®
VENT-FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Models: VN1800C, VN1800IT, VN3000C, and VN2550IT
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.
®
Save this manual for future reference.
CONTENTS
SECTION PAGE
Safety Information......................................................................... 2
Product Identification .................................................................... 4
Local Codes ................................................................................... 4
Unpacking......................................................................................4
Product Features ............................................................................ 4
Fresh Air For Combustion And Ventilation .................................. 5
Installing To Wall.......................................................................... 9
Connecting To Gas Supply............................................................14
Checking Gas Connections............................................................15
Operating Heater (Models VN1800IT & VN2550IT)...................17
Operating Heater (Models VN1800C & VN3000C)..................... 21
Inspecting Burner .......................................................................... 24
Cleaning And Maintenance ........................................................... 26
Troubleshooting.............................................................................26
Technical Service .......................................................................... 30
Specifications ................................................................................ 30
Service Publications ...................................................................... 30
Service Hints ................................................................................. 30
Replacement Parts ......................................................................... 31
Accessories ....................................................................................31
Illustrated Parts Breakdown and Parts List ................................... 32-39
Warranty Information .................................................................... Back Cover
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, electrical shock, and carbon monoxide poisoning.
DANGER
WARNING ICON G 001
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.
2
Safety Information continues on next page
100750
SAFETY
WARNING ICON G 001
WARNINGS
Continued
INFORMATION
Continued
WARNING: Any change to this heater or its controls can be dangerous.
1. Use only natural gas. Do not convert heater to use different fuel type.
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. This heater shall not be installed in a bedroom or 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 plaque control knob at the 1, 2, 3, or 4 locked positions. Never set control knob between locked positions. Poor combustion and
higher levels of carbon monoxide 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 Fresh Air for
Combustion and Ventilation, pages 5 through 8.
7. Never run heater in small, closed room. Open door into next room to help
ventilate.
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 and unplug heater and let cool before servicing. Only a qualified
service person should service and repair heater.
16. Operating heater above elevations of 4,500 feet may cause pilot outage.
3
100750
PRODUCT
IDENTIFICATION
Thermostat Control Knob (Models VN1800IT and VN2550IT Only)
Piezo Ignitor (Models VN1800IT
and VN2550IT Only)
Front
Panel
Figure 1 - Vent-Free Natural Gas Heater (Model VN2550IT Shown)
Control Knob
Grill
Guard
Burners
Heater
Cabinet
LOCAL CODES
UNPACKING
PRODUCT
FEATURES
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
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.
Safety Device
This heater has a pilot with an Oxygen Depletion Sensor Shutoff System (ODS).
The ODS/pilot is a required feature for vent-free 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.
Thermostatic Heat Control
(Models VN1800IT and VN2550IT Only)
This heater has a thermostat sensing bulb and thermostat control. This results in the
greatest heater comfort. This can also result in lower gas bills.
4
100750
FRESH AIR
WARNING
FOR
COMBUSTION
AND
VENTILA TION
This heater must have fresh air for proper operation. If not, poor
fuel combustion could result. 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 fuel-burning appliances.
PRODUCING ADEQUATE 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 5 through 8 will help you classify your space and provide
adequate ventilation.
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 continu-
ous water vapor retarder with a rating of one perm or less with open-
ings gasketed or sealed
b. weather stripping has been added on openable windows and doors
c. caulking or sealants are applied 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
If your home does not meet all of the three criteria above, continued reading.
Ventilation Air From Outdoors
and
, page 8
and
.
Unconfined Space
An unconfined space has a minimum air volume of 50 cubic feet for each 1000
BTU/Hr input rating of all appliances in the space (cubic feet equals length x
width x height of space). Include adjoining rooms only if there are doorless
passageways or ventilation grills between the rooms.
100750
Confined Space
A confined space has an air volume of less than 50 cubic feet for each 1000
BTU/Hr input rating of all appliances in the space (cubic feet equals length x
width x height of space). Include adjoining rooms only if there are doorless
passageways or ventilation grills between the rooms.
Continued
5
FRESH AIR
FOR
COMBUSTION
AND
VENTILA TION
Continued
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:
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:
BTU/Hr the space can support)
3. Add the BTU/Hr of all fuel burning appliances in the space.
Example:
* Do not include direct-vent gas appliances. 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 an adjoining room. If the extra space provides
an unconfined space, remove door to adjoining room or add ventilation grills between
rooms. See Ventilation Air From Inside Building, page 7.
B. Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 8.
C. Install a lower BTU/Hr heater, if lower BTU/Hr size makes room unconfined.
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.
Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) =
2560 cu. ft. (volume of space)
2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum
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
Gas water heater 40,000 BTU/Hr
Vent-free heater + 18,000 BTU/Hr
Total = 58,000 BTU/Hr
51,200 BTU/Hr (maximum the space can support)
58,000 BTU/Hr (actual amount of BTU/Hr used)
WARNING
6
You must provide additional ventilation air in a confined space.
100750
FRESH AIR
FOR
COMBUSTION
AND
VENTILATION AIR
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).
VENTILA TION
Continued
WARNING
Rework worksheet, adding the space of the adjoining unconfined
space.
appliances in both spaces.
into Adjoining
The combined spaces must have enough fresh air to supply all
12"
Ventilation Grills
Ventilation
Grills
Room,
Option 1
Or
Remove
Door into
Adjoining
Room,
Option 3
Into Adjoining Room,
Option 2
100750
12"
Figure 2 - Ventilation Air from Inside Building
Continued
7
FRESH AIR
FOR
COMBUSTION
AND
VENTILA TION
Continued
VENTILATION AIR
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. 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.
IMPORTANT:
thermostat-controlled power vent. Heated air entering the attic will activate the power vent.
Do not provide openings for inlet or outlet air into attic if attic has a
(Continued)
Outlet
Air
Inlet
Air
Outlet
Air
Inlet Air
Figure 3 - Ventilation Air from Outdoors
Ventilated
Attic
Ventilated
Crawl Space
To Attic
To
Crawl
Space
8
100750
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 gas)
• manual shutoff valve *
* 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 Accessories, page 31.
• ground joint union
• test gauge connection *
(see Figure 13, page 15)
LOCATING HEATER
This heater is designed to be mounted on a wall.
WARNING
WARNING ICON G 001
Maintain the minimum clearances shown in Figure 4 (page 10). If you
can, provide greater clearances from floor, ceiling, and joining wall.
• sediment trap
• tee joint
• pipe wrench
You can locate heater on floor, away from a wall. An optional floor mounting stand is
needed. Purchase the floor mounting stand from your dealer. See Accessories, page 31.
Never install the heater
• in a bedroom or bathroom
• 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
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
WARNING
WARNING ICON G 001
CAUTION
WARNING ICON G 001
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.
100750
IMPORTANT:
stalling heater in rooms without enough ventilation air may cause mildew to form from
too much moisture. See Fresh Air for Combustion and Ventilation, pages 5 through 8.
Vent-free heaters add moisture to the air. Although this is beneficial, in-
Continued
9
INSTALLING
TO WALL
For convenience and efficiency, install heater
• where there is easy access for operation, inspection, and service
• in coldest part of room
Continued
An optional fan kit is available from your dealer. See Accessories, page 31. If
planning to use fan, locate heater near an electrical outlet.
CEILING
36"
8"
Minimum
From
Sides Of
Heater
Left
Side
FLOOR
Figure 4 - Mounting Clearances As Viewed From Front of Heater
Minimum
Right
Side
3"
Minimum To Top Surface
Of Carpeting, Tile Or Other
Combustible Material
THERMOSTAT SENSING BULB
(Models VN1800IT and VN2550IT Only)
The thermostat sensing bulb has been placed inside the heater for protection during
shipping.
Locating Thermostat Sensing Bulb
1. Remove front panel of heater (see Figure 7, page 11).
2. Locate thermostat sensing bulb just under the burner assembly.
IMPORTANT:
operation.
Attaching Thermostat Sensing Bulb
1. Remove thermostat sensing bulb from holders inside heater. Route through slot
opening in bottom of heater.
2. Place clamp on thermostat sensing bulb as shown in Figure 5. Clamp is provided in hardware package.
3. Snap clamp into upper mounting hole as shown in Figure 5. Mounting hole is
located on lower left edge on back of heater. Make sure the thermostat sensing
bulb is pointing up.
Attach thermostat sensing bulb to the back of heater for proper
Thermostat
Sensing Bulb
Clamp
10
Figure 5 - Attaching Thermostat Sensing Bulb
100750
INSTALLING
TO WALL
Continued
INSTALLING HEATER TO WALL
Mounting Bracket
The mounting bracket is located on back panel of heater. It has been taped there for
shipping. Remove mounting bracket from back panel.
Mounting
Bracket
Figure 6 - Mounting Bracket Location
Removing Front Panel Of Heater
1. Remove two screws near bottom corners of front panel.
2. Lift straight up on grill guard until it stops. Grill guard will slide up about 1/4".
3. Pull bottom of front panel forward, then down.
100750
Figure 7 - Removing Front Panel Of Heater
Methods For Attaching Mounting Bracket To Wall
Only use last hole on each end of mounting bracket to attach bracket to wall. These
two holes are 16 inches apart from their centers. Attach mounting bracket to wall in
one of two ways.
1. Attaching to wall stud
2. Attaching to wall anchor
Attaching to wall stud This method provides the strongest hold. Insert mounting
screws through mounting bracket and into wall studs.
Attaching to wall anchor This method allows you to attach mounting bracket to
hollow walls (wall areas between studs) or to solid walls (concrete or masonry).
Decide which method better suits your needs. Either method will provide a secure
hold for the mounting bracket.
Continued
11
INSTALLING
TO WALL
Marking Screw Locations
1. Tape mounting bracket to wall where heater will be located. Make sure mounting
bracket is level.
Continued
WARNING
WARNING ICON G 001
Maintain minimum clearances shown in Figure 8. If you can, provide greater clearances from floor and joining wall.
2. Mark screw locations on wall (see Figure 8).
Note:
Only mark last hole on each end of mounting bracket. Insert mounting
screws through these holes only.
3. Remove tape and mounting bracket from wall.
13"
Min.
Only Insert Mounting
Screws Through Last
Hole On Each End
Adjoining Wall
Models VN3000C and VN2550IT Models VN1800C and VN1800IT
16"
18 3/4"
Min.
Floor
9 1/4"
Min.
Only Insert Mounting
Screws Through Last
Hole On Each End
Adjoining Wall
16"
Floor
18 3/4"
Min.
Figure 8 - Mounting Bracket Clearances
Attaching Mounting Bracket To Wall
Note:
Wall anchors, mounting screws, and spacers are in hardware package. The
hardware package is provided with heater.
Attaching to wall stud method
For attaching mounting bracket to wall studs
1. Drill holes at marked locations using 9/64" drill bit.
2. Place mounting bracket onto wall. Line up last hole on each end of bracket with
holes drilled in wall.
3. Insert mounting screws through bracket and into wall studs.
4. Tighten screws until mounting bracket is firmly fastened to wall studs.
Attaching to wall anchor method
For attaching mounting bracket to hollow walls (wall areas between studs) or solid
walls (concrete or masonry)
1. Drill holes at marked locations using 5/16" drill bit. For solid walls (concrete or
masonry), drill at least 1" deep.
2. Fold wall anchor as shown in Figure 9.
12
Figure 9 - Folding Anchor
3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall.
100750
INSTALLING
TO WALL
Continued
4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to
“pop” open anchor wings.
For thick walls (over 1/2" thick) or solid walls, do not pop open wings.
Figure 10 - Popping Open Anchor Wings For Thin Walls
5. Place mounting bracket onto wall. Line up last hole on each end of bracket with
wall anchors.
6. Insert mounting screws through bracket and into wall anchors.
7. Tighten screws until mounting bracket is firmly fastened to wall.
Placing Heater On Mounting Bracket
1. Locate two horizontal slots on back panel of heater.
2. Place heater onto mounting bracket. Slide horizontal slots onto stand-out tabs on
mounting bracket.
IMPORTANT:
Do not hammer key!
Horizontal Slots
Stand-Out Tab
Figure 11 - Mounting Heater Onto Mounting Bracket
Installing Bottom Mounting Screws
1. Locate two bottom mounting holes. These holes are near bottom on back panel
of heater (see Figure 14).
2. Mark screw locations on wall.
3. Remove heater from mounting bracket.
4. If installing bottom mounting screws into hollow or solid wall, install wall
anchors. Follow steps 1 through 4 under Attaching To Wall Anchor Method,
page 12.
If installing bottom mounting screw into wall stud, drill holes at marked locations using 9/64" drill bit.
5. Replace heater onto mounting bracket.
6. Place spacers between bottom mounting holes and wall anchor or drilled hole.
7. Hold spacer in place with one hand. With other hand, insert mounting screw
through bottom mounting hole and spacer. Place tip of screw in opening of wall
anchor or drilled hole.
8. Tighten both screws until heater is firmly secured to wall. Do not over tighten.
Note:
Do not replace front panel at this time. Replace front panel after making
gas connections and checking for leaks (see pages 14-16).
Mounting Bracket
(attached to wall)
100750
Figure 12 - Installing Bottom Mounting Screws
13
CONNECTING
TO GAS
SUPPLY
NOTICE
A qualified service person must connect heater to gas supply.
Follow all local codes.
WARNING
WARNING ICON G 001
Never connect heater to private (non-utility) gas wells. This gas is
commonly known as well-head gas.
IMPORTANT:
pressure must be no greater than 14 inches of water. If gas line pressure is higher,
heater regulator damage could occur.
Use only new, black iron or steel pipe. Internally-tinned copper
tubing may be used in certain areas. Check your local codes. Use
pipe of large enough diameter to allow proper gas volume to heater.
If pipe is too small, undue loss of pressure will occur.
Installation must include a manual shutoff valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge hook up. NPT tap must be upstream
from heater (see Figure 13, page 15).
Apply pipe joint sealant lightly to male threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe could result in clogged heater valves.
Check gas line pressure before connecting heater to gas line. Gas line
CAUTION
WARNING ICON G 001
Typical Pipe Diameters
VN1800C or VN1800IT 3/8" or greater
VN3000C or VN2550IT 1/2" or greater
14
CAUTION
WARNING ICON G 001
Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown in Figure 13, page 15. Locate sediment
trap where it is within reach for cleaning. Locate sediment trap where trapped
matter is not likely to freeze. A sediment trap traps moisture and contaminants. This
keeps them from going into heater controls. If sediment trap is not installed or is
installed wrong, heater may not run properly.
100750
CONNECTING
TO GAS
SUPPLY
Continued
IMPORTANT:
and/or fittings.
Pressure
Regulator
Regulator
Bracket
Heater
Cabinet
Hold pressure regulator with wrench when connecting it to gas piping
1/2" NPT
Pipe Nipple
Ground Joint
Union
Tee Joint
CHECKING
GAS
CONNECTIONS
Test
Gauge
Connection *
Sediment
Trap
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Tee Joint
Pipe
Nipple
Cap
Manual
Shutoff
Valve *
From
Gas Meter
(7" W.C. to 10.5" W.C. Pressure)
3" Minimum
Figure 13 - Gas Connection
* 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 Accessories, page 31.
WARNING
WARNING ICON G 001
Test all gas piping and connections for leaks after installing or
servicing. Correct all leaks at once.
100750
WARNING
WARNING ICON G 001
Never use an open flame to check for a leak. Apply a mixture of
liquid soap and water to all joints. Bubbles forming show a leak.
Correct all leaks at once.
PRESSURE TESTING GAS SUPPLY PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
1. Disconnect heater and its individual manual shutoff valve from gas supply
piping system. Pressures in excess of 1/2 PSIG will damage heater regulator.
2. Cap off open end of gas pipe where manual shutoff valve was connected.
3. Pressurize supply piping system by either using compressed air or
opening main gas valve located on or near gas meter.
Continued
15
CHECKING
GAS
4. Check all joints of gas supply piping system. Apply mixture of liquid soap and
water to gas joints. Bubbles forming show a leak.
5. Correct all leaks at once.
CONNECTIONS
Continued
Test Pressures Equal To or Less Than 1/2 PSIG
1. Close manual shutoff valve (see Figure 14).
2. Pressurize supply piping system by either using compressed air or opening main
gas valve located on or near gas meter.
3. Check all joints from gas meter to manual shutoff valve (see Figure 15). Apply
mixture of liquid soap and water to gas joints. Bubbles forming show a leak.
4. Correct all leaks at once.
PRESSURE TESTING HEATER GAS CONNECTIONS
1. Open manual shutoff valve (see Figure 14).
2. Open main gas valve located on or near gas meter.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from manual shutoff valve to control valve (see Figure 15).
Apply mixture of liquid soap and water to gas joints. Bubbles forming show a
leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 17 through 24). Check the rest of the
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 20 [models VN1800IT
and VN2550IT] or page 24 [models VN1800C and VN3000C]).
8. Replace front panel.
Manual
Shutoff
Valve
Gas Meter
ON
Open
POSITION
OFF
POSITION
Closed
Figure 14 - Manual Shutoff Valve
Control Valve Location
Manual
Shutoff
Valve
16
Figure 15 - Checking Gas Joints
100750
OPERATING
HEATER
Models VN1800IT
and VN2550IT
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
WARNING ICON G 001
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal
injury or loss of life.
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 floor because some gas is heavier than air and will
settle on the floor.
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.
• If you cannot reach your gas supplier, call the fire 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 qualified service technician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately
call a qualified service technician to inspect the appliance and to replace
any part of the control system and any gas control which has been under
water.
100750
Continued
17
OPERATING
C-clockwise
LIGHTING INSTRUCTIONS
HEATER
Models VN1800IT
and VN2550IT
Continued
1. STOP! Read the safety information at the top of page 17.
2. Make sure manual shutoff valve is fully open.
3. Turn thermostat control knob on left side of heater clockwise
Clockwise
to the
OFF position.
Thermostat Control Knob
LO
PILOT
OFF
HI
Figure 16 - Thermostat Control Knob In The OFF Position
Ignitor Button
3
IGNITOR
Plaque Control Knob
1
2
4
4. Wait five minutes to clear out any gas. Then smell for gas, including near
the floor. If you smell gas, STOP! Follow “B” in the safety information at
the top of page 17. If you don’t smell gas, go to the next step.
5. Turn thermostat control knob on left side of heater counterclockwise
to the PILOT position. Press in thermostat control knob for 5
seconds.
Note:
You may be running this heater for the first time after hooking up
to gas supply. If so, you may need to press in thermostat control knob for
30 seconds. This will allow air to bleed from the gas system.
• If thermostat control knob does not pop up when released, contact a
qualified service person or gas supplier for repairs.
6. Keep thermostat control knob pressed in while pushing down and releasing
the ignitor button. This will light pilot. If necessary, continue to press
ignitor button until pilot lights.
If pilot does not light
• turn thermostat control knob clockwise
to the OFF position
Clockwise
• repeat steps 5 and 6
If pilot does not stay lit after several tries
• refer to Troubleshooting, pages 26 through 29
• contact a qualified service person or gas supplier
Until repairs are made, light pilot with match. To light pilot with match, see
Manual Lighting Procedure, page 20
7. Keep thermostat control knob pressed in for 30 seconds after lighting pilot.
After 30 seconds, release control knob.
Note:
If pilot goes out, repeat steps 3 through 7. This heater has a safety
interlock system. Wait one minute before lighting pilot again.
8. Turn thermostat control knob counterclockwise
to the desired
C-clockwise
heating level. The plaque directly above the pilot should light.
18
100750
WARNING ICON G 001
OPERATING
HEATER
Models VN1800IT
and VN2550IT
Continued
Thermocouple
Ignitor Electrode
Pilot Burner
Figure 17 - Pilot
TO SELECT HEATING LEVEL
WARNING
WARNING ICON G 001
When running heater, set control knob at the 1, 2, 3, or 4
locked positions. Never set control knob between locked
positions. Poor combustion and higher levels of carbon
monoxide may result.
CAUTION
Do not try to adjust heating levels by using the manual shutoff
valve.
1. Slightly press in plaque control knob on right side of heater and turn
counterclockwise
IMPORTANT:
C-clockwise
to the desired position.
Release downward pressure while turning control knob.
Control knob will lock at the desired position.
2. Turn thermostat control knob on left side of heater to any setting between
Note:
LO and HI.
When burners cycle on, or from LO to HI, a “click” will
be heard. When the burners light, a “whoosh” noise will be heard.
Control
Knob VN1800IT VN2550IT
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
100750
4
Figure 18 - Burner Patterns
Continued
19
OPERATING
TO TURN OFF GAS TO APPLIANCE
HEATER
Models VN1800IT
and VN2550IT
Continued
Shutting Off Heater
1. Turn thermostat control knob clockwise
2. Turn off all electric power to the appliance if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
1. Turn thermostat control knob clockwise
to the OFF position.
Clockwise
to the PILOT position.
Clockwise
THERMOSTAT OPERATION
(Models VN1800IT and VN2550IT Only)
Since the thermostat measures the temperature of air near the heater cabinet,
this may not always agree with room temperature (depending on housing
construction, installation location, room size, open air temperatures, etc.).
Frequent operation of your heater will enable you to determine your own
comfort levels.
MANUAL LIGHTING PROCEDURE
1. Follow steps 1 through 5 under Lighting Instructions, page 18.
2. With thermostat control knob pressed in, strike match. Hold match to pilot
until pilot lights.
3. Keep thermostat control knob pressed in for 30 seconds after lighting pilot.
After 30 seconds, release control knob.
20
100750
OPERATING
Clockwise
HEATER
Models VN1800C
and VN3000C
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
WARNING ICON G 001
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal
injury or loss of life.
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 floor because some gas is heavier than air and will
settle on the floor.
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.
• If you cannot reach your gas supplier, call the fire 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 qualified service technician or gas supplier. Force or attempted
repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately
call a qualified service technician to inspect the appliance and to replace
any part of the control system and any gas control which has been under
water.
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above.
2. Make sure manual shutoff valve is fully open.
3. Turn control knob clockwise
PILOT
IGN
LOW
to the OFF position.
OFF
MED
HIGH
Control Knob
100750
Figure 19 - Control Knob In The OFF Position
Continued
21
Clockwise
OPERATING
HEATER
4. Wait five minutes to clear out any gas. Then smell for gas, including near
the floor. If you smell gas, STOP! Follow “B” in the safety information at
the top of page 21. If you don’t smell gas, go to the next step.
Models VN1800C
and VN3000C
Continued
5. Press in control knob.
Note:
You may be running this heater for the first time after hooking up
to gas supply. If so, you may need to press in control knob for 30 seconds.
This will allow air to bleed from the gas system.
• If control knob does not pop up when released, contact a qualified
service person or supplier for repairs.
6. Keep control knob pressed in and turn it counterclockwise
C-clockwise
to the
PILOT/IGN position. This will light pilot.
Note:
You will hear a loud “click” when the control knob reaches the
PILOT/IGN position.
If pilot does not light
• turn control knob clockwise
to the OFF position
• repeat steps 5 and 6
If pilot does not stay lit after several tries
• refer to Troubleshooting, pages 26 through 29
• contact a qualified service person or gas supplier
Until repairs are made, light pilot with match. To light pilot with match, see
Manual Lighting Procedure, page 24.
Ignitor Electrode
Thermocouple
Figure 20 - Pilot
Pilot Burner
7. Keep control knob pressed in for 30 seconds after lighting pilot. After 30
seconds, release control knob.
Note:
If pilot goes out, repeat steps 3 through 7.
22
Continued
100750
OPERATING
HEATER
Models VN1800C
and VN3000C
Continued
TO SELECT HEATING LEVEL
WARNING
WARNING ICON G 001
When running heater, set control knob at LOW, MEDIUM, or
HIGH locked positions. Never set control knob between
locked positions. Poor combustion and higher levels of
carbon monoxide may result.
CAUTION
WARNING ICON G 001
Do not try to adjust heating levels by using the manual
shutoff valve.
1. Slightly press in control knob and turn counterclockwise
LOW, MEDIUM, or HIGH positions.
IMPORTANT:
Release downward pressure while turning control knob.
Control knob will lock at the desired position.
Control
Knob VN1800C VN3000C
OFF
PILOT
IGN
LOW
OFF
PILOT
IGN
MED
OFF
PILOT
IGN
C-clockwise
to the
LOW
MED
HIGH
100750
HIGH
OFF
OFF
Figure 21 - Burner Patterns
Continued
23
OPERATING
Clockwise
Clockwise
TO TURN OFF GAS TO APPLIANCE
HEATER
Models VN1800C
and VN3000C
Continued
INSPECTING
BURNER
Shutting Off Heater
1. Turn control knob clockwise
2. Turn off all electric power to the appliance if service is to be performed.
Shutting Off Burner Only (pilot stays lit)
1. Turn control knob clockwise
to the OFF position.
to the PILOT position.
MANUAL LIGHTING PROCEDURE
1. Follow steps 1 through 5 under Lighting Instructions, pages 21 and 22.
2. With control knob pressed in, strike match. Hold match to pilot until pilot
lights.
3. Keep control knob pressed in for 30 seconds after lighting pilot. After 30
seconds, release control knob.
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 22 shows a correct pilot flame pattern. Figure 23 shows an incorrect pilot
flame pattern. The incorrect pilot flame is not touching the thermocouple. This will
cause the thermocouple to cool. When the thermocouple cools, the heater will shut
down.
Pilot Burner
Thermocouple
Figure 22 - Correct Pilot Flame Pattern
Thermocouple
Figure 23 - Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 23
• turn heater off (see To Turn Off Gas to Appliance, page 20 [models VN1800IT
and VN2550IT] or page 24 [models VN1800C and VN3000C])
• see Troubleshooting, pages 24 through 29
GRH/OV 009GOOD PILOT
Pilot Burner
GRH/OV 010BAD PILOT
24
100750
INSPECTING
BURNER
Continued
BURNER FLAME PATTERN
Figure 24 shows a correct burner flame pattern. Figure 25 shows an incorrect
Correct Burner Pattern-Plaque
Figure 24 - Correct Burner Flame Pattern
Figure 25 - Incorrect Burner Flame Pattern
burner flame pattern.
If burner flame pattern is incorrect, as shown in Figure 25
• turn heater off (see To Turn Off Gas to Appliance, page 20 [models
VN1800IT and VN2550IT] or page 24 [models VN1800C and VN3000C])
• see Troubleshooting, pages 26 through 29
GRH/OV 018
100750
25
CLEANING
AND
MAINTENANCE
WARNING
WARNING ICON G 001
Turn off heater and let cool before cleaning.
CAUTION
WARNING ICON G 001
You must keep control areas, burner, and circulating air
passageways of heater clean. Inspect these areas of heater before
each use. Have heater inspected yearly by a qualified service
person. Heater may need more frequent cleaning due to excessive
lint from carpeting, bedding material, etc.
ODS/PILOT AND BURNER ORIFICE
• Use a vacuum cleaner, pressurized air, or small, soft bristled brush to clean.
CABINET
Air Passageways
• Use a vacuum cleaner or pressurized air to clean.
Exterior
• Use a soft cloth dampened with a mild soap and water mixture. Wipe the
cabinet to remove dust.
TROUBLE-
SHOOTING
Note:
All troubleshooting
items are listed in order of
operation.
26
WARNING
WARNING ICON G 001
Turn off and unplug heater and let cool before servicing. Only a
qualified service person should service and repair heater.
CAUTION
WARNING ICON G 001
Never use a wire, needle, or similar object to clean ODS/pilot. This
can damage ODS/pilot unit.
OBSERVED
PROBLEM
When control knob is
pressed in and turned
to the PILOT/IGN
position, there is no
spark at ODS/pilot
(non-thermostat
models only).
When ignitor button is
pressed in, there is no
spark at ODS/pilot
(thermostat models
only).
POSSIBLE
CAUSE
1. Ignitor electrode positioned wrong.
2. Ignitor electrode broken.
3. Ignitor electrode not
connected to ignitor
cable.
4. Ignitor cable pinched or
wet.
5. Broken ignitor cable.
6. Bad piezo ignitor.
7. Piezo ignitor nut is loose
(Thermostat models
only).
REMEDY
1. Replace ignitor.
2. Replace ignitor.
3. Reconnect ignitor cable.
4. Free ignitor cable if
pinched by any metal or
tubing. Keep ignitor cable
dry.
5. Replace ignitor cable.
6. Replace control valve
(piezo is part of control
valve).
7. Tighten nut holding piezo
ignitor. Nut is located
inside heater cabinet at
top.
100750
TROUBLE-
SHOOTING
Continued
OBSERVED
PROBLEM
When control knob is
pressed in and turned
to the PILOT/IGN
position, there is spark
at ODS/pilot but no
ignition (non-thermostat model only).
When ignitor button is
pressed in, there is a
spark at ODS/pilot but
no ignition (thermostat models only).
POSSIBLE
CAUSE
1. Gas supply turned off or
manual shutoff valve
closed.
2. Control knob not fully
pressed in while being
turned to PILOT/IGN
position (non-thermostat
models only).
Thermostat control knob
not fully pressed in while
pressing ignitor button
(thermostat models only).
3. Air in gas lines when
installed.
4. ODS/pilot is clogged.
5. Gas regulator setting is
not correct.
6. Thermostat control knob
not in pilot position
(thermostat models only).
REMEDY
1. Turn on gas supply or
open manual shutoff
valve.
2. Fully press in control
knob while turning to PILOT/IGN position (nonthermostat models only).
Fully press in thermostat
control knob while pressing ignitor button (thermostat models only).
3. Continue holding down
control knob. Repeat
igniting operation until
air is removed.
4. Clean ODS/pilot (see
Cleaning and Maintenance, page 26) or
replace ODS/pilot
assembly.
5. Replace gas regulator.
6. Turn thermostat control
knob to pilot position.
ODS/pilot lights but
flame goes out when
control knob is
released
1. Control knob not fully
pressed in.
2. Control knob not pressed
in long enough.
3. Manual shutoff valve not
fully open.
4. Thermocouple connection
loose at control valve.
5. Pilot flame not touching
thermocouple, which
allows thermocouple to
cool, causing pilot flame
to go out. This problem
could be caused by one or
both of the following:
A) Low gas pressure
B) Dirty or partially
clogged ODS/pilot
6. Thermocouple damaged.
7. Control valve damaged.
8. Safety interlock system
has been triggered
(thermostat models only).
1. Press in control knob
fully.
2. After ODS/pilot lights,
keep control knob
pressed in 30 seconds.
3. Fully open manual shutoff valve.
4. Hand tighten until snug,
then tighten 1/4 turn
more.
5. A) Contact local natural
gas company.
B) Clean ODS/pilot (see
Cleaning and Maintenance, page 26) or
replace ODS/pilot
assembly.
6. Replace thermocouple.
7. Replace control valve.
8. Wait one minute for
safety interlock system
to reset. Repeat ignition
operation.
100750
Continued
27
TROUBLE-
SHOOTING
Continued
OBSERVED
PROBLEM
Burner(s) does not
light after ODS/pilot is
lit.
POSSIBLE
CAUSE
1. Burner orifice(s) is
clogged.
2. Burner orifice(s)
diameter is too small.
3. Inlet gas pressure is too
low.
REMEDY
1. Clean burner orifice(s)
(see Cleaning and
Maintenance, page 26) or
replace burner orifice(s).
2. Replace burner orifice(s).
3. Contact local natural gas
company.
Delayed ignition of
burner(s)
Burner backfiring
during combustion.
Burner plaque(s) does
not glow.
Slight smoke or odor
during initial operation
1. Manifold pressure is too
low.
2. Burner orifice(s) is
clogged.
1. Burner orifice(s) is
clogged or damaged.
2. Burner damaged.
3. Gas regulator defective.
1. Plaque damaged
2. Inlet gas pressure is too
low.
3. Control knob set between locked positions.
1. Residues from manufacturing processes.
1. Contact local natural gas
company.
2. Clean burner orifice(s)
(see Cleaning and
Maintenance, page 26) or
replace burner orifice(s).
1. Clean burner orifice(s)
(see Cleaning and
Maintenance, page 26) or
replace burner orifice(s).
2. Replace burner.
3. Replace gas regulator.
1. Replace burner.
2. Contact local natural gas
company.
3. Turn control knob until it
locks at desired setting.
1. Problem will stop after a
few hours of operation.
28
Heater produces a
clicking/ticking noise
just after burner is lit or
shut off.
1. Metal expanding while
heating or contracting
while cooling.
1. This is common with
most heaters. If noise is
excessive, contact
qualified service person.
100750
TROUBLE-
SHOOTING
Continued
WARNING
WARNING ICON G 001
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.
IMPORTANT:
Cleaning supplies, paint, paint remover, cigarette smoke, cements and glues, new
carpet or textiles, etc., create fumes. These fumes may mix with combustion air and
create odors.
OBSERVED
PROBLEM
Heater produces
unwanted odors.
Heater shuts off in
use (ODS operates).
Operating heater where impurities in air exist may create odors.
POSSIBLE
CAUSE
1. Heater burning vapors
from paint, hair spray,
glues, etc. See
PORTANT
above
2. Gas leak. See Warn-
ing statement at
top of page.
1. Not enough fresh air is
available.
2. Low line pressure
3. ODS/pilot is partially
clogged.
IM-
statement
REMEDY
1. Ventilate room. Stop
using odor causing
products while heater is
running.
2. Locate and correct all
leaks (see Checking Gas
Connections, page 15).
1. Open window and/or
door for ventilation.
2. Contact local natural
gas company.
3. Clean ODS/pilot (see
Cleaning and Maintenance, page 26 ).
100750
Gas odor even when
control knob is in
OFF position.
Gas odor during
combustion
1. Gas leak. See Warn-
ing statement at
top of page.
2. Control valve defective.
1. Foreign matter between control valve
and burner.
2. Gas leak. See Warn-
ing statement at
top of page.
1. Locate and correct all
leaks (see Checking
Gas Connections, page
15).
2. Replace control valve.
1. Take apart gas tubing
and remove foreign
matter.
2. Locate and correct all
leaks (see Checking
Gas Connections, page
15).
29
TECHNICAL
SERVICE
You may have further questions about installation, operation, or troubleshooting.
If so, contact DESA International’s Technical Service Department at 1-800-323-
5190.
SPECIFICATIONS
VN1800IT VN2550IT
BTU (Variable) 6,600-18,000 7,000-25,500
Type Gas Natural Only Natural Only
Ignition Piezo Piezo
Pressure Regulator Setting 6" W.C. 6" W.C.
Inlet Gas Pressure (in. of water)
Maximum 10.5" 10.5"
Minimum 7" 7"
Dimensions, Inches (H x W x D)
Heater 23.5 x 18.5 x 8 23.5 x 25.9 x 8
Carton 25.8 x 21.3 x 10.1 25.8 x 28.7 x 10.1
Weight (pounds)
Heater 24 32
Shipping 29 38
VN1800C VN3000C
BTU (Variable) 6,600/12,000/18,000 6,600/18,000/30,000
Type Gas Natural Only Natural Only
Ignition Piezo Piezo
Pressure Regulator Setting 6" W.C. 6" W.C.
Inlet Gas Pressure (in. of water)
Maximum 10.5" 10.5"
Minimum 7" 7"
Dimensions, Inches (H x W x D)
Heater 23.5 x 18.5 x 8 23.5 x 25.9 x 8
Carton 25.8 x 21.3 x 10.1 25.8 x 28.7 x 10.1
Weight (pounds)
Heater 22 30
Shipping 27 36
SERVICE
PUBLICATIONS
SERVICE
HINTS
30
You can purchase a service manual from the address listed on the back page of this
manual. Send a check for $5.00 payable to DESA International.
When gas pressure is too low
• pilot will not stay lit
• burner(s) will have delayed ignition
• heater will not produce specified heat
When gas quality is bad
• pilot will not stay lit
• burner(s) will produce flames and soot
• heater will backfire when lit
You may feel your gas pressure is too low or gas quality is bad. If so, contact your
local natural gas supplier.
100750
REPLACEMENT
PARTS
Note:
Use only original replacement parts. This will protect your warranty coverage
for parts replaced under warranty.
Parts Under Warranty
Contact authorized dealer from whom you purchased this product. If they are
unable to supply original replacement part(s), call DESA International’s Technical
Service Department at 1-800-323-5190 for information.
When contacting your dealer or DESA International, have ready:
• your name
• your address
• model number of your heater
• how heater was malfunctioning
• type of gas used (propane or natural gas)
• purchase date
Usually, we will ask you to return the defective part to the factory.
Parts Not Under Warranty
Contact authorized dealers of this product. If they can’t supply original replacement
part(s), call DESA International’s Parts Department at 1-800-972-7879 for information. When calling DESA International, have ready:
• model number of your heater
• the replacement part number
ACCESSORIES
Purchase these heater accessories from your local dealer. If they can not supply
these accessories, call DESA International’s Parts Department at 1-800-972-7879
or write to the address listed on the back page of this manual for information.
FAN KIT - GA3100 (GA2100A)
For all models. Provides better heat
distribution. Makes heater more efficient.
Complete installation and operating
instructions provided with fan.
FLOOR MOUNTING STAND
Models VN1800C & VN1800IT - GA4000
Models VN3000C & VN2550IT - GA4010
For locating heater on the floor, away from a
wall. Complete installation instructions provided with floor mounting stand.
100750
MANUAL SHUTOFF
VALVE - GA5010
For all models. Manual
shutoff valve with 1/8"
NPT tap.
31
ILLUSTRATED
PARTS
BREAKDOWN
Model VN1800IT
HEATER EXPLODED VIEW
22
21
18
16
20
17
14
11
15
4
8
9
19
10
12
24
6
23
5
3
6
2
1
7
13
23-1
A
B
C
23-15
23-18
23-19
23-11
23-10
23-17
23-4
23-3
23-2
32
ODS/PILOT ASSEMBLY
23-9
23-13
23-16
23-12
BURNER ASSEMBLY
23-5
23-7
23-6
23-14
23-8
100750
PARTS LIST
Model VN1800IT
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under Replacement Parts on page 31 of this manual.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098304-01 Screw, #10 x 3/8" 2
2 098742-13 Front Panel 1
3 098238-01 Grill Guard 1
4 098342-01 Clip-Grill Guard 2
5 098198-03 Apron 1
6 M11084-26 Screw, #10 x 3/8" 9
7 098462-01 Control Rod Assembly 1
8 098457-01 Reflector Assembly 1
9 098867-05 Regulator 1
10 M11084-38 Screw, #8 x 3/8" 2
11 098455-05 Cabinet Assembly 1
12 098324-01 Control Knob 1
13 098325-01 Roll Pin 1
14 097159-01 Piezo Ignitor 1
15 100537-01 Regulator Bracket 1
16 098522-05 Thermostat Gas Valve 1
17 098265-02 Male Elbow 1
18 098264-02 Male Connector 1
19 098271-03 Ignitor Cable 1
20 100614-01 SIT Tube 1
21 100610-01 Inlet Tube 1
22 099211-01 Hex-Head Screw 2
23 See Detail Burner Assembly 1
23-1 099218-01 Burner 1
23-2 098508-01 Valve Retainer Nut 1
23-3 099056-03 Injector 3
23-4 099048-01 Tubing-Valve to Plaque A 1
23-5 099049-01 Tubing-Valve to Plaque B 1
23-6 099057-01 Pressure Tap Fitting 1
23-7 099050-01 Tubing-Valve to Plaque C 1
23-8 100605-01 Control Valve 1
23-9 099387-07 Pilot Tubing-Valve to Regulator 1
23-10 100616-01 Control Valve Tube 1
23-11 099059-05 ODS/Pilot 1
23-12 100609-01 Pilot Tubing - Regulator to Pilot 1
23-13 099918-01 Pilot Regulator 1
23-14 098276-01 Plug, 1/8 1
23-15 100615-01 Male Connector 2
23-16 M11084-26 Screw, #10 x 3/8" 2
23-17 M11084-37 Screw, #8 x 1/4" 3
23-18 098514-01 Thermocouple 1
23-19 098594-01 Ignitor Electrode 1
24 099066-01 Mounting Bracket 1
100750
PARTS AVAILABLE - NOT SHOWN
100619-01 Thermostat Control Position Label 1
100619-02 Control Position Label 1
33
ILLUSTRATED
14
PARTS
BREAKDOWN
Model VN2550IT
HEATER EXPLODED VIEW
3
19
12
24
6
11
16
22
17
18
21
20
5
2
4
8
23
6
15
9
7
13
10
1
23-18
23-19
ODS/PILOT
23-10
23-15
23-11
23-17
23-13
23-9
23-1
A
B
C
D
23-2
23-4
23-3
23-16
23-5
23-14
23-6
23-12
23-20
34
BURNER ASSEMBLY
23-8
23-7
100750
PARTS LIST
Model VN2550IT
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under Replacement Parts on page 31 of this manual.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098304-01 Screw, #10 x 3/8" 2
2 098742-14 Front Panel 1
3 098238-05 Grill Guard 1
4 098342-01 Clip-Grill Guard 2
5 098198-04 Apron 1
6 M11084-26 Screw, #10 x 3/8" 9
7 098462-01 Control Rod Assembly 1
8 098457-05 Reflector Assembly 1
9 098867-05 Regulator 1
10 M11084-38 Screw, #8 x 3/8" 2
11 098698-03 Cabinet Assembly 1
12 098324-01 Control Knob 1
13 098325-01 Roll Pin 1
14 097159-01 Piezo Ignitor 1
15 100537-01 Regulator Bracket 1
16 098522-05 Thermostat Gas Valve 1
17 098265-02 Male Elbow 1
18 098264-02 Male Connector 1
19 098271-03 Cable Ignitor 1
20 100614-01 SIT Tubing 1
21 100610-01 Inlet Tubing 1
22 099211-01 Hex-Head Screw 2
23 See Detail Burner Assembly 1
23-1 099218-03 Burner 1
23-2 098508-01 Valve Retainer Nut 1
23-3 099056-06 Injector 4
23-4 100620-01 Tubing-Valve to Plaque A 1
23-5 100607-01 Tubing-Valve to Plaque B 1
23-6 099057-01 Pressure Tap Fitting 1
23-7 100608-01 Tubing-Valve to Plaque C 1
23-8 100605-02 Control Valve 1
23-9 100616-02 Control Valve Tube 1
23-10 099387-04 Pilot Tubing-Valve to Regulator 1
23-11 099059-05 ODS/Pilot 1
23-12 100609-01 Pilot Tubing-Regulator to Pilot 1
23-13 099918-01 Pilot Regulator 1
23-14 100606-01 Tubing - Valve to Plaque D 1
23-15 100615-01 Male Connector 2
23-16 M11084-37 Screw, #8 x 1/4" 4
23-17 M11084-26 Screw, #10 x 3/8" 2
23-18 098514-01 Thermocouple 1
23-19 098594-01 Ignitor Electrode 1
23-20 098276-01 Plug, 1/8 1
24 099066-01 Mounting Bracket 1
100750
PARTS AVAILABLE - NOT SHOWN
100619-01 Thermostat Control Position Label 1
100619-03 Control Position Label 1
35
ILLUSTRATED
PARTS
BREAKDOWN
Model VN1800C
HEATER EXPLODED VIEW
3
11
10
4
13
5
8
6
15
9
7
16
12
14
6
2
13-1
A
1
B
C
13-16
13-17
13-11
13-15
13-10
13-12
13-4
13-13
13-5
13-14
13-3
13-6
13-18
13-2
13-7
13-8
36
13-9
BURNER ASSEMBLY
ODS/PILOT
100750
PARTS LIST
Model VN1800C
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under Replacement Parts on page 31 of this manual.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098304-01 Screw, #10 x 3/8" 2
2 098742-13 Front Panel 1
3 098238-01 Grill Guard 1
4 098342-01 Clip-Grill Guard 2
5 098198-01 Apron 1
6 M11084-26 Screw, #10 x 3/8" 9
7 098462-01 Control Rod Assembly 1
8 098457-01 Reflector Assembly 1
9 098867-05 Regulator 1
10 M11084-38 Screw, #8 x 3/8" 2
11 098455-02 Cabinet Assembly 1
12 098324-01 Control Knob 1
13 See Detail Burner Assembly 1
13-1 099218-01 Burner 1
13-2 098508-01 Valve Retainer Nut 1
13-3 099056-03 Injector 3
13-4 099048-01 Tubing-Valve to Plaque A 1
13-5 099049-01 Tubing-Valve to Plaque B 1
13-6 099050-01 Tubing-Valve to Plaque C 1
13-7 099057-01 Pressure Tap Fitting 1
13-8 098932-06 Control Valve 1
13-9 099045-01 Pilot Tubing-Valve to Regulator 1
13-10 099051-01 Inlet Tubing 1
13-11 099059-01 ODS/Pilot 1
13-12 M11084-37 Screw, #8 x 1/4" 3
13-13 099047-02 Pilot Tubing-Regulator to Pilot 1
13-14 099918-01 Pilot Regulator 1
13-15 M11084-26 Screw, #10 x 3/8" 2
13-16 098593-01 Thermocouple 1
13-17 098594-01 Ignitor Electrode 1
13-18 098276-01 Plug, 1/8 1
14 099066-01 Mounting Bracket 1
15 100537-01 Regulator Bracket 1
16 098325-01 Roll Pin 1
100750
PARTS AVAILABLE - NOT SHOWN
098465-01 Control Position Label 1
37
ILLUSTRATED
11
PARTS
BREAKDOWN
Model VN3000C
HEATER EXPLODED VIEW
3
10
4
8
13
5
6
2
15
9
7
16
12
14
6
1
13-16
13-17
13-9
13-11
13-15
A
B
13-4
13-5
13-13
C
13-7
D
13-12
13-14
13-1
E
13-2
13-3
13-6
13-18
38
ODS/PILOT
13-8
13-10
BURNER ASSEMBLY
100750
PARTS LIST
Model VN3000C
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under Replacement Parts on page 31 of this manual.
KEY PART
NO. NUMBER DESCRIPTION QTY.
1 098304-01 Screw, #10 x 3/8" 2
2 098742-14 Front Panel 1
3 098238-02 Grill Guard 1
4 098342-01 Clip-Grill Guard 2
5 098198-02 Apron 1
6 M11084-26 Screw, #10 x 3/8" 9
7 098462-01 Control Rod Assembly 1
8 098457-02 Reflector Assembly 1
9 098867-05 Regulator 1
10 M11084-38 Screw, #8 x 3/8" 2
11 098456-02 Cabinet Assembly 1
12 098324-01 Control Knob 1
13 See Detail Burner Assembly 1
13-1 099218-02 Burner 1
13-2 098508-01 Valve Retainer Nut 1
13-3 099056-02 Injector 5
13-4 099052-01 Tubing-Valve to Plaque B & D 1
13-5 099053-01 Tubing-Valve to Plaque C 1
13-6 099057-01 Pressure Tap Fitting 1
13-7 099054-01 Tubing-Valve to Plaque A & E 1
13-8 098932-06 Control Valve 1
13-9 099051-02 Inlet Tubing 1
13-10 099045-01 Pilot Tubing-Valve to Regulator 1
13-11 099059-01 ODS/Pilot 1
13-12 M11084-37 Screw, #8 x 1/4" 5
13-13 099047-02 Pilot Tubing-Regulator to Pilot 1
13-14 099918-01 Pilot Regulator 1
13-15 M11084-26 Screw, #10 x 3/8" 2
13-16 098593-01 Thermocouple 1
13-17 098594-01 Ignitor Electrode 1
13-18 098276-01 Plug, 1/8
14 099066-01 Mounting Bracket 1
15 100537-01 Regulator Bracket 1
16 098325-01 Roll Pin 1
100750
PARTS AVAILABLE - NOT SHOWN
098465-01 Control Position Label 1
39
WARRANTY INFORMATION
KEEP THIS WARRANTY
Model
Serial No.
Date Purchased
Always specify model and serial numbers when communicating with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable is our
standard written warranty. We make no other warranty, expressed or implied.
LIMITED WARRANTY
VANGUARD VENT-FREE NATURAL GAS HEATERS
DESA International warrants this product and any parts thereof, to be free from defects in material and
workmanship for two years from the date of first purchase, provided that the product has been properly installed,
operated, and maintained in accordance with all applicable instructions. To make a claim under this warranty, the
bill of sales or proof of purchase must be presented.
This warranty is extended only to the original retail purchaser. This warranty covers only the cost of parts and labor
required to restore this heater to proper operating condition. Warranty parts must be obtained through authorized
dealers of this product and/or DESA International who will provide original factory replacement parts. Failure to
use original factory replacement parts voids this warranty. The heater must be installed by a qualified installer in
accordance with all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear, or parts
that fail or become damaged as a result of misuse, accidents, lack of proper maintenance, alteration, tampering,
contaminated fuels, or defects caused by improper installation. Travel, transportation, and incidental costs
associated with warranty repairs are not reimbursable under this warranty and are the responsibility of the owner.
To the full extent allowed by the law of the jurisdiction that governs the sale of the product; this express warranty
excludes any and all other expressed warranties and limits the duration of any and all implied warranties, including
warranties of merchantability and fitness for a particular purpose to two years from the date of first purchase; and
DESA International’s liability is hereby limited to the purchase price of the product and DESA International shall
not be liable for any other damages whatsoever including indirect, incidental, or consequential damages.
Some states do not allow a limitation of how long an implied warranty lasts or an exclusion or limitation of incidental
or consequential damages, so the above limitation of implied warranties, or exclusion, or limitation of damages may
not apply to you.
This warranty provides the original retail purchaser with specific legal rights. For specific information regarding
those rights, please consult the applicable state laws.
For information about this warranty write:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
Patent Pending
100750-01
REV. C
5/94
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