Holman B910 Manuel utilisateur

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

FOR SERVICE INFORMATION

U.S. AND CANADA CALL: 1-800-225-3958

24 HOURS/DAY 7 DAYS/WEEK

TABLE OF CONTENTS

UNCRATING AND INSPECTION PAGE 1

ASSEMBLY AND INSTALLATION PAGE 1, 2

POWER SAVER SWITCH PAGE 2

COOKING PROCEDURES PAGE 3, 4

CLEANING PROCEDURES PAGE 4

TROUBLESHOOTING GUIDE PAGE 5, 6

MAINTENANCE PROCEDURES PAGE 7, 8, 9

PARTS LIST PAGE 10

DRAWINGS

HEAT REFLECTOR/CRUMB TRAY PAGE 1

LOAD AND UNLOAD TRAYS PAGE 1

ADJ. HEAT SHIELD, FRONT VIEW PAGE 3

COMPONENT ARRANGEMENT PAGE 6 & 8

HEATER TUBE INSTALLATION PAGE 7

DRIVE SYSTEM PAGE 9

WIRING DIAGRAM PAGE 11

REV. 1-31-96

MJC

FILE:F\MICHAEL\MANUALS\B910VA

HG0153

Page 1

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

UNCRATING AND INSPECTION

Unpack unit and components from container. Remove all visible packing

material, inspect unit for damage. If damage is discovered, file a claim

immediately with the carrier that handled the shipment.

ASSEMBLY AND INSTALLATION

A. Attach legs by screwing into weld nuts, as shown below.

B910LEG.WMF

LEG SCREWS INTO

WELD NUT AT BOTTOM

OF UNIT

B. Anti Skid pads are available at no charge and may be adhered to the foot

section of each leg to prevent sliding. Call 1-800-225-3958 for details.

WARNING: Use of these pads are not approved by the National Sanitation

Foundation.

C. Place unload tray as shown below.

LOAD UP AREA

HEAT REFLECTOR / CRUMB TRAY

TOAST CHUTETOAST CHUTE

(REAR DISCHARGE)

CAUTION: DO NOT OPERATE UNIT WITHOUT

CRUMB TRAY PROPERLY POSITIONED

AS THIS WILL CAUSE OVERHEATING IN THE

CONTROL BOX.

Assembly and installation continued on page 2 REV. 1-30-96 MJC

Page 2

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

ASSEMBLY AND INSTALLATION CONT.

WARNING: MAKE SURE ALL INPUT POWER IS OFF BEFORE

INSTALLING/REMOVING ANY PARTS.

WARNING:BEFORE INSTALLING UNIT(S), CHECK WITH LOCAL POWER

COMPANY TO DETERMINE ACTUAL VOLTAGE AT JOB SITE.

NEVER PLUG A 208 VOLT UNIT INTO 240 VOLTS OR A 240

VOLT UNIT INTO 208 VOLTS.

WARNING:BE ABSOLUTELY SURE THE GROUND CONNECTION FOR THE

RECEPTACLE IS PROPERLY WIRED. NEVER CONNECT UNIT TO

POWER WITHOUT PROPER GROUND CONNECTIONS. IMPROPER

GROUND MAY RESULT IN SEVERE INJURY OR FATALITY.

POWER SAVER SWITCH

Your Holman toaster is equipped with a Power Saver Switch, details are as

follows;

ROTARY POWER SAVER

FULL POWER

OFFOFF

1/4 POWER

STAND BY

WHEN POWER SAVER IS IN FULL

POWER POSITION, ALL THE HEATER

TUBES ARE ENERGIZED FOR TOASTING.

WHEN POWER SAVER IS IN STAND-BY

POSITION, ALL OF THE ELEMENTS

ARE ENERGIZED AT 1/4 POWER

USING YOUR POWER SAVER SWITCH

Power Saver

Switch Positions

FULL POWER- When in this position your unit is at Full Power and ready to use.

Conveyor Belt Speed Control to your desired settings.

OFF-ROTARY: Two off positions are provided so that a single rotation to either

direction will result in the unit being turned OFF.

STANDBY- The standby position reduces the power to the unit to 1/4, and

therefore saves 75% of the energy consumption. In this position your

unit will stay warm and reduce the reheat time when switched to Full

Power to 20 to 30 seconds.

REV. 8/4/97 MJC

PAGE 3

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

COOKING PROCEDURES

A. BAGEL TOASTING

1. On model B910 lower the Front Heat Shield all the way down, leave just

enough clearance for bagel slices to pass under the shield into the

cooking cavity (See illustration below).

ADJUSTABLE HEAT SHUTTE

2. Turn power saver to the full power position. Three top elements and one

lower element are now at full power. Turn Variable Speed Control

to 50.

3. Allow warm up time of 5 to 10 minutes.

4. Test with a bagel half.

a. If bagel is too light, turn Variable Speed Control counterclockwise to a

slower speed.

b. If bagel is too dark, turn Variable Speed Control clockwise to a faster

speed.

B. BUN TOASTING

1. Turn power saver to the full power position. Turn Variable

Speed Control to 50.

2. Lower the front heat shield as far as possible, leave just enough

clearance for the bun half to pass under and into the cooking cavity.

Refer to bagel toasting step 1 for adjustment instructions.

3. Test with a half of a bun.

a. If bun half is too light, turn Variable Speed Control counterclockwise

to a slower speed.

b. If bun half is too dark, turn conveyor speed control clockwise to a

faster speed.

Cooking procedures continued on page 4 REV. 11/14/97 MJC

PAGE 4

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

COOKING PROCEDURES CONT.

The model B910 has three tubes on the top and one on the bottom. Therefore

when placing the bun or bagel halves on the conveyor you should place them

cut side up.

CLEANING PROCEDURES

1. Turn Rotary Power Saver to the FULL POWER position.

2. For lightly soiled conveyor belts, turn Variable Speed Control to fastest

setting (100) and wipe with a damp cloth.

3. For heavily soiled conveyors, turn Variable Speed Control to fastest setting

(100) and wipe with a light abrasive pad.

4. Turn Rotary Power Saver to the OFF position.

5. After the unit cools, remove interior Crumb Tray (as shown below) and

clean. Slide Crumb Tray back into position. DO NOT OPERATE UNIT

WITHOUT CRUMB TRAY IN PLACE AS THIS CAUSES OVERHEATING IN

THE CONTROL BOX AND MAY ACTIVATE THE HEAT LIMIT SWITCH.

6. Wipe exterior surface of unit.

LUBRICATION OF DRIVE CHAIN WITH A GRAPHITE BASED LUBRICANT IS REQUIRED AS

PERIODIC MAINTENANCE. CALL HOLMAN FACTORY SERVICE DEPARTMENT FOR

DETAILS.

LOAD UP AREA

HEAT REFLECTOR / CRUMB TRAY

CONVEYOR BELT

IDLER SHAFT

DRIVE SHAFT

CONVEYOR LINK, MODEL T71

(TOP VIEW)

SHOWN WITHOUT TOP COVER

REV.12/23/96 MJC

PAGE 5

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

TROUBLESHOOTING GUIDE

A. UNIT WILL NOT HEAT, CONVEYOR WILL NOT TURN.

1. Be sure the main circuit breaker is switched to the ON position.

2. Check to see if the toaster is plugged in and all controls are turned to the

ON position.

B. UNIT WILL NOT HEAT, CONVEYOR TURNS PROPERLY.

1. Check to see if Rotary Power Saver has been turned to the FULL

POWER position.

2. Push Heat Limit Switch on rear of Control Box as shown below.

If this reactivates the Heater Tubes, see HEAT LIMIT SWITCH in

section C.

C. HEAT LIMIT SWITCH

Your Holman conveyor toaster is equipped with an automatically activated

Heat Limit Switch which interrupts the heater tube connections if the ambient

temperature in the Control Box exceeds 190F (88C). This Heat Limit Switch

can be reset manually by pushing the red button on the rear of the Control

Box as shown below.

LOAD UP AREA

HEAT REFLECTOR / CRUMB TRAY

RESET

THE HEAT LIMIT SWITCH IS ACTIVATED WHEN THERE IS NOT

SUFFICIENT AIR FLOW GENERATED BY THE COOLING FAN. WHEN

HEAT LIMIT SWITCH HAS BEEN ACTIVATED:

1. DISCONNECT UNIT FROM POWER SOURCE.

2. Check to see if air intake area in the bottom center of the Control Box

cover is free of dust, grease or other obstructions.

Troubleshooting guide continued on page 6 REV. 8/4/97 MJC

PAGE 6

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

TROUBLESHOOTING GUIDE CONT.

3. Check if Crumb Tray is in place. NEVER OPERATE UNIT WITHOUT

CRUMB TRAY IN PLACE AS THIS CAUSES OVERHEATING IN THE

CONTROL BOX.

4. If no obstructions to the air flow can be found and if the Crumb Tray is in

place, call Holman Factory Service Department at 1-800-225-3958 for

assistance.

D. CONVEYOR WILL NOT TURN, UNIT HEATS PROPERLY.

1. DISCONNECT UNIT FROM POWER SOURCE.

2. Remove right hand side panel (from operator's position). Loosen screws

holding Drive Motor in place and slide motor toward the rear of unit.

Remove Drive Chain and manually move conveyor belt to check for

mechanical binding. If conveyor moves freely, call Holman Factory

Service Department at 1-800-225-3958 as Drive Motor and/or Variable

Speed Control may need replacement.

DRIVE CHAIN

DRIVEN

SPROCKET

REAR BEARING

DRIVE

SPROCKET

CUT AWAY VIEW OF CONTROL BOX

DRVMTR.WMF

234

1- ROTOR

2- FIELD/STACK

3- GEAR BOX

4- MOUNTING

SCREW

5- DRIVE SPROCKET

6- MOTOR SHAFT

7- SET SCREW

E. DRIVE MOTOR RUNS AT ONE SPEED REGARDLESS OF SPEED

CONTROL SETTING.

1. Call Holman Factory Service Department at 1-800-225-3958 as Variable

Speed Control should be replaced.

REV. 12/23/96 MJC

PAGE 7

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

MAINTENANCE PROCEDURES

A. REPLACING HEATER TUBES (as below)

1. DISCONNECT UNIT FROM POWER SOURCE.

2. Remove right and left side panels.

3. Remove heater tube wire from terminal block connection, keeping

top and bottom wires separate.

4. Remove heater tube retainers by removing retaining screws with washer.

5. Gently, pull defective Heater Tube out of unit.

6. Gently, put new Heater Tube into unit.

7. Replace Heater Tube Retainers, reconnect heater tube wires to terminal

block and install side panels.

HEATER TUBE RETAINER

HEATER TUBE

TERMINAL STRIP

(4 P.O.S.)

B910RET.WMF

SIDE PANEL

HEATER TUBE RETAIN

HEATER TUBE

Maintenance procedures continued on page 8 REV. 1-30-96 MJC

PAGE 8

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

MAINTENANCE PROCEDURES (CONT.)

B. REPLACING FAN MOTOR

1. DISCONNECT UNIT FROM POWER SOURCE.

2. Remove Control Box Cover with Fan Motor attached.

3. Unplug power supply cord from Fan Motor.

4. Remove(4)screws which hold Fan Motor and grill to cover.

5. Put replacement motor and grill in place and secure to the Control Box

Cover with screws.

6. Reconnect power supply cord to Fan Motor.

7. Replace Control Box Cover.

FAN MOTOR

SECURED BY 4 SCREWS

CONTROL BOX COVER

AIR INTAKE

AIR INTAKE SCOOP

Maintenance procedures continued on page 9 REV. 8/4/97 MJC

PAGE 9

OPERATOR'S MANUAL

HOLMAN CONVEYOR TOASTERS

MODEL B910

MAINTENANCE PROCEDURES (CONT.)

C. REPLACING BELT DRIVE MOTOR

1. DISCONNECT UNIT FROM POWER SOURCE.

2. Remove right side panels and Control Box Cover.

3. Remove sprocket from motor shaft.

4. Remove the wire from terminal block connecting the Drive Motor to

internal wiring. On units rated 208 volts the white wire is used and on 240 volt

units the blue wire is used. Note which color leads are being used for these

connections and which lead is capped with white tape. The new motor should

use the same arrangement.

5. Remove screws holding motor in place.

6. Put new motor in place and attach loosely with mounting screws.

7. Replace sprocket on motor shaft.

8. Slide motor until the Drive Chain has about 1/8" slack when lightly pushed

at the center of its top open run.

9. Tighten screws to secure motor.

10. Rewire leads same as removed in step 4.

11. Replace side panel and Control Box Cover.

IF ASSISTANCE IS REQUIRED FOR THIS OR ANY OTHER PROCEDURE IN THIS

MANUAL CALL HOLMAN FACTORY SERVICE DEPARTMENT AT 1-800-225-3958.

24 HOURS/DAY 7 DAYS/WEEK

DRIVE CHAIN

DRIVEN

SPROCKET

REAR BEARING

DRIVE

SPROCKET

CUT AWAY VIEW OF CONTROL BOX

DRVMTR.WMF

234

1- ROTOR

2- FIELD/STACK

3- GEAR BOX

4- MOUNTING

SCREW

5- DRIVE SPROCKET

6- MOTOR SHAFT

7- SET SCREW

REV. 8/4/97 MJC

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