Metcalfe EC12 User manual

Metcalfe EC12
Electrically Operated Potato Chipping Machine
Instruction Manual

1

2
INDEX
Guarantee 3
Delivery 3
Introduction 4
Chipper Dimensions 4
Installation 5
Electricity Supply Connection 5
Commissioning 6
Operation 6
Change Chip Sizes 7
Cleaning 7
Changing Knife Blades 8
Ordering Spare Parts 8
Wiring Diagram for Chipper 9
Exploded View 10
Electrical Control Parts 11
Parts List 12
Metcalfe Warranty 13

3
GUARANTEE
This equipment is guaranteed by Metcalfe for 1 year from the date of its purchase from
Metcalfe, or from one of its stockists, dealers or distributors. The guarantee is limited
to the replacement of faulty parts or products and excludes any consequential loss or
expense incurred by purchasers. Defects which arise from faulty installation,
inadequate maintenance, and incorrect use, connection to the wrong electricity supply
or fair wear and tear are not covered by the guarantee.
Please observe these instructions carefully.
The guarantee applies in this form to installations within the United Kingdom.
DELIVERY
The packaged machine consists of one chipper unit and one instruction booklet.
Please notify both the carrier and the supplier within three days of receipt if anything
is missing or damaged.
Check that the correct machine has been supplied and that the voltage, marked on
the rating plate, is suitable for the supply available. The rating plate is located on the
right-hand side of the case.

4
INTRODUCTION
The chipper is intended for cutting peeled potatoes into chips or scallops, in a batch
process.
CHIPPER DIMENSIONS
All dimensions are in mm.

5
INSTALLATION
For the Installer:
These instructions contain important information designed to help the user obtain the
maximum benefit from the investment in a Metcalfe Chipper.
Please read them carefully before starting work, and consult with the supplier in the
event of any queries.
Be sure to leave this Instruction Manual with the user after installation of the machine
is complete.
Procedure
The unit is designed to stand on a bench, table, or on a draining board. Ensure that
whatever is used for this purpose is sturdy and rigid and not more than 750 mm high.
A higher table makes it difficult to load the machine.
The Chipper should be placed where supplies of peeled potatoes from the peeling
machine are readily accessible, after which the output of chips need to be in easy
reach of the fryer.
The EC12 Chipper has a top loading hopper into which potatoes can be tipped from
either side or from the front. It is not handed, and no consideration need be given to
its loading direction. The discharge of chips is from the chute at the front of the
machine, and the machine should be placed so that this chute is directly over the
receiving container.
ELECTRICITY SUPPLY CONNECTION
A Wiring Diagram is shown on Page 9.
Position the Chipper in the chosen site. The electricity supply connection should be
made to a power outlet socket or isolator mounted on the wall close to the machine.
This socket or isolator must be accessible once the machine is installed. Before
connecting, check that the voltage shown on the rating is correct for the electricity
supply you have available. The outlet should be fused at 13 amps.
NOTE: The plug is fitted with a 10amp fuse.
WARNING: This machine must be earthed.
Should the supply cord become damaged then an approved electrician must fit a
replacement. The IEE Codes of Practice must be observed.
An equipotential bonding terminal is provided at the back of the unit near the cable
outlet for external earth bonding. Provision of an earth bond does not remove the
requirement for an earth in the electrical supply.

6
COMMISSIONING
Open the hopper by fully unscrewing the interlock knob at the front and lifting up until
the hopper is fully resting back on its hinges. Turn the rotor by hand to ensure that it
is completely free to rotate and that the knife block assembly is properly in position.
Replace the hopper and screw down the interlock knob until it is tight.
It is now safe to switch on at the wall socket and to start the machine by pressing the
start button on the front of the machine (green button). To stop the machine, press the
red button.
One of the safety features provided on the Metcalfe Chipper are the interlock devices
that ensures that the machine cannot run unless both the knife block and the hopper
are properly and fully in position. This makes it impossible for the operator to touch the
spinning rotor whilst it is running.
To confirm that the interlock is operating correctly press the start button to switch the
machine on. Then whilst it is still running, unscrew the hopper interlock knob. After two
or three turns the machine should switch off, but there are still two or three further
turns of the knob necessary before the hopper can be opened. The rotor should be
stationary within 2 seconds of the hopper being opened. If the knife block is not in
place, another interlock will prevent the machine from running.
OPERATION
With the machine running, feed peeled potatoes into the hopper. It will hold
approximately 12kg of potatoes, which self-feed into the mechanism of the machine
and discharge as cut chips from the chute.
Some care is necessary when loading, as the rotor will not accept abnormally large
potatoes, so these must be cut into two. The hopper is specially designed not to pass
potatoes which are over size and which could otherwise clog the mechanism. It is also
essential that only potatoes be fed in to this machine.
NOTE: take great care to ensure that there are no stones mixed in with the
potatoes.
A stone or any other foreign object will damage the cutting knives and could cause the
machine to jam. In this event the machine has an inbuilt protection device, which will
switch it off before the electric motor burns out. This overload protection feature will
automatically reset itself when it cools down but it is necessary to wait a few minutes
for this to happen. After clearing the jam resume operation by pressing the start button.
Should a stone damage the knife blades they must be replaced as further use could
break the blades.

7
This Chipper is designed for batch process work; switch the machine off once all the
potatoes have been cut. The motor is fitted with a thermal trip that will stop the
machine if the motor overheats. This protection feature will automatically reset itself
when it cools down but it is necessary to wait a few minutes for this to happen.
The machine will switch itself off in the event of failure of the electricity supply whilst
operating. When the supply is restored the machine must again be switched on. It is
fitted with no-volt release.
CHANGE CHIP SIZES
To change to a different size of chip, change the knife block assembly. Spare knife
block assemblies are available from Metcalfe. Open the hopper, lift out the knife block
and replace with the alternative selected. Knife blocks are available in the following
sizes from the standard range: 8mm, 11mm, 14mm and 14x17mm. Scallops can be
cut with similar knife block assemblies. The standard scallop size is 8mm.
CLEANING
It is essential to clean the machine at least once a day, preferably at the end of each
period of operation.
1. Switch off at the socket or isolator
2. Fully unscrew the interlock knob, open the hopper and lift it out of its hinge seating
at the back
3. Clean the hopper in a sink, dishwasher, pot wash or by hosing with a spray
4. Remove the knife block by lifting upwards, off its locating dowels
NOTE: Take care when handling the knife block. The blades are sharp.
5. Clean the knife block under a spray or running tap and remove any residual pieces
of potato. Visually inspect all blades for wear or damage, and replace the knife
pack as necessary. Do not attempt to straighten a bent blade - bent blades should
be replaced immediately.
6. Lift the rotor carefully off its spindle.
7. Clean the rotor in a sink, pot wash, etc.
8. Clean out the interior of the base unit and wipe over the exterior with a damp soft
cloth. Do not hose down the exterior of the machine.
DO NOT USE CLEANING MATERIALS CONTAINING ABRASIVES OR
BLEACHES.
9. Reassemble the machine, reversing the above disassembly procedure.
When replacing the rotor, ensure that it is put back square on its spindle. Make
sure that it is properly seated on its cross pin by turning it slowly until it drops onto
this seating. When replacing the knife block it should slip down easily on to its
dowel pins, make certain that it is fully down.

8
CHANGING KNIFE BLADES
The knife blades are supplied as a pack and individual blades cannot be changed.
Change the knife blade pack as soon as it is damaged or blunt. To change the knife
blade pack remove the knife block and undo the two screws securing the knife blade
pack. Dispose of the old blades carefully and screw the new knife blade pack in place.
See diagram below.
For optimum performance Metcalfe recommend changing the blade pack every 6
months, or sooner depending on usage.
NOTE: Take care when handling the knife block. The blades are sharp.
ORDERING SPARE PARTS
In the event that spare parts or accessories need to be ordered, please always quote the
SERIES AND SERIAL NUMBER of the machine. This is to be found on the rating plate
located near the supply cable.
For installations outside the UK please contact your supplier.
For information on Metcalfe spares and service, please contact:
Metcalfe Catering Equipment Ltd
Tel: [phone]
Fax: [phone]
Email: [e-mail]

9
WIRING DIAGRAM FOR EC12

10
EXPLODED VIEW

11
ELECTRICAL CONTROL PARTS

12
PARTS LIST
ITEM
PART NO
DESCRIPTION
ITEM
PART NO
DESCRIPTION
1
S61/121
Hopper assembly
11c
A10/266
Strain relief gland
M81A
Interlock body
11d
A10/224
Back nut
A12/011
Interlock spring
11e
G35/012
Fuse holder
M69
Interlock knob
11f
G35/004
Fuse 5x20 0.5A
D26/017
Interlock pin
11h
G30/343
Contactor 24V ac
M48
Interlock knob cap
11i
G60/427
Transformer terminated
2
S61/111
8mm Scallop knife block
11m
D25/033
M4 Shake proof washer SS
S61/112
8mm Knife block
11n
D20/011
M4 Full nut SS
S61/113
11mm Knife block
11o
D25/004
M5 Shake proof washer SS
S61/114
14mm Knife block
11p
D20/038
M5 Full nut SS
S61/115
14x17mm Knife block
11q
D25/062
M8 Lock washer SS
S61/131
Knife blade pack 8mm
11r
D20/014
M8 Full nut SS
S61/130
Knife blade pack 11mm
12
K08/043
Gasket strip
S61/129
Knife blade pack 14mm
13
S61/177
Motor assembly
S61/128
Knife blade pack 17mm
13a
E61/014
Motor mounting plate
L61/004
Scallop slicing blade
13b
D19/032
M5x12 Hex screw SS
D22/060
No 6 Self tapping screw SS
13c
D19/115
M6x30 Hex screw SS
3
C61/002 M1 Z
Rotor
13d
D20/013
M6 Full nut SS
4
S61/123
Hopper switch assembly
13e
A06/099
Drive pulley (keyed)
5
S61/127
Knife block switch assy
13f
L61/041
Bush (for drive pulley)
6
L61/013
Anti-deflection block
13g
D19/142
M4x25 Hex screw SS
D25/004
M5 shake proof washer SS
13h
G60/323
Motor Cable Assy
D19/032
M5x12 Hex Screw SS
14
S61/118
Bearing housing assembly
7
L61/009
Knife block locating pin
15
A02/068
O –Ring
D25/003
M10 spring washer SS
16
E61/015
Drive plate
D20/015
M10 full nut SS
17
D25/052
M6 Plain washer SS
8
L34/005
Knife block short pin
18
D25/005
M6 Shake proof washer SS
D25/052
M6 Plain washer SS
19
D20/013
M6 Full nut SS
D20/013
M6 Full nut SS
20
D19/038
M6x12 Hex screw SS
9
G45/109
On / off button
21
D27/031
Drive key
G45/110
Button protective boot
22
A06/090
Driven pulley 114-5M-25
G45/111
Button contacts NO & NC
23
D25/019
M6 25OD plain washer
10
A13/024
Hopper hinge
24
A05/044
Timing belt 850-5M-15
D25/033
M4 Shake proof washer SS
25
E61/007
Base plate
D19/120
M4x8 Hex screw SS
26
A13/108
Plastic foot
11
S61/172
Rear panel assembly
27
D21/044
M5x12 Pan screw SS
11a
E61/033
Rear panel
28
D25/004
M5 shake proof washer SS
11b
G60/101 M4
Mains cable with plug
Note: The parts list is for 230V 1ph 50Hz machines. For electrical parts for other voltages
please contact our spares department.

13
METCALFE WARRANTY
All Metcalfe products are guaranteed against defects in material and workmanship for a
period of one year from date of Invoice, except where specially noted.
The Company's obligation under this warranty is limited to repairing or replacing, without
charge, any part or parts found to be defective under normal use, in accordance to the
specified operations manual and capacity ratings.
On all return to factory warranty items, it is the responsibility of the purchaser to return
the entire unit to the factory, properly packed and labelled.
All repairs, alterations or replacement of materials or parts not authorised by Metcalfe
will automatically void all warranties in their entirety.
There is a limited 6-month warranty on the following:
•Mixer attachments (beater, whisk and dough hook)
•Parts purchased or supplied for the repair of Metcalfe equipment
This warranty does not cover the following:
•Failure due to neglect, abuse, careless handling or misuse of machine
•Failure caused due to improper maintenance
•Blender clutches
•Knives and gears on can openers
•Sharpening of slicer blades
Metcalfe and its suppliers reserve the right to make changes in design and specification
to any product without prior notification.

14
Electrical PAT Certificate
Test Detail
Results
Test Detail
Results
Item:
Item:
Class:
Class 1 / Class
2
Class:
Class 1 / Class 2
Date:
/ /
Date:
/ /
Appliance ID:
Appliance ID:
User ID:
M.C.E.
User ID:
M.C.E.
Visual:
Visual:
Earth Current:
amps
Earth Current:
amps
Class 1 Earth Result/RPE:
Ω
Class 1 Earth
Result/RPE:
Ω
RISO:
MΩ
RISO:
MΩ
1 EA:
MA
1 EA:
MA
Class 2 RISO:
MΩ
Class 2 RISO:
MΩ
1 EA:
MA
1 EA:
MA
Insulation (500V):
MΩ
Insulation (500V):
MΩ
Load:
KVA
Load:
KVA
Leakage:
MA
Leakage:
MA
Polarity (leads only):
Polarity (leads only):
Electrical PAT Certificate
Test Detail
Results
Test Detail
Results
Item:
Item:
Class:
Class 1 / Class 2
Class:
Class 1 / Class 2
Date:
/ /
Date:
/ /
Appliance ID:
Appliance ID:
User ID:
M.C.E.
User ID:
M.C.E.
Visual:
Visual:
Earth Current:
amps
Earth Current:
amps
Class 1 Earth Result/RPE:
Ω
Class 1 Earth Result/RPE:
Ω
RISO:
MΩ
RISO:
MΩ
1 EA:
MA
1 EA:
MA
Class 2 RISO:
MΩ
Class 2 RISO:
MΩ
1 EA:
MA
1 EA:
MA
Insulation (500V):
MΩ
Insulation (500V):
MΩ
Load:
KVA
Load:
KVA
Leakage:
MA
Leakage:
MA
Polarity (leads only):
Polarity (leads only):