Garland GAS PIZZA OVENS User Manual

INSTALLATION, OPERATING

& SERVICE INSTRUCTIONS

FOR THE

GARLAND GPD SERIES GAS PIZZA OVENS

WARNING:

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER

FLAMMABLE VAPORS OR LIQUIDS IN THE

VICINITY OF THIS OR ANY OTHER APPLIANCE.

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

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.

For Your Safety:

Post in a prominent location, instructions to be followed in the event the user smells gas. is 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. e 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specifications), may be superseded and is subject to change without notice.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

185 East South Street
Freeland, Pennsylvania 18224
Phone: [phone]
Fax: [phone]

Part # 1844063 (08/06) Page 1

Part # 1844063 (08/06) © 2005 Garland Commercial Industries, Inc.

GARLAND COMMERCIAL RANGES,
LTD.

1177 Kamato Road, Mississauga, Ontario L4W 1X4
CANADA
Phone: [phone]
Fax: [phone]

Enodis UK LTD.

Swallowfield Way, Hayes, Middlesex UB3 1DQ ENGLAND
Telephone: [phone]
Fax: [phone]

IMPORTANT INFORMATION

WAR NING:

is 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

Part # 1844063 (08/06)Page 2

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

By-pass Flame Adjustment: ............... 10

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

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

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-rated for high altitude installations.
Specify altitude of product if over 2000
feet (610m)

is product is not approved for residential
use

Installation Notes:

Non-Combustible &

Combustible Wall

Clearances

Sides Back

1” (25mm) 6” (152mm)

Entry Clearance:

Crated Uncrated

35”

(889mm)

26”

(660mm)

Manifold

Operating Pressure:

Natural Propane

6” WC

(15mbar)

10” WC

(25mbar)

24-21/32"

[626mm]

23-3/8"

[594mm]

14-1/2"

[368mm]

24-21/32"

[626mm]

31"

[787mm]

DIA6"

[152mm]

DIA6"

[152mm]

REAR&SIDE

GASINLET

51-7/8"

[1318mm]

DECK

28-1/2"

[724mm]

DECK

[1346mm]

45"

[1143mm]

DECK

74-1/32"

[1880mm]

23-3/8"

[594mm]

36-1/2"

[927mm]

67-5/32"

[1705mm]

53"

7-21/32"
[195mm]

INPUT SPECIFICATIONS

Natural Or Propane

MODEL

BTU/HR

GAS

KW

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.

3/4"N.P.T.

[19mm]

GASINLET

3"

[76mm]

7-15/16"
[201mm]

12-1/2"

[318mm]

GPD60-2 244,000 71.4 1" N.P.T.

[203mm]

MODEL

NUMBER

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)

Interior Dimensions: In (mm)

W H D W H (w/NSF legs) D

Exterior Dimensions In (mm)

45-1/4"

[1149mm]

8"

Part # 1844063 (08/06)Page 4

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. e 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. e 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. WARN ING; check gas connections for leaks,
using soap solution or similar means. DO NOT
CHECK WITH AN OPEN FLAME.

Rating Plate

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.

is 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

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

e 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. e appliance and its individual shut-off valve 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).

All burner-input ratings 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 suffix letters and numbers) and the
warranty serial number. e rating plate affixed to the
unit contains this information.

Part # 1844063 (08/06) Page 5

2. e appliance must be isolated from the gas supply
piping system by closing its individual manual
shut-off valve 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. e 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.

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 sufficient 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

Ventilation

is 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. e 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). is is usually part
of a mechanical exhaust system

Air Supply

1. It is necessary that sufficient room air ingress be
allowed to compensate for the amount of air
removed by any ventilating system. Otherwise
a subnormal atmospheric pressure will occur,
affecting 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 sufficient
air to operate.

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. is unit must be mounted on the factory-supplied
legs 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. ese units must be installed under an adequate
ventilation system. Refer to sections titled
“Ventilation” and “Air Supply” for further
instructions.

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-currents within the room.

DRAFT DIVERTER

FLUE CAP

Part # 1844063 (08/06)Page 6

INSTALLATION continued

Less than 10 feet (3 meters)

More than 10' (3 meters)

2' (60cm) Min.

3' (90cm) Min.

Termination Less than 10 feet (3 meters) from ridge Termination More than 10 feet (3 meters) from ridge

3' (90cm) Min.

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 offset too strong a pull.

Installing with Direct Ventilation

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

1. e draft diverter shipped with the oven is
installed.

ASSEMBLY INSTRUCTIONS

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.

Leg Installation

On single deck units, tip oven section units back. On
double-deck units, 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,

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:

lift and block up rear of unit. Install rear legs.

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

GPD-60 is 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. e appliance must be isolated from the gas supply
piping system by closing its manual shut-off valve
during any pressure testing of the gas supply piping
system at test pressure equal to or less that ½ psig.
(3.45 kpa.).

2. e appliance and its shut off 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: e 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. e right side connection is plugged with a ¾
counter sunken plug. If this connection is used, you
must cap the rear connection.

6. e 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.

Part # 1844063 (08/06)Page 8

ASSEMBLY INSTRUCTIONS Continued

7. A separate shut-off valve for each oven must be
provided. It should be as close as possible to the
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" COUPLING

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

6 1/2" NIPPLE

3/4" NIPPLE

3/4" COUPLING

8. For a stack of two ovens, two shut-off valves, one
for each oven must be provided.

3/4" NPT 90° STREET ELBOW

5 3/4" NIPPLE

1" NPT 90° STREET ELBOW

3/4" UNION

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. e 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 sufficient 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. e oven burner flame
should always have a blue appearance. is indicates a

Part # 1844063 (08/06) Page 9