Marshall Air VT12 Service Manual

This document contains the installation and operating instructions for:

VERTICAL TOASTER MODEL VT12

Supplier Name: MARSHALL AIR SYSTEMS, INC. Address: 419 Peachtree Drive South Charlotte, NC 28217 Serial #: _________________________

_________________________ _________________________ Date Received: ________________________ Date Installed: ________________________

Telephone #: 704-525-6230 Toll Free #: 800-722-3474 Customer Service Fax #: 704-525-6229 Local Service Name: _________________________ Local Service #: _________________________ Conveyor Speed Setting: _________________________ Temperature Settings: Crown Side: ________________________ Heel Side: ________________________ Platen: ________________________

TABLE OF CONTENTS

I . GENERAL DESCRIPTION................................................................................................ 1

II. INSTALLATION................................................................................................................. 1 -2

III. OPERATION......................................................................................................................3

IV. PREVENTIVE MAINTENANCE ........................................................................................3

V. TROUBLESHOOTING GUIDE.......................................................................................... 4 - 5

VI. TOASTER LIMITED WARRANTY...................................................................................... 6

VII. TOASTER WARRANTY PROCEDURES ......................................................................... 7

ILLUSTRATIONS

OVERALL DIMENSIONS ...................................................................................................... FIGURE 1

OVERALL VIEW.................................................................................................................... FIGURE 2

HANG-ON PARTS AND CONTROL PANEL ........................................................................ FIGURE 3

EXTERNAL CONTROLS ILLUSTRATION AND TOASTER PLATEN SHEET..................... FIGURE 4

INTERNAL PARTS AND DRIVE COMPONENTS ................................................................ FIGURE 5

INTERNAL PARTS AND DRIVE COMPONENTS ................................................................ FIGURE 6

ADJUSTMENT LEVER OPERATION ................................................................................... FIGURE 7

CONVEYOR DRIVE ASBY................................................................................................... FIGURE 8

WIRING SCHEMATIC -#130197 (208V, 50/60HZ, 1 PH)

WIRING SCHEMATIC-#131117 (240V, 50/60HZ, 1PH) WIRING SCHEMATIC - #132088 (220V, 50/60HZ, 1PH)

WIRING SCHEMATIC-#130168 (208V, 50/60HZ, 1PH) WITH NEUTRAL

I. GENERAL DESCRIPTION

The Marshall High Speed Vertical Toaster produces a grilled effect on the cut side of sandwich buns. The buns are inserted at the top of the unit and are pressed against a heated platen surface, which is covered by a replaceable toaster platen sheet. The buns are discharged onto a product slide at the bottom of the unit. The system is high speed and also variable in speed. Additionally, there are separate heat controls for the bun crown, heel, and cut surface temperatures. These are safely located inside the secure cabinet thus eliminating unauthorized tampering with settings. The flexibility of this toaster is unmatched allowing operators to produce the hottest buns in the shortest time.

GENERAL SPECIFICATIONS

Height: 21.125" Width: 12.625" Depth: 18.875"

Electrical: 208V Single Phase 21 Amps

Special Note: If toaster is wired to a 240V single phase supply, special adjustments are required, see note 1A under "INSTALLATION AND

OPERATION." Power Cord: 6 ft. 4 wire including ground, with NEMA L14-30P Plug Weight: 62 Ibs.

**INTERNATIONAL:

Electrical: 220V and 240V Single Phase supply with infinite switch controls factory set at

position 9. DO NOT CHANGE BOOST HEAT INFINITE SWITCH CONTROLS TO A POSITION HIGHER THAN 9.

Power Cord: 6FT 3 wire including ground, with NEMA L6-30 Plug, ( Plug not supplied with

220V or 240V units)

II. INSTALLATION

PRE-INSTALLATION

1. This toaster is shipped completely wired and ready to plug into a grounded NEMA L14 30 receptacle. (208 Volt Single Phase, 3 wire with ground circuit). Check receptacle for proper voltage and phase.

2. Other voltages - some localities may only have 240 volts and a 208 volt machine has been used. To compensate remove the control cabinet side cover WITH THE UNIT UNPLUGGED and turn the two temperatures switches that are pointer type knobs from a setting of 12 down to a setting of 9. This same action even on a 208 volt unit will produce considerable Grill cover life extension at the penalty of buns taking 10-15 seconds longer to achieve maximum temperature. In other words, a toast time of 30 seconds instead of 18 seconds. DO NOT CONNECT HIGH LEG OF A 240 VOLT CIRCUIT TO TOASTER. THERMOSTAT IS FACTORY SET AT 10.

** International 240V Units are shipped with plug NEMA L6-30, and are 240Volt, Single Phase, 3 wire

including ground. DO NOT CHANGE BOOST HEAT INFINITE SWITCH CONTROLS TO A POSITION HIGHER THAN 9.

INSTALLATION

1. Place toaster on level metal surface.

2. Install product slide on the underside of the toaster. The product slide hangs on a rod located under the toaster and directs the buns out from under the toaster.

3. Check that the two lift off side covers are in place on the toaster. One is marked "Heel", which indicates the side of the toaster for inserting the bottom, or heel, of the bun.

4. Check that the toaster platen sheet is installed over the contact platen. The toaster platen sheet is installed from the top of the unit by lightly creasing it at the center, and directly hanging it on the contact platen. NOTE: THE NOSE GUARD SHOWN IN FIG 4, KEEPS THE TOASTER PLATEN SHEET IN PLACE.

5. Connect the toaster to the power supply.

6. Turn on the conveyor switch on the toaster and check for free movement of the two conveyor belts.

7. Turn on the heat switch . Allow 15 minutes for the toaster to warm up before toasting buns.

8. After warm up, drop buns into the toaster at the top of the unit. For proper operation, insert heels on the side of the toaster marked "Heel", and crown on the opposite side. The cut sides of the heel and crown must face each other.

9. The toasted heel and crown will drop down onto the product slide together. Check the appearance of the toasted buns.

10. Adjust the gap settings using the two levers on the side of the toaster. (See Figure 7). The levers are labeled, one lever for the "Heel" gap, and one lever for the "Crown" gap. To adjust the gap, pull out the lever to disengage the rod from the locator holes, and turn the lever to the desired position so the rod engages in one of the locator holes.

11. The speed control can be adjusted to control the conveyor belt speed to lighten or darken the toasted product. The toaster is shipped with the speed control set on 50. On early models where the speed control is located on the front panel loosen by hand the thumb screw to allow the speed control knob to turn. After adjusting the speed control, hand tighten the thumb screw to secure the knob. On current models, the speed control is located behind a cover on the front panel.

12. The temperature of the toaster can be field adjusted. Before making adjustments, disconnect the toaster from its' power source. Remove screws and control pane! cover (Fig 3). To decrease the temperature of the platen, crown side, or heel side, select the respective control (Fig 3), and rotate to next decreasing number. Allow to stabilize for 20 min. and retest. Repeat until desired product is reached. Record new settings on the front of your owner's manual.

13. Test at least 3 buns before putting the toaster into service.

III. OPERATION

1. The toaster is operated by turning on the conveyor switch (Figure 4) and then the heat switch.

2. Allow the toaster to warm up for 15 minutes before toasting buns.

3. For proper operation, insert heels on the side of the toaster marked "HEEL", and crowns on the opposite side.

4. Turn both switches off at the end of the day to turn the toaster off.

5. Toaster Platen Sheet General Information:

A . The toaster is not designed for use with buttered buns. B. Life of Toaster Platen Sheet - 3 to 5 weeks depending on usage.

C. Sheet turning white - this is black pigment fading out of the sheet and does not mandate sheet

replacement.

D. What triggers sheet replacement? When buns no longer feed through the machine but instead are

damaged or torn by the machine, the toaster platen sheet should be replaced.

E. How to get maximum life? Only the heel side of the sheet gets white and therefore has the shortest

life. Rotate the sheet daily so the white side is opposite from the day before.

F. A slightly lower heel side booster temperature setting will extend toaster platen cover life and still

may meet bun temperature objective.

CAUTION: DO NOT REMOVE THE CONTROL PANEL COVER WITHOUT FIRST TURNING OFF THE TOASTER AND UNPLUGGING THE TOASTER.

IV. PREVENTIVE MAINTENANCE DAILY:

When the toaster is cool, remove the product slide (Fig 3) and clean with soap and water and allow to dry. Carefully, remove the toaster platen sheet (Fig 4), lay on a flat surface, and wipe with a soft cloth or towel and clean with soap and water. DO NOT USE ABRASIVES ON THE TOASTER PLATEN SHEET.

Re-install all parts after drying. WEEKLY:

1. Turn toaster off and unplug power cord from wall receptacle.

2. Perform daily maintenance.

3. Remove heel side cover and crown side cover by lifting these covers off the toaster. Clean these covers with soap and water. Wipe the conveyor belt and exposed metal parts with a damp soft cloth or towel.

4. Assemble the covers and re-connect the power cord.

TROUBLE SHOOTING GUIDE

NOTE: INSTALLATION MUST BE PERFORMED BY A QUALIFIED SERVICE COMPANY. THE TERM

"QUALIFIED SERVICE COMPANY" MEANS ANY INDIVIDUAL, FIRM, CORPORATION OR COMPANY WHICH IS EITHER ENGAGED IN AND IS RESPONSIBLE FOR THE INSTALLATION OR REPLACEMENT OF ELECTRICAL COMPONENTS, OR THE CONNECTION, INSTALLATION OR REPAIR OF ELECTRICAL APPLIANCES, WHO IS EXPERIENCED IN SUCH WORK, FAMILIAR WITH ALL PRECAUTIONS REQUIRED, AND HAS COMPLIED WITH ALL THE REQUIREMENTS OF THE AUTHORITY HAVING JURISDICTION.

WARNING: INSPECTION, TESTING, AND REPAIR OF ELECTRICAL EQUIPMENT SHOULD BE PERFORMED

BY QUALIFIED SERVICE PERSONNEL. THE UNIT SHOULD BE UNPLUGGED WHEN SERVICING, EXCEPT WHEN ELECTRICAL TESTS ARE REQUIRED.

DANGER: USE EXTREME CARE DURING ELECTRICAL CIRCUIT TESTS. LIVE CIRCUITS WILL BE EXPOSED.

WHERE TESTING INDICATES "WITH POWER OFF", BE SURE THAT THE CONVEYOR AND HEAT SWITCHES ARE OFF AND TOASTER IS UNPLUGGED.

PROBLEM:

1. No heat and conveyor belts do not move. SOLUTION:

A. Check that toaster is plugged in. B. Check that conveyor and heat switches are on. C. Check that power is available at the 208 Volt receptacle or 220 or 240 Volts for International units. D. With unit unplugged, check connections inside of plug. E. With unit unplugged, remove control panel cover screws and remove control panel cover. Check electrical

connections for burns, discoloration or arcing. Replace all connections or components that are damaged. Replace all damaged wiring with new wire that is the same or a higher rated, wire.

PROBLEM:

2. Conveyor Belt moves but no heat.

SOLUTION:

A. Check that the heat switch is on.

B. Turn off switches and unplug toaster. Remove control panel cover and check position of infinite

switches and thermostat.

C. Check for loose connections at inf inite switches, thermostat, and heating elements.

D. Replace all connections or components that are damaged. Replace all damaged wiring with new wire

that is the same or a higher rated wire.

E. Check resistance of heating platen and elements:

Toaster

Platen

Crown

Element

Heel

Element

Schematic - (208V Platen) 24 OHMS 45.8 OHMS 29 OHMS

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