Wells WG-2448G Installation Manual

SERVICE MANUAL

Revision

04/15/93

WG SERIES GAS GRIDDLES

Replaces Preliminary
Manual Dated 12/17/91

WELLS MANUFACTURING COMPANY

P.O. Box 280 VERDI, NV. 89439

PHONE: [phone]

FAX: [phone]

Part # 62453
10/10/95

Data sheets and text of this manual are representative of current production

CAUTION:

models as of 12/17/91. Specifications, Model Number designations and data are
subject to change at any time without notice!

When service is required to correct electrical or temperature complaints, always
refer service to a Factory Authorized Wells Service Agency or Authorized Sub
Servicer. For location of your nearest Servicer, refer to publication 37000 for a
complete listing of Factory Authorized Service Agency.

CAUTION: NEVER SUBMERGE ELECTRICAL EQUIPMENT
IN WATER. AVOID CONTAMINATING ELECTRICAL COM

PONENTS WITH MOISTURE WHEN CLEANING CABINET
SURFACES.

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

in this appliance) for safety. Use proper cau-
tions when power must be restored while mak-
ing voltage or current measurements to avoid

the possibility of electrical shock!

NOTE: The statement above is a general warning and may not
apply to the appliance covered in this manual or gas products
that do not have power connected to the appliance.

THIS MANUAL HAS BEEN FORMATED FOR USE BY WELLS
FACTORY AUTHORIZED SERVICE AGENCY TECHNICIANS

01/10/92 Rev.__

SERVICE MANUAL WG-xxG Series Gas Griddles TABLE OF CONTENTS
INTRODUCTION 1-1

INSTALLATION REQUIREMENTS 1-1
INSTALLATION CLEARANCES 1-1
VENTING REQUIREMENTS 1-1
GAS PIPING REQUIREMENTS:
PRESSURE REGULATOR 1-1
GAS PIPING PRESSURE TESTING 1-2
GAS SUPPLY FLOW/VOLUME REQUIREMENT 1-2
LEVELING GRIDDLE 1-2
WARRANTY STATUS 1-2
WARRANTY NOTICE 1-3
OPERATION:
PURPOSE 2-1
OPERATION 2-1
CLEANING 2-1
SEASONING 2-1
DAILY MAINTENANCE AND CARE 2-1
INSTALLATION:
TESTING GAS PRESSURE 3-1
PURGING RAW GAS 3-1
LIGHTING PILOTS 3-1
PILOT FLAME ADJUSTMENT 3-1
MAIN BURNER AIR/FUEL MIXTURE 3-1
SETTING ZONE THERMOSTATS 3-2
REVIEW OPERATION OF GRIDDLE 3-2

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SERVICE MANUAL WG-xxG Series Gas Griddles TABLE OF CONTENTS

SERVICE:
CONTROL CALIBRATION REQUIREMENT 4-1

IMPORTANT CALIBRATION CAUTION 4-1
THERMOSTAT CAUBRATION TOOL 4-1
PLACEMENT OF TEST PYROMETER OR THERMOMETER 4-1
INITIAL HEATING CYCLE 4-1
CAUBRATION 4-1
REPLACEMENT PARTS CAUTIONS 4-2
CONTROL THERMOSTATS 4-2
REPLACING GAS VALVES 4-2
REPLACING PILOTS AND THERMOPILES 4-3
REPLACING PILOT ORIFICES 4-3
REPLACING BURNER ORIFICES 4-3
REPLACING REGULATOR ASSEMBLY 4-3
MAIN BURNER SERVICE 4-3
PILOT FLAME AND MAIN BURNER ADJUSTMENTS 4-4
THERMOPILE OUTPUT VOLTAGE 4-4
THERMOSTAT CONTACT TESTING 4-5
THERMOSTAT REPLACEMENT PART 4-5
TROUBLESHOOTING GUIDE 5-1
COMPONENT PICTORIAL 5-4
COMPONENT ITEM CHART 6-1
WIRING DIAGRAM WG-2424G 6-3
WIRING DIAGRAM WG-2436G, WG-3036G, WG-3048G 6-4

iii

SERVICE MANUAL WG-xxG Series Gas Griddles Introduction PAGE 1-1

INTRODUCTION

Wells Heavy Duty, High Performance WG Series Gas
Griddles are designed to cook a full range of food
items, from eggs to steaks. Grills effectively at both
low and high temperatures for maximum versatility.
Fully controllable from 200" F. to 450' F. These Gas
Griddles are available in Natural Gas and Propane
versions.

Chrome Plated and Grooved surface tops are options.
Four basic countertop griddles are available as,
WG2424G, a 24" x 25%'* Cooking Surface, 50,000
BTU per hour rated.

INSTALLATION REQUIREMENTS

WG Series Griddles are design certified for
installation only on a non-combustible counter
top. Formica or other non-metallic laminate over
a combustible material is not considered non-
combustible.

WG2436G, a 36" x 25%" Cooking Surface, 75,000
BTU per hour rated. WG3036G. a 36" x 30" Cooking
Surface, 75,000 BTU per hour rated. WG3048G. a
48" x 30" Cooking Surface, 100,000 BTU per hour
rated.

These new Gas Griddles utilize a snap action control.
thermostat. No flame modulation is employed and no
bypass flame adjustments are required like former
models of Wells Gas Griddles used.

Caution: Do not operate griddle without legs
installed. Four inch high sanitary legs are
provided with each Griddle and must be installed
prior to operating the appKance.

INSTALLATION CLEARANCES

A minimum of 3" between the rear and side panels of
the griddle and non-combustible walls adjacent to the
griddle. A minimum of 3 feet of open space in front of
the Griddle must be maintained for space to service
the Griddle.

VENTILATING REQUIREMENTS

Venting for the Griddle must comply with the
applicable portion of the Standard for the Installation
of Equipment for the Removal of Smoke and Grease
Laden Vapors from Commercial Cooking Equipment,

GAS PIPING REQUIREMENTS

PRESSURE REGULATOR

Each Griddle is shipped with a pressure regulator
matching the fuel type that the griddle and its gas
valves, pilots, and burner orifices are designed to
operate on.

GAS PIPING REQUIREMENTS Continued on next page.

The area surrounding the Griddle must be kept free
and clear of loose combustible materials. A partial list
would include: Rags, Paper items. Mops or electrical
cords.

N.F.P.A. # 96. The venting of the Griddle must
not in any way be obstructed or obstruct the flow
of combustion air for proper combustion.

The Regulator must be installed with the outlet
connection connected to the inlet pipe of the
Griddle. Failure to install or reversing the
connections of the Regulator will void the
warranty and may result in a hazardous condition
and or damage the gas valves.

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PAGE 1-2 SERVICE MANUAL WG-xxG Series Gas Griddles Introduction

WELLS MANUFACTURING COMPANY STANDARD LIMITED

GAS PIPING REQUIREMENTS Cont

Supply piping should be a minimum of % inch
black iron pipe with a sediment trap (drip leg)
consisting of a pipe tee, 4" nipple with cap to
prevent dirt from entering the control valves

Do not use Teflon Tape or Teflon pipe Compound
on the inlet connections, use a good quality pipe
thread compound. Apply pipe dope sparingly to
the male threads only.

(Consult local codes and ordinances for
guidance for this requirement, or in the
absence of local codes, use the National Gas
Code ANSI Z223.1 and NFPA No. 54).

Be sure all gas piping is clean and free of
obstructions, dirt, and piping compounds. A
manual shut-off valve between the % inch feed
pipe and the system manifold should be installed

Pipe thread compounds should be of a type that

for safety when servicing the griddle.
is resistant to the action of LP (Liquid Petroleum
Gases).

GAS PIPING PRESSURE TESTING

Make sure the supply piping system has been
pressure tested before the regulator and griddle
is connected. If the system must be re-tested, be
sure the regulator is isolated by a manual shut-off

The main system piping must be capable of

supplying Griddle with sufficient volume/flow of

fuel for maximum input (Operational)

requirements.
valve to prevent damage to the regulator and
griddle gas valves.

Always check piping joints for leaks with a soap
and water or other approved leak detection
solution after any pipe connections are disturbed
or changed.

NOTE:

The maximum inlet pressure from the

supply piping should not exceed % P.S.I.

(14" W.C.). Pressures above this limit will

damage the regulator and gas valves hi

the unit.

GAS SUPPLY FLOW/VOLUME REQUIREMENT

When testing for adequate gas pressure, be sure all
other gas appliances that utilize the same source
piping are in operation with burners "ON" for an
accurate operational condition.

LEVELING GRIDDLE

Make sure the griddle is level before connecting to the
gas supply piping.

WARRANTY STATUS

WARRANTY APPLIES TO ALL WG SERIES GAS GRIDDLES HAVE
COVERAGE FOR PARTS AND LABOR FOR ONE -YEAR FROM THE
DATE OF INITIAL INSTALLATION OR FIRST TIME OPERATION OR
START-UP. OR, 18 MON THS FROM THE DATE OF MANUFACTURE.

If other appliances are not consuming gas when
testing for pressure, the test may be inaccurate if flow
volume is marginal in the system supply piping.

Re-check the leveling after piping connections

are completed to avoid improper cooking on a

slanted surface.

2

Service Manual WG-xxG Series Griddles Introduction PAGE 1-3

WARRANTY SERVICE PROVIDED AT THE CUSTOMERS JOB SITE IS LIMITED TO A

60 MILE RADIUS FROM THE CLOSEST WELLS AUTHORIZED SERVICE COMPANY
LOCATION AND MUST BE PERFORMED DURING SERVICE
WORKING HOURS. ADDITIONAL TRAVEL TIME, MILEAGE, AND LABOR CHARGES
ARE THE END USERS RESPONSIBILITY. CALIBRATION 60 DAYS
FROM THE DATE OF INSTALLATION. SEE THE WARRANTY STATEMENT
PUBLISHED IN ITEM NUMBER 37001 (WARRANTY STATEMENT AND SERVICE
AGENCY LISTING) FOR ADDITIONAL INFORMATION ON WARRANTY LIMITATIONS

NOTICE:

Manufacturer's warranty is in effect only when the
griddle is installed by qualified personnel and
operated in accordance with the instructions in
the ow ners guide and local ordinances or, in the
absence

of local codes, the National Fuel Gas Code,

A.N.S.I. Z223.1-1984 or the latest A.N.S.I. Z223.1

edition. Wells Mfg. Co. is not liable for any

damage resulting from failure to comply with this

notice.

3