Lang Manufacturing LRR-2 Service Manual

Installation, Operation, & Maintenance

Model: LRR-2,

Electric Lang Retarder Series

THE INFORMATION IN THIS MANUAL IS CRUCIAL AND MUST BE RETAINED FOR FUTURE REFERENCE. READ, UNDERSTAND AND FOLLOW THE INSTRUCTIONS AND WARNINGS CONTAINED IN THIS MANUAL.

DANGER

WARNING

CAUTION

NOTICE

POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD RESULT IN DEATH.

POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY.

POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, MAY RESULT IN MINOR OR MODERATE INJURY.

Helpful operation and installation instructions and tips are present.

FOR YOUR SAFETY DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND 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.

Model #: Purchased From:

Serial #:

Location:

Date Purchased:

Purchase Order #:

Date Installed:

For Service, Call:

CHAPTER PAGE

TABLE OF CONTENTS ...................................................................................... 3

READ FIRST ........................................................................................................ 4

SAFETY PROCEEDURES................................................................................... 5

EQUIPMENT DESCRIPTION ............................................................................. 6

GENERAL DESCRIPTION ................................................................................. 7

GENERAL OPERATION..................................................................................... 8

GENERAL MAINTENANCE .............................................................................. 9

ASSEMBLY.......................................................................................................... 9

INSTALLATION.................................................................................................. 24

WIRING DIAGRAMS.......................................................................................... 25

PARTS LIST ......................................................................................................... 26

WARRANTY........................................................................................................ 29

IMPORTANT READ FIRST IMPORTANT

WARNING

DANGER

MOVING PARTS HAZARD. FOLLOW LOCKOUT PROCEDURES BEFORE REMOVING AIR DUCT OR EVAPORATOR FAN GUARDS

ELECTRICAL HAZARD BEHIND UPPER FRONT TRIM. FOLLOW LOCKOUT PROCEDURES BEFORE SERVICING.

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

NOTICE

CAUTION

NOTICE

WARNING

CAUTION

The Retard mode will operate without using the timer if continuous retarding is desired.

Service on this or any other LANG equipment must be performed by qualified personnel only. Consult your authorized service agency directory or call the factory at 1-800-224-LANG (5264), or

WWW.LANGWORLD.COM for the service agency nearest you

A qualified & licensed refrigeration mechanic must perform connection, evaluation & charging of refrigeration lines. The condenser unit, if supplied, is recharged, but additional refrigerant may be required.

THE ADHESIVE WILL NOT RELEASE FOR A SECOND TRY.

For units needing more than one piece of trim to span one side, join the two pieces by overlapping with the ceiling trim cap.

TO REDUCE THE RISK OF FIRE, THE APPLIANCE IS TO BE MOUNTED ON FLOORS OF NON-COMBUSTIBLE CONSTRUCTION WITH NONCOMBUSTIBLE FLOORING AND SURFACE FINISH AND WITH NO COMBUSTIBLE MATERIAL AGAINST THE UNDERSIDE THEREOF, OR ON NON-COMBUSTIBLE SLABS OR ARCHES HAVING NO COMBUSTIBLE MATERIAL AGAINST THE UNDERSIDE THEREOF. SUCH CONSTRUCTION SHALL IN ALL CASES EXTEND NOT LESS THAN 12 INCHES BEYOND THE EQUIPMENT ON ALL SIDES.

THIS APPLIANCE, WHEN INSTALLED, MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL CODES, OR IN THE ABSENCE OF LOCAL CODES, WITH THE NATIONAL ELECTRICAL CODE, ANSI/NFPA 70-1996.

CAUTION

WARNING

FOR INSTALLATION IN CANADA THE INSTALLATION MUST BE IN ACCORDANCE WITH CAN/CGA-B149.1&2 OF THE INSTALLATION CODE, AND LOCAL CODES WHERE APPLICABLE. ALL ELECTRIC WIRING MUST BE IN ACCORDANCE WITH THE CURRENT CANADIAN ELECTRICAL CODE, C22.1 PART 1. GROUNDING THIS APPLIANCE MUST CONFORM TO CANADIAN ELECTRICAL CODE, CSA C22.2.

INSTALLATION OF THE UNIT MUST BE DONE BY PERSONNEL QUALIFIED TO WORK WITH ELECTRICITY AND PLUMBING IMPROPER INSTALLATION CAN CAUSE INJURY TO PERSONNEL AND /OR DAMAGE TO EQUIMENT. UNIT MUST BE INSTALLED IN ACCORDANCE WITH ALL APPLICAL CODES

ETL File E8138 Rev. A 2001

SAFETY PROCEEDURES

WARNING

MOVING PARTS HAZARD. FOLLOW LOCKOUT PROCEDURES BEFORE REMOVING AIR DUCT OR EVAPORATOR FAN GUARDS

ELECTRICAL HAZARD BEHIND UPPER FRONT TRIM. FOLLOW LOCKOUT PROCEDURES BEFORE SERVICING.

Lockout Procedure

1. Announce lockout to other personnel.

2. Turn both heat and control power off at main panel.

3. Clear unit of all personnel.

4. Test lockout by turning power switch on and observing if control panel displays or fan(s) come on. Check heater circuit with voltmeter.

5. Perform necessary repairs or tests.

6. Clear unit of personnel before restarting.

7. Turn power on at main panel.

8. Announce unit is “on” to other personnel.

Safety Precautions

The Manufacturer, Lang Manufacturing, hereby disclaims any and all responsibility for injury, damage, loss or other claim that may occur to person or property from improper alteration, modification, addition, operation, maintenance or service, whether it be mechanical, electrical, fuel, operator motor or otherwise, which may occur from such improper alteration, modification, addition, operation, maintenance or service to this piece of equipment.

Safety Considerations

Your Lang LRR Retarder is manufactured to rigid standards. This equipment is E.T.L. listed and meets safety and sanitation standards.

The presence of safety equipment control and interlocks on an appliance and attendant components of installation cannot in and of themselves, assure absolute safety of operation. Diligent, capable, well trained operators and maintenance personnel, as well as proper programs of operation and maintenance, are essential to the safe and reliable operation of this appliance.

A. The responsibility of the manufacturer

recommendations for the operation and maintenance of the appliance.

B. Trained qualified and factory-authorized personnel must perform all operation, maintenance and

repair of these appliances. It is the responsibility of the owner / operator happens.

C. A regular periodic program of cleaning, inspection and maintenance must be established and

comprehensive maintenance records maintained. It is the sole responsibility of the user schedule and enforce the frequency and scope of these programs in keeping with recommended practice and with due consideration given to actual operating conditions.

D. The appliance must be operated within the limits, which will not exceed the working limits of

any component within the appliance as a whole.

is to supply suitable, comprehensive instructions and

to ensure that this

to establish,

ETL File E8138 Rev. A 2001

EQUIPMENT DESCRIPTION

Exterior

LRR2

• The Retarder exterior dimensions are 78.8” (200 cm) wide x 91.5” (232.5 cm) high x depth is dependent upon model number [39.3”(100 cm) to 129.3” (328.5cm)]. The Top, Front, Back, and Sides are constructed of stainless steel.

All Units

• Modular design allows for a wide variety of sizes.

• The retarder door is constructed of stainless steel and comes with both single and double doors.

Interior

LRR2

• The Retarder interior dimensions are 68.1” (173 cm) wide x 74.1” (188.25 cm) high x depth is dependent upon model number [27.1”(68.8 cm) to 117.1” (297.4 cm)]. The Top, Front, Back, and Sides are constructed of stainless steel.

All Units

• Floor level loading.

Cabinet

Rigid, formed stainless steel panels filled with polyurethane foam insulation re-joined with camlocks and sealed with gaskets to form a strong, energy efficient, tight and sanitary enclosure.

Doors

The welded stainless steel doors are polyurethane foam-filled. Door bumpers on the inside protect the finish.

Controls

• The microprocessor based digital controls are mounted for ease in the right-hand door. Power and light switches are located above the left hand door.

• Digital read-out with solid-state temperature sensing and controls.

Evaporator(s)

Each Retarder retarder comes with one or two evaporators. These evaporators perform the task of cooling the interior of the unit, while maintaining a relatively high level of humidity. The evaporators, manufactured by Russell, consist of refrigeration coils, a thermal expansion valve, and a fan.

Condensing Unit

The condensing unit may or may not be provided with the system. Customers may choose to run off of a remote refrigeration system. If used, the condensing unit consists of a compressor, a fan, a receiver, a line drier and a solenoid valve. If the condensing unit is not used, the solenoid valve will still be provided to control unit cooling.

ETL File E8138 Rev. A 2001

GENERAL DESCRIPTION

Theory of Operation

The Lang Retarder is a controlled atmosphere chamber. Temperature can be set independently to meet your retarding needs. Air is circulated continuously to provide positive movement from bottom to top, creating a uniform distribution cool air.

Retarder Theory

ETL File E8138 Rev. A 2001

GENERAL OPERATION

DANGER

Controls

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

RETARDER OPERATION

1. Turn Retarder on.

2. Press “Temp.” button.

3. Set temperature to desired temperature (34°F-45°F) using the “Up” or “Down” buttons.

4. Press the “Timer” button.

5. Set time to desired time using the “Up” or “Down” buttons.

6. Place product in the Retarder.

7. Press “Start / Stop” button and timer will begin counting down.

8. When buzzer sounds, press stop button and remove product from Retarder.

9. To check actual temperature press “Temp.” button twice. Flashing display will indicate actual temp.

NOTICE

ETL File E8138 Rev. A 2001

The Retard mode will operate without using the timer if continuous retarding is desired.

GENERAL MAINTENANCE

NOTICE

Every Day

Clean interior and exterior of retarder.

Every Six Months

Have factory authorized service personnel check Retarder for proper temperature readings, and evaporator drain.

As Needed

Clean interior and exterior walls and replace light bulb or any other components as needed.

Specifications

Temperature, humidity, and timer setting ranges:

Retard:

Service on this or any other LANG equipment must be performed by qualified personnel only. Consult your authorized service agency directory or call the factory at 1-800-224-LANG (5264), or WWW.LANGWORLD.COM for the service agency nearest you

34°-45°F (1°-8°C)

Timers:

Power:

0-99 Hours and 0-59 Minutes

Varies depending on model and size (See data plate located on the underside of the valence for the specific ratings or contact the factory for the information needed if the data plate is not legible).

Pre-Installation

Check the area where the Retarder is to be installed for the following:

No electrical junction boxes will be under the floor of the Retarder Ceiling height above the Retarder should be sufficient to allow for installation. The minimum height needed for installation is 95 inches. Access is needed for an air-gap drain in any of the four corners. Adequate space is needed in front of the Retarder to load and unload racks. Local and national codes will require an electrical shut-off within a reasonable distance to the Retarder.

ASSEMBLY

ETL File E8138 Rev. A 2001

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