Cosmo COS-DFR304 Instruction Manual

IMPORTANT: Read and save these instructions.
NOTICE:
Installer: Leave this guide with the homeowner
Homeowner: Keep this guide for future reference
DUAL FUEL RANGE
COS-DFR304
COS-DFR366
COS-DFR486G
Installation & User Manual

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 care 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
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 it, or contact our Customer Support at:
1-888-784-3108.
2
THANK YOU FOR YOUR PURCHASE

TABLE OF CONTENTS
SAFETY & WARNINGS ..........................................................4-5
General Safety & Warnings ......................................................4
Installation Safety & Warnings .................................................5
INSTALLATION MANUAL .....................................................6-20
Legs ........................................................................................6
Anti-Tip Device .........................................................................7
Range .......................................................................................8
Range Hood .............................................................................9
Electrical Connection .............................................................10
Power Cord Replacement ......................................................11
Dimension Diagram: DFR304 ................................................12
Dimension Diagram: DFR366 .................................................13
Dimension Diagram: DFR486G ..............................................14
Circuit Diagram: DFR304 ........................................................15
Circuit Diagram: DFR366 ........................................................15
Circuit Diagram: DFR486G .....................................................16
Gas Connection ................................................................17-18
Gas Conversion ................................................................19-20
Before Use: Installation Checklist ..........................................21
Before Use: Final Preparation ................................................21
USER MANUAL ..................................................................22-42
Operation & Safety Warnings ............................................22-23
Burner / BTU Diagrams ...........................................................24
Cooktop Surface Cooking .................................................25-27
Oven Cooking ..................................................................28-38
Before Use / Tips ....................................................................28
Oven Functions .......................................................................29
Bake ........................................................................................30
Convection Bake & Turbo ..................................................31-32
Baking Recommendations .................................................33-34
Broil / Convection Broil ......................................................35-36
Broil/Roasting Recommendations ..........................................37
Care & Maintenance ................................................................38
Troubleshooting .................................................................39-41
Location of Appliance Tags ....................................................42
WARRANTY & SERVICE ....................................................43-44
3

SAFETY & WARNINGS
4
This appliance has been designed for non-
professional, domestic use only.
Do not use this appliance to heat a room.
Do not place any pot or pan on the open oven door.
The door is made of glass and it can break if loaded
with a weight.
Before beginning installation, please read these
instructions completely and carefully.
Do not remove permanently affixed labels, warnings,
or plates from the product. This may void the
warranty. Please observe all local and national codes
and ordinances.
Please ensure the range is properly grounded.
The installer should leave these instructions with the
consumer who should retain for local inspector's use
and for future reference.
The plug should always be accessible.
Installation must conform with local codes or in the
absence of codes, the National Fuel Gas Code
NSIZ223.1/NFPA54. Electrical installation must be in
accordance with the National Electrical Code, ANSI/
NPA70 - latest edition and/or local codes. IN
CANADA: Installation must be in accordance with the
current CAN/CGA-fe 149.1 National Gas Installation
Code or CAN/CGA-B 149.2, Propane Installation
Code and/or local codes. Electrical installation must
be in accordance with the current CSA C22.1
Canadian Electrical Codes Part 1 and/or local codes.
Installation of any gas-fired equipment should be
made by a licensed plumber. A manual gas shut-off
valve must be installed in the gas supply line ahead of
the oven in the gas flow for safety and ease of
service.
WARNING: This appliance shall not be
installed with a ventilation system that blows
air downward toward the range; this type of
ventilation system may cause ignition and
combustion problem with the gas appliance
resulting in a personal injury or unintended
operation.
WARNING: An air curtain or other overhead
range/cooktop hood, which operates by
blowing a downward airflow onto a range/
rangetop/cooktop, shall not be used/installed
in conjunction with this gas range.
the gas flow for safety and ease of service.
WARNING: This appliance shall not be
installed with a ventilation system that blows
air downward toward the range; this type of
ventilation system may cause ignition and
combustion problem with the gas appliance
resulting in a personal injury or unintended
operation.
WARNING: An air curtain or other overhead
range/cooktop hood, which operates by
blowing a downward airflow onto a range/
rangetop/cooktop, shall not be used/installed
in conjunction with this gas range.
PLEASE READ AND FOLLOW THESE
IMPORTANT INSTRUCTIONS FOR THE SAFETY
OF YOUR HOME AND OF THE PEOPLE LIVING
IN IT.
Save this Manual for local electrical inspector's use.
Read and save these instructions for future
reference. Observe all governing codes, ordinances
and regulations. Installation and service must be
performed by a qualified installer, service agency or
the gas supplier.
WARNING: If the information in this manual
is not followed exactly, a fire or explosion
may result causing property damage,
personal injury, or death.
WARNING: Do not store or use gasoline or
other flammable substances in the vicinity
of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
•Do not light any appliance.
•Do not touch any electrical switch.
•Do not use any phone in your building.
•Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions closely.
•If you cannot reach your gas suppliers, call the
fire department.
In Massachusetts: All gas products must be installed
by a "Massachusetts" licensed plumber or gasfitter.
A "T" handle type manual gas valve must be
installed in the gas line connected to this appliance.
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.
WARNING: This range can tip over, causing
possible injury or death. Install the anti-tip
device shipped with the range. See Page 7
of this manual.
WARNING: Read this instruction booklet
before installing and using the appliance.
The manufacturer will not be responsible for
any damage to property or to persons
caused by incorrect installation or improper
use of the appliance. The manufacturer
reserves the right to make changes to its
products when considered necessary and
useful, without affecting the essential safety
and operating characteristics.

INSTALLATION SAFETY & WARNINGS
5
WARNING! Do not use aerosol sprays in
the vicinity of this appliance while
it is in operation.
ROOM VENTILATION
An exhaust fan may be used with the appliance;
in each case it shall be installed in conformity
with the appropriate national and local standards.
Exhaust hood operation may affect other vented
appliances; in each case it shall be installed in
conformity with the appropriate national and local
standards.
TYPE OF GAS
This appliance is shipped from the factory for use
with natural gas. Propane Conversion Kit must
be purchased separately. For use with propane
LP gas please follow the conversion procedure
described on pg. 17.
GAS PRESSURE
The maximum inlet gas supply pressure
incoming to the gas appliance pressure regulator
is 34 PSI (13,8 w.c. pr 3,5 kPa).
The minimum gas supply pressure for checking
the regulator setting shall be at least 1" w.c. (249
Pa) above the inlet specified manifold pressure
to the appliance (this operating pressure is 4"
w.c. (1.00 kPa) for Natural Gas and 11" w.c.
(2.75 kPa for LP Gas).
This appliance shall only be installed by an
authorized professional.
This appliance shall be installed in
accordance with the manufacturer's
installation instructions.
This appliance must be installed in accordance
with the standards of the country where it will
be installed. The installation of this appliance
must conform to local codes and ordinances. In
the absence of local codes, Installations must
conforms to American National Standards,
National Fuel Gas Code ANSI Z223.1 - latest
edition/NFPA 54 or B 149.1.
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.
If local codes permit, a flexible metal appliance
connection with the new AGA or CGA certified
design, max. 5 feet (1,5 m) long, 3/4" I.D. is
recommended for connecting this appliance to
the gas supply line. Do not bend or damage the
flexible connector when moving the appliance.
This appliance must be used with the pressure
regulator provided. The regulator shall be
properly installed in order to be accessible
when the appliance is installed in its final
location. The pressure regulator must be set for
the type of gas to be used. The pressure
regulator has 3/4" female pipe thread. The
appropriate fitting must be determined based
on the size of your gas supply line, the flexible
metal connector and the shutoff valve.
The appliance 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 34 PSI (13,8
w.c. pr 3,5 kPa).
All opening and holes in the wall and floor, back
and under the appliance shall be sealed before
installation of the appliance.
A manual valve shall be installed in an
accessible location in the gas line external to
the appliance for the purpose of turning on or
shutting off gas to the appliance

6
INSTALLATION: LEGS
The ranges must only be used with the legs properly installed.
Before installing the legs, position the appliance near its final location as the
legs are not suitable for moving the appliance over long distances.
Four height-adjustable legs are shipped with the range in the polystyrene
container situated over the appliance.
After unpacking the range, raise it enough
to insert the legs in the appropriate receptacles situated on the lower part of
the appliance. Lower the range gently to keep any undue strain from legs
and mounting hardware. If possible use a pallet or lift jack instead of tilting
the unit.
Adjust leg height to the desired level by twisting the inside portion of the leg
assembly until the proper height is reached. Check with a level device
to ensure the cooktop is perfectly level.

7
1.) The anti-tip bracket shipped with the range must be properly secured to the rear wall as
shown in the picture below. The height of the bracket from the floor must be determined after
the range legs have been adjusted to the desired height and after the range has been leveled.
Measure the distance from the floor to the bottom of the anti-tip bracket receptacle on the
back of the appliance. Position the two anti-tip brackets on the wall at the desired height plus
1/8" (0.32 cm). The brackets must be placed at 2 - 5/16" (6.0 cm) from each side of the range.
The distance between the two bracket is 25 - 1/4" (64.1 cm). Secure the brackets to the wall
with appropriate hardware. Slide the range against the wall until the brackets are fully inserted
into their receptacles on the back of the range.
Check to see that the Anti-Tip device is installed properly. Grasp the top rear edge of the
range and carefully attempt to tilt it forward. Verify that the Anti-Tip device is engaged.
2.) Or, use the anti-tip chain, and tighten up with fixed screw on the wall, and when the wall
not suitable for installation, the chain shall be fixed to the cabinet structure.
INSTALLATION: ANTI-TIP DEVICE

8
INSTALLATION: RANGE
E
.
G
ELECTRICAL REQUIREMENTS
A properly grounded and electrical
receptacle Type NEMA 14-50R should
be installed; refer to ELECTRICAL
CONNECTION section Page 10.
Check all local code requirements.
GAS REQUIREMENTS
An agency-approved, properly-sized
manual shut-off valve should be installed
no higher than 3" (7.6 cm) above the
floor and no less than 2" (5 cm) and no
more than 8" (20.3 cm) from the right
side (facing product).
To connect gas between shut-off valve
and regulator, use agency-approved,
properly sized flexible or rigid pipe.
Check all local code requirements.
INSTALLATION ADJACENT TO KITCHEN
CABINETS
This range may be installed directly adjacent to
existing countertop high cabinets (36" or 91.5 cm
from the floor). For the best look, the worktop
should be level with the cabinet countertop. This
can be accomplished by raising the unit using the
adjustment spindles on the legs.
ATTENTION: The range CANNOT be installed
directly adjacent to kitchen walls, tall cabinets, tall
appliances, or other vertical surfaces above 36"
(91.4 cm) high. The minimum side clearance in
such cases is 6" (15.2 cm).
Wall cabinets with minimum side clearance must be
installed 30" above the countertop with countertop
height between 35 1/2" (90.2 cm) and 37 1/4" (94.6
cm). The maximum depth of wall cabinets above
the range shall be 13" (33.0 cm).
E
.
G
COOKING RANGE WIDTH
30" Model 30"(757)
36" Model 36"(910)
48" Model 48"(1215)
3 23"(82)
FRONT VIEW
30"
(762)
6"
(152)
(65)
(930)
TOCOOKING
SURFACE
W
OPENING WIDTH
30" (762) TO 36"
(914) TO BOTTOM OF
VENTILATION HOOD*
E
LOCATION OF GAS AND
ELECTRICAL EXTENDS
ON FLOOR
SIDE VIEW
.
13"
(330)
3 15"
(80)
.
12"
(305) GAS
5"
(127)
2"
(51)
G
53/4
"
(146)
(250)
93/4"
363/5"
23/5"

9
To eliminate the risk of burns or fire by reaching over heated surface units, cabinet storage
space located above the surface units should be avoided. If cabinet storage is to be provided,
the risk can be reduced by installing a range hood. These hoods have been designed to work
in conjunction with the range and have the same finish for a perfect look.
For maximum performance, the height of the bottom of the hood from the worktop should be
between 30" (76.2 cm) and 36" (91.4 cm). This would typically result in the bottom of the
hood being 61 1/2" (156.2 cm) to 67 1/2" (171.5 cm) above the floor. These measurements
provide for safe and efficient operation of the hood.
Before installation of the exhaust hood, consult local or regional building and installation
codes for additional specific clearance requirements.
Refer to the range hood installation instructions provided by the manufacturer for additional
information.
INSTALLATION: RANGE HOOD

10
Rating Label
The appliance shall be connected to a single
phase electric line rated at 120 208Vac or 120/
240Vac and 60Hz frequency.
ELECTRIC POWER RATING
• 120/208Vac: 10 A max
• 120/240Vac: 12 A max
HEATING ELEMENTS POWER RATING
• Oven bake element = 1500 Watt
• Oven circular element = 3200 Watt
• Oven broil element = 2850 Watt
Install a suitable electric power supply
receptacle connection type NEMA 14-50R able
to support a load of at least 30 A (per line)
according to local code requirements. For four
wires power supply connection system see
diagram below.
Check your local code for which of the options
below should be used in grounding the
receptacle power suppliy connections.
FOUR WIRES CONNECTION
• Connect the L1 receptacle terminal to the
incoming BLACK electrical supply wire(L1-hot
wire)
• Connect the L2 receptacle terminal to the
incoming RED electrical supply wire (L2-hot
wire)
• Connect the NEUTRAL receptacle terminal to
the incoming NEUTRAL (WHITE) electrical
supply wire
• Connect the GROUND receptacle terminal to
the incoming GROUND (GREEN) electrical
supply wire
ELECTRICAL GROUNDING
This appliance is equipped with a four-
prong plug for your protection against
shock hazard and should be plugged
directly into a properly grounded
receptacle, do not cut or remove the
prong from this plug.
WARNING
ELECTRICAL SHOCK HAZARD
Disconnect electrical power at the
circuit breaker box or fuse box before
installing the appliance. Provide
appropriate ground for the appliance.
Use copper conductors only. Failure to
follow these instructions could result
in serious injury or death.
DO NOT USE EXTENSION CORDS
WITH THIS APPLIANCE AS IT MAY
RESULT IN FIRE, ELECTRIC SHOCK
OR OTHER TYPE OF PERSONAL
INJURY.
Label all wires prior to disconnecting
when servicing controls. Wiring errors
can cause improper and dangerous
operation. Verify proper operation after
servicing.
When working with electrical
connection, please refer to the rating
label, the rating label is located near the
entrance of power supply cord.
ELECTRICAL CONNECTION

11
POWER CORD REPLACEMENT
DO NOT USE EXTENSION
CORDS WITH THIS APPLIANCE
AS IT MAY RESULT IN FIRE,
ELECTRIC SHOCK OR OTHER
TYPE OF PERSONAL INJURY.
The appliance is equipped at
the factory with an electric
supply cord set 4 wires type
with ring terminals (L1, L2, N,
Ground) suitable for range use
UL/CSA listed type SRDT/DRT
2x6AWG (L1, L2)+2x8AWG (N,
G) rated 300V, 40 or 50A with
fused plug type NEMA 14-50P;
cable length 1.5m in case the
supply cord set must be replaced,
it must be replaced with an
identical set having the save
technical specifications and
installed using the following
directions:
1.) Disconnect appliance from
electrical power supply receptacle
2.) Slide out the appliance from
the installation place to access
the back enclosure
3.) Remove back enclosure panel
by removing the 6 screws as
shown below.
4.) Loose strain relief
by unscrewing two
strain relief's screws in
diagram
5.) Remove damaged
supply cord set by taking off
the 4 electrical connection
screws (block L1, N, L2 and
Ground screw, see
diagram)
6.) Insert the new supply
cord set in the strain relief
and lock it with two strain
relief’s screws in suitable
position
7.) Fix well the ring
terminals G, L1, N, L2 of
the new supply cord set, as
shown in diagram with its 4
screws
8.) Reinstall the back
enclosure panel with 6
screws
9.) Slide the appliance back
into its proper location
10.) Reconnect the
appliance to the electrical
power

12
DIMENSION DIAGRAM: DFR304

13
DIMENSION DIAGRAM: DFR366

14
DIMENSION DIAGRAM: DFR486G

15
CIRCUIT DIAGRAMS
DFR304
DFR366

16
CIRCUIT DIAGRAMS
DFR486G

17
GAS CONNECTION
All gas connections must comply with
national and local codes. The gas supply line
(service) must be the same size or greater
than the inlet line of the appliance. This
range uses a 1/2" NPT inlet (see drawing
below for details of gas connection). On all
pipe joints use appropriate sealant resistant
to gas.
This range can be used with Natural or LP/
Propane gas. The range is shipped from the
factory for use with natural gas.
For LP/propane household installation, the
appliance must be converted by the dealer,
by a factory-trained professional or by a
qualified licensed plumber or gas service
company.
Gas conversion is important for safe and
effective use of the appliance. It is the
responsibility of the dealer and the owner of
the range to perform the appropriate gas
conversion following the directions of the
manufacturer.
THE PROPER GAS CONVERSION
PROCEDURE IS DESCRIBED IN THIS
MANUAL. REPLACEMENT NOZZLES
CAN BE PURCHASED FROM
COSMOAPPLIANCES.COM.
Please provide the service person with this
manual before work is started on the range.
WARNING: DO NOT USE AN OPEN
FLAME WHEN CHECKING FOR LEAKS.
Leak testing of the appliance shall be
conducted according to the manufacturer's
instructions. Before placing the oven into
operation, always check for leaks with soapy
water solution or other acceptable method.
Check for gas leakage with soapy water
solution or other acceptable methods in all
gas connections installed between inlet gas
pipe of the appliance, gas regulator, till to the
manual shut-off valve.
MANUAL SHUT-OFF VALVE
THIS VALVE IS NOT SHIPPED WITH THE
APPLIANCE AND MUST BE SUPPLIED BY THE
INSTALLER.
The manual shut-off valve must be installed in the
gas service line between the gas hook-up on the
wall and the appliance inlet, in a position where it
can be reached quickly in the event of an
emergency.
In Massachusetts: A T handle type manual gas
valve must be installed in the gas supply line to
this appliance.
FLEXIBLE CONNECTIONS
In case of installation with flexible couplings and/
or quick-disconnect fittings, the installer must use
a heavy-duty, AGA design-certified commercial
flexible connector of at least 1/2" (1.3 cm) ID NPT
(with suitable strain reliefs) in compliance with
ANSI Z21.41 and Z21.69 standards.
In Massachusetts: The unit must be installed
with a 36" (3-foot) long flexible gas connector.
In Canada: use CAN 1-6.10-88 metal connectors
for gas appliances and CAN 1-6.9 M79 quick
disconnect device for use with gas fuel.
PRESSURE TEST-POINT STOPPER VALVE
To avoid gas leaks, the pressure test-point
stopper valve and gasket supplied with the range
must be installed on the gas fitting at the back of
the range according to the diagram below.

18
GAS CONNECTION
PRESSURE REGULATOR
Since service pressure may fluctuate with local demand, every gas cooking appliance must
be equipped with a pressure regulator on the incoming service line for safe and efficient
operation.
The pressure regulator shipped with the appliance has two female threads 34" NPT. The
regulator shall be installed properly in order to be accessible when the appliance is installed
in its final position.
Manifold pressure should be checked with a manometer and comply with the values
indicated below:
•Natural Gas: 4.0" W.c.P.
•LP / Propane: 10.0" W.C.P
Incoming line pressure upstream from the regulator must be 1" W.c.P. higher than the
manifold pressure in order to check the regulator.
The regulator used on this range can withstand a maximum input pressure of 1/2 PSI (13.8"
w.c. or 3,5 kPa) If the line pressure exceeds that amount, a step-down regulator is required.
The appliance, its individual shut-off valve, and the pressure regulator must be disconnected
from the gas line during any pressure testing of that system at pressures in excess of 1/2 PSI
(13.8" w.c. or 3,5 kPa).
The individual manual shut-off valve must be in the OFF position during any pressure testing
of the gas supply piping system at test pressures equal to or less than 1/2 PSI (13.8" w.c. or
3,5 kPa).
APPLIANCE SERVING
Before carrying any service, disconnect the appliance from gas appliance from final install
have access to the appliance for proper servicing intervention.

19
GAS CONVERSION
Gas conversion shall be conducted by a trained professional. Call customer service to identify
a trained professional near your home. The gas conversion procedure for this range includes 3
steps:
1.) Pressure regulator
2.) Surface burners
3.) Adjustment of minimum setting
The conversion is not completed if all 3 steps have not been concluded properly.
The replacement nozzles are sold separately and can be purchased from
cosmoappliances.com. Before performing gas conversion, obtain the proper nozzle for your
range.
STEP 1: PRESSURE REGULATOR
The pressure regulator supplied with the appliance is a convertible type pressure regulator for
use with Natural Gas at a nominal outlet pressure of 4" w.c. or LP gas at a nominal outlet
pressure of 11" w.c. and it is pre-arranged from the factory to operate with one of these gas /
pressure as indicated in the labels affixed on the appliance, package and Instruction booklet.
To convert the regulator for use with other liquid propane LP gas:
1.) Unscrew by hand the upper cap of the regulator, remove the silver plastic attachment from
the cap, reverse its direction and screw it again firmly against the cap. Once reversed, the
spring should be facing out, as shown below.
2.) Screw by hand the metal cap in the original position on the regulator
WARNING! Before carrying out this operation,
disconnect the appliance from gas and electricity.
LP GAS
POSITION

20
·When use a wok ,make sure you hold the handle of a wok or a small one-handled pot while
STEP 2: SURFACE BURNERS
To replace the nozzles of the surface burners, lift up the burners and unscrew the nozzles
shipped with the range using a 7mm socket wrench.
Replace nozzles using the conversion kit. Contact Cosmo Customer Service at 1-888-784-
3108, or go to www.cosmoappliances.com to purchase a conversion kit. Each nozzle has a
number indicating its flow diameter printed on the body.
STEP 3: ADJUSTMENT OF MINIMUM FLAME SETTING
WARNING: These adjustments should be made only for use of the appliance with
natural gas. For use with liquid propane gas, the choke screw must be fully turned in a
clockwise direction.
SURFACE BURNERS
1.) Light one burner at a time and set the to the MINIMUM position(small flame).
2.) Remove the knob.
3.) The range is equipped with a safety valve. Using a small-size slotted screwdriver, locate
the choke valve on the valve body and turn the choke screw to the right or left until the burner
flame is adjusted to desired minimum.
4.) Make sure that the flame does not go out when switching quickly from the MAXIMUM to the
MINIMUM position.
GAS CONVERSION