Lang USN-50 Service Manual

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: [phone]

May 30, 2008, Rev B

WWW.STAR-MFG.COM

Table Of Contents

Table Of Contents...........................................................................................................0

Warnings.......................................................................................................................... 1

Specifications..................................................................................................................2

Installation Instructions .................................................................................................3

DATAPLATE........................................................................................................................................3

ELECTRICAL SERVICE ENTRANCE......................................................................................................3

SAFETY CIRCUIT CONNECTIONS........................................................................................................3

Operating Instructions ................................................................................................... 4

FILL LEVELS.......................................................................................................................................4

CONTROLS..........................................................................................................................................4

Operating Instructions cont’d........................................................................................ 5

LIMITING CONTROL TEST SWITCH.....................................................................................................5

Operating Instructions cont’d........................................................................................ 6

HEATING ELEMENTS...........................................................................................................................6

DRAINING THE FRYER OIL...................................................................................................................6

Maintenance Instructions............................................................................................... 7

FRYER CLEANING...............................................................................................................................7

TEMPERATURE CONTROL...................................................................................................................7

OVER-TEMPERATURE PROTECTION...................................................................................................7

MAINTENANCE INSTRUCTIONS CONT’D..................................................................... 8

THERMOSTAT BULBS CHECK.............................................................................................................8

COMPONENT ACCESS.........................................................................................................................8

TECHNICAL SUPPORT.........................................................................................................................8

CALIBRATION..................................................................................................................................... 8

Maintenance Instructions cont’d................................................................................... 9

A. CHECKING TEMPERATURE............................................................................................9

B. ACCESSING THE TEMPERATURE CONTROL COMPONENTS.....................................9

Maintenance Instructions cont’d................................................................................. 10

C. TESTING TEMPERATURE SENSE PROBE....................................................................10

Maintenance Instructions cont’d................................................................................. 11

D.TESTING TEMPERATURE SELECTOR SWITCH..................................................................11

E CALIBRATION OF TEMPERATURE CONTROL BOARD..............................................11

Wire Diagram................................................................................................................. 12

Parts List........................................................................................................................13

Star Manufacturing

10 Sunnen Drive, St. Louis, Mo. 63143
For Parts And Technical Support Call:

Toll Free: PH 800-807-9054
Direct Line: PH: 314-781-2700
Fax Number: PH: 314-781-2714

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.

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”

Installation Instructions

Data plate

Check the data plate located on the back of the machine for fryer electrical rating.
Check power source to insure that it is the correct voltage and current rating.

Electrical Service Entrance

Electrical service may be made through a standard 1¼ inch conduit. A hole is provided
through the rear panel. A knockout is also provided in the bottom rear of the fryer, so
that power may be brought in from below the unit. Plug the hole on the rear panel when
using bottom power entry. Check the National Electrical Code for fuse for circuit breaker
requirements.

Safety Circuit Connections

Fire Control Shutoff

A four pole terminal block is provided behind the rear access cover for connection to an
external fire control system if required. A jumper is provided across two of these
terminals when the fryer leaves the factory. The jumper on this terminal block is in
series with the power switch circuit. If connection to a fire control system is required,
remove this jumper and supply a relay contact closure to maintain this closed circuit. If
the fire control system does not have this type output, a separate relay must be provided
to interface the system. DO NOT APPLY VOLTAGE TO THIS CONNECTION.

Shunt Trip Circuit

Two terminals are provided on the four pole terminal block for a shunt trip circuit.
Connect your 115 volt shunt trip circuit to these terminals.

Phasing And Ground Connection

Connect a ground lead to the green ground lug provided in the rear compartment.
These fryers may be connected to either single or three phase power as indicated in the
table below:

SERVICE CONNECTION AMPS PER LINE @ 440VAC

Three L1

Phase L2

L3

Single L1

PHASE L2

1 & 4
2 & a 43.3 25 25

3 & B
1, 3, a 50 50
2, 4, B

L1 L2 L3