Lang EHS-PT Operators Manual

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Page 1

Installation, Operation, & Maintenance

Model: EHS-PT,

Electric Half Size Convection Oven

Page 2

THIS MANUAL 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.

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 #:

Location:

Date Purchased:

Purchase Order #:

Date Installed:

For Service, Call:

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CHAPTER PAGE

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

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

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

UNPACKING........................................................................................................ 7

INSTALLATION.................................................................................................. 8

INITIAL START-UP ............................................................................................ 12

OPERATION ........................................................................................................ 13

MAINTENANCE & CLEANING PROCEDURES..............................................16

TROUBLE SHOOTING....................................................................................... 17

PARTS LIST......................................................................................................... 19

WIRING DIAGRAM............................................................................................ 20

UL File# E8138 Rev. C2006

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IMPORTANT READ FIRST IMPORTANT

EACH UNIT WEIGHS 225 LBS (102.23 KILOGRAMS). FOR SAFE HANDLING, INSTALLER SHOULD OBTAIN HELP AS NEEDED, OR

CAUTION

EMPLOY APPROPRIATE MATERIALS HANDLING EQUIPMENT (SUCH AS A FORKLIFT, DOLLY, OR PALLET JACK) TO REMOVE THE UNIT FROM THE SKID AND MOVE IT TO THE PLACE OF INSTALLATION.

ANY STAND, COUNTER OR OTHER DEVICE ON WHICH OVEN WILL BE LOCATED MUST BE DESIGNED TO SUPPORT THE WEIGHT OF THE OVEN.

CAUTION

DANGER

WARNING

NOTICE

CAUTION

WARNING

CAUTION

NOTICE

SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT.

THIS APPLIANCE MUST BE GROUNDED AT THE TERMINAL PROVIDED. FAILURE TO GROUND THE APPLIANCE COULD RESULT IN ELECTROCUTION AND DEATH.

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 IN ACCORDANCE WITH ALL APPLICABLE CODES.

The data plate is located on the back of the oven above the power outlet. The oven voltage, wattage, serial number, wire size, and clearance specifications are on the data plate. This information should be carefully read and understood before proceeding with the installation.

The installation of any components such as a vent hood, grease extractors, fire extinguisher systems, must conform to their applicable National, State and locally recognized installation standards.

During the first few hours of operation you may notice a small amount of smoke coming off 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.

ALWAYS KEEP THE AREA NEAR THE APPLIANCE FREE FROM COMBUSTIBLE MATERIALS AND DO NOT OBSTRUCT FLOW OF COMBUSTION OR VENTILATION AIR.

KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND DRY. IF SPILLS OCCUR, CLEAN IMMEDIATELY, TO AVOID THE DANGER OF SLIPS OR FALLS.

KEEP WATER AND SOLUTIONS OUT OF CONTROLS. NEVER SPRAY OR HOSE CONTROL CONSOLE, ELECTRICAL CONNECTIONS, ETC.

MOST CLEANERS ARE HARMFUL TO THE SKIN, EYES, MUCOUS MEMBRANES AND CLOTHING. PRECAUTIONS SHOULD BE TAKEN TO WEAR RUBBER GLOVES, GOGGLES OR FACE SHIELD AND PROTECTIVE CLOTHING. CAREFULLY READ THE WARNING AND FOLLOW THE DIRECTIONS ON THE LABEL OF THE CLEANER TO BE USED.

Never leave a chlorine sanitizer in contact with stainless steel surfaces longer than 10 minutes. Longer contact can cause corrosion.

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IMPORTANT READ FIRST IMPORTANT

Service on this, or any other, LANG appliance must be performed by

NOTICE

WARNING

CAUTION

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.

BOTH HIGH AND LOW VOLTAGES ARE PRESENT INSIDE THIS APPLIANCE WHEN THE UNIT IS PLUGGED/WIRED INTO A LIVE RECEPTACLE. BEFORE REPLACING ANY PARTS, DISCONNECT THE UNIT FROM THE ELECTRIC POWER SUPPLY.

USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY LANG OR THEIR AUTHORIZED DISTRIBUTORS CAN CAUSE BODILY INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT AND WILL VOID ALL WARRANTIES.

UL File# E8138 Rev. C2006

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EQUIPMENT DESCRIPTION

Lang Model: Lang Model: EHS-PT

Exterior Construction

The oven exterior dimensions are 30” (76.2 cm) Wide, 25.25” (74.3 cm) High, 26.5” (67.31 cm) Deep. The Top, Front, Back, and Sides are constructed of stainless steel with an aluminized bottom.

The oven door comes standard with a window. The door handle is constructed of Polycarbinate. The oven cavity is insulated with high temperature insulation for efficiency and

reduced heat loss.

Interior Construction

The oven cavity dimensions are 15” (38.1 cm) Wide, 20” (50.84 cm) High, 21” (53.38 cm) Deep.

The oven is designed for five shelves and comes with five Chrome Plated Racks. The interior of the oven is constructed of stainless steel.

Operation

The EHS-PT oven is a forced air convection oven with a vented oven cavity. The air is driven by a 1/3 HP fan motor.

Controls

Icon driven (touch) panel allows for easy operation. Complete computerized controls. Pre-Programmable product selections. Independent shelf timers for each shelf. Load control through use of Cooking C ur ves. Shelf compensation for uniform baking. Solid state temperature sensing and controls. Dual speed fan. Manual override controls.

Technical

Oven operates as shipped on either 208 or 240, Single or Three Phase and 480-Volt Three Phase.

The oven can be shipped with a Power Cord and Plug attached, but must be specified upon ordering (part number is listed in the Parts portion of this manual).

Floor space required is 42” (106.68cm) Wide, 32.5” (82.55cm) Deep. The oven weighs 225 lb. (102.5 Kilograms). The ovens are stackable and can include stacking kit if requested.

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UNPACKING

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 m a te ri al shoul d be kept for inspection.

Do not return damaged merchandise to Lang Manufacturing Company. File your claim with the carrier.

Location

Prior to un-crating, move the oven as near to its intended location as practical. The crating will help protect the unit from the physical damage normally associated with moving it through hallways and doorways.

Un-crating

The oven will arrive completely assembled inside a wood frame and strapped to a skid. Cut the straps and remove the wood frame.

EACH UNIT WEIGHS 225 LBS (102.23 KILOGRAMS). FOR SAFE HANDLING, INSTALLER SHOULD OBTAIN HELP AS NEEDED, OR

CAUTION

EMPLOY APPROPRIATE MATERIALS HANDLING EQUIPMENT (SUCH AS A FORKLIFT, DOLLY, OR PALLET JACK) TO REMOVE THE UNIT FROM THE SKID AND MOVE IT TO THE PLACE OF INSTALLATION.

ANY STAND, COUNTER OR OTHER DEVICE ON WHICH OVEN WILL BE

CAUTION

Remove Oven from skid and place in intended location.

LOCATED MUST BE DESIGNED TO SUPPORT THE WEIGHT OF THE OVEN.

SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT.

UL File# E8138 Rev. C2006

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DANGER

WARNING

NOTICE

INSTALLATION

THIS APPLIANCE MUST BE GROUNDED AT THE TERMINAL PROVIDED. FAILURE TO GROUND THE APPLIANCE COULD RESULT IN ELECTROCUTION AND DEATH.

The installation of any components such as a vent hood, grease extractors, fire extinguisher systems, must conform to their applicable National, State and locally recognized installation standards.

Leg Installation

Legs are available for single, double, and counter top installations. Single deck installations require a 28-inch leg, double deck installations require a 16-inch leg, and counter top installations require a 4-inch leg.

To install the 28-inch legs, place some cardboard on the floor and gently tip the oven onto its back. Fasten two legs to the oven's front. Lift the oven onto its front legs and block the back up using one of the 28-inch legs set upside down in the center rear of the oven body. Install the last 28-inch leg onto the oven body on the control side rear. Gently lift the oven rear, remove the leg set to support the oven center and install it on the last rear corner.

To install the 16-inch legs follow the same instructions as the 28-inch legs. To install the 4-inch legs, place some cardboard on the floor and gently tip the oven

onto its back. Fasten the four 4-inch legs into the threaded holes provided on the bottom of the convection oven. Gently lift the oven onto the legs.

Stacking the Ovens

Stacking kits must be requested upon purchase. Remove all the plug buttons from the top of the lower oven. Remove the stacking kit from the oven compartment of one oven and install the 1

1/4-inch plastic bushing into the top of the lower oven. Tip the top oven backwards and install two pins into the front leg holes of the top

oven. Lift the top oven and gently set on top of the lower oven so that the studs nest into

the holes of the lower oven.

Steam Installations

For steam installations review Steam Kit installation manual shipped with the oven.

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INSTALLATION CONT’D

Reversing the door

1. Disconnect oven from power.

2. Remove the top and bottom door hinge covers (4) by removing the two 10-32 Phillip

head screws (8).

3. Remove the top door hinge bracket (1) from the oven by removing the two ¼-20

Phillip head screws (7). The hinge should now slide off of the door pin (this will now be your right hand lower hinge)

4. Lift the door off of the bottom pin and set aside.

5. Remove the bottom door hinge bracket (2) by removing the two ¼-20 Phillip head

screws (7) (this will now be your upper right hand hinge).

6. Remove the lower hinge mounting plate (9) by pulling it from behind the leg pad

adapter on the bottom of the oven.

7. Remove the two Phillips head screws in the bottom right corner of the oven, where the

new hinge will be placed.

8. Slide the hinge mounting plate (9) into place and mount the hinge bracket (this should

be your old upper hinge) using two ¼-20 (7) Phillips head screws.

9. Remove the two Phillips head screws in the upper right corner of the oven where the

new hinge will be placed.

10. Rotate the door 180° and slide the door pin into the bottom hinge bracket.

11. Slide the upper door hinge (1) onto the upper door pin and then screw into place using

two ¼-20 Phillip head screws.

12. Place the top and bottom door hinge covers (4) back on the oven using two 10-32

Phillip head screws (8).

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Vent Cap Installation

INSTALLATION CONT’D

NOT REQUIRED IF OVEN HAS SOLID TOP!

Screw (2x)

Vent Flange

Oven Top Screw (2x)

Step one: Attach vent flange to oven top with screws

Vent Cover Oven Top

Step two: Attach vent cover to vent flange with screws

Step three: Assembly is complete

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INSTALLATION CONT’D

Ventilation and Clearances

Standard minimum clearance from combustible construction is as follows.

4” from side 4” from back 6” from floor

These ovens may be set directly, without legs, on a curbed base or non-combustible floor.

If the oven is set without legs on a non-combustible floor or a curbed base, maintain a 4-inch back clearance.

If the oven is set directly against a non-combustible back wall, maintain a 6-inch clearance to the floor.

Do not install the oven closer than 4 inches from another o v e n on the rig ht han d si de (control panel side).

Do not install the oven closer than 12 inches from an uncontrolled heat source (char broiler etc.) on the right side.

ALWAYS KEEP THE AREA NEAR THE APPLIANCE FREE FROM

CAUTION

Electrical Connection

The electrical connection must be made in accordance with local codes or in the absence of local codes with NFPA No. 70, latest edition (in Canada use: CSA STD. C22.1).

The electrical service entrance is provided by a 1 1/4-inch knockout at the oven back directly behind the control compartment. A grounding lug is provided at the rear service entrance.

The EHS-PT can be purchased with a Cord & Plug kit (Part number is listed in the parts portion of this manual.). This kit includes a 48” cord with a NEMA L15-30P plug.

COMBUSTIBLE MATERIALS AND DO NOT OBSTRUCT FLOW OF COMBUSTION OR VENTILATION AIR.

Oven Voltage

The Lang Model EHS oven can be operated on 208-Volt or 240-Volt (single or three phase), or 480-volt (three phase only) source. The Amp dr aw, KW rating, and phasing can be found in the wiring diagram section of this manual.

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INITIAL START UP

Pre-Power On

After the oven is installed and connected to power, prior to turning on, verify the following:

• The door opens and closes freely.

• All racks are in the oven correctly.

• All packing materials have been removed from the inside of the oven.

Power On

Once oven has been turned on verify that the blower wheel is spinning freely in a clockwise position and that the elements are heating properly.

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

NOTICE

smoke coming off 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.

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Control Panel

Function keys. Keys are active when a program option is displayed on display.

OPERATION

Alpha-Numeric Display.

Cancel button. When scrolling through menu’s this will allow you to back up to the previous menu. In program mode this will allow you to advance to the next ste

Arrow up button. Allows you to scroll up.

Cancel

P L A T I M U M

Up Down Light

Arrow down button. Allows you to scroll down.

Power switch.

On/Off

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OPERATION CONT’D

Typical Operation Sequence

ACTION RESULT Press the on switch. Control panel comes on, display says “LANG,

Run Oven, Time Date Program. Select “Run Oven”. Display will show a list of product to choose. Select Product button next to Icon desired. Display says “Preheating to XXXF”. Beeper sounds briefly. Display says “Ready”. Select Product to start. Display shows possible product selection for

that temperature. Select Product to start. Display says “Select shelf”. Press Product button next to desired shelf. Display will show icon chosen and begin to

count down. Beeper sounds continuously. Display shows “ DONE” ,press button and

remove product from that shelf. Oven is ready for another product.

Hints & Suggestions

Convection ovens constantly circulate air over and around the product. This strips away the thin layer of moisture and cool air from around the product allowing heat to penetrate more quickly.

Cooking times can be shortened and cooking temperatures can be reduced. To convert standard deck oven recipes, reduce the temperature 50 degrees and the time by 25%.

Make minor adjustments as necessary. The lower the oven temperature the more even the bake. Always weigh your product. This will give you a more consistent size, color and quality. Check the product near the end of the initial cooking cycle. Do not open the oven doors during baking as this will change the baking characteristics of the oven

and make it difficult to determine a final program. If the product is overdone on the outside and underdone on the inside, reduce the baking temperature. If the product is pulling away from the edge of the pan, the temperature is too high or the cooking

time too long. The convection is a mechanical piece of equipment. The same control settings will always give the

same results. If the results vary, problems may be because of product preparation.

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OPERATION CONT’D

When loading and unloading the oven, stage products and racks so the oven doors are opened for the least amount of time.

Be sure that racks are level within the oven. Bent or warped pans can greatly affect the evenness of the cook or bake. If using baker’s parchment, be sure the parchment does not blow over the product.

The will create an uneven bake. Load each shelf evenly. Spaces should be maintained equally between the pan and

oven walls, front and back. Do not overload pan’s this will create a uneven bake. For best baking results, load the oven from the center out during random loading.

ALWAYS KEEP THE AREA NEAR THE APPLIANCE FREE FROM

CAUTION

COMBUSTIBLE MATERIALS AND DO NOT OBSTRUCT FLOW OF COMBUSTION OR VENTILATION AIR.

KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND DRY. IF SPILLS OCCUR, CLEAN IMMEDIATELY, TO AVOID THE DANGER OF SLIPS OR FALLS.

UL File# E8138 Rev. C2006

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WARNING

CAUTION

NOTICE

MAINTENANCE & CLEANING

KEEP WATER AND SOLUTIONS OUT OF CONTROLS. NEVER SPRAY OR HOSE CONTROL CONSOLE, ELECTRICAL CONNECTIONS, ETC.

Never leave a chlorine sanitizer in contact with stainless steel surfaces longer than 10 minutes. Longer contact can cause corrosion.

Cleaning

• Always start with a cold oven.

• The stainless exterior can easily be cleaned using Lang Mfg. Prime Shine (72804-

41) oven cleaner.

• Always follow the cleaner manufacturer's instructions when using any cleaner.

• Care should be taken to prevent caustic cleaning compounds from coming in

contact with the blower wheel.

• The oven racks, rack slides, and interior may be cleaned using Lang Mfg. Foam

Deluxe (72804-36) oven cleaner.

• Discoloration or heat tint may be removed using Lang Mfg. Carbon Release

(72804-32) oven cleaner.

• Always apply these cleaners when the oven is cold and rub in the direction of the

metal's grain.

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TROUBLESHOOTING

Symptoms

What follows is a chart of Symptoms and Possible Causes to aid in diagnosing faults with the oven. Refer to the Symptoms column to locate the type of failure then to the Possible Cause for the items to be checked. To test for a possible causes refer to the TEST section and locate the Possible Cause then refer to test to identify test procedures.

SYMPTOM POSSIBLE CAUSE

Display will not come on

Oven will not heat

Oven motor will not run

Product burning

Product under done

• No power to cord outlet

• Oven unplugged from outl et

• Failed power cord or plug

• Contrast needs to be adjusted

• Failed display board

• Power Switch is not “ON”

• Product not selected

• Failed Transformer

• Failed Probe

• Failed Circuit board

• Failed Contactor

• Failed Over-temperature Thermostat

• Failed Element

• Power Switch is not “ON”

• Product not selected

• Failed Transformer

• Failed Contactor

• Failed Motor

• Failed Circuit board

• Product is cooked too long

• Failed Probe

• Failed Circuit board

• Product is not cooking long enough

• Failed Probe

• Failed Circuit board

UL File# E8138 Rev. C2006

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NOTICE

WARNING

TROUBLESHOOTING CONT’D

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.

BOTH HIGH AND LOW VOLTAGES ARE PRESENT INSIDE THIS APPLIANCE WHEN THE UNIT IS PLUGGED/WIRED INTO A LIVE RECEPTACLE. BEFORE REPLACING ANY PARTS, DISCONNECT THE UNIT FROM THE ELECTRIC POWER SUPPLY.

TESTS

If an item on the list is followed by an asterisk (*), the work should be done by a factory authorized service representative.

Possible Cause TEST

Product is cooked too long Failed Probe Failed Circuit board

Failed Transformer

Failed Contactor

Failed Motor Failed or disconnected safety

thermostat Failed Element

• No test available, operational condition

• Check probe for proper resistance*

• Confirm that Circuit board is getting correct

voltage and putting out correct voltage*

• Check both Primary and Secondary coils for

correct voltage*

• Remove the wires from the contactor coil and

check for continuity across the contactor coil connection*

• Ensure the contactor moveable points move

freely up and down*

• Confirm that motor is getting correct voltage*

• Check across the thermostat connectors for

continuity*

• Confirm that Elements are getting correct

voltage and have continuity*

USE OF ANY REPLACEMENT PARTS OTHER THAN THOSE SUPPLIED BY

CAUTION

UL File# E8138 Rev. C2006

LANG OR THEIR AUTHORIZED DISTRIBUTORS CAN CAUSE BODILY INJURY TO THE OPERATOR AND DAMAGE TO THE EQUIPMENT AND WILL VOID ALL WARRANTIES.

Page 19

PARTS LIST

DESCRIPTION PART NO.

Element EHS Oven 208 Volt 7500 Watts 11090-20 Element EHS Oven 240 Volt 7500 Watts 11090-21 Element EHS Oven 480 Volt 7500 Watts 11090-22 Stacking Pins 20108-01 Motor 1/3 HP 480 Volt 2 Speed 30200-16 Motor 1/3 HP 208/240 Volt 2 Speed 30200-17 Cooling Fan 30200-46 Switch Toggle On-Off 30303-06 Thermostat Safety 490°F Open Thermostat 450°F Oven Terminal Block 3 Pole 30501-02 Terminal Block 24 Position Quick Disconnect 30503-01 Relay 240 VAC 30600-02 Contactor 3 Pole 24 VAC (Heat) 30700-06 Contactor 2 Pole 24 VAC (Motor) 30701-05 Cable Ribbon Assembly 31110-13 Transformer 480/240 VAC 31400-04 Transformer 120-208-240/24 VAC 31400-07 Transformer 240/12 VAC 31400-26 Circuit Board Display 40102-25 Circuit Board Microprocessor 40102-26 Probe Temperature Sensor 41100-12 Oven Rack 50200-34 Oven Rack Slide 50200-83 Door Handle 11 1/2” Long Black “T” Style 50800-12 Complete Door Assembly 51100-53 Baffle 60101-621 Door Magnet 60102-147 Top Panel 60102-136 Rear Panel 60102-1361 Right Hand Panel 60102-1364 Switch, Plunger 60102-40 Switch, Plunger Oven Door (Between V-27971 & W-48418 Except Reversible doors) Switch Micro Convection Oven Door (Before V-27971 & After W48418 and all reversible doors) Door Seal 60102-97 Panel Label, Purple Plus 60101-7662 Hinge Bracket Assembly, Upper and Lower 50313-030 Knob Thermostat 450°F Oven Window Assembly, Oven Door 71301-04 Blower Wheel 71500-06 Blower Wheel (Steam Units) 51100-60 Wiring Harness, Element EH-550 Wiring Harness, Power Switch EH-554 Wiring Harness, High Voltage Control EH-551 Wiring Harness, Low Voltage Control EH-553

60102-102 30402-27

30301-11

51100-18

70701-28

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WIRING DIAGRAM 208/240

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WIRING DIAGRAM 480

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WIRING DIAGRAM 220/380 & 240/415

UL File# E8138 Rev. C2006