Wolf Appliance Company ML-767589, ML-767590 User Manual

OWNER'S MANUAL

INSTALLATION & OPERATION

WKGHD & WKGHC

GAS

CONVECTION OVENS

MODELS

WKGHD ML-767589

WKGHC ML-767590

For additional information on Wolf Range or to locate an authorized parts

and service provider in your area, visit our website at www.wolfrange.com

WOLF RANGE
DIVISION OF ITW FOOD EQUIPMENT GROUP, LLC

WWW.WOLFRANGE.COM

P.O. BOX 696

LOUISVILLE, KY 40201-0696

FORM 30982 Rev. F (Dec. 2007)

IMPORTANT FOR YOUR SAFETY

THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL GAS
EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD START-UP AND
ADJUSTMENTS OF THE EQUIPMENT COVERED BY THIS MANUAL.

POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE
EVENT THE SMELL OF GAS IS DETECTED. THIS INFORMATION CAN BE OBTAINED
FROM THE LOCAL GAS SUPPLIER.

IMPORTANT

IN THE EVENT A GAS ODOR IS DETECTED, SHUT DOWN
UNITS AT MAIN SHUTOFF VALVE AND CONTACT THE
LOCAL GAS COMPANY OR GAS SUPPLIER FOR
SERVICE.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER
FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF
THIS OR ANY OTHER APPLIANCE.

Improper installation, adjustment,

alteration, service or maintenance can cause property
damage, injury or death. Read the installation, operating
and maintenance instructions thoroughly before
installing or servicing this equipment.

IN THE EVENT OF A POWER FAILURE, DO NOT ATTEMPT
TO OPERATE THIS DEVICE.

© THE WOLF RANGE COMPANY LLC 1996

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Installation, Operation, and Care of

WKGHD & WKGHC

GAS CONVECTION OVENS

KEEP THIS MANUAL FOR FUTURE USE

GENERAL

Your Convection Oven is produced with quality workmanship and material. Proper installation, usage, and
maintenance will result in many years of satisfactory performance.

It is suggested that you thoroughly read this entire manual and carefully follow all of the instructions provided.

The WKGHD Gas Convection Oven is a single cavity oven and features a solid state thermostat, 1-hour dial
timer, and five racks as standard equipment. Additional oven racks are optional. Each oven is equipped
with a 25,000 BTU/hr burner and a
interior.

Model WKGHC has different controls than model WKGHD.

Two single ovens can be ordered with a stacking kit for mounting one oven on top of the other.

A single oven may be installed on an open stand with lower storage rack (optional).

1

/2 HP (0.37 kw) electric motor. The oven comes standard with porcelain

Roast & Gentle Rack #

Model Thermostat Timer Hold Bake Cook Times

WKGHD Solid State 1-Hour Dial

WKGHC Built before October 1999 Electronic Electronic X X

WKGHC Built after October 1999 Programmable Programmable X X

INSTALLATION

Before installing, verify that the electrical service and type of gas supply (natural or L.P.) agree with the
specifications on the oven rating plate, located on the inside of the top front cover. If the supply and
equipment requirements do not agree, do not proceed with installation. Contact your dealer or Wolf Range
Company immediately.

UNPACKING

This oven was inspected before leaving the factory. The transportation company assumes full responsibility for
safe delivery upon acceptance of the shipment. Immediately after unpacking the oven, check for possible
shipping damage. If this oven is found to be damaged, save the packaging material and contact the carrier within
15 days of delivery.

Do not use the door or its handle to lift the oven.

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LOCATION

The equipment area must be kept free and clear of combustibles. Maintain clearances from combustible or
non-combustible construction for at least 3" (7.6 cm) from the side and 3" (7.6 cm) from the back of the oven.
The installation location must allow adequate clearances for servicing and proper operation.

The oven must be installed so that the flow of combustion and ventilation air will not be obstructed. Adequate
clearance for air openings into the combustion chamber must be provided. Make sure there is an adequate
supply of air in the room to allow for that required for combustion of gas at the oven burners.

INSTALLATION CODES AND STANDARDS

In the United States of America:

1. State and local codes.

2. National Fuel Gas Code, ANSI/Z223.1/NFPA #54 (latest edition). Copies may be obtained from The
American Gas Association, Inc., Accredited Standards Committee Z223 @ 400 N. Capital St. NW,
Washington, DC 20001 or the Secretary Standards Council, NFPA, 1 Batterymarch Park, Quincy, MA
02169-7471.

NOTE: In the Commonwealth of Massachusetts,

All gas appliances vented through a ventilation hood or exhaust system equipped with a damper or with a
power means of exhaust shall comply with 248 CMR.

3. Vapor Removal From Cooking Equipment

, NFPA-96 (latest edition). Copies may be obtained from The

National Fire Protection Association, Batterymarch Park, Quincy, MA 02169-7471.

4.

National Electrical Code, ANSI/NFPA-70 (latest edition). Copies may be obtained from The National Fire
Protection Association, Batterymarch Park, Quincy, MA 02169-7471.

In Canada:

1. Local codes.

2. CSA B149.1 Natural Gas and Propane Installation Code.

3. CSA C22.1 Canadian Electric Code (latest edition).

The above are available from the Canadian Standard Association, 5060 Spectrum Way, Suite 100, Mississauga,
Ontario, Canada L4W 5N6.

INSTALLING BASIC OVEN

The basic oven must be installed on 4" (10 cm) or 6" (15 cm) adjustable
legs for counter installation or be mounted on a modular stand. Installations
on concrete bases or other supports restricting air circulation underneath
the oven are not advisable and may void the warranty.

Ovens Mounted on Casters

Ovens mounted on casters must use a flexible connector (not supplied
by Wolf Range) that complies with the Standard for Connectors for
Movable Gas Appliances, ANSI Z21.69 • CSA 6.16 and a quick­disconnect device that complies with the Standard for Quick-Disconnect
Devices for Use With Gas Fuel, ANSI-Z21.41 • CSA 6.9. In addition,
adequate means must be provided to limit movement of the appliance

CONNECT

GAS LINE

STRAIN RELIEF

HERE

Fig. 1

PL-53563

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without depending on the connector and the quick-disconnect device or its associated piping to limit appliance
movement. Attach the restraining device at the rear of the oven as shown in Fig. 1.

If disconnection of the restraint is necessary, turn off the gas supply before disconnection. Reconnect this
restraint prior to turning the gas supply on and returning the oven to its installation position.

Separate instructions for installing casters to the oven are included with the casters.

Note: If the oven is installed on casters and is moved for any reason, it is recommended that the oven be
releveled front to back and side to side for even baking.

Assembling the Legs to the Single Oven

The 4" (10 cm) or 6" (15 cm) legs are packed inside the oven during shipment and must be installed on the bottom
of the oven. Place the oven on its left side, being careful to avoid scratching the finish. The gas pipe connection
protrudes beyond the back; provide for this when oven is tipped back by resting it on suitable spacers (2 x 4's
etc.). Thread each of the four leg assemblies into the holes provided on the bottom corners of the oven. Carefully
raise the oven to its normal upright position.

Assembling the Chimney to the Single Oven

Remove the chimney from inside the oven cavity and use the screws

CHIMNEY

provided to fasten the chimney to the top rear of the oven (Fig. 2). The
flanges on the chimney are to be positioned over the top cover.

Assembling the Oven to the Stand

Position the oven on its back, taking care not to scratch or damage it. The
gas pipe connection protrudes beyond the back; provide for this when the
oven is tipped back by resting it on suitable spacers (2 x 4's). Install the two

Fig. 2

PL-52240

locating studs (included in the stand carton) into the screw plates on the
underside of the oven (Fig. 3).

Attach each of the four leg assemblies to the bottom of the stand with the

FRONT OF TOP OVEN

12 bolts and lockwashers (3 per leg). If casters are used instead of legs,
put fixed casters in rear and swivel casters in front using 12 bolts and
lockwashers (3 per caster). Mount the oven on top of the stand.

Assembling Stacked Ovens

LOCATING STUDS

BOTTOM

KNOCK OUT WELDED PLATE
FOR FLUE EXTENSION INSTALLATION

Determine which oven will be on the bottom and place it on its left side,

3

being careful to avoid scratching the finish. Install the four 16
legs, using the 24 bolts and lockwashers provided (6 per leg). Remove the

/4" (42.5 cm)

REAR OF TOP OVEN

PL-52992

two 7/16" (1.1 cm) knockouts on each side of the top cover and place oven
in upright position at installation location. Turn the adjustable feet in or out

Fig. 3

to level the oven front-to-back and side-to-side (refer to LEVELING, page

6).

Remove right side panels from both ovens. Remove welded plate from bottom of upper oven (Fig. 3). Install
the two locating studs (included in the leg stack set) into screw plates on underside of upper oven (Fig. 3).
Place upper oven on top of lower oven using the locating studs.

Remove flue extension from upper oven. Install long flue extension into existing right-angled flue extension
in lower oven. Attach long flue extension to wall of upper oven using screws provided. Secure chimney to
roof of upper oven (Fig. 4).

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Install right side panels on both ovens. Connect the piping between
the top oven and bottom oven. Pipe joint compound must be resistant
to the action of propane gases.

CHIMNEY

The manual gas valve at the bottom of the control panel should remain
off until all electrical connections are made and the ovens are checked

LONG FLUE
EXTENSION

or used.

RIGHT ANGLED
FLUE EXTENSION

LEVELING

Once the oven is in its permanent position, place a carpenter's level
on the oven rack. If the oven is installed on legs, turn the adjustable
feet in or out to level oven front-to-back and side-to-side. If the oven

PL-52221

is installed on casters, loosen set screws and turn casters in or out to
level oven front-to-back and side-to-side. Retighten set screws after

Fig. 4

leveling.

ELECTRICAL CONNECTIONS

Electrical and grounding connections must comply with the applicable portions

of the National Electrical Code and/or other local electrical codes.

Appliances equipped with a flexible electric supply cord are provided with a
three-prong grounding plug. It is imperative that this plug be connected into a properly
grounded three-prong receptacle. If the receptacle is not the proper grounding type, contact an
electrician. Do not remove the grounding prong from this plug.

The 120 volt models are equipped with a cord and plug.

Refer to electrical wiring diagram located inside the right side panel; remove control panel for access.

Do not turn the power supply on until after the gas connections have been made and checked for leaks.

ELECTRICAL DATA

Minimum Circuit Ampacity

Model Volts Hertz Phase Maximum Protective Device

AMPS

120 60 1 15

WKGHD 200-240 50 1 15

208-240 60 1 15

WKGHC

120 60 1 15

200-240 50/60 1 15

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