, ball bearing
mounted wheel arch and abrasion-free
rubber tyres.
Swivel castors with locks When engaged, the locks prevent the cas-
tors from swivelling and turning.
Platform for baskets or
trays
The spring-loaded platform for baskets or
trays accommodates matching baskets or
trays and presents the baskets or trays at a
constant height.
Spring case Contains the guide elements and tension
springs that hold the platform for baskets
or trays. The spring case protects against
access to the tension springs.
Handles For safely moving and steering the trans-
port cart.
Impact protection on every corner. Protects against damage
in the event of collision. The following com-
ponents protect the transport cart from
impact:
Corner bumpers
Handles with impact protection
2.4 Equipment options
The stacking equipment can be equipped with the following optional
accessories:
■Corrosion-resistant and maintenance-free polymer wheels, with
thread guard.

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2.5 Technical data
OTA OKO
Product name -- Open tray dispenser Open sided basket dispenser
Total weight kg 26 27
Max. load kg 80 80
Dimensions
W × D × H
mm 798 x 558 x 900 798 x 558 x 900
Lifting height mm 480 480
Approved items mm Trays
■530 × 370
■530 × 325
stackable
Baskets
■500 × 500
stackable
Effective dimensions
of the basic unit for
stacking equipment
mm depending on the platform for
trays
■540 × 380
■490 × 380
520 × 520
2.6 Rating plate
Fig. 3: Rating plate
1 Manufacturer and address
2 Type designation and product code
3 Order number
4 Total weight
5 Payload, total
6 Electrical connection
7 Model year
8 Product code as barcode
9 Electrical serial number
10 Induction frequency
11 Refrigerant
12 Refrigeration capacity
13 Protection code
14 Certification mark/CE label if available
15 Disposal of old appliances

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3 Safety information
3.1 Intended use
The open tray dispenser/open sided basket dispenser is intended for
the manual transport and provision of trays/baskets. Only approved
items may be transported with the stacking equipment. The items that
are suitable are determined by the size of the platform mounted for
baskets or trays.
Any use other than or beyond this is considered inappropriate.
Intended use includes following the prescribed procedures, complying
with the given specifications, and using the genuine accessories that
are provided or additionally available. Any other use of the unit is
considered inappropriate.
3.2 Improper use
The following uses are prohibited and are considered misuse:
■Loading with items other than those that have been approved.
■Transport of persons
■Transport of unsecured goods
■Exceeding the capacity
■Any misuse of the transport cart
■Manual preloading of the platform for baskets or trays or of the
tension springs.
It may not be used for transporting living creatures. Persons must not
sit or stand on or in the transport cart.
In the case of improper use, the manufacturer and suppliers shall
assume no liability for resulting damage. Damage caused by improper
use shall result in loss of liability and of guarantee claims.

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3.3 Safety instructions
3.3.1 General information
The stacking equipment may only be used in a technically sound con-
dition, while taking risks and safety into consideration, for its intended
purpose and in accordance with the operating instructions.
All operating elements and controls must be in a technically sound
condition and functioning reliably.
Before each use, the stacking equipment must be checked for any
visibly apparent damage and defects. If damage occurs, inform the
responsible offices immediately and take the stacking equipment out of
use.
Changes or conversions are only permitted after consultation and
written consent from the manufacturer.
the stacking equipment may move off independently and in an uncon-
trolled manner if the wheels are not locked.
3.3.2 Transport
Use only hoists and load handling devices approved for the total
weight of the stacking equipment during loading operations.
Only use transport vehicles that are approved for the total weight of the
stacking equipment.
The stacking equipment does not have any attachment points for eye-
lets or similar lifting aids.
3.3.3 Assembly
Pretensioned springs or holders for platforms for baskets or trays can
spontaneously release and cause injuries. Do not manually pretension
the tension springs or the platform for baskets or trays. Support the
holders for the platform for baskets or trays as required.
3.3.4 Operation and use
Stacking equipment can move off independently and in an uncontrolled
manner if the wheels are not locked. Secure the stationary stacking
equipment against rolling away.
Release the locks before moving. Engaged locks will damage the
chassis when moving.
Keep an overview of the route and move the stacking equipment with
foresight. Watch out for children, other persons and obstacles. Do not
move the stacking equipment up or down steps. Two persons should
move the stacking equipment on slopes.
Never catch tipping stacking equipment. Stacking equipment is heavy
when loaded and can cause serious injury. Move the stacking equip-
ment with foresight.

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Only secure stacking equipment with the locks when stationary. The
locks do not provide a braking function.
3.3.5 Cleaning
The transport cart must not be cleaned with high-pressure or steam
cleaners.
3.3.6 Maintenance
Troubleshooting may only be carried out by maintenance technicians.
Work on electrical equipment may only be carried out by electricians.
The work must be carried out in compliance with the rules of electrical
engineering.
Work on the refrigeration system may only be carried out by refrigera-
tion specialists. The work must be carried out in compliance with the
rules of refrigeration engineering.
3.3.7 Safety devices
The spring case prevents access to the tension springs. Access is only
permitted for adjustment of the tension springs and for maintenance
purposes.
Locks on the wheels. The locks must be engaged when the stacking
equipment is stationary to prevent the stacking equipment from rolling
away out of control.
4 Transport
NOTICE
Damage to the locks
The forces that occur during transport by lorry cause damage to
engaged locks.
−Secure the transport cart with a transport securing device.
−Release the locks during transport by lorry.
4.1 Delivery
Delivery is performed by a transport company, whose specialists are
responsible for securing the load during transport. At the place of
delivery, the transport cart can then be moved on its own wheels.

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4.2 In-house transport
WARNING
Risk of crushing
Persons may be crushed by stacking equipment rolling away out of
control.
−Never allow the stacking equipment to roll away unattended.
−Only transport the stacking equipment up or down an incline if
you can control it. If necessary, seek assistance from a second
person.
−Only park the stacking equipment on level surfaces.
−Each time you park the stacking equipment, secure it against
rolling away with both locks.
Only use transport vehicles that are approved for the total weight of the
transport cart.
■Release the locks.
4.3 Lifting
The transport cart does not have any attachment points for eyelets or
similar lifting aids.
Always transport the transport cart upright if possible. It can be lifted
using a lifting platform, for example.
5Assembly
CAUTION
Risk of injury
The pretensioned holder or the platform for baskets or trays may
spring up and injure persons.
−Support the holders before mounting the platform for baskets or
trays.
−Do not push down on the holders with your hands.
The basic unit for stacking equipment is supplied partially assembled.
Use the following steps to mount the platform on the basic unit for
stacking equipment.
Tab. 1: Required tools
Tool Size Quantity
Nut M6 8

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Tool Size Quantity
10 1
Fig. 4: Assembly of the platform for baskets or trays
1. Select the required components.
2. Support the holders prior to assembly.
3. Place the platform for baskets or trays on the base unit for
stacking equipment as shown in the figure.
🡆The threaded bolts are seated in the pre-drilled holes.
4. Tighten the bolts.
🡆You have bolted the platform for baskets or trays to the basic
unit for stacking equipment.
6Commissioning
NOTICE
Instructing operating staff
Before commissioning, operating staff must be instructed how to
operate the transport cart correctly.
Help protect our environment. Separate the pack-
aging materials and recycle them. Dispose of:
−Packaging and foils in the (yellow) recycling bin.
−Cardboard boxes and paper in the paper recy-
cling bin.
1. Check the functions, paying particular attention to the lock.
2. Adjust the tension springs to the items.
3. Clean the stacking equipment thoroughly before first use.
🡆The stacking equipment is ready for commissioning.

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Calculating the capacity
It is possible to calculate how many items stacking equipment can
hold.
Step 1 The intermediate stack height hz of the items can be calculated using the
following formula. Measure any missing values.
Formula hz = intermediate stack height
hn = height between n items
h1 = height of 1 item
hz =(( hn – h1 )/ (n – 1))
Example hn = 120 mm
h1 = 20 mm
hz = ((120 – 20) / (11 – 1)) = 10
Step 2 The capacity of the stacking equipment can be calculated using the fol-
lowing formula
Formula hz = intermediate stack height
hst = lifting height of the plat-
form for baskets or trays
h1 = height of 1 item
n = number of items on the
platform for baskets or trays
(not stacked)
Capacity = [((hst – h1) / hz) + 1] × n
Example hst = 458 mm
h1 = 20 mm
n = 3
Capacity = [((458 – 20) / 10) + 1] × 3
Capacity = 132 items
(44.8 was rounded down to 44)
Check the tension spring setting on the OKO
1. Place 2 baskets with a normal load on the platform for baskets.
🡆The platform for baskets will sink.
2. Measure the distance between the top edge of the baskets and
the top edge of the spring case.
Distance < 30 mm 30 to 50 mm > 50 mm
Adjustment Distance too small:
Unhook the tension
springs
Correctly adjusted Distance too large:
Hook on the tension
springs
Check the tension spring setting on the OTA
1. Place 20 trays on the platform for trays.
🡆The platform for trays will sink.

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Fig. 5: Position of the screws
Fig. 6: Remove the rear panel
2. Measure the distance between the top edge of the tray and the
top edge of the spring case.
Distance < 30 mm 30 to 50 mm > 50 mm
Adjustment Distance too small:
Unhook the tension
springs
Correctly adjusted Distance too large:
Hook on the tension
springs
CAUTION
Risk of injury
Sharp edges and tension springs may cause injury when hooking and
unhooking the tension springs.
−Wear protective gloves.
The tension springs in the spring case ensure that the platform for bas-
kets or trays is lowered evenly when items are placed on the platform
for baskets or trays such that the top edge of the item remains at a
constant height. The number of springs hooked on must be adjusted to
the total weight of the items.
Opening the spring case
1. Remove the items from the platform for baskets or trays.
🡆The loading platform is in the starting position.
2. Remove the marked screws [1].
3. Lift the rear panel slightly [2]. Use a screwdriver to help if neces-
sary.
4. Tilt the rear panel as shown in the figure [3].
5. Pull the rear panel out in a downward direction [4].
🡆The spring case is open and the tension springs are freely
accessible.
NOTICE
Damage to the guide elements
The tension springs must be hooked on symmetrically. If the tension
springs are only hooked on one side, the platform for baskets or trays
will be damaged.
−Hook or unhook the tension springs equally on the left and right.
6. Always unhook the tension springs from the bottom. Make sure
that the tension springs are symmetrically distributed.

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7. Check the adjustment of the tension springs.
8. Remove the items from the guide basket.
9. Repeat the steps until the tension springs are correctly adjusted.
🡆The tension springs are correctly adjusted.
10. Close the rear panel of the spring case.
11. Screw the screws back in.
7 Operation
CAUTION
Risk of injury
The pretensioned platform for baskets or trays can push up objects
very quickly and injure persons.
−Only load the platform for baskets or trays with the approved
items – never push it with your hands.
−You should also keep an eye on untrained persons.
CAUTION
Risk of injury
If you load the platform for baskets or trays manually, the tension
springs will be visible. The tension springs and guide elements
present a risk of injury.
−Only load the platform for baskets or trays with the approved
items – never push it with your hands.
−Never reach into the tension springs or the guide elements.
−You should also keep an eye on untrained persons.
NOTICE
Damage to the locks
If the locks are engaged when the transport cart is moving, the func-
tioning of the locks will be impaired.
−Only engage the locks when the transport cart is stationary.

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7.1 Moving the cart
WARNING
Risk of crushing
Persons may be crushed by stacking equipment rolling away out of
control.
−Never allow the stacking equipment to roll away unattended.
−Only transport the stacking equipment up or down an incline if
you can control it. If necessary, seek assistance from a second
person.
−Only park the stacking equipment on level surfaces.
−Each time you park the stacking equipment, secure it against
rolling away with both locks.
Engaging the locks
Swivel castors with locks can block the wheel from turning and swivel-
ling. When the locks on both swivel castors are engaged, the transport
cart is secured against rolling away.
Engage the lock as shown on the left.
🡆The wheel cannot turn or swivel.
Move the transport cart using the handle
CAUTION
Risk of injury
Items on the base plate can slip out and injure bystanders when the
stacking equipment is moved.
−Place the items on the platform for baskets or trays.
−Remove all items from the base plate.
When moving the stacking equipment, do not place any items on the
base plate.
1. Release the locks.
2. Move the stacking equipment with both hands on the handles.
3. Engage the locks when the stacking equipment is stationary.

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7.2 Loading with items
CAUTION
Risk of injury
If stacking equipment is overloaded, objects may fall or be ejected
upwards and injure persons.
−Do not load the platform for baskets or trays any higher than the
upper edge of the spring case.
−Only load the platform for baskets or trays with the approved
items – never push it with your hands.
−You should also keep an eye on untrained persons.
You can load the items onto the stacking equipment.
1. Do not exceed the permitted payload when loading the platform
for baskets or trays and do not stack items any higher than the
upper edge of the spring case.
2. Place the items down flat from above.
3. Load the platform for baskets or trays evenly.
4. Watch out for children and untrained persons who are unaware of
the dangers involved in handling the transport cart.
7.3 Dispensing items
You can unload the items from the stacking equipment.
1. Lift out the items.
2. Load the platform for baskets or trays evenly.
3. Watch out for children and untrained persons who are unaware of
the dangers involved in handling the transport cart.
8 Care and cleaning
8.1 Cleaning intervals
Interval Maintenance work Personnel
After each use and
according to the in-house
hygiene concept
Clean the stacking equipment Operating staff
As needed and according
to the in-house hygiene
concept
Disinfect the stacking equipment Operating staff

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8.2 Permissible cleaning types
Cleaning type Definition of the cleaning opera-
tion
Approval for
open tray dispensers/open
sided basket dispensers
Manual cleaning Dry Cleaning with dry cleaning agents
Damp Cleaning with a damp cloth and
degreasing liquid cleaner
Wet Cleaning with a wet sponge and
degreasing liquid cleaner
Water hose Pressure ≤ 8 bar Cleaning with a spray jet and
degreasing cleaning agents if
required:
■Do not spray into the bearings
High-pressure/
steam cleaning
High-pressure
≤ 200 bar
Cleaning the surfaces:
■max. 30-90 seconds
■Do not spray into the bearings
■Use a flat stream nozzle
■Keep a distance of at least 30
cm
Wet steam
≤135° C
Cleaning the surfaces:
■max. 30-90 seconds
■Short exposure time for indi-
vidual sections
■Do not spray into the bearings