Blodgett S1828G Installation Manual

S1828G

CONVEYOR OVEN

INSTALLATION – OPERATION – MAINTENANCE

BLODGETT OVEN COMPANY

50 Lakeside Avenue, Box 586, Burlington, Vermont 05402 USA Telephone: [phone] Fax: [phone]

WWW.BLODGETT.COM

PN 63937 (08/09) Rev. B

G.S. Blodgett Corporation

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 ammable 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 this manual carefully and
retain it for future reference.

Errors: Descriptive, typographic or pictorial errors are subject to

correction. Specications are subject to change without notice.

ii

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.

iii

iv

TABLE OF CONTENTS

Page
SECTION 1

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

SERIES S1828G GAS SPECIFICATIONS ...........................2

II. COMPONENT FUNCTION .............................................4

A. Conveyor Motor and Conveyor Belt ........................4

B. Blower Fan .................................................................4

C. Gas Burner .................................................................4

D. Cooling Fan ................................................................4

E. Air Fingers and Blank Plates - See Figure 1-9 ........4

SECTION 2

I. UNLOADING ....................................................................8

PARTS LIST FOR SERIES S1828G GAS OVEN

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

UTILITY ROUGH-IN DIMENSIONS AND POSITIONING

FOR S1828G-SERIES OVENS ...................................13

CIRCUIT BREAKER .......................................................13

ELECTRICAL SPECIFICATIONS ...................................13

ELECTRICAL RATING ...................................................13

SUPPLY WIRE ................................................................13

SUGGESTED ..................................................................13

II. VENTILATION GUIDELINES .........................................13

III. ELECTRICAL CONNECTION INFORMATION FOR

S1828G-SERIES OVENS. ..........................................14

IV. ELECTRIC SUPPLY FOR GAS HEATED OVENS .......14

V. GAS SUPPLY ................................................................15

SECTION 3 INSTALLATION

I. CONTROL FUNCTIONS .................................................17

II. COMPONENT INFORMATION AND LOCATION .........18

A. Door Safety Switch ..................................................18

B. Blower Switch ..........................................................18

C. Heat/Conveyor Switch .............................................18

D. Temperature Controller ............................................18

E. Conveyor .................................................................19

MEASURING CONVEYOR SPEED. ..............................19

TABLE OF CONTENTS

(Continued)

Page

III. STEP-BY-STEP OPERATION .........................................20

A. Startup Procedures ..................................................20

Daily Startup ..................................................................20

Power Failure .................................................................20

B. Shutdown Procedure ..............................................20

IV. NORMAL OPERATION - STEP-BY-STEP ................... 22

A. Daily Startup Procedure ........................................... 22

B. Daily Shutdown Procedure .................................... 22

V. QUICK REFERENCE: TROUBLESHOOTING ............ 24

SECTION 4 MAINTENANCE

I. MAINTENANCE - DAILY ............................................. 26

A. Exterior ...................................................................... 26

B. Cooling Fan .............................................................. 26

C. Conveyor Belt ......................................................... 26

D. Crumb Pans ............................................................. 26

II. MAINTENANCE - MONTHLY ....................................... 27

A. Removing Conveyor From Oven For Cleaning .... 27

B. Air Fingers Disassembly For Cleaning .................. 29

C. Reassembly of Air Fingers ...................................... 30

D. Reinstall End Plugs ................................................. 33

E. Conveyor Reassembly Into Oven ........................... 34

F. Checking Conveyor Belt Tension............................ 34

G. Conveyor Belt Link Removal .................................. 35

H. Attaching Drive Chain ............................................. 36

III. MAINTENANCE - EVERY 3 MONTHS ......................... 37

A. Electrical Terminals ................................................. 37

B. Ventilation ................................................................. 37

IV. MAINTENANCE - EVERY 6 MONTHS .........................37

S1828G-SERIES GAS OVEN KEY SPARE

PARTS ...................................................................... 38

KEY SPARE PARTS KIT ................................................ 38

SECTION 5 TROUBLESHOOTING

Troubleshooting Charts ...................................................... 39

SECTION 6 ELECTRICAL SCHEMATICS

Wiring Diagram, G208-240V 50/60 GO, S1828G ............. 41

NOTE

Wiring Diagrams are in Section 6 of this Manual.

The diagram for each oven is also on the lower

inner surface of its Control Console.

v

NOTES

vi

SECTION 1

DESCRIPTION

I. MODEL IDENTIFICATION

The Blodgett S1828G-Series may be used either as
a single oven or stacked for use as double or triple
ovens.

A single S1828G-Series Oven (Figure 1-1) is mounted
on a base pad with legs. A double oven (Figure 1-2)
consists of two, stacked, single ovens. The lower oven
is mounted on a base pad with legs. A triple oven (Figure
1-3) consists of three stacked single ovens. The lower
oven is mounted on a base pad with stacking pins.

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.

SeCTION 1

DeSCRIPTION

Figure 1-1. Single S1828G Oven

Figure 1-2. Double S1828G Oven

Figure 1-3. Triple S1828G Oven

1

SeCTION 1
DeSCRIPTION

S1828G SERIES OVEN SPECIFICATIONS

Conveyor Belt Width 18.00" (457mm)
Heating Zone Length 28.00" (711mm)
Baking Area Square Feet 3.5 sq. ft. (0.33 sq. m.)
Overall Dimension

Standard Single Oven w/Legs 50.00" (1270mm) L ×

40.75" (1035mm) W ×

21.72" (786mm) H ×
Overall Dimension

Double Oven 50.00" (1270mm) L ×

40.75" (1035mm) W ×

37.27" (947mm) H x
Overall Dimension

Triple Oven 50.00" (1270mm) L x

40.75" (1035mm) W ×

52.82" (1342mm) H ×
Weight of Single Oven 250 lb (93.3kg)
Shipping Weight 325 lb (121.3kg)
Shipping Cube 22.1 ft3 (0.62 m3)
BTU's - Natural or Propane Gas 50,000 BTU/hr
Gas Input - Natural or Propane Gas 1/2" NPT
Maximum Operating Temperature 600°F (316°C)
Warm-up Time 20 min.
Belt Speed Limits 1-10 minutes

SERIES S1828G ELECTRICAL SPECIFICATIONS

Main Blower Control Circuit Phase Frequency Amperage Poles Wires

Voltage Voltage Draw

208-240v 208-240v 1 Ph 50/60 Hz 2.0 Amp 2 Pole 3 Wire

(2 hot, 1 grd)

GAS ORIFICE AND PRESSURE SPECIFICATIONS (PER OVEN CAVITY) - DOMESTIC AND STANDARD ExPORT OVENS

GasType MainOriceI.D. Supply(Inlet)Pressure Pressure

Natural #42 drill (.094")(2.38mm) 6-8” W.C. (14.9-19.9mbar) * 3.5” W.C. (8.72mbar)
Propane #48 drill (.076")(1.93mm) 6-8” W.C. (14.9-19.9mbar) * 3.5” W.C. (8.72mbar)

* The gas supply pressures and orice sizes shown are for ovens installed in North America. The required gas supply pressures and orice sizes

of ovens installed in other locations are dependent on the local gas type and on all applicable local codes.

GAS ORIFICE AND PRESSURE SPECIFICATIONS (PER OVEN CAVITY) - CE OVENS

Supply (Inlet) Pressure

IT,PT,ES,SE,
Main UK,CH,IT,AT, SE,CH,AT,DK, BE,IE,IT,PT, Orice Rated
Gas Orice DK,FI DE BE,FR FI,DE,NL ES,UK (Manifold) Heat

Type dia.
G20 2.3749 20 20 20 -- -- 11.21 22.36

mm mbar mbar mbar mbar kW-hr.
G25 2.3749 -- -- -- -- -- 16.19 22.36

mm mbar kW-hr.
G30 1.3970 -- -- -- 29 or 50 28-30, 37 26.2 22.59

mm mbar or 50 mbar mbar kW-hr.

I2H

I

2e

I

2e+

I

3B/P

I3+ Pressure Input

Orice(Manifold)

NOTE

Wiring Diagrams are contained in Section 6 of this Manual

and are also located inside the oven at the

bottom of the Control Panel.

Additional electrical information is provided on the oven's serial plate.

This Manual Must Be Kept For Future Reference.

2

II. COMPONeNT FUNCTION (Figure 1-4)

SeCTION 1

DeSCRIPTION

Figure 1-4. S1828G-Series 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 1 minutes to 10 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 ngers.

The BLOWeR switch must be set to “ON” or “I” for oven
warmup and baking.

C. Gas Burner

The gas burner is located inside the rear panel and is
controlled 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 cover-
ing 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.

Left Control Box

Figure 1-5. Machinery Compartment

Components

4

SeCTION 1

DeSCRIPTION

Figure 1-6. Cooling Fan

5

SeCTION 1
DeSCRIPTION

F2. Blank Plates

1. Blank Plates- The Blank Plates are available to install

on the plenum where an air nger is not required.

Figure 1-7. Blank Plate and an Air Finger.

6

SeCTION 2

SECTION 2

INSTALLATION

INSTALLATION

WARNING - For gas ovens, after any conversions, readjustments, or service work on the oven:

• Perform a gas leak test.

• Test for correct air supply.

• Test for proper combustion and gas supply.

• Check that the ventilation system is in operation.

WARNING

Keep the appliance area free and clear of combustibles.

WARNING

The oven must be installed on an even (level) non-ammable ooring and any adjacent walls must be

non-ammable. Recommended minimum clearances are specied in the Descriptionsection of this

Manual.

WARNING

Do not obstruct the ow of combustion and ventilation air to and from your oven. There must be no

obstructions around or underneath the oven. Constructional changes to the area where the oven is

installed shall not affect the air supply to the oven.

CAUTION

For additional installation information, contact your local Authorized Service Agent.

NOTE

There must be adequate clearance between the oven and combustible construction. Clearance must

also be provided for servicing and for proper operation.

NOTE

An electrical wiring diagram for the oven is located inside the machinery compartment.

NOTE

All aspects of the oven installation, including placement, utility connections, and ventilation requirements,

must conform with any applicable local, national, or international codes. These codes supersede the

requirements and guidelines provided in this manual.

NOTE

In the USA, the oven installation must conform with local codes. In the absence of local codes, gas

oven installations must conform with the National Fuel Gas Code, ANSI Z223.1. Installed ovens 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

In Canada, the oven installation must conform with local codes. In the absence of local codes, gas oven

installations must conform with the Natural Gas Installation Code, CAN/CGA-B149.1, or the Propane

Gas Installation Code, CAN/CGA-B149.2, as applicable. Installed ovens must be electrically grounded in

accordance with local codes, or in the absence of local codes, with the Canadian Electrical Code CSA C22.2.

NOTE

In Australia, the oven installation must conform with any requirements of the appropriate statutory authority.

Gas oven installtions must conform with AGA Codes AG311 and AG601.

NOTE

In CE countries, all aspects of the gas supply connection must comply with current IEC/CEE requirements and

with all applicable local, national, and international codes.

7

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 con-

struction. 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 ow of ventilation air to and

from your oven. Do not obstruct the fan holes in
the rear of the unit.

I. UNLOADING

Your Blodgett S1828G-Series Oven is shipped partially
assembled. It will arrive in a carton on a crate.

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 le 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.

PARTS LIST FOR SERIES S1828G GAS OVEN

INSTALLATION KIT

Single Stack Oven

ITEM

NO. QTY PART NO. DESCRIPTION
1 4 3101908 LeG 4″ AD FT

2 1 62208 INSULATION BOTTOM TRAY
3 1 62206 BOTTOM TRAY WeLDMeNT
4 1 61650 TOP COveR
5 4 51387 SCReW MSSLT THReAD 8-32 × 1/2, 18-8
7 1 22450-0228 GAS HOSe ReSTRAINT CABLe
8 1 22361-0001 GAS HOSe
9 1 49975 CORD & PLUG NeMA L6-20P
10 1 23115-0009 MANUAL GAS vALve, 3/4″ × 1/2, COUPLeR

11 1 31823 REDUCER, 3/4″ – 1/2″

12 4 62207 INSULATION

9

P/N 63946

7

10

11

8

Figure 2-1. S1828G-Series Gas Oven Installation Parts

8

PARTS LIST FOR SERIES S1828G Gas OVEN

INSTALLATION KIT – Double Stack Oven P/N 63947

ITEM NO. QTY PART NO. DESCRIPTION

1 2 62208 INSULATION BOTTOM TRAY
2 1 62206 BOTTOM TRAY WeLDMeNT
3 1 61650 TOP COveR
4 4 51387 SCReW MSSLT THReAD 8-32 × 1/2, 18-8
5 4 3101908 LeG 4″ AD FT
7 1 22450-0228 GAS HOSe ReSTRAINT CABLe
8 2 22361-0001 GAS HOSe
9 1 49975 CORD & PLUG NeMA L6-20P
10 1 23115-0009 MANUAL GAS vALve, 3/4″ × 1/2, COUPLeR

11 1 31823 ReDUCeR, 3/4″ – 1/2″

12 1 59227 HeAT GUARD
13 4 62207 INSULATION

SeCTION 2

INSTALLATION

9

12

8

PARTS LIST FOR SERIES S1828G Gas OVEN

INSTALLATION KIT – Triple Stack Oven P/N 63948

ITEM NO. QTY PART NO. DESCRIPTION

1 2 62208 INSULATION BOTTOM TRAY
2 1 62206 BOTTOM TRAY WeLDMeNT
3 1 61650 TOP COveR
4 4 51387 SCReW MSSLT THReAD 8-32 × 1/2, 18-8
5 4 M3828 PIN, ALIGNMeNT
7 1 22450-0228 GAS HOSe ReSTRAINT CABLe
8 3 22361-0001 GAS HOSe
9 1 49975 CORD & PLUG NeMA L6-20P
10 1 23115-0009 MANUAL GAS vALve, 3/4″ × 1/2, COUPLeR
11 1 31823 ReDUCeR, 3/4″ – 1/2″
12 2 59227 HeAT GUARD

13 4 62207 INSULATION

9

7

10

11

7

10

11

12

8

Figure 2-1 (continued). S1828G-Series Gas Oven Installation Parts

9

SeCTION 2
INSTALLATION

1

Figure 2-5. MODEL S1828G SINGLE OVEN DIMENSIONS

FRONT

REAR

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 2-6. MODEL S1828G DOUBLE OVEN DIMENSIONS

1

2

59227

The Opening Height is Adjustable from 2-1/4 inch mini-

1

mum to 3-3/4 inch maximum in 1/2 inch increments.

2

P/N 59227 is shown in its correct installed position.

11

SeCTION 2
INSTALLATION

Figure 2-7. MODEL S1828G TRIPLE OVEN DIMENSIONS

1

2

59227

2

59227

The Opening Height is Adjustable from 2-1/4 inch mini-

1

mum to 3-3/4 inch maximum in 1/2 inch increments.

2

P/N 59227 is shown in its correct installed position.

12

UTILITY ROUGH-IN DIMENSIONS AND POSITIONING

FOR S1828G-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

SeCTION 2

INSTALLATION

CIRCUIT BREAKER

Separate circuit breaker with lockout/tagout electrical
shutoff for each oven. Wire each oven separately.

15A Amp circuit breaker for 208-240v.

ELECTRICAL SPECIFICATIONS
DOMESTIC: 208v main blower motors, 1 Ph, 1.5 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 or ExPORT: 240v main blower motors, 1

Ph, 1.5 Amp draw, 50/60 Hz, 208-240v control circuit, 2
pole, 3 wire system per oven (2 hot, 1 grd).

230v main blower motors, 1 Ph, 1.5 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.
A 6 foot cord with a NeMA L6-20 plug is supplied on

Domestic units.

POWER RATING

50,000 BTU/hr (14.7 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.

Figure 2-9. Typical S1828G-Series Oven(s)

Installation

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
S1828 Series Blodgett conveyorized gas 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’ Chan-

nels and “Heat Guards” for “Double and Triple Ovens”
that must be installed in the eld.

Please Note: There is now one heat guard on double

units and two heat guards on triple units. See

Figure 2-7.

These ‘C’ Channel brackets are installed in the vertical
plane using existing screws 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 oven by
keeping the oven away from the rear wall.

13

SeCTION 2
INSTALLATION

III. ELECTRICAL CONNECTION INFORMATION

FOR S1828G-SERIES OVENS.

WARNING

Authorized supplier personnel normally accom­plish the connections for the ventilation system,
electric and gas supplies, 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) MUST be installed in the electric 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.

IV. ELECTRIC SUPPLY FOR GAS HEATED

OVENS

Power requirements for gas heated ovens are 208 ­240vAC, 1-phase, 3-wire (2 ‘hot’, 1 ground). electrical
connection is made through a cord and plug. Using ex­ible cable(s) for the electrical power supply conductors
requires a 2″ (51mm) strain-relief tting (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 specications).

The electric current rating for each conductor supplying
a S1828G-Series Oven is 1.5A.

Figure 2-10. Typical Gas Oven Data Plate

eLeCTRICAL

INLeT

GAS INLeT

eLeCTRICAL

INLeT

Figure 2-11. Junction Connection Box

HeAT

GUARD

14

SeCTION 2

INSTALLATION

V. GAS SUPPLY

CAUTION

DURING PRESSURE TESTING NOTE THE FOLLOWING:

1. The oven and its individual shutoff valve must be disconnected
from the gas supply piping system during any pressure testing
of that system at test pressure in excess of 1/2 psi (3.45 kPa).

2. The oven must be isolated from the gas supply piping system
by closing its individual manual shutoff valve during any pressure
testing of the gas supply piping system at test pressure equal
to or less than 1/2 psi (3.45 kPa).

3. If incoming pressure is over 14″ W.C. (35mbar), a separate
regulator MUST be installed in the line BEFORE the individual
shutoff valve for the oven.

WARNING:To prevent damage to the control valve regulator
during initial turn- on of gas, it is very important to open the
manual shutoff valve very slowly.

After the initial gas turn-on, the manual shutoff valve must remain
open except during pressure testing as outlined in the above

steps or when necessary during service maintenance.

A. Gas Utility Rough-In Recommendations

The following gas system specifications are STRONGLY
ReCOMMeNDeD. Deviating from these recommendations may
affect the baking performance of the oven.

Gas Meter - 650 cfh (307

Gas Line

• DEDICATED LINE from the gas meter to the oven

• 1-1/2" (38.1mm) pipe for natural gas

• 1-1/2″ (38.1mm) pipe for propane

• Maximum length: 200' (61m). Each 90° elbow equals 7'

(2.13m) of pipe.

B. Gas Conversion

Where permitted by local and national codes, it is possible to
convert ovens from natural to propane gas, or from propane to
natural gas. Use the appropriate Middleby Gas Conversion Kit

for the specic oven model.

/min) meter

pressure tap of gas control concerned, to measure burner
pressure (measuring point must be as near to burner as
possible).

3. Make sure that the appliance is in operation and the Mo­duplus® coil is energized with maximum current.

4. If maximum rate pressure needs adjustment, use an 8
mm wrench to turn adjustment screw for maximum pres­sure setting (clockwise to increase or counter-clockwise
to decrease pressure), until the desired maximum outlet
pressure is obtained.

5. Disconnect electrical connection of the Moduplus®.

6. Check minimum pressure setting and readjust if neces­sary. (See Adjusting Minimum Pressure Setting for proper
adjusting procedure.)

7. Reconnect pressure feedback connection (if applicable).

8. If minimum and maximum pressures are set, wire the
Moduplus® in circuit.

9. Close pressure tap screw.

E. Adjusting the Minimum Pressure Setting

1. Disconnect pressure feedback connection (if applica­ble).

2. Connect a suitable pressure gauge to pipe line or to outlet
pressure tap of gas control concerned, to measure burner
pressure (measuring point must be as near to burner as
possible).

3. Disconnect electrical connection of the Moduplus®.

4. energize operator, set control in operation and wait until
an outlet pressure is recorded on pressure gauge.

5. If minimum rate pressure needs adjustment, use an 8
mm wrench to turn adjustment screw for minimum pres­sure setting (clockwise to increase or counter-clockwise
to decrease pressure), until the desired minimum outlet
pressure is obtained.

6. Check if main burner lights easily and reliable at minimum
pressure.

7. Reconnect pressure feedback connection (if applicable).

8. Close pressure tap screw.

CAUTION:

The terms of the oven’s warranty require all start-

ups, conversions and service work to be performed
by a Middleby Authorized Service Agent.

C. PS1828 Propane Conversion

Two items have to be changed, to change the oven to LP:

1. Replace main orices.

2. Adjust main gas regulator per instructions below.
Disconnect the manifold union closest to the main burner, and

remove the manifold assembly (four screws). Slide out the mani­fold assembly (leaving the ignition and sense wires connected).

Replace the main orices.

Replace the main orices on the manifold assemblies with the

LP units, and replace the manifold assembly. Reconnect the
union.

D. Adjusting the Maximum Pressure Setting

1. Disconnect pressure feedback connection (if applicable).

2. Connect a suitable pressure gauge to pipe line or to outlet

Figure 2-12 - Flexible Gas Hose Installation

1/2" gas

pipe nipple

1/2" gas
line tee with
pressure tap

Gas Union

Connection

15

3/4"-1/2"
gas pipe

reducer

3/4" gas

pipe nipple

90°

elbow

Flexible

Gas Hose

To Gas
Supply

Pipe

Full-Flow

Gas

Shutoff

valve

Individual gas

connection

for each oven

cavity

SeCTION 2
INSTALLATION

Figure 2-13. Gas Burner Assembly

Gas Burner

Manifold Pressure Tap

Figure 2-14. Burner Assembly

Main Orices

Gas Burner
Assembly

Manifold Pressure Tap

Gas valve

Figure 2-15. Gas Valve

Adjustment Screw (5 mm)

for minimum pressure

setting

F. Checkout

After any adjustment, set appliance in operation and observe
through a component cycle to ensure that burner system com­ponents function correctly.

Adjustment Screw

(8 mm) for maximum

pressure

setting

G. Maintenance

It is recommended to check yearly the minimum and the
maximum setting and readjust them if necessary.

H. Connection

WARNING

Some procedures in this section may require con-

versions, readjustments, or service on the oven's
gas system. Before performing these procedures,

=

check that the main gas supply valve and the circuit
breaker/fused disconnect are in the OFF ("O") position.
After completing these procedures, perform a gas leak
test before operating the oven.

CAUTION

The terms of the oven's warranty require all start-ups, conver­sions and service work to be performed by a Middleby Mar­shall Authorized Service Agent. The installation, start-up and
changes required when changing from one gas type to another
can be performed ONLY by a certied professional.

NOTE: Certain safety code requirements exist for the installation
of gas ovens; refer to the beginning of Section 2 for a list of
the installation standards. In addition:

• In the USA, the installation must conform with local codes,
or in the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.1.

• In Canada, the installation must conform with local codes,
or in the absence of local codes, with the Natural Gas
Installation Code, CAN/CGA-B 149.1, or the Propane
Installation Code, CAN/CGA-B 149.2, as applicable.

• In Australia, the installation must conform with AGA Codes
AG311 and AG601, and with any requirements of the
appropriate statutory authority.

• In CE countries, the gas supply connection should be
according to eN-203 (gas appliance directive) and to
applicable ISO 228-1 or ISO 7-1 recommendations. All
aspects of the gas supply connection must comply with
current IeC/Cee requirements and with all applicable
local, national, and international codes.

• For all ovens equipped with casters, the gas line connection
shall be made with:

- A connector that complies with the Standard for

Connectors for Movable Gas Appliances, ANSI Z21.69
(in USA), or Connectors for Movable Gas Appliances,
CAN/CGA-6.16 (in Canada).

Check the oven’s gas supply requirements to determine the
type of gas to be used with the oven. If the gas type required
does NOT match the local supply:

• For North American installations, a conversion kit is
supplied with the oven to allow operation using propane
gas. Refer to Part B, Gas Conversion, in this section.

• For CE ovens, directions for converting the oven for use

with other gases are described in Part D.1, Preparation
for Use with various Gases, in this section.

16

If the installation will use the supplied gas hose, be sure that the

1/2" to 3/4" gas line tting is attached. Refer to the instructions

in the gas hose package. One gas line connection method is
shown in Figure 2-12; however, compliance with the applicable
standards and regulations is mandatory.

Inlet and regulated gas pressures can be measured using
a “U” tube manometer at the tap locations shown in Figures
2-12 and 2-13.

1. Checking the Gas Supply (Inlet) Pressure
a. With the main gas supply valve closed and the circuit

breaker/fused disconnect in the OFF ("O") position, open
the inlet pressure tap shown in Figure 2-16 and attach a
manometer to the tap.

b. Depress the safety switches to allow the oven to

operate.

c. Open the main gas supply valve. Switch the circuit breaker/

fused disconnect to the ON ("I") position.

d. Start the oven according the directions in the Operation

section of this Manual. Adjust the temperature controller

to the maximum setting (316°C).

e. Measure the supply (inlet) pressure.
f. Switch the oven off. Close the main gas supply valve,

and switch the circuit breaker/fused disconnect to the OFF
("O") position. Remove the manometer, and close the inlet
tap.

g. Compare the measured supply (inlet) pressure to the

nominal pressures shown in Table 1-5 (in the Description
section of this Manual).

If the supply pressure is lower or higher than the nominal
pressure, the reason should be investigated and the gas
supplier contacted.

For natural gas ovens, if the measured supply pressure is lower
than 0.247psi, or higher than 0.363psi, contact the gas supplier.
DO NOT OPeRATe THe OveN or adjust the oven controls.

SeCTION 2

INSTALLATION

17

SeCTION 2
INSTALLATION

NOTES

18

I. CONTROL FUNCTIONS

SECTION 3

OPERATION

SECTION 3

OPERATION

Figure 3-1. S1828G-Series Oven Control Functions

WARNING

A possibility of injury from rotating parts and
electric shock exists in this oven.
Never disassemble or clean the oven with the
BLOWER switch or any other oven control
turned “ON” or “I”. Turn “OFF” or “O” and lockout
or tagout all electric power to the oven before
attempting to clean or service this oven.

19

SECTION 3
OPERATION

II. COMPONENT INFORMATION AND

LOCATION (Figures 3-1 and 3-2)

A. Door Safety Switch

The Door Safety Switch is located at the lower right side
of control panel opening. Opening the control panel door
permits this switch to open, disconnecting power to all
electrical controls.

CAUTION

Do NOT touch the wires going to this safety
switch. Current is always present.

B. Blower/Heater Switch

The “Blower/Heater Switch” has two positions. The
switch must be “ON” or “I” for the main blowers to come
on and permit the oven to run. The fan circulates the air
throughout the oven and must stay on during baking and
during the cool down cycle above 200°F (93°C) to prevent

blower bearing damage. To protect the blower motor and
bearings a thermostatic override is built into the oven. If
the temperature inside the oven is over 180°F (82°C) the
main blower will continue to run after the “Blower/Heater
Switch” is turned to the “OFF” or “O” position.

C. Conveyor Switch

The “Conveyor Switch” allows the burner to activate
and the belt will start moving. Temperature activation is
determined by the settings on the Digital Temperature
Controller.

The on-off switch for the conveyor motor is on the con­trol panel. Also on the control panel is the digital con­veyor speed control. The digital control can be adjusted
from 1-10 min. bake time (conveyor speed).
Refer to Figure 3-3.

Conveyor speed is measured by the amount of time it
takes for an item to go through the bake chamber of the
oven.

D. Temperature Controller

Figure 3-2. Interior View of Control Console

20

The temperature controller is a solid-state, PID type to
maintain the operator-set temperature. The temperature
controller continuously monitors the oven temperature and
turns on the modulating gas valve. The heat is on for the
time required to maintain a constant oven temperature.

The temperature controller contains a low-limit switch
which allows the oven to cool down to 200°F (93°C)
before shutting off the blower. A high-limit indication
(ALM 1) will appear on the display if the oven reaches
650°F (343°C).

MEASURING CONVEYOR SPEED.

SECTION 3

OPERATION

See Figures 3-4 and 3-5.

To check conveyor speed, place a product item at the
entrance end of baking chamber as shown. Time how
long it takes for the leading edge of the item to go from
the entrance end of the baking chamber to the exit end.
This should be the conveyor speed shown on the con­veyor speed digital control.

NOTE: In Figures 3-4 and 3-5, the oven shown is with
the conveyor running right to left.

WARNING

Possibility of injury from rotating parts and
electrical shock exist in this oven.

Never disassemble or clean the oven with the
blower switch or any other part of the oven
turned “ON” or “I”. Turn “OFF” or “O” and lock­out or tagout all electrical power to the oven
before attempting to clean or service
this oven.

Figure 3-3. Conveyor Speed Digital Control

Figure 3-4. Product at entrance end of baking

chamber – BEGINNING OF TIMING

21

Figure 3-5. Product at exit end of baking

chamber – END OF TIMING

SECTION 3
OPERATION

WARNING

OVENMUSTBEKEPTCLEAROF

COMBUSTIBLESATALLTIMES.

III. STEP-BY-STEP OPERATION

A. Startup Procedures
Daily Startup

1. Turn the BLOWER/HEATER switch (Figure 3-6) to
the “ON” or “I” position. This starts the main blower fan
and the cooling fans. The blower circulates air through

the air ngers and must stay on during the cooking or

baking process.

2. Check to see if the cooling fans (see Figure 1-8) are
operating when the blower switch (see Figure 3-6) is turned
“ON” or “I”. The cooling fans cool the control components
and blower motor. The cooling fans, located at the rear
of the oven blows air into and through the cabinet. Air is
exhausted through the front of the cabinet and also out
the front of the oven. Refer to Daily Maintenance Section
for fan intake checking procedure.

3. Turn the CONVEYOR switch (Figure 3-6) to the “ON”
or “I” position, after the Temperature Control displays
the current temperature. This starts the conveyor belt
moving through the oven. Set the conveyor speed for the
desired baking time. Refer to the following Procedures
E, F and G.

4. Set the temperature controller to the desired baking
temperature.

NOTE: For complete temperature controller operation
instructions refer to Step C.

5. Wait for the “Heat ON” light to turn on.

6. Oven will reach a baking temperature of 500°F (232°C)
in approximately 20 minutes. Allow the oven to cycle for
30 minutes after it has reached desired bake temperature.
The oven is now ready for baking.

Power Failure

In case of power failure, turn off all switches and remove
product. After power has been reestablished follow
normal startup procedure.

B. Shutdown Procedure

IMPORTANT NOTE

The cooling fan operates when the BLOWER/
HEATER switch is turned “ON” or “I”. It must
operate to keep the control console below
140°F (60°C).

1. Turn the BLOWER/HEATER switch to “OFF” or “O”.
NOTE: The blowers will remain on until the oven tem-

perature cools down to 200°F (93°C) at which time they
will stop automatically.

2. Make certain that there are no products left on the
conveyor inside the oven. Turn the CONVEYOR switch
to “OFF” or “O”.

22

SECTION 3

CONVEYOR

BLOWER/HEATER

OPERATION

Figure 3-6. Control Panel

23

SECTION 3

BLOWER/HEATER

BLOWER/HEATER

OPERATION

IV. NORMAL OPERATION - STEP-BY-STEP

A.Daily Startup Procedure

1. Check that the circuit breaker/fused disconnect is in the
on position.

2. Turn the "BLOWeR/
HeATeR" ( ) switch to

the “ON” ("I") position.

3. Adjust the temperature
controller to a desired
set temperature, if
necessary.

• Press the Set Point

and Unlock keys at
the same time. Wait
for the "SeT PT" light
to turn on.

• Press the Up Arrow

and Down Arrow
Keys as necessary to
adjust the set-point.

4. Turn the "CONveYOR"
( ) switch to the
"ON" ("I") position, and
wait for the "HeAT ON"
light to turn on.

+

or

wait

for

7. (Optional) Press the Tem­perature (

the Actual Temperature
in the display, and wait
for the "ACTUAL TeMP"
light to turn on. This allows
you to monitor the oven
temperature as it rises to
the setpoint.

8. Allow the oven to preheat for 10 minutes after it has reached
the set point temperature.

B. DAILY SHUTDOWN PROCEDURE

1. Turn the "BLOWeR/
HeATeR" ( ) switch to

the "OFF" ("O") position.
Note that the blowers will
remain in operation until the
oven has cooled to below

200°F (93°C).

2. Make certain that there
are no products left on
the conveyor inside
the oven. Turn the
"CONveYOR" ( )
switch to the "OFF" ("O")
position.

3. After the oven has cooled and the blowers have turned to
the “OFF” or “O” position, switch the circuit breaker/fuse
disconnect to the “OFF” or “O” position.

) key to show

wait

for

waitfor

Temperature

Displaybefore

wait

for

turingswitchto

“ON”position.

5. If necessary, adjust the
conveyor speed setting
by pressing the or

pushbuttons on the
conveyor speed controller
to change the displayed
bake time.

6. Wait for the oven to heat to the setpoint temperature.
Higher setpoint temperatures will require a longer wait.

The oven can reach a temperature of 500°F (232°C) in

approximately 15 minutes.

or

IMPORTANT

On gas ovens, if the "HeAT ON" light will not illuminate,
OR if the oven does not heat, the gas burner may not
have lit. Turn the "CONveYOR" ( ) and "BLOWeR/
HeATeR" ( ) switches to the "OFF" ("O") position. Wait
for AT LeAST FIve MINUTeS before restarting the oven.
Then, repeat the Daily Startup procedure.

CAUTION

In case of power failure, turn all switches to the “OFF”
("O") position and remove the product. After the power
has been restored, perform the normal startup pro­cedure. IF THe OveN WAS SWITCHeD OFF FOR
LeSS THAN 5 MINUTeS, WAIT FOR AT LeAST FIve
MINUTeS BeFORe ReSTARTING THe OveN.

24

SECTION 3

OPERATION

"SP LOCK"

Light

Lights when the set

point is locked out
from changes. This
setting can only be

changed by service

personnel.

OVERTEMP

Light

Lights when the oven

temperature is greater

than 650°F (343°C).

Refer to Quick Refer-

ence: Troubleshoot-

ing in this section.

Display

Shows the Set Point

or the Actual Tem-

perature in degrees

Fahrenheit (F) or

Celsius (C).

"HEAT ON" Light

Lights when the

burner is in

operation.

"SET PT" (set-

point) Light

Lights when the set

point is shown in

the display.

"ACTUAL TEMP"

Light

Lights when the Actual
Temperature is shown

in the display.

Temperature Key

Press this key once

to view the Actual

Temperature in the

Display.

Press this key togeth-

er with the Set Point
Key to allow the Set

Point to be changed.

Changes can only be

made for 60 seconds.

Unlock Key

Up Arrow and Down

Arrow Keys

Press these keys to adjust

the Set Point up or down.

If the Set Point will not

change, refer to Set Point

Key and Unlock Key in this

section.

Service Key

Service use

only.

Set Point Key

Press this key togeth-

er with the Unlock Key

to allow the Set Point

to be changed.

Changes can only be

made for 60 seconds.

25

SECTION 3
OPERATION

V. QUICK REFERENCE: TROUBLESHOOTING

SYMPTOM PROBLeM SOLUTION

light is lit, food product is

undercooked

Oven will not

turn on at all

appears in display,

oven is not heating

Oven will not heat

The oven temperature ex-

ceeded 650°F (343°C), and

the burner was automatically
shut down.

electrical power may not
be reaching the oven, or
the controls may be set
incorrectly.

The oven did not reach

200° F (93°C) with in 15

minutes of startup, and the
oven has stopped heating.

Controls may be set
incorrectly.

• Follow the procedures under Daily Shutdown Procedures in this
section to shut down the oven. Contact your Blodgett Authorized
Service Agent to determine and correct the cause of the condition
to prevent damage to the oven.

• Check that the circuit breaker/fused disconnect is turned on.

• Check that the "BLOWER/HEATER" ( ) Switch is in the

“ON” ("I") position.

• Turn the "BLOWER/HEATER" ( ), and "CONveYOR"

( ) switches to the "OFF" ("O") position.

• Wait for AT LEAST FIVE MINUTES before restarting the oven.

• Repeat the Daily Startup procedure.

• Check that the Set Point is correctly set.

• Check that both the "BLOWER/HEATER" ( ) and "HeAT/

CONveYOR" ( ) Switches are in the “ON” ("I") position.

• If the oven still will not heat,turn the "BLOWER/HEATER"

(

), and "CONveYOR" ( ) switches to the "OFF" ("O")

position.

• Wait for AT LEAST FIVE MINUTES before restarting the oven.

• Repeat the Daily Startup procedure. Check that the Set Point
is above 200°F (93°C).

Oven is operating, but little

or no air is blowing from air

ngers

Conveyor moves with a
jerky motion, or will not

move at all

Food products are over-

cooked or under cooked.

Air ngers may have been

reassembled incorrectly
after cleaning.

Conveyor may be jammed
on an object in the oven, or
conveyor belt or drive chain
tension may be incorrect.

Controls may be set
incorrectly.

• Turn the oven to the “OFF” or “O” position, and allow it to cool.

Disconnect electrical power to the oven.

• Refer to Section 4, Maintenance, for instructions on reassembling

the air ngers.

• Turn the oven to the “OFF” or “O” position, and allow it to cool.

Disconnect electrical power to the oven.

• Check if the conveyor is blocked by an object inside the oven.

• Refer to Section 4, Maintenance, for instructions on checking

the conveyor and drive chain tension.

• Check that the set temperature and bake time settings are

correct.

IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL BLODGETT

AUTHORIZEDSERVICEAGENT.ASERVICEAGENCYDIRECTORYISSUPPLIEDWITHYOUROVEN.

26

SECTION 4

MAINTENANCE

SECTION 4

MAINTENANCE

WARNING

Before ANY cleaning or servicing of the oven, perform the following procedure:

1. Switch off the oven and allow it to cool. Do NOT service the oven while it is warm.

2. Turn the full-ow gas safety valve to the off position.

3. Turn off the electric supply circuit breaker(s) and disconnect the electric supply to the oven.

4. If it is necessary to move a gas oven for cleaning or servicing, disconnect the gas supply before moving the oven.
When all cleaning and servicing is complete:

1. If the oven was moved for servicing, return the oven to its
original location.

2. Reconnect the gas supply.

3. Reconnect the electrical supply.

WARNING

Possibility of injury from rotating parts and electrical
shock exist in this oven. Turn off and lockout or tagout
electrical supply to oven(s) before attempting to disas-

semble, clean or service oven(s). Never disassemble

or clean the oven with the blower switch or any other

part of the oven turned on.

WARNING

Before performing any maintenance work or cleaning,

turn main power switch off.

CAUTION

When cleaning do not use any abrasive cleaning

materials or water spray, wipe clean only. Never use a

water hose or pressurized steam cleaning equipment

when cleaning this oven.

4. Turn on the full-ow gas safety valve. Test the gas line

connections for leaks using approved leak test substances
or thick soap suds.

5. Turn on the electric supply circuit breaker(s).

6. Perform the normal startup procedure.

NOTICE

If the oven is to be removed from its installed location
for servicing, perform the following procedure:

1. Switch off the oven and allow it to cool. Do NOT
service the oven while it is warm.

2. Turn off main circuit breakers and disconnect con­nector from oven.

3. Move oven to desired location for servicing.

4. When servicing is complete, move oven to original
location.

5. Adjust legs to level oven.

6. Connect electrical connectors to oven.

7. Turn on main circuit breakers.

8. Follow normal startup instructions.

27

SECTION 4
MAINTENANCE

I. MAINTENANCE - DAILY

A. Exterior

Everyday you should clean the outside of the oven with
a soft cloth and mild detergent.

WARNING

Never use a water hose or pressurized
steam cleaning equipment when cleaning
the oven.

B. Cooling Fan

1. ONE COOLING FAN GRILLE AT THE REAR OF THE
OVEN MUST BE CLEANED DAILY - Clean grille with a
stiff nylon type brush.

2. Check the air intake of the cooling fan daily. The best
time to check is right after starting the oven.

IMPORTANT NOTE

D. Crumb Pans (Figure 4-2)

WARNING

Crumb pan is extremely hot while oven
is operating. Allow oven to cool before
removing crumb pan.

When the oven is cool remove and clean the crumb pan at
each end of the oven. Each crumb pan can be removed
by sliding it out, as shown in Figure 4-2. Reinstall the
crumb pans after cleaning.

The cooling fan operates when the blower switch
is turned to “ON” (“I”). It must operate to keep the
electrical control cabinet below 140°F (60°C).

WARNING

IF FAN BLADE IS NOT ROTATING, BROKEN,
OR FAN ASSEMBLY IS MISSING FROM MAIN
BLOWER MOTOR SHAFT, DO NOT OPERATE
OVEN

. REPLACE COOLING FAN BLADE
BEFORE OPERATING OVEN. Serious damage
could be done to the burner blower motor and/
or solid-state electrical components if oven is
operated while cooling fan is not running or vent
grille is plugged.

3. Using a stiff nylon brush clean control compartment
vent grille.

C. Conveyor Belt (Figure 4-2)

Everyday, just after starting the oven, stand at the un­loading end of the conveyor, and with a brush, remove
food particles (crumbs, etc.) clinging to the conveyor belt,
brushing them into the crumb pan.

Figure 4-1. Oven Cooling Fans

Figure 4-2. Conveyor Belt and

Crumb Pan Cleaning

28

SECTION 4

MAINTENANCE

II. MAINTENANCE - MONTHLY

NOTE: The oven interior may require cleaning
more
than once a month depending on the volume of baking.
To clean the interior, you have to disassemble some
parts of the oven.

When cleaning your Series S1828G Oven note the
following:

PRECAUTIONS-

1. Do not use excessive water or saturation of oven
insulation will occur.

2. Do not use a caustic oven cleaner or the aluminized

nger manifold surfaces will be severely damaged.

When cleaning your oven, rst remove all heavy debris

with a vacuum cleaner. Use a damp cloth for light clean­ing. For heavier cleaning of baked on grease and carbon
deposits use a non-caustic cleaner that will not react with

the aluminized nger manifold surfaces.

You can order non-caustic cleaner from your local
authorized Blodgett Parts Distributor in the quantities
listed below:

Part # Quantity
27170-0244 Case of Quarts (6)
27170-0246 Case of Gallons (4)

A. Removing Conveyor From Oven For Cleaning

1. Remove entry and exit trays.

2. Loosen (do not remove) two screws on housing
guard.

3. Remove motor housing guard.

4. Lift conveyor and remove chain.

5. Lift other side of conveyor and push toward other
side.

Figure 4-3.

29

SECTION 4
MAINTENANCE

6. Remove conveyor as shown.

Figure 4-4.

Figure 4-5.

Figure 4-6.

Figure 4-7.

CAUTION

Be careful not to bump the drive sprocket

while handling the conveyor, to avoid

damaging the drive shaft.

30

B. Air Fingers Disassembly For Cleaning

T1 T2 T3
B1 B2 B3

1. As the air ngers are removed use a felt pen to mark
all parts of the ngers. This includes the nger manifold,

inner plate and the outer plate (refer to Figure 1-9). If a
blank or choke plate is used, mark that plate also. Fingers
are marked in the order shown; as viewed from the front
of the oven. (The marks for an upper oven should be
preceded with a “U”, example UB1, UT2, etc.)

Standard Fingers

SECTION 4

MAINTENANCE

2. Slide blank plates straight out.

Figure 4-8.

3. Remove air ngers.

NOTE: Some oven users require a custom nger arrange-

ment where the quantity of air ngers may vary.

Figure 4-9.

4. With air ngers out, place them in an upright position

to remove the outer plate.

5. Gently step on the lip of the nger and pull the outer

plate off.

You can remove top and bottom ngers and blank

plates from each or either end. It is highly recommended

that each nger be marked before removing so it is

placed in exactly the same position when reassembled
(refer to step 1).

Remove the air ngers, pull the nger at the back side

- pull straight out.

Figure 4-10.

31

SECTION 4
MAINTENANCE

6. To remove the inner plate, pull the plate out and then up.

Figure 4-11.

7. The outer nger plate is stainless and may be cleaned

by either soaking in a hot, strong detergent solution or
using a caustic cleaner. The conveyor belt can also be
cleaned in the same way.

C. Reassembly of Air Fingers

1. Air ngers are made up of one inner plate, one outer

plate and the nger housing manifold. Be sure to match

up the markings (T1, T2, T3, etc.) on all the parts of the

air ngers as you are reassembling.

Figure 4-14.

2. Reassemble the inner plate. Keep your ngers clear
so you won’t pinch them. The inner plate of a nger will

only go in one way because of its design.

Figure 4-12. Standard Lower Finger

3. Replace the outer plate by placing your hands at on
the top of the plate and pushing down. Keep your ngers

clear so you won’t pinch them.

Figure 4-15.

Figure 4-13. Standard Upper Finger

32

4. Replace the air ngers by pushing in at the back side.

Remember to replace them according to the numbers
marked on them when they were removed. They must
go back in the same way they came out.

IMPORTANT: When inserting ngers the tab on

the outer plate must be in the groove as shown
in Figure 4-18. There is a blocking tab on the
outside of the groove which will prevent inserting

the nger in the groove if the outer plate is moved
away from the ange of the nger manifold.

SECTION 4

MAINTENANCE

Figure 4-16.

Extended Lip

Flange of
Finger Manifold

Tab on
Outer Plate

Tab on
Outer Plate

Figure 4-17.

33

SECTION 4
MAINTENANCE

5. Install ngers and blank plates correctly with edges

interlocked and no space between edges.

Top Finger

Tab on Outer Plate of Finger
Located in Groove

Top Finger

Incorrect - Too
Much Space

Blank Plate

Incorrect - Too
Much Space

Blank Plate

Tab on Outer Plate of Finger
Located in Groove

Top Finger

Tab on Outer Plate of Finger
Located in Groove

Correct - Edges
Overlap Com­pletely

Blank Plate

Figure 4-18.

34

D. Reinstall End Plugs

1. Reinstall lower end plug. Be sure to tighten the wing
screw on the end plug.

2. Reinstall conveyor.

3. Reinstall upper end plug. Be sure to tighten two wing
screws on the end plug.

SECTION 4

MAINTENANCE

Figure 4-19.

Figure 4-20.

35

SECTION 4

Middleby

Marshall

Conveyor Extension

MAINTENANCE

E. Conveyor Reassembly Into Oven

1. Lift conveyor and position it in oven as shown.
NOTE: Conveyor may be inserted into either end of oven.

If it is to be installed from the non-drive end of the oven
the drive sprocket assembly must be removed as shown
in conveyor disassembly section.

Figure 4-21.

2. Reinstall the conveyor extension.

F. Checking Conveyor Belt Tension

WARNING

Oven conveyor belt must be cool when adjusting
belt. Do not adjust belt if HOT.

1. With the conveyor assembly in the oven, stand at one
end of conveyor and check tension by lifting the conveyor
belt at the center of the oven chamber opening. The belt
should not lift higher that 3″ to 4″ (75mm to 102mm).

2. Adjust conveyor belt tension screws (located on left
end of oven) for the 3″ to 4″ (75mm to 102mm) deec­tion, as shown in Figure 4-23. If there is proper tension,
proceed directly to “H. Attaching Drive Chain”. If belt is
still loose, continue to step 3 below.

3. If conveyor belt is still not under proper tension, an
entire link must be removed. Use the following procedure
“G. Conveyor Belt Link Removal” to remove a link. If
conveyor belt is under proper tension, proceed directly
to “H. Attaching Drive Chain”.

Figure 4-22.

Figure 4-23.

36

SECTION 4

MAINTENANCE

G. Conveyor Belt Link Removal

1. Using long nose pliers, an entire link can be removed
with the conveyor assembly either in or out of the oven.
Position master links at end of conveyor as shown in
Figure 4-24.

Master
Links

Figure 4-24.

4. Unhook the link to be removed.

5. Pull up on the belt link section and remove. Do not
discard the link removed as it may be used for making
spare master links.

NOTE: If a section of the conveyor belt is being replaced
it should be done now. Remove the links that need re­placing and use the section of conveyor belt furnished
in your installation kit to replace them.

2. Using long nose pliers, unhook master links at left
end of conveyor as shown in Figure 4-25.

Figure 4-25.

3. Remove the outside master links on the right and left
sides of the conveyor belt as shown in Figure 4-26.

Figure 4-27.

NOTE: Before connecting the inside master links, notice

that these links have a correct position (Figure 4-28). The
link at the right is in the correct (horns up) position for
inserting into the conveyor belt. The horns facing down

Correct
Position

Incorrect
Position

are in the incorrect position.

Figure 4-28.

Figure 4-26.

37

SECTION 4
MAINTENANCE

6. Reconnect the inside master links (Figure 4-29.)

Figure 4-29.

NOTE: The outside master links have right and left sides

to them. The right edge master link has an open hook
facing you as shown in Figure 4-30. This will match up
with the outer edges of the conveyor belt. Remember
this hook travels backwards on the conveyor.

Direction of travel

H. Attaching Drive Chain

1. If drive sprocket assembly was removed reassemble

it into the conveyor drive shaft. Be sure at on end of

drive shaft aligns with set screw in conveyor shaft collar.
Once in place tighten 3/32″ set screw.

2. Lift conveyor and install drive chain to conveyor drive
sprocket and motor sprocket.

Figure 4-30.

7. Reconnect the outside master links.

8. Replace all parts removed from the oven.

Figure 4-32.

3. The angle plate located on the underside of the con­veyor must be against the lower end plug. This is true
on both sides of oven.

Crumb Pan

Mounting

Bracket

Lower End Plug

Figure 4-33.

Figure 4-31.

38

SECTION 4

MAINTENANCE

4. Reattach conveyor guard to control panel and secure
two screws.

Install both upper end plugs.

Figure 4-34.

A. Electrical Terminals

Open the control cabinet door by removing the three
screws from the control cabinet door. Tighten all
electrical control terminal screws including the electrical
contactor and speed control terminal screws as shown
in Figure 4-35.

Contactor

Speed

Control

III. MAINTENANCE - EVERY 3 MONTHS

WARNING

Shut OFF all electrical power and lock/tag out
the switch before attempting maintenance work.

NOTE: It is recommended that the 3-month
maintenance be performed by an authorized Blodgett
technician.

Figure 4-35.

B. Ventilation

Check that the air circulation throughout the oven is not
blocked and is working properly.

IV. MAINTENANCE - EVERY 6 MONTHS

A. Check brushes on D.C. conveyor motor, when worn
to less than 1/8″ (2.4mm), replace the brushes.

B. Check your oven venting system.
C. Inspect and clean the burner nozzle and the spark

electrode assembly.

IMPORTANT NOTICES:

• Installation of replacement parts requiring access

to the interior of the oven is permitted only by an
authorized service technician.

• If there are any problems with the operation of

the oven, the authorized service technician must
be called.

• It is suggested to obtain a service contract with a

manufacturer’s authorized service technician.

39

SECTION 4
MAINTENANCE

KEY SPARE PARTS KIT

An oven can be purchased with a Key Spare Parts Kit
(Figure 4-36). (The kit can be purchased when the oven
is ordered, or later, from a Blodgett Authorized Parts
Distributor). The kit contains many of the crucial parts
that can reduce serious downtime and loss of production,

S1828G-SERIES GAS OVEN KEY SPARE PARTS KIT (Figure 4-36)

ITEM PART NO. ENGLISH DESCRIPTION QUANTITY

1 28041-0011 Contactor, DP 25A 208/240V 1
2 58390 Motor, Conveyor Drive w/Magnet 1

3 60671 Board, Amplier Signal, 0-15VDC 1

4 32108 XFMR, 240V PRI 24V 65VA SEC 1
5 33812-5 Thermocouple, Type “J” Shielded 2.50 x 120 3
6 33813 Filter, RFI 1
7 38185 Assembly, Pickup Sensor 1
8 41872 Transformer, 240V (P), 24V (S) 25VA 1
9 44696 Switch, Rotary and Mounting Adapter 2
10 44697 Block, Contact 3
11 45644 Breaker, Circuit 240V 1A 1

12 48455 Ignitor, Single Rod 1
13 61602 Ignition, Spark Module 24VAC 50/60 Hz 1
14 62044 Switch, Air .08″ WC 1
15 50794 Relay, 240VAC 2P1S 1
16 47321 Control, Combo 4-20MA, Burst 1
17 58323 Controller, Digital w/o Dip Switch 1
18 60679 Valve, Gas PS528 1
19 36451 Fan, Cooling 230VAC 295 CFM 1

20 62282 Ignition Cable, 25″ 1
21 59002 Inshot Burner 2
22 62106 Main Blower 2

if a failure occurs.
Replacement parts for this kit can be purchased from

your Blodgett Authorized Parts Distributor.

2

8

14

5

20

1

9

16

3 4

10

17

11

18

7

6

13

19

21

15

12

22

Figure 4-36.

40

SECTION 5

TROUBLESHOOTING

SECTION 5

TROUBLESHOOTING

PROBLEM:

PRODUCTS ARE OVERCOOKED

OR UNDERCOOKED

Check for correct

setting of conveyor

speed control.

Set the conveyor speed

control at correct setting.

Verify the food prepa-

ration process.

If products still cook incorrectly,

call your Blodgett Service Agency.

Check for correct

setting on tempera-

ture controller.

Turn temperature

control to correct

setting.

PROBLEM:

OVEN BLOWER AND CONVEYOR OPERATE,

YET THE OVEN IS NOT HEATING

Reset the temperature controller to a

new setting (above 200°F), after turning

the BLOWER/HEATER switch to off for

30 seconds.

Start the oven again. If the oven still does not

heat, call your Blodgett Service Agency.

PROBLEM:

CONVEYOR WILL NOT HOLD PROPER SPEED

OR WILL NOT RUN AT ALL

Check whether the conveyor is
jammed on something in oven.

PROBLEM:

OVEN DOES NOT HEAT

Check to see if both BLOWER/HEAT-

ER switch and CONVEYOR switch

are in the “ON” or “I” position.

If oven does not heat, call your

Blodgett Service Agency.

PROBLEM:

BLOWER MOTOR IS RUNNING, YET LITTLE

OR NO AIR BLOWS FROM AIR FINGERS

Air ngers reassembled incorrectly,

after cleaning.

Assemble air ngers correctly, after cleaning.

Refer to Section 4 procedure, or call your

Blodgett Service Agency.

Check for proper tension of conveyor drive

chain and conveyor belt. Refer to Section 4 for

correct procedure.

Check that the conveyor

drive sprocket is tight.

If conveyor still does not run correctly, contact

your Blodgett Service Agency.

PROBLEM:

OVEN DOES NOT TURN ON WHEN ITS

SWITCHES ARE TURNED ON

Check that all electric supply switches are set to

the “ON” or “I” position. Then, start the oven.

If oven still will not start, contact your Blodgett

Service Agency.

41

SECTION 5
TROUBLESHOOTING

NOTES

42

ELECTRICAL SCHEMATICS

SECTION 6

ELECTRICAL SCHEMATICS

SECTION 6

43

Wiring Diagram, G208-240 50/60 GO, S1828G • P/N 62317 REV B

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.

NOTICE

During the warranty period, ALL parts replacement and servicing should be performed
by your Blodgett Authorized Service Agent. Service that is performed by parties other

than your Blodgett Authorized Service Agent may void your warranty.

NOTICE

Using any parts other than genuine Blodgett factory manufactured parts relieves the

manufacturer of all warranty and liability.

NOTICE

Blodgett reserves the right to change specications at any time.

Blodgett is proud to support the Commercial Food equipment
Service Association (CFeSA). We recognize and applaud
CFeSA's ongoing efforts to improve the quality of technical
service in the industry.

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • [phone] • FAX [phone]

www.middleby.com