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Hobart HO300G - page 1
701 S. RIDGE AVENUE TROY, OHIO 45374-0001 937 332-3000 www.hobartcorp.com FORM 36705 (Oct. 2005) MODELS HO300G AND HO300E MINI R O T A TING RA CK O VENS MODEL HO300E (ELECTRIC) ML-132177 HO300G (GAS) ML-132178 ...
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Hobart HO300G - page 2
– 2 – © HOBART, 2005 IMPOR T ANT FOR Y OUR SAFETY THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL GAS EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD START-UP AND ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL. POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE EVENT THE SMELL OF GAS IS DETECTED. THIS INF ...
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Hobart HO300G - page 3
– 3 – TABLE OF CONTENTS GENERAL ............................................................................................................................................. 4 INSTALLATION .................................................................................................................................... 4 Unpacking ............ ...
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Hobart HO300G - page 4
– 4 – OPERA TION AND CARE OF MODELS HO300G AND HO300E MINI R O T A TING RA CK O VENS KEEP THIS MANU AL FOR FUTURE USE GENERAL Models HO300G (Gas) and HO300E (Electric) Mini Rotating Rack Ovens feature the choice of two rack configurations: • Eight 18" x 26" (45.7 cm x 66 cm) pan capacity rack with 4" (10.2 cm) slide spacing • ...
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Hobart HO300G - page 5
– 5 – LOCATION The HO300G and HO300E Mini Rotating Rack Ovens must have the following minimum clearances to combustibles: • Back and sides: 0" • Bottom: 0" • Top: 18" (45.7 cm) NOTE: Minimum 24" clearance needed for service access on the right side. If right side is within 30" of radiant heat or grease vapor sourc ...
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Hobart HO300G - page 6
– 6 – GAS CONNECTIONS CAUTION: Gas supply connections and any pipe joint compound must be resistant to the action of propane gases. The HO300G is an indirect gas-fired oven, consisting of a heat exchanger with eight independent, U-shaped tubes, each with a separate in-shot burner rated at 11,875 BTU/hr for a total input of 95,000 BTU/hr. WARNIN ...
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Hobart HO300G - page 7
– 7 – DRAIN CONNECTIONS Connect a 1 / 2 " drain line to the 1 / 2 " NPT drain connection located at the rear of the oven. Route the drain line to a floor drain, allowing a minimum 1" air gap between the drain line outlet and floor drain. If oven is being installed on an HPC800 Proofing Cabinet, it is recommended that separate dra ...
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Hobart HO300G - page 8
– 8 – OPERA TION WARNING: THE MINI-RACK OVEN AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING, SERVICING OR CLEANING THE OVEN. CONTROLS ...
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Hobart HO300G - page 9
– 9 – Control Guide Button Action Display POWER 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. AUTO ON/OFF Press to enter current time The AUTO ON/OFF TIMER window displa ...
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Hobart HO300G - page 10
– 10 – Control Guide (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 Press the The PROGRAM window displays the number of the arrow keys to select current program. a bake program. STEP Use to enter bake programs. The c ...
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Hobart HO300G - page 11
– 11 – Auto ON/OFF Timer Setting Clock 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 of the arrow buttons until the colon between the hours and minutes display stops blinking. Use the up and down arrow buttons to adjust time of day. After 5 seconds of no use, the ...
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Hobart HO300G - page 12
– 12 – Oven Preheat For best results, the oven must be preheated to bake temperature before baking begins. 1 . Press the POWER ON OFF button to turn the oven O N. 2 . Press the UP or DOWN arrows in the TEMP section to enter the desired baking temperature. 3 . Confirm that the doors are closed. 4 . Allow 50 minutes after the oven has reached the ...
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Hobart HO300G - page 13
– 13 – Operational Hints • On the initial startup, the oven temperature will default to the factory setting of 375°F (191°C) unless changed using customized operations. • 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 time ...
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Hobart HO300G - page 14
– 14 – FOOD SERVICE STEAM MODE This mode can be used to provide steam on a periodic basis throughout operation. When this mode is enabled, the STEAM TIMER controls how many seconds of steam are provided to the oven, while a value entered in the Parameter 14 (P14) setup controls how frequently the steam is operated. To enable the Food Service St ...
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Hobart HO300G - page 15
– 15 – PROGRAMMING THE OVEN Single Step Programming The program menu stores up to 99 programs that can be recalled by number when needed. A program is a set of baking instructions (temperature, bake, steam and airflow delay settings) that the operator defines for any baking operation. 1 . With the oven in the OFF mode, press and hold the UP arr ...
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Hobart HO300G - page 16
– 16 – Multi-Step Programming Additional programs or steps can be entered within the original program number. Up to four individual steps can be added by the operator, each with different bake settings. For example, Program 1 has temperature, bake, steam and delay time settings set by the operator. This is known as Step 1. After the timer times ...
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Hobart HO300G - page 17
– 17 – Changing the Programs 1 . With the oven in the OFF mode, press and hold the UP arrow in the STEPS section. While pressing and holding the UP arrow, press the POWER ON button for 3 seconds. When the beep sounds, the oven is in program mode. 2 . Press the PROGRAM UP or DOWN arrows until the program number that is desired is displayed. 3 . ...
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Hobart HO300G - page 18
– 18 – USING THE PROGRAMS 1 . Press the PROGRAM UP or DOWN arrows to select the desired program number (1-99). The TEMP , BAKE, STEAM and AIRFLOW DELAY settings are displayed. 2 . Confirm that the oven is at the set baking temperature. 3 . Slowly open the doors. Wait for the rack to come to a stop. 4 . Load product into oven. 5 . Close the door ...
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Hobart HO300G - page 19
– 19 – CUSTOMIZED OPERATION The Mini-Rack oven controls have the capability of being customized to fit your own personal needs using the setup mode. Before entering the setup mode, read all the instructions to make sure you are completely clear on what to do. If you need assistance, please call your authorized Hobart Bakery Systems service agen ...
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Hobart HO300G - page 20
– 20 – Setup Guide Setup Number Setup Item Display P 1 Maximum Temperature This is the maximum temperature at which the oven can be Setpoint set. Range is 50°F to 525°F (10°C to 274°C). P 2 Preheat Temperature This is the default temperature setpoint when the oven is first turned on (Program 0). The preheat temperature cannot be set higher ...
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Hobart HO300G - page 21
– 21 – Setup Guide (cont) Setup Number Setup Item Display P14 Steam Timer Mode The STEAM TIMER can be set up to function in Bakery mode "0" (single steam function at the beginning of step/cycle) or Food Service mode "300 to 990" seconds interval between steam functions. P15 Interior Light Brightness This value is the brightn ...
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Hobart HO300G - page 22
– 22 – SHUTDOWN NOTE: Before restarting a gas oven, power and gas burner valve must be off for a minimum of 5 minutes. 1 . Remove all remaining product. NOTE: Vent can be used to evacuate steam from oven. 2 . Allow the oven to cool, then press the POWER ON OFF button. 3 . Clean the baking chamber. (See Cleaning.) 4 . For lengthy shutdowns, disc ...
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Hobart HO300G - page 23
– 23 – ACCESSORIES - HPC800 PROOFING CABINET The HO300 Mini Rotating Rack Oven can be ordered with the optional HPC800 Proofing Cabinet. The proofer is mounted on four casters (two front-swivel and two rear-fixed). The HPC800 Proofer has a 16-pan capacity that accommodates 18" x 26" (45.7 cm x 66 cm) baking trays with 3" (7.6 cm) ...
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Hobart HO300G - page 24
– 24 – DIMENSIONS AND SERVICE CONNECTION DIAGRAM NOTE: The proofer must be wired separately from the oven. ...
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Hobart HO300G - page 25
– 25 – CONTROLS Proofing 1 . Turn the power switch to the ON position. 2 . Turn the temperature knob to the desired setting. 3 . Turn the humidity knob to the desired setting. 4 . Allow 15 to 20 minutes for the proofer to reach set temperature and humidity. 5 . Load the product in the proofer. 6 . Turn the power switch to the OFF position when ...
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Hobart HO300G - page 26
– 26 – MAINTENANCE WARNING: THE MINI-RACK OVEN AND ITS PARTS ARE HOT. USE CARE WHEN OPERATING, SERVICING OR CLEANING THE OVEN. WARNING: DISCONNECT THE ELECTRICAL POWER TO THE OVEN AND FOLLOW LOCKOUT / TAGOUT PROCEDURES. GENERAL As Needed • Inspect the area around the oven. The area must be free and clear from combustibles. There must be no ob ...
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Hobart HO300G - page 27
– 27 – TR OUBLESHOO TING The oven has been set at the factory to bake assorted product, such as bagels, cookies and muffins. If your bake is uneven, the shutters may need to be adjusted to achieve the desired results. Contact your authorized Hobart Bakery Systems service agency for assistance. BURNERS WILL NOT LIGHT (GAS OVENS ONLY) 1 . Press t ...
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Hobart HO300G - page 28
– 28 – O WNER PREVENTIVE MAINTENANCE PROCEDURES INTRODUCTION This customer preventive maintenance (PM) section includes procedures to inspect for proper operation and cleaning of components. Owner Preventive Maintenance Procedures are written for gas ovens. They can also be used for electric ovens by omitting the steps that refer to components ...
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Hobart HO300G - page 29
– 29 – Inspect Oven Lamps 1 . Lamps should be on when oven is powered. 2 . If not, replace lamps. A. Unscrew lamp cover (Fig. 1) to disengage from lamp sockets. Remove lamp from socket. 3 . Reverse procedure to install new lamps. Fig. 1 Clean and Vacuum Components and Burner Area 1 . Clean the burner chamber (Fig. 2) area of dust and/or lint ac ...
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Hobart HO300G - page 30
– 30 – Inspect Rack Rotation Assemblies NOTE: Before performing rack inspection, observe condition of rack rotation belt. 1 . Check rack rotation belt. A. Gain access to the top of oven and loosen the screws securing rack rotation assembly cover (Fig. 5). B. Lift cover from top of oven. C. Observe condition of the rack rotation belt. If belt is ...
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Hobart HO300G - page 31
– 31 – Inspect Cavity Vent 1 . Check cavity vent for proper operation. A. Push VENT button (Fig. 7) on control panel to open vent and push again to close vent. B. Visually check that vent opens (Fig. 8) and closes (Fig. 9) when button is pushed. If vent does not operate, contact your local Hobart Bakery Systems service office. Fig. 7 Fig. 8 Fig ...
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Hobart HO300G - page 32
– 32 – Verify Ignition Module Safety Lockout Functions 1 . Verify ignition module safety lockout functions. A. Turn the oven on and close the doors. B. Turn off gas supply to oven. C. Set the oven control to call for heat, make sure convection fan is running. D. Remove screw securing control panel door and swing door open to access burner compa ...
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Hobart HO300G - page 33
– 33 – 2 . Verify operation of draft inducer pressure switch. A. Turn incoming power off to oven. B. Remove screw securing control panel door and swing door open to access burner compartment area. C. Loosen hose clamp (Fig. 11) and remove vacuum tube from the vacuum switch. NOTE: Some ovens may have rectangular-shaped vacuum switches. D. Reconn ...
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Hobart HO300G - page 34
– 34 – Verify Operation of Steam 1 . Check steam system for proper operation. A. Turn the water supply on. B. Turn the oven on and set to normal bake temperature. C. Allow to cycle three times to stabilize temperature. D. Set control to call for steam. E. Observe operation. If steam is not observed, contact your local Hobart Bakery Systems serv ...
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Hobart HO300G - page 35
– 35 – D E D E E N S A Y P O C S R E B M U N L A I R E S / L E D O M R E N W O D E D N E M M O C E R T S I L K C E H C E C N A N E T N I A M E V I T N E V E R P S A G - S N E V O K C A R Y R E K A B . N A E L C R O N O I T A R E P O R E P O R P R O F K C E H C Y R A S S E C E N S A E C I V R E S R O F L L A C s p m a l n e v o t c e p s n I s a ...
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Hobart HO300G - page 36
– 36 – FORM 36705 (Oct. 2005) PRINTED IN U.S.A. ...
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