Manitowoc GT Series User manual

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)
Service Manual
Garland GT Series
US Range UT Series
Heavy Duty Gas
Counter Equipment
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, operating and maintenance instructions thoroughly before
installing or servicing this equipment.
IMPORTANT
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.
Users are cautioned that maintenance and repairs must be performed by a Garland/US Range
Authorized Service Agent using genuine Garland replacement parts. Garland/US Range 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 www.garland-group.com
TM
Garland Commercial Ranges, Ltd.
1177 Kamato Road
Mississauga, Ontario L4W 1X4 Canada
General Inquiries P: 905 624 0260 F: 905 624 5669
www.Garland-Group.com
Parts & Service
1 800 427 6668 (Phone, US & Canada)
1 800 361 7745 (Fax, US & Canada)

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 2
Safety Requirements
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 cause cancer. Operatin 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
reporductive harm.
WARNING
Before working on any appliance, Shut Off the gas supply at the main shut-off valve and electrical supply at the
main power switch. On completion of any service work, test for gas leaks before returning the equipment into
service.
IMPORTANT
Please read and follow all the instructions carefully as the manufacturer cannot be held responsible for any
damage to property, persons caused by incorrect installation or operation of the equipment.
Your equipment must be installed and adjusted by a competent person in accordance with the law. Failure to
install appliances correctly could lead to prosecution. It is in your own interest and that of safety to ensure that
the law is complied with. Refer to Garland/US Range Installation And Operation Manual for further details.
Your Garland/US Range Authorized Service Agent (ASA)is well qualified to provide this service.
Periodic inspections by your Garland/US Range ASA or qualified service company are recommended to check
temperatures, burner adjustments and to ensure that moving parts are operative. Whenever possible avoid
overheating idle equipment as this is the primary cause for increased service cost.
NOTE
This manual is written for the model(s) specified on the front cover. Unless specified, this manual should not be
used for any other make or model of appliance.
Garland reserves the right to change product specifications without notices and accepts no liability for any
inaccuracies, errors or ommissions contained herein.
Keep your working area free and clear.
Remember Safety First.

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 3
Contents
Safety Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Rating Plate, Serial Number Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Model Code Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
General Pilot Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Lighting Standing Pilots - All Models 15
Open Top Burner Models 15
Broilers Models 15
Griddles with Valve Controls 15
Griddles with SIT Thermostats 16
Griddles with GS Thermostats 16
Shutdown Procedure 16
Shutdown Procedure on Griddles with SIT Thermostats 16
Gas Pressure Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Rear Gas Pressure Regulator Connection Options 17
Purpose of gas pressure regulator 17
Open Top Burners Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Pilot Adjustment Valves 18
Burner Gas / Air Shutter Adjustment 18
Troubleshooting — Open Top Burners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Griddle Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Griddle Spark Igniter 20
High Tension Lead (HTL) & Insulation 21
Thermostatic Griddle Adjustments (SIT Control) 22
Thermostatic Griddle Adjustments (GS Control) 26
Griddles with Hi/Low Valves 28
Troubleshooting — Griddles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Broiler Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Pilot Adjustment Valves 30
Gas Burner Control Valves 30
Burner Gas / Air Shutter Adjustment 31
Troubleshooting — Broilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Wiring Diagram (GTGG/UTGG__M Models Electric Spark) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Wiring Diagram (GTGG/UTGG Electric Spark) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Gas Conversion Kits (from Natural to Propane). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Gas Conversion Kits (from Propane to Natural). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Bulletins & Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 4
Rating Plate, Serial Number Information
Rating Plate
The rating plate is affixed to a bracket mounted at the rear of the unit, and visible from the front. The grease drawer
may need to be removed to view the rating plate.
Serial Number (Year/Month Information)
From June 2004 to Present, the Serial Number is 13 Digits Long.
10 05 1001 00668
Sequential Number
Factory Code
Month
Year

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 5
Model Code Information
Open Top Models:
• GTOG__-_ / UTOG__-_ Open Top Model
• GTOG__-SU_ / UTOG__-SU_ Open Top Step-Up Model
GT/UT O G 36 - 6
Number of Burners, or
SU (Step-Up) + Number of Burners
Nominal Width of Equipment
Fuel Type: Gas (Propane or Natural), Electric
Open Burner
Garland/US Range Heavy Duty Counter Top Model
Griddle Models:
• GTGG__-G__ / UTGG__-G__ Valve-Controlled Griddle Model (out-of-production)
• GTGG__-G__M / UTGG__-G__M Valve-Controlled Griddle Model with Suffix M
• GTGG__-GT__ / UTGG__-GT__ Thermostat-Controlled Griddle Model (out-of-production)
• GTGG__-GT__M / UTGG__-GT__M Thermostat-Controlled Griddle Model with Suffix M
GT/UT G G 48 - G 48 M
Models with Suffix M
Model Size
Griddle with Hi-Low Valve Control, or
GT - Thermostatic Griddle
Nominal Width of Equipment
Fuel Type: Gas (Propane or Natural), Electric
Griddle
Garland/US Range Heavy Duty Counter Top Model
Broiler Models:
• GTBG__-NR__ / UTBG__-NR__ Non-Adjustable (Fixed) Radiant Broiler Model
• GTBG__-AR__ / UTBG__-AR__ Adjustable Radiant Broiler Model
• GTBG__-AB__ / UTBG__-AB__ Adjustable Charcoal Broiler Model
GT/UT B G 48 - AR 48
Model Size
NR - Non-Adjustable (Fixed) Radiant
AR - Adjustable Radiant
AB - Adjustable Charcoal Broiler
Nominal Width of Equipment
Fuel Type: Gas (Propane or Natural), Electric
Broiler
Garland/US Range Heavy Duty Counter Top Model

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 6
Technical Data
Model Information
Garland Models US Range Models Model Information
GTOG12-2 UTOG12-2 Gas, Two Open Burners, 12”Wide
GTOG24-4 UTOG24-4 Gas, Four Open Burners, 24”Wide
GTOG36-6 UTOG36-6 Gas, Six Open Burners, 36”Wide
GTOG48-8 UTOG48-8 Gas, Eight Open Burners, 48”Wide
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors BTU/h Injectors
GTOG12-2 UTOG12-2 60,000 #36 52,000 #53
GTOG24-4 UTOG24-4 120,000 #36 104,000 #53
GTOG36-6 UTOG36-6 180,000 #36 156,000 #53
GTOG48-8 UTOG48-8 240,000 #36 208,000 #53
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTOG24-4 Shown
Open Top Burner Models

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 7
Technical Data
Model Information
Garland Models US Range Models Model Information
GTOG24-SU4 UTOG24-SU4 Gas, Four Open Burners Step Up, 24”Wide
GTOG36-SU6 UTOG36-SU6 Gas, Six Open Burners Step Up, 36”Wide
GTOG48-SU8 UTOG48-SU8 Gas, Eight Open Burners Step Up, 48”Wide
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors BTU/h Injectors
GTOG24-SU4 UTOG24-SU4 120,000 #36 108,000 #1.6mm
GTOG36-SU6 UTOG36-SU6 180,000 #36 162,000 #1.6mm
GTOG48-SU8 UTOG48-SU8 240,000 #36 216,000 #1.6mm
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTOG24-SU4 Shown
Open Top Burner Step-Up Models

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 8
Technical Data
Model Information
Garland Models US Range Models Model Information
GTGG24-G24 UTGG24-G24 Gas, Valve Controlled Griddle, 24”Wide
GTGG36-G36 UTGG36-G36 Gas, Valve Controlled Griddle, 36”Wide
GTGG48-G48 UTGG48-G48 Gas, Valve Controlled Griddle, 48”Wide
GTGG60-G60 UTGG60-G60 Gas, Valve Controlled Griddle, 60”Wide
GTGG72-G72 UTGG72-G72 Gas, Valve Controlled Griddle, 72”Wide
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors BTU/h Injectors
GTGG24-G24 UTGG24-G24 52,000 #37 52,000 #53
GTGG36-G36 UTGG36-G36 78,000 #37 78,000 #53
GTGG48-G48 UTGG48-G48 104,000 #37 104,000 #53
GTGG60-G60 UTGG60-G60 130,000 #37 130,000 #53
GTGG72-G72 UTGG72-G72 156,000 #37 156,000 #53
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTGG36-G36 Shown
Valve Controlled Griddle Models

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 9
Technical Data
Model Information
Garland Models US Range Models Model Information
GTGG24-G24M UTGG24-G24M Gas, Valve Controlled Griddle, 24”Wide
GTGG36-G36M UTGG36-G36M Gas, Valve Controlled Griddle, 36”Wide
GTGG48-G48M UTGG48-G48M Gas, Valve Controlled Griddle, 48”Wide
GTGG60-G60M UTGG60-G60M Gas, Valve Controlled Griddle, 60”Wide
GTGG72-G72M UTGG72-G72M Gas, Valve Controlled Griddle, 72”Wide
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors BTU/h Injectors
GTGG24-G24M UTGG24-G24M 54,000 #35 54,000 #52
GTGG36-G36M UTGG36-G36M 81,000 #35 81,000 #52
GTGG48-G48M UTGG48-G48M 108,000 #35 108,000 #52
GTGG60-G60M UTGG60-G60M 135,000 #35 135,000 #52
GTGG72-G72M UTGG72-G72M 162,000 #35 162,000 #52
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTGG36-G36M Shown
Valve Controlled Griddle Models (with Suffix M)

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 10
Thermostat Controlled Griddle Models
Technical Data
Model Information
Garland Models US Range Models Model Information
GTGG24-GT24 UTGG24-GT24 Gas, Thermostatically Controlled Griddle, 24”Wide
GTGG36-GT36 UTGG36-GT36 Gas, Thermostatically Controlled Griddle, 36”Wide
GTGG48-GT48 UTGG48-GT48 Gas, Thermostatically Controlled Griddle, 48”Wide
GTGG60-GT60 UTGG60-GT60 Gas, Thermostatically Controlled Griddle, 60”Wide
GTGG72-GT72 UTGG72-GT72 Gas, Thermostatically Controlled Griddle, 72”Wide
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors# BTU/h Injectors#
GTGG24-GT24 UTGG24-GT24 64,000 #36 64,000 #51
GTGG36-GT36 UTGG36-GT36 96,000 #36 96,000 #51
GTGG48-GT48 UTGG48-GT48 128,000 #36 128,000 #51
GTGG60-GT60 UTGG60-GT60 160,000 #36 160,000 #51
GTGG72-GT72 UTGG72-GT72 192,000 #36 192,000 #51
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTGG36-GT36 Shown

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 11
Technical Data
Model Information
Garland Models US Range Models Model Information
GTGG24-GT24M UTGG24-GT24M Gas, Thermostatically Controlled Griddle, 24”Wide
GTGG36-GT36M UTGG36-GT36M Gas, Thermostatically Controlled Griddle, 36”Wide
GTGG48-GT48M UTGG48-GT48M Gas, Thermostatically Controlled Griddle, 48”Wide
GTGG60-GT60M UTGG60-GT60M Gas, Thermostatically Controlled Griddle, 60”Wide
GTGG72-GT72M UTGG72-GT72M Gas, Thermostatically Controlled Griddle, 72”Wide
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @
10”WC Manifold
Pressure
Models Models BTU/h Injectors# BTU/h Injectors#
GTGG24-GT24M UTGG24-GT24M 56,000 #33 56,000 #52
GTGG36-GT36M UTGG36-GT36M 84,000 #33 84,000 #52
GTGG48-GT48M UTGG48-GT48M 112,000 #33 112,000 #52
GTGG60-GT60M UTGG60-GT60M 140,000 #33 140,000 #52
GTGG72-GT72M UTGG72-GT72M 168,000 #33 168,000 #52
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTGG36-GT36M Shown
Thermostat Controlled Griddle Models (with Suffix M)

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 12
Technical Data
Model Information
Garland Models US Range Models Model Information
GTBG24-NR24 UTBG24-NR24 Gas Broiler, Non-Adjustable Grates and Cast Iron
Radiant
GTBG36-NR36 UTBG36-NR36 Gas Broiler, Non-Adjustable Grates and Cast Iron
Radiant
GTBG48-NR48 UTBG48-NR48 Gas Broiler, Non-Adjustable Grates and Cast Iron
Radiant
GTBG60-NR60 UTBG60-NR60 Gas Broiler, Non-Adjustable Grates and Cast Iron
Radiant
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors# BTU/h Injectors#
GTBG24-NR24 UTBG24-NR24 72,000 #45 72,000 #1.3mm
GTBG36-NR36 UTBG36-NR36 108,000 #45 108,000 #1.3mm
GTBG48-NR48 UTBG48-NR48 144,000 #45 144,000 #1.3mm
GTBG60-NR60 UTBG60-NR60 180,000 #45 180,000 #1.3mm
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTBG24-NR24 Shown
Broiler Non-adjustable Grates Models

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 13
Technical Data
Model Information
Garland Models US Range Models Model Information
GTBG24-AR24 UTBG24-AR24 Gas, Broiler W/Adjustable Grates and Cast Iron
Radiant
GTBG36-AR36 UTBG36-AR36 Gas, Broiler W/Adjustable Grates and Cast Iron
Radiant
GTBG48-AR48 UTBG48-AR48 Gas, Broiler W/Adjustable Grates and Cast Iron
Radiant
GTBG60-AR60 UTBG60-AR60 Gas, Broiler W/Adjustable Grates and Cast Iron
Radiant
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors# BTU/h Injectors#
GTBG24-AR24 UTBG24-AR24 72,000 #45 72,000 #1.3mm
GTBG36-AR36 UTBG36-AR36 108,000 #45 108,000 #1.3mm
GTBG48-AR48 UTBG48-AR48 144,000 #45 144,000 #1.3mm
GTBG60-AR60 UTBG60-AR60 180,000 #45 180,000 #1.3mm
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTBG24-AR24 Shown
Broiler Adjustable Grates Models

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 14
Technical Data
Model Information
Garland Models US Range Models Model Information
GTBG24-AB24 UTBG24-AB24 Gas,Broiler W/Adjustable Grates and Ceramic
Coals, 24”Wide
GTBG36-AB36 UTBG36-AB36 Gas,Broiler W/Adjustable Grates and Ceramic
Coals, 36”Wide
GTBG48-AB48 UTBG48-AB48 Gas,Broiler W/Adjustable Grates and Ceramic
Coals, 48”Wide
GTBG60-AB60 UTBG60-AB60 Gas,Broiler W/Adjustable Grates and Ceramic
Coals, 60”Wide
Line Ratings
Garland US Range Natural Gas @ 4.5”WC
Manifold Pressure
L. Propane Gas @ 10”WC
Manifold Pressure
Models Models BTU/h Injectors# BTU/h Injectors#
GTBG24-AB24 UTBG24-AB24 60,000 #36 60,000 #51
GTBG36-AB36 UTBG36-AB36 90,000 #36 90,000 #51
GTBG48-AB48 UTBG48-AB48 120,000 #36 120,000 #51
GTBG60-AB60 UTBG60-AB60 150,000 #36 150,000 #51
For use with Natural or Propane gas only.
Gas input ratings shown for installation up to 2000 ft (610m) above sea level.
Supply Operating Pressure
Natural Gas Propane Gas
“WC MBar “WC MBar
7 17.5 11 27.5
GTBG24-AB24 Shown
Broiler Adjustable Grates & Ceramic Coals Models

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 15
General Pilot Procedures
Lighting Standing Pilots - All Models
After the appliance has been installed by a licensed
gas trades-person and all connections, pilot lights and
controls have been inspected for proper operation.
All gas appliances that use standing pilot systems are
generally assumed to be operating with the pilot on
continuously. The appliances should not be restarted
except in the event of a gas service interruption to the
facility.
If a pilot flame does go out, here are the basic steps to
check before you re-light the pilot:
1. Check that all gas lines are in place and secured
and there is no accumulation of gas inside the
unit.
2. Ensure the main shut off valve is in the off
position.
3. Turn off all individual burner valves.
4. Turn on or open the main shut off valve to the
appliance.
5. Follow the pilot lighting procedure applicable to
your model. The pilot should ignite within a few
attempts. You will be able to see the pilot flame on
a hotplate under the protective pilot shield cast
into the burner top grate. Pilot flames on griddles
and broilers can be viewed through observation
holes in the stainless steel front panels.
6. If you do not have a pilot flame established fairly
quickly and begin to smell gas, shut off the main
valve and wait five minutes to let the gas build-up
escape.
7. Only once the pilot flame has been established
should you turn on the burner control. When
the burner control is on it allows gas flow to the
burner. if there is no pilot flame it will allow gas
to build up and cause possible delayed ignition,
which could result in an explosion.
Open Top Burner Models
Pilots are easily accessible. Make sure the individual burner valve is
in the off position, then use an open flame device, match, or BBQ
lighter to ignite.
Broilers Models
Pilots are easily accessible. Make sure the individual burner valve is
in the off position, then use an open flame device, match, or BBQ
lighter to ignite.
Griddles with Valve Controls
• Make sure the individual valve control is in the off position.
• Use the piezo spark button(s), or electric spark if your model
has this option, to ignite the pilot.
• Once the pilots are lit you may now turn your valve control to
the high or low flame setting.
• To shut down the main burner turn the valve to off position.

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 16
General Pilot Procedures (continued)
Griddles with SIT Thermostats
1. Turn thermostat control knob to the “ ” (Figure 1) position. Then push in to engage the
flow of gas through the safety device to the pilot.
2. While holding the knob in, light pilot by pressing the red piezo lighter button or the black
igniter button if your model has the electric ignition option.
3. Continue to hold the knob in for 15 seconds after ignition, then release. Pilot should remain
lit.
4. If the pilot burner fails to light or does not stay lit, wait 5 minutes and repeat steps 1 to 3.
5. Turn the thermostat knob to the desired cooking temperature.
6. To shut down the main burner, turn the control knob to the “ ” position.
Figure 1
Griddles with GS Thermostats
1. Ensure the individual on-off valve is in the off position.
2. Use the piezo, or electric spark if your model has this option, button(s) to ignite the pilot.
3. Once the pilot is lit, turn the thermostat knob to the desired cooking temperature.
4. To shut down, turn individual on-off valves to the off position.
Shutdown Procedure
To shutdown, turn all main burner valves to OFF position. If the appliance is to be shut down for a extended period
of time, close the pilot valves, (gum valve) by turning their set screws fully clockwise.
Shutdown Procedure on Griddles with SIT Thermostats
The Garland/US Range SIT thermostat control knob is configured to leave the pilot flame on continuously. The
knob is designed with a tab which will not permit complete pilot shutdown. In order to shutdown the griddle pilot
flame completely, you must perform Steps 1 to 3 below. Note There are no pilot valves (gum valve).
A
B
C
Hub
1. Turn griddle thermostat control knob to symbol “ ”position and then
loosen the knob set screw (C). Gently pull knob off.
2. With the knob removed, push-down and turn the hub until the symbol (•) (B)
lines up with symbol (A). With the hub in the position shown, the gas should
be off at the pilots and burners. There are no pilot valves (gum valve).
3. Finally, turn the manual valve on the main gas supply to the OFF position.
Pilot Flame On
Complete Shutdown

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 17
Gas Pressure Regulator
Rear Gas Pressure Regulator Connection Options
• Pipe size: 3/4”(19.05mm) NPT for all models.
Ther are two options to connent a Gas Pressure Regulator, as shown in Figure 2 and Figure 3 below. Refer to
Installation and Operation Manual for further details
Figure 2:
Gas pressure regulator connection is designed to
flush-mount.
Note: when installing as a flush mount gas pressure
regulator connection, (to allow for equipment
installation against a noncombustible wall), a
certified flexible gas hose and quick disconnect
assembly is required to allow the unit to be moved in
the event an adjustment of the gas pressure regulator
is required.
Figure 2
Figure 3:
Gas pressure regulator connection is designed
straight through.
Garland recommends the use of certified flexible gas
hose and quick disconnect assembly to allow the unit
to be moved in the event an adjustment of the gas
pressure regulator is required.
Figure 3
Purpose of gas pressure regulator
Basics Of A Gas Pressure Regulator
Inlet Outlet
Atmospheric
Removable Seal Cap
Vent
Adjustment (Screw)
Loading Element
(Spring)
Measuring Element
(Diaphragm)
Restricting Element
(Valve Disk and Seat)
Gas pressure regulators have two main purposes, to
reduce supply main pressure to safe operating pressures
of connected appliances and to maintain constant
downstream pressure, regardless of changes in the gas
flow or upstream pressure variations.
Note: Gas service suppliers usually supply gas pressure
higher than the safe operating pressures of connected
appliances.
If an appliance receives too much fuel, it will over-fire. If
it receives too little fuel, it will under-fire. It will produce
too much or too little heat. Combustion characteristics
could change resulting in carbon monoxide generation.
The appliance may not work properly or efficiently.
Note: Always refer to the rating plate of appliance for actual manifold pressure required.

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 18
Open Top Burners Adjustments
Pilot Adjustment Valves
• Also known as gum valves (Figure 16).
• Available in single or double.
• Adjustable with a set-screw using a straight blade pocket
screwdriver.
• Turn set-screw counter-clockwise to increase flow; turn
set-screw clockwise to decrease flow.
• Precisely adjust the pilot flame to a slight yellow tip to
provide maximum performance.
Pilot Adjustment Valves Location
• All pilots adjustment valves are located on the manifold,
behind the front panel (Figure 17).
• To remove the front panel, first remove the knobs with set
screws. Then release the four (4) screws holding the panel
and remove panel.
Adjustable
Set-Screw
Pilot Tip Figure 16
Gas
Manifold Gum
Valve
Front
Panel
Figure 17
Burner Gas / Air Shutter Adjustment
Variations in field conditions, and/or rough handling of the
equipment in transit may result in the need for adjustment of
the primary air to the burners. The following steps will show
you how to provide a sharp blue flame at the full rate (open
valve fully for the maximum gas flow).
1. On the burner locate the aeration shutter (Figure 6).
2. Loosen the fixing screw so that the aeration shutter turns
freely.
3. Turn on the gas flow and ignite the burner.
4. Rotate the air shutter to obtain the 1/2”stable, sharp inner
blue cones (Figure 7).
Injector LŽĐĂƟŽŶ
Fixing Screw
Air Flow AeraƟon
^ŚƵƩĞƌ
Figure 6
Open Burner
1/2” stable sharp inner blue cone
Figure 7
US Range and Garland Burner Heads:
Garland
Star Burner Head
US Range
Burner Head

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 19
Troubleshooting — Open Top Burners
WARNING
Inspection, testing and repair of equipment should be performed only by qualified service personnel. Certain
procedures in this section require gas tests or measurements while gas is applied to the unit. Use extreme caution
at all times. If test points are not easily accessible, disconnect main gas line, attach test equipment and reapply gas
supply to continue the test.
Always confirm manifold gas pressure at all times.
PROBLEM POSSIBLE CAUSE SOLUTION
Burner Flame soft –lazy tip yellow Not enough air mixing with gas Open air shutter
Flames lift off burners
Too much air mixing with gas Reduce air shutter openingFlashes back in burner
“Pop’s”excessively when turned off
Delayed ignition
Unit over-gassed fired Adjust manifold pressure
Incorrect injector Check injector size
Burner ports plugged Clean burner ports
Pilot burner will not ignite Pilot flame too small Adjust pilot valve
Draft in Kitchen Determine cause
Flame lifts off pilot Pilot over-gassed fired Adjust pilot valve

A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1)Page 20
Griddle Adjustments
Griddle Spark Igniter
Garland has two different igniter systems on the griddle units:
1. Push-button piezo igniter system
2. Electronic Spark igniter system
1. Push-button Piezo igniter system (Figure 8) consists
of a small, spring-loaded hammer, which creates
voltage when a button is pressed. 120V electric
connection is NOT required; wires are needed to move
the electricity to an electrode close to the pilot. Proper
alignment is critical for better performance. Only one
spark is generated per press of the button. When
equipment installed above 8000 feet sea-level, lighters
with piezo-electric ignition are no longer reliable.
2. Electronic Spark Igniter System consists of an
Electronic Spark Generator (ESG) box (Figure 10),
a momentary switch (Figure 9), and electrical
components, plus wires to discharge a spark across a
gap between electrodes (spark gap). See below, section
2.3 ESG Technical Specification.
When electrical voltage connection is required, refer to
section Wiring Diagram.
2.1 Remove, Test, and Replace a Momentary Switch
(MS)
a. Ensure power cord is unplugged.
b. Remove decorative dress nut off the
momentary switch
c. Remove knobs with set screws.
d. Remove the four (4) screws from front panel
and remove panel.
e. Griddle with SIT Thermostat: On the LEFT
hand side of the unit remove screw and the
momentary switch side panel (Figure 9).
Griddle with GS Thermostat: On the
RIGHT hand side of the unit remove screw
and the momentary switch side panel
(not shown).
f. Remove momentary switch nut and unplug
rear terminal wires.
g. Connect multi-tester probes on the
momentary switch terminals. Continuity
must be indicated when button is pressed,
if not, replace switch.
Figure 8
Momentary
Switch
Momentary
Switch Side Panel
Knob
Front
Rail
Figure 9. SIT Tstat and Momentary Switch
Electronic Spark
Generator (ESG)
ZĂƟŶŐ^ĞƌŝĂů
Plate
REAR VIEW
Figure 10
This manual suits for next models
79
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