Lang LRO-2G Service Manual

Installation, Operation, Maintenance, & Troubleshooting

Model: LRO-2G,

Rack Oven

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

FOR YOUR SAFETY

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

POST IN A PROMINENT LOCATION:

INSTRUCTIONS TO BE FOLLOWED IN THE EVENT USER SMELLS GAS. THIS INFORMATION SHALL BE OBTAINED BY CONSULTING YOUR LOCAL GAS SUPPLIER. AS A MINIMUM, TURN OFF THE GAS AND CALL YOUR GAS COMPANY AND YOUR AUTHORIZED SERVICE AGENT. EVACUATE ALL PERSONNEL FROM THE AREA.

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 #:

Date Purchased:

Purchase Order #:

Location:

Date Installed:

For Service, Call:

ETL File 3028821 2 Rev. #A2002

CHAPTER PAGE

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

2. WARNING..................................................................................................... 4

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

4. INSTALLATION INSTRUCTIONS ............................................................. 10

5. EMERGENCY OPERATION ....................................................................... 17

6. GENERAL OPERATION.............................................................................. 18

7. PROGRAMMING.......................................................................................... 20

8. GENERAL MAINTENANCE ....................................................................... 24

9. SAFETY CONSIDERATIONS ..................................................................... 27

10. ILLUSTRATED PARTS BREAKDOWN..................................................... 28

11. WIRING DIAGRAMS................................................................................... 37

12. WARRANTY................................................................................................. 39

ETL File 3028821 3 Rev. #A2002

WARNING THE WATER FROM THE STEAM DRAIN OUTLET IS EXTREMELY

HOT AND MAY CAUSE SERIOUS BURNS.

NOTICE Left rear drain point is provided and should be routed to a floor

drain. A 1” gap must be provided between oven drain and floor drain.

WARNING WIRES ENTERING THE DISCONNECT MAY STILL BE LIVE EVEN

WHEN THE SWITCH IS TURNED OFF. SWITCH THE MAIN BREAKER AT THE WALL TO “OFF” WHEN SERVICING THE OVEN

WARNING

TO REDUCE THE RISK OF FIRE, THE APPLIANCE IS TO BE MOUNTED ON FLOORS OF NON-COMBUSTIBLE CONSTRUCTION. SUCH CONSTRUCTION SHALL EXTEND A MINIMUM OF 12-INCHES BEYOND THE EQUIPMENT ON ALL SIDES.

WARNINGS

PG. 8

PG. 10

CAUTION

CAUTION THIS APPLIANCE, WHEN INSTALLED, MUST BE ELECTRICALLY

CAUTION FOR INSTALLATION IN CANADA THE INSTALLATION MUST BE

WARNING

INSTALLATION MUST CONFORM WITH LOCAL CODES, OR IN THE ABSENCE OF LOCAL CODES WITH THE NATIONAL FUEL GAS CODE, ANSIZ223.11996.

GROUNDED IN ACCORDANCE WITH LOCAL CODES, OR IN THE ABSENCE OF LOCAL CODES, WITH THE NATIONAL ELECTRICAL CODE, ANSI/NFPA 70-1996.

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 EQUIPMENT. UNIT MUST BE INSTALLED N ACCORDANCE WITH ALL APPLICABLE CODES.

DO NOT ALLOW ANY PART OF YOUR BODY TO BE UNDER THE OVEN DURING THE LIFTING PROCESS. KEEP EVERYONE

CLEAR FORM THE OVEN IF IT SHOULD FALL.

PG. 10

PG. 11

NOTICE Always ensure the grease filters supplied with the oven are

used. Replacement filters may be obtained from a Lang representative.

NOTICE It is imperative that a mechanical exhauster is installed, and a

pressure sensitive switch is installed at the collar of the hood. If a negative draw of 0.4” for LRO-2G or 0.6” W.C. is not achieved, the burner will not come on.

ETL File 3028821 4 Rev. #A2002

PG. 14

WARNINGS CONT’D

NOTICE No other exhaust systems may be connected to this system. Do

not try to vent or exhaust another appliance into this hood.

NOTICE

WARNING

NOTICE

WARNING

Do not allow more than 14 inches pressure to be applied to the gas valve at any time.

WHEN REMOVING THE RACK OR PRODUCT FROM THE RACK WHERE OVEN MITTS TO AVOID SERIOUS BURNS.

DO NOT UNLOAD THE RACK FROM THE OVEN WHILE THE CARRIER IS IN THE LIFT POSITION. LOADED RACKS CAN BE EXTREMELY HEAVY.

DO NOT REMOVE A FLAMING PRODUCT FROM THE OVEN. SEVERE BURNS AND PROPERTY DAMAGE CAN RESULT.

THIS LANG OVEN PRODUCES HUMIDITY THAT CAN CAUSE THE INTERIOR FLOORING AND ADJACENT EXTERIOR FLOORING TO BECOME SLIPPERY. USE EXTREME CAUTION WHEN WALKING ON A WET OR DAMP FLOOR.

The temperature outside the oven should not exceed 104° F (40° C). This includes the temperature of the air above and around the oven.

IF BURNER DOES NOT LIGHT, TURN OFF POWER SWITCH, MANUAL GAS SHUT-OFF VALVE AND BURNER GAS SHUT-OFF VALVE. WAIT A MINIMUM OF 5 MINUTES, AND THEN REPEAT STEP 1 ABOVE. BURNER SHOULD NOW START. IF NOT, CALL FOR SERVICE.

PG. 14

PG. 16

PG. 17

NOTICE During the first few hours of operation you may notice a small

amount of smoke coming off of the oven, and a faint odor from the smoke. This is normal for a new oven and will disappear after the first few hours of use.

WARNING

NOTICE It is not necessary to press the start button for the oven to begin

NOTICE The steam, vent and fan functions cannot be used together in

NOTICE

WHEN THE LOADING DOOR IS OPENED, HOT AIR AND STEAM ARE RELEASED FROM THE OVEN INTERIOR. TO AVOID BURNS OPEN DOOR SLOWLY AND KEEP YOUR FACE AND HANDS CLEAR OF THE OPENING. ALL INTERIOR SURFACES ARE VERY HOT. DO NOT TOUCH ANYTHING WITHOUT OVEN MITTS.

heating. Simply set the desired temperature and close the door.

the same step. Service on this, or any other, LANG appliance must be

performed by qualified personnel only. Consult your authorized service station directory or call the factory at 1-800-224-LANG (5264) or WWW. LANGWORLD.COM for the service station nearest you.

PG. 17

PG. 20

PG. 23

ETL File 3028821 5 Rev. #A2002

NOTICE

WARNINGS CONT’D

To maintain optimum safety and performance for LANG Rack oven models LRO-1G & LRO-2G, it is recommended that a program of scheduled periodic maintenance be implemented. It’s sole responsibility of the user to establish, schedule and enforce such a program. Although the actual service interval will vary depending on the environment in which the equipment is operating, it is recommended the following be done by a LANG authorized service agency at least every 6 months.

PG. 23

NOTICE

WARNING

NOTICE

CAUTION

For periodic maintenance and repairs, electrical diagrams are included in this manual and with the oven (on the back of the control door).

SINCE RESETS FOR THE CIRCULATION BLOWER MOTOR AND THE LIFTER MOTOR / ROTATOR MOTOR ARE AUTOMATIC, ALL POWER TO THE OVEN MUST BE TURNED OFF BEFORE SERVICING.

If shutter settings are to be adjusted differently than the recommended factory settings, the best results will be obtained if you (A) start with the factory settings, (B) close shutters to lighten a product in a given area- do not open shutters to darken a product, (C) do not move a shutter more than 1/32” or 1mm (see step gauge illustration) at any one time, (D) be sure all settings for left hand shutters match those for right hand shutters, and (E) do not adjust more than two shutters per side per time (four shutters total).

IF BLOWER ROTATION IS INCORRECT, IT WILL CAUSE SEVERE DAMAGE TO HEAT EXCHANGER

PG. 23

PG. 24

ETL File 3028821 6 Rev. #A2002

EQUIPMENT DESCRIPTION

Data Plate

On this plate you will find the oven model, serial number, electrical ratings, BTU’s, gas type, and clearance specification.

Exterior Construction:

The oven exterior dimensions are 72” (1829 mm) wide x 105” (2667 mm) high x 62” (1575 mm) Deep. The Top, front, Back and Sides are constructed of stainless steel with 5 inches of insulation.

The oven in designed for floor level loading.

Type I or Type II hood with single point exhaust connection complying with Uniform Mechanical Code and NFPA 96.

The oven door is constructed of stainless steel with a full height single pain window and an interior releasing mechanism.

The externally mounted florescent light provides excellent product visibility.

Interior Construction:

The oven cavity dimensions are 52” (1320 mm) wide x 75” (1905 mm) high x 52” (1320 mm) deep. The interior is constructed of stainless steel.

The rack carrier facilitates smooth and simple rack loading and unloading.

The rack lifter provides gentle rack lift and rotation, protecting delicate products.

The built-in steam generator generates steam quickly.

Oven air circulation is fully adjustable, providing even cooking.

Controls:

The large digital display is easy to understand and operate.

Pre-Programmable product selections simplify operation.

Step function allows for special menus.

Automated control functions include temperature, time, steam, vent, and fan delay.

Technical:

The oven requires a 120-volt single-phase power supply and a 208/240-volt three-phase power supply.

The oven requires a 3/4” NPT connection for gas.

The oven requires a 3/4” NPT connection for water.

The oven requires no clearance from combustible wall construction.

The oven can be heated by natural gas or propane at a heating rate of 290,00 BTU. The gas must be specified when ordering.

WARNING THE WATER FROM THE STEAM DRAIN OUTLET IS EXTREMELY

HOT AND MAY CAUSE SERIOUS BURNS.

Steam Drain Outlet

Water exits the steam generating system through this outlet. It is located at the left rear corner of the oven.

NOTICE

Left rear drain point is provided, route it to a floor drain. A 1” gap must be provided between oven drain and floor drain.

ETL File 3028821 7 Rev. #A2002

EQUIPMENT DESCRIPTION CONT’D

Floor Drain

This drain (customer supplied) receives the excess water from the steam generating system.

Rack Carrier

The rack carrier attaches to the top of the oven rack.

When the loading door is closed, the rack carrier lifts and rotates the oven rack.

Rack Stop

The two rack stops are located be on the carrier and secure the oven rack in place during baking. The leading edge of the forward stop must manually flipped down to unload the oven rack. The stop will automatically return to the up (loading) position when the rack is removed.

Hood

Steam and burner exhausts are discharged into the hood. Grease is channeled to and collected in a grease cup for later removal.

Hood Exhaust

Cooking fumes and burner exhaust pass through a duct to the hood exhaust outlet. A customer-supplied exhaust blower is required. The hood can be wired to the external device terminals in the service box. This insures the hood is on whenever the oven is on. The “POWER” switch on the oven control panel activates the blower. The blower must be running before the oven will operate. A factory installed airflow switch disables heat until airflow exists.

Interior Door Release

This door release allows the door to be opened from inside the oven.

120V Circuit Breakers

Power to run the control panel and hood blower can be disconnected at these points. Switch to “OFF”, when servicing oven or blower.

WARNING WIRES ENTERING THE DISCONNECT MAY STILL BE LIVE EVEN

Manual Gas Shutoff

Gas is supplied to the oven through this valve. This valve is typically left open, but needs to be closed when servicing the oven. To close the valve, turn its handle to a horizontal position.

3-Phase Circuit Breaker

This disconnect provides short circuit protection for the circulation blower motor. Switch to “ OFF” when servicing the oven.

WHEN THE SWITCH IS TURNED OFF. SWITCH THE MAIN BREAKER AT THE WALL TO “OFF” WHEN SERVICING THE OVEN

ETL File 3028821 8 Rev. #A2002

Circulation Blower

EQUIPMENT DESCRIPTION CONT’D

Vent Blower Oven Controls

ETL File 3028821 9 Rev. #A2002

INSTALLATION INSTRUCTIONS

WARNING

Receiving the Oven

Upon receipt, check for freight damage, both visible and concealed. Visible damage should be noted on the freight bill at the time of delivery and signed by the carrier's agent. Concealed loss or damage means loss or damage, which does not become apparent until the merchandise has been unpacked. If concealed loss or damage is discovered upon unpacking, make a written request for inspection by the carrier's agent within 15 days of delivery. All packing material must be kept for inspection. Do not return damaged merchandise to Lang Manufacturing Company. File your claim with the carrier.

Pre-Installation

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

• No electrical conduit or wires are to be under the floor of the oven.

• The oven must be mounted on a non-combustible surface. This includes the structure beneath the

floor.

• Ceiling height above the oven should be sufficient to allow servicing the lifter, vent and blower motor assemblies. The maximum height needed for tilting the oven up is 105 inches.

• Clear access is needed to the roof or exterior of the facility for hood exhaust. Check local codes for correct venting.

• Access is needed for an air-gap drain in the rear left corner of the oven.

• Adequate space is needed in front of the oven to load and unload racks. Racks are hot and need

space to cool.

• The oven needs air to operate. The hood exhaust will need at least 600-800 CFM of make-up air.

• Local and national codes will require an electrical shut-off within a reasonable distance to the oven.

• Local and National codes will require access to a manual Gas Shut-off.

• The door swing (46.0”) will need to be clear to allow adequate loading and unloading of the oven.

Check the space next to the oven and be sure it does not interfere with the door.

Un-Crating

TO REDUCE THE RISK OF FIRE, THE APPLIANCE IS TO BE MOUNTED ON FLOORS OF NON-COMBUSTIBLE CONSTRUCTION. SUCH CONSTRUCTION SHALL EXTEND A MINIMUM OF 12-INCHES BEYOND THE EQUIPMENT ON ALL SIDES.

The oven is shipped in two main pieces, not including hood.

Move the large oven crates into the room, near where it is to be installed. Allow clear access for a forklift or lifting apparatus at the top end of the oven. The bottom end of the oven crate is beveled at the skids.

Check the crate for damage that may have occurred in shipping.

Remove crating materials and plastic wrap from the oven. Remove the heat exchanger vent duct from the skid.

CAUTION

CAUTION THIS APPLIANCE, WHEN INSTALLED, MUST BE ELECTRICALLY

ETL File 3028821 10 Rev. #A2002

INSTALLATION MUST CONFORM WITH LOCAL CODES, OR IN THE ABSENCE OF LOCAL CODES WITH THE NATIONAL FUEL GAS CODE, ANSIZ223.11996.

GROUNDED IN ACCORDANCE WITH LOCAL CODES, OR IN THE ABSENCE OF LOCAL CODES, WITH THE NATIONAL ELECTRICAL CODE, ANSI/NFPA 70-1996.

INSTALLATION CONT’D

CAUTION FOR INSTALLATION IN CANADA THE INSTALLATION MUST BE

WARNING

Raising:

Raise the oven to its vertical, upright position with the use of a forklift or other lifting device. Lower the oven to the floor without dropping.

• Raise one end of each oven skid with a forklift until the oven is at 60° from horizontal. (If a forklift is not available, use a pallet jack and successive stacks of pallets to raise the oven. DO NOT LIFT THE OVEN BY HAND). Tilt the oven to the vertical position by hand from the raise position.

• Ease the oven to the floor and do not allow it to fall over. OVEN HALVES ARE UNSTABLE.

Assembly

Note: Nudge the halves with pry bars to move them. Do not force parts to fit.

• Move the erected oven halves to where the mating faces are 2-3 feet apart.

• Place the oven floor on the ground against the right wall of the oven and 6 inches forward of the rear

wall.

• Carefully raise the front edge of the right wall with a pry bar and slide the floor back until it touches the back wall.

• Slide the right half of the oven toward the left half until the two mate together.

• Bolt the inner skin together at the rear, top and front header using 5/16-18 gimlet point screws

provided.

• Install ½-13x1 hex head bolts, nuts, and lock washers at the joint in the rear base, rear top frame and header. Snug all bolts tight.

• Install the insulation provided at the center joint so that there are three layers and no voids.

• Slide the rear joint panel into the upper frame at the back of the oven and drop it into the lower

frame to close the back of the oven.

• Place the top insulation cover in place and secure it to the outer ceiling panel with the drill tip screws provided.

• Raise the front header cover into position between the front jambs and slip it over the header frame until it is flush with the front. Install two drill-tip screws through the top flange of the header cover. Install #10x¾ stainless steel sheet metal screws through the bottom flange of the header cover. Use care to keep the gasket in place.

• Install ¼-20x½” truss head stainless steel screws through the inner ceiling joint, inside the oven.

• Place the floor clamp strips around the inside walls of the oven. Install, using ¼-20x½” truss head

screws, washers and lock-washers, longer screws are provided for the overlapping joints at the corners. Do not tighten these screws until the oven has been placed at its final location and leveled.

DO NOT ALLOW ANY PART OF YOUR BODY TO BE UNDER THE OVEN DURING THE LIFTING PROCESS. KEEP EVERYONE CLEAR FROM THE OVEN IF IT SHOULD FALL.

ETL File 3028821 11 Rev. #A2002

INSTALLATION CONT’D

Assembly Cont’d

Note: Lifter installation is not required on some ovens

• Place the lifter assembly on top to the oven without the rotator assembly. Center the lifter over the rotator shaft housing with the lift motor to the rear of the oven.

• Install the rotator assembly through the lifter using care to locate the spring-steel clip between the elevation micro-switches.

• Move the lifter assembly around until the rotator assembly is clear of the lifter frame and all moving parts are free (this should be where the lifter is centered on the rotator shaft). Anchor the lifter assembly in place with the fasteners provided.

• Remove the snap ring, square washer and shipping spacer from the rotator shaft.

• Remove the rack carrier from the bottom of the hood crate. Install the carrier on the rotator shaft

inside the oven using the snap ring provided. Install the four set-screws in the carrier-shaft collar. Do not tighten yet, as this will allow the carrier to be aligned later.

• Install the end of the flex conduit from the blower motor into the lift frame.

• Uncoil the hi-limit switch from the hi-limit protector bracket and install in the side of the lifter frame

with the screws provided.

• Install the door micro-switch, (shipped wired to the lifter frame) at the door switch actuator bracket above the loading door. Adjust the switch for 1/8” over travel. Adjust the switch actuator for maximum travel.

• Connect the wires (34, 35 and 36) from the blower motor to the same wires in the lifter frame.

• Connect the wires (48 and 49) to the terminal at the high-limit switch.

• Connect the white plastic connector from the main harness to the white plastic connector on the

lifter harness.

• Check the location of all of the wires to ensure that they are free of sharp edges or moving parts.

• Install the transport wheel on the left jambs by raising the oven with the left front jackscrew, located

behind the control door, use the ¼-20 hex head bolts provided.

• Extend the transport wheel by adjusting the leveling jack screws in the rear.

ETL File 3028821 12 Rev. #A2002

INSTALLATION CONT’D

Setting

Remove the vinyl protective coating from all of the exterior surfaces.

Roll the oven into its final installed position. (You may wish to install the hood before locating the oven.)

Adjust the left front leveling screw until the weight is removed from the wheel assembly. Remove the wheel assembly.

For right hand doors; adjust the rear leveling screws and the left front leveling screws until the left jamb is level from left to right and front to back. Lock the left front adjusting screw in place.

Install the loading door.

• Remove the loading door from its crate.

• Stand the door up-right and move it into place with a hand truck.

• Raise the door hinges over the jamb hinges with the hand truck and lower in into place.

• Use care to avoid damaging the door seal.

Adjust the right front leveling screw until the gap at the top of the door opening is even all across. Check the gap along the left side of the door. Recheck the level of the oven.

For left hand doors adjust the rear leveling screws and the right front leveling screws until the right jamb is level from left to right and front to back. Lock the right front adjusting screw in place.

Install the loading door.

• Remove the loading door from its crate.

• Stand the door up-right and move it into place with a hand truck.

• Raise the door hinges over the jamb hinges with the hand truck and lower in into place.

• Use care to avoid damaging the door seal.

Adjust the left front leveling screw until the gap at the top of the door opening is even all across. Check the gap along the right side of the door. Recheck the level of the oven.

Loosen the floor clamp screws around the perimeter of the oven floor.

Walk around the stainless floor until it is in full contact with the concrete floor. Retighten the floor clamp screws.

Drill the floor with a 3/8” diameter drill to accept the concrete floor anchors.

• Mark the drill bit at 1-1/2” from the end with tape. Drill until the mark is at the top of the

stainless steel floor. Do not drill too deep.

• Clean the holes of concrete dust.

• If the oven 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.)

Install the #¼-20 flat head screws in the anchors. Use the anchor washers at the holes in the middle of the floor at the larger anchor holes. Additional screws have been provided in the event that a hole is drilled too deep

Adjust the Loading door latch to ensure a good seal around the door. Do not over tighten the door.

Adjust the floor seal at the bottom of the door to insure a good seal to the floor.

ETL File 3028821 13 Rev. #A2002

INSTALLATION CONT’D

Check the level of the rack carrier shaft. Place an accurate level on the top of the carrier and rotate the carrier to the four points of the compass. The level bubble should be in the same position relative to the carrier when rotated. If not, remove the carrier and level the shaft.

• Loosen the four corner screws on the rotator shaft level adjusting plate on the under side of the

inner ceiling. Remove the two remaining screws.

• Move the shaft manually until the shaft is level in all four directions.

• Retighten the four corner screws.

Drill two new screw holes in the adjusting plate with a #7 drill bit and tap #¼-20. Install the two remaining screws to lock the shaft level in place.

NOTICE Always ensure the grease filters supplied with the oven are

used. Replacement filters may be obtained from a Lang representative.

NOTICE It is imperative that a mechanical exhauster is installed, and the

pressure sensitive switch provided is connected at the collar of the hood. If a negative draw of 0.6” W.C. is not achieved, the burner will not come on.

NOTICE No other exhaust systems may be connected to this system. Do

not try to vent or exhaust another appliance into this hood.

Installing the Hood

• Remove the hood from the hood crate. Place the body of the hood on the floor with the open side down. Use cardboard or other protective material to avoid scratches.

• Remove all protective vinyl coatings and place the hood side support trim on each side of the hood and screw to the front of the hood with (4) #1/4-20 stainless steel truss head machine screws and spacer bushings. Install (4) #10-32 truss head stainless steel machine screws through the side support trim and into the top of the hood.

• Attach the rear trim to the opposite end of the hood side support trim using (4) ¼-20 truss head stainless steel machine screws.

• Place the combustion exhaust duct (shipped strapped to the oven skid) on the top of the heat exchanger exhaust opening.

• Lift the hood and trim assembly and place it over the top of the oven so that the side and rear trim rest on the top of the oven.

• Push the hood assembly toward the rear of the oven and align the vent exhaust opening and the exhaust duct opening with the associated ducts on the oven.

• Attach the hood side support trim and the rear trim to the top of the oven with ¼-20 stainless steel truss head machine screws.

• Attach the hood to the exhaust and vent ducts using #10 stainless steel sheet metal screws.

• Install the hood airflow sensor tube at the hood collar opening and at the airflow switch in the lifter

assembly located at the top of the oven. Double-check this connection for leaks or crimps in the tube or hose.

• Install the hood deflector using #10-32 stainless steel round head machine screws at the back of the deflector and #10-32 stainless steel truss head machine screws at three holes at the front edge of the deflector.

• Place the three hood filters and the filler channel in the hood filter holder and onto the front lip of the hood.

• Place the hood grease cup on the rear lip of the hood at the drain opening.

• Install the hood valance on the front of the hood.

ETL File 3028821 14 Rev. #A2002

INSTALLATION CONT’D

Connecting Utilities

NOTICE

• Connect gas to the oven at the gas connection pipe located at the upper left corner of the oven, above the control cabinet. Be sure that there will be ample gas supply to operate the oven with 5” to 14” W/C at all times.

• Connect the electrical service connection to the oven. Consult the data plate for specific current and voltage ratings. Wire in compliance with local requirements and the National Electric Code.

• Connect water supply to the oven at the water solenoid valve at the top left corner of the oven. Water supply must be between 20 and 80 psi at all times with a water flow of 9 gallons per minute. Provide a water shut-off valve near the oven for servicing.

• Connect the drain to the oven. Water drained from the oven will reach temperatures near boiling. The drain line must be provided with an air gap to prevent back siphoning.

Start-up:

• Remove all protective coatings from the oven surface, inside and out.

• Turn on the gas and water supplies to the oven. Check for leaks. Repair any leaks before proceeding.

• Confirm that all electrical connections are proper and all covers are in place. Confirm that the oven is

properly grounded.

• Turn on electrical power to the oven. Turn on all circuit breakers located in the electrical compartment.

• Turn the power toggle switch into the “ON” position. The oven interior light should turn on and the control display should light up.

• Close the loading door. The lifter and rack carrier should raise and begin to rotate. Open the door and allow the carrier to stop rotating. Check the position of the alignment of the carrier to the door. If the carrier needs adjustment, remove the chrome caps from the center channel on the rack carrier. Loosen the four sets-crews that lock the carrier to the shaft. Rotate the carrier until it aligns with the door and retighten the set-screws. Replace the chrome caps.

• Place an oven rack in the oven. Measure the spacing between the oven rack top channels and the rack carrier. The space between the carrier lip and the top flange of the rack channel should be approximately ¾”. Adjust the lifter micro-switch mount on the lifter body to compensate.

• Close the loading door and check the direction of rotation of the blower motor. The motor should rotate counterclockwise when viewed from the top. Reverse L1 and L2 at the power supply side of the motor circuit breaker.

• Heat the oven to 300°F. (Refer to the programming section of this manual for control operating instructions.)

• Check the oven for gas leaks, excessive smoke, vibration and general operation.

Do not allow more than 14 inches pressure to be applied to the gas valve at any time.

ETL File 3028821 15 Rev. #A2002

ETL File 3028821 16 REV.A2002

Roof top ventilator

Oven Controls

INSTALLATION CONT’D

WARNING

Power Failure:

Do not attempt to operate oven.

Turn the power to “OFF”.

Remove the product from the rack.

WARNING

Burner Failure:

1. Reset the burner:

a. Turn the power switch to “OFF”

b. Turn burner gas shut off valve’s to “OFF”

NOTICE

c. Turn burner gas shut-off valves to “ON”.

WHEN REMOVING THE RACK OR PRODUCT FROM THE RACK, WHERE HOT MITTS TO AVOID SERIOUS BURNS.

DO NOT UNLOAD THE RACK FROM THE OVEN WHILE THE CARRIER IS IN THE LIFT POSITION. LOADED RACKS CAN BE EXTREMELY HEAVY.

Wait a minimum of five minutes before proceeding to the next step.

EMERGENCY OPERATION

d. Turn Power switch to “ON”.

e. If necessary re-adjust the SET TEMP to the desired temperature.

2. Burner should now restart.

Product fire in the baking chamber

1. Turn power switch to “OFF”.

2. Wait until the fire has gone out before opening the door.

WARNING

DO NOT REMOVE A FLAMING PRODUCT FROM THE OVEN. SEVERE BURNS AND PROPERTY DAMAGE CAN RESULT.

ETL File 3028821 17 Rev. #A2002

WARNING

GENERAL OPERATION

THIS LANG OVEN PRODUCES HUMIDITY THAT CAN CAUSE THE INTERIOR FLOORING AND ADJACENT EXTERIOR FLOORING TO BECOME SLIPPERY. USE EXTREME CAUTION WHEN WALKING ON A WET OR DAMP FLOOR.

NOTICE

WARNING

NOTICE During the first few hours of operation you may notice a small

WARNING

Typical Operation

Preheat oven to desired temperature and allow oven to saturate for twenty minutes.

The steam generator absorbs heat and normalizes with the temperature in the cooking chamber.

Select a cooking program from the main menu of pre-saved programs. When selected, the temperature setting changes to the correct temperature for the product.

Load a rack full of product into the oven, engaging the rack carrier automatically.

Close the oven door. The rack is lifted off of the floor, allowing it to rotate smoothly.

Press “START”

If a steam time has been set, water will flow into the steam generator and cascades through the labyrinth of steel bars, converting the water into steam, which condenses on the food product.

When the steam cycle ends (less than 60 seconds,) the circulation blower will start and air will blow past the heat exchanger and through the rack full of product.

The rotation of the rack insures that the product is cooked evenly throughout the rack. If venting is desired, such as with breads, the vent cycle is selected when the program is started.

The vent opens for a limited time, allowing dry air to be drawn into the oven, forcing moist air out into the hood.

The computer control manages all of the timing and temperature functions and sounds an alarm at the end of the baking cycle.

Open the cooking chamber door and wait until the rack is rotated so that it is aligned with the door.

Release the latch at the top of the rack and remove the rack from the oven.

The ambient temperature outside the oven should not exceed 104° F (40° C). This includes the temperature of the air above and around the oven.

IF BURNER DOES NOT LIGHT, TURN OFF POWER SWITCH, MANUAL GAS SHUT-OFF VALVE AND BURNER GAS SHUT-OFF VALVE. WAIT A MINIMUM OF 5 MINUTES, AND THEN TRY RELIGHTING GAS BURNER

amount of smoke coming off of the oven, and a faint odor from the smoke. This is normal for a new oven and will disappear after the first few hours of use.

ETL File 3028821 18 Rev. #A2002

GENERAL OPERATION CONT’D

Loading Procedures

Set the controls.

Open the door (slowly). Wait for the rack carrier to stop and lower.

Confirm that the rack stop is in the loading (LEADING FLAP UP) position.

Align the top channels of the oven rack with the rack carrier and push the rack past the rack stop.

Close the loading door. The rack carrier will automatically lift the rack and begin to rotate.

Begin baking by pressing START. A buzzer will sound when baking is completed.

Unloading Procedure

Press the STOP button or open the loading door to turn off the buzzer.

You can view your product through the window. If it appears ready, SLOWLY open the loading door about 6 inches. Let steam and hot air escape from the opening (to be removed through the hood.)

Open the door completely. The rack carrier will come to a stop and the rack will lower.

USING OVEN MITTS, flip the rack stop to the unloading (LEADING FLAP DOWN) position.

Remove the rack from the rack carrier.

Close the loading door.

Shut Down Procedure

1. Turn the power switch to the “OFF”“ position.

2. For lengthy shutdown periods or maintenance, turn power off at the120-Volt, 208/240-volt circuit breakers.

3. Turn off the gas supply by setting the Manual Gas Supply Shutoff valves to “OFF”.

4. Switch the oven disconnect to “OFF”.

ETL File 3028821 19 Rev. #A2002

Manual Operation:

To operate the control without the use of pre-set programs, follow the instructions listed below.

1. Turn the oven on by pressing the “Power” button. The oven will automatically start preheating to the last set temperature.

2. Press either the up or down arrows until manual program is displayed.

3. Press the “Program” button; this will display the events window where time, temp, steam, vent, and pulse can be set.

4. Press the “Select” button to move between functions and the up and down arrows to change the settings.

5. Set the desired tier cooking time by using the up or down arrows and then the “Select” button, to advance to the temperature setting.

6. Enter the desired temperature using the up or down arrows and then the “Select” button, to advance to the Steam setting.

7. If you desire to steam in the first tier enter the time you would like to steam for, using the up or down arrows, for a maximum of 60 seconds. Press the “Select” button; to advance to the Vent setting.

8. If the vent is to be open for a period of time there are two methods to do this. Either press the “Vent” button during the count down cycle when the vent is to be open and then press it again to close it, or the other method requires that a separate tier be set up. To do this press the “Select” button until the time for the second tier is highlighted, using the up or down arrow keys select a time that the vent is to be open. Press the “Select” button until the Vent is highlighted. Press the up or down arrows until “o” is displayed. This will open the vent for the total time set for tier.

9. If the vent does not need to be opened press the “Select” button until BL is highlighted, then using the up or down arrows to select either “—“ (fan on), “d” (fan delay), or “p” (pulse fan). If “—“ is selected then the fan will run continuously through the tier, if “d” is selected then the fan will be off for the duration of the cook tier, and if “p” is selected then the computer will ask for a on and a off time and pulse the fan for the duration of the tier.

10. Once the program has been set load the oven and select “Run”

11. The oven will run the program and then beep continuously.

PROGRAMMING

ETL File 3028821 20 Rev. #A2002

PROGRAMMING CONT’D

Preset Programs

The oven has the capacity to program and save up to 36 programs. These programs are imputed in much the same way as the normal operation program except they will be saved and stay even after the computer has been turned off.

1. Using the up or down arrows scroll to an open recipe and press the “Program” button. This will

2. The time setting for the first tier will be highlighted. Using the up or down arrow keys select the

3. Once the time has been set press the “Select” button this will highlight the temp function. Using

4. Once the temp has been set press the “Select” button, this will highlight the steam function (the

5. If no steam is required or the steam time has been set press “Select” button, this will highlight

6. If no vent is required press the “Select” button, this will highlight the BL. Using the up or down

7. Once the tiers have been set up press the save button. This will put you back to the name and

8. Press the arrow under “Name” and use the up or down arrows to locate the correct letter and

9. Once the name is in the way it should appear, press the up or down arrow to scroll to another

Recommended Program Settings:

open the event screen, where 5 tiers are displayed.

desired time.

the up or down arrows to select the temp.

time entered here will not be in addition to the already set time). Using the up or down arrow keys select a steam time up to 30 seconds.

the vent function. If the vent is to be open a separate tier must be used, where the total tier time is the time the vent will be open. Press the up or down arrow keys until “o” is displayed, this will open the vent for the total tier time.

arrows select either “—“ (fan on), “d” (fan delay), or “p” (pulse fan). If “—“ is selected then the fan will run continuously through the tier, if “d” is selected then the fan will be off for the duration of the cook tier, and if “p” is selected then the computer will ask for a on and a off time and pulse the fan for the duration of the tier.

icon screen. Press the arrow under “Icon” and the up and down arrows to select an icon.

select to save the letter.

recipe or “Select” to run the new recipe.

Sugar Cookies: 345 Degrees for 12 minutes, no steam, no vent, no fan delay.

Step 1 2 3 4 5 Time Temperature Steam Vent BL --

1. Turn oven on and select a recipe, press the “Program” button.

2. Set Time to 12 minutes.

3. Press “Select” and set the temp to 345°F

4. Press the “Save” button and select a icon and a name.

ETL File 3028821 21 Rev. #A2002

12:00

345°F

:00

PROGRAMMING CONT’D

Muffins: 400 Degrees for 18 minutes, no steam, 3 minutes fan delay, no vent

Step 1 2 3 4 5 Time Temperature Steam Vent BL d

1. Turn oven on and select a recipe, press the “Program” button.

2. Set the time to 3 minutes.

3. Press the “Select” button and set the temp to 400°F.

4. Press the “Select” button until the BL function is highlighted. Press the up or down arrow until “d” is displayed.

5. Press the “Select” button until the tier 2-time function is highlighted. Select a time fro 15 minutes.

6. Press the “Select” button and set the temp to 400°F.

5. Press the “Save” button and select a icon and a name.

Croissants: 375 degrees for 10 to 18 minutes (depending on size), no steam, no fan delay, no vent.

Step 1 2 3 4 5 Time Temperature Steam Vent BL --

3:00 15:00

400°F 400°F

:00

12:00

375°F

:00

1. Turn the oven on and select a recipe, press the “Program” button.

2. Set Time to 12 minutes.

3. Press “Select” and set the temp to 375°F

4. Press the “Save” button and select a icon and a name.

Roast Beef: 350 degrees for 3 hours, 5 seconds of steam every 30 minutes, no vent no fan delay.

Step 1 2 3 4 5 Time Temperature Steam Vent BL -- -- -- -- --

1. Turn the oven on and select a recipe, press the “Program” button.

2. Press the “Select” button and set the time for 36:00 minutes

3. Press the “Select” button until temp is highlighted, set the temperature to 350°F.

4. Press the “Select” button and set the steam time for 5 seconds.

5. Press the “Select” button until the time is highlighted for the second tier. Set the time for 30 minutes.

6. Press the “Select” button and set the temperature to 350°F

7. Press the “Select” button and set the bake time to 30 minutes.

8. Press the “Save” button and select an icon and a name.

36:00 36:00 36:00 36:00 36:00

350°F 350°F 350°F 350°F 350°F

:05 :05 :05 :05 :05

-- -- -- -- --

ETL File 3028821 22 Rev. #A2002

PROGRAMMING CONT’D

French Bread: 425 degrees for 25 minutes, 25 seconds of steam, 1 minute of fan delay, 1 minute of vent,

additional vent at the last minute.

Step 1 2 3 4 5 Time Temperature Steam Vent BL -- d------

1. Turn the oven on and select a recipe, press the “Program” button.

2. Press the “Select” button and enter a time of: 25 seconds

3. Press the “Select” button until temp is highlighted, set the temperature to 425°F.

4. Press the “Select” button and set the steam time for: 25 seconds.

5. Press the “Select” button until the time is highlighted for the second tier. Set the time for: 45 seconds.

6. Press the “Select” button and set the temperature to 425°F

7. Press the “Select” button until the BL function is highlighted. Set the BL for “d”.

8. Press the “Select” button until the time function is highlighted for the third tier. Set the time for 1 minute.

9. Press the “Select” button and set the temperature to 425°F.

10. Press the “Select” button until the vent function is highlighted. Set the vent to “o”.

11. Press the “Select” button until the time function is highlighted for the fourth tier. Set the time for 22 minutes.

12. Press the “Select” button and set the temperature to 425°F.

13. Press the “Select” button until the time function is highlighted for the fifth tier. Set the time for 1 minute.

14. Press the “Select” button and set the temperature to 425°F.

15. Press the “Select” button until the vent function is highlighted. Set the vent to “o”

16. Press the “Save” button and select a icon and a name.

00:25 : 45 1:00 22:00 1:00

425°F 425°F 425°F 425°F 425°F

: 25 :00 :00 :00 :00

-- -- O -- O

ETL File 3028821 23 Rev. #A2002

GENERAL MAINTENANCE

NOTICE

Preventative Maint.

1. GAS OVENS ONLY: Inspect, adjust and service the oven burner according to the instructions in this manual.

2. Verify hood exhaust air-pressure switch is operating properly.

3. Inspect heat exchanger for cracks, openings or excessive corrosion.

4. Check loading door handle & striker adjustment and verify the mounting screws are tight.

5. Check interior loading door release for proper operation.

6. Clean hood filters with soap and water.

7. Check and tighten any loose screws, on both the interior and exterior of the oven.

8. Check the rack lift assembly for proper operation. Adjust limit switch as needed.

9. Check rotator chain adjustment and its alignment on the rack rotator assembly. Lubricate the drive chain if needed.

10. Grease bearings in circulation blower motor. Apply two stokes into each of the two fittings on motor.

11. Clean flour and dust that may have accumulated on top of the circulation blower motor.

12. Check steam system for proper operation and drainage.

13. Clean steam systems supply tubes nozzles and drain pan, if needed.

14. Check vent for proper operation.

15. Check loading door switch actuator for proper adjustment.

16. Check the loading door seal and door sweep condition.

17. Check control panel for proper operation.

18. Check the evenness of bake. Confirm with the oven user and verify that all pans and all locations are being browned equally.

NOTICE

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

For periodic maintenance and repairs, electrical diagrams are included in this manual and with the oven (on the back of the control door).

ETL File 3028821 24 Rev. #A2002

GENERAL MAINTENANCE CONT’D

WARNING

Motor Reset

One of the overload protectors may require resetting if the circulation blower does not start, quits or if the rack does not lift and rotate with the loading door closed. This is done automatically-nothing has to be done by the operator. After a few minutes, the oven should reset and normal operation should resume. If it has not after fifteen minutes, call for service.

NOTICE

SINCE RESETS FOR THE CIRCULATION BLOWER MOTOR AND THE LIFTER MOTOR / ROTATOR MOTOR ARE AUTOMATIC, ALL POWER TO THE OVEN MUST BE TURNED OFF BEFORE SERVICING.

Uneven Baking

If side-to-center bake is uneven, check the angles of the shutters to determine if they match the factory settings. (The angle shutters are short angles located on the pressure panel. There are 12 shutters per oven.) The angles of the shutters must be checked while oven is cool.

CAUTION

If an uneven bake problem cannot be corrected by the procedure just described, check the following:

• Voltage at blower. If voltage varies too much or if voltage is too low, a bad bake may occur.

• Gas pressure when the gas burner is on.

• The oven suction panel. Release paper sucked into the panel will reduce airflow.

• Blower rotation. If blower rotation is incorrect, it will cause an uneven bake, and severe damage to

heat exchanger.

• Your product. Contact your supplier to determine if there has been any change in raw or mixed product.

• Your product. Closely monitor the water content of the raw product.

• If the problem still cannot be corrected, call a factory authorized service company.

IF BLOWER ROTATION IS INCORRECT, IT WILL CAUSE SEVERE DAMAGE TO HEAT EXCHANGER

ETL File 3028821 25 Rev. #A2002

GENERAL MAINTENANCE CONT’D

STEP GAUGE ILLUSTRATION

ETL File 3028821 26 Rev. #A2002

SAFETY CONSIDERATIONS

Your LANG oven was manufactured to rigid standards. The oven is ETL listed as a unit, and meets safety standards.

A) The responsibility of the manufacturer

recommendations for the operation and maintenance of the subject units.

B) Trained, qualified personnel must perform all operation, maintenance and repair of the subject units.

It is the responsibility of the owner/operator

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 units must be operated within limits, which will not exceed the working limits of any component.

is to supply suitable, comprehensive instructions and

to insure this happens.

to establish,

ETL File 3028821 27 Rev. #A2002

ETL File 3028821 28 REV.A2002

ITMEM # QTY. PART # DESCRIPTION

1A 28 80400-30 BURNER ORIFICE, #52 DRILL, NG 1B 28 80400-29 BURNER ORIFICE, #61 DRILL, LP

1C 28 80400-34 BURNER ORIFICE, #578 DRILL, LP (FOR INSTALLATIONS BETWEEN 3000 & 6000 FEET)

2 28 80002-14 BURNER 3 1 80201-29 PILOT BURNER WITH SPARK ELECTRODE

PARTS LIST

ETL File 3028821 29 REV.A2002

ITMEM # QTY. PART # DESCRIPTION

1 1 80300-03 120-VOLT SPARK MODULE 2 1 150-621 FLAME SENSOR MOUNT 3 1 80506-01 PILOT FLAME SWITCH

PARTS LIST

PARTS LIST CONT’D

ITEM# QTY PART # DESCRIPTION 1 1 70404-03 GAUGE 0-100 PSI 2 1 70404-05 REGULATOR, WATER 10 PSI 3 1 70302-39 BRASS PIPE NIPPLE, ½ NPT 4 1 70101-102 BRASS TEE, ½ NPT 5 1 70302-39 BRASS PIPE NIPPLE, ½ NPT 6 1 70403-03 SOLENOID VALVE, WATER 7 1 70307-08 PIPE REDUCER, ½ X 3/8 8 1 41100-33 TEMPERATURE SENSING PROBE 9 1 70101-100 COMPRESSION FITTING FOR PROBE 10 1 30301-16 MICRO SWITCH DOOR 11 1 70701-92 BRASS FITTING-PACKING FOR STAT 12 1 70307-04 PIPE REDUCER, ½ X 1/4

ETL File 3028821 30 Rev. #A2002

PARTS LIST CONT’D

ITMEM # QTY. PART # DESCRIPTION

1 1 50800-103 MAIN HANDLE ASSEMBLY 2 1 160-106 SWEEPER 3 1 150-786 FEMALE HINGE ASSEMBLY, LOWER 4 1 150-786-1 FEMALE HINGE ASSEMBLY, UPPER 5 1 150-703 ESCAPE HANDLE ASSEMBLY 6 1 71301-19 WINDOW

SSEMBL

ETL File 3028821 31 Rev. #A2002

PARTS LIST CONT’D

Item No. Qty. Part No. Description

1 4 30500-16 TERMINAL BLOCK 2 1 31800-12 3 PHASE, 15 AMP CIRCUIT BREAKER 3 2 150-657 DINRAIL, 6” 4 1 30700-15 CONTACTOR, CIRCULATION BLOWER 5 1 30707-03 OVERLOAD, CIRCULATION BLOWER 6 1 31600-12 LIGHT BALLAST 7 5 30701-05 RELAY, 24-VOLT 8 1 31400-27 TRANSFORMER, 120/24-12 VOLT

9 1 31400-31 TRANSFORMER 10 1 30707-01 OVERLOAD, LIFT ROTATE ASSEMBLY 11 1 31200-08 GROUND LUG 12 1 60301-142 PANEL LABEL 13 1 40102-54 CIRCUIT BOARD, MICROPROCESSOR

ETL File 3028821 32 Rev. #A2002

PARTS LIST CONT’D

ITMEM # QTY. PART # DESCRIPTION

1 1 30200-57 LINEAR ACTUATOR 2 1 50803-004 LIFTER PIN 3 1 150-138 FORK CLIP TEFLON 4 1 150-137 FORK CLIP S/S 5 1 150-135 LIFTER WASHER 6 1 30301-02 MICRO-SWITCH 7 1 30308-05 AIR SWITCH 8 1 30401-26 OVER-TEMP THERMOSTAT 9 1 150-179 MICRO SWITCH BRACKET

10 1 150-158 MICRO SWITCH ACTUATOR

ETL File 3028821 33 Rev. #A2002

PARTS LIST CONT’D

ITMEM # QTY. PART # DESCRIPTION

1 2 50803-003 DRIVE BUSHING 2 1 70200-11 BUSHING 3 1 70200-12 WASHER 4 1 73000-06 DRIVE SPROCKET 5 1 73500-05 MOTOR SPROCKET 6 1 40704-06 MOTOR CAPACITOR 7 1 71500-12 ROTATION MOTOR FAN 8 1 30200-56 DRIVE MOTOR

9 1 30301-15 ROTATOR MICRO SWITCH 10 1 50803-002 DRIVE COLLAR 11 1 70200-14 WASHER FRICTION THRUST 12 1 70200-13 BUSHING, CHAIN GEAR

ETL File 3028821 34 Rev. #A2002

PARTS LIST CONT’D

ITEM# QTY. PART# DESCRIPTION

1 1 30200-59 MAIN BLOWER MOTOR 2 1 71500-14 MAIN BLOWER HEAT SINK 3 1 20601-07 RETAINING SNAP RING 4 1 150-368 BUSHING 5 1 71500-13 MAIN BLOWER WHEEL

ETL File 3028821 35 Rev. #A2002

ITEM # QTY. PART # DESCRIPTION

1 1 150-135 LIGHT HOUSING BACK 2 2 31602-07 LIGHT SOCKET 3 1 31600-13 4 FOOT FLUORESCENT BULB 4 2 20201-09 5/16” WASHER 5 1 50803-009 DAMPER ROD 6 1 150-790 DAMPER FORK 7 1 150-353 DAMPER ARM 8 1 150-349 DAMPER MOUNT 9 1 70403-04 120-VOLT DAMPER SOLENOID

10 1 80505-14 GAS VALVE, NG OR LP

PARTS LIST CONT’D

ETL File 3028821 36 Rev. #A2002

WIRING DIAGRAM

CB1 CB2

LINE

120 VAC

TB1

To Vent Motor

TB2

NGND

2 2

TR2

TR1-1

J 1

RTD

208/240 VAC

MR5

MR1

P1-5

HL1

OL1

P1-6

MR6

12 13 14

OL2

MR4

AS1

P2-4

P2-5

MR2

SV1

SA1

P2-1 P2-2

MS2

CA1

MS3

MS4

Heat

Circuit

MR3

RED

BLK

RED

4547

P2-3

MS1

L1 L2 L3

CB3

31 32 33

34 35 36

L1 - T1,T7 L2 - T2,T8 L3 - T3,T9 (T4,T5,T6)

1 - 21 120 Volt 31 - 36 208/240 Volt 41 - 61 24 Volt

Shielded 5 Volt DC Cable

J1 - J6 Computer

P1 [1 - 9] Plug, Control

P2 [1 - 9] Plug, Lift -

Inputs and Outputs

Component Mount

Rotate Assembly

IL1

20 21

BA1

ETL File 3028821 37 REV.A2002

ETL File 3028821 38 REV.A2002

2 6

115

VAC

NGL

Spark

Module

Sense

Spark

Combination

Valve

Off

Pilot

Front

Burner Assembly

CV1

Flame

Switch

GAS CIRCUIT

WARRANTY

Lang Manufacturing Limited Warranty to Commercial Purchasers*

(Domestic U.S., Hawaii, & Canadian Sales only.)

Lang Manufacturing Equipment (“Lang Equipment”) has been skillfully manufactured, carefully inspected and packaged to meet rigid standards of excellence. Lang warrants its Equipment to be free from defects in material and workmanship for (12) twelve consecutive months, with the following conditions and subject to the following limitations.

I. This parts and labor warranty is limited to Lang

Equipment sold to the original commercial purchaser/users (but not original equipment manufacturers), at its original place of installation, in the continental United States, Hawaii and Canada.

Quartz elements are warranted for ninety-days (90) from the date of installation.

II. Damage during shipment is to be reported to

the carrier, is not covered under this warranty, and is the sole responsibility of purchaser/user.

III. Lang, or an authorized service representative,

will repair or replace, at Lang’s sole election, and Lang Equipment, including but not limited to, safety valves, gas and electric components, found to be defective during the warranty period. As to warranty service in the territory described above, Lang will absorb labor and portal to portal transportation costs (time & mileage) for the first (12) twelve months from the date of installation or eighteen (18) months from date of shipment from Lang Manufacturing, which ever comes first.

IV. This warranty does not cover routine general

maintenance, periodic adjustments, as specified in operating instructions or manuals, and consumable parts such as quartz elements, or labor costs incurred for removal of adjacent equipment or objects to gain access to Lang Equipment. This warranty does not cover defects caused by improper installation, abuse, careless operation, or improper maintenance of equipment.

V. THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU

OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, EACH OF WHICH IS HEREBY EXPRESSLY DISCLAIMED. THE REMEDIES DESCRIBED ABOVE ARE EXCLUSIVE AND IN NO EVENT SHALL LANG BE LIABLE FOR SPECIAL, CONSEQUENTIAL OR INCIDENTAL DAMAGES FOR THE BREACH OR DELAY IN PERFORMANCE OF THIS WARRANTY.

VI. Lang Equipment is for commercial use only. If sold

as a component of another (OEM) manufacturer’s equipment, or if used as a consumer product, such Equipment is sold AS IS and without any warranty.

ETL File 3028821 39 Rev. #A2002

Lang LRO-2G Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

EQUIPMENT DESCRIPTION

INSTALLATION INSTRUCTIONS

EMERGENCY OPERATION

GENERAL OPERATION

PROGRAMMING

GENERAL MAINTENANCE

PARTS LIST

WIRING DIAGRAM

WARRANTY