Page 1
Installation,
Operation, and
Maintenance Instructions
Electric Convection Oven Quarter Size
Model
ECOQ-AP
Lang Manufacturing 10 Sunnen Drive St. Louis, MO.63143-3800
Part Number: 2M-W730 Ph: 314-678-6315 Fax: 314-781-2714
Rev B www.langworld.com November 29, 2011
:
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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 #: Location:
Date Purchased: Date Installed:
Purchase Order #: For Service, Call:
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Table of Contents
Chapter Page
1. Table Of Contents ............................................................................................................. 3
2. Read First .......................................................................................................................... 4
3. Equipment Description ...................................................................................................... 5
4. Unpacking.......................................................................................................................... 6
5. Installation.......................................................................................................................... 7
6. Initial Start-Up.................................................................................................................... 8
7. Operation........................................................................................................................... 9
8. Maintenance & Cleaning Procedures............................................................................... 10
9. Troubleshooting................................................................................................................. 11
10. Parts Lists .......................................................................................................................... 13
11. Wiring Diagram.................................................................................................................. 15
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CAUTION: THE OVEN WEIGHS 158 LBS. (71.8
KILOGRAMS). 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.
CAUTION: ANY STAND, COUNTER OR OTHER
DEVICE ON WHICH OVEN WILL BE LOCATED MUST
BE DESIGNED TO SUPPORT THE WEIGHT OF THE
OVEN (158 LBS.).
CAUTION: SHIPPING STRAPS ARE UNDER
TENSION AND CAN SNAP BACK WHEN CUT.
DANGER: THIS APPLIANCE MUST BE
GROUNDED AT THE TERMINAL PROVIDED.
FAILURE TO GROUND THE APPLIANCE COULD
RESULT IN ELECTROCUTION AND DEATH.
WARNING: INSTALLATION OF THE UNIT MUST
BE DONE BY PERSONNEL QUALIFIED TO WORK
WITH ELECTRICITY AND PLUMBING. IMPROPER
INSTALLATION CAN CAUSE INJURY TO
PERSONNEL AND/OR DAMAGE TO EQUIPMENT.
UNIT MUST BE INSTALLED IN ACCORDANCE WITH
ALL APPLICABLE CODES.
NOTICE: The data plate is located behind the oven in
the bottom right corner. 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.
NOTICE: 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.
NOTICE: 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.
CAUTION: ALWAYS KEEP THE AREA NEAR
THE APPLIANCE FREE FROM COMBUSTIBLE
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MATERIALS.
CAUTION: KEEP FLOOR IN FRONT OF
EQUIPMENT CLEAN AND DRY. IF SPILLS OCCUR,
CLEAN IMMEDIATELY, TO AVOID THE DANGER OF
SLIPS OR FALLS.
WARNING: KEEP WATER AND SOLUTIONS OUT OF CONTROLS.
NEVER SPRAY OR HOSE CONTROL CONSOLE,
ELECTRICAL CONNECTIONS, ETC.
CAUTION: 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.
NOTICE: Service on this or any other Lang appliance must be
performed by qualified 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.
WARNING: 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: USE OF ANY REPLACEMENT PARTS OTHER THAN
THOSE SUPPLIED BY STAR OR THEIR AUTHORIZED
DISTRIBUTORS CAN CAUSE BODILY INJURY TO THE
OPERATOR AND DAMAGE TO THE EQUIPMENT AND
WILL VOID ALL WARRANTIES.
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Model: ECOQ-AP
Electric Quarter-Size Convention Oven
Equipment Description
Exterior Construction
The oven exterior dimensions are 19” (48.26cm) Wide, 24” (60.96cm) High, 28”
(71.12cm) deep (with legs) and a 1-3/8” (3.49cm) handle extension on the door.
The Front, Top, and Sides are constructed of stainless steel with an aluminized
back and bottom.
The oven door comes standard with a window and is reversible for either left or
right directional opening.
The door handle is constructed of Stainless Steel and Polymer.
The oven cavity is insulated with high temperature insulation for efficiency and
reduced heat loss.
Interior
The dimensions of the oven cavity are 15-5/8” (39.68cm) Wide, 13” (33cm) High,
14-1/2” (36.83)(cm) Deep.
The oven is designed for three shelves and comes with three Chrome Plated
Racks.
The interior air deflection baffle is constructed of stainless steel.
Operation
The ECOQ is a forced air convention oven with a vented oven cavity.
The air is driven by a 1/6 HP fan motor.
Controls
The ECOQ comes with the Star “Accu-Plus” controls which include:
Easy to use manual control knobs.
Pulse and two speed fan.
Solid State temperature sensing and controls.
Technical
Oven operates as shipped on either 208 or 240 Volt Single Phase on a 20 Amp.
Circuit. It is shipped with a Power Cord and Plug attached.
Floor space required is 19” (48.26cm) Wide, 28” (71.12cm) Deep.
The oven weighs 158 lb. (71.8 Kilograms).
Each oven is shipped with a stacking kit to stack multiple ovens.
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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 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 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 covered by
cardboard box and strapped to a skid. Remove the cardboard cover, cut
the straps and remove the wood frame.
CAUTION: OVEN WEIGHS 158 LBS (71.8 kilograms). 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.
CAUTION: ANY STAND, COUNTER OR OTHER DEVICE ON WHICH
OVEN WILL BE LOCATED MUST BE DESIGNED TO
SUPPORT THE WEIGHT OF THE OVEN (225 LBS.).
CAUTION: SHIPPING STRAPS ARE UNDER TENSION AND CAN
SNAP BACK WHEN CUT.
Remove oven from skid and place in intended location.
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Installation
DANGER: THIS APPLIANCE MUST BE GROUNDED AT THE
TERMINAL PROVIDED. FAILURE TO GROUND THE
APPLIANCE COULD RESULT IN ELECTROCUTION AND
DEATH.
WARNING: INSTALLATION OF THE UNIT MUST BE DONE BY
PERSONNEL QUALIFIED TO WORK WITH ELECTRICITY
AND PLUMBING. IMPROPER INSTALLATION CAN CAUSE
INJURY TO PERSONNEL AND/OR DAMAGE TO
EQUIPMENT. UNIT MUST BE INSTALLED IN
ACCORDANCE WITH ALL APPLICABLE CODES.
NOTICE: The data plate is located above the control panel behind
the screen mesh. 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.
NOTICE: 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.
Electrical Connection
The oven is supplied with a cord and plug connected. The plug provided is
a NEMA-L6-20P. The receptacle is not provided with the oven. The
installer should install a NEMA-L6-20R
plug to reach the outlet.
close enough to the oven for the
Follow the receptacle manufacturer’s instructions when connecting the
receptacle to the power supply.
Oven Voltage
The Star Model ECOQ oven can be operated on 208 Volts or 240 Volt
source. The Amp draw and KW rating at both voltages are listed in the
table below.
MODEL VOLT AMPERAGE
ECOQ-AP 208 3.0 14.0
ECOQ-AP 240 3.9 16.0
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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 three racks are in the oven correctly.
• All packing materials have been removed from the inside of the oven.
POWER ON
When the oven is first turned on the motor will start to run and the indicator
lights will light.
NOTICE: 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.
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Operation
GENERAL
CAUTION: ALWAYS KEEP THE AREA NEAR THE APPLIANCE
FREE FROM COMBUSTIBLE MATERIALS.
CAUTION: KEEP FLOOR IN FRONT OF EQUIPMENT CLEAN AND
DRY. IF SPILLS OCCUR, CLEAN IMMEDIATELY, TO
AVOID THE DANGER OF SLIPS OR FALLS.
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.
Check the product near the end of the initial cooking cycle by turning on the
oven light and looking through the oven door windows.
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.
Load each shelf evenly. Spaces should be maintained equally between the
pan and oven walls, front and back.
For best baking results, load the oven from the top to the bottom during
random loading.
Setting the Temperature
Turn the temperature dial until the line on the knob points at the desired
temperature.
Allow the oven to preheat before placing product into the oven cavity.
The oven may emit a small amount of smoke the first time it is brought up to
temperature. This is caused by the oils associated with the manufacture of
the appliance and is a normal condition. The smoke will stop after the oven
reaches 350 degrees.
Setting the Time
Turn the timer dial until the line on the knob points at the desired time.
The timer will countdown once the time is set. When the timer has reached
zero, a buzzer will sound continuously. Turn the timer dial to “Off” to stop
the buzzer.
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Maintenance & Cleaning
Door Reversal
Remove the three Phillips screws located at the back of the oven securing
the top to the oven.
Remove the top of the oven.
Open door and remove 5/8 bolt in the lower right-hand corner of the
opening.
Remove the 5/8-door pin in the upper left hand corner holding the door to
the oven.
Lift door off lower door pin and set to side.
Remove the lower left-hand door pin and re-install into the lower right-hand
corner.
Place door on lower door pin and re-install the upper 5/8-door pin into the
top of the oven securing door to oven.
Place 5/8 bolt into vacant hole at the lower left of oven.
Re-install top of oven.
Re-install the three Phillip screws at the back securing top to the oven.
Cleaning
WARNING: KEEP WATER AND SOLUTIONS OUT OF CONTROLS.
NEVER SPRAY OR HOSE CONTROL CONSOLE,
ELECTRICAL CONNECTIONS, ETC.
CAUTION: 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.
Always start with a cold oven.
The stainless interiors can easily be cleaned using most domestic or
commercial oven cleaners.
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 and rack slides may be cleaned by removing them from the
oven and soaking them in a solution of ammonia and water.
The stainless steel door liners and oven front should normally be cleaned with a
soap and water solution.
Discoloration or heat tint may be removed with any of the following cleaners:
Penny Brite, Copper Brite, Du-Bois Temp, or Past Nu-Steel.
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 cause refer to the TEST section and locate the Possible Cause then refer to test to
identify test procedures.
Symptom Possible Cause
No power to cord outlet
Oven unplugged from outlet
Power indicator is not lit.
Oven will not heat
Product burning
Failed power cord or plug
Failed power switch
Failed pilot light
Failed element
Power switch is not ON
Failed circuit board
Failed temperature sensor
Failed temperature selector
Product is cooked too long
Failed temperature sensor
Failed circuit board
Failed temperature selector
Open wire between selector and Circuit Board
Product under done
Failed temperature sensor
Failed circuit board
Failed temperature selector
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Troubleshooting cont’d
TESTS
NOTICE: Service on this or any other Lang appliance must be
performed by qualified 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.
WARNING: 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.
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 No test available, operational condition
Failed temperature sensor Unplug the sensor from the control panel circuit board and check for continuity
Failed element Remove the wires and check for continuity across the element
Failed temperature selector
Remove the wires and check the resistance on all the settings
Call the factory for switch resistance values
Remove the wires from the contactor coil and check for continuity across the
contactor coil connection
Failed heat contactor
Failed or disconnected
safety thermostat
Ensure the contactor moveable points move freely up and down
Check for 24 volts at the contactor coil when the computer is running*
Check across the thermostat connectors for continuity
CAUTION: USE OF ANY REPLACEMENT PARTS OTHER THAN
THOSE SUPPLIED BY STAR OR THEIR AUTHORIZED
DISTRIBUTORS CAN CAUSE BODILY INJURY TO THE
OPERATOR AND DAMAGE TO THE EQUIPMENT AND
WILL VOID ALL WARRANTIES.
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Model
ECOQ-AP Quarter Size Convection Oven
EQS-AP-C Quarter Size Convection Oven
SK2296 Rev. - 8/06/07
1
2
4
55
5
3
10
11
56
12
57
13
14
24
23
22
21
20
19
18
17
16
25
33
34
34
35
36
37
29
30
31
30
31
32
38
27
26
28
11
54
41
40
39
42
45
44
43
46
45
47
49
48
50
52
53
51
52
53
15
9
8
6
7
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PARTS LIST November 29, 2011, Rev B
Model No: ECOQ-AP
Quarter Size Electric Convection Oven
Key
Number
1 Q9-25-271 1 TOP ALL
2 2H-25-264 1 BACK INSULATION ALL
3 Q9-25-250 1 VENT ASSEMBLY ALL
4 Q9-25-242 1 OVEN CAN ALL
5 Q9-25-266 1 BOTTOM INSULATION SUPPORT ALL
6 2U-71500-09 1 BLOWER WHEEL EQS - OVEN ALL
7 2N-11090-32 1 ELMNT EQS 208V 2.7KW ALL
8 Q9-25-210 1 FIREWALL ASSY ALL
9 2U-30200-41 1 MTR 1/6HP208/240V1PH1SPD ALL
10 Q9-25-276 1 BACK ALL
11 Q9-25-273 2 SIDES ALL
12 Q9-25-300 1 SWITCH ROD ASSY ALL
13 2E-31400-07 1 XFORMR120-208-240/24V40VA ALL
14 Q9-25-W1254 1 SWITCH ARM ASSY ALL
15 2E-30501-02 1 TRM STRP 3 POLE W/PUSH ON ALL
16 2E-41100-12 1 SENSOR EHS OVEN 450 DEG ALL
17 2T-30401-09 1 STAT FXD 500 DEG OPEN ALL
18 Q9-25-304 1 SPRING SPACER ALL
19 Q9-25-305 1 SPRING STOP WASHER ALL
20 2K-70300-09 1 PIPE 1/4 SCH 40 BLACK ALL
21 2P-51001-12 1 SPRNGCOMPRSN.665IDX1.4LNG ALL
22 Q9-25-320 1 COMPONENT MOUNT ASSY ALL
23 2E-30701-05 1 CONTC 2POLE 30A 24VAC P & ALL
24 2E-30701-04 1 CONTC 2POLE 30A 24VAC ALL
25 2A-72500-02 4 LEG 4 SS MM, GRID, FRYER ALL
26 Q9-25-290 1 TOP HINGE ASSY ALL
27 Q9-25-256 1 BAFFLE ALL
28 2U-71500-10 1 BLOWER WHEEL EQS - ALL
29 Q9-25-414 1 PANEL SPOTWELD - AP ALL
30 2R-70701-53 2 KNOB SPECIAL #2-SET SCREW ALL
31 2J-31601-07 3 PILOT LT 28V 6 LEAD WHT ALL
32 2C-20602-03 3 TINNERMAN 3SCLIP 5/16 ALL
33 2E-40101-W19 1 CIRBD SI TEMP CNTRL NO ALL
34 2E-30303-06 2 SWT TOG ON-ON DPDT BLK ALL
35 2E-30304-16 1 CIR.BD.SWITCH 140’-450’F ALL
36 2C-31004-02 2 TERM FEM 1/4 18/22GA INS ALL
37 2J-30802-04 1 BUZZER ELEC 24V AC PIEZIO ALL
38 PS-60101-W4 1 ELEC. TIMER KIT, 1HR-24VAC ALL UNITS MFG BEFORE 11-2010
2J-30800-W05 1 MECH. - ELEC TIMER 1HR-24 ALL UNITS MFG AFTER 11-2010
39 2C-20101-24 AR SCRW MS PLT 10-32 X .375 ALL
40 Q9-25-287 1 DOOR HANDLE - WINDOW DOOR ALL
41 2C-20102-08 2 SCRW PHD ST 8-32X.375 ALL
42 2R-50800-91 1 DOOR HANDLE ALL
43 2C-20303-07 1 NUT HX SS 5/16-18 ALL
44 Q9-25-293 2 BOTTOM DOOR PIVOT ALL
45 2P-70201-05 2 BRNZBRFLN5/16IDX1/2ODX3/8 ALL
46 Q9-25-282-1 1 DOOR OUTSIDE - WINDOW ALL
47 Q9-50800-90 1 MACHINE TOP PIVOT PIN ALL
48 Q9-25-284 2 DOOR BAND ALL
49 2Q-71301-04 1 WINDOW ASSY 9-5/8X16-5/8 ALL
50 Q9-25-286 2 MAGNET HOLDER ALL
51 Q9-25-283-1 1 DOOR INSIDE - WINDOW DOOR ALL
52 2H-25-265-2 2 DOOR INSULATION W/WINDOW ALL
Part
Number
Qty
Per
Description
IMPORTANT: WHEN ORDERING, SPECIFY VOLTAGE OR TYPE GAS DESIRED PAGE 1
INCLUDE MODEL AND SERIAL NUMBER OF 2
Some items are included for illustrative purposes only and in certain instances may not be available.
Page 16
PARTS LIST November 29, 2011, Rev B
Model No: ECOQ-AP
Quarter Size Electric Convection Oven
Key
Number
53 2H-25-265-1 4 DOOR INSULATION W/WINDOW ALL
54 Q9-25-230 1 FRONT ASSEMBLY ALL
55 2H-25-261 1 BOTTOM INSULATION ALL
56 Q9-25-200 1 BOTTOM ASSY ALL
57 P9-50309-106 1 SLEEVING 5/8ID NAT ALL
58 2K-70801-07 3 SPACER, SUPPORT 1/2 lg ALL *NOT SHOWN
Part
Number
Qty
Per
Description
2
IMPORTANT: WHEN ORDERING, SPECIFY VOLTAGE OR TYPE GAS DESIRED PAGE
2
INCLUDE MODEL AND SERIAL NUMBER OF
Some items are included for illustrative purposes only and in certain instances may not be available.
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