Lang LRP-3 User manual

Brand: Lang

Model: LRP-3

Type: User manual

Lang LRP-3 is a controlled humidity proofer designed to provide the ideal environment for proofing dough. It features a microprocessor-based digital control system, stainless steel construction, and a variety of sizes to accommodate different production needs. The LRP-3 is easy to use and maintain, making it a great choice for bakeries of all sizes.

Lang Manufacturing Company 6500 Merrill Creek Parkway Everett, WA 98203

Part # 60806-09 Phone: 425-349-2400 Fax: 425-349-2733

Installation, Operation, & Maintenance

Model: LRP-3,

Electric Lang Proofer Series

Lang Manufacturing Company 6500 Merrill Creek Parkway Everett, WA 98203

Part # 60806-09 Phone: 425-349-2400 Fax: 425-349-2733

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

POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT

AVOIDED, COULD RESULT IN DEATH.

WARNING

POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT

AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY.

CAUTION

POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT

AVOIDED, MAY RESULT IN MINOR OR MODERATE INJURY.

NOTICE

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:

Date Installed:

Purchase Order #:

For Service, Call:

TABLE OF CONTENTS

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

ETL File E8138 Rev. A 2001

IMPORTANT READ FIRST IMPORTANT

WARNING

MOVING PARTS HAZARD. FOLLOW LOCKOUT PROCEDURES BEFORE

REMOVING AIR DUCT OR EVAPORATOR FAN GUARDS

WARNING

ELECTRICAL HAZARD BEHIND UPPER FRONT TRIM. FOLLOW LOCKOUT

PROCEDURES BEFORE SERVICING.

WARNING

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

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR

LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

NOTICE

For best results- Always allow your proofer to reach set temperature and

humidity before putting product in.

NOTICE

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

NOTICE

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.

NOTICE

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.

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

NOTICE

For units needing more than one piece of trim to span one side, join the

two pieces by overlapping with the ceiling trim cap.

WARNING

TO REDUCE THE RISK OF FIRE, THE APPLIANCE IS TO BE MOUNTED ON

FLOORS OF NON-COMBUSTIBLE CONSTRUCTION WITH NON-

COMBUSTIBLE 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.

CAUTION

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

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.

ETL File E8138 Rev. A 2001

IMPORTANT READ FIRST IMPORTANT

WARNING

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

WARNING

ELECTRICAL HAZARD BEHIND UPPER FRONT TRIM. FOLLOW LOCKOUT

PROCEDURES BEFORE SERVICING.

WARNING

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.

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

is to supply suitable, comprehensive instructions and

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

to ensure that this

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

to establish,

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.

ETL File E8138 Rev. A 2001

EQUIPMENT DESCRIPTION

Exterior

LRP-3

• The Proofer exterior dimensions are 102.5” (260 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

LRP-3

• The Proofer interior dimensions are 91.8” (233cm) 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 left-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.

ETL File E8138 Rev. A 2001

GENERAL DESCRIPTION

Theory of Operation

The Lang Proofer is a controlled atmosphere chamber. Temperature and humidity can be set

independently to meet your particular proofing needs. The 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.

ETL File E8138 Rev. A 2001

GENERAL OPERATION

DANGER

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS OR

LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

NOTICE

For best results- Always allow your proofer to reach set temperature and

humidity before putting product in.

NOTICE

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

NOTICE

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.

NOTICE

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.

Controls

BASIC OPERATION

1. Turn power switch to “ON” position.

2. Press “Temp.” button.

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

4. Press “Humidity” button

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

6. Press “Timer” button.

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

8. Place product in proofer.

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

10. When buzzer sounds, press stop button and remove product from proofer.

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

temp.

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

Humidity.

ETL File E8138 Rev. A 2001

GENERAL MAINTENANCE

WARNING

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.

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:

70-120°F (18-46°C)

50-95% Relative Humidity

Timers:

0-99 Hours and 0-59 Minutes

Power:

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).

Water:

.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.

ETL File E8138 Rev. A 2001

ASSEMBLY

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.

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Step 1

Install the floor (optional) and base channels:

• Locate the correct position of the proofer. Clean the floor and adjacent wall space to remove any obstruction. Note:

If a floor is included with the proofer, it may be desirable to remove any floor tile that may become loose over time.

• Place the stainless steel floor on the floor and mark the edges with a non-permanent marker. Note: The stainless

steel floor has several holes along the door opening. Remove stainless steel floor. Apply several beads of floor

adhesive to the floor and spread with the trowel provided. Get a good continuous bead near the edge of the floor.

• Place the stainless steel floor back in position and gently walk the stainless steel floor down on the adhesive. Place a

few weights such as a toolbox or crating on the stainless steel floor to keep it in intimate contact with the adhesive

and the floor beneath.

• Place the wall base channels in position and align with the outside edge of the stainless steel floor, over the holes in

the stainless steel floor.

• Drill the floor through the wall base channels with a 3/8” diameter drill to accept the concrete floor anchors.

o Mark the drill bit at 1-1/2 inches from the end with tape. Drill until the mark is at the top of the stainless steel

floor. Do not drill too deep.

o Clean the holes of concrete dust.

o If the proofer is mounted on stone or ceramic tile, extend the holes and the anchors into the concrete substrate.

• Install the anchors in the holes and set in place with the anchor-setting tool. (Note: One good solid blow is better

than many little taps.)

• Repeat this procedure at the front edge of the floor. Do not drill holes for the corner cove anchors (four additional

holes located inside the walls) at this time.

• Install the ¼-20 flat head screws in the anchors. Additional Screws have been provided in the event that a hole is

drilled too deep.

Illustration 1

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Illustration 1.5

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Step 2

• Assemble the walls:

• Place the left rear wall corner in the wall base channel.

Note: Remove the vinyl coating from the panels as you install them if there is no access to the surface later.

• Place one 20-inch wide wall panel next to the corner panel in the rear wall base channel. Remove paper

cover from wall gasket. Rotate the cam latches in the rear wall to the fully retracted position and then

fully engaged position to lock the corner and the panel together. Note: take extra care to align the top

edges of the panels and the inner face of the panels as you lock them together. The panels may tend to

move as you tighten the locks. Be sure the gasket material is in place and is not protruding.

• Install the right rear corner panel and the remainder of the panels, including the left and right jambs.

• Level the proofer by installing shims under the wall panels at the corners. Additional shims may be

needed along the walls for larger proofers. Be sure that the front jambs are vertical and parallel, and

that the top edge of both jambs are at the same height.

• Install the header between the jambs. Be sure the header is aligned with the tops of the jambs and the

front plane of the jambs. Note: this step is critical in getting the door(s) to hang straight.

Illustration 2

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Step 3

Assemble the ceiling:

• Place the rear-ceiling panel on top of the walls at the rear of the proofer, with the stainless steel side

down. Be sure to remove the vinyl coating from the panel and paper from the gaskets.

• Place the 20-inch and 10-inch ceiling panels in place. Lock the panels together with the cam latches,

using care to keep the edges aligned.

• Place the front ceiling panel in place and lock to the adjacent panel.

• Square up the ceiling and align the side and rear panels with the edges of the ceiling panels.

• Install a ¼ by 3” self-drilling hex head screw. Repeat along the rear wall, keeping the walls and the

ceiling aligned.

Illustration 3

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Step 4

Install the doors:

• Install the door hinges to the doorjambs using ¼-20 flat head stainless steel screws provided. Note:

left and right hand hinges are not interchangeable.

• Install the hinges on the doors using ¼-20 flat head machine screws. Install the door bottom seal and

clamp strip using #10 by ¾ stainless steel sheet metal screws. On two door proofers, install the center

lap strip in the same manner.

• Install the door closure hook on the door using #8 x 1 stainless steel sheet metal screws provided.

• Place the doors on the hinge pins and lower into place.

• Install the door handle using ¼-20 by 3”, round head stainless steel machine screws and ¼ flat

washers.

• Install the door closure mechanism(s) on the back of the header using #8 x 1 stainless steel sheet

metal screws provided. Close the door and check clearances and the door mechanism action. The

door should be pulled closed when the mechanism comes in contact with the hook.

• Close the doors and check the door fit. The doors should seal around the perimeter to the header and

the doorjambs. The doors should match at the top edge. To adjust, loosen the cam latches at the

header and shim the walls until the doors align. Tighten the cam latches.

Illustration 4

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Step 5

Install the heat duct:

• Remove the upper and lower covers and fan guard from the air duct.

• Install the hanger strip on the right side of the air duct using ¼-20 by 5/8-truss head machine screw.

• Place the duct in position and mark through the mounting holes. The air duct should be installed in

the front left corner on two-door proofers and at the rear wall, tight to the left corner, for the single-

door proofer. For deep double-door proofers requiring an extra air duct, the second one is to be

installed on the same wall as the first, and against the rear corner.

• Drill and tap the walls at the marked locations using #20 drill bit and 10-32 tap.

• Install the air duct using 10-32 by 3/8 truss head stainless steel machine screws. Install an insulating

bushing in the ceiling holes and push the heat and motor wires through the bushings.

Illustration 5

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Illustration 5.1

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Step 6

Install the Vallence:

• Be sure that foam tape is on all surfaces of contact between the valence and the body.

• Place valence in place and install using ¼-20x5/8 screws.

• Install 10-32 screws at the bottom flange of the valance into the header panel, from inside the valance

(will be necessary to reach in from above).

• Insert toggle switch into valence and tighten from inside with the rubber caps. Light switch should be

on the right and power on the left.

• Place cover on top of valence and install using 10-32 x 3/8 screw (cover can be added after wiring is

complete).

Illustration 6

ETL File E8138 Rev. A 2001

ASSEMBLY CONT’D

Step 7

Plumbing:

• Route water delivery tube though ceiling panel. Connect top end to 90° elbow from the solenoid

valve. Bottom end connects to the spray nozzle as shown.

• Cut pipe so that drain is in desired position in the rear of the proofer.

• Place drain bumper over the drain tube and mark holes. Drill #21 and tap 10-32. Install with10-32

screws.

Illustration 7

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Lang LRP-3 User manual

Lang LRP-3 User manual

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