Vulcan-Hart ML-135225-00G72 User Manual
SERVICE MANUAL
900RE SERIES
HEAVY DUTY
GAS GRIDDLES
MODELS
924RE ML-135221-00G24
936RE ML-135222-00G36
948RE ML-135223-00G48
960RE ML-135224-00G60
972RE ML-135225-00G72
- NOTICE -
This manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly qualified.
If you have attended a Vulcan Service School for this product, you
may be qualified to perform all the procedures described in this
manual.
This manual is not intended to be all encompassing. If you have not
attended a Vulcan Service School for this product, you should
read, in it's entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
required to perform the procedure. Procedures for which you do
not have the necessary tools, instruments and skills should be
performed by a trained Vulcan Service Technician.
Reproduction or other use of this Manual, without the express
written consent of Vulcan, is prohibited.
For additional information on Vulcan-Hart or to locate an authorized parts
and service provider in your area, visit our website at www.vulcanhart.com
VULCAN-HART
DIVISION OF ITW FOOD EQUIPMENT GROUP, LLC
WWW.VULCANHART.COM
P.O. BOX 696, LOUISVILLE, KY 40201-0696
TEL. (502) 778-2791
F35628 (10-04)
TABLE OF CONTENTS
GENERAL ........................................................................................................................................3
Introduction ................................................................................................................................3
Installation ..................................................................................................................................3
Operation....................................................................................................................................3
Cleaning .....................................................................................................................................3
Lubrication..................................................................................................................................3
Specifications............................................................................................................................. 3
Tools ...........................................................................................................................................3
REMOVAL AND REPLACEMENT OF PARTS ..............................................................................4
Component Location ................................................................................................................. 4
Control Panel ............................................................................................................................. 5
Covers and Panels .................................................................................................................... 5
Bullnose Weld Assembly ..........................................................................................................5
Heat Shield.................................................................................................................................5
Back Panel .................................................................................................................................5
Power On/Off Switch .................................................................................................................6
Indicator Light ............................................................................................................................ 6
Thermostat .................................................................................................................................6
Flame Switch..............................................................................................................................7
Ignitor Module ............................................................................................................................ 7
Gas Burner .................................................................................................................................8
Pilot Solenoid .............................................................................................................................8
Pilot .............................................................................................................................................9
Dual Solenoid.............................................................................................................................9
SERVICE PROCEDURES AND ADJUSTMENTS...................................................................... 10
Thermostat Calibration ........................................................................................................... 10
Main Burner Adjustment ........................................................................................................ 10
Gas Pressure Measurement .................................................................................................. 11
Extended Shutdown ............................................................................................................... 11
ELECTRICAL OPERATION ......................................................................................................... 12
Component Description.......................................................................................................... 12
Sequence of Operation .......................................................................................................... 12
SCHEMATIC DIAGRAMS ............................................................................................................ 13
TROUBLESHOOTING GUIDE..................................................................................................... 18
F35628 (10-04)
© VULCAN-HART, 2004
— 2 —
GENERAL
INTRODUCTION
Procedures in this manual will apply to all
models unless specified. Pictures and
illustrations can be of any model unless the
picture or illustration needs to be model
specific. All models are equipped with 30,000
BTU/HR burners as standard equipment. One
burner is used for every 12 inches of griddle
surface.
All models use an automatic spark igniter to
light the burners.
INSTALLATION
Generally, installations are made by the dealer
or contracted by the dealer or owner. Detailed
installation instructions are included in the
Installation & Operation Manual which is sent
with each unit.
SPECIFICATIONS
Electrical Data
Model Volts Hertz Phase Amps
924RE 120 60 1 0.5
936RE 120 60 1 0.5
948RE 120 60 1 0.5
960RE 120 60 1 0.5
972RE 120 60 1 0.5
Gas Data
Model Input BTU/HR Manifold Pressure
Natural LP Gas Natural LP Gas
924RE 60,000 60,000 5.0” W.C. 10” W.C.
936RE 90,000 90,000 (1.1 kPa) (2.2 kPa)
948RE 120,000 120,000
960RE 150,000 150,000
972RE 180,000 180,000
TOOLS
OPERATION
Detailed operation instruction are included in
the Installation and Operation Manual which
is sent with each unit.
CLEANING
Detailed cleaning procedures are included in
the Installation and Operation Manual which
is sent with each unit.
LUBRICATION
No lubrication is required on this equipment.
Standard
· Hand tools (standard set)
· VOM with AC current tester (any
quality VOM with a sensitivity of at least
20,000 ohms per volt can be used)
· Temperature tester (thermocouple type)
· Manometer
— 3 —
F35628 (10-04)
Back Panel
Griddle
REMOVAL AND REPLACEMENT OF PARTS
COMPONENT LOCATION
Bullnose
Deflector Plate
Heat Shield
Control Plate
Control Panel
Grease Drawer
Flame
Switch
Dual
Solenoid
Ignitor
Module
Panel
Connector
Ignitor
Module
Flame
Switch
Dual
Solenoid
Pilot
Solenoid
F35628 (10-04)
Figure A
— 4 —
CONTROL PANEL
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AND
FOLLOW LOCKOUT / TAGOUT
PROCEDURES.
1. Remove the two screws securing the
control panel. One screw is located at
each end of the control panel.
2. Pull the control panel forward and
disconnect the electrical connector near
the right end.
Panel
Connector
Griddle
Bullnose
Figure C
3. Reverse the procedure to install.
Heat Shield
1. Remove control panel.
2. The heat shield clamps on the front of the
griddle and can be removed by grasping
the top of the shield and pulling forward.
Remove
Screw
Control
Panel
Figure B
3. Reverse the procedure to install.
COVERS AND PANELS
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AND
FOLLOW LOCKOUT / TAGOUT
PROCEDURES.
Bullnose Weld Assembly
1. Remove control panel.
2. The bullnose weld assembly is secured
with two screws, one on each side of the
bottom of the assembly. Remove these
screws, then remove the bullnose weld
assembly from the griddle.
Back
Panel
Griddle
Deflector
Plate
Heat
Shield
Figure D
3. Reverse the procedure to install.
Back Panel
1. Remove all screws from rear of griddle
securing the back panel.
2. Remove the back panel. (See Figure D)
3. Reverse procedures to install.
— 5 —
F35628 (10-04)
POWER ON/OFF SWITCH
INDICATOR LIGHT
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AND
FOLLOW LOCKOUT / TAGOUT
PROCEDURES.
1. Remove the control panel.
2. Label and disconnect the wires to the
power ON/OFF switch.
3. Squeeze the switch retainer and slide the
switch out through the front of the control
panel.
ON/OFF
Switch
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AND
FOLLOW LOCKOUT / TAGOUT
PROCEDURES.
1. Remove the control panel.
2. Label and disconnect the wires to the Red
indicator light.
3. Squeeze the light retainers and slide the
indicator light out through the front of the
control panel.
4. Reverse procedures to install and check
for proper operation.
THERMOSTAT
WARNING: DISCONNECT THE ELECTRICAL
POWER TO THE MACHINE AND
FOLLOW LOCKOUT / TAGOUT
PROCEDURES.
Figure E
4. Reverse procedures to install and check
for proper operation.
1. Remove the control panel.
2. Remove the knob.
3. Remove the two screws and two washers
securing the thermostat and thermostat
dial to the control panel, then remove the
thermostat and thermostat dial.
4. When installing a new thermostat reverse
the procedure and be sure to position the
thermostat dial with OFF at the top.
5. Check calibration. Refer to the Service
Procedures and Adjustments section of
this manual.
F35628 (10-04)
— 6 —
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