COZY VC201C User manual

GAS-FIRED VENTED
ROOM HEATER
Installation and Operating Instructions
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Rev. 05/02/17
Specications ...................................... 2
Introduction ......................................... 3
Venting ............................................ 3 - 4
Gas Supply........................................... 5
Location &
Special Precautions ............................. 5
Combustion
& Ventilation Air ................................... 6
Clearances .......................................... 7
Draft Diverter ....................................... 7
Pilot Adjustment ................................... 8
Burner Orice & Orice Chart .............. 9
Proper Burner Flame ........................... 9
Maintenance ...................................... 10
Lighting Instructions ........................... 11
Trouble Shooting Chart .............. 12 - 13
Blower Instructions ............................ 14
TSK Wall Stat Kit ............................... 15
Parts List
and Diagrams ............................. 16 - 18
Warranty ............................................ 19
Especicaciones .................................. 2
Introducción ......................................... 3
Ventilación ...................................... 3 - 4
Suministro de gas ................................ 5
Ubicación y
Precauciones Especiales .................... 5
Combustión
y Ventilación Aire ................................. 6
Liquidaciones ....................................... 7
Desviador de borrador ......................... 7
Ajuste del piloto ................................... 8
Oricio del quemador y oricio Gráco 9
Llama apropiada del quemador ........... 9
Mantenimiento ................................... 10
Instrucciones de iluminación ............. 11
Tabla de problemas .................... 12 - 13
Instrucciones para el ventilador ......... 14
TSK Wall Stat Kit ............................... 15
Lista de piezas y
diagramas ................................... 16 - 18
Garantía ............................................. 19
Spécications ...................................... 2
Introduction .......................................... 3
Ventilation ....................................... 3 - 4
Alimentation En Gaz ............................ 5
Emplacement Et
Précautions Spéciales ......................... 5
Air De Combustion Et
De Ventilation ...................................... 6
Dégagements ...................................... 7
Hotte De Tirage ................................... 7
Réglage De La Veilleuse ..................... 8
Orice Du Brûleur Et Tablea U Orice . 9
Flamme Appropriée Du Brûleur ........... 9
Entretien ............................................ 10
Instructions D’ Allumage .................... 11
Tableau De Dépannage .............. 12 - 13
Instructions Sur Le Soufeur ............. 14
Kit De Thermostat Mural Tsk ............. 15
Liste des Pièces
et Diagrammes ........................... 16 - 18
Garantie ............................................. 19

1017480-APage 1
This unit is for residential use only and is not
approved for installation in mobile homes,
greenhouses, or environments involving
dusty,wet,corrosive, or explosive conditions.
Such conditions will invalidate the warranty
and may create unsafe conditions.
Installation, maintenance, service, troubleshooting and
repairs must be performed by a qualied service agency.
MR./MRS. HOMEOWNER, DO NOT attempt any of
these procedures yourself as this could expose you to
property damage, personal injury, or loss of life and will
invalidate all warranties.
THIS UNIT IS NOT TO BE INSTALLED IN MOBILE HOMES.
GAS-FIRED VENTED
ROOM HEATER
Installation and Operating Instructions
WARNING - If the information in these instructions
are not followed exactly, a re or explosion may result
causing property damage, personal injury or death.
Do not store or use gasoline or other ammable 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.
• 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 re department.
- INSTALLATION AND SERVICE MUST BE PERFORMED
BY A QUALIFIED INSTALLER, SERVICE AGENCY OR THE
GAS SUPPLIER.
This appliance is equipped with a safety control system designed to
protect against improper venting of combustion products.
The coating selected to provide longer
life to the heat exchanger may smoke
slightly upon initial ring. Provide adequate
ventilation if this occurs.
INSTALLER:
Leave this manual with the appliance.
CONSUMER:
Retain this manual for future reference.
Natural Gas - VC201C, VC351C, VC501C
WARNING - Operation of this heater when not connected to a properly installed and
maintained venting system or tampering with the vent safety shut-off system can result in
Carbon Monoxide (CO) poisoning and possible death.
Rev. 05/02/17

1017480-A Page 2
CONTENTS
READ CAREFULLY BEFORE INSTALLING UNIT
These installation instructions are a general guide and do not supersede applicable local codes and ordinances. Before
planning or making the installation be sure it complies with all phases of the local heating code. (Or, in the absence of
local codes, with the latest edition of National Fuel Gas Code, ANSI.Z223.1, or CAN1-B149).
The appliance, when installed, must be electrically grounded in accordance with local codes, or in the absence of local
codes, with the latest edition of National Electrical Code ANSI / NFPA 70, or Canadian Electrical Code CSA-C22.1.
All of the ANSI and NFPA standards referred to in these installation instructions are the ones that were applicable at the
time the design of this appliance was certified.
ANSI Standards:
AMERICAN GAS
ASSOCIATION
400 North Capitol St., NW
Suite 450
Washington, DC 20001
NFPA Standards:
NATIONAL FIRE
PROTECTION ASSOCIATION
1 Batterymarch Park
Quincy, Massachusetts
USA 02169-7471
Canadian Standards:
INTERNATIONAL
APPROVAL SERVICES
178 Rexdale Boulevard,
Toronto, Ontario
Canada M9W 1R3
The design of this appliance was certified to comply with the latest edition of ANSI Z21.86 and CSA 2.32.
Installer must leave these instructions with the consumer, have them complete, and return the warranty card.
ROOM HEATER SPECIFICATIONS
Your room heater comes packed in a single carton. Before installation, check the rating plate to verify that the Model
Number is correct and that the room heater is equipped for the type gas you intend to use.
SPECIFICATIONS:
Specications ............................................................ 2
Introduction .............................................................. 3
Venting .................................................................. 3 -4
Gas Supply ................................................................ 5
Location & Special Precautions ................................. 5
Combustion & Ventilation Air ..................................... 6
Clearances ................................................................ 7
Draft Diverter ............................................................. 7
Pilot Adjustment ........................................................ 8
Burner Orice & Orice Chart .................................... 9
Proper Burner Flame ................................................. 9
Maintenance ........................................................... 10
Lighting Instructions ................................................ 11
Trouble Shooting Chart ..................................... 12 -13
Blower Instructions .................................................. 14
TSK Wall Stat Kit ..................................................... 15
Parts List and Diagrams .................................... 16 -18
Warranty ................................................................. 19
The State of Massachusetts requires that
installation and service of a gas appliance be
performed by a plumber or gas tter licensed in
the Commonwealth of Massachusetts.
TYPE CONTROL GAS MODEL NUMBERS
Closed Front Thermostat Bulb Natural VC201C VC351C VC501C
Height 20” 26” 26”
Width 24” 30” 30”
Depth 15-1/4” 15-1/4” 19-1/4”
Input (BTU / HR) 20,000 35,000 50,000
Gas Inlet / Outlet Size 1/2 x 3/8” 1/2 x 3/8” 1/2 x 3/8”
Vent Size 3” 4” 4”
Center of Vent Floor 16-1/2” 21-1/2” 21-1/2”
Approximate Shipping Weight 59 lbs 85 lbs 102 lbs
Optional Blower Model N / A CHB-3 CHB-3

1017480-APage 3
THIS IS A GAS-FIRED, GRAVITY VENTED ROOM HEATER THAT WILL OPERATE SAFELY AND PROVIDE AN EFFICIENT
SOURCE OF HEAT WHEN INSTALLED, OPERATED AND MAINTAINED AS RECOMMENDED IN THESE INSTALLATION AND
OPERATING INSTRUCTIONS. READ THESE INSTRUCTIONS THOROUGHLY BEFORE INSTALLING, SERVICING, OR USING
THIS APPLIANCE. IF YOU DO NOT UNDERSTAND ANY PART OF THESE INSTRUCTIONS, CONSULT LOCAL AUTHORITIES,
OTHER QUALIFIED INSTALLERS, SERVICE TECHNICIAN, THE GAS SUPPLIER, OR THE MANUFACTURER.
VENTING
This heater must be connected to a properly installed and maintained venting system. This heater is equipped with a manual
reset vent safety shut-off device. Pilot burner outage will occur if the heater is not connected to a vent system. Pilot burner outage
may occur due to restriction or blockage in the vent or if connected to a masonry chimney having an area greater than the vent
size shown on Page 2. This appliance should be vented through a properly sized listed type B vent that has been constructed in
accordance with the National Building Code. If a horizontal section of vent is used, it must slope upwards a minimum of ¼ inch
per foot of length.
This heater must not be connected to a vent system being used for wood or coal burning appliances. The use of more than one
appliance per vent system will most likely cause the vent safety shut-off device to shut off the heater due to the cooling of vent
temperatures through the draft diverter of the second appliance. In some situations, the vent safety shut-off may shut down the
heater if a large, unlined, masonry chimney is used. Due to low vent temperatures associated with more efcient heaters it may
take too long to get the vent action going in a chimney before the shut-off device will shut down the heater. If this is the case, we
recommend lining the chimney with the proper size type B vent pipe or type B chimney liner.
WARNING: Do NOT bypass the vent safety shutoff switch. To do so could expose
the consumer to property damage, personal injury or possible death.
The switch, when activated, will extinguish the burner ame. If the homeowner experiences this problem, the vent system must
be checked and corrected.
NOTE: An existing vent that has worked for years may not be adequate for todays design because of higher efciency
requirements resulting in lower stack temperatures. The following is a list of possible causes and corrective actions.
INTRODUCTION
1. Blockage in
Vent Pipe
2. Burner is
Over Firing
4. Loose Connections
on the Vent Safety
Wiring Harness
3. Improper Vent System
A. Vent Too Short
B. Restriction in
Vent System
Caused by
Offsets
C. Incorrect Vent Pipe
POSSIBLE CAUSES CORRECTIVE ACTION
1. A) Check vent pipe for blockage, such as bird nest, wasp nest, twigs, leaves, etc.
B) Check that the vent cap is properly installed, not shoved too far down on the vent pipe.
4. Check the connection on both the switch and the gas valve. Tighten if necessary.
2. A) Check the manifold pressure.
B) Check the rate NOTE: This appliance was oriced for elevations up to 2,000 feet. When
installed at higher elevations refer to orice chart (on page 9) in main burner
orice section of instructions for proper orice size and re-orice accordingly.
3. Correct Vent System
A) The vent should not terminate less than 5 feet above the drafthood connection. A gas vent
extending through an exterior wall shall not terminate adjacent to the wall or below eaves or
parapets. Also, the top of the vent must be at least 2 feet above all obstacles within a 10 feet
radius, including the roof. See Figure A (on page 4).
B) All type “B” vent shall extend in a generally vertical direction with offsets not exceeding 45
degrees, except that a vent system having not more than one 60 degree offset may be
allowed. Any angle greater than 45 degrees from the vertical is considered horizontal. The
total horizontal run of a vent plus the horizontal vent connector shall be not greater than 75
percent of the vertical height of the vent. Any offsets used should be as far above the drafthood
as possible to allow the venting action to begin before any restriction is encountered.
C) Use listed “B” type vent pipe. Do not use transite or any other type of ceramic pipe for
venting. Do not use single wall pipe for vent or vent connector.

1017480-A Page 4
TERMINATION
OF VENT MUST BE
SECURELY GUYED
OR BRACED IF IT
EXTENDS MORE
THAN FIVE (5)
FEET ABOVE
ROOF.
SAFE (See “Venting”)
NOTE: This may
result in the vent
safety switch
shutting down the
burner depending
on size and draw of
chimney.
NOT
RECOMMENDED
UNSAFE DO NOT INSTALL IN THIS MANNER
RECOMMENDED
Use proper
size “B” pipe or
chimney liner
inside chimney.
VENTING
Fig. A
Fig. C-1
Fig. C-2
Fig. C-3
10’
OR
LESS
MORE
THAN 10’
2’ MIN.
3’ MIN.
3’ MIN.
2’ MIN.
10’
CHIMNEY CHIMNEY
RIDGE
RIDGE
Height
above any
roof surface
within 10’
horizontally
Fig. B
1/4
See
Termination
Diagram
Above
Maintain 1” Clearance
Terminate vent
at least 5 ft.
above draft hood.
Support Laterals
Vertical Vent
Elbow
Listed
Appl.
Firestop Support
Assembly
Seal Around
Collar &
Flashings
CONNECTING THE
VENT INTO AN
EXISTING CHIMNEY

1017480-APage 5
TO HEATER GAS CONTROL VALVE
MANUAL CUT-OFF VALVE
1/8” NPT PRESSURE TAP
DRIP LEG
GAS
SUPPLY
LINE
Due to high temperatures the
appliance should be located
out of trafc and away from
furniture and draperies.
Children and adults should
be alerted to the hazards of
high surface temperature and
should stay away to avoid
burns or clothing ignition.
Young children should be
carefully supervised when
they are in the same room as
the appliance.
Clothing or other ammable
material should not be placed
on or near the appliance.
Any safety screen, guard,
or casing top removed for
servicing a room heater must
be replaced prior to operating
the appliance.
Do not use this heater if any
part has been under water.
Immediately call a qualied
service technician to inspect
the heater and to replace any
part of the control system and
any gas control which has
been under water.
For purpose of identifying the
sides of the heater. When
you are facing the front of the
heater the right side has the
access door and the left side
is solid.
If heater is installed in a
residential garage, the burner
and pilot must be above 18”.
Locate or protect heater so
it cannot be damaged by a
moving vehicle.
GAS SUPPLY LOCATION AND
SPECIAL PRECAUTIONS
This vented room heater must be connected to a gas supply capable of supplying the full rated
capacity. Provide a 1/8 inch N.P.T. plugged tapping, accessible for test gauge connection,
immediately upstream of the gas supply connection to the appliance.
The gas supply piping should be sized in
accordance with ANSI Z223.1 National Fuel Gas Code.
If the outlet pressure of the gas valve must be adjusted, this must be done by a qualied
service technician using proper tools and instruments.
Check all connections with soapy water for possible gas leaks. Never use a match, candle or
other ignition source. It is recommended that pipe compound which is resistant to the action of
liqueed petroleum gases be used. Do not use Teon tape or Teon impregnated compound.
The appliance and its individual shutoff valve must be disconnected from the gas supply
piping during any pressure testing of that system at test pressure in excess of ½ psig.
The appliance must be isolated from the gas supply piping 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 ½ psig.
Fig. D:
GAS SUPPLY
14” w.c. 14” w.c.
3.5” w.c. 10.0” w.c.
NATURAL GAS PROPANE GAS
4.5” w.c. 11.0” w.c.
MAXIMUM INLET PRESSURE
(Must NEVER Exceed):
NORMAL MANIFOLD PRESSURE:
GAS SUPPLY PIPE
MINIMUM INLET PRESSURE
(For purpose of input adjustment):

1017480-A Page 6
When installed, this gas appliance must be provided with fresh air for combustion,
ventilation, and dilution of hot ue gases. The minimum required volume of the
area where the appliance is installed must be 50 cubic feet per 1,000 btu/hr.
If installed in an area of the home that is considered an unconned space, the
natural inltration of air around windows and doors will be adequate. If the area
is considered a conned space (less than 50 cubic feet per thousand btu), fresh
air can be supplied by providing two permanent openings into adjoining rooms.
Each opening shall have a minimum free area of one square inch per 1,000 btu
per hour of the total input rating of all gas appliances in the conned space, but
not less than 100 square inches. One of the openings shall be within 12 inches
of the ceiling and one within 12 inches of the oor. See Figure E-1 (to the right).
If the home is of unusually tight construction (new and remodeled homes), free air
must be supplied through opening(s) to the outdoors. This can be accomplished
by providing 2 permanent openings, one commencing within 12 inches of the
ceiling and one within 12 inches of the oor. These openings shall communicate
directly with the outdoors, or spaces that communicate freely with the outdoors,
such as a ventilated attic and crawl space through galvanized or equivalent
corrosion-resistant ducts. Exception: Unobstructed stud and joist spaces are
acceptable ducts provided that not more than one re block is removed. Special
provisions must be taken to insure that these stud and joist spaces cannot be
blocked with insulation or other objects. Each of these openings using vertical
ducts shall have a minimum free area of one square inch per 4,000 btu/hr of
total input rating of all gas appliances. See Figures E-2 (to the right) and E-3
(below). If horizontal ducts are used, the minimum free area shall be one square
inch per 2,000 btu/hr of total input rating of all gas appliances.
Fresh make-up air can also be provided through a duct to one permanent
opening commencing within 12 inches of the ceiling. The minimum free area of
this opening shall be one square inch per 3,000 btu/hr of the total input rating of
all gas appliances but not less than the sum of the areas of all vent connectors
in the space. See Figure E-4 (below).
When calculating the amount of fresh air needed you must include make-up
air requirements for the operation of exhaust fans, kitchen ventilation systems,
clothes dryers, and replaces.
Additional information can be found in the latest edition of ANSI Z223.1
(National Fuel Gas Code).
COMBUSTION AND VENTILATION AIR Fig. E-1
ALL COMBUSTION AIR FROM
OUTDOORS. INLET AIR FROM
VENTILATED CRAWL SPACE &
OUTLET AIR TO VENTILATED ATTIC
Fig. E-2
ALL COMBUSTION AIR FROM
ADJACENT INDOOR SPACES
THROUGH INDOOR COMBUSTION
AIR OPENINGS
UL Listed Vent Cap
UL Listed Gas Vent
Opening
Opening
UL Listed Vent Cap
UL Listed Gas Vent
Ventilation
Louvers for Unheated Crawl Space
Outlet Air
Ventilation
Louvers
(Each
End of
Attic)
Inlet Air
ALL
COMBUSTION
AIR FROM
OUTDOORS
THROUGH
VENTILATED
ATTIC
UL Listed Vent Cap UL Listed Vent Cap
UL Listed Gas Vent UL Listed Gas Vent
Ventilation Louvers
(Each End of Attic)
Outlet Air
Inlet Air Duct
(Ends
1 ft.
[300mm]
Above
Floor)
Inlet
Grille
Inlet
Grille
ALL
COMBUSTION
AIR FROM
OUTDOORS
THROUGH
SINGLE
COMBUSTION
AIR OPENING
Fig. E-4
Fig. E-3
Opening
Alternate
Opening
Location

1017480-APage 7
If the area where the appliance is to be installed contains carpeting, tile,
or combustible materials, other than wood ooring, the appliance shall
be installed on a metal plate (stoveboard), a wood panel, or other non-
combustible materials. The use of ceramic or quarry tile is acceptable
and provides an appealing surface that is easily cleaned. This material
is to extend 2 inches from each side and 12 inches from the front. It is
advisable to extend this to the wall behind the appliance.
Clearances to Combustibles are as Follows:
• From jacket to adjacent side walls, 2” on the 20/35, and
6” on the 50. Maintain adequate clearance on right side
for accessibility.
• From rear surface vertical vent pipe to rear walls – 6”.
• From rear of unit to rear wall, 13” on 20/35, and 14” on
the 50.
• From top of heater to ceiling, 34” on the 20/35, and 31”
on the 50.
• From top of heater to any overhanging projections such
as a mantle or window sill is 22” on the 20/35, and 19
inches on the 50 model, with a maximum horizontal
extension of 18 inches.
The clearances around the air opening into the combustion chamber
must be maintained, and the burner must be kept clean.
Do not permit dust or dirt to accumulate here. The other clearances
previously mentioned must be maintained.
There must be adequate room provided and maintained around the
heater for accessibility and for the ow of combustion and ventilation air.
CLEARANCESDRAFT DIVERTER
The draft diverter must be installed in the
same atmospheric pressure zone as the
combustion air supply for the main burner.
Fig. G: WIRING DIAGRAMFig. F-2: CLEARANCES - VC50
Fig. F-1: CLEARANCES - VC20, VC35
18 IN.
45.72 CM
6 IN.
15.2 CM
14 IN.
35.6 CM
19 IN. 48.3 CM
31 IN. 78.7 CM
50
CEILING
18 IN.
45.72 CM
6 IN.
15.2 CM
13 IN.
33 CM
22 IN. 55.88 CM
34 IN. 86.36 CM
20/35
CEILING
CEILING
FLOOR
FLOOR
WALLWALL
BLOCKED
FLUE
SWITCH
TEMPERATURE
CONTROL
PILOT
GENERATOR

1017480-A Page 8
The pilot flame can be observed by opening the pilot lighting hole cover. The pilot flame should surround the top 3/8
to ½ inch of the pilot generator (See Figure H-2).
If the flame needs adjusting, first locate the pilot adjustment screw cap and remove. Adjustment screw is underneath
(See Figure H-1).
- To increase the flame, turn the pilot adjustment screw counterclockwise.
- To decrease the flame, turn screw clockwise.
NOTE: The pilot is unregulated. If incoming line pressure is more than 7” w.c. Natural Gas or 11” w.c. for L.P. Gas,
the pilot flame size should be decreased.
PILOT ADJUSTMENT
Pilot
Adj.
Screw
Fig. H-1
3/8 to 1/2 Inch
Pilot ame should
envelop 3/8 to
1/2 inch on the
tip of the
generator.
Fig. H-2: Pilot Flame Adjustment

1017480-APage 9
MAIN BURNER ORIFICE
CAUTION: THERE MAY BE MOMENTARY AND SPASMODIC ORANGE FLASHES IN THE FLAME.
This is caused by the burning of air borne dust particles and is not to be confused with the yellow tipping
which is a stable or permanent situation when there is insufficient primary air.
ORDER KIT #49820 45-1 High Altitude Kit
NATURAL GAS
Specic Elevations
VC201 45 47 48 49 50
VC351 35 37 38 40 42
VC501 30 31 31 32 35
Model
No.
0 to
2,000’
2,000’ -
4,000’
4,000’ -
6,000’
6,000’ -
8,000’
8,000’ -
10,000’
VC202 1.3mm 55 56 56 57
VC352 1.65mm 53 53 54 54
VC502 47 49 49 50 51
L.P. GAS
This appliance was shipped from the factory with an orice
sized to give the correct gas input using the gas for which the
heater was equipped. There may be local conditions, such
as variation in gas supply pressure or BTU content of the
gas, which may be cause for a change in the orice. The gas
company supplying the fuel or the installing contractor should
check the gas input rate.
If the rate exceeds the “BTUH INPUT” on the rating plate by
5%, the orice must be replaced with a smaller orice by a
qualied service technician to reduce the input to the rating
plate value.
The input rate will need to be adjusted for elevation above
2,000 Feet. See the Specic Elevations chart (to the right)
to determine the correct orice size for your Model Number
and elevation. These orice sizes are based on a heating
value of 1020 for Natural Gas and 2500 for L.P. Gas.
CAUTION: As elevation increases, derating is necessary
for the safe and proper operation of this heater. Do not
increase the Btu input rate by increasing the orice size
or gas pressure. Allow for elevation derating when sizing
gas heating equipment.
Fig. I: Proper Burner Flame
Inner Mantle 1/4” Outer Mantle 3 - 5”
3” to 5”
1/4”

1017480-A Page 10
MAINTENANCE
CLEANING - To clean the front casing of your heater, it is only necessary to use a soft cloth. Light dust can be removed in
this way. To obtain a polish or gloss, use a little light machine oil on the cloth. Do not use metal polish or cleaning solution.
The burner ports should be kept free from lint and dust.
CLEANING OF COMBUSTION CHAMBER
The combustion chamber of your console heater should never need to be cleaned if proper burner adjustment and gas
pressures are maintained. However, if an unusual circumstance should occur, the following procedure should be followed in
cleaning your combustion chamber.
1. Turn off gas supply to heater at
manual valve in supply line to heater.
2. Disconnect heater at ground joint union
ahead of main gas valve.
3. Remove main control and orice assembly.
4. Remove burner.
5. Remove combustion chamber.
6. Using a scraper, scrape inside of a primary
combustion chamber. This should be area
of heaviest accumulation of carbon.
7. Remove plug bottom located in bottom rear
of second combustion chamber. Using a
bottlebrush, clean inside of this chamber.
Shake residue out the clean-out hole.
8. Clean the rear chamber by using
bottlebrush through the vent tube openings.
9. Replace combustion chamber, burner
and control. Check all gas piping for leaks
before lighting heater.
Repair service must be performed by a qualied service technician. The heater should be inspected before initial use. An
annual cleaning of control compartment and safety performance check must be made by a qualied service technician. More
frequent cleaning may be required when exposed to the excessive lint conditions due to carpeting and bedding material, etc.
It is imperative that the control compartment, burners, and circulating air passageways of the heater be kept clean. Any safety
screen, casing top, or guard removed for servicing the heater must be replaced prior to operating heater.
If the venting system is not maintained in proper operating condition, the vent safety shutoff will not allow heater to operate.
Periodic examination of the entire venting system as a routine part of the safety performance check must be performed on
an annual basis.
It is advised that the pilot and main burner ames be checked at least twice during the heating season for any changes in
ame characteristics. See Figures H-2 & Figure I (on pages 8 & 9).
THIS IS A GAS-FIRED APPLIANCE, KEEP THE AREA CLEAR OF GASOLINE AND OTHER FLAMMABLE
VAPORS & LIQUIDS. ALL COMBUSTIBLE MATERIAL MUST BE KEPT CLEAR OF THIS AREA.
Have a qualied service technician check the burner periodically. Remove and clean if necessary.
SERVICE RECORDS

1017480-APage 11
A. This appliance has a pilot which must be
lighted by hand. When lighting the pilot,
follow these instructions exactly.
B. BEFORE LIGHTING smell all around the
appliance area for gas. Be sure to smell
next to the oor because some gas is
heavier than air and will settle on the oor.
WHAT TO DO IF YOU SMELL GAS:
• DO NOT try to light any appliance.
• DO NOT touch any electric 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.
FOR YOUR SAFETY READ BEFORE LIGHTING
MODELS: VC201C / VC351C / VC501C
• If you cannot reach your gas supplier,
call the re department.
C. Use only your hand to push in or turn
the gas control knob. Never use tools. If
the knob will not push in or turn by hand,
don’t try to repair it, call a qualied service
technician. Force or attempted repair may
result in a re or explosion.
D. Do not use this appliance if any part has
been under water. Immediately call a
qualied service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.
4. Wait ve (5) minutes to clear out any gas.
Then smell for gas, including near the oor. If you
smell gas, STOP! Follow “B” in the information on
the safety label. If you don’t smell gas, go to the next
step.
5. Open casing door and pilot lighting hole cover.
6. Find pilot. (Follow metal pilot tube from gas control).
7. Locate red piezo ignitor button on top of heater.
8. Turn gas control knob counterclockwise to
“PILOT”.
LIGHTING INSTRUCTIONS
WARNING:
If you do not
follow these
instructions
exactly, a re
or explosion
may result
causing
property
damage,
personal
injury or loss
of life.
LIGHTING INSTRUCTIONS
TURNING OFF GAS TO APPLIANCE
1. STOP! Read the information on the safety label.
2. Turn temperature control knob to “OFF” or to it’s
lowest position.
3. Depress and turn gas control knob clockwise
to “OFF” position.
1. Turn the temperature control knob to it’s lowest setting.
2. Push in gas control knob slightly and turn clockwise to “OFF”. Do not force.
9. Push in gas control
knob and hold in.
Immediately begin a series of pushing and releasing
the red piezo ignitor button, while observing the
pilot. Continue to spark until pilot is lit. Continue
to hold the gas control knob in for about one (1)
minute after the pilot is lit. Release the gas control
knob and it will pop back up. Pilot should remain lit.
If pilot goes out, repeat steps 3 thru 9.
• If knob does not pop up when released, STOP and
immediately call your service technician or gas supplier.
• If the pilot will not stay lit after several tries, turn the gas
control knob to “OFF” and call your service technician
or gas supplier.
10. Close pilot lighting hole cover and casing door.
11. Turn gas control knob counterclockwise to
“ON”.
12. Turn temperature control knob to desired setting.
Pilot is located on end
of combustion chamber
above burner.
Gas Control Knob NOTE:
Knob can not
be turned from
“PILOT” to “OFF”
unless knob
is pushed in
slightly.
Do not force.
Fig. J-1
Fig. J-2

1017480-A Page 12
Flame Too
Large
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
TROUBLESHOOTING CHART ( FOR QUALIFIED SERVICE TECHNICIAN ) - MAIN BURNER
1. Defective operator section of gas valve.
2. Burner orice too large.
3. Pressure regulator malfunction.
1. Replace complete valve.
2. See orice chart to determine the correct size for your Model Number & elevation.
3. Regulator must be adjusted by a qualied serviceman using proper tools
and instruments.
1. Noisy pilot.
2. Burr in orice
(if it whistles or resonates).
3. Excessive gas input.
1. Clogged main burner ports.
2. Clogged draft hood.
3. Linted up air shutter.
1. Blocked venting.
1. Chimney or ue obstruction.
2. Drafts around heater.
3. Gas leak.
1. Main gas off.
2. Defective gas valve.
1. Defective or sticking
automatic valve.
2. Excessive gas pressure
(The supply gas pressure must not
exceed 1/2 psi or 14” water column).
1. Pilot ame too small.
2. Burner ports clogged near pilot.
3. Low gas pressure.
4. Pilot decreases in size when main
burners come on.
5. Drafts around unit.
6. Pilot lighter door open causing
disturbance of pilot ame.
7. Improper venting.
8. Pressure regulator malfunction.
Noisy
Flame
Yellow Tip
Flames
(Some yellow
tipping on LP Gas
is permissible)
Floating Flame
Gas
Odor
Failure to
Ignite
Burner Won’t
Turn Off
Delayed
Ignition
1. Reduce pilot gas with adjusting screw on combination gas. (See Fig. H-1).
2. Remove burr or replace orice (Do not enlarge orice).
3. See “Flame Too Large”, above.
1. Clean main burner ports (Do not enlarge ports).
2. Clean draft hood.
3. Check for dust or lint at air mixer opening and around the shutter.
1. Clean ue passageways to relieve blockage.
1. Open all manual gas valves.
2. Replace gas valve.
1. Clean or replace valve.
2. To correct this situation contact the utility supplying the gas.
See the “Gas Supply” section (Page 5).
1. Check pilot orice, clean, increase pilot gas ow if necessary by adjusting at
combination control valve (See Fig. H-1 on page 8).
2. Clean burner ports (do not enlarge ports).
3. Check gas supply pressure. See “Gas Supply”.
4. Supply piping is inadequately sized. Consult local gas utility or competent
installer.
5. Eliminate drafts.
6. Close pilot lighter door.
7. See “Venting” (Page 3).
8. Regulator must be adjusted by a qualied serviceman using proper tools and
instruments.
1. Improper venting.
Condensation
of Water Vapor
1. See the “Venting” section (Pages 3-4).
1. Clean ue.
2. Eliminate drafts.
3. Shut off gas service immediately. Check piping. Call gas company. See “For
Your Safety” (See Page 1), and “Gas Supply” (See Page 5).

1017480-APage 13
1. Pilot ame too large or too small.
2. Defective combination control valve.
1. Dirt in pilot orice.
2. Pilot lighter door open.
3. Defective automatic pilot section in
combination control valve.
4. Defective pilot generator.
5. Vent safety shut off system.
1. Pilot ame too large or too small.
2. Defective pilot generator.
3. Defective gas valve.
4. Loose connections at spill switch or
ECO on gas valve.
Burner Won’t
Light
Pilot
Outage
Pilot Will
Not Stay Lit
When Control
Knob is
Released
1. Re-adjust pilot ame using adjustment on combination control valves (See
Fig. H-1 & H-2 on page 8).
2. Replace valve.
1. Clean pilot orice with air or solvent, do not ream.
2. Close pilot lighter door.
3. Replace combination control valve.
4. Replace pilot generator.
5. See the “Venting” section (Pages 3-4).
1. Re-adjust pilot ame using adjustment on combination control valves (See
Fig. H-1 & H-2 on page 8).
2. Replace pilot generator.
3. Replace gas valve.
4. Tighten connections.
Too Much
Heat
TROUBLESHOOTING CHART - AUTOMATIC PILOT & VALVE
1. Temperature dial set too high.
2. Combination control
valve sticks open.
1. Lower setting of temperature dial. See “Lighting & Shutting Down
Instructions” on page 11.
2. Replace combination control valve.
1. Heater undersized.
2. Temperature dial set too low.
3. Incorrect gas supply pressure.
Not
Enough
Heat
1. This is especially true when a dwelling or room is enlarged. Have the heat
loss calculated and compare to the heater output (70% of input). Your
gas company or installer can supply you with this information. If heater is
undersized, replace with correct size unit.
2. Raise setting of temperature dial. See “Lighting & Shutting Down
Instructions.” (See Page 11).
3. Check gas supply pressure and regulator pressure as outlined above.
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
TROUBLESHOOTING CHART - POOR HEATING RESULTS
1. Gas input not checked.
2. Clogged orice.
3. Pressure regulator.
4. Thermostat capillary tube damaged.
Incorrect
Gas Input
1. Re-check gas input. See “Gas Supply”.
2. Check orices for clogging. If clogged, clean out the hole carefully with a
smooth wood toothpick. (Do not in any way enlarge or distort it).
3. Regulator must be adjusted by a qualied serviceman using proper tools and
instruments.
4. Replace bulb control switch.

1017480-A Page 14
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can
cause improper and dangerous operation. Verify proper operation after servicing.
CHB-3 BLOWER INSTALLATION - ( OPTIONAL )
This kit must be installed by a qualified installer or service technician.
STEP 1. Run black wire & white wire that comes from bottom of
junction box down through the heat shield. See Figure K-1.
STEP 2. Insert junction box into opening in back of heater. Attach
using four #8x1/2” black screws provided. See Figure K-1.
STEP 3. Attach fan switch to fan switch bracket using two #8x1/2”
plated, Phillip head screws provided. The 2” flange on the
bottom of bracket and terminals on the fan switch should be
toward the back of the heater when properly installed.
STEP 4. Locate the two engagement holes in base of heater. On
a 35,000 Btu heater these holes are approximately 6-1/2”
from the back edge and right and left holes are 5-1/4” and
7-1/4” respectfully from the right side (as viewed from
back of heater). On a 50,000 Btu heater the holes are
approximately 10-3/4” from the back edge and right and
left holes are 5-3/8” and 7-3/8” respectfully from the right
side. Attach fan switch bracket to base using two #8x1/2”
hex head screws provided. This will require a ¼” socket and
ratchet. See Figure K-1.
STEP 5. Locate the blower opening and mounting tab on the base
of the heater. Insert the front flange of the blower housing
under the mounting tab, lower the back of the blower down
onto the base aligning the clearance holes in the blower
base with the engagement holes in the heater base. Secure
the blower to the base with two #8 screws provided. See
figure K-1.
STEP 6. Connect black wire from junction box to right fan switch
terminal. See Figure K-2.
STEP 7. Connect white wire from junction box to white fan motor
wire. See Figure K-2.
STEP 8. Connect black wire from fan motor to left fan switch terminal.
See Figure K-2.
STEP 9. Turn variable speed control switch clockwise
(as viewed from front of unit) to “OFF”.
STEP 10. Plug power cord into 115 V. grounded receptacle.
STEP 11. Turn variable speed control switch counterclockwise
(as viewed from front of unit) from “OFF” to “HIGH”.
Blower will now cycle on automatically when the switch
temperature is met after the main burner comes on. The
blower will continue to run for a short period after the main
burner goes off. Blower speed can be adjusted by setting
the variable speed control switch between high and low.
WARNING: This appliance is
equippedwithathree-prong(grounding)
plug for your protection against shock
hazard and must be plugged directly
into a properly grounded three-prong
receptacle. Do not cut or remove the
grounding prong from this plug.
Fig. K-1
Fig. K-2
If any part of the original wire as suppied with the
appliance must be replaced, it must be replaced with a
wire of at least a 105 degree C temperature rating.
POWER
CORD
JUNCTION
BOX
HEAT SHIELD
FAN SWITCH
BRACKET
BLOWER
HOUSING
MOUNTING TAB
SPEED
CONTROL
MOTOR
SPEED
CONTROL
BLACK
BLACK
WHITE
WHITE
GREEN
BLACK
FAN
SWITCH
MOTOR

1017480-APage 15
TSK WALL STAT KIT - ( OPTIONAL )
( VC-C Dexen Valve Series ) | WALL THERMOSTAT INSTALLATION INSTRUCTIONS
This kit must be installed by a qualified installer or service technician.
Your heater can be re-wired to operate with a millivolt wall thermostat by your qualified installer/service person. See wiring
diagram below for correct wiring. NOTE: Do not disconnect the wire from the blocked flue switch to the “TH” terminal
on the gas valve.
STEP 1. Turn temperature control knob to “OFF” or lowest setting.
STEP 2. Turn gas valve control knob to “OFF”.
STEP 3. Disconnect wire leading from Part #80180 (Bulb Control Switch) from valve.
STEP 4. Cut the remaining wire leading from Part #80180 (Bulb Control Switch) to the blocked flue switch, leaving its
end connected to the blocked flue switch and leaving enough length to reach the gas valve. Strip 1/2” of the
insulation from the cut end of the wire.
STEP 5. Connect one leg of thermostat wire to the “TH/PP” terminal on the gas valve.
STEP 6. Connect second leg from the thermostat to the stripped wire coming from the blocked flue switch. Secure this
connection inside the heater cabinet.
STEP 7. Secure both red wires from blocked flue switch inside heater cabinet. Make sure none of the wires have enough
slack to lay against the heat exchanger or draft hood.
STEP 8. Remove lighting instructions P/N 91245, 91246, 91247 from back of heater and replace with P/N 91242, 91243,
91244 lighting instructions supplied in TSK Kit.
STEP 9. Follow lighting instructions to place heater in operation.
Fig. L
THERMOSTAT
(Optional)
BLOCKED
FLUE
SWITCH
WIRE
NUT
(Not Provided)PILOT
GENERATOR

1017480-A Page 16
VENTED CONSOLE - ( PARTS LIST )
VC-C Closed Front Circulators & CHB3 Blower | Specifications are subject to change without notice.
ATTN: Contractors and Qualied Service Technicians
We only sell parts through our wholesalers. For prompt parts service,
contact the wholesaler from which you purchased your Cozy heater.
NOTICE: When ordering any
component in the control train assembly,
specify either Dexen, Honeywell, or
Robertshaw components.
Fig. M-1
NOTE: Parts & schematic drawings on current models are shown at: cozyheaters.com
Specications subject to change without notice.
HOW TO PROPERLY
ORDER PARTS:
In addition to the part description
and numbers, please be prepared
to provide:
- Model Number
- Serial Number
- Type of Gas Used
This information can be found on
the rating plate that is attached to
the heater.
FOR NAT. MODELS: VC351C VC501CVC201C
PART DESCRIPTION
1HOUSING, VC Service 1017474 1017475 1017476
2DOOR, Small Service 1017477 1017477 1017478
3 KNOB, Phenolic Fluted-Rim 1017451 1017451 1017451
4 U-NUT, Clip-on No-Slip Pk25 1017452 1017452 1017452
5 INSULATION, Foil Faced, 8.5 x 6.5 1017286 1017286 1017287
6 BRACKET, Door 1017285 1017285 1017285
7 SCREW, 8 x 1/2 Pan, Teks Pt. (Qty: 2) 50605 50605 50605
8 INSULATION, Foil Faced 80281 80286 80289
9 BRACKET 1017227ASM 1017282ASM 1017282ASM
10 INSULATION, Foil Faced 80280 80297 80297
11 BRACKET (Qty: 2) 1017281ASM 1017283ASM 1017283ASM
12 BRACKET 1017227ASM 1017284ASM 1017284ASM
13 INSULATION, Foil Faced 80281 80285 80288
REF. # PART NO. PART NO. PART NO.
1
2
3
56 7+
4+
9
10
11
1312
8

1017480-APage 17
FOR NAT. MODELS: ADDITIONAL PARTS:
VC351C VC501CVC201C
PART DESCRIPTION PART DESCRIPTION PART NO.REF. # PART NO. PART NO. PART NO.
14 PIEZO IGNITOR 80016 80016 80016
15 CASING, Top Assembly 45052-10 45552-10 46402-10
16 GROMMET, Control Rod 80010 80010 80010
17 REMOTE MOUNTING BRACKET 45062 45062 45062
18 BULB CONTROL SWITCH (Cotherm) 80180 80180 80180
19 HEAT EXCHANGER, Closed Front 45200 45675 46500
20 REAR LEG, Heat Exchanger N/A 45760 45760
21 GUSSET *45195 *45195 *45195
22 CASING BASE, Assembly 45175 45640 46460
23 LEG LEVELLERS, 4 per heater 80009 80009 80009
24 DRAFT DIVERTER, Assembly 45300 45783 46558
25 CASING, Back Assembly 45150 45612 45612
26 SWITCH, Vent Safety Spill / VC 80102 80106 84166
27 WIRING HARNESS 80212 80213 80213
28 VALVE, 6003 Natural Gas Valve, Dexen 84085 84085 84085
29 VALVE, Support Bracket 45336 45336 45336
30 MANIFOLD 80133 80133 80135
31 ORIFICE NUT 80024 80024 80024
32 BURNER ORIFICE, Natural Gas 80025 80058 80119
33 BURNER, Steel 80123 80124 80125
34 PILOT ASSY. 0.140.514 Nat. w/ Electrode 80062 80062 80062
35 PILOT GENERATOR 23” 70098 70098 70098
36 LIGHTING HOLE COVER, Pilot 45332 45332 45332
37 BURNER MOUNTING PLATE, Assembly 45817 45817 45817
38 PILOT TUBING Assy. w/Fittings 24” 70012 70012 70012
39 PIEZO WIRE 80128 80128 80128
COZY LOGO Emblem 80006
CLIPS, for Cozy Emblem 80007
LIGHTING INSTRUCTIONS 47740
HEAT EXCHANGER SPACER:
VC201C, Spacer N/A
VC351C, Spacer 45845
VC501C, Spacer 45845
Fig. M-2
23
22
16 24
25
26
27
30 28
32
33
34
35
37
36
38
39
29 23
31
21
17
18
15
14
19
20
*Two (2) are
Required
Specications subject to
change without notice.
VC352C VC502C
28 VALVE, 6003 L.P. Gas Valve, Dexen 84086 84086 84086
34 PILOT ASSY. 0.140.504 L.P. w/ Electrode 80063 80063 80063
32 BURNER ORIFICE, L.P. Gas 80027 80060 80120
FOR MODELS THAT HAVE BEEN CONVERTED TO LP: VC202C

1017480-A Page 18
Fig. M-3
49
48
47
46
44
45
40
41
42
43
VENTED CONSOLE - ( PARTS LIST )
VC-C Closed Front Circulators & CHB3 Blower | Specifications are subject to change without notice.
ATTN: Contractors and Qualied Service Technicians
We only sell parts through our wholesalers. For prompt parts service,
contact the wholesaler from which you purchased your Cozy heater.
NOTICE: When ordering any
component in the control train assembly,
specify either Dexen, Honeywell, or
Robertshaw components.
HOW TO PROPERLY
ORDER PARTS:
In addition to the part description
and numbers, please be prepared
to provide:
- Model Number
- Serial Number
- Type of Gas Used
This information can be found on
the rating plate that is attached to
the heater.
BLOWER PARTS
Optional for VC351C & VC50C.
CHB-3
BLOWER
PART DESCRIPTIONREF. # PART NO.
40 JUNCTION BOX, Assembly 47850
41 SPEED CONTROL SWITCH, with Knob & Decal 70111
42 COVER, Junction Box 47870
43 POWER CORD 80202
44 WIRING HARNESS, Motor 80256
45 FAN SWITCH 80253
46 BRACKET, Fan Switch 47840
47 BLOWER / MOTOR, Assembly 80251
48 MOUNTING BRACKET 47835
49 BLOWER NOZZLE, Assembly 47820
N/A BLOWER GASKET, 7 - 1/4” *80257
N/A BLOWER GASKET, 4 - 5/8” *80258
* Two (2) are Required
NOTE: Parts & schematic drawings on
current models are shown at: cozyheaters.com
Specications subject to change without notice.

1017480-APage 19
COZY HEATING SYSTEMS, LLC
3230 INDUSTRIAL PARKWAY. – JEFFERSONVILLE, IN 47130
LIMITED WARRANTY
Cozy Heating Systems LLC warrants to the original
user the accompanying product for the period specified
herein, provided said product is installed, operated,
maintained, serviced, and used according to the
instructions and specifications accompanying the
product. AS OUTLINED IN OUR INSTRUCTIONS, ANY
WARRANTY CONSIDERATIONS ARE CONTINGENT
ON INSTALLATION BY A QUALIFIED INSTALLER
(CONTRACTOR).SELF-INSTALLATIONISPROHIBITED
AND WILL INVALIDATE YOUR WARRANTY.
If within a period of one year from the date of installation
of the product, any part supplied by the manufacturer
proves to be defective due to workmanship or material,
it will replace such part, provided parts have not been
subjected to misuse, alteration, neglect, or accidents.
The term of the warranty for the heat exchanger and
burners is covered in Table A below. Any claim not made
within ten (10) days after the expiration of the warranty
period shall be deemed waived by the user.
The manufacturer shall have no liability or be required
to perform any obligation under this warranty unless, when
requested, the user returns, at the user’s expense, the
component or product claimed defective, to the manufacturer
for inspection, to enable the manufacturer to determine if the
claimed defect is covered by this warranty.
No charges for freight, labor or other expenses incurred
in the repair, removal, or replacement of any product
or component claimed to be defective, will be paid by
the manufacturer to the user, and the manufacturer will
not be liable for any expenses incurred, by the user, in
remedying any defect in the product.
Service under this warranty is the responsibility of
the installer. In the event service under this warranty
is needed, the user of the product shall request such
service directly from the installer. If the user is unable
to locate the installer, the user should write directly to
the manufacturer, and the name of an alternative service
source will be supplied.
The product safety registration card (packed inside
the appliance) must be completed and returned to the
factory.
_________________________________________________
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED (WHETHER
WRITTEN OR ORAL). ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR
PURPOSE IS EXPRESSLY LIMITED TO THE DURATION
OF THE MANUFACTURER’S EXPRESS, WRITTEN
WARRANTY.
UNDER NO CIRCUMSTANCES SHALL THE
MANUFACTURER BE LIABLE FOR ANY SPECIAL, INDIRECT
OR CONSEQUENTIAL DAMAGES OR EXPENSES ARISING
DIRECTLY OR INDIRECTLY FROM ANY COMPONENT
OR FROM THE USE THEREOF. THE REMEDIES SET
FORTH HEREIN SHALL BE THE EXCLUSIVE REMEDIES
AVAILABLE TO THE USER AND ARE IN LIEU OF ALL
OTHER REMEDIES.
SOME STATES DO NOT ALLOW LIMITATIONS ON HOW
LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE
LIMITATIONS MAY NOT APPLY TO YOU.
SOME STATES DO NOT ALLOW THE EXCLUSION OR
LIMITATION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THE ABOVE LIMITATIONS OR EXCLUSIONS
MAY NOT APPLY TO YOU.
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS,
AND YOU MAY ALSO HAVE OTHER RIGHTS, WHICH VARY,
FROM STATE TO STATE.
WARRANTY PERIOD
PRODUCT HEAT EXCHANGER / TUBES BURNERS
Cozy Gas Fired Floor Furnace 10 Years 10 Years
Cozy Gas Fired Wall Furnace 10 Years 10 Years
Cozy Gas Fired Vented Console Heater 10 Years 10 Years
Cozy Gas Fired Direct Vent Heater 10 Years 10 Years
Cozy Gas Fired Counterow Furnace 10 Years 10 Years
Cozy Gas Fired Counterow Direct Vent Furnace 10 Years 10 Years
Cozy Gas Fired Hi-Efcient Direct Vent Wall Furnace 10 Years 10 Years
Cozy Fan-Type, Direct Vent Through-The-Wall Gas Heater 10 Years 10 Years
TABLE - A