
TM...................................
TECHNICAL MANUAL
MODEL DESCRIPTION
USN-50 Fryer, Deep-Fat, Electric w/Solid State Controls
150F-440VMN 440 Volt, 60 HZ, 3 Phase
NSN: _________________________

Star Manufacturing International 10 Sunnen Drive St. Louis, MO.63143-3800
Part Number: 2M-W480 Ph: 314-781-2777 Fax: 314-781-2714
May 30, 2008, Rev B
WWW.STAR-MFG.COM

Table Of Contents
Table Of Contents...........................................................................................................0
Warnings..........................................................................................................................2
Specifications..................................................................................................................3
Installation Instructions .................................................................................................4
DATAPLATE ....................................................................................................................................4
ELECTRICAL SERVICE ENTRANCE....................................................................................................4
SAFETY CIRCUIT CONNECTIONS......................................................................................................4
Operating Instructions ................................................................................................... 5
FILL LEVELS ...................................................................................................................................5
CONTROLS .....................................................................................................................................5
Operating Instructions cont’d........................................................................................ 6
LIMITING CONTROL TEST SWITCH ...................................................................................................6
Operating Instructions cont’d........................................................................................ 7
HEATING ELEMENTS ........................................................................................................................7
DRAINING THE FRYER OIL.................................................................................................................7
Maintenance Instructions............................................................................................... 8
FRYER CLEANING ...........................................................................................................................8
TEMPERATURE CONTROL................................................................................................................8
OVER-TEMPERATURE PROTECTION.................................................................................................8
MAINTENANCE INSTRUCTIONS CONT’D..................................................................... 9
THERMOSTAT BULBS CHECK...........................................................................................................9
COMPONENT ACCESS.....................................................................................................................9
TECHNICAL SUPPORT .....................................................................................................................9
CALIBRATION..................................................................................................................................9
Maintenance Instructions cont’d................................................................................. 10
A. CHECKING TEMPERATURE........................................................................................10
B. ACCESSING THE TEMPERATURE CONTROL COMPONENTS ................................10
Maintenance Instructions cont’d................................................................................. 11
C. TESTING TEMPERATURE SENSE PROBE.................................................................11
Maintenance Instructions cont’d................................................................................. 12
D.TESTING TEMPERATURE SELECTOR SWITCH..............................................................12
E CALIBRATION OF TEMPERATURE CONTROL BOARD................................................12
Wire Diagram.................................................................................................................13
Parts List........................................................................................................................14

Star Manufacturing
10 Sunnen Drive
St. Louis, Mo. 63143
For Parts And Technical Support Call:
Toll Free: PH 800-807-9054
Direct Line: PH: 314-781-2714
Fax Number: PH: 800-396-2677
1

Warnings
DANGER: THIS APPLIANCE MUST BE GROUNDED AT THE TERMINAL
PROVIDED. FAILURE TO GROUND THE APPLIANCE COULD
RESULT IN ELECTROCUTION AND DEATH.
WARNING: INSTALLATION OF THIS LANG FRYER MUST BE DONE BY
PERSONNEL QUALIFIED TO WORK WITH ELECTRICITY.
IMPROPER INSTALLATION CAN CAUSE INJURY TO PERSONNEL
AND/OR DAMAGE TO THE EQUIPMENT. THE UNIT MUST BE
INSTALLED IN ACCORDANCE WITH ALL APPLICABLE CODES.
ALWAYS KEEP THE AREA NEAR THE APPLIANCE FREE FROM
COMBUSTIBLE MATERIALS.
BEFORE PERFORMING ANY WORK ON INTERNAL COMPONENTS,
DISCONNECT THE APPLIANCE FROM THE ELECTRIC POWER
SUPPLY.
KEEP WATER AND SOLUTIONS OUT OF CONTROL AND
ELECTRICAL EQUIPMENT. NEVER SPRAY WATER ON THE
APPLIANCE WHICH MAY PERMIT LIQUID TO GET INTO THE
CONTROL AND ELECTRICAL EQUIPMENT AREAS.
CAUTION: KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND DRY. IF SPILLS
OCCUR, CLEAN IMMEDIATELY, TO AVOID THE DANGER OF SLIPS OR
FALLS.
MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS
MEMBRANES AND CLOTHING. PRECAUTIONS SHOULD BE TAKEN TO
WEAR RUBBER CLOVES, GOGGLES OR FACE SHIELD AND
PROTECTIVE CLOTHING. CAREFULLY READ THE WARNING AND
FOLLOW THE DIRECTIONS ON THE LABEL OF THE CLEANER TO BE
USED.
USE OF ANY REPLACEMENT PARTS OR OTHER THAN THOSE
SUPPLIED BY LANG OR THEIR AUTHORIZED DISTRIBUTOR CAN CAUSE
BODILY INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT
AND WILL VOID ALL WARRANTIES.
NOTICE: NEVER LEAVE A CHLORINE SANITIZER IN CONTACT WITH STAINLESS
STEEL SURFACES LONGER THAN 10 MINUTES. LONGER CONTACT CAN
CAUSE CORROSION.
IMPORTANT: SERVICE PERFORMED BY OTHER THAN FACTORY AUTHORIZED
PERSONNEL WILL VOID ALL WARRANTIES.
2

Specifications
Power
Voltage
Amps (1 phase)
Amps (3 phase)
22 kW
440 VAC
50 Amps
43.3; 25; 25
Capacity
Weight
Ship Weight
Ship Dimensions
50 Lb. Oil
138 lb.
170 lb.
41” X 36” X 18”
3