Garland GAS PIZZA OVENS User Manual

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INSTALLATION, OPERATING

& SERVICE INSTRUCTIONS

FOR THE

GARLAND GPD SERIES GAS PIZZA OVENS

FOR YOUR SAFETY

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

WARNING:

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

THIS EQUIPMENT.

PLEASE READ ALL SECTIONS OF THIS MANUAL AND RETAIN FOR FUTURE REFERENCE.

THIS PRODUCT HAS BEEN CERTIFIED AS COMMERCIAL COOKING EQUIPMENT AND MUST BE INSTALLED BY PROFESSIONAL PERSONNEL AS SPECIFIED.

IN THE COMMONWEALTH OF MASSACHUSETTS THIS PRODUCT MUST BE INSTALLED BY A LICENSED PLUMBER OR GAS FITTER. APPROVAL NUMBER: G-1-07-05-28

For Your Safety:

Post in a prominent location, instructions to be followed in the event the user smells gas. This information shall be obtained by consulting your local gas supplier.

Users are cautioned that maintenance and repairs must be performed by a Garland authorized service agent using genuine Garland replacement parts. Garland will have no obligation with respect to any product that has been improperly installed, adjusted, operated or not maintained in accordance with national and local codes or installation instructions provided with the product, or any product that has its serial number defaced, obliterated or removed, or which has been modified or repaired using unauthorized parts or by unauthorized service agents. For a list of authorized service agents, please refer to the Garland web site at http://www.garland-group.com.The information contained herein, (including design and parts specifications), may be superseded and is subject to change without notice.

Continuous product improvement is a Garland policy, therefore design and specifications are subject to change without notice.

GARLAND COMMERCIAL INDUSTRIES

GARLAND COMMERCIAL RANGES,

Enodis UK LTD.

185 East South Street

LTD.

Swallowfield Way, Hayes, Middlesex UB3 1DQ ENGLAND

Freeland, Pennsylvania 18224

1177 Kamato Road, Mississauga, Ontario L4W 1X4

Telephone: 081-561-0433

Phone: (570) 636-1000

Fax: 081-848-0041

CANADA

Fax: (570) 636-3903

 

Phone: 905-624-0260

 

 

 

 

Fax: 905-624-5669

 

Part # 1844063 (08/06)

Page 1

Part # 1844063 (08/06)

© 2005 Garland Commercial Industries, Inc.

IMPORTANT INFORMATION

WARNING:

This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Installation and servicing of this product could expose you to airborne particles of glass wool/ ceramic fibers. Inhalation of airborne particles of glass wool/ceramic fibers is known to the State of California to causes cancer. Operation of this product could expose you to carbon monoxide if not adjusted properly. Inhalation of carbon monoxide is known to the State of California to cause birth defects or other reproductive harm.

Keep appliance area free and clear from combustibles

Page 2

Part # 1844063 (08/06)

TABLE OF CONTENTS

Important Information . . . . . . . . . . . . . . . .2

Dimensions And Specifications

GPD Series . . . . . . . . . . . . . . . . . . . . . . . . 4

Installation . . . . . . . . . . . . . . . . . . . . . . . . 5

Rating Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Gas Connections . . . . . . . . . . . . . . . . . . . . . . . 5

Installation Clearances . . . . . . . . . . . . . . . . . . . 6

Preparation: . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Ventilation:. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Air Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installing Under Ventilation Canopy: . . . . . . . . 7

Installing With Direct Ventilation . . . . . . . . . . 7

Assembly Instructions . . . . . . . . . . . . . . . 7

Leg Installation. . . . . . . . . . . . . . . . . . . . . . . . . 7

Hearth Installation . . . . . . . . . . . . . . . . . . . . . . 7

Double Deck Assembly. . . . . . . . . . . . . . . . . . . 8

Gas Connection:. . . . . . . . . . . . . . . . . . . . . . . . 8

Adjustments. . . . . . . . . . . . . . . . . . . . . . . . 9

Gas Pressure Adjustments: . . . . . . . . . . . . . . . . 9

Flame & Air Mixture Adjustment: . . . . . . . . . . 9

By-passFlame Adjustment: . . . . . . . . . . . . . . . 10

Calibration: . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Flame Diverters . . . . . . . . . . . . . . . . . . . . . . . .11

Operation . . . . . . . . . . . . . . . . . . . . . . . . .11

Break-in:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Lighting/shutdown Instructions:. . . . . . . . . . . 12

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 12

Oven Exterior: . . . . . . . . . . . . . . . . . . . . . . . . 12

Oven Interior:. . . . . . . . . . . . . . . . . . . . . . . . . 12

Core Plates:. . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Troubleshooting Guide . . . . . . . . . . . . . . 13

Part # 1844063 (08/06)

Page 3

DIMENSIONS AND SPECIFICATIONS GPD SERIES

Ratings shown are for natural gas installations up to 2000 feet (610m) above sea level. BTU input ratings must be de-ratedfor high altitude installations.

Specify altitude of product if over 2000

24-21/32"

[626mm]

feet (610m)

 

 

 

 

This product is not approved for residential

 

 

 

 

use

 

 

23-3/8"

 

 

[594mm]

 

 

 

 

 

 

 

Installation Notes:

 

 

 

 

 

14-1/2"

 

 

 

Non-Combustible&

 

 

[368mm]

Combustible Wall

 

 

 

 

 

 

Clearances

 

 

 

 

 

 

 

 

 

Sides

Back

 

 

 

 

 

 

 

 

 

 

 

 

1” (25mm)

6” (152mm)

 

 

 

 

 

Entry Clearance:

 

 

24 -

 

21/32"

 

 

Crated

Uncrated

 

 

 

 

[626mm]

 

 

 

35”

26”

 

 

 

 

 

 

 

 

 

(889mm)

(660mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Manifold

 

 

 

 

 

31"

Operating Pressure:

 

 

 

 

[787mm]

Natural

Propane

 

 

 

 

 

 

 

 

 

 

 

 

 

6” WC

10” WC

 

 

 

 

 

 

 

 

 

(15mbar)

(25mbar)

 

 

 

 

 

 

 

 

 

 

 

 

INPUT SPECIFICATIONS

Natural Or Propane

MODEL

BTU/HR

KW

GAS

INLET

 

 

 

 

 

 

 

GPD48

96,000

28.1

3/4" N.P.T.

 

 

 

 

GPD60

122,000

35.7

3/4" N.P.T.

 

 

 

 

GPD48-2

192,000

56.2

1" N.P.T.

 

 

 

 

GPD60-2

244,000

71.4

1" N.P.T.

 

 

 

 

DIA6"

[152mm]

DIA6"

[152mm]

3/4"N.P.T. [19mm] GASINLET

REAR&SIDE

GASINLET

74-1/32"[1880mm]

23-3/8"

51-7/8"[594mm] [1318mm]

DECK

36-1/2"

28-1/2"[927mm] [724mm]

DECK

67-5/32"[1705mm]

53"

[1346mm]

45"

[1143mm] DECK

7-21/32"[195mm]

3"

[76mm]

7-15/16"

[201mm] 45-1/4"12-1/2" [1149mm] [318mm]

8" [203mm]

MODEL

Interior Dimensions: In (mm)

Exterior Dimensions In (mm)

 

 

 

 

 

 

 

NUMBER

W

H

D

W

H (w/NSF legs)

D

 

 

 

 

 

 

 

GPD48

48 (1220)

8 (203)

36 (914)

63 (1600)

52-3/4(1340)

45-1/4(1149)

 

 

 

 

 

 

 

GPD60

60 (1524)

8 (203)

36 (914)

75 (1905)

52-3/4(1340)

45-1/4(1149)

 

 

 

 

 

 

 

GPD48-2

48 (1220)

8 (203)

36 (914)

63 (1600)

62-1/2(1588)

45-1/4(1149)

 

 

 

 

 

 

 

GPD60-2

60 (1524)

8 (203)

36 (914)

75 (1905)

62-1/2(1588)

45-1/4(1149)

 

 

 

 

 

 

 

Page 4

Part # 1844063 (08/06)

INSTALLATION

1.Damage Check: check carton or crate for possible damage incurred in shipping. After carefully uncrating, check for “concealed” damage. Report any damage immediately to your carrier.

2.The correct type of gas for which the unit was manufactured is noted on the rating plate, and this type of gas must be used.

3.The gas pressure must be checked when the unit is installed, to ensure that the unit gas pressure is the same as specified on the rating plate. If necessary pressure adjustments can be made at the pressure regulator, supplied on each unit.

4.Have a qualified gas technician check the gas pressure to make certain that existing gas facilities (meter, piping, etc.) will deliver the BTU’s of gas required at the unit with no more than ½” water column pressure drop. When checking pressure, be certain that all the equipment on same gas line is turned to the “ON” position.

5.Make certain that the new piping, joints and connections have been made in a clean manner and have been purged, so that the piping compound, chips, etc will not clog pilots, valves and / or controls. Use pipe joint sealant that is certified for use with LP gas.

6.WARNING; check gas connections for leaks, using soap solution or similar means. DO NOT CHECK WITH AN OPEN FLAME.

Rating Plate

All burner-inputratings are shown on the serial plate located on the right side panel of the appliance.

When corresponding with the factory or your local authorized factory service center regarding service problems or replacement parts, be sure to refer to the particular unit by the correct model number (including the prefix and su x letters and numbers) and the warranty serial number. The rating plate a xed to the unit contains this information.

We suggest installation, maintenance and repairs should be performed by your local authorized service agency listed in your information manual pamphlet.

In the event you have any questions concerning the installation, use, care or service of the product, write or call our Product Service Department.

This product must be installed by professional personnel as specified. Garland/U.S. Range products are not approved or authorized for home or residential use, but are intended for commercial applications only. Garland / U.S. Range will not provide service, warranty, maintenance or support of any kind other than in commercial applications.

Gas Connections

The inlet manifold size for connection to the main gas supply is ( ) ¾” NPT inlet for each deck.

The importance of proper installation of Commercial Gas cooking Equipment cannot be over stressed. Proper performance of the equipment is dependent, in great part, on the compliance of the installation with the manufacturer’s specifications. Installation must conform to local codes with the Nation fuel code, ANSI Z . , Natural Gas Installation code, CAN/CGA-B . ,or the Propane Installation code,CAN/CGA-B . ,as applicable, including:

1.The appliance and its individual shut-ovalve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of ½ psi (3.45 kPa).

2.The appliance must be isolated from the gas supply piping system by closing its individual manual shut-ovalve during any pressure testing of the gas supply piping system at test pressures equal to or less than ½ psi (3.45 kPa).

Before assembly and connections, check gas supply.

A.The type of gas for which the unit is equipped is stamped on the data plate located behind lower front panel. Connect a unit stamped “NAT” only to natural gas; connect those stamped “PRO” only to propane gas.

Part # 1844063 (08/06)

Page 5

INSTALLATION Continued

B.If it is a new installation, have gas authorities check meter size and piping to assure that the unit is supplied with su cient amount of gas pressure required to operate the unit.

C.If it is additional or replacement equipment, have gas authorities check pressure to make certain that existing meter and piping will supply fuel at the unit with not more than ½” water column pressure drop.

NOTE: When checking pressure be sure that all other equipment on the same gas line is on. A pressure regulator is supplied with GARLAND Pizza Ovens. Regulator is preset to deliver gas at pressure shown on the rating plate.

Installation Clearances

Minimum clearance for combustible and NonCombustible Construction : ” ( mm) sides and” ( mm) rear. Suitable for installation on combustible floors. Legs must be installed.

Preparation

1.Carefully remove unit from carton or crate. Burner tie wires and other packing material should be removed from units. On stainless steel units, the protective material covering the stainless steel should be removed immediately after the unit is installed.

2.This unit must be mounted on the factory-suppliedlegs when installed. Refer to section titled LEG INSTALLATION for details.

3.Provide adequate clearances for proper operation and servicing of the appliance.

4.For your safety: keep the appliance area free and clear from combustibles.

5.These units must be installed under an adequate ventilation system. Refer to sections titled “Ventilation” and “Air Supply” for further instructions.

Ventilation

This appliance must be installed in a location in which the facilities for ventilation permit satisfactory combustion of gas and proper venting. Proper ventilation is imperative for good operation of the appliance. The ideal method of ventilating equipment is the use of a properly designed ventilating canopy, which should extend at least ”/ mm beyond all sides of the appliance (except against the wall if the canopy is a wall installation). This is usually part of a mechanical exhaust system

Air Supply

1.It is necessary that su cient room air ingress be allowed to compensate for the amount of air

removed by

any ventilating system.

Otherwise

a subnormal

atmospheric pressure

will occur,

a ecting the appliance operation adversely and causing undesirable working conditions.

2.Appliances shall be located so as not to interfere with proper circulation of air within the confined space. All gas burners and pilots require su cient air to operate.

3.Large objects should not be placed in front of the appliance, which might obstruct the airflow through the front. Do not obstruct the flow of combustion and ventilation air.

4.Do not permit fans to blow directly at the appliance, and wherever possible, avoid open windows adjacent to the appliance sides and back; also wall type fans which create air cross-currentswithin the room.

DRAFT DIVERTER

FLUE CAP

Page 6

Part # 1844063 (08/06)

INSTALLATION continued

Less than 10 feet (3 meters)

More than 10' (3 meters)

2' (60cm) Min.

3' (90cm) Min.

3' (90cm) Min.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Termination Less than 10 feet (3 meters) from ridge

Termination More than 10 feet (3 meters) from ridge

Installing Under Ventilation Canopy:

Too strong a pull through the exhaust system will pull heat out of the oven too rapidly and cause uneven baking (strong bottoms and light tops).

All ovens, operating under a ventilating canopy should be equipped with a canopy flue diverter assembly (supplied to o set too strong a pull.

Installing with Direct Ventilation

Wherever a direct flue is unavoidable, it is necessary that:

1.The draft diverter shipped with the oven is installed.

2.An adequately sized draft regulator (barometric damper) must be installed in the flue line as close to the oven connection as possible.

An adequately sized prefabricated metal vent should rise at least feet ( m) above the roof of the building in which it is installed, or feet ( m) above any proximate higher structure, and should be equipped with a well designed vent cap.

Never, under any circumstances, install a damper or place steel wool in an oven flue.

ASSEMBLY INSTRUCTIONS

Leg Installation

On single deck units, tip oven section units back. On double-deckunits, tip lower oven section ONLY on its back. Each leg is secured with four / ” ( mm) hex head bolts, threaded into nuts located on the underside of the base angle. When both front legs are installed, lift and block up rear of unit. Install rear legs.

Hearth Installation

NOTE: Because of the weight of the hearth plates, be very careful to avoid injury to yourself and to shelf joint edges, when sliding shelf halves into the oven.

To install hearth core plates or steel hearth assembly, proceed as follows:

Part # 1844063 (08/06)

Page 7

ASSEMBLY INSTRUCTIONS Continued

1.Slide the wooden frame out of the oven.

2.Before installing the hearth core plates or steel hearth assembly, be sure that the bottom heat deflectors are properly positioned with the treaded side (bumps) in the up position.

3.If the oven is supplied with a steel hearth assembly, place the hearth spacers (with the flat side in the up position) on the extreme left and right sides of the oven resting on the heat deflectors. Making sure the hearth spacers are not disturbed, slide the steel hearth assembly into the oven.

4.If oven is supplied with hearth core plates, slide the plates into the oven.

GPD-48is supplied with (2) two hearth core plates.

GPD-60is supplied with (3) three hearth core plates.

5. Installation instruction for Hearth.

a.Place a screwdriver, or a similar prying device, between the core plate and hearth

frame support, (being careful not to chip the core plate) then place two spacer clips (PN G03086-1-9)between the core plate and the hearth frame support. (See instructions sheet – PN 1917401) 6” from front & 6” from rear.

b.Place a screwdriver between the back of the right core plate and hearth frame support. Pry the core plate forward, away from the hearth support and place a clip within the space centered on each core plate.

c.Repeat step 2 for the left core plate

d.Repeat step 3 for the center core plate for 60” unit.

Double Deck Assembly

1 Secure legs to lower section

2.Remove stainless steel top trim strip from lower unit if not already removed.

3.Tip upper unit backward. Remove vent patch at lower rear if not if not already removed.

4.Place 1” x 4” x 65” (25mm x 100mm x 1650mm) long piece of lumber across the rear top of oven to prevent stacks from misarranging.

5.Raise the top oven section up and onto the lower oven section.

6.Carefully remove piece of lumber ensuring lower section vent collar inserts into upper section vent hole.

Gas Connection

1.The appliance must be isolated from the gas supply piping system by closing its manual shut-ovalve during any pressure testing of the gas supply piping system at test pressure equal to or less that ½ psig. (3.45 kpa.).

2.The appliance and its shut o valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of ½ psig. (3.45 kpa.).

NOTE: The ovens should not be installed on the same line with space heaters, broilers or other equipment with high intermittent demand.

3.When making gas connections, uses a pipe joint compound that is resistant to the action of liquefied petroleum gases.

4.Each oven is supplied with two possible gas connection locations. One is located on the right side and the other is located on the right rear corner.

5.The right side connection is plugged with a ¾ counter sunken plug. If this connection is used, you must cap the rear connection.

6.The gas pressure regulator is part of the combination valve and is adjusted to yield a pressure of 6.0” water column for natural gas and 10” water column for propane gas.

Page 8

Part # 1844063 (08/06)

ASSEMBLY INSTRUCTIONS Continued

7. A separate shut-ovalve for each oven must be

8. For a stack of two ovens, two shut-ovalves, one

provided. It should be as close as possible to the

for each oven must be provided.

place where the gas line goes into the oven. It must

 

be located so that it is easily accessible. A handle or

 

wrench should be chained to the valve where it will

 

always be at hand.

 

3/4 NIPPLE

3/4" NPT 90° STREET ELBOW

 

5 3/4" NIPPLE

3/4" COUPLING

1" NPT 90° STREET ELBOW

 

3/4" x 3/4" x 1" TEE

 

6 1/2" NIPPLE

3/4" UNION

 

3/4" NIPPLE

 

3/4" COUPLING

3/4" NPT 90° STREET ELBOW

ADJUSTMENTS

Gas Pressure Adjustments

All GPD Series ovens are equipped with fixed orifices and cannot be adjusted for gas flow: If necessary, pressure adjustments can be made at the pressure regulator (located on the combination gas valve).

A pressure tap is supplied with the unit and it is installed on the manifold, downstream of the main valve. The gas pressure must be checked when the unit is installed, to ensure that the unit gas pressure is the same as specified on the rating plate.

IMPORTANT:

All gas burners and pilots need su cient air to operate and large objects should not be placed in front of this oven, which would obstruct the airflow through the front.

Objects should not be placed on main rear of oven while in use.

Flame & Air Mixture Adjustment

After the pilot burner is ignited, when heat is desired, turn gas cock dial to “ON” position and set the thermostat dial to the desired temperature. The oven burner flame should always have a blue appearance. This indicates a

Part # 1844063 (08/06)

Page 9

ADJUSTMENTS Continued

good mixture of air and gas. When using LP gas the flame will have a blue yellow appearance. Follow stepsthru to adjust the flame for good quality.

1.Loosen the small knurled locking disk.

2.Turn the large adjusting disk towards the air mixture throat to reduce the opening. This restricts the amount of air, causing the flame to turn yellow.

3.Turn the adjusting disk gradually out, away from the air mixer throat, allowing more air into the air mixer until the yellow disappears and a sharp blue flame appears.

4.When the flame turns blue and spreads out, turn the locking disk tight against the adjusting disk. There may be intermittent yellow-orangeflame noticed. This is caused by dust particles burning in the Flame. Should the burners fail to light, check to see if there is a problem with any or all of the following.

A.The gas supply: If there are other gas appliances on the same supply line, shut them o temporarily and see if the flame comes back on, or if it fluctuates as other gas appliances are turned on and o . If so, it would indicate overloading of the gas supply or a faulty gas pressure regulator. You should contact a qualified service agency or the local gas company to check the gas supply.

B.Dirty burner orifice or ports: With the oven cold, use a thin wire to check that the spud orifice (nozzle) is clear. If necessary, loosen and remove the spud. Be careful when cleaning not to enlarge the hole. Then, using a wire or thin nail, clear the burner ports of carbon deposits or other restrictions.

Periodically, after breaking the ovens in, check the burner flame and readjust the air mixture if needed. Black soot on the oven doors or in the burner compartment may indicate that not enough air is mixing with the gas. If this case back o the air adjustment disk until the proper flame and color is set.

By-PassFlame Adjustment

The by-passin the thermostat is a small gas supply through the control that is independent of the dial setting. It is controlled strictly by the Adjusting Screw. This small gas supply maintains a minimum flame or the burner(s), helping to maintain the heat in the oven and assisting in recovery. This adjustment is best done when the oven is being heated for the day’s business. To adjust theby-passflame follow steps thru .

1.Turn the oven on and set the thermostat to the desired temperature.

2.Allow the oven to pre-heatuntil the burner flame begins to throttle down.

3.At this point, turn the thermostat dial all the way down. This ensures that the thermostat is in the bypass mode. There should now be a small steady flame remaining across the burner without flickering or going out.

NOTE: It may be necessary to turn the thermostat back up to relight the burner(s) if there is not flame present.

4.Using a small screwdriver, reach through the access hold on the control panel to the left of the thermostat knob. Turn the by-passadjustment screw to raise or lower theby-passflame as required. Counterclockwise raises the flame, clockwise lowers the flame. Take care not to turn the screw out too far as that will allow gas to leak around the adjustment screw.

Calibration

1.Field calibration is seldom necessary and should not be attempted unless experience with cooking results definitely proves that the control is not maintaining the temperature to which the dial is set.

2. Place the

thermocouple of the test

instrument

or reliable

mercury thermometer in

the center

of the oven approximately one or two inches (25mm – 50mm) above the hearth. Do not place the thermocouple directly in contact with the hearth.

Page 10

Part # 1844063 (08/06)