Lang ECOH-C3VCN Owner's manual

ELECTRIC HALF SIZE
COMPUTERIZED
CONVECTION OVEN
ECOH-C2/3VCN
ECOH-C2/4VCN
ECOH-C208CNF
ECOH-C208VCN
ECOH-C240VCN
ECOH-2/4CECN
ECOH-C480VCN
Installation and
Operation
Instructions
2M-W493 Rev. G 7/13/15
ECOH-C
IL1429

2
These symbols are intended to alert the user to the presence of
important operating and maintenance instructions in the manual
accompanying the appliance.
FOR YOUR SAFTEY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN
THE VICINTIY OF THIS OR ANY OTHER APPLIANCE.
POST IN 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,
OPERATION & MAINTENANCE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING OR
SERVICING THIS EQUIPMENT.
WARNING
RISK OF FIRE OR ELECTRIC SHOCK
DO NOT OPEN
WARNING, TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE
CONTROL PANEL. NO USER-SERVICABLE PARTS INSIDE.
REPAIRS SHOULD BE DONE BY AUTHORIZED SERVICE PERSONNEL ONLY.
NOTICE
Using any part other than genuine Lang factory supplied parts relieves the manufacturer of all
liability.
Lang reserves the right to change specications and product design without notice. Such
revisions do not entitle the buyer to corresponding changes, improvements, additions or
replacements for previously purchased equipment.
Due to periodic changes in designs, methods, procedures, policies and regulations,
the specications contained in this sheet are subject to change without notice. While
Lang exercises good faith efforts to provide information that is accurate, we are not
responsible for errors or omissions in information provided or conclusions reached as a
result of using the specications. By using the information provided, the user assumes all risks
in connection with such use.
MAINTENANCE AND REPAIRS
Contact your local dealer for service or required maintenance. Please record the model number, serial
number, voltage and purchase & Installation Information in the area below and have it ready when you
call to ensure a faster service.
SAFETY SYMBOL
Model No.:
Serial No.:
Voltage:
1-Phase or 3 Phase:
Purchased From:
Location:
Purchase Date:
Installed Date:

3
TABLE OF CONTENTS
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Equipment Description . . . . . . . . . . . . . . . . . . . . . . . . 5
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation
Leg Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Stacking the Oven. . . . . . . . . . . . . . . . . . . . . . . . . 7
Vent Cap Installation . . . . . . . . . . . . . . . . . . . . . . . 8
Ventilation & Clearence . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . 9
Oven Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Reversing the door . . . . . . . . . . . . . . . . . . . . . . . . . .10
Initial Start-Up
Pre-Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
General Operation & Programming
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Status Display
. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Control Panel Buttons
. . . . . . . . . . . . . . . . . . . . . . . 13
Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Pace Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Program Enable Buttons . . . . . . . . . . . . . . . . . . . . .14
Shelf Position Buttons . . . . . . . . . . . . . . . . . . . . . . . 14
Cleaning
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting
Symptoms & Possible Causes . . . . . . . . . . . . . . . . . .15
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . .16 - 18
Exploded View & Parts List
. . . . . . . . . . . . . . . . . . . . . 20 - 26
PROBLEMS, QUESTIONS or CONCERNS
Before you proceed consult you authorized Lang service agent directory
or
Call the Lang Technical Service & Parts Department at 314-678-6315
NOTICE ServiceonthisoranyotherLangappliancemustbeperformedbyqualied
personnel only. Consult your Lang Authorized Service Agent Directory. You
can call our toll free number 314-678-6315 or visit our website
WWW.LANGWORLD.COM for the service agent nearest you.

4
SPECIFICATIONS
Model Height x Width x Depth Clearance from Weight
(without optional stand) combustible surface Installed Shipping Freight Class
ECOH-C 25.3” x 30.2” x 25.3” Side:6”, Back: 6”, Floor: 6” 185 lbs. 225lbs 85
642mm x 766mm x 643mm (84 kg) (102 kg)
30.2”
766mm
25.3”
643mm
28.0”
711mm
56.0”
1422mm
25.3”
642mm
25.3”
642mm
20.8”
529mm
28.0”
711mm
25.3”
642mm
3.0”
76mm
Electrical
Connection
28.0”
711mm
30.2”
766mm
STAND OPTIONAL
Front Side View Top ViewRight Side View
IL1432
UTILITY REQUIREMENTS
Model Number Volts Hz Motor Amps Phase KW
ECOH-2/4CECN 240/415 50/60 33 1/3PH-4 Wire 7.8
ECOH-C2/3VCN 220/380 50/60 3.3 1/3PH-4 Wire 6.7
ECOH-C2/4VCN 240/415 50/60 1.2 1/3 7.8
ECOH-C208CNF 208 60 3.3 1/3 5.6
ECOH-C208VCN 208 60 3.3 1/3 7.8
ECOH-C240VCN 240 60 2.6 1/3 7.8
Model Number Amps 1PH Wire 1PH L1 L2 L3 Wire 3PH
ECOH-2/4CECN 11.8 10.4 10.4 12
ECOH-C2/3VCN 30 10 11 10 10 12
ECOH-C2/4VCN 32.5 8 10.4 10.4 11.6 12
ECOH-C208CNF 27 10 12 23 15 10
ECOH-C208VCN 38 8 23 21 23 10
ECOH-C240VCN 33 8 20 18 20 12

5
EQUIPMENT DESCRIPTION
Exterior Construction
The Top, Front, Back, and Sides are constructed of stainless steel with an aluminized bottom.
The oven exterior dimensions are:
30” (76.2 cm) Wide,
25.25” (74.3 cm) High,
26.5” (67.31 cm) Deep.
The oven door comes
standard with a high temperature
insulated window equipped with a
polycarbonate handle.
The oven cavity is insulated with high
temperature insulation for efciency
and reduced heat loss.
Interior Construction
The oven is designed for ve shelves
and comes with ve Chrome Plated
Racks.
The interior cooking chamber is
constructed of stainless steel with
dimensions of:
15” (38.1 cm) Wide,
20” (50.84 cm) High,
21” (53.38 cm) Deep.
Operation
The ECOH oven is a forced air convection oven with a vented oven cavity.
The air is driven by a 1/3 HP fan motor.
Controls
Pre-Programmable Product Selections
Independent Shelf Timers for each Shelf.
Shelf Compensation Timing for uniform baking.
Technical
Oven operates as shipped on either 208 or 240-volt (singe or three phase), or 480-volt (three phase).
The oven can be shipped with a Power Cord and Plug attached, but must be specied 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 approximately 225 lb. (102.5 Kilograms).
The ovens are stackable, stacking kit available upon request.
The data plate is on the right side of the oven below the removable panel.
The oven voltage, wattage, serial number, wire size, and clearance
specicationsareonthedataplate.Thisinformationshouldbecarefullyread
and understood before proceeding with the installation.
Depth
Width
Height
Motor Cover
Back-Up Controls
Controls
Door Handle
IL1418
NOTICE

6
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 it 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 should be kept for inspection. Do not return damaged merchandise
to Star 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.
The oven can now be removed from the skid.
THE UNIT IS EXTREMELY HEAVY. FOR SAFE HANDLING, INSTALLER SHOULD
OBTAIN HELP AS NEEDED, OR 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.
SHIPPING STRAPS ARE UNDER TENSION AND CAN SNAP BACK WHEN CUT.
CAUTION

7
INSTALLATION
Leg Installation
4” legs are available for single
countertop installations. Single
and double deck installations
require 16” or 28” stand installation,
casters may also be used in certain
situations.
To install the 4” legs, place some
cardboard on the oor and gently tip
the unit onto its back. Fasten the
four, 4” legs into the threaded holes
located on the bottom of the unit.
Gently lift the oven into its operating
position.
16” & 28” stand installation, after
following the assembly
instructions that were provided with
the stand, gently lower unit on to
some cardboard as shown here.
Align the stand with the bottom of
the unit and secure with the
hardware provided. With
assistance, of carefully raise the
unit to its vertical position.
Stacking the Ovens
Two alignment pins (pn:2C-20108-11) are
needed if you intend on stacking two ECOH-C
on each other as shown. These pins must be
requested at the time of purchase, or call your
Lang authorized service agent, or Lang parts
department at 314-678-6315.
Having completed the previous step remove
any and all button plugs from the lower unit, so
the upper unit will lay properly.
Lay the upper unit on its back and screw the
alignment pins into the two rear holes.
With assistance lift the upper unit onto the lower
unit, being certain that the alignment pins go
into the alignment holes, as shown here.
NOTE: Each unit must have separate
electrical connections
IL1430
16” or 28”
Stand
4” Leg
Cardboard
Leg
Mounting Hole
IL1431
Alignment Pins
pn: 2C-20108-11
Alignment Hole

8
Screw (2x)
Screw (2x)
Oven Top
Vent Flange
Vent Cover
IL1423
INSTALLATION continued
Vent Cap
Certian units come equipped with a vent cap assembly, this gets installed on top of the unit as shown
here. If your unit does not come equipped with this feature call the Lang parts department
at 1-800-438-5264 to inquire.
This vent allows:
heat to escape from the electronic controls and motor assemlby more freely, allowing
cooler air to enter through the side.
reduces the possiblitiy of blocking the vent or having objects or moisture falling into the
controls & motor compartment possibly damaging sensitive electronic components.
Install Vent Cap
1. Unit should be turned off.
2. Align vent ange with mounting holes on top of the unit as shown here.
3. Secure in place with hardware provided.
4. Align the mounting holes on the vent cover, with the holes on the vent ange, and secure with
hardware provided.
Vent Cap Assembly Installation, standard with certain models

9
INSTALLATION continued
Ventilation and Clearances
Standard minimum clearance from combustible construction is as follows.
4” from side
4” from back
6” from oor
• These ovens may be set directly, without legs, on a curbed base or non-combustible oor.
• If the oven is set without legs on a non-combustible oor 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
oor.
• Do not install the oven closer than 12 inches from an uncontrolled heat source (char broiler etc.) on
the right side.
• Keep the area free & clear of combustible material, and do not obstruct the ow of combustion or
ventilation air.
• The installation of any components such as a vent hood, grease extractors, and/or re extinguisher
systems, must conform to the applicable nationally recognized installation standards.
NOTICE The installation of any components such as a vent hood, grease
extractors,reextinguishersystems,mustconformtotheir
applicable National, State and locally recognized installation
standards.
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 ECOH-C-VCN can be purchased with a Cord & Plug kit (Part number 9Q-ECOH-CK). This kit
includes a 48” cord with a NEMA L15-30P plug. In stacked situations each units needs to have separate
cord & plug assemblies.
Oven Voltage
The Lang Model ECOH ovens can be operated on 208, 240-volt (single or three phase), or 480-volt
(three phase only) source. The Amp draw, KW rating, and phasing can be found in the specication
section of this manual found on page 4.
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.
WARNING
WARNING

10
8
4
1
5
6
8
8
10
11
1
12
5
4
7
7
6
8
8
8
8
9
INSERT BEARINGS (ITEMS "5") INTO THE HINGES
(ITEMS "1" & "2") AS SHOWN THEN REAM WITH A
.508 REAMER.
ECOH HINGE RELPACEMENT KIT
pn: Q9-50313-030
ITEM NO. QTY. PART NO. DESCRIPTION
50313-031
HINGE PIN WELDMENT
EH-267 EH HINGE COVER
70201-19
70201-01
20109-43
20109-15
eh-198-1
BOTTOM HINGE PLATE ASSY
CR30-148 UPPER HINGE COVER FOR EH
EH-265-1 EH HINGE - TOP - FOR SVC KIT
3
4
5
6
7
8
9
10
11
12
2
2
2
2
2
8
1
1
1
1 EH-266-1
EH HINGE - BOTTOM - FOR SVC KIT
IL1426
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 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).

11
INITIAL START UP
Pre-Power On
After th 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 the oven has been turned
“ON” verify that the blower
wheel is moving freely in a
clockwise position and that the
elements are heating properly.
Switch the back-up controls on
and make certain it can run the
unit.
Conrm that the thermostat
knob in the back-up controls is
move freely.
Switch the back-up controls
OFF to take it out of back-up
mode.
Duringtherstfewhoursofoperationyoumaynoticeasmallamountofsmoke
coming from the oven, and a faint odor from the smoke.
Thisisnormalforanewunitandwilldisappearaftertherstfewhoursofuse.
IL1433
Back-Up Controls
Blower Wheel
NOTICE

12
General Operation & Programming
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.
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.
Do not open the oven door during baking, as this will change the baking characteristics of the oven and make it
difcult to determine a nal 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.
A convection oven 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 changes in the product preparation.
Control Panel
The Control panel consists of the following items. Detailed operational descriptions are given later this section.
Power Switch: Turns the oven on and off
Status Display: Displays the oven status
(preheat, ready, done) and is the count down
timer.
Shelf Timers: Numbered 1 to 6, these
buttons represent different shelf positions.
Button # Shelf Position
1 Top Left
2 Top Right
3 Middle Left
4 Middle Right
5 Bottom Left
6 Bottom Right
Pace Timers: Labeled C, P, and E these
buttons are adjustable from one to thirty
minutes.
Minute Timers: There are two “Minute”
timers. “1” is programmed for one minute,
“2” is programmed for two minutes.
Temp Button: When pressed this button will
display the temperature of the oven.
Program Enable Buttons: These are
“hidden” buttons that allow the times of the
shelf position buttons to be set.
Power Switch
Shelf Timers
Status Display
Pace
Timers
Minute
Timers
Temperature
Button
Program
Enable Button
IL1428

13
General Operation & Programming cont.
Status Display
The Status Display informs the operator of the oven’s status.
Preht Stands for PREHEAT. The oven has been turned on and is adjusting to the preprogrammed temperature (310°F, 154°C).
Ready The oven has reached the preset temperature and is waiting for product to be loaded into the oven.
Cool The oven’s internal temperature is below what is programmed.
Hot The oven’s internal temperature is above what is programmed.
Done The time has expired for that program and the product is nished.
Help There is a fault in the control system; the computer will not operate until service is performed.
Control Panel Buttons
Shelf Buttons
Place the product into the oven on one of the six shelf positions. Close the oven doors. Press the shelf position
button that corresponds to the shelf position once for “C” product, twice for “P” product, three times for “E” product,
or four times for off. A beeper will sound once the product is done and “done” will be displayed. Press the ashing
shelf to cancel the beeper.
Minute and
Pace Timers
The “1” button is preset to one minute, the “2” button is preset to two minutes, and the “Pace“ buttons are
adjustable from one to thirty minutes. Press the button once to start the timer. The display will read out the
programmed time and then revert to the previous read out. The timers will countdown internally. Time remaining
can be recalled by pressing the button again.
Canceling a
timer
Any timer can be cancelled at any time. Press and hold the timer to be cancelled until “cancel” appears in the
display.
Loading
Here are some things to remember when loading your oven.
• When loading and unloading the oven, stage products and racks so the oven door is 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 an 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
COMBUSTIBLE MATERIALS.
KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND DRY. IF SPILLS OCCUR,
CLEAN IMMEDIATELY, TO AVOID THE DANGER OF SLIPS OR FALLS.

14
General Operation & Programming cont.
Pace Timers
The pace timers can be set at any time. Press and hold the “PACE” button for three seconds. The display will read
out the set time then begin to ash. Press the “1” minute button to increase the time, or the “2” minute button to
decrease the time. Once the corrected time is set, press and hold the “PACE” button for three seconds to exit the
programming mode.
Program Enable Buttons
The control cannot be put into the programming mode if any of the timers are running. The two blue dots above the
“CINNABON” logo are the program enable buttons. Press the left dot then the right dot within 3 seconds to put the
control into a programming mode. Once the shelf position buttons are set, press the left dot then the right dot within
3 seconds to exit the programming mode. There will be no beeper sound when the buttons are pressed.
Shelf Position Buttons
Put the control into the programming mode. Press the shelf button to be adjusted once for “C” product,
twice for “P” product, or three times for “E” product. The display will read out “CURRENT SET TIME” then begin to
ash. Press the one-minute timer button to increase the time, or the two-minute timer button to decrease the time.
Once the correct time is set move on to another shelf position button or exit the programming mode.
MAINTENANCE
• Oven interiors should be wiped down daily and thoroughly cleaned weekly using warm water and mild detergent.
DO NOT use caustic cleaners.
• The appliance should be thoroughly checked at six-monthly intervals by a qualied technician (heating unit,
mechanical stability, corrosion...) with particular emphasis on all control and safety devices.
CLEANING
• Always start with a cold oven.
• The stainless exterior can easily be cleaned using stainless steel 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 fan wheel.
• The oven racks, rack slides, may be cleaned outside the oven cavity using oven cleaner.
• The oven interior should only be cleaned using a mild soap and a non metal scouring pad.
DO NOT use caustic cleaners.
• Always apply stainless steel cleaners when the oven is cold and rub in the direction of the metal’s grain.
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.
WARNING
CAUTION

15
Troubleshooting
Symptoms & Possible Causes
The following are charts of Symptoms and Possible Causes to aid in diagnosing faults with your unit.
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 cause refer to test to identify test procedures. Test indicated with an “*” should be done by a
Lang factory authorized service representative.
Possible Cause Test
Product is cooked too
long
No test available, operational
condition
Failed Probe Check probe for proper resistance*
Failed Circuit board
Conrm that Circuit board is getting
correct voltage and putting out
correct voltage*
Failed Transformer Check both Primary and Secondary
coils for correct voltage*
Failed Contactor
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*
Failed Motor Conrm that motor is getting correct
voltage*
Failed or disconnected
safety thermostat
Check across the thermostat
connectors for continuity*
Failed Element Conrm that Elements are getting
correct voltage and have continuity*
NOTICE If an item on the list is followed by an asterisk (*), the work should be done by
a Lang factory authorized service representative.
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.
NOTICE ServiceonthisoranyotherLangappliancemustbeperformedbyqualied
personnel only. Consult your Lang Authorized Service Agent Directory. You
can call our toll free number 314-678-6315 or visit our
website WWW.LANGWORLD.COM for the service agent 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.
CAUTION
WARNING
Symptoms Possible Cause
Power indicator is
not lit
No power to cord outlet
Oven unplugged from outlet
Failed Power cord or plug
Failed power switch
Failed indicator light
Oven will not heat
Power Switch is not “ON”
Failed Transformer
Failed Probe
Failed Circuit board
Failed Contactor
Failed Over-temperature Thermostat
Failed Element
Oven motor will not
run
Power Switch is not “ON”
Failed Transformer
Failed Contactor
Failed Motor
Product burning
Product is cooked too long
Failed Probe
Failed Circuit board
Product is under
done
Product is not cooked long enough
Failed Probe
Failed Circuit board

16
2M-61111-39 Rev K
5/22/2009
MODELS: ECOH-C & EHS-C-208/240V W/STEAM OPTION
B
XFMR WIRED FOR 208V TO CHANGE TO 240V DISCONNECT RED 208 LEAD & CONNECT ORANGE 240 LEAD TO TERM BLOCK DO NOT CONNECT BOTH
K
K
CONNECTOR
BACKUP RELAY
24V
HEAT FAN
STM
6
5
4
3
2
1
OPTIONAL
WATER VALVE
OPT
STM SW
HI-LO
ENERGY SWITCH
RTD SENSOR
SYSTEM PROCESSOR
12
TRANSFORMER 10VA
S
L
HI LIMIT
DISC STAT
L
S
DOOR SWITCH
CAP
NCNOC
THERMOSTAT
BACK-UP
SWITCH
NC NO
C
H
L
D
24
240
C
B
A
H
POWER
SWITCH
MOTOR
CONTACTOR #1
CONNECTOR
6
3
5
2
1
4
HEATERS 2500W EA.
GROUND LUG
L
S
A
A
208
C
D
C
CONTACTOR #2
240
SEE
BOTTOM
RIGHT CORNER
OF DRAWING
FOR PWR
TERMINAL
BLOCK
DETAILS
B
PWR TERMINAL BLOCK VIEWS
5
1
3
6
2
4
4
5
L2
L3
L1
A
B
C
D
24 POLE
TERMINAL BLOCK
L2
L3
208 / 240 / 480
3 - PHASE
208 / 240
1 - PHASE
L1
2
6
1
3 5 3
1
6
2
4
2
4
6 5
3
1
L3
L1
N
L2
220 / 380
230 / 400
240 / 475
3 - PHASE
220 / 380
230 / 400
240 / 475
1 - PHASE
N
L3
L2
L1
L1-N L2-N L1-N Total L1 L2 L3 N
220/380 2.1 2.1 2.4 6.7 9.5 9.5 10.9 10.9
230/400 2.3 2.3 2.6 7.2 10.0 10.0 11.3 18.3
240/415 2.5 2.5 2.8 7.8 10.4 10.4 11.6 11.6
L1-L2 L2-L3 L1-L3 Total L1 L2 L3
208 2.5 2.5 2.8 7.8 22.1 20.8 22.1 240 2.5 2.5 2.8 7.8 19.1 18.0 19.1
Voltage
208 Line 1 Line 2 Line 3 Neutral Line 1 Line 2 Neutral
240 1 & 4 2 & 5 3 & 6 - 1, 3 & 5 2, 4, & 6 - 440 1 & 4 2 & 5 3 & 6 - 1, 3 & 5 2, 4, & 6 -
230/380 123 2, 4, & 6 1, 3 & 5 - 2, 4, & 6 230/400 123 2, 4, & 6 1, 3 & 5 - 2, 4, & 6
240/415 123 2, 4, & 6 1, 3 & 5 - 2, 4, & 6
Power Connection Phasing Instructions
Wiring Three Phase Wiring Single Phase
ECOH-C,
EHS-C
Amps 3 Phase
Amps 3 Phase
VoltModel Kw Per Phase
VoltModel Kw
ECOH-C,
EHS-C

17
2M-61111-103-CE Rev B 7-23-08
MODELS: ECOH-2/4CECN Electric Half Size Convection Oven
L1 L2 L3
GROUND LUG
TERMINAL
HEATERS 2500W EA.
4
2
6
3
5
CONNECTOR
CONTACTOR
MOTOR
POWER
SWITCH
H
A
B
C
240
24
D
L
H
C
NO NC
SWITCH
SL
THERMOSTAT OVERTEMP
L
S
TRANSFORMER 10VA
12
RTD SENSOR
C
H L
S
CAPACITOR SNUBBER 47Z1 ZHR14X431
ENERGY SWITCH
N
1
C
24 POLE TERMINAL BLOCK
D B A
CONTACTOR SAFETY
HEAT
CONTACTOR MOTOR
C
SYSTEM PROCESSOR
24V FAN LO HEAT FAN HI STEAM
D
BLOCK
BACKUP
RELAY BACKUP
NORMAL BACKUP
THERMOSTAT BACKUP
NC C NO
D
MOTOR RELAY SECONDARY
C NO NC
A
B
CAP
C
DOOR SWITCH

18
B
K
XFMR WIRED FOR 240V TO CHANGE TO 208V DISCONNECT ORANGE 240 LEAD & CONNECT RED 208 LEAD TO TERM BLOCK DO NOT CONNECT BOTH
CONNECTOR
BACKUP RELAY
24V
HEAT FAN
STM
6
5
4
3
2
1
OPTIONAL
WATER VALVE
OPT
STM SW
RTD SENSOR
SYSTEM PROCESSOR
12
TRANSFORMER 10VA
S
L
HI LIMIT
DISC STAT
L
SDOOR SWITCH
CAP
NCNOC
THERMOSTAT
BACK-UP
SWITCH
NC NO
C
H
L
D
24
240
C
B
A
H
POWER
SWITCH
MOTOR
CONTACTOR #1
CONNECTOR
6
3
5
2
1
4
HEATERS 2500W EA.
GROUND LUG
L
S
A
A
208
C
240
480
240V.
D
5
3
1
L1
24V.
1
2
3
L2
L3
L1
INLET POWER CONNECTION
1
4
2
5
3
6
480V. 3 PH.
00-00-00
C
CONTACTOR #2
240
B
DWG. NO:
SHEET
OF
DWN. DATE :
DWN. BY : CHK. BY :
DESCRIPTION:
WIRING DIAGRAM ECOH-C-480V W/STEAM
2M-61111-W23 REV:
1
1
CAD FILE :
FROM ACAD
CHK. DATE :
REV. BY : REV. DATE :
DLG
REVISIONS
REV. DATE/ECO DESCRIPTION OF CHANGE DR
PWR TERMINAL BLOCK VIEWS
5
1
3
6
2
4
4
5
L2
L3
L1
A
B
C
24 POLE
TERMINAL BLOCK
L2
L3
208 / 240 / 480
3 - PHASE
208 / 240
1 - PHASE
L1
2
6
1
3 5 3
1
6
2
4
2
4
6
L3
L1
N
L2
220 / 380
230 / 400
240 / 475
3 - PHASE
220 / 380
230 / 400
240 / 475
1 - PHASE
N
L3
L2
D
SEE
BOTTOM
RIGHT CORNER
OF DRAWING
FOR PWR
TERMINAL
BLOCK
DETAILS

30
1
2
5
4
3
6
7
14
22
24
23
25 18
19
20
21
29
See
Door Assembly
27
See Body Assembly
See
Controller / Panel
Assembly
SK2330 Rev. B 1/24/14
ECOH-C Complete Assembly
31