Marshall Air HT18 User Manual

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

Model HT18 w/ Optional LED Control

PRODUCT DESCRIPTION

The Marshall Model HT18 Horizontal Toaster produces caramelized buns hot and fast for building sandwiches to customer orders. This model has a slim horizontal footprint. Buns are loaded at the top and released onto a product slide at the bottom. The variable speed drive ranges from 20 seconds to 2 minutes. Heat controls are fully adjustable from 200- 565F with the LED Control. Left and right side toasting temperatures can be zoned for flexibility.

All controls are located inside a secured cabinet, eliminating unauthorized tampering. The toaster is adjustable for various crown and heel bread thickness. The multi-control feature options of this toaster produce and deliver the hottest buns in the shortest time.

Supplier Name: MARSHALL AIR SYSTEMS, INC Address: 419 Peachtree Drive South Charlotte, NC 28217 Model #: _______________________ Serial #’: _______________________ Date Received: _______________________ Date Installed: _______________________ Telephone #: 704-525-6230 Fax #: 704-525-6229 Service Referral # 800-722-3474 Local Service: _______________________ Local Service #: _______________________

GENERAL SPECIFICATIONS

Model: HT18 Horizontal Toaster Height: 11.500” Width: 25.000” Depth: 23.375” Options: LED Control Electrical: 208-240 VAC, 60Hz, 14-17A Power Cord: 8.0 ft 3 wire ground type UL rated (MM2A,MM2H, MM2J,

Weight: 115 lbs. Approvals: ETL/CETL, CSA, CE and NSF

MM2B, MM2B-ARB, MM2BINTL, MM2BINTLCE, MM2-EP, MM2G, MM2GINTL)

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OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

DO NOT STORE OR USE GASOLINE OR OTHER

FLAMMABLE VAPORS OR LIQUIDS IN THE

VICINITY OF THIS OR ANY OTHER APPLIANCE

Ne pas entreposer ni utiliser de l’essence ni d’autres vapeurs ou liquides inflammables dans le voisinage de cet appareil, ni de tout autre appareil.

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

AVERTISSEMENT: Une installation, un ajustement, une altération, un service ou un entretien non conforme aux normes peut causer des dommages à la propriété, des blessures ou la mort. Lisez attentivement les directives d’installation et d’opération et d’entretien avant de faire l’installation ou l’entretien de cet é

KEEP THIS MANUAL IN A SAFE PLACE AND RETAIN FOR FUTURE USE.

Toaster area must be kept free of combustible materials and the flow of ventilation air must not be obstructed. Operating personnel must not perform any maintenance or repair functions. Contact your Qualified Service Company.

FOR YOUR SAFETY

AVERTISSEMENT

ement

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

TABLE OF CONTENTS

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

OPERATION (UNITS WITH STANDARD PUSH BUTTON)................................................................... 2

OPERATION (UNITS WITH OPTIONAL 3 DIGIT CONTROL)...............................................................2

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

TOASTER CONTROL DESIGNATION................................................................................................... 4

TROUBLESHOOTING GUIDE ............................................................................................................4-8

REPLACEMENT PARTS...................................................................................................................9-10

CONTROL GENERATION 1 ELECTRICAL REPLACEMENT PARTS..................................................................11

CONTROL GENERATION 2 ELECTRICAL REPLACEMENT PARTS..................................................................12

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

CARRIAGE ASBY (MM2-EP,MM2H,MM2J,MM2B,MM2B-ARB,MM2BINTL,MM2BINTLCE) ..FIGURE 9 ADDITIONAL HANG-ON PARTS (MM2H, MM2J, MM2B, MM2B-ARB, MM2BINTL, MM2BINTLCE,

MM2-EP) .................................................................................................................................FIGURE10

SCHEMATICS CONTROL GENERATION 1 (SEE PAGE 4)

WIRING SCH (208 or 240V, 50/60HZ, 1PH) VARIABLE SPEED (REVISED 5/4/06) .......DWG #144046

WIRING SCH (208 or 240V, 50/60HZ, 1PH) VARIABLE SPEED (MM2G) .......................DWG #150484

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

WIRING SCH (208 or 240V, 50/60HZ, 1PH) VARIABLE SPEED (MM2H)........................DWG #150891

WIRING SCH (208 or 240V, 50/60HZ, 1PH) VARIABLE SPEED (MM2J) ........................DWG #150881

WIRING SCH (208 or 240V, 50/60HZ, 1PH) VAR SPEED (MM2B, MM2C, MM2-EP) .....DWG #152229

WIRING SCH (240V, 50/60HZ, 1PH) VARIABLE SPEED (MM2BINTL, MM2BINTLCE)..DWG #158451

WIRING SCHEMATIC (240V, 50/60HZ, 1PH) VARIABLE SPEED (MM2B-1)..................DWG #159717

WIRING SCHEMATIC (240V 50/60HZ 1PH) VARIABLE SPEED (MM2GINTL)...............DWG #157401

SCHEMATICS CONTROL GENERATION 2 (SEE PAGE 4)

WIRING SCHEMATIC (208 OR 240V, 50/60HZ, 1PH) (MM2B-NC, MM2B-ARB) ..........DWG #163997

WIRING SCHEMATIC (220-240V, 1PH) (MM2BINTLCE-NC)..........................................DWG #164834

WIRING SCHEMATIC (220-240V, 1PH) (MM2GINTL-NC)..............................................DWG #166307

WIRING SCHEMATIC (208-240V, 1PH) (MM2G-NC)......................................................DWG #166832

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ 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. The voltage should match the toaster name plate. CAUTION: DO NOT REMOVE THE ELECTRICAL CONTROL PANEL COVER ON 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. Be sure that location does not block the intake holes or slots at top of

toaster.

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. Make sure seam is against platens (facing top of toaster). USE ONLY MARSHALL APPROVED PLATEN SHEETS OR TOASTER WARRANTY IS VOID.

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.

9. Unit is ready to use in approximately 15 minutes.

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

(see Figure 2 for knob locations). 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. The Adjustment Ranges (except MM2B, G) are .625” – 1.438”. The MM2B, MM2BINTLCE, MM2G range is .375” – 1.438”.

NOTE: For MM2B-ARB Models: Start with Crown @6, Heel @3.5-4. See detail A in Figure 1 for determination. Use the edge of the gauge metal not the scratched line from manufacturing.

13. The conveyor speed is preset at the factory. The approximate adjustable speed ranges for the MM2A unit

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

toaster belt is 8 – 70 seconds; the MM2B and MM2G series is 9 – 105 seconds.

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.

15. If necessary, the speed of the conveyor can be changed. The speed control is located behind a box on the

front of the unit. (See Figure 2) which can be removed using a 5/32 Allen wrench through the hole in the front. Adjust as needed and reinstall box.

OPERATION (OPTIONAL PUSH BUTTON MM2A SERIES)

1. The toaster is operated by pressing and releasing the button on the right side of the unit.

2. Allow the toaster to heat up for at least 15 minutes prior to use.

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 and enough to remove parts after at least 30 minutes.

OPERATION (OPTIONAL 3 DIGIT CONTROL)

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

Contact your local qualified service agency.

hold the button on right side of toaster for three (3) seconds. The toaster will cool

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

defective. Contact your local qualified service agency. defective. Contact your local qualified service agency.

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

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

Contact your local qualified service agency.

PREVENTIVE MAINTENANCE DAILY CLEANING:

1. Remove conveyor carriage from toaster body. Take conveyor carriage to sink and spray with water.

2. Clean platen sheet three (3) times daily as listed below: a. After lunch rush – Clean sheet in place using a damp cloth or non-abrasive pad. If sheet has black

butter buildup, it must be wiped off. Use Sizzle cleaner if necessary.

b. After dinner rush – Clean sheet in place using a damp cloth or non-abrasive pad. If sheet has black

butter buildup, it must be wiped off. Use Sizzle cleaner if necessary.

c. After closing – Remove sheet from toaster. Place on a flat surface and clean using a damp cloth or

non-abrasive pad. If sheet has black butter buildup, it must be wiped off. Make sure to install sheet seam again platen (facing top of toaster).

3. Wipe any blockages that may be in the upper slots and holes on the side of toaster.

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

5. MM2B Series Only: Wipe the product slide sheet and the bun ramp sheets. Use a damp cloth or nonabrasive pad. If sheet has black butter buildup, it must be wiped off.

6. Reinstall all parts after drying.

WEEKLY MAINTENANCE:

1. Perform Daily Maintenance.

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

MARSHALL APPROVED PLATEN SHEETS OR TOASTER WARRANTY IS VOID.

MONTHLY MAINTENANCE:

1. Perform Daily Maintenance.

QUARTERLY MAINTENANCE:

1. Inspect motor brushes. Replace if ¼” in length or shorter.

2. Perform Daily, Weekly & Monthly Maintenance.

ANNUALLY MAINTENANCE:

1. Replace two (2) motor brushes.

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

TOASTER CONTROL DESIGNATION

Before any troubleshooting or replacement parts are ordered, it is necessary to determine the style of control that your toaster has. Generation 2 started in March 2014, but older toasters may or may not have been field upgraded from Generation 1 to Generation 2.

GENERATION 1 GENERATION 2

Buttons to the right of the LED display. Buttons underneath the LED display.

TROUBLESHOOTING GUIDE

NOTE: SERVICE MUST BE PERFORMED BY A QUALIFIED SERVICE COMPANY

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: Toaster shuts off intermittently and/or no heat and conveyor belts do not move. (Will not turn on.)

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. If LED control, 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

. THE

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

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

D. If push button is on side panel, check two wires to make sure they are tight.

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,

check 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.

C. Check sensors to see if OHM readings are correct. At room temperature (70°F), should be

nominal 1.09K ohms. (NOTE: A defective sensor will not allow toaster to power on, but error messages are not visible if toaster is equipped with push button.)

D. With toaster off, check for continuity across the solid state relay terminals #1 and #2. Normal

readings are in mega ohm range. If reading ohms, relay has failed closed and will not cycle.

E. Control Generation 2 if no LED on display, check for .5 amp transformer fuses. If fuses good,

check for 208 volts on terminals 1 and 6, then 18 Vac on 11 and 12. If 208 volts is present and no 18 Vac output, replace transformer.

2. PROBLEM: Conveyor belts move but no heat. SOLUTION:

QUALIFIED TECHNICIAN CHECK:

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

on the toaster nameplate.

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

wiring with same or higher rated wire.

E. Check the resistance of the sensor(s). If sensor is open, replace. At room temperature (70°F),

Ohms should be nominal 1.09K ohms.

F. Check voltage into solid-state relays. The voltage input from module should be approximately

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

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

H. Control Generation 2 – Check for 24Vdc to the heater relay (R1, R2) from the control board. If

getting 24Vdc from the control board, check for 208 volts on output side of relay. If no 208 volts then replace relay. If there is 208 volts, then possible solid state relay problem.

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.

check connections inside of plug. Remove right side panel and

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

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

on the toaster nameplate.

B. Check the fuses inside the right panel. Replace with type AGC 1.5 amp fuse if necessary.

Check for red light on the speed board. If red light is lit, the motor is working too hard or in a stalled state.

C. Some speed boards have a green light. If green light is lit then power is D. Make sure the input voltage switch (es) of the speed board is set at 230V. E. Check for DC voltage out of board to motor. F. Check all wiring to motor for loose connectors. G. Check motor ohms, should be approximately 50-80 ohm s.

4. PROBLEM: Variable Speed Motor Not Operating

SOLUTION:

QUALIFIED SERVICE TECHNICIAN CHECK:

A. Verify correct voltage to unit and motor. B. Check 1.5-amp fuses (#500061) inside right control panel. Replace if necessary. C. Check for DC voltage to motor out of board (90VDC Motor). D. Check motor ohms. Should be approximately 60 ohms. E. If red light on board is on, disconnect load from motor by removing conveyor carriage. If it goes

out, look for conveyor binding. If it stays lit, replace motor –there is probably a gearbox problem.

F. Check DC amp draws to motor by putting meter in series with motor. (Pull wire from A1 on

board, put one lead to A1, other to wire pulled from A1.) When red LED on board is on, DC amp reading should be .3 amps approximately.

G. If green LED is on and red is not, make sure that there is varying DC voltage out of board to

motor (terminals A1 & A2 on board) as speed control knob is increased or decreased.

H. Check for oil leaks on motor signifying bad seal or overheating that has taken place. In either

case, motor should be replaced.

5. PROBLEM: Circuit Board not working properly. DO NOT ADJUST POTS ON BOARD!

SOLUTION:

QUALIFIED SERVICE TECHNICIAN CHECK:

A. Verify AC voltage to board and DC voltage to motor from board. If there is AC voltage in, but no

DC voltage out, replace board.

B. Check all connections on board and terminal strip. C. Verify that board is wired correctly. (See schematic in Owner’s Manual.) D. Make sure that switch on board is in 230V position. E. Make sure all wires are connected to potentiometer. A loose wire will make toaster run at single

uncontrolled speed.

going to the board.

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MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

F. Control Generation 2 – Check for 24 Vdc from control board to motor relay (R3). If relay is

getting 24 Vdc, check for 208 volts on output side of relay. If no 208 volts, replace relay.

6. PROBLEM: Product is over or under toasted.

SOLUTION:

OPERATOR CHECK:

A. Check the gap settings. There must be compression of the bun as it feeds into the toaster.

Decreasing the gap will increase bun temperature and darken surface color. To lower (decrease gap) turn knob counter-clockwise; to raise (increase gap) turn knob clockwise.

B. Check toast time. Time should be 20 seconds nominal from start to finish. C. Check conditions of toaster platen sheet and belts. Clean both as noted in this manual. D. Make sure conveyor belts are not binding. E. Check drive system for loose sprockets.

QUALIFIED SERVICE TECHNICIAN CHECK:

A. Check that heaters are cycling. Do this by using an amp clamp on either of the wires from the

controller to the platen. You are looking for cycling. Also verify that the temperature controller has power.

B. Check that the 3 wires from the speed board are hooked to the speed control.

7. PROBLEM: Buns do not feed properly into toaster.

SOLUTION:

OPERATOR CHECK:

A. Check condition of the toaster platen sheet to be sure buns are not sticking. Clean sheet as

described in daily maintenance. Replace if needed. Sheet should be rotated daily.

B. Check toaster platen sheet installation. C. Toaster gap set too close or too far. See instructions on Page 1, Number 12.

8. PROBLEM: Buns do not exit toaster.

SOLUTION: OPERATOR CHECK:

A. Check condition of the toaster platen sheet to be sure buns are not sticking. Clean sheet as

described in daily maintenance. Replace if needed. Sheet should be rotated daily.

B. Check toaster platen sheet installation. C. Toaster platen gap set too close.

QUALIFIED SERVICE TECHNICIAN CHECK:

A. Check tension on lower conveyor. If too loose, buns will not exit. Tighten conveyor by adjusting

the Plate Tension Assembly (See Figure 5).

OWNER’S MANUAL

MODEL HT18 AUTOTOAST™ HORIZONTAL TOASTER

9. PROBLEM: Gap setting knobs jammed.

SOLUTION:

OPERATOR CHECK:

A. Turn knobs counter-clockwise. Indicator is read using top B. Turn both knobs at same time. Platen sheet could be interfering.

10. PROBLEM: Conveyors turning intermittently.

SOLUTION:

OPERATOR CHECK:

A. Make sure carriage is pushed back and latch is engaged. B. Check for bent parts on the carriage; for example, handle, back flange. C. Check bottom rail flange for bending. Refer to the Technical Bulletin at the end of this manual

for instructions.

D. Tighten latch mechanism. Use a screwdriver and 7/16” wrench. It is necessary to remove right

side cover to access.

E. Conveyor bearings need replacing

11. PROBLEM: “Shim” required between latch and conveyor carriage to get conveyors to turn.

SOLUTION:

A. Latch is bent. Bend latch back to straight.

12. PROBLEM: Conveyors continue to run after unit is turned off.

SOLUTION:

A. Cycle On/Off again to see if motor stops. B. Motor must be replaced.

13. PROBLEM: Motor Noisy/Chirping

SOLUTION:

A. Remove motor brushes and inspect. If ¼” less, replace with new. B. If longer than ¼”, replace brushes and tighten cap. Do not over tighten.

edge.

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