Hobart HBA1E, HBA1G, HBA2G, HBA2E User Manual

O

P

E

HBA RACK OVEN
WITH ADVANCED ELECTRONIC
OVEN CONTROL

MODELS

R

A

T

I

O

N

HBA1G GAS
HBA2G GAS

HBA1E ELECTRIC
HBA2E ELECTRIC

FOR OVENS MANUFACTURED AFTER MARCH 2005

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

937 332-3000

www.hobartcorp.com

FORM 36801 (May 2005)

IMPORTANT FOR YOUR SAFETY

POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE
EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMATION CAN BE OBTAINED
FROM THE LOCAL GAS SUPPLIER.

IMPORTANT

IN THE EVENT A GAS ODOR IS DETECTED, SHUT DOWN
UNITS AT MAIN SHUTOFF VALVE AND CONTACT THE LOCAL
GAS COMPANY OR GAS SUPPLIER FOR SERVICE.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE
VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY
OTHER APPLIANCE.

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

IN THE EVENT OF A POWER FAILURE, DO NOT ATTEMPT TO
OPERATE THIS DEVICE.

KEEP AREA AROUND OVEN CLEAR OF COMBUSTIBLES. DO
NOT OBSTRUCT COMBUSTION AND VENTILATION OPENINGS
ON THE OVEN.

© HOBART, 2005

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MODEL HBA RACK OVEN

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TABLE OF CONTENTS

GENERAL ............................................................................................................................................ 5

INSTALLATION.................................................................................................................................... 5

OPERATION ........................................................................................................................................ 6

HBA Advanced Controls ................................................................................................................ 6

Auto On/Off Timer and Clock ................................................................................................. 8

Basic Operation ....................................................................................................................... 9

Cooling Oven ......................................................................................................................... 10

Operational Hints................................................................................................................... 10

Back-Up Control Operation (optional) ........................................................................................ 11

Safety Alarm................................................................................................................................. 11

Food Service Steam Mode .......................................................................................................... 12

Kosher Operation Mode (ovens equipped with Kosher Package) ............................................ 12

Programming the Oven ............................................................................................................... 13

Customized Operation ................................................................................................................. 17

Shutdown...................................................................................................................................... 19

Restarting Oven ........................................................................................................................... 19

Cleaning........................................................................................................................................ 20

MAINTENANCE ................................................................................................................................. 21

General ......................................................................................................................................... 21

Preventive Maintenance .............................................................................................................. 21

Service and Parts Information..................................................................................................... 21

TROUBLESHOOTING ....................................................................................................................... 22

Burners Will Not Light on Gas Oven........................................................................................... 22

Alarms and Display Messages .................................................................................................... 22

Other Troubleshooting Topics..................................................................................................... 22

OWNER PREVENTIVE MAINTENANCE PROCEDURE................................................................. 23

Introduction................................................................................................................................... 23

Preventive Maintenance Procedure............................................................................................ 23

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OPERATION AND CARE OF

MODEL HBA RACK OVEN

SAVE THESE INSTRUCTIONS

GENERAL

The Hobart HBA Rack Oven accommodates a roll-in rack. It is equipped with an electronic oven control
for baking and/or steaming applications. A mechanism in the oven ceiling rotates the rack during
baking.

Model HBA1G is rated at 180,000 Btu/hr, natural or propane gas.
Model HBA2G is rated at 300,000 Btu/hr or 350,000 Btu/hr, natural or propane gas.
Model HBA1E is rated at 34.2 kW.
Model HBA2E is rated at 51.3 kW.
Hobart Rack Ovens are produced with quality workmanship and material. Proper installation, usage

and maintenance of your oven will result in many years of satisfactory performance.
It is suggested that you thoroughly read this manual and carefully follow the instructions provided.

INSTALLATION

The Hobart HBA Rack Oven must be installed or moved only by authorized Hobart Bakery Systems
trained service technicians.

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HBA ADVANCED CONTROLS

OPERATION

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Control Guide - Advanced

Button Action Display

POWER

AUTO ON/OFF

TIMER

AUTO ON TIME

AUTO OFF TIME

TIMER ON/OFF

Press to turn the oven Control panel displays are lit when the oven is on. Oven
ON or OFF. defaults to Program 0. If oven is turned off and back on

within 2 minutes, the oven will come up in the last mode
and oven setting.

Press to enter current time The AUTO ON/OFF TIMER window displays the current
or time for oven to time, or the time the oven will automatically turn on or
automatically turn on or off.
off, when corresponding
Auto On Time or Auto
Off Time button is pressed.

Press to set the desired The AUTO ON/OFF TIMER window displays the time
time of oven to the oven will automatically turn on.
automatically turn ON.

Press to set the desired The AUTO ON/OFF TIMER window displays the time
time of oven to the oven will automatically turn off.
automatically turn OFF.

Press to turn the automatic The indicator light beside the timer ON/OFF button is
timer ON or OFF. lit when the function is enabled.

SET TEMP

BAKE TIMER

STEAM TIMER

AIRFLOW

DELAY

Press to set the desired The SET TEMP window displays the set temperature.
temperature The HEAT ON light is lit while the oven is heating. The
(5-degree increments). actual temperature in the oven cavity is displayed in the

OVEN TEMP window.

Press to enter The BAKE TIMER window displays the amount of time
the BAKE time for the current baking cycle. The minutes set are the
(1-minute increments). left two digits and minutes remaining are the right two

digits. The windows can be set to display hours and
minutes remaining. The ON light is lit when bake time
is active. See Customized Operation to configure this
setting.

Press to enter the The STEAM TIMER window displays the amount of
STEAM time time set for the steam cycle. The ON light is lit when
(5-second increments in the steam system is active.
Bakery mode; 1-second
increments in Food Service
mode).

Press to enter the The DELAY TIMER window displays the amount of
DELAY time time set for the circulation blower delay cycle.
(1-minute increments).

Press to start the The ON light blinks when the BAKE TIMER is active.
BAKE TIMER.

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Control Guide - Advanced (cont)

Button Action Display

Press to stop the BAKE The ON light is off when the BAKE TIMER is inactive.
TIMER or silence the
beeper after the BAKE
TIMER has timed out.

PROGRAM

STEP

Press to select bake The PROGRAM window displays the number of the
program. current program.

Press to select one of The corresponding indicator light will be lit (1 to 4),
four baking steps. depending on which step is selected.

Press to open or The indicator light above the VENT button is lit when the
close the vent. vent cycle is enabled.

Auto On/Off Timer and Clock

The Auto ON/OFF Timer display shows the current time of day. To set the clock, the control must be
turned on. Press and hold either arrow button to initiate clock setting, then adjust time using arrow
buttons. A few seconds after the time is adjusted, the colon in the time display will resume flashing.

Timer Settings

The oven can be set to turn itself on and off. After the AUTO ON/OFF TIMER is set, the POWER ON
OFF button can be pressed to turn the oven off. This will not disrupt the AUTO ON/OFF setting.
Electrical power to the oven must remain on.

hold

1. To set the oven to turn on, press and

the AUTO ON TIME button. The previously entered
start time will appear in the display. Use the UP and DOWN arrows to adjust the start time. Then
release the AUTO ON TIME button.

hold

2. To set the oven to turn off, press and

the AUTO OFF TIME button. The previously entered
end time will appear in the display. Use the UP and DOWN arrows to adjust the end time. Then
release the AUTO ON TIME button.

hold

3. To enable the automatic start, press and

the TIMER ON/OFF button until the indicator LED

to the right of the TIMER ON/OFF button is illuminated.

NOTE: When using AUTO ON/OFF to preheat the oven, if the oven is not disturbed for the time set
in parameter P17, it will revert to the Setback temperature stored in parameter P18 setup.

Backup Battery

The clock is backed up by a lithium battery which keeps the clock circuitry operating when all external
power is off. If the battery becomes low or dead while the external power is off, the display will read
12:00 (12 hr mode) or 0:00 (24 hr mode) and will not increment until a new time is set. The clock will
operate with a dead or missing battery, but must be set each time external power is turned on. Batteries
should be replaced when low or dead to avoid corrosive damage to the circuitry. Contact your local
Hobart Bakery Systems service office.

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Oven Preheat

For best results, the oven must be preheated to bake temperature before baking begins.

1. The door must be closed for oven to heat. The rack carrier will lift and rotate only during timed
bake.

NOTE: The rack carrier will be in the unload position from the last bake.

2. Press the POWER ON OFF button to turn the oven on.

3. Press the UP or DOWN arrows next to the SET TEMP window to enter the desired baking
temperature. Actual temperature of the oven will appear in the OVEN TEMP window.

4. Allow 50 minutes after the oven has reached the set temperature for the steam system to charge.

5. The oven is now ready for baking operations.

Basic Operation
WARNING: THE OVEN AND ITS PARTS ARE HOT. TO PREVENT BURNS, USE HOT PADS OR

PROTECTIVE MITTS WHEN LOADING OR UNLOADING THE OVEN.
WARNING: HOT AIR AND STEAM ARE RELEASED FROM THE OVEN INTERIOR WHEN THE

LOADING DOOR IS OPENED. TO AVOID BURNS, OPEN THE DOOR SLOWLY AND KEEP CLEAR
OF THE OPENING.

1. Preheat the oven. (See Oven Preheat) for HBA Advanced Controls.

2. Manually select baking settings:

• Press the UP or DOWN arrows next to BAKE TIMER to enter the desired value.

• Press the UP or DOWN arrows next to STEAM TIMER to enter the desired value.

• Press the UP arrow next to AIRFLOW DELAY to enter the desired value.

• The steam and airflow delay settings are optional and can be left at 0 if desired.

3. Slowly open the door and load product.

4. Close the door and press the START button. The ON light in the BAKE TIMER window blinks as
the timer counts down.

5. Rack lifts from floor and rotates clockwise.

6. The oven beeps after the BAKE TIMER times out. Press STOP to silence the beeper.

7. Open door. Allow rack carrier to stop and lower. Remove product

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Loading Procedure

1. Type B and C rack carriers are equipped with stops on both ends. For B lifts, ensure stop flap is
in the up position to load the rack on the rack carrier. For C lifts, push rack stop to the left after
rack is loaded.

2. Roll the rack into the oven so the end brackets channel onto the rack carrier. When using racks
equipped with pan stops, load racks so stops will prevent movement of trays toward user when
racks are unloaded.

3. Close the loading door. The rack carrier will lift and rotate only during timed bake.

Unloading Procedure

WARNING: THE OVEN AND ITS PARTS ARE HOT. TO PREVENT BURNS, USE HOT PADS OR

PROTECTIVE MITTS WHEN LOADING OR UNLOADING THE OVEN.

WARNING: HOT AIR AND STEAM ARE RELEASED FROM THE OVEN INTERIOR WHEN THE
LOADING DOOR IS OPENED. TO AVOID BURNS, OPEN THE DOOR SLOWLY AND KEEP CLEAR
OF THE OPENING.

1. Press STOP or open the loading door to silence the beeper.

2. Wait for the rack carrier to stop and lower.

3. For B lifts, push the rack stop down to unload the rack from the rack carrier. For C lifts, push rack
stop to the right to open.

4. Roll the rack from the rack carrier.

5. Close the loading door.

Cooling Oven

• To cool the oven more than 20 degrees below its current temperature; change SET TEMP to
the desired new temperature, open the oven door, and press VENT. The SET TEMP display will
alternate between ‘COOL’ and the SET TEMP until the oven has cooled. When the oven has
reached the set temperature, the alarm will beep and the control will return to normal operation.
Closing the oven door or pressing any control button during Cool-Down mode will also return
the control to normal operation.

• The VENT control can provide a means of cooling down the oven. When the oven is in the OFF
mode and the door is open, press the VENT button once to start or stop the circulation fan. Vent
light will be lit. The fan will also stop when the door is closed or the oven is put into the ON mode.

• If the oven temperature is more than 20 degrees higher than the set temperature, and the bake
timer is not activated, the oven will automatically open the VENT. The VENT will remain open
until the oven temperature is within 20 degrees of the set temperature.

Operational Hints

• On the initial startup, the oven temperature will default to the factory setting of 375°F (191°C)
unless changed.

• During a baking cycle, the START and STOP buttons control the BAKE, STEAM and AIRFLOW
DELAY settings

only. They have no effect on the oven heat. When the BAKE TIMER times out,

the oven heat stays at the set temperature. Care should be taken not to overbake products.

• To adjust the temperature during a baking cycle, press the UP or DOWN arrows in the Oven
Temp section to enter the new temperature.

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