Lang Manufacturing LRPR-2 Service Manual

Installation, Operation, & Maintenance

Model: LRPR-2,

Electric Lang Proofer / 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................................................................................... 6

EQUIPMENT DESCRIPTION ............................................................................. 7

GENERAL DESCRIPTION ................................................................................. 8

GENERAL OPERATION..................................................................................... 9

GENERAL MAINTENANCE .............................................................................. 10

ASSEMBLY.......................................................................................................... 11

INSTALLATION.................................................................................................. 30

WIRING DIAGRAMS.......................................................................................... 31

PARTS LIST ......................................................................................................... 32

WARRANTY........................................................................................................ 37

IMPORTANT READ FIRST IMPORTANT

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.

THE LANG LRP SERIES PROOFER PRODUCES HUMIDITY WHICH WILL NATURALLY CONDENSE AND ACCUMULATE WATER ON THE INTERIOR FLOOR CAUSING IT TO BECOME SLIPPERY. ADJACENT EXTERIOR FLOOR MAY ALSO BECOME SLIPPERY. USE EXTREME CAUTION WHEN WALKING IN OR AROUND THIS APPLIANCE.

DANGER

NOTICE

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

For best results- Always allow your proofer to reach set temperature and humidity before putting product in.

For best results- Proof at lower temperatures rather than higher.

To dry proof: Set humidity to the lowest setting (either 45% or less). At this setting the humidity generator is turned off and will not produce humidity.

When the actual humidity is less than 46% display will show 45. When the actual humidity is higher than 45%, display will show the actual humidity.

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

The Proof mode will operate without using the timer if continuous proofing 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.

NOTICE

WARNING

ETL File E8138 Rev. A 2001

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.

IMPORTANT READ FIRST IMPORTANT

CAUTION

WARNING

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.

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 LRP Proofer 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

LRPR2

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

Interior

LRPR2

• The Proofer / 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.

Air-Duct(s)

Each proofer comes with one or two air ducts. These air ducts perform the tasks of heating, humidifying and circulating the air within the unit. Each duct contains a heater plate, spray nozzle, drain pan and fan.

Evaporator(s)

Each proofer 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 Proofer / Retarder is a controlled atmosphere chamber. Temperature and humidity can be set independently to meet your particular proofing and retarding needs. In Proof mode air temperature is increased as the air duct heater in energized. Humidity is increased as water is sprayed in the air duct. Air is circulated continuously to provide positive movement from bottom to top, creating a uniform distribution of warm, moist air in proof mode and cool air in retard mode.

Proofer Theory

Retarder Theory

ETL File E8138 Rev. A 2001

GENERAL OPERATION

DANGER

NOTICE

Controls

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

For best results- Always allow your proofer to reach set temperature and humidity before putting product in.

For best results- Proof at lower temperatures rather than higher.

To dry proof: Set humidity to the lowest setting (either 45% or less). At this setting the humidity generator is turned off and will not produce humidity.

When the actual humidity is less than 46% display will show 45. When the actual humidity is higher than 45%, display will show the actual humidity.

SETTING TIME

1. Press and hold the “Start / Stop” for 3-seconds.

2. Using the “Up”(10 minute increments) arrow or the “Down” (1 minute increments) arrows set the time.

RETARDER OPERATION (Unit will run in retard mode only)

1. Press “Retard” button, the Retarder side of the controls will come 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 Proofer / Retarder.

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

8. When buzzer sounds, press stop button and remove product from Proofer / 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 OPERATION

POOFER OPERATION (Unit will run in proof mode only)

10. Press “Proof” button, the Proofer side of the controls will come on.

11. Press “Temp.” button.

12. Set temperature to desired temperature (70°F-120°F) using the “Up” or “Down” buttons.

13. Press “Humidity” button

14. Set Humidity to desired humidity (50%-100%) using the “Up” or “Down” buttons.

15. Press the “Timer” button.

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

17. Place product in Proofer.

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

19. When buzzer sounds, press stop button and remove product from Proofer.

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

21. To check actual humidity press “Humidity.” button twice. Flashing display will indicate actual Humidity.

NOTICE

AUTOMATIC OPERATION (Unit will run in retard mode until a set time and then proof)

The Proof mode will operate without using the timer if continuous proofing is desired.

1. Turn the Proofer / Retarder on and start the proof mode.

2. Set the desired proofing temperature and humidity.

3. To set Proofer start time, press and hold “Start / Stop” & “Proof” button at the same time for 3 seconds.

4. Set desired Proofer start time using “Up” and “Down” arrows.

5. Next set the slack time (or the time between when it exits Retarder mode and enters Proofer mode) To set slack time,

press and hold “Start / Stop” & “Automatic” button at the same time for 3 seconds.

6. Set desired slack time using “Up” and “Down” arrows. Example: A 90 minute slack time will read as 1:30 for one

hour and 30 minutes.

7. Place product in Proofer / Retarder and press the Automatic button. The unit will automatically go into Retarder

Mode. If for example it was 5:00pm and if the Proofer start time was 4:30am and if the slack time was 90 minutes. The unit would be in Retarder mode all night until 3:00am, then the unit would turn off and the temperature would slowly rise, and at 4:30 am the unit would start into Proofer mode.

ETL File E8138 Rev. A 2001

WARNING

GENERAL MAINTENANCE

NOTICE

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

Every Day

Clean interior and exterior of proofer.

Every Six Months

Have factory authorized service personnel check proofer for proper temperature readings, air duct drain, heater plate, spray nozzle.

As Needed

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

Specifications

Temperature, humidity, and timer setting ranges:

Thaw:

70-120°F (18-66°C)

50-95% Relative Humidity

Proof:

Retard:

Timers:

Power:

Water:

ETL File E8138 Rev. A 2001

70-120°F (18-46°C)

50-95% Relative Humidity

34°-45°F (1°-8°C)

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).

.73 gallons per hour maximum per air duct (2 ducts maximum) @ 30 PSI.

1.70 gallons per hour maximum per air duct (2 ducts maximum) @ 80 PSI.

Pre-Installation

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

No electrical junction boxes will be under the floor of the Proofer Ceiling height above the Proofer 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 Proofer to load and unload racks. Local and national codes will require an electrical shut-off within a reasonable distance to the Proofer.

ASSEMBLY

ETL File E8138 Rev. A 2001

+ 25 hidden pages

Lang Manufacturing LRPR-2 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

SAFETY PROCEEDURES

EQUIPMENT DESCRIPTION

GENERAL DESCRIPTION

GENERAL OPERATION

GENERAL MAINTENANCE

ASSEMBLY