Cosmo COS-GRT366 Instruction Manual

Rev.22.05
GAS COOKTOP
COS-GRT366
COS-GRT486G
INSTALLATION & USER MANUAL
READ AND SAVE THESE INSTRUCTIONS.
FOR RESIDENTIAL USE ONLY.
PLEASE LEAVE THIS GUIDE WITH THE HOMEOWNER.
PLEASE KEEP THIS GUIDE FOR FUTURE REFERENCE.
IMPORTANT:
INSTALLER:
HOMEOWNER:
GRT SLIDE-IN COOKTOP SERIES

1
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

2
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

3
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
COOKTOP SAFETY

4
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.
DANGER
WARNING
You can be killed or seriously
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.
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.
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:

5
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.

6
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 range-
top service without breaking due
to the sudden change in
temperature.
READ AND SAVE THESE INSTRUCTIONS

7
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 hold-
down 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

8
IMPORTANT SAFETY
INSTRUCTIONS
•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
•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 shut-
off valve and how to turn it off if
necessary.

9
Back panel rubber pads (2) Adjustable feet (4)
(Pre-installed)
Gas pressure regulator
(Pre-installed)
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

Parts Needed
Gas supply line kit
(supply line and 2 adapters)
Scan to find
available LP kits
10
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

11
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.

12
PRODUCT DIMENSIONS
Note: Cooktop features may differ.
COS-GRT366
COS-GRT486G
(2.0 cm)
0.8"
(68.5 cm)
27.0"
(61.0 cm)
24.0"
(17.4
6.9"
cm)
(69.5 cm)
27.4"
25.8"
(65.4 cm)
8.7"
(22.0 cm)
8.7"
(22.0 cm)
6.9"
(17.4 cm)
3.0"
(7.6 cm)
(69.5 cm)
27.4"
25.8"
(65.4 cm)
(61.0 cm)
24.0"
(121.6 cm)
47.9"
6.9"
(17.4 cm)
(22.0 cm)
8.7"
(69.5 cm)
27.4"
25.8"
(65.4 cm)
0.8"
(2.0 cm)
(61.0 cm)
24.0"
(7.6 cm)
3.0"
0.8"
(2.0 cm)(68.6 cm)
27.0"
(61.0 cm)
24.0"
6.9"
(17.4 cm)
(69.5 cm)
27.4"
25.8"
(65.4 cm)
8.7"
(22.0 cm)
36.0"
(91.4 cm)
0.8"
(2.0 cm)

13
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 in
(33 cm)
Maximum
Overhead
Cabinet
Depth
6 in
(15.2 cm)
to right
wall
A
30 in
(76.2 cm)
6 in
(15.2 cm)
to left
wall
18 in
(45.7 cm)
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)
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.

14
B
E
FC
G
A
Note:
•A minimum clearance of ¾" (19 mm) from the back of cabinet cutout to gas
opening cutout is recommended.
•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.
D
MODEL A B C D E F G
COS-GRT366 36 1/8"
(91.8 cm) 24"
(61.0 cm)
6 7/8"
(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)
COS-GRT486G 48"
(122 cm)

15
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 time-
delay fuse or circuit breaker is also recommended. It is recommended that a
separate circuit serving only this cooktop is provided.

16
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
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.
WARNING

17
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.

18
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:
Contact local gas supplier if you are not sure about the inlet pressure.
Burner Input Requirements
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).
ab c a
b
c
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.
TYPE OF GAS MINIMUM PRESSURE MAXIMUM PRESSURE
Natural gas 4" WCP 5" WCP
LP gas 10" WCP 12" WCP
Gas supply line
Shutoff valve "open" position
To cooktop