WILLIAMS REFRIGERATION SC900, SC1200, PC900 Operating Manual

To achieve the optimum performance and reliability of your Chiller please read and
follow these installation, operating, cleaning and maintenance instructions. Failure to
do so may affect the warranty of your equipment.

Temperature parameters are set as:

Sandwich Chiller +2°C (36°F) / +5°C (41°F)

Pastry Chiller +5°C (41°F) / +8°C (47°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

CFC Free Refrigerant

We declare that all products manufactured by Williams Refrigeration comply with the above
directives where applicable and as such are declared to be in conformity with the provisions
of the above legislation.

Model No.:

Serial No.:

OPERATING MANUAL
GEM SANDWICH CHILLER SC900 & 1200
GEM PASTRY CHILLER PC900

Refrigerant Designation Global Warming Potential

HFC - R134a 1300

HFC - R404a 3260

INSTALLATION

Removal of Redundant Cabinets

Please ensure that 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

It is essential to ensure that the room in which the
unit is to be installed has adequate ventilation.
Refrigerators generate a considerable amount of heat
and, if operated in a small unventilated room in warm
weather, these will quickly cause the room temperature to
become excessive. This could cause the motor to
overheat and possibly damage the windings. At the very
least such an installation will cause the unit to use an
excessive amount of electricity. The SC1200 Sandwich
Chiller generates 2850W of heat, the SC900 2450W and
the PC900 Pastry Chiller 715W.

In addition to ventilation in a room, please ensure that
the Chillers have 200mm clearance between the back of
the Chiller and the wall to ensure efficient and effective
performance. Do not block vents by stacking boxes on
top or in front of the unit as this could affect performance.

Castors

The Chiller should stand level to ensure correct
operation and proper drainage of condensate from the
evaporator.

It Is important that Display Chillers are positioned on a
level platform / floor. When in position ensure the brakes
have been activated by pressing the metal bar down.
Remember to release brakes before trying to move the

chiller.

Loading with Food

Sandwich and Pastry Display Chillers are not designed to
cool food from ambient temperature. It is essential that
all products placed in the display chiller have been chilled
to +2/+5°C (for the Sandwich Chiller) and +5/+8°C (for
the Pastry Chiller) before being placed inside. The unit
should be allowed 30 minutes with the night blind pulled
down to pull down to temperature before loading
(Sandwich Chillers only).

2

Mains Connection

The cabinet comes fitted with a 13 Amp fused plug and
must be earthed. If the plug or cable should fail please
contact the Williams Spares Department on +44 (0)1553
817017 for a replacement.

If the cabinet has been laid on its back or tipped,
DO NOT switch on immediately. Leave in an upright
position for at least one hour before switching on.

Shelf Fixing and Adjustment

Shelving is fitted in the central position as standard with
25mm adjustment up or down in a horizontal position.

To adjust:

● Isolate power supply before commencing with shelf
removal.

● Remove glass shelves before shelf adjustment begins.

● Place glass shelves carefully on a suitable surface to
avoid damage.

● Unplug power lead from the three shelf lights.

● Lift the glass supports and remove from the Chiller
(Fig. 1).

● To remove the shelving brackets loosen the retaining
screws. Lift the front of the bracket (Fig. 2) and pull
gently towards the front of the cabinet (Fig. 3). The
bracket should now detach freely.

● Repeat this process in reverse to refit the shelves.

● Brackets must be set at equal heights for each side of
the shelf.

● Light supports can be placed in any of the three slots
depending on where you require the light.

Fig. 1

Fig. 2

Fig. 3

3

OVERNIGHT OPERATION

Night blind must be closed overnight with the magnet
in the blind attached to the surround of the sneeze
screen (Fig. 7) and NOT to the front of the condenser
cover (Fig. 8), as this will cover the vent and impair
performance.

Carefully tilt glass back
until safety cord is taut.

Fig. 6

Correct fitting of
magnetic night blind,
allowing air to be drawn
into the condenser.

Fig. 7

Lighting Removal

● Slide the light fitting back until it is clear of the first
mount (Fig. 4).

● Slide it back out over the mount and continue until light
fitting is removed (Fig. 5).

● Reverse process to refit.

Curved Glass Screen (Pastry Chiller Only)

The curved glass front of the Pastry Chiller should be
opened for cleaning. To do so stand in front of the unit
and slowly pull towards you until the safety chains
become taut. (Fig. 6).

Do not leave the chiller unattended with the screen in
the open position. If the glass is required to be opened

for an increased period of time then it should be removed
for safety reasons.

Removal of curved glass front:

● Two people are required.

● One person should ensure the glass is held in place
while the other removes the screws attaching the
cables to the Chiller.

● Standing with one person each side of the glass, open
fully and lift straight up to remove from the securing
angle at the base of the glass.

● Place glass shelves carefully on a suitable surface to
avoid damage.

Fig. 4

Fig. 5

Incorrect fitting of
magnetic night blind,
restricting airflow and
performance.

Fig. 8

FAULT DIAGNOSIS/DISPLAY CONDITIONS

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 the Chiller 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
the Chiller in the 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 chemical cleaners. These can damage the
surface and cause corrosion. The exterior surface should
be cleaned occasionally with a good quality stainless
steel polish, to protect it.

Interior: The Chiller’s interior should be cleaned
regularly with warm soapy water and a soft cloth. Before
cleaning commences turn off at the mains and isolate the
supply. Where possible remove all brackets, supports
and shelving as well as the evaporator tray to aid the
cleaning process.

4

Cabinet not
maintaining
temperature

Cabinet not operating

Fault/Display

Faults
displayed
by control

Flashing condenser
Clean LED

Possible Cause

No power supply

1. Dirty condenser

2. Air circulation restricted

3. Defective fan motor

4. Defector compressor relay

5. Loose electrical connection

6. Coil frozen

Clean

Remove restriction

Call engineer

Call engineer

Call engineer

Call engineer

Action

E1 or E2 - Control probe failure

hi or Lo - High/low temperature alarm

do - door open alarm

Call engineer

Call engineer

Shut door

Condenser requires cleaning

Air-cooled version

Remove cover and clean condenser
fins with clean brush

Check fuse or power source

SET UP OF CONTROL PANEL

LED Display

- Normal cabinet temperature displayed in LED window

- Probe 1 (air) failure (E1)

- Probe 2 (evaporator) failure (E2)

LED shows red to indicate unit running

LED illuminates red to indicate Evaporator is running

Initial Operation

Your cabinet is delivered ready to run. Plug into mains
and cabinet is ready to use. ‘- -’ will appear and the

temperature will be displayed. Wait until cabinet has
reached normal operating temperature (indicated on
control panel) before loading.

Adjusting the Operating Temperature

To adjust operating temperature, press and hold key
for 3 seconds. Use keys to adjust.

NB: All machines are factory preset, 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.

Probe Fail Safe Feature

The controller features a fail-safe condition. In the event
of a temperature probe failure, the compressor will
alternate at 5 minute intervals indefinitely between
running and not running condition and E1 or E2 will be
displayed. Normal compressor function will only be
restored when probe fault has been repaired.

Defrost Operation

When defrosting is in progress, the defrost indicator on
the control panel will become illuminated and dF will
appear in the LED display. Defrost is automatic and the
Chiller will go through an automatic defrost cycle at
preset intervals. The defrost operation does raise the
Chiller temperature slightly for a short period but does
not affect the product stored inside.

Light Operation

Low voltage shelf lighting is controlled by a single switch
on the control panel. The switch will become illuminated
when the lights are on.

5

To clean the evaporator tray:

Firstly remove its cover (Fig. 9). Remove any debris and
clean with warm soapy water. Dry thoroughly afterwards.

Condenser Cleaning

The condenser is part of the refrigeration unit. To access
the condenser for cleaning, carefully lift the front cover
and then pull forward from the Chiller (Fig.10). It requires
cleaning approximately four times per year or when the
LED indicates.

● Disconnect mains supply before cleaning.

● Brush fins vertically with a stiff brush, taking care not
to damage them or to push dirt / dust further in, and
then vacuum away..

● Remember to reconnect mains supply once

complete.

If there are further grease deposits still remaining on the
condenser call your Service Provider to carry out a full
service. NOTE: Non-compliance may invalidate your

Warranty.

Replace the unit cover and plug the Chiller in after
completing the cleaning process.

Fig. 9

EVAPORATOR/DRAINLINE

The drain is located at the front right hand side of the
chiller beneath the vented grill (Fig.11). Inspect this
periodically to ensure drain hole is not blocked.

BREAKDOWN

In the event of a breakdown, check the operating
temperature setting and fuse before calling a service
engineer. When doing so you will be asked to provide
the model and serial number. This information can be
found on the identification plate on the back of the Chiller.
It should be noted on the cover of this booklet. Please
ensure that all redundant parts are disposed of safely
and legally.

Fig. 10

Fig. 11

Drain location

6

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
identification 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 offer a 24 months Warranty from our original date of sale with the
following Williams equiment:

1. Garnet / Sapphire / Zircon / Jade / Amber (stainless) / Mobile Heated
/ Mobile Refrigerated.

2. Reach-in Blast Chillers / Reach-in Blast Chiller Freezers.

3. Opal / Emerald / Onyx / Aztra / Salad Counters.

4. Crystal Bakery Cabinets and Counters.

We offer 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 (including glycol).

3. Bottle Coolers.

4. Multidecks and merchandiser cases.

5. GEM product range.

6. Bottle Well / Meat Freezer Well.

7. Thermowell.

8. Coral Wall Mounted Units.

9. Non standard and other products.

10.Front of House display cases.

11.White Goods.

Warranty Terms

Our warranty is offered 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 different.

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 identification 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,offshore 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.

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 specified, a maximum of 15 minutes
of administrative time, not spent directly carrying out servicing work,

is provided for within the supply. Any requirement for staff 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 fixings, 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 specification 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 fluctuations, fire, flooding or acts of
god.

13.Any third party item(s) connected to the equipment that may affect
performance.

14.The customer permits persons other than those authorised by Williams
Refrigeration to perform or affect 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 offers 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 clarification please call 01553 817000 or
email to [email protected]

or write to Williams Refrigeration,

Bryggen Road, Kings Lynn, Norfolk, PE30 2HZ

7

WILLIAMS REFRIGERATION

Bryggen Road,

North Lynn Industrial Estate

King’s Lynn, Norfolk PE30 2HZ

Sales Tel: [phone] Fax: [phone]

Spares Tel: [phone] Fax: [phone]

Email: [email protected]

Website: www.williams-refrigeration.co.uk

WILLIAMS SILVER FROST

2 rue Conventionnel Huguet

23000 GUERET

France

Tel: [phone] Fax: [phone]

Email: [email protected]

Website: www.williams-silverfrost.com

WILLIAMS REFRIGERATION AUSTRALIA

38-42 Gaine Road

Dandenong South, Victoria 3175

Australia

Tel: [phone] Fax: [phone]

Email: [email protected]

Website: www.williamsref.com.au

WILLIAMS HONG KONG

4A Harrington Building,

36-50 Wang Wo Tsai Street, Tsuen Wan,

North Territories, Hong Kong

Tel: [phone] Fax: [phone]

Email: [email protected]

Website: www.williams-hongkong.com

SC & PC O&M

Rev 1

May 2013