Wells Manufacturing B-50 User manual

PRELIMINARY SERVICE MANUAL

ELECTRIC CHAR BROILERS

WELLS MANUFACTURING COMPANY

P.O. Box 280 VERDI, NV. 89439

PHONE: (702)345-0444

FAX: (702)345-0569

Part #62455

Data sheets and text of this manual are representative of current

production models as of 12/17/91. Specifications, Model Numbers,

and data are subject to change at any time without notice.

CAUTION:

NEVER SUBMERGE ELECTRICAL EQUIPMENT IN WATER. AVOID CONTAMINATING

ELECTRICAL COMPONENTS WITH MOISTURE WHEN CLEANING CABINET SURFACES.

When service is required to connect electrical or temperature complaints, always

refer service to a Wells Factory Authorized Service Agency. NOTE: Refer to Wells

Form 37001 for a complete listing of Factory Authorized Service Agency Locations.

CAUTION:

When servicing or cleaning the equipment in this manual, always remove live power

for safety. Use proper cautions when power must be restored while making live

voltage measurements to avoid the possibility of electrical shock.

01/10/92 Rev.-

PAGE i-1 TABLE OF CONTENTS 'SERVICE MANUAL B-40 Through B-506 Broilers

INTRODUCTION 1-1

MODEL IDENTIFICATION 1-1

WARRANTY IMFOBMATION 1-1

PURPOSE 1-1

SERVICE CAUTIONS 1-1

SAFETY CAUTIONS 1-1

LEGS, STANDS AND CASTERS 1-2

IMPORTANT INSTALLATION NOTES 1-2

VENTILATION REQUIREMENTS 1-2

CLEANING 1-2

OPERATION 1-2

IDLE TIME 1-2

END OF SHIFT SHUTDOWN 1-3

ELEMENT/COLD WATER CAUTION 2-1

COMPONENT REPLACEMENT 3-1

INFINITE CONTROL SWITCHES 3-1

CONTACTORS 3-1

ELEMENT REPLACEMENT 3-1

PIVOT HOUSINGS 3-1

CAST IRON GRATES 3-2

GRATE INSTALLATION NOTES 3-2

TROUBLE SYMPTOM CHART 4-1

PARTS LISTS 5-1 - 5-2

WIRING DIAGRAM, B-40, B-406, 208, 240 VOLTS 6-1

WIRING DIAGRAM, B-44, B-446, 208, 240 VOLTS 6-2

WIRING DIAGRAM, B-50, B-506, 208, 240 VOLTS 6-3

PAGE 1-2 SERVICE MANUAL B-40 Through B-506 Broilers

LEG, STANDS AND CASTERS:

a.

Legs are provided, stands and

b. When casters are used, be sure the

stand casters are optional. Legs

two without locking brakes are in

must be installed to provide cooling

stalled at the rear and the two with

air to the lower end of the cabinet.

locking brakes at the front of the

Be sure that the adjustable feet are

stand.

used to level the broiler.

IMPORTANT INSTALLATION NOTES:

1.

Installation of power supply flex

2. Installation must be done by an

(Uquid-tite) conduits or power

experienced and licensed technician.

cords should use fittings that are

The installation must conform with

designed for water/grease resistant

local codes, or, in the absence of

0-rings to seal out contaminants

local codes, with the National Elec

from the broiler interior.

tric Code.

VENTILATION REQuirements :

Information on the construction and in-

Commercial Cooking Equipment”, NFPA 96-

stallation of ventilating hoods may be

1978, available from the National Fire

obtained from the “Standard from the In-

Protection Association, 470 Atlantic Ave-

stallation of Equipment from the Removal of

nue, Boston, Massachusetts 02210.

Smoke and Grease Laden Vapors from -

CLEANING

Detailed instructions on cleaning and maintenance can be found in the operators

guide supplied as part of the owners installation and operation manual.

OPERATION

1.

Place water (One quart minimum) in

2. Preheat the broiler for ten (10)

the drip pan(s) below the elements

minutes by setting the control dials

to catch the melted fat falling from

to HI. Then lower each dial to a

the meat being cooked. Note: These

lower setting that will give the

pans must be cleaned regularlyand

desired temperature for cooking the

at least one quart of water in them

specific meat product that is being

for efficient operation.

prepared.

IDLE TIME

During slow periods of operation where

Returning the unit to its cooking tempera-

The broiler is not being used, turn the

ture only takes a few minutes once the

Control(s) down to the LO position to con-

control(s) have been set back up.

Serve energy.

SERVICE MANUAL B-40 Through B-506 Broilers PAGE 1-1

INTRODUCTION

Wells electric Broilers are available in

counter-top and built-in versions with line

rated 208 and 240 Volt elements with Infi-

nite Control Switch temperature control

systems. KW ratings for the B-40 and B-

406 are 4.6, the B-44 and B-446 are 5.4,

and the larger B-50 and B-506 is 10.8.

All have removable cast iron cooking

grates nested within the tubular elements.

Each head assembly has a pivoted mount-

ing and safety locking mechanism to allow

the head to be lifted to a near vertical

position for ease in cleaning without dan-

ger of falling back to the cooking position.

MODEL IDENTIFICATION

The B-40 is a 24% inch wide by 23 ½ inch

deep countertop char broiler. The B-406

is the built-in version. The B-44 is a 19

7/16 inch wide by 29 9/16 inch deep coun-

tertop unit and the B-446 is the built-in

version. The B-50 is a 36 ½ inch wide by

29 ½ inch deep unit and the B-506 is the

built-in version.

PURPOSE

These electric counter-top and built-in

These Broilers cook various cuts of meat

broiler units are used to char broil meat

leaving a cosmetic char branding and a

products in commercial kitchen applications.

minimum of fat or grease on the meat.

SERVICE CAUTIONS:

Service should be performed only by a

are subject to high temperatures that may

qualified technician. Temperatures found

cause burns. Use caution when handling

in these broilers require caution to avoid

or servicing the broiler to avoid causing

any contact with components that

damage that may compromise safety.

SAFETY CAUTIONS:

1.

The tubular elements are relatively

4.

Allow grates to cool down to a safe

self cleaning and should never be

handling temperature before at

scraped with any abrasive tools.

tempting to remove them for cleaning.

2.

On B-40 and B-406 models the grate

5.

Always adjust the height of the

is nested from the top side of the

grates on the bottom nested units so

elements, this requires care in

that the top of the grate is above

handling the head assembly not to

the top of the elements so that there

raise the head too fast which can

can be no contact between elements

displace the grate if the head up-

and the meat being cooked.

ward movement stops suddenly.

3.

On B-44 through B-506 models the

6.

Never pour water over hot elements.

Grate(s) should be nested from the

Never subject heating elements to

bottom. These models have 4 bat-

caustic sauces or cleaning agents

wing bolts that mount to the grate

that may cause corrosion to element

castings tabs on each corner to

sheaths that may result in splits or

position the height of the grate

holes in the element sheath.

above the drip pan directly below

the elements.

SERVICE MANUAL B-40 Through B-506 Broilers PAGE 2-1

END OF SHIFT SHUTDOWH

Turn the control(s) to the OFF position, allow the

heat assembly to cool down to a safe handling

temperature before brushing and scraping

excess build-up from the grates. Raise the head

assembly for accessing the drip pan(s). Empty

the drip pan(s) into an approved disposal

receptacle. Turn off the circuit breaker that

supplies power to the broiler before attempting to

wash down the broiler. Clean the interior and

exterior of the broiler with a clean cloth and mild

solution of soap or detergent.

Rinse with a clean cloth and warm water. Wipe

dry with a dry clean cloth. Install the clean drip

pan(s) into the cavity inside the broiler. Fill the

pan with a minimum of one quart of water. Lower

the head assembly, turn on the circuit breaker

that supplies power to the broiler. The unit is now

ready for the next day or shifts, use.

Caution:

Never pour cold waster

directly on hot elements!

Possible injury may be

experienced an

d severe

damage to elements may occur.

SERVICE MANUAL B-40 Through B-506 Broilers PAGE 3-1

COMPONENT REPLACEMENT

Use standard practices associated with

3. Never attempt to adjust or

Electrical equipment. Use only O.E.M.

"Calibrate" Infinite Switches.

Replacement parts;

Always replace damaged or

malfunctioning Contactors rather

1.

Remove live power from broiler

than attempting cleaning.

before attempting any component

replacement.

4. Always compare overall lengths.

between new and old elements

2.

Support all electrical terminals when

because as elements age the flange

loosening or tightening connections

to flange lengths may change and

to avoid damage to component parts

cause warping of new elements.

such as elements and contactors.

INFINITE CONTROL SWITCHES

Always replace any push-on female Do not install mounting screws that are

terminals that do not fit tightly on the longer than 3/16" because the longer

male terminals of the control. Be sure that screws will extend into the body of the

the load wires are not connected to the control and damage it.

pilot terminal.

CONTACTORS

Use only O.E.M. replacement contactors Do not attempt to file or dress burned or

that are designed for the specific pitted contacts or clean sticking

application. Using Non O.E.M. Contactors armatures or contacts. Always replace

may cause additional problems and or contactors with any of, these problems.

liabilities.

ELEMENT REPLACEMENT

Never install "mixed voltage" (208 / 240) B-44. B446, B50, and B-506 units have 18

elements new or old in a head that is elements in each head assembly, none are

operated other than on the specified the loose fitting type. Do not mix voltage

voltage on the element sheath. Always or lengths that vary more than 1/16".

replace warped or cracked sheath Make sure all electrical connections are

elements with new elements. B-40 and B- tight, including the brass jumpers

406 Broilers have (4) "loose fitting" between terminals. Always support

elements in the center of the total of 24 terminals while tightening.

elements to allow for expansion when hot.

PIVOT HOUSINGS

Each broiler head assembly has a left and When replacing worn conductors, be sure

right pivot housing assembly (B-50 and B- to use the correct type and rated wire to

506 also have a common center pivot ensure safe and reliable operation. Do not

assembly). All power to energize elements attempt to patch or tape damaged wires.

is routed through these pivot assemblies. Always replace damaged wires.

Always replace "damaged" pivot housings.

PAGE 3-2 SERVICE MANUAL B-40 Through B-506 Broilers

CAST IRON GRATES

B-40 and B-406 Grates must be installed in the

top of the head assembly by inserting the rear

extensions through the elements from the top and

lowering the grate until it is nested between the

elements and the front web of the grate contacts

the front ends of the elements where they mount

to the front casting of the head assembly. With

this type of mounting the grate is raised any time

the head assembly is raised.

The larger B-44 through B-506 units can mount

the grates on top of the elements but must be

removed prior to raising the head assembly. A

more desirable way is to mount the grates below

the elements and head assembly, the grates

remain in their mounted on the drip pan location

when the head assembly is raised.

In this type of mounting, each grate is supported

below the elements using (4) wing stud (Feet)

bolts and (8) hex Jamnuts adjusted to give the

correct vertical protrusion above the elements.

The head of each wing stud is notched to allow the

studs to be installed from the bottom of the grate

on four ears at the end and sides of the grates, the

notches in the heads are then placed on top of the

rolled outer edge of the drip pan.

When adjusting overall height of the grates, a

spring loaded safety support rod must be able to

drop below the rear edge of the grate to allow the

head assembly to be lowered into the operating

position.

When the grate height adjustment is correct, the

safety support rod can be pulled forward as the

head assembly is raised enough to pull the rod

forward and then directed down behind the grate

rear edge as the head is lowered where the rod will

slide forward on top of the drip pan and below the

grate. When the adjustment allows this clearance,

the safety support-rod allows the head to be raised

an lowered without disturbing the grate or taxing

the pivots with the excessive weight of the grates.

SERVICE MANUAL B-40 Through B-506 Broilers PAGE 4-1

TROUBLE SYMPTOM CHART

PROBLEM PROBABLE CAUSE CORRECTIVE ACTION

NOT HOT

ENOUGH

GRATE IMPROPERLY

INSTALLED

HE-INSTALL GRATE TO ALLOW

PROPER ELEMENT TO GRATE HEIGHT.

HOT HOT

ENOUGH

WRONG VOLTAGE APPLIED TO

TERMINAL BLOCK. 208

APPLIED TO A 240V UNIT.

CHECK NAMEPLATE VOLTAGE

SPECIFICATIONS. IF WRONG

VOLTAGE, EXCHANGE UNIT FOR THE

CORRECT VOLTAGE UNIT.

NOT HOT

ENOUGH

HIGH RESISTANCE

CONNECTION (S)

CHECK FOR LOOSE TERMINAL, OR

BAD CONNECTION. CHECK CONTACTOR CONTACTS

FOR BURNED OR PITTED

CONTACT SET. CHECK ELEMENT

JUMPER CONNECTIONS.

GETS TOO HOT,

CAN'T CONTROL HEAT

DEFECTIVE INFINITE

CONTROL SWITCH

CHECK FOR STICKING CONTACTS IN

INFINITE CONTROL SWITCH.

GETS TOO HOT

CAN'T CONTROL HEAT

DEFECTIVE CONTACTOR,

CONTACTS DO NOT OPEN.

CHECK CONTACTOR CONTACTS WHEN

COIL NOT ENERGIZED. IF CLOSED,

REPLACE CONTACTOR.

TEMPERATURE

DOES NOT

CHANGE WHEN

CONTROL

SETTING IS

CHANGED

DEFECTIVE INFINITE

CONTROL SWITCH OR

CONTACTOR.

CHECK INFINITE CONTROL SWITCH FOR

CYCLING CONTACTS, IF NOT CHANGING

WHEN CONTROL SET HIGHER, REPLACE

CONTROL. IF CONTROL IS OK, CHECK

CONTACTOR CONTACTS, IF NOT

CYCLING, REPLACE CONTACTOR.

SOME

ELEMENTS

NOT HEATING

OPEN PHASE IN SUPPLY

CIRCUIT. OPEN ELEMENTS,

OPEN WIRE TO ELEMENTS.

CHECK ALL PHASES OF POWER SUPPLY

FOR NORMAL INPUT POWER, IP OK,

TURN OFF POWER AND MAKE

CONTINUITY CHECK OF ELEMENTS AND

WIRING.

INTERMITTENT

HEATING OF

SOME

ELEMENTS

LOOSE TERMINALS OR

WIRING, BAD CONTACTOR

CONTACT SET.

EXAMINE TERMINALS AND WIRING

CONNECTIONS FOR LOOSE OR DIRTY

CONNECTIONS. CHECK CONTACTOR FOR

DIRTY OR PITTED CONTACTS. REPLACE

CONTACTOR IF CONTACTS DEFECTIVE.

INFINITE

CONTROL

SWITCHES

FAIL AFTER

SHORT PERIODS

OF USE

OPEN CAPACITOR ACROSS

CONTACTOR COIL

TERMINALS.

REPLACE DEFECTIVE

(OPEN) CAPACITOR.

SERVICE MANUAL B-40 THROUGH B-506 BROILERS PAGE 5-1

PARTS LIST F/O FACTORY L/P=LOCAL A/R= AS REQUIRED

BROILER ORDER PURCHASE N/S= NOT SHOWN

ITEM PART

NUMBER NUMBER

COMPOMENT DESCRIPTION QTY NOTES

CABINET ASSEMBLY, B-40 1 F/O

CABINET ASSEMBLY, B-44 1 F/O

CABINET ASSEMBLY, B-50 1 F/O

52730 TOP ASSEMBLY, B-406 1

52747 TOP ASSEMBLY, B-446 1

52759 TOP ASSEMBLY, B-506 1

52727 COVER, FRONT, ELE. ASSEMBLY, B-40, B-406 1

52728 COVER, REAR, ELE. ASSEMBLY, B-40, B-406 1

52739

COVER, FRONT, ELE. ASSY.,

B-44, B-446, B-50*, B-506*

1

*2 Req.

B-50, 506

52740

COVER, REAR, ELE. ASSY.,

B-44, B-446, B-50*, B-506*

1

*2 Req.

B-50, 506

50001

JUMPER, ELE, LONG,

(16 B-44, B-50, Per head) (20 Per head B-40)

50002

JUMPER, ELE., SHORT,

(6 B-44, b-50, Per Head)(12 Per Head B-40)

50005 ELEMENT, 120V., 225W., B-40, B-406 20 240V UNIT

50006

ELEMENT, LOOSE FTG. 120V, 225W.,

B-40, B-406

4 240V UNIT

50007 ELEMENT, 104V., 225W., B-40, B-406 20 208V UNIT

50008

ELEMENT, LOSSE FTG. 104V., 225W.,

B-40, B-406

4 208V UNIT

50019

ELEMENT, 120V., 300W.,

B-44, B-446, B-50, B-506

18 240V UNIT

50020

ELEMENT, 104V., 300W.,

B-44, B-446, B-50, B-506

18 208V UNIT

52722 ELEMENT ASSY. & BASE, B-40, B-406, 208V 1

52723 ELEMENT ASSY. & BASE, B-40, B-406, 240V 1

82737

ELEMENT ASSEMBLY,

B-44, B-446, B-50*, B-506* 208V

1

*2 REQ.

B-50,506

52738

ELEMENT ASSEMBLY,

B-44, B-446, B-50*, B-506* 240V

1

*2 REQ.

B-50,506

PAGE 5-2 SERVICE MANUAL B-40 THROUGH B-506 BROILERS

PARTS LIST F/O= FACTORY L/P= LOCAL A/R= AS REQUIRED

BRILERS ORDER PURCHASE N/S= NOT SHOWN

ITEM PARTS

NUMBER NUMBER

COMPOMENT DESCRIPTION QTY NOTES

52729 ROD, SUPPORT, B-40, B-406 1

52741 ROD, SUPPORT, B-44, 446, 50*, 506* 1

*2 Req

B

-

50, 506

52840 BRACKET, PIVOT, LEFT, B-40-B-506 1

52841

BRACKET, PIVOT, RIGHT, B-40, 406, 44

446,50*, 506* *= 50 & 506 requires 2

1

2

B-50 &

B-506 (2)

52806 COVER, PIVOT BRACKET, LEFT OR RIGHT 2

53245 COVER, PIVOT, DOUBLE, B-50, 506 1

52329 HANDLE, HEAD ASSY. BROILERS *

2 Req

B-50, 506

52729 ROD, SUPPORT, B-40, 406 1

52428 SPRING, SUPPORT ROD, B-40 – 506 1

1 Per. Head Assy

54593 SWITCH, INFINITE CONTROL 2 208/240V

50371 KNOB, CONTROL 2

50516 LIGHT, SIGNAL, AMBER, B-40 2 208/240V

50131 TERMINAL BLOCK, 55A. B-40, B406 1

50412 TERMINAL BLOCK, 75A. B-50, B-506 1

57779

CONTACOTOR, 4 POLE 40A. 208V.,

B-44, B-446, B-50, B-506

2

57780

CONTACOTOR, 4 POLE 40A. 240V.,

B-44, B-446, B-50, B-506

2

55635 CAPACITOR, B-44, B-446, B-50, B-506 *

1 per contactor.

50516

LIGHT, INDICATOR, AMBER,

B-40, B-44, B-50

2

50385

LIGHT, INDICATOR, AMBER,

B-40, B-44, B-50

2

51023 PANEL, CONTROL 1 B-446

20563 LEG, 4 INCH, ADJUSTABLE * Set of 4

SERVICE MANUAL B-40 THROUGH B-506 BROILERS PAGE 6-1

WIRING DIAGRAM, B-40, B-406, 208, 240 Volt

PAGE .6-2 SERVICE MANUAL B-40 Through B-506 Broilers

Wiring Diagram, B-44, B-446, 208, 240 Volt.

SERVICE MANUAL B-40 Through B-506 Broilers PAGE 6-3

Wiring Diagram, B-50, B-506, 208, 240 Volt

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