®
VENT-FREE NATURAL GAS HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
Models: VN6A and VN12
WARNING: If the information in this manual
is not followed exactly, a fire or explosion
may result causing property damage, per-
sonal injury, or loss of life.
WARNING:Improperinstallation,
adjustment, alteration, service, or
maintenance can cause injury or
property damage. Refer to this
manual for correct installation and
operational procedures. For assis-
tance or additional information
consult a qualified installer, ser-
vice agency, or the gas supplier.
— 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.
• Immediatelycallyourgassupplierfrom
a neighbor’s phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier,
call the fire department.
GAS
®
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
T
Save this manual for future reference.
SAFETY
!
WARNING ICON
G
001
WARNINGS Continued
INFORMATION
1. Use only natural gas. Do not convert heater to use different fuel type.
Continued
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. Never install the heater
• in sleeping quarters or 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
4. Always run heater with control knob at LOW or HIGH locked positions
(VN12) or ON position (VN6A). Never set control knob between locked
positions. Poor combustion and higher levels of carbon monoxide may result.
5. Open window to admit fresh, outside air when using heater. Open window one
or two inches. When used without fresh, outside air, heater may give off
carbon monoxide gas.
6. Never run heater in small, closed room. Open door into next room to help
ventilate.
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. Make sure grill guard is in place before running heater.
13. Do not alter heater or its controls. Any change may create a safety hazard.
14. Do not use heater if any part of heater has been under water.
15. Turn off heater and let cool before servicing. Only a qualified service person
should service and repair heater.
16. Do not operate heater above elevations of 4,500 feet.
3
Control Knob
PRODUCT
IDENTIFICATION
Grill
Guard
Burners
Heater
Cabinet
Front
Panel
Figure 1 - Vent-Free Natural Gas Heater (Model VN12 Shown)
Install and use heater with care. Follow all local codes. In the absence of local
codes, use the latest edition of National Gas Code ANSI Z223.1, also known as
NFPA 54*.
LOCAL CODES
*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.
UNPACKING
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
PRODUCT
FEATURES
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.
4
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 *
• ground joint union
• test gauge connection * (see
Figure 10, page 10)
• 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 21.
LOCATING HEATER
This heater is designed to be mounted on a wall.
!
WARNING
WARNING ICON
G
001
Maintain the minimum clearances shown in Figure 2 (page 6). If you
can, provide greater clearances from floor, ceiling, and joining wall.
!
WARNING
WARNING ICON
G
001
Never install the heater
• in sleeping quarters, a mobile home, or 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
WARNING ICON
G
001
Operating heater where impurities in the air (such as tobacco
smoke) exist, may discolor walls.
!
CAUTION
WARNING ICON
G
001
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
Continued
5
CEILING
36"
Minimum
8"
Minimum
From
Sides Of
Heater
Right
Side
Left
Side
3"
Minimum To Top Surface
Of Carpeting, Tile Or Other
Combustible Material
FLOOR
Figure 2 - Mounting Clearances As Viewed From Front of Heater
INSTALLING HEATER TO WALL
Marking Screw Locations
1. Determine where you will locate heater.
!
WARNING
WARNING ICON
G
001
Maintain minimum clearances shown in Figure 3. If you can,
provide greater clearances from floor and joining wall.
2. Mark two mounting screw locations on wall (see Figure 3).
10 7/8"
7 3/4"
Minimum To
Maintain 8"
Clearance
From Wall
Mounting
Screw
Locations
20 1/4"
Minimum To
Maintain 3"
Clearance
From Floor
FLOOR
Figure 3 - Mounting Screw Locations
6
Installing Two Mounting Screws
Note: Wall anchors and mounting screws are in hardware package. The hardware
package is provided with heater.
Attaching to wall stud method
For attaching mounting screw to wall stud
1. Drill hole at marked location using 9/64" drill bit.
2. Insert mounting screw into wall stud.
3. Tighten screw until 1/16" space (thickness of penny) is between screwhead and
wall.
Attaching to wall anchor method
Follow instructions below to attach mounting screws 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 1/4" deep.
2. Fold wall anchor (see Figure 4).
Figure 4 - Folding Anchor
3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall.
4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to
“pop” open anchor wings (see Figure 5). IMPORTANT: Do not hammer key!
For thick walls (over 1/2" thick) or solid walls, do not pop open wings.
Thin Walls
(1/4" to 1/2" thick)
Figure 5 - Popping Open Anchor Wings For Thin Walls
5. Tighten two screws until 1/16" space (thickness of penny) is between screwheads
and wall (see Figure 6).
Thin or Thick Wall
(thick wall shown)
1/16" Space
Solid Wall
ANCHOR
Figure 6 - Tightening Anchors
7
Placing Heater On Mounting Screws
1. Locate two keyhole slots on back panel of heater (see Figure 7).
2. Place large openings of slots over screwheads. Slide heater down until screws
are in small portion of slots.
Keyhole Slots
Figure 7 - Location Of Keyhole Slots On Back Panel Of Heater
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.
Figure 8 - Removing Front Panel Of Heater
Installing Bottom Mounting Screw
1. Locate bottom mounting hole. This hole is near bottom on back panel of heater
(see Figure 9).
2. Mark screw location on wall.
3. Remove heater from wall.
4. If installing bottom mounting screw into hollow or solid wall, install wall anchor.
Follow steps 1 through 5 under Attaching To Wall Anchor Method, page 7.
If installing bottom mounting screw into wall stud, drill hole at marked location
using 9/64" drill bit.
5. Replace heater on wall.
6. Insert bottom anchor screw through back panel into bottom anchor or drilled
hole (see Figure 9).
7. Tighten screw 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 9-11).
Figure 9 - Installing Bottom Mounting Screw
8
CONNECTING
TO GAS
NOTICE
A qualified service person must connect heater to gas supply.
Follow all local codes.
SUPPLY
!
WARNING
WARNING ICON
G
001
Never connect heater to private (non-utility) gas wells. This gas is
commonly known as well-head gas.
IMPORTANT: Check gas line pressure before connecting heater to gas line. Gas
line pressure must be no greater than 14 inches of water. If gas line pressure is
higher, heater regulator damage could occur.
!
CAUTION
WARNING ICON
G
001
Use only new, black iron or steel pipe. Copper tubing may be used
in certain areas. Check your local codes. Use pipe 3/8" diameter or
greater 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, ground joint 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 10, page 10).
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.
!
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 10. 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.
Continued
9
IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping
and/or fittings.
Pressure
Regulator
3/8" NPT
Pipe Nipple
Heater
Cabinet
Ground Joint
Union
Manual
Shutoff
Valve *
Tee Joint
Reducer
Test
Gauge
Connection *
Bushing to
1/8" NPT
From
Gas Meter
(4" W.C. to
10.5" W.C.
Pressure)
1/8" NPT
Plug Tap
Tee
Joint
Sediment
Trap
3" Minimum
Pipe
Nipple
Cap
Figure 10 - 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 ACCESSORY, page 21.
CHECKING
GAS
CONNECTIONS
!
WARNING
WARNING ICON
G
001
Test all gas piping and connections for leaks after installing or
servicing. Correct all leaks at once.
!
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
10
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.
Test Pressures Equal To or Less Than 1/2 PSIG
1. Close manual shutoff valve (see Figure 11).
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 12). 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 11).
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 12).
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 12 through 15). Check the rest
of the internal joints for leaks.
7. Turn off heater (see TO TURN OFF GAS TO APPLIANCE, page 15).
8. Replace front panel.
Open
P
Manual
Shutoff
Valve
Closed
Figure 11 - Manual Shutoff Valve
Control Valve Location
Gas Meter
Manual
Shutoff
Valve
Figure 12 - Checking Gas Joints
11
FOR YOUR SAFETY READ BEFORE LIGHTING
OPERATING
HEATER
!
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.
Clockwise
3. Turn control knob clockwise
to the OFF position.
Control Knob
OFF
PILOT
IGN
LOW
HIGH
Figure 13 - Control Knob In The OFF Position (Model VN12 Shown)
12
4. Wait five (5) 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 12. If you don’t smell gas, go to the next step.
5. Press in control knob.
Note: You may be running this heater for the first time after hooking up to gas
supply. If so, the control knob may need to be pressed in 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 gas supplier for repairs.
C-clockwise
6. Keep control knob pressed in and turn it counterclockwise
PILOT/IGN position. This will light pilot.
to the
Note: You will hear a loud “click” when the control knob reaches the
PILOT/IGN position.
If pilot does not light
Clockwise
• turn control knob clockwise
• repeat steps 5 and 6
to the OFF position
If pilot does not stay lit after several tries
• refer to TROUBLESHOOTING, pages 17 through 20
• contact a qualified service person or gas supplier
Until repairs are made, light pilot with match. To light pilot with match, see
Ignitor Electrode
Pilot Burner
Thermocouple
Figure 14 - Pilot
MANUAL LIGHTING PROCEDURE, page 15.
7. Keep control knob pressed in for 10 seconds after lighting pilot. After 10 sec-
onds, release control knob.
Note: If pilot goes out, repeat steps 3 through 7.
13
TO SELECT HEATING LEVEL
!
WARNING
WARNING ICON
G
001
When running heater, set control knob at LOW or HIGH locked
positions (VN12) or ON position (VN6A). 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.
C-clockwise
1. Slightly press in control knob and turn counterclockwise
HIGH positions (VN12) or ON position (VN6A).
to the LOW or
IMPORTANT: Release downward pressure while turning control knob. Control
knob will lock at the desired position.
Control
Knob
VN6A
Burner
Control
Knob
VN12
Burners
OFF
OFF
PILOT
IGN
PILOT
IGN
ON
LOW
OFF
OFF
PILOT
IGN
HIGH
OFF
Figure 15 - Burner Patterns
14
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
Clockwise
to the OFF position.
Shutting Off Burner Only (pilot stays lit)
Clockwise
1. Turn control knob clockwise
to the PILOT position.
MANUAL LIGHTING PROCEDURE
1. Remove front panel (see Figure 8, page 8).
2. Follow steps 1 through 6 under LIGHTING INSTRUCTIONS, pages 12 and 13.
3. With control knob pressed in, strike match. Hold match to pilot until pilot lights.
4. Keep control knob pressed in for 10 seconds after pilot is lit. After 10 seconds,
release control knob.
5. Replace front panel.
Check pilot flame pattern and burner flame pattern often.
INSPECTING
BURNER
PILOT FLAME PATTERN
Figure 16 shows a correct pilot flame pattern. Figure 17 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
GOOD PILOT
Figure 16 - Correct Pilot Flame PGaRtHt/OeVr0n09
Pilot Burner
Thermocouple
GRH/OV 010
FiguBrAeD P1IL7OT- Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 17
• turn heater off (see TO TURN OFF GAS TO APPLIANCE, above)
• see TROUBLESHOOTING, pages 17 through 20
Continued
15
BURNER FLAME PATTERN
Figure 18 shows a correct burner flame pattern. Figure 19 shows an incorrect
burner flame pattern.
Figure 18 - Correct Burner Flame Pattern (Model VN12 Shown)
Figure 19 - Incorrect Burner Flame Pattern (Model VN12 Shown)
If burner flame pattern is incorrect, as shown in Figure 19
• turn heater off (see TO TURN OFF GAS TO APPLIANCE, page 15)
• see TROUBLESHOOTING, pages 17 through 20
CLEANING
AND
!
WARNING
WARNING ICON
G
001
Turn off heater and let cool before cleaning.
MAINTENANCE
!
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.
16
TROUBLE-
SHOOTING
!
WARNING
WARNING ICON
G
001
Turn off heater and let cool before servicing. Only a qualified
service person should service and repair heater.
Note: All troubleshooting
items are listed in order of
operation.
!
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
POSSIBLE
CAUSE
REMEDY
When control knob is 1. Ignitor electrode posi- 1. Replace ignitor
pressed in and turned tioned wrong
to the PILOT/IGN po- 2. Ignitor electrode broken
sition, there is no 3. Ignitor electrode not con- 3. Reconnect ignitor cable
2. Replace ignitor
spark at ODS/pilot
nected to ignitor cable
4. Ignitor cable pinched or 4. Free ignitor cable if
wet
pinched by any metal or
tubing.Keepignitorcable
dry
5. Broken ignitor cable
6. Bad piezo ignitor
5. Replace ignitor cable
6. Replacecontrolvalve(pi-
ezo is part of control
valve)
When control knob is 1. Gas supply turned off or 1. Turn on gas supply or
pressed in and turned
to the PILOT/IGN po-
manual shutoff valve
closed
open manual shutoff
valve
sition, there is spark at 2. Control knob not pressed 2. Press in control knob
ODS/pilotbutnoigni-
tion
in while being turned to
PILOT/IGN position
while turning to PILOT/
IGN position
3. Air in gas lines when in- 3. Continue holding down
stalled
control knob. Repeat ig-
niting operation until air
is removed
4. ODS/pilot is clogged
4. Clean ODS/pilot (see
C L E A N I N G A N D
MAINTENANCE, page
16) or replace ODS/pilot
assembly
5. Gas regulator setting is 5. Replace gas regulator
not correct
17
POSSIBLE
CAUSE
OBSERVED
PROBLEM
REMEDY
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
1. Press in control knob
fully
2. After ODS/pilot lights,
keep control knob
pressed in 10 seconds
3. Fully open manual shut-
off valve
3. Manual shutoff valve
not fully open
4. Thermocouple connec-
tion loose at control
valve
4. Hand tighten until snug,
then tighten 1/4 turn
more
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:
5. A) Contact local natural
gas company
B)CleanODS/pilot(see
CLEANING
AND
M A I N T E N A N C E ,
page 16) or replace
ODS/pilot assembly
A) Low gas pressure
B) Dirty or partially
clogged ODS/pilot
6. Thermocouple dam-
aged
7. Control valve damaged
6. Replace thermocouple
7. Replace control valve
Burner(s) does not 1. Burner orifice(s) is 1. Clean burner orifice(s)
lightafterODS/pilotis
lit
clogged
(see CLEANING AND
MAINTENANCE, page
16) or replace burner
orifice(s)
2. Burner orifice(s) di- 2. Replace burner orifice(s)
ameter is too small
3. Inlet gas pressure is too 3. Contact local natural gas
low
company
Delayed ignition of 1. Manifoldpressureistoo 1. Contact local natural gas
burner(s)
low
company
2. Burner orifice(s) is 2. Clean burner orifice(s)
clogged
(see CLEANING AND
MAINTENANCE, page
16) or replace burner
orifice(s)
Burner backfiring
during combustion
1. Burner orifice(s) is 1. Clean burner orifice(s)
clogged or damaged
(see CLEANING AND
MAINTENANCE, page
16) or replace burner
orifice(s)
2. Burner damaged
2. Replace burner
3. Gas regulator defective
3. Replace gas regulator
18
POSSIBLE
CAUSE
OBSERVED
PROBLEM
REMEDY
1. Plaque damaged
2. Inlet gas pressure is too
low
Burner plaque(s) does
not glow
1. Replace burner
2. Contact local natural gas
company
3. Control knob set be-
tween locked positions
3. Turncontrolknobuntilit
locks at desired setting
1. Residues from manu-
facturing processes
Slight smoke or odor
during initial opera-
tion
1. Problem will stop after a
few hours of operation
1. Metal expanding while
heating or contracting
while cooling
Heater produces a
clicking/ticking noise
justafterburnerislitor
shut off
1. This is common with
most heaters. If noise is
excessive, contact quali-
fied service person
!
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.
1. Heater burning vapors
from paint, hair spray,
glues, etc.
Heater produces un-
wanted odors
1. Ventilate room. Stop us-
ing odor-causing prod-
ucts while heater is run-
ning
2. Gas leak. See Warn-
ing statement
above
2. Locate and correct all
leaks (see CHECKING
GAS CONNECTIONS,
page 10)
1. Not enough fresh air is
available
Heater shuts off in use
(ODS operates)
1. Open window and/or
door for ventilation
2. Low line pressure
2. Contact local natural gas
company
3. ODS/pilot is partially
clogged
3. Clean ODS/pilot (see
CLEANING
AND
MAINTENANCE, page
16)
19
!
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.
POSSIBLE
CAUSE
OBSERVED
PROBLEM
REMEDY
1. Gas leak. See Warn-
ing statement at
top of page
1. Locate and correct all
leaks (see CHECK-
Gas odor even when
control knob is in OFF
position
ING GAS CONNEC-
TIONS, page 10)
2. Control valve defective
2. Replace control valve
1. Foreign matter between
control valve and
burner
1. Take apart gas tubing
and remove foreign mat-
ter
Gas odor during com-
bustion
2. Gas leak. See Warn-
ing statement at
top of page
2. Locate and correct all
leaks (see CHECKING
GAS CONNECTIONS,
page 10)
You may have further questions about installation, operation, or troubleshooting.
If so, contact DESA International’s Technical Service Department at 1-800-323-
5190.
TECHNICAL
SERVICE
VN12
VN6A
6,000
Natural Only
Piezo
SPECIFICATIONS
B.T.U. (Variable)
Type Gas
Ignition
6,000/12,000
Natural Only
Piezo
Pressure Regulator Setting
3" W.C.
3" W.C.
Inlet Gas Pressure (inches of water)
Maximum
Minimum
10.5"
4"
10.5"
4"
Dimensions, Inches (H x W x D)
Heater
20 1/2 x 13 1/2 x 5
25 x 16 11/16 x 7 1/2
20 1/2 x 13 1/2 x 5
25 x 16 11/16 x 7 1/2
Carton
Weight (pounds)
Heater
14
17
13
16
Shipping
20
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
SERVICE
HINTS
• 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.
Note: Use only original replacement parts. This will protect your warranty cover-
age for parts replaced under warranty.
REPLACEMENT
PARTS
Parts Under Warranty
Contact authorized dealer from whom you purchased this product. If they cannot
supply original replacement part(s), call DESA International’s Technical Service
Department at 1-800-323-5190 for referral 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 cannot supply original replace-
ment part(s), call DESA International’s Parts Department at 1-800-972-7879.
When calling DESA International, have ready:
• model number of your heater
• the replacement part number
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.
SERVICE
PUBLICATIONS
Purchase this heater accessory from your local dealer. If they cannot supply this
accessory, call DESA International’s Parts Department at
1-800-972-7879. You can also write to the address
ACCESSORY
listed on the back page of this manual.
MANUAL SHUTOFF
VALVE - GA5010
Manual shutoff valve with 1/8"
NPT tap.
21
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under REPLACEMENT PARTS on page 21 of this manual.
PARTS LIST
VN6A
KEY PART
KEY PART
NO.
NUMBER
DESCRIPTION
QTY. NO.
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
098304-01
099467-01
099318-01
098342-01
099469-01
M15823-37
503329
Screw, #10 x 3/8"
Front Panel Assembly
Grill Guard
2
1
1
2
1
9
1
1
1
1
1
1
1
1
13
14
15
16
17
18
19
20
21
22
099384-01
099057-01
098276-01
099468-03
099415-01
098303-02
098508-01
099393-01
M11084-26
099818-01
Control Valve
Pressure Tap Fitting
1/8 Pipe Plug
Cabinet Assembly
Gas Regulator
Screw, #6 x 5/16"
Valve Retainer Nut
Control Knob
1
1
1
1
1
2
1
1
2
1
Grill Guard Clip
Reflector Assembly
Screw Hex #8 x 1/4"
ODS/Pilot Assembly
Thermocouple
Ignitor Electrode
Burner Assembly
Injector
Tubing - Valve to burner
Pilot Tubing - Valve to pilot
Tubing - Regulator to valve
7-1 098514-01
7-2 098594-01
099884-01
Screw, #10 x 3/8"
Internal Tooth Washer
8
9
099056-04
PARTS AVAILABLE - NOT SHOWN
10
11
12
099390-01
099387-05
099391-02
099395-01
Control Position Label
1
20
19
22
ILLUSTRATED
PARTS
16
BREAKDOWN
VN6A
HEATER EXPLODED VIEW
8
4
7
18
17
6
21
13
5
14
6
11
3
10
15
7-1
7-2
9
12
2
1
ODS/PILOT
22
This list contains replaceable parts used in your heater. When ordering parts, follow
the instructions listed under REPLACEMENT PARTS on page 21 of this manual.
PARTS LIST
VN12
KEY PART
KEY PART
NO.
NUMBER
DESCRIPTION
QTY. NO.
NUMBER
DESCRIPTION
QTY.
1
2
3
4
5
6
7
098304-01
099467-01
099318-01
098342-01
099469-02
M15823-37
503329
Screw, #10 x 3/8"
Front Panel Assembly
Grill Guard
2
1
1
2
1
13
14
15
16
17
099391-02
099385-01
099057-01
098276-01
099468-02
099415-01
098303-02
098508-01
099393-01
M11084-26
099818-01
Tubing - Regulator to valve
Control Valve
Pressure Tap Fitting
1/8 Pipe Plug
Cabinet Assembly
Gas Regulator
Screw, #6 x 5/16"
Valve Retainer Nut
Control Knob
1
1
1
1
1
1
2
1
1
2
1
Grill Guard Clip
Reflector Assembly
Screw Hex #8 x 1/4"
ODS/Pilot Assembly
Thermocouple
Ignitor Electrode
Burner Assembly
Injector
Tubing - Valve to plaque A
Pilot Tubing - Valve to pilot
Tubing - Valve to plaque B
10 18
1
1
1
1
2
1
1
1
19
20
21
22
23
7-1 098514-01
7-2 098594-01
099884-02
8
9
Screw, #10 x 3/8"
Internal Tooth Washer
099056-04
10
11
12
099390-02
099387-05
099392-01
PARTS AVAILABLE - NOT SHOWN
099395-02
Control Position Label
1
17
21
20
23
ILLUSTRATED
PARTS
BREAKDOWN
VN12
HEATER EXPLODED VIEW
8
4
A
7
B
19
18
6
22
14
5
15
6
11
3
10
16
7-1
7-2
9
13
2
9
12
1
ODS/PILOT
23
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 RESIDENTIAL 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 regard-
ing those rights, please consult the applicable state laws.
2701 Industrial Drive
P.O. Box 90004
099399-01
Bowling Green, KY 42102-9004
REV. G
5/94
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