GAS COOKTOP
COS-GRT366
COS-GRT486G
GRT SLIDE-IN COOKTOP SERIES
INSTALLATION & USER MANUAL
IMPORTANT:
INSTALLER:
HOMEOWNER:
READ AND SAVE THESE INSTRUCTIONS.
FOR RESIDENTIAL USE ONLY.
PLEASE LEAVE THIS GUIDE WITH THE HOMEOWNER.
PLEASE KEEP THIS GUIDE FOR FUTURE REFERENCE.
Rev.22.05
THANK YOU FOR YOUR PURCHASE
Thank you for your purchase. We know that you have many brands and
products to choose from and we are honored to know that you have decided
to take one of our products into your home and hope that you enjoy it.
COSMO Appliances are designed according to the strictest safety and
performance standard for the North American market. We follow the most
advanced manufacturing philosophy. Each appliance leaves the factory after
thorough quality inspection and testing. Our distributors and our service
partners are ready to answer any questions you may have regarding how to
install, use and case for your products. We hope that this manual will help you
learn to use the product in the safest and most effective manner.
Before using this product, please read through this manual carefully. Keep
this user manual in a safe place for future reference. Please ensure that other
persons using this product are familiar with these instructions as well.
If you have any questions or concerns, please contact the dealer from whom you
purchased the product, or contact our Customer Support at:
1-888-784-3108
Reach us online at:
www.cosmoappliances.com
1
TABLE OF CONTENTS
COOKTOP SAFETY ............................................................................................ 3
Important Safety Instructions ................................................................................. 6
INSTALLATION REQUIREMENTS ...................................................................... 9
Tools and Parts .......................................................................................................... 9
Location Requirements ............................................................................................ 11
Product Dimensions ................................................................................................. 12
Clearances ................................................................................................................. 13
Cutout Dimensions ................................................................................................... 14
Electrical Requirements ........................................................................................... 15
Gas Supply Requirements ...................................................................................... 16
INSTALLATION INSTRUCTIONS ...................................................................... 19
Unpack Cooktop....................................................................................................... 19
Install Cooktop ......................................................................................................... 20
Gas Connection ........................................................................................................ 21
Complete Connection ............................................................................................ 23
Adjust Flame Height .......................................................................................... 25
GAS CONVERSION ......................................................................................... 27
Convert Gas Pressure Regulator .......................................................................... 27
Convert Surface Burners ........................................................................................ 29
Complete Gas Conversion ..................................................................................... 32
OVERVIEW ...................................................................................................... 33
COOKTOP USE ................................................................................................ 35
Power Failure ........................................................................................................... 36
Cookware ................................................................................................................. 37
COOKTOP CARE ............................................................................................. 38
TROUBLESHOOTING ....................................................................................... 41
LIMITED WARRANTY ...................................................................................... 43
2
COOKTOP SAFETY
WARNING
Fire Hazard
If the information in this manual is not followed exactly, a fire or explosion
may result causing property damage, personal injury or death.
- Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Do not use any phone in your building.
• Clear the room, building, or area of all occupants.
• Immediately call your gas supplier from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach your gas supplier, call the fire department.
- Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
WARNING
Never Operate the Top Surface Cooking Section of this Appliance
Unattended.
• Failure to follow this warning statement could result in fire, explosion, or
burn hazard that could cause property damage, personal injury, or
death.
• If a fire should occur, keep away from the appliance and immediately call
your fire department.
DO NOT ATTEMPT TO EXTINGUISH AN OIL/GREASE FIRE WITH WATER
3
WARNING: Gas leaks cannot always be detected by smell.
Gas suppliers recommend that you use a gas detector approved by UL or
CSA.
For more information, contact your gas supplier.
WARNING: Do not install a ventilation system that blows air downward
toward this cooking appliance. This type of ventilation system may cause
ignition and combustion problems with this cooking appliance resulting in
personal injury or unintended operation.
Your safety and the safety of others are very important.
We have provided many important safety messages in this manual and on
your appliance. Always read and obey all safety messages.
This is the safety alert symbol.
This symbol alerts you to potential hazards that can
kill or hurt you and others.
All safety messages will follow the safety alert symbol
and either the word "DANGER," "WARNING" or
"CAUTION." These words mean:
You can be killed or seriously
DANGER
WARNING
CAUTION
All safety messages will tell you what the potential hazard is, tell you how
to reduce the chance of injury, and tell you what can happen if the
instructions are not followed.
4
injured if you don't immediately
follow instructions.
You can be killed or seriously
injured if you don't follow
instructions.
A potentially hazardous situation
which, if not avoided, could result
in minor or moderate injury.
In the State of Massachusetts, the following installation instructions apply:
• Installations and repairs must be performed by a qualified or licensed
contractor, plumber, or gasfitter qualified or licensed by the State of
Massachusetts.
• If using a ball valve, it shall be a T-handle type.
• A flexible gas connector, when used, must not exceed 3 feet.
California Proposition 65 Warning
WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
5
IMPORTANT SAFETY
INSTRUCTIONS
WARNING: To reduce the risk of fire, electrical shock, injury to persons, or
damage when using the cooktop, follow basic precautions, including the
following:
• WARNING: NEVER use this
appliance as a space heater to
heat or warm the room. Doing so
may result in carbon monoxide
poisoning and overheating of the
oven.
• Do not touch any part of the
cooktop, including but not limited
to cooktop burners during or
immediately after cooking.
• CAUTION: Do not store items of
interest to children in cabinets
above the cooktop – children
climbing on the cooktop to reach
items could be seriously injured.
• Do Not Leave Children Alone –
Children should not be left alone
or unattended in area where
appliance is in use. They should
never be allowed to sit or stand
on any part of the appliance.
• Wear Proper Apparel – Loose-
fitting or hanging garments
should never be worn while using
the appliance.
• User Servicing – Do not repair or
replace any part of the appliance
unless specifically recommended
in the manual. All other servicing
should be referred to a qualified
technician.
• Storage in or on appliance –
Flammable materials should not
be stored in an oven or near
surface units.
• Do Not Use Water on Grease
Fires – Smother fire or flame or
use dry chemical or foam-type
extinguisher.
• Use Only Dry Potholders – Moist
or damp potholders on hot
surfaces may result in burns from
steam. Do not let potholder touch
hot surface units. Do not use a
towel or other bulky cloth.
• Never Leave Surface Units
Unattended at High Heat
Settings – Boilover causes
smoking and greasy spillovers
that may ignite.
• Glazed Cooking Utensils – Only
certain types of glass,
glass/ceramic, ceramic,
earthenware, or other glazed
utensils are suitable for rangetop service without breaking due
to the sudden change in
temperature.
READ AND SAVE THESE INSTRUCTIONS
6
IMPORTANT SAFETY
INSTRUCTIONS
• Utensil Handles Should Be Turned
Inward and Not Extend Over
Adjacent Surface Units – To
reduce the risk of burns, ignition
of flammable materials, and
spillage due to unintentional
contact with the utensil, the
handle of a utensil should be
positioned so that it is turned
inward, and does not extend over
adjacent surface units.
• Make sure the cooktop holddown brackets are properly
installed.
• Disconnect the electrical supply
before servicing.
• Do not use replacement parts
that have not been
recommended by the
manufacturer (e.g. parts made at
home using a 3D printer).
• Clean Cooktop With Caution – If
a wet sponge or cloth is used to
wipe spills on a hot cooking area,
be careful to avoid steam burn.
Some cleaners can produce
noxious fumes if applied to a hot
surface.
• Do Not Heat Unopened Food
Containers – Build-up of pressure
may cause container to burst and
result in injury.
• Proper Installation – The
appliance, when installed, must
be electrically grounded in
accordance with local codes, or
in the absence of local codes,
with the National Electrical Code,
ANSI/NFPA 70 or the Canadian
Electrical Code, CSA C22.1-02. In
Canada, the appliance must be
electrically grounded in
accordance with Canadian
Electrical Code. Be sure your
appliance is properly installed
and grounded by a qualified
technician.
• This cooktop is equipped with a
three-prong grounding plug for
your protection against shock
hazard and should be plugged
directly into a properly grounded
receptacle. Do not cut or remove
the grounding prong from this
plug.
• Disconnect the electrical supply
before servicing.
• Injuries may result from misuse of
the cooktop such as stepping,
leaning, or sitting on the top
surface.
• Maintenance – Keep cooktop
area clear and free from
combustible materials, gasoline,
and other flammable vapors and
liquids.
READ AND SAVE THESE INSTRUCTIONS
7
IMPORTANT SAFETY
INSTRUCTIONS
• Do not let cooking grease or
other flammable materials
accumulate on the cooktop.
Grease on the cooktop may
ignite.
• Top burner flame size should be
adjusted so it does not extend
beyond the edge of the cooking
utensil. This instruction is based
on safety considerations.
• Have the installer show you the
location of the cooktop gas shutoff valve and how to turn it off if
necessary.
• Proper Disposal of Your
Appliance – Dispose of or recycle
your appliance in accordance
with Federal and Local
Regulations. Contact your local
authorities for the
environmentally safe disposal or
recycling of your appliance.
For units with ventilating hoods:
• Clean Ventilating Hoods
Frequently – Grease should not
be allowed to accumulate on
hood or filter.
• When flaming foods under the
hood, turn the fan on.
READ AND SAVE THESE INSTRUCTIONS
8
INSTALLATION REQUIREMENTS
TOOLS AND PARTS
Gather the required tools and parts before starting installation. Read and
follow the instructions provided with any tools listed here.
Tools Needed
• Tape measure
• Flat-blade screwdriver
• Phillips screwdriver
• Wrench or pliers
• Pipe wrench
• 15/16" (2.4 cm) combination
wrench
• Marker or pencil
• Pipe-joint compound resistant
to Propane gas
• Noncorrosive leak-detection
solution
For Propane/Natural Gas
Conversions
• 1/2" (1.3 cm) combination
wrench
• 1/4" (6 mm) nut drive
• 9/32" (7 mm) nut drive
• Masking tape
Parts Supplied
Back panel rubber pads (2) Adjustable feet (4)
(Pre-installed)
Gas pressure regulator
(Pre-installed)
9
Parts Needed
Gas supply line kit
(supply line and 2 adapters)
Optional Parts
To purchase these or any other accessories, please visit
www.cosmoappliances.com or reference the contact information at the end
of this manual.
• LP conversion kits
Scan to find
available LP kits
10
LOCATION REQUIREMENTS
IMPORTANT: Observe all governing codes and ordinances. Do not obstruct
flow of combustion and ventilation air.
• This cooktop is for indoor household use only.
• It is the installer's responsibility to comply with installation clearances
specified on the model/serial rating plate. The model/serial rating plate is
located on the underside of the cooktop base.
• The cooktop should be installed in a location away from strong draft areas,
such as windows, doors, and strong heating vents or fans.
• Recessed installations must provide complete enclosure of the sides and
rear of the cooktop.
• All openings in the wall or floor where cooktop is to be installed must be
sealed.
• Do not seal the cooktop to the side cabinets.
• Cabinet opening dimensions that are shown must be used. Given
dimensions are minimum clearances.
• Grounded electrical supply is required. See "Electrical Requirements"
section.
• Proper gas supply connection must be available. See "Gas Supply
Requirements" section.
• The gas and electric supply should be accessible without requiring removal
of the cooktop.
IMPORTANT: To avoid damage, check with your builder or cabinet supplier to
make sure that the materials used will not discolor, delaminate or sustain
other damages.
Mobile Home - Additional Installation Requirements
• The installation of this cooktop must conform to the Manufactured Home
Construction and Safety Standard, Title 24 CFR, Part 3280 (formerly the
Federal Standard for Mobile Home Construction and Safety, Title 24, HUD
Part 280). When such standard is not applicable, use the Standard for
Manufactured Home Installations, ANSI A225.1/NFPA 501A or with local
codes.
In Canada, the installation of this cooktop must conform with the current
standards CAN/CSA-Z240-latest edition, or with local codes.
11
PRODUCT DIMENSIONS
Note: Cooktop features may differ.
COS-GRT366
0.8"
27.4"
(2.0 cm)
25.8"
(65.4 cm)
8.7"
(22.0 cm)
(69.5 cm)
COS-GRT486G
27.4"
0.8"
(2.0 cm)
25.8"
(65.4 cm)
8.7"
(22.0 cm)
(69.5 cm)
24.0"
(61.0 cm)
24.0"
(61.0 cm)
36.0"
(91.4 cm)
47.9"
(121.6 cm)
6.9"
(17.4
cm)
27.0"
(68.5 cm)
24.0"
(61.0 cm)
25.8"
(65.4 cm)
27.4"
(69.5 cm)
27.0"
24.0"
(61.0 cm)
3.0"
(7.6 cm)
6.9"
(17.4 cm)
(22.0 cm)
3.0"
(7.6 cm)
0.8"
(2.0 cm)
8.7"
6.9"
(17.4 cm)
0.8"
(2.0 cm)(68.6 cm)
12
6.9"
(17.4 cm)
25.8"
(65.4 cm)
27.4"
(69.5 cm)
8.7"
(22.0 cm)
CLEARANCES
IMPORTANT: Some cabinet and building materials are not designed to
withstand the heat produced by the cooktop. Check with your builder or
cabinet supplier to make sure that the materials used will not discolor,
delaminate or sustain other damage.
GIVEN DIMENSIONS ARE MINIMUM CLEARANCES.
13 in
(33 cm)
Maximum
Overhead
Cabinet
Depth
18 in
(45.7 cm)
6 in
(15.2 cm)
to left
wall
30 in
(76.2 cm)
A
6 in
(15.2 cm)
to right
wall
36 in
(91.4 cm)
24 in
(61.0 cm)
Lower
Cabinet
Depth
MODEL A
COS-GRT366 36" (91.4 cm)
COS-GRT486G 48" (122 cm)
NOTE:
• 30" (76.2 cm) minimum clearance between cooking surface and bottom of
the overhead cabinet.
IMPORTANT: If installing a range hood, hood liner, or microware hood
combination above the cooking surface, follow the range hood or
microwave hood combination installation instructions for dimensional
clearances above the cooktop surface.
• 18" (45.7 cm) minimum clearance from upper cabinet to countertop on
either side of unit.
13
• If back wall is constructed of a combustible material and a backguard is not
installed, a minimum clearance of 6" is required for all models.
CUTOUT DIMENSIONS
GIVEN DIMENSIONS ARE MINIMUM CLEARANCES.
B
E
F
D
C
G
A
MODEL A B C D E F G
1
36
COS-GRT366
COS-GRT486G
/8"
(91.8 cm)
48"
(122 cm)
24"
(61.0 cm)
7
6
/8"
(17.4 cm)
5 3/8"
(13.6 cm)
6 1/2"
(16.5 cm)
18.5"
(47.0 cm)
2 1/4"
(5.7 cm)
Note:
• A minimum clearance of ¾" (19 mm) from the back of cabinet cutout to gas
opening cutout is recommended.
14
ELECTRICAL REQUIREMENTS
WARNING
Electrical Shock Hazard
Plug into a grounded 3 prong outlet.
Do not remove ground prong.
Do not use an adapter or extension cord.
Failure to do so can result in death, fire or electrical shock.
IMPORTANT: The cooktop must be electrically grounded in accordance with
local codes and ordinances, or in the absence of local codes, with the
National Electrical Code, ANSI/NFPA 70 or Canadian Electrical Code, CSA
C22.1.
Do not ground the cooktop to any gas line or gas pipe.
This cooktop is equipped with an electronic ignition system that will not
operate if plugged into an outlet that is not proper polarized.
If codes permit and a separate ground wire is used, it is recommended that a
qualified electrical installer determine that the ground path is adequate and
wire gauge is in accordance with local codes.
A copy of the above code standards can be obtained from:
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02169-7471
CSA International
8501 East Pleasant Valley Road
Cleveland, OH 44131-5575
A 110 V, 50/60 Hz, AC only, 15 A, fused electrical circuit is required. A timedelay fuse or circuit breaker is also recommended. It is recommended that a
separate circuit serving only this cooktop is provided.
15
Electronic ignition systems operate within wide voltage limits, but proper
grounding and polarity are necessary. Check that the outlet provides 120 V
power and is correctly grounded.
WARNING: Improper connection of the equipment-grounding conductor can
result in a risk of electric shock. Check with a qualified electrician or service
technician if you are in doubt as to whether the appliance is properly
grounded. Do not modify the power supply cord plug. If it will not fit the
outlet, have a proper outlet installed by a qualified electrician.
GAS SUPPLY REQUIREMENTS
WARNING
Explosion Hazard
Use a new CSA International approved gas supply line.
Install a shut-off valve.
Securely tighten all gas connections.
If connected to LP, have a qualified person make sure gas pressure does
not exceed 14" (36 cm) water column.
Examples of a qualified person include:
• licensed heating personnel,
• authorized gas company personnel, and
• authorized service personnel.
Failure to do so can result in death, explosion or fire.
Observe all governing codes and ordinances.
IMPORTANT: This installation must conform with all local codes and
ordinances. In the absence of local codes, installation must conform with
National Fuel Gas Code, ANSI Z223.1/NFPA 54 or, in Canada, the Natural Gas
and Propane Installation Code, CSA B149.1 - latest edition.
IMPORTANT: Cooktop must be connected to a regulated gas supply.
16
IMPORTANT: Leak testing of the cooktop must be conducted according to the
manufacturer's instructions.
TYPE OF GAS
Natural Gas:
This cooktop is factory-set for use with Natural gas. The model/serial rating
plate located on the underside of the cooktop base has information on the
types of gas that can be used. If the types of gas listed do not include the type
of gas available, check with the local gas supplier.
LP Gas Conversion:
Conversion must be performed by a qualified service technician. The qualified
agency performing this work assumes the gas conversion responsibility.
No attempt shall be made to convert the appliance from the gas specified on
the model/serial rating plate for use with a different gas without consulting
the serving gas supplier. See "GAS CONVERSION" section.
GAS SUPPLY LINE
Provide a gas supply line of 3/4" (1.9 cm) rigid pipe to the cooktop location. A
smaller size pipe on longer runs may result in insufficient gas supply. Pipe-joint
compounds that resist the action of LP gas must be used. With LP gas, piping
or tubing size can be 1/2" (1.3 cm) minimum. Usually, LP gas suppliers
determine the size and materials used in the system.
IMPORTANT: All connections must be wrench-tightened. Do not make
connections to the gas pressure regulator too tight. Making the connections
too tight may crack the regulator and cause a gas leak. Do not allow the
regulator to turn or move when tightening fittings.
Flexible metal appliance connector:
• If local codes permit, a new CSA design-certified, 4 - 5 ft (122 - 152.4 cm)
long, 1/2" (1.3 cm) or 3/4" (1.9 cm) I.D., flexible metal appliance connector
may be used for connecting cooktop to the gas supply line.
• A 1/2" (1.3 cm) male pipe thread is needed for connection to the female pipe
threads of the inlet to the appliance pressure regulator.
• Do not kink or damage the flexible metal tubing when moving the cooktop.
17
Rigid pipe connection:
The rigid pipe connection requires a combination of pipe fittings to obtain an
in-line connection to the cooktop. The rigid pipe must be level with the
cooktop connection. All strains must be removed from the supply and fuel
lines so cooktop will be level and in line.
Gas shutoff valve:
A manual gas line shut-off valve must be installed in an easily accessible
location. Do not block access to shut-off valve. The valve is for turning on or
shutting off gas to the cooktop.
a b c
supply line
Gas
a
Shutoff valve "open" position
b
To cooktop
c
GAS PRESSURE REGULATOR
The gas pressure regulator supplied with this cooktop must be used. The inlet
pressure to the regulator should be as follows for proper operation:
TYPE OF GAS MINIMUM PRESSURE MAXIMUM PRESSURE
Natural gas 4" WCP 5" WCP
LP gas 10" WCP 12" WCP
Contact local gas supplier if you are not sure about the inlet pressure.
er Input Requirements
Burn
Input ratings shown on the model/serial rating plate are for elevations up to
2,000 ft (609.6 m).
For elevations above 2,000 ft (609.6 m), ratings are reduced at a rate of 4%
for each 1,000 ft (304.8 m) above sea level (not applicable for Canada).
18
GAS SUPPLY PRESSURE TESTING
Gas supply pressure for testing regulator must be at least 1" (2.5 cm) water
column pressure above the manifold pressure shown on the model/serial
rating plate.
Line pressure testing above 0.5 psi gauge (14" WCP)
The cooktop and its individual shutoff valve must be disconnected from the
gas supply piping system during any pressure testing of that system at test
pressures in excess of 0.5 psi (3.5 kPa).
Line pressure testing at 0.5 psi gauge (14" WCP) or lower
The cooktop must be isolated from the gas supply piping system by closing its
individual manual shutoff valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).
INSTALLATION INSTRUCTIONS
IMPORTANT: This appliance shall be installed only by authorized persons and
in accordance with the manufacturer's installation instructions, local gas
fitting regulations, municipal building codes, electrical wiring regulations,
local water supply regulations.
UNPACK COOKTOP
WARNING
Excessive Weight Hazard
Use two or more people to move and install cooktop.
Failure to do so can result in back or other injury.
1. Remove shipping materials, tape and film from the cooktop. Do not dispose
of anything until the installation is complete.
2. Set aside the surface burners and grates if they are not pre-installed.
19
INSTALL COOKTOP
1. Decide on the final location for the cooktop.
2. Install the rubber pads to the back panel of cooktop.
3. The flexible gas supply line connector can be assembled to the cooktop
now or after the cooktop is installed in the cutout. See the "Gas Connection"
section.
4. Using two or more people, place cooktop into the countertop cutout.
Note: Check that the front edge of the cooktop is parallel to the front edge
of the counter top. If repositioning is needed, lift entire cooktop up from
cutout to avoid scratching the countertop.
5. If necessary, rotate the adjustable feet below the cooktop to level the
cooktop in the countertop cutout.
20
GAS CONNECTION
WARNING
Explosion Hazard
Use a new CSA International approved gas supply line.
Install a shut-off valve.
Securely tighten all gas connections.
If connected to LP, have a qualified person make sure gas pressure does
not exceed 14" (36 cm) water column.
Examples of a qualified person include:
• licensed heating personnel,
• authorized gas company personnel, and
• authorized service personnel.
Failure to do so can result in death, explosion or fire.
This appliance shall be installed only by authorized persons and in
accordance with the manufacturer's installation instructions, local gas fitting
regulations, municipal building codes, electrical wiring regulations, local
water supply regulations.
This cooktop is factory-set for use with Natural gas. To use this cooktop with
Propane gas, see the "Gas Conversions" section before connecting this
cooktop to the gas supply. Gas conversions from Natural gas to Propane gas
or from Propane gas to Natural gas must be done by a qualified installer.
TYPICAL FLEXIBLE CONNECTION
The following shows a typical connection. Your connection may be different
according to the supply line type, size, and location.
1. Make sure the gas line shut-off valve is close.
21
2. Apply pipe-joint compound made for use with Natural and LP gas to the
smaller thread end on one of the flexible connector adapters and the ½"
pipe fitting at the bottom right of the cooktop base.
3. Attach one end of the flexible connector without an adapter to the ½" pipe
fitting at the bottom right of the cooktop base, and the other end with the
pipe-joint compound applied adapter to the gas shutoff valve. Check that
connector is not kinked.
Note: A gas pressure regulator is pre-installed at the bottom of the
cooktop.
Gas pressure regulator
¾" male pipe thread
4. Tighten all connections, being certain not to move or turn the gas pressure
regulator. Use a combination wrench and channel lock pliers where
necessary.
No obstructions below cooktop
A
B
C
D
A. ½" manifold entrance
B. Flexible connector
C. Flare union adapter
D. Manual gas shutoff valve
22
Suggested installation to avoid
interference below cooktop
Gas flow into cooktop
A. ½" manifold entrance
B. ¾" (1.9 cm) elbow
C. Flare union adapter
D. Flexible connector
E. Flare union adapter
F. Manual gas shutoff valve
A
B
C
D
E
F
CONVERT TO LP GAS (OPTIONAL)
This cooktop is shipped from the factory set up to use natural gas. It can be
converted to use LP gas by a qualified service technician.
The LP conversion kit is sold separately. The conversion to LP requires all
surface burner orifices to be changed. In addition, the nozzle on the gas
pressure regulator needs to be reversed.
See "GAS CONVERSION" section for detailed instructions.
NOTE: All replaced orifices must be left with the consumer, including the
instructions and retrofit sizes and orifice indication.
COMPLETE CONNECTION
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Plug into a grounded 3-prong outlet.
Do not use an adapter or an extension cord.
Failure to do so can result in death, fire, or electrical shock
1. Open the manual shutoff valve in the gas supply line. The valve is open
when the handle is parallel to the gas pipe.
2. Test all connections by brushing on an approved noncorrosive leak-
detection solution. If bubbles appear, a leak is indicated. Correct any leak
found.
3. Remove, if any, packaging tapes securing the burners on the surface. If the
cooktop burner bases and caps are not pre-installed, remove them from
package containing parts, align and place the burner bases and caps
accordingly.
23
C B C
A B A
COS-GRT366
A. Super Rapid (Large)
B. Rapid (Medium)
C. Semi Rapid (Small)
A A A
C
A B A
Note: Align notches in burner caps with pins in burner base. Burner caps
should be level when properly positioned. If burner caps are not properly
positioned, surface burners will not light.
Cap
Base
Standard burner
4. Place burner grates over burners and caps.
5. Plug in cooktop or reconnect power.
COS-GRT486G
A. Rapid (Medium)
B. Super Rapid (Large)
C. Griddle
Incorrectly Positioned
Correctly Positioned
24
ADJUST FLAME HEIGHT
Check and adjust the height of top burner flames. The cooktop "low" burner
flame should be a steady blue flame approximately 1/4" (6 mm) high. Propane
gas flames have a slightly yellow tip.
ig lameLow lame
If burners do not light properly:
1. Turn burner control knob to the "OFF" position.
2. Check that the cooktop is plugged in. Check that the circuit breaker has not
tripped or the household fuse has not blown.
3. Check that the gas shutoff valves are set to the "open" position.
4. Check that burner caps are properly positioned on burner bases.
To adjust standard burner:
IMPORTANT: Adjustments must be made with two other burners in operation
on a medium setting. This prevents the upper row of flames from being set too
low, resulting in the flame being extinguished when other burners are turned
on.
The flame can be adjusted using the adjustment screw in the center of the
valve stem. The valve stem is located directly behind the control knob.
1. Light the burner and turn the knob to the lowest setting (MIN).
2. Pull and remove the control knob.
3. Insert a small, flat-blade screwdriver into the adjustment screw, and slowly
turn the screw until the flame appearance is correct.
• Open the valve more if the flames are too small or fluttered.
• Close the valve more if the flames are too large.
OFF
a
Adjustment screw
MAX
4. Replace the control knob.
5. Test and check the flame by turning the control knob from the lowest to the
highest settings.
b
MIN
a
Control knob stem
b
25
NOTE: For burners (on some models) with safety valve, make sure that the
regulation obtained is sufficient to maintain heating of the thermocouple. If it
is not, increase the minimum flame.
ABNORMAL OPERATION
ANY OF THE FOLLOWING ARE CONSIDERED TO BE ANBORMAL OPERATION
AND MAY REQUIRE SERVICING:
• Yellow tipping of the hob burner flame
• Sooting up of cooking utensils.
• Burners not igniting properly.
• Burners failing to remain lit.
• Burners extinguished by oven door.
• Gas valves, which are difficult to turn.
IN CASE THE APPLIANCE FAILS TO OPERATE CORRECTLY, CONTACT THE
AUTHORIZED SERVICE PROVIDE IN YOUR AREA.
THE BURNERS REQUIRE NO REGULATION OF THE PRIMARY AIR.
26
GAS CONVERSION
WARNING
Explosion Hazard
Use a new CSA International approved gas supply line.
Install a shut-off valve.
Securely tighten all gas connections.
If connected to LP, have a qualified person make sure gas pressure does
not exceed 14" (36 cm) water column.
Examples of a qualified person include:
• licensed heating personnel,
• authorized gas company personnel, and
• authorized service personnel.
Failure to do so can result in death, explosion or fire.
LP/PROPANE GAS CONVERSION
IMPORTANT: Gas conversions must be done by a qualified service technician
in accordance with the manufacturer's instructions and all codes and
requirements of the authority having jurisdiction. The qualified agency
performing this work assumes the gas conversion responsibility.
Convert Gas Pressure Regulator
1. Turn manual shutoff valve to the closed position.
2. Unplug cooktop or disconnect power.
3. Locate the gas pressure regulator below the cooktop.
IMPORTANT: Do not remove the gas pressure regulator.
27
4. Unscrew the regulator cap with the wrench.
Regulator cap
5. Remove the retainer pin that is currently positioned for use with natural
gas.
Natural gas
position
Retainer pin
6. Turn the retainer pin upside down and place it back into the regular cap.
The regular cap is now positioned for use with LP gas.
Propane gas
position
7. Screw and tighten the regulator cap back into the gas pressure regulator
with the wrench.
Regulator cap
28
Convert Surface Burners
1. If installed, remove the burner grates.
2. Remove the burner grates, burner caps, and the burner base.
3. Remove the natural gas orifices with a 9/32" (7 mm) nut driver.
Orifice
4. Replace the natural gas orifices with the correct LP gas orifices from the LP
conversion kits. LP gas orifices are stamped with a size. Refer to the
following chart for correct LP gas orifice ratings and sizes for proper
placement.
091
Orifice size
(091 - Denotes 0.91 mm)
29
Orifice Chart for Surface Burners:
COS-GRT366
Burner Placement
Super Rapid Front Left 1.24 1.88 18,000 BTU
Rapid Front Center 1.00 1.50 12,000 BTU
Super Rapid Front Right 1.24 1.88 18,000 BTU
Semi Rapid Rear Left 0.88 1.35 9,000 BTU
Rapid Rear Center 1.00 1.50 12,000 BTU
Semi Rapid Rear Right 0.88 1.35 9,000 BTU
C B C
A B A
LP Orifice
Size (mm)
NG Orifice
Size (mm)
COS-GRT366
A. Super Rapid (Large)
B. Rapid (Medium)
C. Semi Rapid (Small)
Burner
Rating
30
COS-GRT486G
Burner Placement
LP Orifice
Size (mm)
NG Orifice
Size (mm)
Burner
Rating
Rapid Front Left 1.00 1.50 12,000 BTU
Super Rapid Front Center 1.24 1.85 18,000 BTU
Rapid Front Right 1.00 1.50 12,000 BTU
Rapid Rear Left 1.00 1.50 12,000 BTU
Rapid Rear Center 1.00 1.50 12,000 BTU
Rapid Rear Right 1.00 1.50 12,000 BTU
Griddle Center 1.16 1.70 15,000 BTU
A A A
C
COS-GRT486G
A. Rapid (Medium)
B. Super Rapid (Large)
A B A
C. Griddle
5. Keep and store natural gas orifices in case of re-installation with natural
gas.
6. Replace the burner base, the burner caps, and the burner grates.
Burner cap
Burner base
Igniter
Flame failure safety device
(for older versions)
31
Convert Griddle (On Models with Griddle)
1. Remove the screws on the back cover, and remove the back cover.
Back cover
2 . Remove the screws on the back of the orifice holder below the griddle.
Orifice
holder
3. Gently pull out the orifice holder unveiling the natural gas orifice.
Orifice
4. Use a wrench to remove the natural gas orifice and replace it with the
opriate LP orifice. (See orifice chart.) Be cautious not to bend or
appr
damage the gas line with excessive force when working with the wrench.
5. Replace the orifice holder and the back cover.
Complete Gas Conversion
1. Open shutoff valve in the gas supply line.
2. Plug in cooktop or reconnect power.
• Refer to "Gas Connection" section in the "Installation Instructions" section
for proper connection of the cooktop to the gas supply.
• Refer to "Complete Connection" section to complete this procedure.
• Refer to the "Adjust Flame Height" section for burner flame adjustments.
IMPORTANT: You may have to adjust the low setting for each cooktop
burner.
32
OVERVIEW
COOKTOP LAYOUT
This illustration covers several different models. The cooktop you have
purchased may have some or all of the items listed. The locations and
appearances of the features shown here may not match those of your model.
a
b
Griddle (on models with griddle)
a
Grate
b
Surface burner
c
Control panel
d
c
d
33
WHAT'S INCLUDED
Surface burner grates (3) Surface burners and caps (6)
Griddle kit (cover & grease tray)
Model: COS-GRT486G
BURNER LAYOUT
Burner cap
a
Burner head
b
34
a
b
c
d
Electrode
c
Flame failure safety
d
(on some models)
device
COOKTOP USE
Read the instructions before installing or using this appliance.
• This appliance shall be installed in accordance with the regulations in force
and only used in a well-ventilated space.
• The use of a gas-cooking appliance results in the production of heat and
moisture in the room in which it is installed. Ensure that the kitchen is well
ventilated: keep natural ventilation holes open or install a mechanical
ventilation device (mechanical extractor hood).
• Prolonged intensive use of the appliance may call for additional
ventilation, for example opening of a window, or more effective ventilation,
for example increasing the level of mechanical ventilation where present.
• Burners should be operated only when covered by cookware. Burner flames
not covered by cookware present a risk of fire or clothing ignition.
• Never let flames extend beyond the sides of the cookware. Failure to
comply may result in serious injury.
• Always turn off the surface burners before removing cookware. All surface
burners should be turned off when you are not cooking.
• When removing hot cookware from the burner, be sure to lift it high
enough to not come in contact with the control knobs. Hot cookware
coming into contact with the control knobs could cause damage, such as
melting or warping.
• If you smell gas, turn off the gas to the cooktop and call a qualified service
technician. NEVER use an open flame to locate a leak.
• Do not operate the burner for an extended period of time without
cookware on the grate. The finish on the grate may discolor or chip without
cookware to absorb the heat.
• Do not attempt to disassemble any burner while another burner is on.
Damage to the product may occur.
• Be sure the burners and grates are cool before you place your hand, a pot
holder, or cleaning materials on them.
35
USING THE COOKTOP BURNERS
IMPORTANT: Make sure all cooktop burners are properly installed.
1. To ignite a burner, push down on the burner control knob and turn it to the
ignite position.
2. After the cooktop burner lights, release and turn the control knob between
Hi and Low to adjust the flame level.
NOTE: For models with a flame failure safety device - Once the flame is lit,
hold the control knob depressed for about 3-4 seconds until the device
keeps the burner automatically lit. If the burner fails to ignite, wait one
minute for the gas to dissipate before attempting to reignite.
3. To turn off the burner, turn the control knob to the OFF position.
POWER FAILURE
In case of prolonged power failure, the surface burners can be lit manually
with a match. Using extreme caution, hold a lit match near the ports beneath
the surface burner cap, then push down on the burner control knob and
slowly turn it to the ignite position. Once lit, release and turn the control knob
to adjust the flame level, and surface burner will continue to operate
normally.
NOTES:
In the case of unintentional flame extinguishing, the safety valve intervenes
by shutting off the gas to the burners.
The electric igniter must not be actuated for longer than 15 seconds. Should
the burner not light, or should the burner be unintentionally turned off,
immediately close the burner, and wait at least 1 minute before repeating.
Once ignited, adjust the flame as desired.
For lower gas consumption and a better result, use saucepans with a
diameter matching the diameter of the burner, to avoid the flame coming up
around the sides of the saucepan. See the Container Table. Use only flatbottomed pans.
As soon as liquid starts to boil, turn the flame down to a level sufficient to
maintain boiling.
36
USING THE GRIDDLE (ON MODELS WITH GRIDDLE)
When using the griddle for the first time, clean the griddle thoroughly with
warm and soapy water to remove duct or any manufacturing protective oil,
then rinse with clean water and wipe off to dry with soft, clean and lint-free
cloth.
IMPORTANT: The griddle cover must be removed before turning on the
griddle, and it should be equipped when the griddle is not in use.
1. Remove the griddle cover.
Note: Be caution as the griddle cover may be hot if the surface burners
next to the griddle have just been used.
2. Verify the grease tray is properly positioned under the front edge of the
griddle.
3. Push and turn the griddle control knob to the desired cooking temperature
to preheat the griddle.
4. When the griddle has reached the desired cooking temperature, the
indicator light will turn on.
5. To turn off the griddle, turn the griddle control knob to the OFF position.
Note: The surface of the griddle is hot after use. Please allow sufficient time
for the griddle and the grease tray to cool prior to cleaning.
6. After cleaning the griddle, the grease tray, and the cooktop surface,
replace the griddle cover over the griddle.
COOKWARE
MATCH PAN DIAMETER TO FLAME SIZE
The flame should be the same size as the bottom of the pan or smaller. Do not
use small pans with high flame settings as the flames can lick up the sides of
the pan. Oversize pans that span two burners are placed front to rear, not
side to side.
USE BALANCED PANS
Pans must sit level on the cooktop grate without rocking. Center the pan over
the burner.
USE A LID THAT FITS PROPERLY
A well-fitting lid helps shorten the cooking time. Flat, heavy bottom pans
provide even heat and stability.
37
BALANCED PAN
CONCAVE
(HOLLOW)
CONVEX
(ROUNDED)
FLAME TOO LARGE
FOR PAN SIZE
USE LIDS THAT
FIT PROPERLY
CONTAINER SIZE SUGGESTION TABLE
Burner Min Saucepan Max Saucepan
Auxiliary 3.5" (9.0 cm) 6.3" (16 cm)
Semi Rapid 5.1" (13 cm) 7.1" (18 cm)
Rapid 5.9" (15 cm) 10.2" (26 cm)
Super Rapid 8.3" (21 cm) 10.2" (26 cm)
COOKTOP CARE
CLEANING
UNBALANCED
PAN
IMPORTANT: Before cleaning, make sure all controls are off and the cooktop
is cool. Always follow label instructions on cleaning products. Soap, water,
and a soft cloth or sponge are suggested first, unless otherwise noted. Do not
use abrasive cleaning products.
38
CONTROL KNOBS
• To remove the knobs, be sure the knobs are in the OFF position.
• Pull knobs straight away from control panel to remove.
Cleaning Recommendation:
• The knobs should be cleaned with soap and water.
• Do not clean knobs in the dishwasher or use abrasive cleaners or steel
wool.
• Do not remove the seals under the knobs.
BURNER GRATES
• To avoid chipping, do not bang grates against each other or hard surfaces,
such as cast iron cookware. Although the grates are durable, they will
gradually lose their shine due to exposure to high temperatures.
Cleaning Recommendation:
• Soap and Water: Use a nonabrasive plastic scrubbing pad and mildly
abrasive cleanser, soap, and water.
• Dishwasher: The grates may be cleaned in the dishwasher. Remove any
burnt-on food prior to placing the grates in the lowest rack in the
dishwasher.
BURNER CAPS
• Do not place caps in the dishwasher or reassemble wet caps on burners.
Cleaning Recommendation:
• Use a nonabrasive plastic scrubbing pad and mildly abrasive cleanser,
soap, and water.
BURNER BASE
• The holes in the burner bases must be kept clean for proper ignition and a
complete, even flame. Spillovers should be cleaned immediately since they
can clog the openings in the burners.
IMPORTANT: Before cleaning, make sure all controls are OFF and the
cooktop is cool.
Cleaning Recommendation:
• Remove the burner cap from the base. Clean the burner cap with hot soapy
water, and then rinse it.
39
• Remove the burner base and clean the gas tube opening under the base.
• Clean clogged burner ports with a straight pin, needle, or small-gauge wire
as shown. Do not use a wooden toothpick or clean in the dishwasher.
• Gently clean the igniter with a damp cloth.
GRIDDLE
• Clean the griddle shortly after removing food and the griddle has cooled.
Cleaning Recommendation:
• Hot, soapy water and/or plastic scrub pad.
• After cleaning dry surface with a paper towel.
DRIP TRAY AND AREA UNDER TRAY
• Allow cooktop to cool completely before cleaning.
Cleaning Recommendation:
• Warm, soapy water or nonabrasive cleanser.
• Damp cloth or nonabrasive pad.
• Dry completely before placing drip tray in position.
STAINLESS STEEL COOKTOP SURFACE
• Food spills containing acids, such as vinegar and tomato, should be
cleaned as soon the cooktop is cool. These spills may affect the finish.
• Do not use scouring pads, abrasive cleaners, cooktop cleaner, steel wool
pads, gritty washcloths, or abrasive paper towels.
Cleaning Recommendation:
• For best results, use a soft cloth or non-scratch sponge.
• Rub in direction of the grain to avoid damaging the surface.
• Use stainless steel or all-purpose cleaner.
PORCELAIN ENAMEL COOKTOP SURFACE (ON SOME MODELS)
Cleaning Recommendation:
• Use a nonabrasive scrubbing pad and glass cleanser or a mild liquid
cleaner.
40
TROUBLESHOOTING
First try the solutions suggested here to possibly avoid the cost of a service
call.
COOKTOP PROBLEMS
PROBLEM POSSIBLE CAUSE SOLUTION
Burner
will not
ignite
Burner
will not
operate
Burner
Flames
are
uneven,
yellow
and/ or
noisy
There is no power to
the cooktop.
Burner parts or
igniters may be wet,
dirty, or misaligned.
Gas shut-off valve is
close.
First time use. Air
still in the gas line.
Control knob is not
set correctly.
The burner port is
clogged.
Burner port(s) are
clogged.
Burner caps are not
positioned properly.
Propane gas is
being used.
Check that cooktop is properly
connected to 3- or 4-wire, 240V power
supply.
Check that the burner parts and igniter
are clean, dry, and correctly assembled.
Open the gas shut-off valve.
Turn on any one of the surface burner
knobs to release air from the gas lines.
Push in knob before turning to a
setting.
Clean burner port opening using a stiff,
nylon toothbrush or a straightened
paper clip.
Clean burner port opening using a stiff,
nylon toothbrush or a straightened
paper clip.
Place burner caps so that the alignment
pins are properly aligned with the slots.
The cooktop should be converted to LP
gas by a qualified technician.
41
PROBLEM POSSIBLE CAUSE SOLUTION
Burner
flame is
too high
or too low
Burner
makes
popping
noises
Excessive
heat
around
cookware
on
cooktop
Cooktop gas supply
is not correct.
The gas pressure is
not correct.
The burner is wet. Allow the burner to dry before using.
The burner cap or
gas spreader is not
positioned correctly.
The cookware is not
the proper size for
the burner.
Ensure the cooktop is set for the correct
gas type. It is factory set for natural
gas. If connecting to LP gas, the burners
should be converted to LP gas with the
orifice kit supplied and the pressure
regulator converted to the LP gas
setting by a qualified technician.
Make sure the pressure regulator is
installed correctly and the gas line
pressure is correct. See Installation
Instructions.
Place burner caps so that the alignment
pins are properly aligned with the slots.
Use cookware with a bottom surface
approximately the same size as the
cooking area and burner. Cookware
should not extend more than 1" (2.5 cm)
outside the cooking area. Adjust the
flame so that it does not come up
around the cookware.
Cooking
results
are not
what
expected
42
Using incorrect
cookware.
The control knob is
not set to the
proper heat level.
See the "Cookware" section.
See the "Adjust Flame Height" section.
LIMITED WARRANTY
WARRANTY AND SERVICE
TO RECEIVE WARRANTY SERVICE, YOUR PRODUCT MUST BE REGISTERED.
TO REGISTER AND REVIEW FULL WARRANTY DETAILS, VISIT:
WWW.COSMOAPPLIANCES.COM/WARRANTY
SCAN TO REGISTER
CUSTOMER SUPPORT
TO CHAT WITH US LIVE FOR ASSISTANCE, VISIT:
WWW.COSMOAPPLIANCES.COM/CHAT
SCAN TO CHAT
43
IMPORTANT
Do Not Return This Product To The Store
If you have a problem with this product, please contact COSMO Customer
Support at
+1 (888) 784-3108
DATED PROOF OF PURCHASE, MODEL #, AND SERIAL # REQUIRED FOR
WARRANTY SERVICE.
IMPORTANT
Ne pas Réexpédier ce Produit au Magasin
Pour tout problème concernant ce produit, veuillez contacter le service des
consommateurs Cosmo Customer Support au
+1 (888) 784-3108
UNE PREUVE D’ACHAT DATEE EST REQUISE POUR BENEFICIER DE LA GARANTIE.
IMPORTANTE
No regrese este producto a la tienda
Si tiene algún problema con este producto, por favor contacte el ayuda al
cliente COSMO al
+1 (888) 784-3108
(Válido solo en E.U.A.)
NECESITA UNA PRUEBA DE DE COMPRA FECHADA, NÚMERO DE MODELO Y DE
SERIE PARA EL SERVICIO DE LA GARANTÍA.
Correct Disposal of this product:
This marking indicates that this appliance should not
be disposed with other household wastes. To prevent
possible harm to the environment or human health
from uncontrolled waste disposal, recycle it responsibly
to promote the sustainable reuse of material resources.
44
MEMO
MEMO
APPLIANCES
Cosmo is constantly making efforts to improve the quality and
performance of our products, so we may make changes to our
appliances without updating this manual.
Electronic version of this manual is available at:
www.cosmoappliances.com
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