Lang RF-21S Series Operating instructions

Lang Manufacturing Company 6500 Merrill Creek Parkway Everett, WA 98203
Rev. # A Phone: [phone] Fax: [phone]
WWW.LANGWORLD.COM © Copyright 2000
Installation, Operation, Maintenance, & Troubleshooting
Model: RF-21S, Range

2
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:

3
TABLE OF CONTENTS
CHAPTER PAGE
1. TABLE OF CONTENTS................................................................................3
2. READ FIRST..................................................................................................4
3. EQUIPMENT DESCRIPTION.......................................................................6
4. UNPACKING.................................................................................................7
5. INSTALLATION............................................................................................8
6. INITIAL START-UP......................................................................................10
7. OPERATION..................................................................................................11
8. MAINTENANCE & CLEANING PROCEDURES......................................12
9. TROUBLESHOOTING..................................................................................13
10. PARTS LISTS.................................................................................................14
11. WIRING DIAGRAMS....................................................................................15
12. WARRANTY..................................................................................................16

4
IMPORTANT READ FIRST IMPORTANT
CAUTION: THE RANGE WEIGHS 410 LBS. (186 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 RANGE WILL BE LOCATED MUST BE
DESIGNED TO SUPPORT THE WEIGHT OF THE
RANGE (410 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 right of Range top controls.
The range 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 unit,
and a faint odor from the smoke. This is normal for a
new range and will disappear after the first few hours
of use.
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.

5
IMPORTANT READ FIRST IMPORTANT
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
authorized service station directory or call the factory at
1-800-224-LANG (5264), or WWW.LANGWORLD.COM
For the service station 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 LANG OR THEIR AUTHORIZED
DISTRIBUTORS CAN CAUSE BODILY INJURY TO THE
OPERATOR AND DAMAGE TO THE EQUIPMENT AND
WILL VOID ALL WARRANTIES.

6
EQUIPMENT DESCRIPTION
Lang Model: RF21S
Electric Range
Exterior
!The Range dimensions are 8” (20.3 cm) High, 38” (96.5cm) Deep, and 36” (91.5cm)
Wide.
!The Sides, Bottom, and Rear wall are constructed stainless steel.
The Range surface can come in 5 different configurations.
Controls
The RF21 Series Rang is available with various controls depending upon model
number. Shown below is a layout of each top configuration with its proper model
number and a brief description of the controls.
The RF21S Ranges can come with a either a standard bake oven, convection oven,
or just as a range top.
RF21S-H or 36S-20
Six French plates controlled by six 6-
heat switches.
RF21S-C or 36S-2
Three Hot Tops controlled by three
850°thermostats.
RF21S-G or 36S-10
One 36”x24” Griddle controlled by
one 450°thermostat.
RF21S-A or 36S-0
One 24”x24” griddle controlled by Two 450°thermostats
and Two French plates controlled by two 6-heat switches.
RF21S-D or 36S-3A
Two 12”x24” Hot tops controlled by two 850°thermostats
and two French plates controlled by two 6-heat switches.

7
Receiving the Range
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.
Location
Prior to un-crating, move the range 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 range 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: RANGE WEIGHS 410 LBS (186 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
RANGE WILL BE LOCATED MUST BE DESIGNED TO
SUPPORT THE WEIGHT OF THE OVEN (410 LBS.).
CAUTION: SHIPPING STRAPS ARE UNDER TENSION AND CAN
SNAP BACK WHEN CUT.
Remove range from skid and place in intended location.
INSTALLING THE LEGS
Legs or Casters are available and must be specified upon ordering.
To install the 6-inch legs, remove the legs from the range packing, place some
cardboard on the floor and gently tip the range onto its back. Fasten the legs into
the threaded holes provided and then gently flip the oven onto its legs.
To install the 6-inch casters, remove the casters from the oven cavity, place some
cardboard on the floor and gently tip the range onto its back. Attach the casters to
the adapter plates. Install the four adapter plates (one in each corner with the flange
pointed toward the oven). Gently tip the oven onto its casters.
UNPACKING

8
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 right of range top controls. 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 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).
Place spacers, (ie. 2 x 4 wood block not supplied) at the front and rear of the oven
top.
Place the range top on the spacers that are located on top of the oven.
The six wire leads to supply electricity to the cook top are bundled under the front
bottom of the top. Route these wires through the bushing provided in the oven top.
Align the four locating pins in the bottom corner of the top with the four holes in
each corner of the oven top.
Remove the spacers and lower the top onto the oven.
CAUTION: MAKE SURE THE SIX WIRE LEADS TO SUPPLY
ELECTRICITY TO THE COOK TOP ARE NOT CRIMPED
BETWEEN THE OVEN AND RANGE TOP.
WARNING: MAKE SURE THE MAIN POWER SUPPLY TO THE RANGE
IS TURNED OFF AT THE SOURCE PRIOR TO
CONNECTING POWER TO THE RANGE.
The range can now be connected to power.
CAUTION: BE SURE THE POWER SUPPLY VOLTAGE
MATCHES THE VOLTAGE SPECIFIED ON THE
NAMEPLATE LOCATED ON THE FRONT OF THE
RANGE.
Use the wiring diagram provided in this manual for determining the connections of the cook top wires to the oven terminal block.

9
Three Phase Single Phase
208 Volt 240 Volt 480 Volt 208 V 240 V
Range style Total
K.W.
Conn L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2
Top Only 15.0 41.7 41.7 41.7 36.1 36.1 36.1 18.1 18.1 18.1 72.1 62.5
Convection
Oven 21.6 48.3 69.2 62.5 41.9 59.9 54.2 20.5 29.5 27.7 103.8 90.0
Bake Oven 21.0 45.8 66.7 62.5 39.7 57.8 54.2 19.9 28.9 27.1 101.0 87.5
Phasing
Three Phase Single Phase
INSTALLATION CONT’D

10
INITIAL START UP
Hot Plates
To "dry out" the Hot Plate, set the thermostat dial at 250°F and turn on the power
switch. Allow unit to cycle at least 15 minutes at this heat level. Reset the
thermostat to 350°F allowing the same time. Then reset the thermostat to 450°F
allowing the same time. Continue doing this until you reach 850°then allow the
unit to maintain this temperature for a minimum of 4 hours. More time may be
required if the unit has to operate in a moist environment.
If the unit is out of use for three or more days, a one-hour preheat schedule should
be used, especially when exposed to high humidity and/or cool temperatures.
French Plates
To “dry out” the French Plate, set the six-heat switch to the first setting and turn on
the power switch. Allow unit to cycle at least 15 minutes at this heat level. Reset
the six-heat switch to position 2 and allow the same time. Reset the six-heat switch
to position 3 and allow the same time. Continue doing this until you reach position
6 then allow the unit to maintain the temperature for a minimum of 4 hours. More
time may be required if the unit has to operate in a moist environment.
If the unit is out of use for three or more days, a one-hour preheat schedule should
be used, especially when exposed to high humidity and/or cool temperatures.
Griddles
To “dry out” the Griddle, set the thermostat to 250°and turn on the power switch.
Allow the unit to cycle at least 15 minutes at this heat level. Reset the thermostat to
350°allow the same time. Reset the thermostat to 450°and allow the unit to
maintain the temperature for a minimum of 4 hours. More time may be required if
the unit has to operate in moist environment.
If the unit is out of use for three or more days, a one-hour preheat schedule should
be used, especially when exposed to high humidity and/or cool temperatures.
NOTICE: During the first few hours of operation you may notice a
small amount of smoke coming off the range, and a
faint odor from the smoke. This is normal for a new
range and will disappear after the first few hours of use.

11
OPERATION
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.
RANGE TOP
Consists of the various top arrangements, depending on specific model purchased:
12" x 24" hot plate controlled by high temperature thermostats. Temperature
ranges from 0°-850°. Recommended: Stock pots and heavy kettle work.
Round French Plates, controlled by indicating type 6-heat switch. Temperature
ranges from 0°-750°. Recommended: Light duty sauce pans and small stockpots.
Not Recommended: Heavy stock pots, or heavy urns, or kettles.
36" x 24" or 24" x 24" grill plates, controlled by thermostats. Temperature ranges
from 0°-450°. Recommended: All heavy and light frying. Set the thermostat dial
at the desired temperature. The red pilot light will be on until the desired
temperature is reached. The pilot light indicates when the plate is heating.

12
MAINTENANCE & CLEANING
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.
The range should be thoroughly cleaned at least once a week in addition to the
normal daily cleaning to insure against the accumulation of foreign material.
CAUTION: Any oven cleaner used should be marked: “Safe On
Aluminum”.
Keep-drip pans under range top plates clean.
Keep hotplate and griddle surfaces clean.
Outside of range and top should be kept clean.
Electric equipment is inherently clean and sanitary, but may become unsanitary if
dirt is allowed to accumulate on it. Take advantage of the clean, sanitary features
of electric equipment, give it the regular attention that it deserves the same as any
other highly perfected machinery, to insure best results and continued high
operating efficiency.
CALIBRATION
Calibration Check
!Place thermometer or thermocouple in the center of oven cavity.
!Set thermostat to 350°and place both 3-heat switches in the “HIGH” position.
!Allow the oven to Preheat for at least half an hour.
!Note cycle on temperatures and cycle off temperatures for 3 cycles. (Red indicator
light indicates when oven is calling for heat)
!After 3 cycles average the temperature. ( Add all six temperatures and divide by 6)
Calibration Adjustment
!A 1/16” flat blade screwdriver with a 2” shaft is required to make adjustments on
the thermostat.
!Maintain the oven temperature at 350°.
!Without turning the thermostat, remove the knob.
!Locate the adjustment screw at the base of the shaft and insert the screwdriver.
!Grasp the shaft and turn the screwdriver. Counter clockwise to increase and
clockwise to decrease (1/8 of a turn will move the temperature 5-7 °in either
direction).
!Reinstall the oven knob and recheck the oven temperature.

13
TROUBLESHOOTING
Symptoms
What follows is a chart of Symptoms, Possible Causes, and Remedy’s to aid in
diagnosing faults with the range.
Refer to the Symptoms column to locate the type of failure then to the Possible
Cause for the items to be checked and the Remedy to column for possible solutions.
SYMPTOM POSSIBLE CAUSE
Hotplate will not heat •No power to Unit
•Defective Thermostat
•Defective element
French plate will not heat •No power to Unit
•Failed 6-heat switch
•Failed element
Griddle plate will not heat •No power to Unit
•Failed Thermostat
•Failed element
TESTS
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.
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
Failed thermostat •Verify calibration
Failed element •Remove the wires and check for continuity
across the element*
Failed 6-heat switch •Call factory or consult service manual for
proper tests
CAUTION: 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.

14
PARTS LIST
DESCRIPTION PART NO.
Element Top Plate 208V O/S 2000 Watts 11010-09
Element Top Plate 208V I/S 3000 Watts 11010-10
Element Top Plate 240V O/S 2000 Watts 11010-21
Element Top Plate 240V I/S 3000 Watts 11010-22
Element Top Plate 480V O/S 2000 Watts 11010-23
Element Top Plate 480V I/S 3000 Watts 11010-24
Element Top Plate 380V O/S 2000 Watts (Marine Units Only) 11010-25
Element Top Plate 380V I/S 3000 Watts (Marine Units Only) 11010-26
Hot Plate Cast Assy. w/ Elements 208V 5000 Watts 11010-341
Hot Plate Cast Assy. w/ Elements 240V 5000 Watts 11010-351
Hot Plate Cast Assy. w/ Elements 480V 5000 Watts 11010-361
Element French Plate 208 Volt 2600 Watts 11120-12
Element French Plate 240 Volt 2600 Watts 11120-13
Element French Plate 480 Volt 2600 Watts 11120-14
Element French Plate 380 Volt 2000 Watts (Marine Units Only) 11120-18
Thumb Screws 1/2-20 x 3/4” (Marine Units Only) 20112-01
Switch Rotating 3 Heat 30304-06
Switch Rotating 6 Heat + Off 30304-09
Thermostat 850°F Hot Top 30402-23
Pilot Light 208/240V 6” Lead Black Body 31601-01
Pilot Light 480V 6” Lead Black Body 31601-02
Element Pan Assembly w/ Snout 50300-20
Grab Bar Assembly 36” Long (Cruise Line Only) 50300-32
Grab Bar Assembly 36” Long (Marine Units Only) 50300-44
Pan Latch Assembly (Marine Units Only) 50300-63
Door Striker Plate (Marine Units Only) 50300-68
French Plate Frame Assembly 50300-82
Door Stop & Slide (Marine Units Only) 50301-50
Range Plate Assembly 1/2” x 1ft 50401-01
Range Plate Assembly 1/2” x 2ft 50401-02
Range Plate Assembly 1/2” x 3ft 50401-03
Ship Rail 13” (Marine Units Only) 50900-01
Ship Rail 24” (Marine Units Only) 50900-02
Ship Rail 35 3/8” (Marine Units Only) 50900-04
Ship Rail Hooked 11 3/8” (Marine Units Only) 50901-01
Ship Rail Hooked 32 1/4” (Marine Units Only) 50901-04
Ship Rail Socket Front (Marine Units Only) 60102-981
Ship Rail Socket Rear (Marine Units Only) 60102-982
Pan/Grease Drawer 60102-29
Knob Thermostat 850°F Hot Top 70701-35
Knob 6 Heat Switch 70701-41
Blower Wheel 71500-03
11010-09
11010-10
11010-21
11010-22
11010-23
11010-24
11010-25
11010-26
11010-341
11010-351
11010-361
11120-12
11120-13
11120-14
11120-18
20112-01
30304-06
30304-09
30402-23
31601-01
31601-02
50300-20
50300-44
50300-82
50301-50
50401-01
50401-02
50401-03
50901-01
60102-981
60102-29
70701-35
70701-41
71500-03

15
RANGE TOP WIRING
GRIDDLE HOT TOP FRENCH PLATE
1. Griddle and Top Plate Element
2. Pilot Light
3. 450°Griddle thermostat
4. Circuit breakers
5. French plate
6. 6-Heat switch
7. Hot Top
8. 850°Hot Top thermostat.