Desa VN10, VN6C User Manual
INFRARED VENT-FREE NATURAL GAS HEATER
®
OWNER’S OPERATION AND INSTALLATION MANUAL
®
MODELS: VN6C AND VN10
WARNING: If the information in this manual is not followed exactly, a fire or explosion may
result causing property damage, personal injury, or loss of life.
—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.
• 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: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which
it is installed. Provisions for adequate combustion must be provided. Refer to page 3 of this
manual.
This appliance may be installed in an aftermarket* manufactured (mobile) home, where not
prohibited by state or local codes.
* Aftermarket: Completion of sale, not for purpose of resale, from the manufacturer
This appliance is only for use with the type of gas indicated on the rating plate. This appliance
is not convertible for use with other gases.
Save this manual for future reference.
VANGUARD VN6C AND VN10
NATURAL GAS HEATER
SAFETY
INFORMATION
WARNINGS
WARNING ICON G 001
IMPORTANT: Read this Owner’s
Manual carefully and completely
before trying to assemble, operate, or service this heater. Improper use of this heater can
cause serious injury or death from
burns, fire, explosion, and carbon monoxide poisoning.
DANGER: Carbon monoxide
poisoning may lead to death!
Carbon Monoxide Poisoning: Early
signs of carbon monoxide poisoning resemble the flu, with headaches, dizziness,
or nausea. If you have these signs, the heater
may not be working properly. Get fresh air
at once! Have heater serviced. Some people
are more affected by carbon monoxide than
others. These include pregnant women, persons with heart or lung disease or anemia,
those under the influence of alcohol, and
those at high altitudes.
Natural Gas: Natural gas is odorless. An
odor-making agent is added to natural gas.
The odor helps you detect a natural gas leak.
However, the odor added to natural gas can
fade. Natural gas may be present even though
no odor exists.
Make certain you read and understand all
Warnings. Keep this manual for reference.
It is your guide to safe and proper operation
of this heater.
WARNING: Any change to this heater or
its controls can be dangerous.
1. This appliance is only for use with the
type of gas indicated on the rating plate.
This appliance is not convertible for use
with other gases.
2. If you smell gas
• shut off gas supply
• 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 fire department
3. Heater model VN10 shall not be installed in a bathroom.
4. Never install the heater
• in a recreational vehicle
• where curtains, furniture, clothing, or
other flammable objects are less than
36 inches from the front, top, or sides
of the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
5. Always run heater with control knob
at LOW or HIGH locked positions
(VN10) or ON position (VN6C). Never
set control knob between locked positions. Poor combustion may result.
6. This heater needs fresh, outside air ventilation to run properly . This heater has
an oxygen depletion sensor (ODS) pilot light safety system. The ODS shuts
down the heater if not enough fresh air
is available. See Air for Combustion
and Ventilation, pages 3 through 5.
7. Keep all air openings in front and bottom of heater clear and free of debris.
This will insure enough air for proper
combustion.
8. If heater shuts off, do not relight until
you provide fresh, outside air. If heater
keeps shutting off, have it serviced.
9. Do not run heater
• where flammable liquids or vapors
are used or stored
• under dusty conditions
10. Never place any objects on the heater.
11. Surface of heater becomes very hot
when running heater. Keep children and
adults away from hot surface to avoid
burns or clothing ignition. Heater will
remain hot for a time after shut-down.
Allow surface to cool before touching.
12. Carefully supervise young children
when they are in same room with
heater.
13. Make sure grill guard is in place before running heater.
14. Do not use heater if any part has been
under water. Immediately call a qualified service technician to inspect the
room heater and to replace any part of
the control system and any gas control
which has been under water.
15. Turn off heater and let cool before ser vicing. Only a qualified service person
should service and repair heater.
16. Operating heater above elevations of
4,500 feet could cause pilot outage.
2
101851
OWNER’S MANUAL
PRODUCT
IDENTIFICATION
Piezo Ignitor Button
Control Knob
Front Panel
Figure 1 - Vent-Free Natural Gas Heater (Model VN10 Shown)
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes,
use the latest edition of National Fuel Gas
Code ANSI Z223.1, also known as NFPA
54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
PRODUCT
FEATURES
SAFETY PILOT
This heater has a pilot with an Oxygen
Depletion Sensor Shutoff System (ODS).
The ODS/pilot is a required feature for ventfree room heaters. The ODS/pilot shuts off
the heater if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system
requires no matches, batteries, or other
sources to light heater.
UNPACKING
1. Remove heater from carton.
2. Remove all protective packaging applied to heater for shipment.
3. Check heater for any shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.
Grill Guard
Burners
Heater
Cabinet
AIR FOR
COMBUSTION AND
VENTILATION
WARNING: This heater shall
not be installed in a confined
space unless provisions are provided for adequate combustion
and ventilation air. Read the following instructions to insure
proper fresh air for this and other
fuel-burning appliances in your
home.
Today’s homes are built more energy efficient than ever. New materials, increased
insulation, and new construction methods
help reduce heat loss in homes. Home owners weather strip and caulk around windows
and doors to keep the cold air out and the
warm air in. During heating months, home
owners want their homes as airtight as possible.
While it is good to make your home energy
efficient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning
appliances need fresh air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and
fuel burning appliances draw air from the
house to operate. You must provide adequate fresh air for these appliances. This
will insure proper venting of vented fuelburning appliances.
PROVIDING ADEQUATE
VENTILATION
The following is exerpts from National Fuel
Gas Code. NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classifications:
1. Unusually Tight Contruction; 2. Unconfined Space; 3. Confined Space.
The information on pages 4 and 5 will help
you classify your space and provide adequate ventilation.
Continued
101851
3
VANGUARD VN6C AND VN10
NATURAL GAS HEATER
AIR FOR
COMBUSTION AND
VENTILATION
Continued
UNUSUALLY TIGHT
CONSTRUCTION
The air that leaks around doors and windows may provide enough fresh air for
combustion and ventilation. However, in
buildings of unusually tight construction,
you must provide additional fresh air.
Unusually tight construction is
defined as construction where:
a.walls and ceilings exposed to
the outside atmosphere have a
continuous water vapor retarder with a rating of one perm
-11
(6x10
less with openings gasketed or
sealed
b.weather stripping has been
added on openable windows
and doors
c.caulking or sealants are ap-
plied to areas such as joints
around window and door
frames, between sole plates
and floors, between wall-ceiling joints, between wall panels,
at penetrations for plumbing,
electrical, and gas lines, and at
other openings.
If your home meets all of the three
criteria above, you must provide additional fresh air. See
From Outdoors
If your home does not meet all of the
three criteria above, proceed to
mining Fresh-Air Flow For Heater Location
.
Confined and Unconfined Space
The National Fuel Gas Code (ANSIZ2123.1,
1992 Section 5.3) defines a confined space
as a space whose volume is less than 50
cubic feet per 1,000 Btu per hour (4.8 m3 per
kw) of the aggregate input rating of all
appliances installed in that space and an
unconfined space as a space whose volume
is not less than 50 cubic feet per 1,000 Btu
per hour (4.8 m3 per kw) of the aggregate
input rating of all appliances installed in that
kg per pa-sec-m2) or
and
and
Ventilation Air
, page 5
.
Deter-
space. Rooms communicating directly with
the space in which the appliances are installed*, through openings not furnished
with doors, are considered a part of the
unconfined space.
* Adjoining rooms are communicating only
if there are doorless passageways or ventilation grills between them.
DETERMINING FRESH-AIR
FLOW FOR HEATER
LOCATION
Determining if You Have a
Confined or Unconfined Space
Use this worksheet to determine if you have
a confined or unconfined space.
Space: Includes the room in which you
will install heater plus any adjoining rooms
with doorless passageways or ventilation
grills between the rooms.
1. Determine the volume of the space
(length x width x height).
Length x Width x Height =
__________ cu. ft. (volume of space)
Example:
Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) =
2560 cu. ft. (volume of space)
If additional ventilation to adjoining
room is supplied with grills or openings, add the volume of these rooms to
the total volume of the space.
2. Divide the space volume by 50 cubic
feet to determine the maximum Btu/Hr
the space can support.
________ (volume of space) ÷ 50 cu.
ft. = (Maximum Btu/Hr the space can
support)
Example:
space) ÷ 50 cu. ft. = 51.2 or 51,200
(maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in the space.
Vent-free heater __________ Btu/Hr
Gas water heater* ________ Btu/Hr
Gas furnace _____________ Btu/Hr
Vented gas heater _________ Btu/Hr
Gas fireplace logs ________ Btu/Hr
Other gas appliances*+ ____ Btu/Hr
Total = ____ Btu/Hr
2560 cu. ft. (volume of
Example:
Gas water heater 40,000 Btu/Hr
Vent-free heater + 10,000 Btu/Hr
Total = 50,000 Btu/Hr
* Do not include direct-vent gas appli-
ances. Direct-vent draws combustion
air from the outdoors and vents to the
outdoors.
4. Compare the maximum Btu/Hr the
space can support with the actual
amount of Btu/Hr used.
__________ Btu/Hr (maximum the
space can support)
__________ Btu/Hr (actual amount of
Btu/Hr used)
Example:
The space in the above example is a confined space because the actual Btu/Hr used
is more than the maximum Btu/Hr the space
can support. You must provide additional
fresh air. Your options are as follows:
A. Rework worksheet, adding the space of
B. Vent room directly to the outdoors. See
C. Install a lower Btu/Hr heater, if lower
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support, the
space is an unconfined space. You will need
no additional fresh air ventilation.
the heater may be operated is
smaller than that defined as an
unconfined space, provide adequate combustion and ventilation air by one of the methods
described in the
Gas Code, ANSI Z223.1, 1992,
Section 5.3 or applicable local
codes.
46,100 Btu/Hr (maximum
the space can support)
50,000 Btu/Hr (actual
amount of Btu/Hr used)
an adjoining room. If the extra space
provides an unconfined space, remove
door to adjoining room or add ventilation grills between rooms. See V entila-
tion Air From Inside Building, page 5.
V entilation Air From Outdoors, page 5.
Btu/Hr size makes room unconfined.
WARNING: If the area in which
National Fuel
4
101851
AIR FOR
COMBUSTION AND
VENTILATION
Continued
VENTILATION AIR
OWNER’S MANUAL
12"
Ventilation Air From Inside
Building
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconfined space, you must provide two permanent openings: one within
12" of the ceiling and one within 12" of the
floor on the wall connecting the two spaces
(see options 1 and 2, Figure 2). You can also
remove door into adjoining room (see option 3, Figure 2). Follow the National Fuel
Gas Code NFPA 54/ANSI Z223.1, Section
5.3, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
WARNING: Rework worksheet, adding the space of the
adjoining unconfined space. The
combined spaces must have
enough fresh air to supply all
appliances in both spaces.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two permanent openings: one within 12" of the
ceiling and one within 12" of the floor.
Connect these items directly to the outdoors
or spaces open to the outdoors. These spaces
include attics and crawl spaces.
IMPORTANT:
for inlet or outlet air into attic if attic has a
thermostat-controlled power vent. Heated
air entering the attic will activate the power
vent.
Do not provide openings
Ventilation
Grills
into Adjoining
Room,
Option 1
Figure 2 - Ventilation Air from Inside Building
Or
Remove
Door into
Adjoining
Room,
Option 3
Outlet
Air
12"
Ventilated
Attic
Outlet
Air
Ventilation Grills
Into Adjoining Room,
Option 2
To Attic
101851
Inlet
Air
Inlet Air
Figure 3 - Ventilation Air from Outdoors
5
To
Crawl
Space
Ventilated
Crawl Space
VANGUARD VN6C AND VN10
36"
3"
FLOOR
CEILING
Minimum
Minimum To Top Surfac
Of Carpeting, Tile Or Ot
Combustible Material
8"
Minimum
From
Sides Of
Heater
Right
Side
Left
Side
NATURAL GAS HEATER
INSTALLING TO
WALL
NOTICE: A qualified service person must install heater. Follow
all local codes.
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural, do not install heater. Call dealer
where you bought heater for proper type
heater.
INSTALLATION ITEMS
Before installing heater, make sure you have
the items listed below.
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection * (see Figure
12, page 8).
• sediment trap
• tee joint
• pipe wrench
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Purchase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessory, page 15.
LOCATING HEATER
This heater is designed to be mounted on a
wall.
WARNING: Maintain the mini-
mum clearances shown in Figure
4. If you can, provide greater clearances from floor, ceiling, and joining wall.
WARNING: Never install the
heater
• in a bathroom (VN10 only)
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36 inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
CAUTION: This heater creates warm air currents. These
currents move heat to wall surfaces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities in the air (such
as tobacco smoke) exist, may
discolor walls.
Minimum To
Top Surface
Of Carpeting,
Tile or Other
Combustible
Material
Figure 4 - Mounting Clearances As Viewed
From Front of Heater
INSTALLING HEATER TO
WALL
Marking Screw Locations
1. Determine where you will locate heater.
WARNING: Maintain minimum
clearances shown in Figure 5. If
you can, provide greater clearances from floor and joining wall.
IMPORTANT:
Vent-free heaters add moisture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilation air may cause mildew to form
from too much moisture. See Air for Com-
bustion and Ventilation, pages 3 through 5.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
• locate heater where moving
vehicle will not hit it
For convenience and efficiency, install heater
• where there is easy access for operation, inspection, and service
• in coldest part of room
6
2. Mark two mounting screw locations on
wall (see Figure 5).
10 7/8"
Minimum To
Maintain 8"
Clearance
From Wall
JOINING WALL
Figure 5 - Mounting Screw Locations
7 3/4"
Mounting
Screw
Locations
FLOOR
20 1/4"
Minimum To
Maintain 3"
Clearance
From Floor
101851
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