Marshall Amplification AUTOBROIL 2424 User manual

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Rv101105
Copyright© 2005 Marshall Air Systems, Inc.
All Rights Reserved.
1
THIS MANUAL APPLIES TO BROILERS WITH S/N 3284 FORWARD
MODEL: 2424 121224 AUTOBROIL™
TABLE OF CONTENTS
I. BROILER SETTINGS ..................................................................................................... .......................1
II. EQUIPMENT INSTALLATION ........................................................................................ .......................2
Pre-Installation.......................................................................................................... .......................2
Equipment Location .................................................................................................. .......................2
Electrical Information ................................................................................................ .......................2
III. OPERATING INSTRUCTIONS ....................................................................................... .......................3
Pre-Operation Check ................................................................................................ .......................3
Broiler Adjustment .................................................................................................... .......................3
Toaster Operating Instructions ................................................................................. ................... 3-4
Toaster Shut-Off Instructions.................................................................................... .......................4
Toaster Conveyor Speed.......................................................................................... .......................4
Operation of 6-Button Controller............................................................................... ................. 5-11
IV. SCHEDULED MAINTENANCE....................................................................................... .....................12
Daily Cleaning Procedures ....................................................................................... ............... 12-13
Monthly Cleaning Procedures................................................................................... .....................13
Quarterly Cleaning Procedures and Preventive Maintenance.................................. ............... 13-14
V. TROUBLE SHOOTING ................................................................................................... ............... 14-18
VI. ASSEMBLY & DISASSEMBLY INSTRUCTIONS........................................................... ............... 18-19
VII. REPLACEMENT PARTS ................................................................................................ ............... 19-21
ILLUSTRATIONS
Overall Dimensions...................................................................................................……….. .......... Figure 1
Exploded View - Removable Parts ........................................................................... ....................... Figure 2
Exploded View - Internal Parts ................................................................................. ....................... Figure 3
Exploded View - Drive System ................................................................................. ....................... Figure 4
Drive System Detail .................................................................................................. ..................... Figure 4A
Control Panel With 6-Button Control......................................................................... ....................... Figure 5
Conveyor Axle Scraper............................................................................................. ....................... Figure 6
Spark Guard Installation…………………………………………………………………. ........................ Figure 7
Broiler Arm Extension 2424 ...................................................................................... ........................ Figure 8
Broiler Arm Extension 121224 .................................................................................. ........................ Figure 9
Broiler Idler Shaft Asby ............................................................................................. ...................... Figure 10
Toaster Platen Asby LH............................................................................................ ...................... Figure 11
Toaster Platen Asby RH ........................................................................................... ...................... Figure 12
Speed Control Circuit Board ..................................................................................... ...................... Figure 13
Fuse Location ........................................................................................................... ..................... Figure 14
Toaster Platen Heat Control ..................................................................................... ..................... Figure 15
Element Locations .................................................................................................... ..................... Figure 16
Wiring Schematic 121224……………………...(208V, 3PH, 60 AMP w/6-Button Control) Drawing #145703
Control Panel Quick Guide……………………………………………………...........................Drawing #145747

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Rv101105
Copyright© 2005 Marshall Air Systems, Inc.
All Rights Reserved.
2

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Issued111104
Copyright© 2004 Marshall Air Systems, Inc.
All Rights Reserved.
1
I. BROILER SETTINGS
AUTOBROIL™
MODEL: 2424 121224
MODEL NUMBER:____________________________________________________________
SERIAL NUMBER: ____________________________________________________________
ELECTRICAL SUPPLY: _________________________________________________________
SCHEMATIC NUMBER___________________ REV. _________
TOASTER PLATEN TEMPERATURE SETTING (425°F IS FACTORY SETTING)_______________
MENU SETTINGS: TEMPERATURE
RECIPE KEY SPEED TOP BOTTOM
1 ______________ _______ _______
2 ______________ _______ _______
3 ______________ _______ _______
4 ______________ _______ _______
5 ______________ _______ _______
6 ______________ _______ _______
START-UP TECHNICIAN: __________________________________________________________
START-UP DATE: ________________________________________________________________
COMMENTS: ____________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________
_____________________________________________________________________________

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Issued111104
Copyright© 2004 Marshall Air Systems, Inc.
All Rights Reserved.
2
II. EQUIPMENT INSTALLATION
PRE-INSTALLATION
1. After uncrating the Autobroil™unit, inspect for shipping damage. Check that the controller, switches, and
components are intact on the electrical cabinet front. Set the Autobroil™in place and use the plastic bag
to protect it from the debris and trash of building construction. Check that sideskins have not been dented
or damaged by the carrier. If damaged, notify your freight carrier immediately to file a concealed damage
claim, following the instructions attached to the outside of the shipping crate. Your warranty will not cover
freight damage.
2. Because this unit is required to be power fan exhausted, it is necessary to provide adequate make up air
equal to the amount of air removed. In addition to this, any other exhausts, flues, or air removal systems
must be taken into consideration. Examples of this are heat removal fans or hot water heater flues.
EQUIPMENT LOCATION
1. Position Autobroil™to properly align with exhaust hood. Check name plate for clearance requirements.
2. The hood/ventilator for the catering equipment should be located in accordance with the National Fire
Protection Association Standard #96, "Removal of Smoke and Grease-Laden Vapors from Commercial
Cooking Equipment" and any local applicable requirements.
3. For proper installation, the minimum clearance from combustible construction is 6" (152mm) from sides
and 6" (152mm) from back.
4. Adequate clearance should be maintained to allow easy access to loading and unloading areas of the
machine.
5. For servicing, unit must be moved 2' (610mm) clear from all construction.
ELECTRICAL INFORMATION
1. The Electrical Schematic is inside the electrical cabinet, and a copy is also included at the back of this
manual. Make certain the supply voltage and number of supply conductors agrees with the Electrical
Schematic. The load-carrying conductors should be sized according to the loads shown on the Electrical
Schematic per local codes and the National Electrical Code, ANSI/NFPA 70 -Latest Edition. If the broiler
is supplied with a cord, it will be type 4/4 or 6/4 SO 90 DEG C or higher, L1, L2, L3 and ground (See
electrical schematic for proper cord size). The cord will be approximately 9 feet long.
2. On a new electrical service - MAKE CERTAIN THAT VOLTAGE IS WITHIN 10% OF THE UNIT'S
RATED VOLTAGE. Appliance should be protected by a properly-sized circuit breaker furnished from the
main building circuit panel.
3. There is an Electrical Schematic located in the back of this Owner's Manual and also inside the
electrical cabinet of the machine.

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Issued111104
Copyright© 2004 Marshall Air Systems, Inc.
All Rights Reserved.
3
III. OPERATING INSTRUCTIONS
PRE-OPERATION CHECK (START-UP)
Before operating your Autobroil™, make a quick check of critical items as follows:
1. Check that no "binding" and resultant conveyor overloading is present. With the electrical
connections complete and with the electrical cabinet door secured shut, turn the broiler "ON" and run
the conveyors. Adjust the speed control for mid-point speed. The conveyor should move forward in
smooth unaltered motion. Shut down immediately if there is any evidence of "binding" or other
mechanical blockage.
2. Proper conveyor operation is when the amperage draw in the white or black motor lead from the
circuit board (Figure 4) to the motor cord measures .15 DC amps or less. To check amperage the
cabinet door will need to be open. THIS PROCEDURE SHOULD ONLY BE PERFORMED BY A
QUALIFIED ELECTRICIAN.
3. The Autobroil™was tested at the factory before shipping so excessive amperage will indicate
conveyor binding caused by shipping damage. Remove the roller chain (Figure 4) driving the
conveyor in question and move the conveyor by hand. Loosen the sprockets (Figure 4) that drive the
various axles and reposition them by 1/32" (1mm) until the conveyor tightness is eliminated. Twenty-
five inch pounds of torque is required to drive a properly set up conveyor.
4. After the conveyor checkout is complete, turn on the heat switch. All heater elements should glow
red. After the unit is up to temperature, these two elements will cycle. For trouble shooting problems,
see Section V. CAUTION: NEVER RUN HEAT WITHOUT CONVEYOR ON AS THIS CAN WARP
THE CHAIN.
5. Before first use, and after any special cleaning, it is necessary to "season" the BROILER chain. This
is done by bringing the broiler chain to operating temperature and applying liquid shortening from a
saturated cloth over the full width of the broiler chain while the chain makes five or six complete
revolutions.
6. Check to see that the three heat reflectors (Figure 3) are in place.
BROILER ADJUSTMENT
The Autobroil™requires 30 minutes to reach stable temperature. After this time lapse, the conveyor speed
can be set to properly cook the product. The control will display “READY” when the broiler reaches cooking
temperature.
TOASTER OPERATING INSTRUCTIONS
1. The temperature control is located behind the right side lift-off cover. The control is factory-preset for
425ºF (218ºC).
2. Adjust the bun platen height over the conveyor so the platen touches the bun as it is moved under the
platen. To lower platen, turn the knob counter clockwise. To raise platen, turn the knob clockwise. This
produces a caramelized surface. If the platen is adjusted too low, the bun will be crushed.

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Issued111104
Copyright© 2004 Marshall Air Systems, Inc.
All Rights Reserved.
4
TOASTER SHUT-OFF INSTRUCTIONS
1. The toaster section will continue to operate when the main heating (cooking) section of the broiler is on.
DURING A PROLONGED POWER FAILURE, NO ATTEMPT SHOULD BE MADE TO OPERATE THE
CATERING EQUIPMENT.
TOASTER CONVEYOR SPEED
1. The toaster conveyor is the lower conveyor on the broiler. This conveyor is linked to the main cooking
chamber broiler and does not have a separate speed control for the toasting section. For broilers without
computer controls, he toasting section is controlled by adjusting the toasting section temperature, using
the control located behind the right side lift-off cover.

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Issued111104
Copyright© 2004 Marshall Air Systems, Inc.
All Rights Reserved.
5
OPERATION OF 6-BUTTON CONTROLLER
1. USER INTERFACE
The following is the user interface layout. This control is located on the front of the broiler on the
right side.
The Control Panel illustration above shows a typical control interface layout. Also See Figure 5 for
Description of the Buttons. A Control Panel Quick Guide is located at the end of this manual.

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 RV050405
Copyright© 2005 Marshall Air Systems, Inc.
All Rights Reserved.
6
TIME AND DATE SETUP (USED ONLY ON BROILERS WITH FOOD PROBE OPTION)
When the controller is in Off mode, the system Time and Date can be adjusted by pressing the Off
Key for 10 seconds. The time is displayed on the 1st line, and the HH is blinking. Using the Up and
Down Keys, the hours are changed. Pressing the View Key moves the “focus” to the MM. Use the
Up/Down Keys to adjust. By pressing View Key again, HH:MM are replaced by DD/MM (or
MM/DD, depending on setting of temperature units) (1st line) and YY (2nd line). Use the View Key
to travel from one setting to another, and use the Up/Down Keys to modify. The View Key will
return to HH:MM. Pressing the Off Key again stores the new Time and Date, and returns to Off
mode.
ON/OFF KEYS
A normal press of this key turns on the controller. This causes the unit to start heating the
elements and running the motors at the slowest recipe speed found (overcooked food is safer
than undercooked food). This recipe is automatically selected (its corresponding LED lights up)
and the temperature set point is the one defined by this same recipe. At any time in On mode, the
user can change the selected recipe. When initially turned On, the unit will scroll PREHEAT on
the 1st line until the broiler comes up to temperature. After this time, unit will display either
READY, LOW, OR HIGH, depending on the current temperature readings.
A 3-second long press of the On/Off key turns off the unit. When the unit is turned Off, the Heater
Kill output is deactivated to disable power to heating elements. The 1st line will then blink HOT for
the Cool Down period (heating elements are off, but the conveyor motor is still running at the
fastest speed allowed by the unit). At that point, the unit will then simply display OFF, and all
outputs will be disabled.
RECIPE KEYS
Recipes are defined by a time and a temperature. The time basically sets the conveyor speed.
The top three (3) recipe buttons are for the left conveyor belt and the bottom three (3) buttons are
for the right conveyor belt.
When the unit is READY, a simple press of the recipe key will activate the selected recipe speed
and temperature (LOW and HIGH conditions may or may not be triggered).
When a specific recipe must be changed, keep its button pressed for 3 seconds, until the 1st
parameter name SET COOK TIME scrolls on the 1st line. The recipe as well as the Up/Down
LED’s will also blink indicating that they can be used. Pressing either Up or Down the 1st time
simply makes the display switch to the parameter’s value (preceded by an arrow, as in ►4.25 , to
indicate a changeable value). Subsequent presses will then modify the parameter. If Up or Down
is not pressed in 5 seconds, the display resumes scrolling the parameter name.
Each recipe has 3 programmable parameters. To switch from one to the next, press the recipe
key. After the last parameter is programmed, the unit resumes normal operation.
-SET COOK TIME,
-SET TOP TERMPERATURE,
-SET BOTTOM TEMPERATURE.
By default, all recipes are set as follows:
Cook time: 5.00

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Issued111104
Copyright© 2004 Marshall Air Systems, Inc.
All Rights Reserved.
7
Top temperature: 1325 ºF
Bottom temperature: 1250 ºF
VIEW KEY
The View key allows a user to view actual or programmed system parameters. Changes cannot
be made just by using this key.
In normal operation (On mode), pressing the View key will start scrolling the message BOTTOM
TEMPERATURE; also, the View and Up keys blink, indicating they can be used. If the broiler has
two conveyors, the down key also blinks. The 2nd line shows the current conveyor speed of the
illuminated recipe key. Pressing the Up key causes the 1st line to toggle between the message
and the actual temperature value. The down key will cycle to the recipe for the second conveyor.
A final press of the View key resumes normal operation.
When simply pressing the view key (not holding for 3 seconds), the 2nd line always shows the
current conveyor speed. If the unit is Off, or Hot, the conveyor speed is not shown.
A 3-second long press of the View key allows users to see the current recipe programs without
actually being able to change them. After this delay all 6 recipe LED’s blink, allowing the user to
select the wanted recipe. Once a recipe is selected, the procedure is the same for all recipes. The
1st parameter shows COOK TIME. By pressing the Up key, the user can view the value that is
currently programmed (but cannot change it). In 5 seconds the unit returns to the parameter
name. Pressing the Recipe key a 2nd time will bring up BOTTOM TEMPERATURE. Again, using
the Up key, the value can be seen. In 5 seconds, the unit returns to the parameter name.
Pressing the recipe key one last time returns the unit to normal operation.
CONVEYOR ONLY KEY
The Conveyor Only key is only accessible from the Off state. This key allows the conveyor to be
used without any heating. Press the Conveyor Only Key, then press the View Key. Press the Up
arrow to start the left conveyor moving. Do not run the conveyor faster than 230 on the display.
Press the Conveyor Only key to return to Off state. To start the other conveyor moving, press the
View button 2 times, then press the Up Arrow to the desired speed. This does not change the
programmed speed.
The parameter name SPEED is displayed on the 1st line. The current speed is displayed on the
2nd line (expressed as a time). The flashing triangle indicates the speed can be changed using
the Up and Down keys. Exit this mode by pressing Conveyor Only a 2nd time; however, the speed
selection is lost (i.e. the 1st speed used in READY mode is always the slowest recipe speed).
The display shows the theoretical motor shaft speed (divided by 100) on the top display, and the
real tachometer input (divided by 100) on the 2nd line. The theoretical value is simply derived
from the requested speed (in terms of time) and the programmed K value. The real value is
exactly that, the value coming in from the external tachometer. In an ideal world, the top and
bottom lines should read very close to the same value.
The next screen of data in the Conveyor Only mode is the real RPM coming in from the
tachometer input. By pressing the View key a 2nd time, this is displayed on the 1st line (which has
enough characters to display the information, as in the previous screen). A third and final press of
the View key returns to the standard Conveyor Only screen with SPEED on the 1st line.

OWNER’S MANUAL
2424, 121224 AUTOBROIL™
145861 Issued111104
Copyright© 2004 Marshall Air Systems, Inc.
All Rights Reserved.
8
RECORD/RECOVERY KEY
A recovery time is the time required for the temperature to go from 200°F to 800°F. A log exists
for each heater (top and bottom). This is useful for service and HACCP purposes.
Do not press the Recovery Key while in the conveyor only mode. This key is available anytime
the broiler is in normal operation. When pressed, the controller will list a log of the last 3 recovery
times.
When the Recovery Key is pressed, the controller will successively display TOP 1, TOP2, TOP 3,
BOT 1, BOT 2, AND BOT 3 recovery times, “1” being the most recent ramp logged. To actually
see the logged time, press the Up key. After the last set is seen (BOT 3), the unit resumes
normal operation.
FOOD PROBE KEY – THE FOOD PROBE IS OPTIONAL AND MAY NOT BE INSTALLED ON
ALL BROILERS
This key is useable only when the unit is On (and the Food probe is enabled in the Low-level
programming). It is accessible in 2 modes: automatic or manual. In manual mode, it is up to the
user to press the Food Probe key to initiate a log, whereas, the automatic mode will remind the
user (up to 6 times a day) to take a sample. Even in automatic mode, the user still has the
capability to log extra samples manually as he/she wishes.
To do a manual log, the user must first make sure the temperature probe is correctly connected,
and then press the Food Probe Key.
Step #1
This step prepares the controller for logging.
Display: SELECT RECIPE TO LOG is scrolled and recipe LED blink.
Sound: None.
User Action: Select the Recipe corresponding to the sample that will be probed.
Step #2
This step starts the logging as such, and gives the user time to set up for the sampling.
Display: Shows INSERT PROBE. Actual temperature can be seen when Up key is
pressed. The Up key and Record LED blink.
Sound: None.
User Action: Insert the Food Probe into the sample according to local sanitary codes and normal
restaurant procedures.
Step #3
In this step (basically a continuation of Step #2), the temperature continues to be displayed for the
user. Nothing is being logged yet. The user must wait until a certain temperature is reached (that
depends on what is being sampled (chicken, beef, etc.), as well as specific restaurant
procedures).
Display: The 1st line displays the temperature currently measured by the Food Probe. The
Record key LED also blinks.
Sound: No particular sound.
User Action: Keep Food Probe inserted. When temperature reaches a specific point (known to