Williams Ref MHC10 Installation Manual

This manual covers the Installation, Operation and Routine Maintenance requirements
for the following Williams Refrigeration products:

MHC10
MHC16

Provided the instructions in this Operating Manual are read and implemented correctly,
the optimum performance and reliability of your equipment should be maintained.

The Williams Mobile Heated Cabinet range temperature parameters are set as follows:
+78°C (172°F) / +82°C (180°F)

Declaration of Conformity References:
Low Voltage Directive 2006/95/EC
Machinery Directive 2006/42/EC
Electromagnetic Compatibility Directive 2004/108/EC
Pressure Equipment Directive 97/23/EC
Waste Electrical and Electronic Equipment Directive (WEEE) 2002/96/EC
Restriction on Use of Certain Hazardous Substances Directive (RoHS) 2002/95/EC

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.:

OPERATING MANUAL for
MOBILE HEATED CABINETS

INSTALLATION

Removal of Redundant Cabinets

Please ensure the old or redundant refrigeration cabinets and equipment 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.

Ventilation

Do not block vents by stacking boxes on top or in front of the unit as this could affect performance.

Castors

The cabinet should stand level to ensure correct operation of self-closing doors. Castors are non-adjustable. When cabinet
has been positioned, please ensure brakes have been activated by pressing metal bar down. Remember to release brakes
before trying to move cabinet.

Mains Connection

The cabinet comes fitted with a moulded plug for safety and must be earthed. If plug or cable fail, please contact the
spares office on [phone] for a replacement.

Shelf/Slide Fitting

When positioning slides on standard cabinets, 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.

Shelf Weight Distribution

Before loading, allow cabinet to reach normal operating temperature.

When loading cabinet, please ensure that load is equally distributed throughout and ensure air can circulate around
and through stored products. Ensure all items are covered and that raw and cooked foods are stored separately.

THERMOMETER

The controller is marked in Centigrade or Fahrenheit.
The Thermometer should be checked daily to ensure that correct temperature is being maintained.

Fig. 1

CONTROL PANEL

Initial Operation

The cabinet is designed to operate at a fixed temperature of +80°C once it has warmed up.

A safety device is fitted which will switch off the cabinet if the operating temperature exceeds a safe working level.
Please adhere to the operating temperatures. If the machine does switch off due to an excessive temperature, call a
service engineer immediately.
Switch cabinet on by pressing the on/off switch, when the temperature has reached the desired operating level, load
the food into the cabinet.

Adjusting the Operating Temperature

The operating temperature is adjustable between +50° and +85°C if required. However the food should be kept at
+70°C and above to ensure safety. To adjust the operating temperature follow the procedure below:

- Press and hold the green enter button

- Use the red up and down arrows to adjust the temperature

- When you are happy with the temperature release the green enter button

If no further adjustments are made within 10 seconds, the desired operating temperature will be stored and display will
revert to the actual cabinet operating temperature.

NB: All machines are preset at the factory, however conditions on site will vary compared with test conditions
and it may be necessary to perform the above adjustments several times in order to obtain a perfect
temperature cycle.

ROUTINE MAINTENANCE

All maintenance should be carried out by a competent, qualified person. We recommend regular preventative
maintenance using a qualified service provider in order to get the best from your equipment.

CLEANING

Exterior: If cabinet exterior is looked after correctly it will retain an “as new” finish for many years. Normal day to

day cleaning should be carried out with a soft cloth and soapy water. For a stainless steel finish, always wipe
cabinet in same direction as the grain. Whilst stainless steel is robust, the satin smooth finish can be spoilt by wiping
against the grain. Never use abrasive materials or cleaners, or chemical cleaners.
These can damage the surface and cause corrosion. Occasionally, the exterior surface should be polished with a good
stainless steel polish to protect it.

Interior: Racking can be removed for easy cleaning (see Figure 2),

cabinet interior should be cleaned regularly with warm soapy water
and a soft cloth. Dry thoroughly afterwards and where possible remove
all racking and shelving to aid the process.

To remove racking and shelf supportd, follow this procedure:

First remove shelves, then supportd by gripping formly at the centre
and lifting slighlty. Turn shelf support towards cabinet interior by
pushing at the centre as you twist support through 90°. The shelf
support will be released. (Note: the supports are designed to be
anti-tilt and some resistance may be experienced at first. This will be
overcome with practice). When all shelves have been removed,
remove the racking by lifting up and over the nylon retaining blocks.

Fig. 2

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 affecting the efficiency and performance of the cabinet. Damaged gaskets are easily replaced. Simply pull
out existing part and push new gasket into channel (gasket retainer) at centre and work along, pushing gasket into
channel. Continue with additional three sides, pushing corners in last.

BREAKDOWN

In the event of a breakdown, please check thermostat setting and fuse before calling service engineer. When
calling, please advise model and serial number. This information can be found on identification plate inside cabinet.
It should also be noted on the cover of this booklet. Please ensure that all redundant parts are disposed of safely
and legally.