Lang EQS-C Operators Manual
Service Manual for the Lang Models:
EQS-AP, EQS-C
Lang Manufacturing Company 6500 Merrill Creek Parkway Everett, WA 98203
Phone: 1-800-224-5264 Fax: 1-425-349-2733
www.langworld.com
©Copyright 2000
TABLE OF CONTENTS
CHAPTER
1. TABLE OF CONTENTS..........................................................................................2
2. READ FIRST...........................................................................................................3
3. EQUIPMENT DESCRIPTION .................................................................................5
4. INSTALLATION ......................................................................................................6
5. START-UP..............................................................................................................7
6. CONTROL PANEL LAYOUT ..................................................................................8
7. PROGRAMMING TERMS ......................................................................................10
8. PROGRAMMING .................................................................................................... 11
9. GENERAL OPERATION......................................................................................... 13
10. TYPICAL OPERATION ..........................................................................................14
11. SEQUENCE OF OPERATION................................................................................ 15
PAGE
12. TROUBLESHOOTING............................................................................................16
13. TECHNICAL DATA ................................................................................................. 21
14. WIRING DIAGRAMS ..............................................................................................24
15. PARTS LIST ........................................................................................................... 26
2
IMPORTANT READ FIRST IMPORTANT
CAUTION
CAUTION
CAUTION
DANGER
WARNING
NOTICE
NOTICE
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.
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 on the back side of the oven above the power cord. 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.
NOTICE
CAUTION
CAUTION
WARNING
CAUTION
NOTICE
During the first 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 oven and will disappear after the first few hours of use.
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.
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.
3
IMPORTANT READ FIRST IMPORTANT
NOTICE
WARNING
NOTICE
CAUTION
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.
If an item on the list is followed by an asterisk (*), the work should be done
by a 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.
4
EQUIPMENT DESCRIPTION
Lang Model: EQS
Electric Quarter Size Convention Oven
EXTERIOR
• The oven exterior dimensions are 19” (48.3 cm) Wide, 20.3” (51.5 cm) High, 27”
(68.6 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 oven cavity is insulated with high temperature insulation for efficiency and
reduced heat loss.
INTERIOR
• The oven cavity dimensions are 15” (38.1 cm) Wide, 13” (33 cm) High, 14.5” (36.8
cm) Deep.
• The oven is designed for a maximum of three shelves and comes with three Chrome
Plated Racks.
• The interior of the oven is constructed of stainless steel.
OPERATION
• The EQS oven is a forced air convection oven with a vented oven cavity.
• The air is driven by a 1/6 HP fan motor.
CONTROLS
• The EQS is available either with the Lang Accu-Plus (EQS-AP), “Purple” Computer
(EHS-C) controls which include:
• EQS-AP
Easy to use manual control knobs.
Pulse and two speed fan.
Solid State temperature sensing and controls.
• EQS-C
Complete Computerized Controls with a Manual Override system.
Programmable up to 10 products with four “tiers” for each program.
Independent Shelf Timers for each Shelf.
Load Control through use of Cooking Curves.
Shelf Compensation Timing for uniform baking.
Single speed fan.
5
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 Lang Manufacturing Company. File your claim
with the carrier.
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.
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 EQS is provided with a 48” cord and a NEMA #6-20 plug.
The EQS is not available in 480 Volt.
INSTALLATION
INSTALLING THE LEGS
Remove the legs from the oven cavity and screw them into the threaded holes provided on
the bottom of the oven.
A torpedo level placed on an oven rack will assist in leveling the oven.
Level the unit by unscrewing the adjuster on the bottom of each of the legs until the unit is
level.
PHASING
The EQS is provided with 208 or 240 VAC single phase only.
6
EQS-AP, EQS-C
Convection Oven Start-Up
1) Verify connections at plug and terminal block
2) Incoming Volt - Single Phase L1-L2______
Three Phase L1-L2______ L2-L3______ L3-L1______
3) Amp draw L1______
L2______
L3______
4) Motor amp draw ______
5) Are programs correct? Yes No
6) Verify actual temperature at 350 °F ________ °F.
Note:
Install thermocouple wire in center of oven cavity.
Let oven cycle off and on 3 times before recording temperature.
START-UPS
Set oven temperature for 350 °F
Model #_______ Date_______ Serial #________
Store #___________ Tech Name___________________
Contact_______________ Company _________________________
Store Phone #___________ Service Company Phone #______________
Address_____________________
______________________
______________________
7
CONTROL PANEL LAYOUT EQS-AP
8
CONTROL PANEL LAYOUT EQS-C
9
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