Middleby Marshall PS520 User Manual
MiddlebyMiddleby
Middleby
MiddlebyMiddleby
MarshallMarshall
Marshall
MarshallMarshall
A MIDDLEBY COMPANY
owner's
operating
& installation
manual
PS520-Series Electric Ovens: English
®
PS520-Series
Model
PS520E
OVENS
PS520 (Single)
PS520 (Double)
©2003 Middleby Marshall Inc.
PS520 (Triple)
Part No. 52358
Price $30.00
P: 08/08 Rev. B
WARNING
FOR YOUR SAFETY, DO NOT STORE OR USE
GASOLINE OR OTHER FLAMMABLE VAPORS AND
LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER
APPLIANCE.
WARNING
Improper installation, adjustment, alteration, service, or
maintenance can cause property damage, injury, or
death. Read the installation, operation, and maintenance
instructions thoroughly before installing or servicing this
equipment.
NOTICE
The warranty is
demonstrated under the supervision of a factory-authorized installer.
NOT VALID
unless the oven is installed, started, and
NOTICE
Contact your authorized Service Agency to perform maintenance and
repairs. A Service Agency Directory is supplied with your oven.
NOTICE
Using any parts other than genuine Middleby Marshall factory-manufactured
parts relieves the manufacturer of all warranty and liability.
NOTICE
Middleby Marshall (Manufacturer) reserves the right to
change specifications at any time.
KEEP THIS MANUAL IN A VISIBLE LOCATION NEAR THE OVEN
FOR FUTURE REFERENCE.
ii
Model No.
Modéle No.
Serial No.
Serié No.
Installation Date
Date d'installation
MIDDLEBY MARSHALL
NO QUIBBLE LIMITED WARRANTY
(U.S.A. ONLY)
MIDDLEBY MARSHALL, HEREINAFTER REFERRED TO AS
“THE SELLER”, WARRANTS EQUIPMENT MANUFACTURED
BY IT TO BE FREE FROM DEFECTS IN MATERIAL AND
WORKMANSHIP FOR WHICH IT IS RESPONSIBLE. THE
SELLER’S OBLIGATION UNDER THIS WARRANTY SHALL
BE LIMITED TO REPLACING OR REPAIRING, AT SELLER’S
OPTION, WITHOUT CHARGE, ANY PART FOUND TO BE
DEFECTIVE AND ANY LABOR AND MATERIAL EXPENSE
INCURRED BY SELLER IN REPAIRING OR REPLACING
SUCH PART. SUCH WARRANTY SHALL BE LIMITED TO
THE ORIGINAL PURCHASER ONLY AND SHALL BE EFFECTIVE FOR A PERIOD OF ONE YEAR FROM DATE OF ORIGINAL INSTALLATION, OR 18 MONTHS FROM DATE OF PURCHASE, WHICHEVER IS EARLIER, PROVIDED THAT TERMS
OF PAYMENT HAVE BEEN FULLY MET.
This warranty is valid only if the equipment is installed, started,
and demonstrated under the supervision of a factory-authorized installer.
Normal maintenance functions, including lubrication, cleaning, or customer abuse, are not covered by this
warranty
Seller shall be responsible only for repairs or replacements
of defective parts performed by Seller’s authorized service
personnel. Authorized service agencies are located in principal cities throughout the contiguous United States, Alaska,
and Hawaii. This warranty is valid in the 50 United States
and is void elsewhere unless the product is purchased
through Middleby International with warranty included.
.
The foregoing warranty is exclusive and in lieu of all other
warranties, expressed or implied. There are no implied
warranties of merchantability or of fitness for a particular purpose.
The foregoing shall be Seller’s sole and exclusive obligation
and Buyer’s sole and exclusive remedy for any action, including breach of contract or negligence. In no event shall
Seller be liable for a sum in excess of the purchase price of
the item. Seller shall not be liable for any prospective or lost
profits of Buyer.
This warranty is effective on Middleby Marshall equipment sold on, or after, February 15, 1995.
no quibble
MIDDLEBY MARSHALL INC.
OVEN LIMITED WARRANTY
(Non U.S.A.)
The Seller warrants equipment manufactured by it to be free from
defects in material and workmanship for which it is responsible. The
Seller’s obligation under this warranty shall be limited to replacing or
repairing, at Seller’s option, without charge, F.O.B. Seller’s factory,
any part found to be defective and any labor and material expense
incurred by Seller in repairing or replacing such part. Such warranty
is limited to a period of one year from date of original installation or
15 months from date of shipment from Seller’s factory, whichever is
earlier, provided that terms of payment have been fully met. All labor
shall be performed during regular working hours. Overtime premium
will be charged to the Buyer.
This warranty is not valid unless equipment is installed, started,
and demonstrated under the supervision of a factory-authorized installer.
Normal maintenance functions, including lubrication, adjustment of
airflow, thermostats, door mechanisms, microswitches, burners
and pilot burners, and replacement of light bulbs, fuses and indicating lights, are not covered by warranty.
Any repairs or replacements of defective parts shall be performed by
Seller’s authorized service personnel. Seller shall not be responsible for any costs incurred if the work is performed by other than
Seller’s authorized service personnel.
When returning any part under warranty, the part must be intact and
complete, without evidence of misuse or abuse, freight prepaid.
Seller shall not be liable for consequential damages of any kind
which occur during the course of installation of equipment, or which
result from the use or misuse by Buyer, its employees or others of
the equipment supplied hereunder, and Buyer’s sole and exclusive
remedy against Seller for any breach of the foregoing warranty or
otherwise shall be for the repair or replacement of the equipment or
parts thereof affected by such breach.
The foregoing warranty shall be valid and binding upon Seller if and
only if Buyer loads, operates and maintains the equipment supplied
hereunder in accordance with the instruction manual provided to
Buyer. Seller does not guarantee the process of manufacture by
Buyer or the quality of product to be produced by the equipment
supplied hereunder and Seller shall not be liable for any prospective
or lost profits of Buyer.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OF
ALL OTHER EXPRESS AND IMPLIED WARRANTIES WHATSOEVER. SPECIFICALLY THERE ARE NO IMPLIED WARRANTIES
OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR
PURPOSE.
The foregoing shall be Seller’s sole and exclusive obligation and
Buyer’s sole and exclusive remedy for any action, whether in breach
of contract or negligence. In no event shall seller be liable for a sum
in excess of the purchase price of the item.
© 2003 - Middleby Marshall, A Middleby Company.
The Middleby Marshall logo is a registered trademark of Middleby Marshall, A Middleby Company.
Middleby Marshall Inc. • 1400 Toastmaster Drive • Elgin, Illinois 60120-9272 U.S.A. • (847) 741-3300 • FAX: (847) 741 4406
iii
TABLE OF CONTENTS
SECTION 1
I. MODEL IDENTIFICATION .............................................. 1
SERIES PS520 ELECTRICAL SPECIFICATIONS ............. 2
II. COMPONENT FUNCTION ............................................. 4
A. Conveyor Motor and Conveyor Belt ........................ 4
B. Blower Fan ................................................................. 4
C. Electric Heaters ........................................................ 4
D. Cooling Fan ................................................................ 4
E. Air Fingers and Blank Plates - See Figure 1-9 ........ 4
SECTION 2
I. UNLOADING ................................................................... 7
PS520 OVEN INSTALLATION
REQUIRED KITS AND EQUIPMENT .......................... 8
PARTS LIST FOR SERIES PS520 ELECTRIC OVEN
INSTALLATION KIT .................................................... 8
UTILITY ROUGH-IN DIMENSIONS AND POSITIONING
FOR PS520-SERIES OVENS .................................... 12
CIRCUIT BREAKER ..................................................... 12
ELECTRICAL SPECIFICATIONS ................................. 1 2
ELECTRICAL RATING ................................................. 12
SUPPLY WIRE .............................................................. 1 2
SUGGESTED ................................................................ 12
II. VENTILATION GUIDELINES ....................................... 12
III. ELECTRICAL CONNECTION INFORMATION FOR
PS520-SERIES OVENS. ........................................... 13
IV. ELECTRIC SUPPLY FOR ELECTRIC-HEATED
OVENS ...................................................................... 12
SECTION 3 INSTALLATION
I. CONTROL FUNCTIONS ................................................ 15
II. COMPONENT INFORMATION AND LOCATION ......... 16
A. Door Safety Switch .................................................. 16
B. Blower Switch .......................................................... 16
C. Heat Switch .............................................................. 16
D. Temperature Controller .......................................... 16
E. Conveyor ................................................................. 17
MEASURING CONVEYOR SPEED. ............................. 17
III. STEP-BY-STEP OPERATION ..................................... 18
A. Startup Procedures ................................................. 18
Daily Startup ................................................................. 18
Power Failure ............................................................... 18
B. Shutdown Procedure ............................................... 18
Page
TABLE OF CONTENTS
(Continued)
Page
IV. NORMAL OPERATION - STEP-BY-STEP ...................... 20
A.Daily Startup Procedure ........................................... 20
B. Daily Shutdown Procedure ...................................... 20
V. QUICK REFERENCE: TROUBLESHOOTING .............. 22
SECTION 4 MAINTENANCE
I. MAINTENANCE - DAILY ............................................ 24
A. Exterior ..................................................................... 24
B. Cooling Fan ............................................................... 24
C. Conveyor Belt .......................................................... 2 4
D. Crumb Pans ............................................................. 24
II. MAINTENANCE - MONTHLY ....................................... 25
A. Removing Conveyor From Oven For Cleaning ..... 25
B. Air Fingers Disassembly For Cleaning .................. 27
C. Reassembly of Air Fingers ..................................... 28
D. Reinstall End Plugs ................................................. 31
E. Conveyor Reassembly Into Oven .......................... 32
F. Checking Conveyor Belt Tension ........................... 32
G. Conveyor Belt Link Removal ................................. 33
H. Attaching Drive Chain ............................................. 3 4
III. MAINTENANCE - EVERY 3 MONTHS ......................... 35
A. Electrical Terminals ................................................ 35
B. Ventilation ................................................................ 35
IV. MAINTENANCE - EVERY 6 MONTHS ........................ 35
PS520-SERIES ELECTRIC OVEN KEY SPARE
PARTS ....................................................................... 36
KEY SPARE PARTS KIT ............................................... 36
SECTION 5 TROUBLESHOOTING
Troubleshooting Charts ...................................................... 3 7
SECTION 6 - PARTS LIST
SINGLE OVEN EXPLODED VIEW .................................... 41
RELAY PANEL .................................................................. 43
BLOWER ASSEMBLY ...................................................... 45
CONTROL PANEL ............................................................ 47
SINGLE CONVEYOR ......................................................... 49
SECTION 7 ELECTRICAL SCHEMATICS
Wiring Diagram, E208-240V 50/60/1, PS520 .................. 51
Wiring Diagram, E380-480V 50/60/1, PS520 .................. 52
Wiring Diagram, E230-240V CE PS520/1820S ............... 53
Wiring Diagram, E380-400V CE PS520/1820S ............... 54
iv
NOTE
Wiring Diagrams are in Section 7 of this Manual.
The diagram for each oven is also on the lower
inner surface of its Control Console.
SECTION 1
DESCRIPTION
I. MODEL IDENTIFICATION
The Middleby Marshall PS520-Series may be used either
as a single oven or stacked for use as double or triple
ovens.
A single PS520-Series Oven (Figure 1-1) is mounted on a
base pad with legs. A double oven (Figure 1-2) consists of
two,
stacked,
consists of three stacked single ovens. The lower oven is
mounted on a base pad.
On a double or triple oven, the ovens operate independently. All ovens use identical controls and components.
One oven can be cleaned or serviced, while the others are
operating.
single ovens. A triple oven (Figure 1-3)
SECTION 1
DESCRIPTION
Figure 1-1. Single PS520 Oven
Figure 1-2. Double PS520 Oven
Figure 1-3. Triple PS520 Oven
1
SECTION 1
DESCRIPTION
PS520 SERIES OVEN SPECIFICATIONS
Conveyor Belt Width 18.00″ (457mm)
Heating Zone Length 20.00″ (5098mm)
Baking Area Square Feet 2.5 sq. ft. (0.23 sq. m.)
Overall Dimension
Standard Single Oven w/Legs 42.00″ (1067mm) L ×
Overall Dimension
Double Oven 42.00″ (1067mm) L ×
Overall Dimension
Triple Oven 42.00″ (1067mm) L x
Weight of Single Oven 250 lb (93.3kg)
Shipping Weight 325 lb (121.3kg)
Shipping Cube 22.1 ft3 (0.62 m3)
Operating Range 8.3 kW/hr
Maximum Operating Temperature 550°F (287°C)
Warm-up Time 20 min.
Belt Speed Limits 1-10 minutes
35.21″ (894mm) W ×
21.72″ (786mm) H ×
35.21″ (894mm) W ×
37.27″ (947mm) H x
35.21″ (894mm) W ×
52.82″ (1342mm) H ×
SERIES PS520 ELECTRICAL SPECIFICATIONS
Main Blower & Control Circuit Phase Frequency Amperage Poles Wires
Elements Voltage Voltage Draw
208-240V 208-240V 1 Ph 50/60 Hz 39.9 Amp 2 Pole 3 Wire
HEATER AMPERAGE
Voltage kW Amp
208 8.3 39.9
230 7.6 33.0
240 8.3 34.6
380V Export 208-240V 1 Ph 50/60 Hz 21.8 Amp 3 Pole 4 Wire
HEATER AMPERAGE
Voltage kW Amp
380 8.3 21.8
400 9.2 23.0
480V 208-240V 1 Ph 50/60 Hz 17.3 Amp 3 Pole 4 Wire
HEATER AMPERAGE
Voltage kW Amp
480 8.3 17.3
(2 hot, 1 grd)
(2 hot, 1neut, 1 grd)
(2 hot, 1neut, 1 grd)
NOTE
Wiring Diagrams are contained in Section 7 of this Manual
and are also located inside the oven at the
bottom of the Control Panel
This Manual Must Be Kept For Future Reference
2
SECTION 1
DESCRIPTION
Figure 1-4. PS520-Series Oven Components Locations
3
SECTION 1
DESCRIPTION
II. COMPONENT FUNCTION (Figure 1-4)
II. COMPONENT FUNCTION
A. Conveyor Motor and Conveyor Belt
The conveyor belt is driven by a variable-speed electric
motor (Figure 1-5) operating through a gear reducer. The
motor speed is controlled by a digital control. The stainless-steel wire belt can travel in either direction at variable
rates ranging from 3 minutes to 30 minutes; this is the time
that a product can take to pass through the oven.
B. Blower Fan
The blower fans are located at the rear of the oven. These
blowers force heated air through the air fingers. The
BLOWER switch must be set to “ON” or “I” for oven
warmup and baking.
C. Electric Heaters
There is one heater element mounted on the inside of the
rear panel. The element is connected to an electrical
control which is energized by the temperature controller.
Blower Assembly
D. Cooling Fan — See Figure 1-5 and Figure 1-6
The cooling fan is located in the back of the oven. The
cooling fan draws air through its grille, blowing it through
the blower motor compartment and the control compartments into the oven top and exhausted out the front
louvers.
E. Air Fingers and Blank Plates - See Figure 1-7
E1. Air Fingers
An Air Finger Assembly is made up of three parts:
1. Outer Plate - The Outer Plate is the removable covering
with tapered holes, which direct the air stream onto the
product being baked.
2. Inner Plate -The perforated Inner Plate is vital in forming
the unique air jets. It must be assembled into the manifold
with its holes aligned with the holes of the outer plate.
3. Manifold - The Manifold is the assembly which slides
on tracks into the oven plenum.
Right Control Box
Figure 1-5. Machinery Compartment
Components
4
SECTION 1
DESCRIPTION
Figure 1-6. Cooling Fan
5
SECTION 1
DESCRIPTION
Half Blank Plate
F2. Blank Plates
1. Blank Plates- The Blank Plates are available to install
on the plenum where an air finger is not required.
Outer Plate
Blank Plate
Inner Plate
Finger
Manifold
Assembly
Baffle
Figure 1-7. Blank Plates (two sizes) and an Air Finger.
6
SECTION 2
INSTALLATION
SECTION 2
INSTALLATION
NOTE: The oven, when installed, must be electrically
grounded in accordance with local codes, or in the absence of local codes, with the National Electrical Code
(NEC), or ANSI/NFPA70.
NOTE
There must be adequate clearance between
the oven and any adjacent combustible construction. Clearance must also be provided
for servicing and for operation.
CAUTION
It is recommended that the oven be placed under
a ventilation hood for adequate air supply and
ventilation.
CAUTION
Do not obstruct the flow of ventilation air to and
from your oven. Do not obstruct the fan holes in
the rear of the unit.
CAUTION
I. UNLOADING
Your Middleby Marshall PS520-Series Oven is shipped
partially assembled. It will arrive in a carton on a crate.
Carton size for a PS520-Series Oven is:
44-1/4″ (1124mm) Long ×
37-1/2″ (953mm) Wide ×
23″ (584mm) High ×
The crate and carton must be examined before signing the
Bill of Lading. Report any visible damage to the transport
company, and check for the proper number of crates. If
apparent damage is found, make arrangements to file a
claim against the carrier. Surface Interstate Commerce
Regulations (U.S.A.) require that the claim must be
initiated by the consignee within 10 days from the date that
the shipment is received.
On ovens with the Machinery Drive Compartment
located at the right end, a minimum clearance of
0″ to a left side wall, 18″ to a right side wall and 6″
from a back wall to air openings at the rear of the
oven must be maintained.
For servicing and cleaning, a minimum of 18″
clearance from all walls is recommended.
7
SECTION 2
INSTALLATION
ITEM
NO. QTY PART NO. DESCRIPTION
1 4 3101908 LEG 4″ AD FT
2 2 48392 INSULATION BOTTOM TRAY
3 1 48394 BOTTOM TRAY WELDMENT
4 1 48396 TOP COVER
5 4 51387 SCREW MSSLT THREAD 8-32 × 1/2, 18-8
6 1 52358 OWNER'S OPERATING & INSTALLATION MANUAL
PARTS LIST FOR SERIES PS520 ELECTRIC OVEN
INSTALLATION KIT
Single and Double Stack Ovens
P/N 48397
PARTS LIST FOR SERIES PS520 ELECTRIC OVEN
INSTALLATION KIT
Triple Stack Oven
P/N 54593
ITEM
NO. QTY PART NO. DESCRIPTION
1 2 48392 INSULATION BOTTOM TRAY
2 1 48394 BOTTOM TRAY WELDMENT
3 1 48396 TOP COVER
4 4 51387 SCREW MSSLT THREAD 8-32 × 1/2, 18-8
5 4 M3828 PIN, ALIGNMENT
6 1 52358 OWNER'S OPERATING & INSTALLATION MANUAL
Figure 2-1. PS520-Series Electric Oven Installation Parts
8
SECTION 2
INSTALLATION
Figure 2-5. MODEL PS520 SINGLE OVEN DIMENSIONS
1
The Opening Height is Adjustable from 2-1/4 inch minimum
1
to 3-3/4 inch maximum in 1/2 inch increments.
9
SECTION 2
INSTALLATION
1
Figure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONS
The Opening Height is Adjustable from 2-1/4 inch minimum
1
to 3-3/4 inch maximum in 1/2 inch increments.
10
SECTION 2
INSTALLATION
Figure 2-7. MODEL 520 TRIPLE OVEN DIMENSIONS
1
The Opening Height is Adjustable from 2-1/4 inch minimum
1
to 3-3/4 inch maximum in 1/2 inch increments.
11
SECTION 2
INSTALLATION
UTILITY ROUGH-IN DIMENSIONS AND POSITIONING
FOR PS520-SERIES OVENS
WARNING
DO NOT USE CONDUIT OR GAS LINE
FOR GROUND CONNECTION.
CAUTION
IT IS RECOMMENDED THAT THE OVEN
BE PLACED UNDER A VENTILATION
HOOD FOR ADEQUATE AIR SUPPLY
AND VENTILATION.
ELECTRIC SUPPLY TO BE
PROVIDED BY CUSTOMER
CIRCUIT BREAKER
Separate circuit breaker with lockout/tagout electrical
shutoff for each oven. Wire each oven separately.
50 Amp circuit breaker for 208-240V, or 30 Amp circuit
breaker for 380-480V.
ELECTRICAL SPECIFICATIONS
DOMESTIC: 208V main blower motors and elements,
1 Ph, 39.9 Amp draw, 50/60 Hz, 208-240V control circuit,
2 pole, 3 wire system per oven (2 hot, 1 grd).
Do
NOT
use conduit for ground.
or
DOMESTIC: 240V main blower motors and elements,
1 Ph, 34.6 Amp draw, 50/60 Hz, 208-240V control circuit,
2 pole, 3 wire system per oven (2 hot, 1 grd).
230V main blower motors and elements, 1 Ph, 33.0 Amp
draw, 50/60 Hz, 208-240V control circuit, 2 pole, 3 wire
system per oven (2 hot, 1 grd).
Do
NOT
use conduit for ground.
or
EXPORT: 380V elements, 1 Ph, 23.0 Amp draw, 50/60 Hz,
208-240V control circuit and main blower motor,
4 pole, 4 wire system per oven (2 hot, 1 neutral, 1 grd).
400V elements, 1 Ph, 21.8 Amp draw, 50/60 Hz, 208-240V
control circuit and main blower motor, 4 pole, 4 wire
system per oven (2 hot, 1 neutral, 1 grd).
Do
NOT
use conduit for ground.
or
EXPORT: 480V elements, 1 Ph, 17.3 Amp draw,
50/60 Hz, 208-240V control circuit and main blower motor,
2 pole, 4 wire system per oven (2 hot, 1 neutral, 1 grd).
Do
NOT
use conduit for ground.
Figure 2-9. Typical PS520-Series Oven(s)
Installation
ELECTRICAL RATING
7.6 – 9.2 kW/hr.
SUPPLY WIRE
Supply wire size must be in accordance with the National
Electrical Code (current edition) and must be in compliance with local codes.
SUGGESTED
If space permits, service should be located near the
control console end of the oven(s) to allow convenient
access to safety switches.
CAUTION
UNIT MUST HAVE AIR VENT PLATES INSTALLED OR WARRANTY WILL BE VOID.
II. VENTILATION GUIDELINES
A mechanically driven ventilation system is recommended for
the PS520 Series Middleby Marshall conveyorized electric ovens.
Local codes and conditions vary greatly from one area to
another and must be complied with. Following are the
suggested requirements for good ventilation. Please remember these are recommendations or guidelines, you
may have a special condition or problem that will require
the services of a ventilation engineer or specialist. Proper
ventilation is the oven owner’s responsibility. Improper
ventilation can inhibit oven performance.
Please Note: There are now two “stand off” ‘C’ Channels
that must be installed in the field (See Section 6: PARTS LIST,
page 44-45 for reference, Item 5).
12
SECTION 2
INSTALLATION
These ‘C’ Channel brackets are installed in the vertical
plane using existing screws (Item 6) to support these ‘C’
Channels using the upper and lower Key Hole openings in
the ‘C’ Channels. The ‘C’ Channels are identical and once
installed will allow ample amounts of air through the cooling
fan mounted on the rear side of the ovem by keeping the
oven away from the rear wall.
If you have any questions about how to mount these two
‘C’ Channel brackets, kindly phone Middleby Technical
Services at 847-741-3300. Press 3, then 5 for Technical
Support.
III. ELECTRICAL CONNECTION INFORMATION
FOR PS520-SERIES OVENS.
WARNING
Authorized supplier personnel normally accomplish the connections for the ventilation
system, electric supply, as arranged by the
customer. Following these connections, the
factory-authorized installer can perform the
initial startup of the oven.
Check the oven data plate (Figure 2-10) before making any
electric supply connections. Electric supply connections
must agree with data on the oven data plate.
NOTE: The electric supply installation must satisfy the
requirements of the appropriate statutory authority, such
as the National Electrical Code (NEC), ANSI/NFPA70,
(U.S.A.); the Canadian Electrical Code, CSA C22.2; the
Australian Code AG601; or other applicable regulations.
A fused disconnect switch or a main circuit breaker
(customer furnished)
supply line for each oven; it is recommended that this
switch/ circuit breaker have lockout/tagout capability. The
electric supply connection must meet all national and
local electrical code requirements. Copper is the recommended material for the electrical supply conductors.
MUST be installed in the electric
IV. ELECTRIC SUPPLY FOR
ELECTRICALLY HEATED OVENS
Power requirements for electrically heated ovens are
usually 208 - 240VAC, 1-phase, 3-wire (2 ‘hot’, 1 ground),
although ovens built for export can have power requirements of 380VAC and 480VAC. (These ovens have a
4-wire system.) A 1.5″ (38mm) diameter cutout/hole in the
back of the machiney compartment provides access for
the electrical supply connections on 380V and 480V units.
208V and 240V units have a cord and plug. Using flexible
cable(s) for the electrical power supply conductors requires a 2″ (51mm) strain-relief fitting (not furnished) to
enable safe access to the terminal block from which oven
power is distributed.
The supply conductors must be of the size and
material (copper) recommended to provide the current required; (refer to the data plate for the ampere
specifications). The electric current rating for each
conductor supplying a PS520-Series Oven ranges
from a minimum of 17.3 amperes to a maximum of
39.9 amperes.
Typical specifications for each PS520-Series Oven are
208V or 240V, 1-phase, 3-wire, 8.3kW; this oven requires
50-ampere service. A PS520-Series Double Oven (Figure
1-2) installation would require two 50-ampere service
connections, one for each oven; the 8.3kW power consumption also doubles for such an installation to 16.6kW.
The 208V or 240VAC electrically heated oven uses two
legs of the supplied power to provide 208V or 240VAC
power for the oven control circuitry.
Figure 2-11. Junction Connection BoxFigure 2-10. Typical Electric Oven Data Plate
13
SECTION 2
INSTALLATION
NOTES
14
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