Blodgett S1820 Operation Manual

IMPORTANT

WARNING: IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE
PROPERTY DAMAGE, INJURY OR DEATH. READ THE
INSTALLATION, OPERATING AND MAINTENANCE IN­STRUCTIONS THOROUGHLY BEFORE INSTALLING OR
SERVICING THIS EQUIPMENT

FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors
or liquids in the vicinity of this or any other appliance.

The information contained in this manual is important for the proper
installation, use, and maintenance of this oven. Adherence to these
procedures and instructions will result in satisfactory baking results
and long, trouble free service. Please read thismanual carefully and
retain it for future reference.

Errors: Descriptive, typographic or pictorial errors are subject to

correction. Specifications are subject to change without notice.

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THE REPUTATION YOU CAN COUNT ON

For over a century and a half, The Blodgett Oven Company has been building
ovens and nothing but ovens. We’ve set the industry’s quality standard for all
kinds of ovens for every foodservice operation regardless of size, application
or budget. In fact, no one offers more models, sizes, and oven applications than
Blodgett; gas and electric, full-size, half-size, countertop and deck, con­vection, Cook’n Hold, Combi-Ovens and the industry’s highest quality Pizza
Oven line. For more information on the full line of Blodgett ovens contact your
Blodgett representative.

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iv

TABLE OF CONTENTS

SECTION 1

I. MODEL IDENTIFICATION .............................................. 1

S1820 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

S1820 OVEN INSTALLATION

REQUIRED KITS AND EQUIPMENT .......................... 8

PARTS LIST FOR SERIES S1820 ELECTRIC OVEN

INSTALLATION KIT .................................................... 8

UTILITY ROUGH-IN DIMENSIONS AND POSITIONING

FOR S1820 OVENS .................................................. 12

CIRCUIT BREAKER ..................................................... 12

ELECTRICAL SPECIFICATIONS ................................. 12

ELECTRICAL RATING ................................................. 12

SUPPLY WIRE .............................................................. 12

SUGGESTED ................................................................ 12

II. VENTILATION GUIDELINES ....................................... 1 2

III. ELECTRICAL CONNECTION INFORMATION FOR

S1820 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 .......................................................... 24

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 ................................................. 30

E. Conveyor Reassembly Into Oven .......................... 31

F. Checking Conveyor Belt Tension ........................... 31

G. Conveyor Belt Link Removal ................................. 32

H. Attaching Drive Chain ............................................. 33

III. MAINTENANCE - EVERY 3 MONTHS ......................... 35

A. Electrical Terminals ................................................ 35

B. Ventilation ................................................................ 35

IV. MAINTENANCE - EVERY 6 MONTHS ........................ 35

S1820 ELECTRIC OVEN KEY SPARE PARTS ............ 36

KEY SPARE PARTS KIT ............................................... 36

SECTION 5 TROUBLESHOOTING

Troubleshooting Charts ................................................... 37

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, S1820 ................... 51

Wiring Diagram, E380-480V 50/60/1, S1820 ................... 52

Wiring Diagram, E230-240V CE S1820 ........................... 53

Wiring Diagram, E380-400V CE S1820 ........................... 54

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.

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NOTES

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SECTION 1

DESCRIPTION

I. MODEL IDENTIFICATION

The Blodgett S1820 may be used either as a single oven
or stacked for use as double or triple ovens.

A single Blodgett S1820 Oven (Figure 1-1) is mounted on
a base pad with legs. A double oven (Figure 1-2) consists
of two,
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.

stacked,

single ovens. A triple oven (Figure 1-3)

SECTION 1

DESCRIPTION

Figure 1-1. Single S1820 Oven

Figure 1-2. Double S1820 Oven

Figure 1-3. Triple S1820 Oven

1

SECTION 1
DESCRIPTION

S1820 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.

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 ×

S1820 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

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II. COMPONENT FUNCTION (Figure 1-4)

SECTION 1

DESCRIPTION

Figure 1-4. S1820 Oven Components Locations

3

SECTION 1
DESCRIPTION

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.

D. Cooling Fan — See Figure 1-5 and Figure 1-6

Blower Assembly

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

Figure 1-7. Air Finger Componebts.

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 Blodgett S1820 Oven is shipped partially assembled.
It will arrive in a carton on a crate.

Carton size for a 1820S 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 55310 OWNER'S OPERATING & INSTALLATION MANUAL

PARTS LIST FOR 1820S ELECTRIC OVEN

INSTALLATION KIT

Single and Double Stack Ovens

P/N 55311

PARTS LIST FOR S1820 ELECTRIC OVEN

INSTALLATION KIT

Triple Stack Oven

P/N 55312

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 55310 OWNER'S OPERATING & INSTALLATION MANUAL

Figure 2-1. S1820 Electric Oven Installation Parts

8

SECTION 2

INSTALLATION

Figure 2-5. MODEL S1820 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 S1820 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 S1820 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.

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SECTION 2
INSTALLATION

UTILITY ROUGH-IN DIMENSIONS AND POSITIONING

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

FOR S1820 OVENS

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 S1820 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 required for
the Blodgett S1820 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.

12

SECTION 2

INSTALLATION

III. ELECTRICAL CONNECTION

INFORMATION FOR S1820 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 S1820 Oven ranges from a
minimum of 17.3 amperes to a maximum of 39.9
amperes.

Typical specifications for each S1820 Oven are 208V or
240V, 1-phase, 3-wire, 8.3kW; this oven requires 50­ampere service. An 1820S 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.

13

Figure 2-11. Junction Connection BoxFigure 2-10. Typical Electric Oven Data Plate