Williams MHC10 User manual
OPERATING MANUAL FOR MOBILE HEATED CABINETS
IMPORTANT INFORMATION (PLEASE RETAIN THIS DOCUMENT)
This Manual covers the installation, operation and routine maintenance requirements for the
following Williams Refrigeration products:
MHC10
MHC16
Please read this Manual carefully before connecting the appliance.
Provided the instructions in this Operating Manual are read and implemented correctly, the
optimum performance and reliability of your equipment should be maintained.
We assume the installer, user and service provider are appropriately trained, skilled and
competent to properly and safely carry out the work, and will use the necessary safety
equipment, and take the necessary precautions required of their intended work.
Williams cabinets/counters are available in a choice of temperature ranges and specic ambient
ratings.
The Williams Mobile head Cabinet range temperature parameters are set as follows:
MHC +78°C(173°F) / +82°C (180°F)
General Regulations
Declaration of Conformity:
Williams Refrigeration declares that all products manufactured by Williams Refrigeration
comply with the above directives as they apply to those products, and those products are
therefore declared to be in conformity with the provisions of the above legislation.
Model No.: ...............................................................................
Serial No.: ................................................................................
WWW.WILLIAMS-REFRIGERATION.COM
2
INSTALLATION
INSTALLATION
REMOVAL OF REDUNDANT APPLIANCES
Heated cabinet appliances contain gases in their
insulation and must be disposed of professionally by
a licensed waste management contractor.
Please ensure that old or redundant appliances are
disposed of safely and legally. It is recommended
that doors are removed prior to disposal in order to
ensure safety.
UNPACKING
Remove all external and interior packing and
accessories. Ensure all such material is disposed
of safely.
Check that no damage has occurred to the
appliance, power cable and plug top during transit. If
damage has occurred do not use the appliance.
The appliance should be installed in a well ventilated
room on a at and level oor.
PROTECTIVE COATING
The polished stainless steel surfaces are protected
during manufacturing and transport by an adhesive
plastic coating.
This should be removed prior to placing your
appliance into use. Carefully peel away to reveal
the polished stainless steel surface. Care should be
taken to ensure that no adhesive residue remains
on the surface. Any stubborn or tough adhesive
marks can be removed by following the advice on
Page 5.
LEVELLING (CASTORS/FEET)
The appliance should stand level to ensure the
correct operation of self-closing doors.
Models tted with castors are non-adjustable.
Therefore a level platform / oor should be
provided where the appliance is to be located.
Where swivel and brake castors are tted and it
has been positioned, please ensure its brakes have
been activated by pressing the metal bar down.
Remember to release the brakes before trying to
move it.
WARNING SYMBOL
This symbol is positioned on the
cabinet as a warning that the
item maybe hot and should be
touched with care.
MAINS CONNECTION
Commercial kitchens and foodservice areas
are environments where electrical appliances
may be located close to liquids, or operate
in and around damp conditions or where
restricted movement for installation and
service is evident.
Great care must be exercised at all times when
installing, operating, or servicing this appliance.
For appliances tted with a moulded plug for safety,
ensure that the mains power cable is extended
free from the refrigeration system to avoid
entanglement. If a plug or mains cable requires
replacement, contact the Williams Spares Oce on
+44(0)1553 817017.
The installation of a xed appliance and periodic
inspection should only be undertaken by a qualied,
skilled, and competent electrician; and connected
to the correct power supply suitable for the load as
stipulated by the appliance data label.
The electrical installation and connections should
meet the necessary requirements to the local
electrical wiring regulations and any electrical safety
guidelines.
All appliances rely upon a suitable connection to
earth to ensure safe operation. If in doubt, contact
a qualied, skilled, and competent electrician before
using the appliance.
We recommend:-
• Supplementary electrical protection with the
use of a residual current device (RCD)
• Fixed wiring appliances incorporate a locally
situated switch disconnector to connect to,
which is easily accessible for switching
o and safe isolation purposes. The switch
disconnector must meet the specication
requirements of IEC 60947
3
Your attention is drawn to:-BS 7671:2018 -
Guidance note 8 - 8.13 : Other locations of
increased risk
It is recognised that there may be locations of
increased risk of electric shock other than those
specically addressed in Part 7 of BS 7671.
Examples of such locations could include laundries
where there are washing and drying machines
in close proximity and water is present, and
commercial kitchens with stainless steel units, where
once again, water is present.
Where because of the perception of additional risks
being likely, the installation designer decides that an
installation or location warrants further protective
measures, the options available include:
• Automatic Disconnection of Supply (ADS) by
means of a residual current device having
a residual operating current not exceeding
30mA;
• Supplementary protective equipotential
bonding; and
• Reduction of maximum fault clearance time.
The provision of RCDs and supplementary bonding
must be specied by the host organisation’s
appointed installation designer or electrical
contractor and installed by a suitably qualied
and competent electrician so as to comply with
Regulations 419.2 and 544.2.
SHELF/SLIDE FITTING
When positioning slides on standard cabinets and
counters, present slide to racking by holding it in
the opposite hand to the side of the cabinet to that
which they are to be applied. Present slide at a 45°
angle (See Figure 1). When in place, let slide drop
into position to create a horizontal ledge on which
the shelves will sit.
LOADING / SHELF DISTRIBUTION
Before loading, allow the appliance to reach its
normal operating temperature.
When loading the appliance, please ensure that its
load is equally distributed throughout and ensure air
can circulate around and through stored products.
Care should be taken when loading the appliance.
Do not obstruct the air ducts. Take care of any parts
with possible sharp edges.
LOCKING FACILITY
On models with a locking facility, it is recommended
that the key be removed from its lock during normal
working use. This will prevent bending or breaking
of the key which could result in the lock having to be
replaced.
Removing the key will also prevent accidental
locking when the door is open. This will prevent the
door from closing properly and cause the interior
temperature to fall. If not checked in time, a loss of
food may result.
FIG 1.
INSTALLATION
4
CONTROLLER
CONTROLLER / DISPLAY
The display should be checked daily to ensure that
the correct temperature is being maintained.
Switching on your Appliance
Switch the appliance on or o by pressing and
holding for 3 seconds when it is in standby
mode (display shows “- - -“).
Key to Controls
! Maintenance indicator
Fan running indicator
LED display (temperature/alarm)
Up and down adjustmen
Enter button
Standby switch
Hi-Lo Alarm
The controller features a built in audio / visual Hi-
Lo alarm. If the temperature within the appliance
exceeds the factory set alarm temperatures for 60
minutes or more, the controller will emit an audible
alarm signal and ‘AL’ will ash until the temperature
returns to normal operation.
The audible alarm may be cancelled by pressing any
button. The alarm will go o again after 60 minutes
if the fault has not been addressed. However, ‘hi’
or ‘Lo’ will continue to show in the LED Display until
the cabinet returns to temperature or a fault is
corrected.
If the cabinet goes over a temperature greater than
114°C, the cabinet will automatically cut out and
an engineer will be required to reset and check the
system.
ADJUSTING THE OPERATING
TEMPERATURE
The thermostat is built in to the controller and is
adjustable between factory set parameters.
All units are factory pre-set, however conditions
on site will vary compared with test conditions
and it maybe necessary to perform the following
adjustments in order to obtain a perfect
temperature cycle.
To adjust operating temperature;
Press and hold
Use keys to adjust.
Then release .
If no further adjustments are made within 10
seconds, the desired operating temperature will
be stored, and the display will revert to the actual
cabinet operating temperature.
PROBE FAIL SAFE FEATURE
The controller features a fail-safe condition. In the
event of a temperature probe failure, ‘PF1’ will be
displayed.
Should a probe failure occur please contact Williams
Refrigeration Engineering Oce on +44 (0) 1553
817000 for a replacement part stating the unit’s
serial number.
CONTROLLER
5
APPLIANCE ROUTINE MAINTENANCE / CLEANING
APPLIANCE ROUTINE MAINTENANCE / CLEANING
ROUTINE MAINTENANCE
Safely disconnect the appliance from the
power supply before cleaning, servicing or
undertaking general maintenance.
This appliance must be maintained at regular
intervals. The frequency of maintenance will depend
upon your specic use and location. The maximum
service interval should be 12 months.
Service and maintenance should only be undertaken
by suitably qualied, trained and competent
engineers.
CLEANING
Always wear appropriate personal protective
equipment (PPE) when cleaning the appliance. Care
should be taken for parts with possible sharp edges.
Stainless steel is naturally corrosion-proof and
needs no additional protective coating to maintain
its gloss and usability for a long time.
Abrasive or corrosive cleaning agents should never
be used. These can damage surfaces and cause
corrosion. They include:
• Cleaners containing chloride;
• Bleaches containing hypochlorite (if accidentally
spilled on stainless steel, rinse o with water
immediately and thoroughly);
• Silver polish
If the cabinet exterior is looked after correctly it will
retain an “as new” nish for many years. A damp
cloth is usually sucient for wiping away light dirt,
food debris and nger marks and normal day to day
cleaning should be carried out with a soft cloth and
soapy water.
Dry thoroughly afterwards and where possible
remove all racking, shelving and drawer ttings to
aid the process.
Kitchen fats, oils and greases can also cause brown
spots or staining to appear on the stainless steel
surface.
For stainless steel with visible polishing grains, clean
the steel with the grain - not against the grain. When
water has been used for cleaning or rinsing, wipe
the surface dry to prevent water from drying and
forming watermarks, especially in areas with hard
water. Avoid this type of watermark by using distilled
water.
For tougher spots, creamy polishes like CIF original
cream can be eective. Light pressure should be
used when cleaning with the grain. The cleaning
process should be repeated in order to prevent any
dirt becoming lodged in the surface grain again.
CIF original cream cleaner can also be used
for wiping o water spots and can alleviate
discoloration. Remove this type of residue by rinsing
with clean, preferably distilled water and wipe away
any remaining streaks of polish or watermarks.
Tough grease or oil marks can also be removed
using denatured alcohol or acetone. There is no risk
of corroding stainless steel by using such solvents.
For ease of use limit the amount of solvent used.
Wash more than once using a pure solvent on a
clean soft rag until all traces of the greasy residue
are removed.
Specialist Stainless Steel Cleaners - Non food
contact surfaces only
Innosoft B570 is a special deep cleaner that is
suitable for the intensive cleaning of contaminated
stainless steel surfaces, and removes stains and
oxides in a single operation.
Innoclean B580 completely removes any residues
left after the use of Innosoft B570 and passivates
the surface which helps to prevent further
corrosion.
SHELF / SUPPORT/ RACKING REMOVAL
First remove the shelves, then remove the shelf
supports by grasping rmly in the centre and lifting
slightly. Turn the shelf support towards the interior
of the cabinet by pushing it in the centre as you
twist the support through 90°. The shelf support
will be released. (NB: the supports are designed
to be anti-tilt and you may therefore experience
some resistance at rst which will be overcome with
practice). When all shelves have been removed,
remove the racking by lifting up and over the nylon
retaining blocks.
6
APPLIANCE ROUTINE MAINTENANCE / CLEANING
CLEANING / REPLACING THE GASKET
Door gaskets should be checked and cleaned
regularly and replaced if damaged. To clean the
gasket, wipe with warm soapy water and a soft cloth,
ensuring it is completely dry before closing the door.
DO NOT use a sharp knife to clean or scrape the
gasket. Damaged gaskets do not seal correctly and
can increase the amount of electricity consumed,
seriously aecting the eciency and performance of
the appliance.
Damaged gaskets are easily
replaced. Simply pull out the
existing part and push the new
gasket into the channel (gasket
retainer) at the centre and work
along, pushing gasket into
channel.
BREAKDOWN
You must immediately report any damage or defect
arising with the appliance. Unsafe equipment is
dangerous. Do not use the appliance. Isolate the
power supply and contact Williams Refrigeration or
your appointed Service Provider.
In the event of a breakdown, please contact Williams
Refrigeration or your Service Provider
When calling, please advise model and serial
number. This information can be found on the data
plate inside the appliance. Please ensure that all
redundant parts are disposed of safely and legally.
CHOOSING GENUINE SPARE PARTS
Choosing the correct spare parts is vital to the ongoing running of your appliance - that’s why Williams
Refrigeration oer a comprehensive network of servicing, support and spare parts all available directly from
Williams.
Our spare parts are exactly the same quality and standard as we use to build your appliance and have been
rigorously checked, tested and inspected to ensure the very best quality and exact t.
You can contact us directly for everything from fault diagnosis to parts selection and ordering. Simply
provide the serial number of your appliance and we will do the rest to ensure you receive the right part rst
time.
For further information please call our Spares Department on 01553 817017
7
8
PARTS & LABOUR WARRANTY POLICY - UK ONLY
Our warranty applies to equipment manufactured
by Williams Refrigeration and equipment bearing the
Williams name plate and serial number identication
tag.
We undertake, in conjunction with the supplying
agent, distributor or representative, to repair free
of charge during our standard business hours
any such piece of equipment or part thereof used
which is found to be faulty in either materials or
workmanship subject to the further conditions
below:-
WARRANTY TERMS AND PRODUCTS
COVERED
We oer a 24 months Warranty from our original
date of sale with the following Williams equipment:
1. Garnet / Zircon / Jade / Amber (stainless) / Mobile
Heated/ Mobile Refrigerated.
2. Reach-in Blast Chillers / Reach-in Blast Chiller
Freezers / Blast Chiller WTBC70.
3. Opal / Emerald / Onyx / Aztra / Salad Counters /
UBC / Chef’s Drawers / MaxiPrep Station.
4. Crystal Bakery Cabinets and Counters.
5. Meat Ageing Refrigerator.
We oer a 12 months Warranty from our original
date of sale for all other Williams equipment
including:
1. All Modular Products (including coldrooms).
2. Remote Systems.
3. Bottle Coolers.
4. GEM Multidecks (including heated) and
merchandiser cases.
5. GEM product range.
6. Bottle Well / Meat Freezer Well.
7. Thermowell.
8. Non standard and other products.
9. Front of House display cases.
10. White Goods.
WARRANTY TERMS
Our warranty is oered where the equipment has
been installed correctly and has not been subject to
misuse or abuse and is functioning correctly.
The equipment was purchased by the authorised
supplying distributor direct from Williams
Refrigeration and not through a wholesaler or other
supplier whose warranty terms may be dierent.
The Warranty Policy shall be non-transferable.
Replacement of defective equipment can only be
made with the approval of Williams Refrigeration.
Any repair under warranty will only be carried out
with the product in its position of operation or in a
suitable location on the customer’s premises. If the
product has to be removed for security or any other
reason, this will be subject to additional charge (may
include hydrocarbon charged equipment).
Warranty work will be covered by Williams
Refrigeration or by one of its appointed service
agents between the hours of 8.00am and 5.00pm
Monday to Friday. Any works undertaken outside of
these hours are chargeable.
CLAIMS PROCEDURE
If a customer wishes to make a claim under the
terms of this warranty, the following procedure
should be observed:
1. Contact the supplying agent, representative or
distributor.
2. Quote the equipment model, serial number and
date of installation. The serial number is located
on the product identication plate inside the
cabinet, modular product door frame or similar
location. It is recommended that operators
should also record the serial number on the
operating instruction booklet supplied with the
product.
3. Contents risk and insurance responsibility
remains at all times with the customer.
EXCEPTIONS TO STANDARD WARRANTIES
1. The Standard warranty applies to equipment
located in Mainland GB only and excludes
locations subject to restricted or secure
access,oshore and marine applications.
Additional time and travel charges may be
applied to the following locations – Isle of Wight,
Channel Islands, Isle of Man, Northern Ireland
and Scottish Isles.
WARRANTY
9
WARRANTY
2. Any fault that is not reported within 10 working
days of being discovered.
3. Service calls to equipment under warranty,
or service calls made under chargeable
arrangements will be carried out in accordance
with standard conditions of sale. Unless
otherwise specied, a maximum of 15 minutes
of administrative time, not spent directly carrying
out servicing work, is provided for within the
supply. Any requirement for sta attending
the call to spend greater time than 15 minutes
due to administrative requirements, such as on
waiting time or security clearance, or health and
safety risk assessments, will be chargeable at
our prevailing rate. We reserve the right to apply
Time Travel & Call out charges if no fault is found
with the product or access is either restricted or
denied to our attending engineer.
4. No claim shall exceed the original selling price.
5. Claims for Food and / or contents stored in the
equipment supplied (including pharmaceutical
or other items) and any consequential loss how
so ever arising are excluded under our warranty
terms.
6. Components including gaskets, doors, drawers,
handles, shelves, tray slides, all internal xings,
plug and lead, connectors, the outer shell,
castors / legs, food probes, refrigerant and
blockages as well as consumable items such as
(but not limited to) batteries, fuses, light bulbs,
printer cartridges, keys, glass and paper roll.
7. Equipment manufactured to the customers’ own
design, Williams Refrigeration will not be liable
for any defect, non performance or improper
operation of the equipment arising from any
drawing design or specication supplied by the
customer, their representative or agent.
8. Second hand equipment.
9. The customer uses or installs the equipment in
such a way that it exceeds its design envelope or
operates the equipment at control parameters
other than those provided as standard factory
settings.
10. The customer fails to observe commonly
accepted operating practices.
11. The customer has not properly cleaned or
maintained the equipment or carried out
necessary servicing, including cleaning of the
condenser, in accordance with instructions,
literature or directions issued by Williams
Refrigeration. (Operating Instructions are
supplied with all equipment but also available at
www.williams-refrigeration.co.uk).
12. Equipment fails through improper installation by
others, misuse, abuse, accidental damage, power
loss or uctuations, re, ooding or acts of god.
13. Any third party item(s) connected to the
equipment that may aect performance.
14. The customer permits persons other than
those authorised by Williams Refrigeration to
perform or aect repairs or adjustments to the
equipment.
15. If authorised representatives of Williams
Refrigeration are denied full and free rights of
access to the equipment for inspection during
normal business hours as previously stated.
16. If Repairs are made using spare parts
or replacement items not supplied or
preauthorised by Williams Refrigeration.
17. The initial equipment supply date shall apply for
warranty validity for the subsequent supply of
replacement of parts or products.
EXTENDED WARRANTY
Extended Warranty oers the opportunity to protect
your equipment (subject to conditions outlined) for
an additional period of up to 5 years inclusive of
original warranty periods.
Should you require Extended Warranty, state on
your order or notify the Dealer or Williams Sales
Manager at the time of purchase and they will be
able to arrange it for you.
To ensure your Extended Warranty Policy remains
valid, at least one maintenance / service visit per
year must take place in years 2, 3, 4 and 5.
For further information or clarication please
call 01553 817000 or email to
Williams Refrigeration, Bryggen Road, King’s
Lynn, Norfolk, PE30 2HZ
10
11
12
Williams Refrigeration Australia
38-42 Gaine Road
Dandenong South, Victoria 3175
Australia
Tel: +61 3 8787 4747
Fax: +61 3 8787 4787
www.williams-refrigeration.com.au
Williams Refrigeration
Bryggen Road
North Lynn Industrial Estate
King’s Lynn
Norfolk PE30 2HZ
Sales Tel: +44 1553 817000
Sales Fax: +44 1553 817111
Spares Tel: +44 1553 817017
Spares Fax: +44 1553 817020
www.williams-refrigeration.co.uk
Williams Refrigeration Hong Kong
Unit C, 12/F., Roxy Industrial
Centre,
58 - 66 Tai Lin Pai Road, Kwai
Chung,
New Territories, Hong Kong
Tel: +852 2407 5422
Fax: +852 2407 3767
www.williams-refrigeration.com.hk
Williams Silver Frost
2 rue Conventionnel Huguet
23000 GUERET
France
Tel: +33 5 55 52 27 88
Fax: +33 5 55 62 10 61
www.williams-silverfrost.com
Design Excellence : Cool Technology
0543_OP_MHC Mobile Heated O&M (E) | Rev 9| September 2022
Williams Dubai
PO Box 333215
607 Building 1B
Dubai Design District
Dubai
United Arab Emirates
Tel: +971 4 510 8203
Williams Refrigeration is a trading name of AFE Group Limited.
Registered in England & Wales under Registered Number
3872673. Registered Office Address - Bryggen Road,
North Lynn Industrial Estate, King’s Lynn, Norfolk, PE30 2HZ
www.williams-refrigeration.com
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