Marshall Air HT18 Service Manual

OWNER’S MANUAL

MODEL HT18 CFA – HORIZONTAL TOASTER

OWNER'S MANUAL

HT18 CFA

With Special Warranty Procedures

For Chick-fil-A Rollout

Rollout Start date – 3/1/04 – 3/1/05

MARSHALL AIR SYSTEMS, INC.

419 Peachtree Drive South

Charlotte, NC 28217

Customer Service 800-722-3474

OWNER’S MANUAL

MODEL HT18 CFA – HORIZONTAL TOASTER

TABLE OF CONTENTS

INSTALLATION.............................................................................................................................................1

OPERATION (UNITS WITH LED CONTROL)..............................................................................................2

PREVENTIVE MAINTENANCE.................................................................................................................2-3

TROUBLESHOOTING GUIDE...................................................................................................................3-6

REPLACEMENT PARTS ...........................................................................................................................6-7

TOASTER LIMITED WARRANTY ................................................................................................................8

SPECIAL CFA TOASTER WARRANTY RETURN PROCEDURES............................................................. 9

ILLUSTRATIONS

OVERALL DIMENSIONS............................................................................................................FIGURE 1, 2

HANG-ON PARTS ..........................................................................................................................FIGURE 3

TOASTER PLATEN SHEET...........................................................................................................FIGURE 4

CARRIAGE ASSEMBLY.................................................................................................................FIGURE 5

DRIVE MOTOR ASSEMBLY ..........................................................................................................FIGURE 6

HEATING PLATEN ASSEMBLY.....................................................................................................FIGURE 7

CONTROLLER VOLTAGE CONVERSION ....................................................................................FIGURE 8

SCHEMATICS

WIRING SCHEMATIC (208 or 240V, 60HZ, 1PH) VARIABLE SPEED.................................. DWG #144046

TECHNICAL BULLETIN, CARRIAGE CONVEYOR............................................................... DWG #144885

MARSHALL’S COMMITMENT TO QUALITY AND PRODUCT IMPROVEMENTS MAY CAUSE CHANGES FROM TIME TO TIME.. PLEASE CHECK CHICK-FIL-A EQUIPMENT WEBSITE OR CONTACT MARSHALL AIR SYSTEMS, INC.

OWNER’S MANUAL

MODEL HT18 CFA – HORIZONTAL TOASTER

INSTALLATION PRE-INSTALLATION

1. The toaster is packaged to minimize the risk of shipping damage. Immediately upon receipt, make certain to inspect the unit for damage. FILE ALL CLAIMS WITH THE FREIGHT CARRIER.

2. It is necessary to check your voltage at the receptacle. Toaster is factory shipped for 208 volts. If voltage at receptacle is 230V or higher, it is necessary to simply change a jumper inside toaster. CAUTION:

THE RIGHT SIDE OF UNIT WITHOUT FIRST TURNING OFF THE TOASTER AND UNPLUGGING THE TOASTER. See Figure 8 for instructions.

FINAL INSTALLATION

1. Place unit on a level surface.

2. Check that all covers are in place on the toaster.

3. Remove the plastic covering the top and sides.

4. Remove the conveyor carriage and wash with warm soapy water and sanitize.

5. Check that the toaster platen sheet is installed under the contact platens. The toaster platen sheet is installed by placing rods into arms of toaster. See Figure 4.

6. Reinstall conveyor carriage and latch.

7. Connect the toaster to the power supply.

8. Press the on/off button and check for free movement of the two conveyor belts. The LED control display will read “Lo.”

9. Unit is ready to use in approximately 15 minutes. LED control will display “Rdy.”

10. After warm up, insert buns into the toaster at the front 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 UP.

11. The toasted heel and crown will return to the toaster front together. Check the appearance of the toasted buns.

12. Adjust the gap between the conveyor and the toaster heat platens using the two knobs on top of the unit. Both must be lowered at the same time. The knobs are labeled “HEEL” and “CROWN”. The height gauges in the front indicate whether you are raising or lowering the platens.

13. The conveyor speed is preset at the factory.

14. Test at least 3 buns before putting the toaster into service. Uniform surface toasting and bun temperature are achieved when the gap described in step 12 is set correctly.

DO NOT REMOVE THE ELECTRICAL CONTROL PANEL COVER ON

OWNER’S MANUAL

MODEL HT18 CFA – HORIZONTAL TOASTER

OPERATION

1. The toaster is operated by pressing and releasing the “I/O” Button of the control. “Lo” will be displayed.

2. The display of the control will show “Rdy” once the toaster is up to temperature. (Approximately 15 minutes.)

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

4. To turn off, press means unit is still too hot to remove any parts. Once the toaster has cooled (approximately 30 minutes), the display will show “Off.”

5. The LED Control will indicate important information:

A. Press and release either the Heat 1(Crown) or the Heat 2 (Booster) Button, the pre-

programmed temperature settings will flash. This will display for 5 seconds or until another button is pressed.

B. Press and hold either the Heat 1(Crown) or the Heat 2 (Booster) Button for 3 seconds, the

actual platen temperatures will be displayed. This will display until another button is pressed.

6. Definitions of various displays:

“Off” Unit is off and not operating. “Lo” Heater platens have not reached programmed set temperature. “Rdy” Unit has reached programmed set temperature and is ready to toast. “Hi” Unit is off and too hot to touch most removable parts. “AL1” This is an alarm message that indicates the Left Platen Probe is disconnected or

“AL2” This is an alarm message that indicates the Right Platen Probe is disconnected

“AL3” This is an alarm message that indicates the Left Platen is too hot. Unit shuts off. “AL4” This is an alarm message that indicates the Right Platen is too hot. Unit shuts

and hold the “I/O” Button for three (3) seconds. “Hi” will be displayed which

defective.

or defective.

off.

PREVENTIVE MAINTENANCE DAILY:

1. Remove conveyor carriage from toaster body.

2. Take conveyor carriage to sink and spray with water.

OWNER’S MANUAL

MODEL HT18 CFA – HORIZONTAL TOASTER

3. Carefully remove the toaster platen sheet, lay it on a flat surface, and wipe with a soft cloth or towel and clean with soap and water. Use ONLY enough water to make the cloth damp. DO NOT

USE ABRASIVES ON THE TOASTER PLATEN SHEET OR IMMERSE IN WATER. If sheet has black, butter buildup, the buildup must be wiped off before using.

4. Rotate toaster platen sheet so the surface of the sheet is opposite than the day before.

5. While toaster is in upright position, wipe cooling fan discharge with a dry cloth or towel.

6. Reinstall all parts after drying.

WEEKLY:

1. Perform Daily Maintenance.

2. Replace any worn out toaster platen sheets with Marshall Part #503983 (4 pack).

MONTHLY:

1. Perform Daily Maintenance.

TROUBLESHOOTING GUIDE

NOTE: SERVICE 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 TOASTER IS UNPLUGGED.

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

A. Check that toaster is plugged in. Check condition of power cord and plug. B. Check circuit breaker in main breaker panel. Reset if necessary. C. Check for error message. “AL1” message is a defective left platen probe. “AL2” is a defective

right platen probe. “AL3” is high temperature error of the left platen. “AL4” is high

temperature error of the right platens. “AL3” and “AL4” alarms will turn unit off requiring a

OWNER’S MANUAL

MODEL HT18 CFA – HORIZONTAL TOASTER

service call.

QUALIFIED SERVICE TECHNICIAN CHECK:

A. Check that there is power at receptacle. Verify voltage is correct based upon the voltage listed on

the toaster nameplate.

B. WITH UNIT UNPLUGGED

wiring. Any wires or terminals with burns or discoloration from arcing should be replaced. All wiring, if replaced, should be same or higher rated wire.

2. PROBLEM: Conveyor belts move but no heat.

SOLUTION: QUALIFIED TECHNICIAN CHECK:

A. Check for loose connections at terminal strip and temperature terminals (see schematic). B. Verify that the heater and sensor wires are connected to the controller. C. Replace all connections or components that have damaged terminals. Replace any damaged

wiring with same or higher rated wire.

D. Check the resistance of the sensor(s). If sensor is open, replace. E. Check voltage into solid-state relays. The voltage input from module should be approximately

5Vdc. Voltage to heater should be 208 or 240Vac.

F. Check the resistance of the heater platens: 24 ohms at room temperature

3. PROBLEM: Heater platens are hot, control says LO or RDY, conveyor belts do not move. SOLUTION:

OPERATOR CHECK:

A. Make sure carriage is pushed completely in and latch is engaged. B. Remove conveyor carriage and turn conveyors by hand and determine there is no binding due to

dropping carriage.

C. Make sure all setscrews on gears are tight. D. Check motor to make sure it is turning with carriage removed.

QUALIFIED SERVICE TECHNICIAN CHECK: A. Check the fuses inside the right panel. Replace with type AGC 1.5 amp fuse if necessary.

B. Check for voltage to speed control board. Check for voltage to the motor. C. Check for red light on the speed board. If red light is lit, the motor is working too hard or in a

stalled state. D. Some speed boards have a green light. If green light is lit then power E. Make sure the input voltage switch(es) of the speed board is set at 230V. F. Check for DC voltage out of board to motor. G. Check all wiring to motor for loose connectors.

4. PROBLEM: Variable Speed Motor Not Operating SOLUTION: QUALIFIED SERVICE TECHNICIAN CHECK:

A. Verify correct voltage to unit and motor.

, check connections inside of plug. Remove right side panel and check

is going to the board.

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