®
VENTED NATURAL
GAS HEATERS
OWNER’S OPERATION AND INSTALLATION MANUAL
Models: GVC65NA, GVC50NA, GVC35NA
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: Improper installation,
adjustment, alteration, service, or
maintenance can cause property
damage, personal injury or loss of
life. Refer to this manual for cor-
rect installation and operational
procedures. For assistance or
additional information consult a
qualified installer, service agency,
or the gas supplier.
FOR YOUR SAFETY
— 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.
®
— Installation and service must be per-
formed by a qualified installer, service
agency, or the gas supplier.
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SAFETY
INFORMATION
WARNINGS
IMPORTANT: Read this owner’s manual carefully and completely be-
fore trying to assemble, operate, or service this heater. Improper use of
thisheatercancauseseriousinjuryordeathfromburns,fire,explosion,
electrical shock, and carbon monoxide poisoning.
DANGER
Carbon monoxide poisoning may lead to death!
Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning
resemble the flu, with headaches, dizziness, or nausea. If you have these signs, the
heater may not be operating or venting properly. Get fresh air at once! Have heater
or heater venting system serviced. Some people are more affected by carbon
monoxide than others. These include pregnant women, people with heart or lung
disease or anemia, those under the influence of alcohol, and those at high altitudes.
NaturalGas: Naturalgasisodorless.Anodor-makingagentisaddedtonaturalgas.
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.
1. A qualified service person must install heater and venting system.
2. Use only natural gas. Do not convert heater to use different fuel type.
3. 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.
4. This heater must have fresh air for proper operation. If not, poor fuel combustion
and improper venting of flue gases will result. Carbon monoxide poisoning from
backed-up flue gases could occur. The State of California lists carbon monoxide
asareproductivetoxinunderProposition65. ReadtheinstructionsunderFreshAir
for Combustion and Ventilation, pages 14 through 17 for complete information.
5. Never install the heater
• in a mobile home or a recreational vehicle.
• where curtains, furniture, clothing, or other flammable objects are less than 48
inches from the front, 53 inches from top, or 12 inches from right side and 6
inches from left side and back of heater.
• directly on carpeting, tile, or other combustible materials other than wood
flooring. Place heater on metal or wood panel extending the full width and
depth of heater.
• as a fireplace insert.
• in high traffic areas.
• in windy or drafty areas.
Continued
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SAFETY
WARNINGS Continued
INFORMATION
6. Provide the following minimum heater clearances from combustibles (as viewed
from the front of heater):
Continued
Front: 48 inches
Back: 6 inches
Top: 53 inches
Right Side: 12 inches
Left Side: 6 inches
7. Do not run heater
• where flammable liquids or vapors are used or stored
• under dusty conditions
8. Never place clothing or any flammable objects on the heater or venting system.
9. Heater and venting system surfaces are very hot during operation. Keep children
and adults away from hot surfaces to avoid burns or clothing ignition. Carefully
supervise young children when they are in the same room as heater. Heater will
remain hot for a time after shutdown. Let surface cool before touching.
10. Do not use heater as a cooking device.
11. Do not alter heater or its controls. Any change may create a safety hazard.
12. Turn off heater and unplug (if equipped with blower) and let cool before
servicing. Unless you need gas supply for testing, shut off manual shutoff valve
before servicing. Only a qualified service person should service and repair heater
and venting system.
13. Replace any safety screen or guard removed for servicing before running heater.
14. Do not use heater if any part has been under water. Immediately call a qualified
service person to inspect the heater and to replace any part of the control system and
any gas control which has been under water.
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Control
Knob
PRODUCT
IDENTIFICATION
Ignitor
Button
Lower Front
Access Panel
Figure 1 - Vented Natural Gas Heater
Draft Hood
Outlet for
Venting
System
Control
Valve
Blower
(on models
equipped with
blower)
Figure 2 - Vented Natural Gas Heater, Rear View
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Install and use heater with care. Follow all local codes. In the absence of local
codes, use the latest edition of the following:
LOCAL CODES
UNPACKING
• National Fuel Gas Code ANSI Z223.1, also known as NFPA 54 *
• National Electrical Code ANSI/NFPA 70 *
• National Standard of Canada CAN1-B149 **
*Available from: American National Standards Institute, Inc., 1430 Broadway,
New York, NY 10018; or National Fire Protection Association, Inc., Batterymarch
Park, Quincy, MA 02269
**Available from: Standards Council of Canada, 350 Sparks Street, Ottawa,
Ontario, K1R 7S8
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.
Piezo Ignition System
This heater has a piezo ignitor. This system requires no matches, batteries, or other
sources to light heater.
PRODUCT
FEATURES
Thermostatic Heat Control
This heater has a thermostat sensing bulb and a control valve. This results in the
greatest heating comfort. This can also result in lower gas bills.
INSTALLING
HEATER
WARNING
A qualified service person must install heater and
venting system. Have them inspect heater before use
and at least annually. Follow all local codes.
NOTICE
This heater must be electrically grounded if equipped with
blower. Follow all local codes. In the absence of local
codes, follow the National Electric Code, ANSI/NFPA 70
(U.S.) or Canadian Electrical Code CSA C22.1 (Canada).
CHECK GAS TYPE
Use only natural gas. If your gas supply is not natural gas, do not install heater.
Call dealer where you bought heater for proper type heater.
INSTALLATION ITEMS
Before installing heater, make sure you have all items below.
• piping (check local codes)
• sealant (resistant to propane gas)
• manual shutoff valve *
• ground joint union
• sediment trap
• tee joint
• pipe wrench
• venting materials
• test gauge connection * (see
Figure 7, page 12)
* 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.
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LOCATING HEATER
INSTALLING
HEATER
WARNING
Maintain the minimum clearances shown in Figure 3,
Continued
below. If you can, provide greater clearances.
WARNING
Never install the heater
• in a mobile home or a recreational vehicle.
• where curtains, furniture, clothing, or other flam-
mable objects are less than 48 inches from the front,
53 inches from the top, 12 inches from the right side
and 6 inches from the left side and back of heater.
• directly on carpeting, tile, or other combustible
materials other than wood flooring. Place heater on
metal or wood panel extending the full width and
depth of heater.
• as a fireplace insert.
• in high traffic areas.
• in windy or drafty areas.
CAUTION
If you install the heater in a home garage
• heater pilot and burner must be at least 18 inches
above floor
• locate heater where moving vehicle will not hit it.
For convenience and efficiency, install heater
• where there is easy access for operation, inspection, and service.
• in coldest part of room.
• near an electrical outlet if heater has blower or if you are planning to add
blower to heater. See Accessories, page 31 for blower.
CEILING
6"
Minimum
53"
Minimum
Right
Side
Left
Side
6" Minimum
from Back
12"
Minimum
48" Minimum from
Front of Heater
Continued
Figure 3 - Heater Clearances
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VENTING HEATER
INSTALLING
Note: Venting/chimney materials are not supplied with heater.
HEATER
Continued
WARNING
A qualified service person must install the venting system
for this heater. If venting system is not properly installed
and maintained, the vent safety shut-off system will pre-
vent the heater from running. Follow all local codes.
WARNING
This heater has a vent safety shut-off system. This
system shuts off the heater gas supply if you do not
vent heater properly or the venting system is blocked.
Do not operate heater if not properly vented. Do not
tamper with the vent safety shut-off system. Carbon
monoxide poisoning and death may result.
WARNING
When venting this heater, follow the safety information
listed below.
• Never vent heater to another room or inside a build-
ing. Only vent heater to the outdoors.
• Do not vent heater exhaust to a chimney or flue
serving another solid-fuel-burning or gas appliance.
• We recommend you use flues classified as prefabri-
cated or masonry all-fuel chimney or type-B vent. See
Vent Types, page 10.
• If using old vent, check vent for soot, creosote, and
loose particles. If vent is damaged, repair or replace
it before using heater.
• Extend the vertical section of vent pipe at least three
feet above roof penetration.
• Extend the vertical section of vent pipe at least two
feet above the highest point of any roof within ten
feet.
• The horizontal run of vent pipe should rise at least
1/4 inch for each foot of run.
• Support the vent pipe at least every five feet along its
length. Do not use combustible materials to support
vent pipe.
• Never extend vent pipe horizontally through outside
wall and terminate. You must connect a vertical run
of vent pipe to the horizontal run. The vertical run
must be at least 25% longer than the horizontal run.
• Install vent or chimney cap that is approved for use
with vented gas room heaters.
• Do not use vent pipe smaller in diameter than that of
the heater draft hood outlet.
• Do not use dampers in the vent pipes.
• Vertical height of vent must be greater than five feet
above vent connection at draft hood.
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VENTING HEATER (continued)
INSTALLING
WARNING
HEATER
Continued
Do not vent heater in any of the following ways (see Figure 4).
The vertical section of vent pipe must
extend at least two feet above the
highest point of any roof within ten
feet.
Heater must be vented to the out-
doors. Never vent heater to another
room or inside a building.
Never extend vent pipe horizontally
through a chimney or flue. You must
connect a vertical run of vent pipe to
the horizontal run. The vertical run
must be at least 25% longer or five
feet minimum than the horizontal run.
Never extend vent pipe horizontally
through outside wall and terminate.
You must connect a vertical run of
vent pipe to the horizontal run. The
vertical run must be at least 25%
longer than the horizontal run.
Less than 5' between elbows
Vertical run of pipe must be at least
five feet from elbow to elbow.
Figure 4 - Improper Venting Systems
Continued
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VENTING HEATER (continued)
INSTALLING
Proper Size Vent
HEATER
To safely vent heater, the vent connector pipe must be the same diameter as the draft
hood outlet on the rear of the heater. Pipe that is too small can cause flue gas to spill
fromtheheater.Fastenventconnectortothedrafthoodoutletwithasheetmetalscrew.
Continued
Vent Types
Prefabricated or Masonry All-Fuel Chimney - This is a masonry chimney or a
residential-type prefabricated chimney. Only use prefabricated chimneys listed by
Underwriters Laboratories (UL), Inc.
Type-B Vent - These vents are made of noncombustible, corrosion resistant
material. They are certified by a nationally recognized testing agency. Type-B
vents are double-walled pipe. Clearances to combustible construction must be in
accordance with the listing of the particular type-B vent. Type-B vents are cur-
rently listed as B-1, B-1 1/2, and B-2.
The illustrations below show both vent types. The illustration shows typical
construction of each type of venting system. Minimum clearances and lengths are
added to the illustrations.
Terminate at least 5' above draft hood. If vent extends over
5' above roof, support with guy wires or braces.
Seal Around
Collar and
Flashing
Vent Cap
Must Be At
Least 2 Feet
Above
Highest Point
Within 10
Feet.
Maintain Listed
Clearance of Vent
Lock
Joints
Position
Firestop
Support
Laterals
Support If
Necessary
Lock Joints
Maintain Listed
Clearance of
Vent
53"
Min.
6"
Min.
5'
Min.
Vertical Vent
Lock Joints
Heater
Heater
Vent
Connector
Type-B Vent
Prefabricated or Masonry
All-Fuel Chimney
Figure 5 - Typical Construction of Venting Systems
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CONNECTING TO GAS SUPPLY
INSTALLING
HEATER
WARNING
A qualified service person must connect heater to gas
supply. Follow all local codes.
Continued
WARNING
Never connect heater to private (non-utility) gas wells.
This gas is commonly known as well-head gas.
IMPORTANT: Check gas line pressure at gas meter 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.
Gas Meter
Figure 6 - Connecting Heater to Utility Gas Line
CAUTION
Use only new, black iron or steel pipe. Internally-tinned
copper tubing may be used in certain areas. Check your
local codes. Use pipe that is 1/2" in diameter or greater
to allow proper gas volume to heater. If pipe is too
small, undue loss of pressure will occur.
The gas supply line to your heater must be 1/2 inch in diameter or larger. If the
supply line branches to serve two or more heaters, the line from the branch back to
the gas meter must be doubled or tripled, etc., in size (depending upon the number
of heaters). Example for 1/2 inch diameter supply line: If the supply line branches
to serve two heaters, the line diameter from the branch back to the gas meter must
be at least 1 inch. If three heaters are served, the line diameter from the branch
back to the gas meter must be at least 1 1/2 inches.
Note: If gas supply line total length exceeds forty feet, use a larger diameter pipe.
Use pipe that is the next size larger than the heater control valve fitting.
Continued
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Installation must include a manual shutoff valve, ground joint union, plugged 1/8"
NPT tap, and a sediment trap. Locate NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see Figure 7).
INSTALLING
HEATER
Continued
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
Use pipe joint sealant that is resistant to liquid petro-
leum (LP) gas.
Install sediment trap in supply line as shown in Figure 7. 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.
IMPORTANT: Use two pipe wrenches when connecting gas piping to gas control
valve of heater. This will prevent turning or damaging control valve.
Acceptable
construction
of inlet gas
Control
Valve
line
From Gas
Meter (5" W.C.
Min** to 7"
W.C. Max)
Manual
Shutoff
Valve *
Ground
Joint
Union
Preferred
construction
of inlet gas
line
Reducer
Bushing to
1/8" NPT
Test
Gauge
Connection*
From
1/8" NPT
Plug Tap
Gas
Meter (5"
W.C.
Min** to
7" W.C.
Max)
Tee Joint
Tee Joint
Pipe
Nipple
Sediment
Trap
Cap
Figure 7 - 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.
** For purposes of input adjustment.
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CHECKING GAS CONNECTIONS
INSTALLING
WARNING
Test all gas piping and connections for leaks after install-
ing or servicing. Correct all leaks at once.
HEATER
Continued
WARNING
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
pipe. 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.
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 8).
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 propane supply tank to manual shutoff valve. 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 8).
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 on heater. 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 18 through 20). Check the rest of the
internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 20).
On Position
Off Position
Figure 8 - Manual Shutoff Valve
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FRESH AIR FOR
COMBUSTION
AND
WARNING
This heater must have fresh air for proper operation. If
not, poor fuel combustion and improper venting of flue
gases will result. Carbon monoxide poisoning from
backed-up flue gases could occur. Read the following
instructions to insure proper fresh air for this and other
fuel-burning appliances in your home.
VENTILATION
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, it is not good to make it too
airtight. Your home needs to breath. If your home is too airtight, fresh air has little
chance of entering in. This could be dangerous if you have fuel-burning appliances.
These appliances need fresh, outside air for proper combustion and ventilation.
Exhaust fans, fireplaces, clothes dryers, and fuel-burning appliances draw air from
the house to operate. This heater is a fuel-burning appliance. It uses air from inside
the house for combustion. It also uses this air as a draft for venting. This draft air
helps move combustion gases through the vent pipe to the outdoors. If your house
is too airtight, there is not enough fresh air for these items to use. Fresh air may
draw back into the house through venting flues and chimneys. This will keep fuel-
burning appliances from venting properly. This may cause them to release poison-
ous carbon monoxide gas into your home. It is very important to provide enough
fresh air to run all fuel-burning appliances.
DANGER
Carbon monoxide poisoning may lead to death!
Carbon monoxide is a colorless, odorless gas. Early signs of carbon monoxide
poisoning resemble the flu, with headaches, dizziness, and/or nausea. If you have
these signs, the heater may not be operating or venting properly. Get fresh air at
once! Have heater or heater venting system serviced. Some people are more
affected by carbon monoxide than others. These include pregnant women, persons
with heart and lung disease and anemia, those under the influence of alcohol, and
those at high altitudes.
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DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Example 1: Locating Heater in Unconfined (Open) Area
FRESH AIR FOR
COMBUSTION
AND
NOTICE
An unconfined area has a minimum air volume of 50
cubic feet for each 1000 BTU/Hr input rating of all
appliances in the area (cubic feet equals length x width
x height of area). Include adjoining rooms only if there
are no doors between the rooms or if you add ventila-
tion grills between the rooms (see Ventilating Confined
Area, page 17).
VENTILATION
Continued
In an open area, the air that leaks around doors and windows may provide enough
fresh air for combustion and ventilation.
Draft Hood Spillage Test
Follow the steps below to see if enough fresh air is available.
1. Close all windows and doors.
2. If you have a fireplace, start a fire. Build fire until flames are burning strongly.
3. Turn on all exhaust fans. These include exhaust fans for kitchen, bathroom,
water heaters (gas or electric), etc.
4. Turn on all vented gas appliances. These include any room heaters, water
heaters, clothes dryer, etc.
5. Wait ten minutes for drafts to regulate.
6. Check for draft-hood spillage at each vented gas appliance. Do this by holding
a lit match two inches from the draft opening (see Figure 9). If match flame
pulls toward the draft hood, there is no spillage. If match flame blows away
from the draft hood, there is spillage. This is a hazardous condition. See Draft
Hood Spillage, page 16.
Vent Pipe
Vent Pipe
Draft Hood
Match
Heater
Typical
Water
Match
Heater
Draft Hood
Opening
Figure 9 - Checking for Draft Spillage
No Draft Hood Spillage: This shows there is enough fresh air in area for
appliances. Turn off all exhaust fans and appliances if desired.
Continued
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Draft Hood Spillage: This is a hazardous situation. Draft hood spillage re-
leases poisonous carbon monoxide gas into your home.
FRESH AIR FOR
COMBUSTION
AND
DANGER
Carbon monoxide poisoning may lead to death!
VENTILATION
If draft hood spillage occurs, check for blocked flue connectors, vent pipes, and
chimneys. If you find blockage, remove. Test again for spillage. If spillage still
occurs or there was no blockage, you need more fresh, outside air in the house. You
must provide additional fresh-air ventilation. Follow the steps below at once.
Continued
A. Open a window near the appliance(s) at least two inches. Test again for
spillage. If spillage does not stop, open window more and retest. If spillage
stops, keep window open while running appliance(s). Supply fresh, outside
air by a permanent method as soon as possible. If spillage still occurs, leave
window open and go to next step.
B. If you have a fireplace, open a window or door near it at least two inches.
Test again for spillage. If spillage does not stop, open window or door more
and retest. If spillage stops, keep window or door open while using fire-
place. Supply fresh, outside air by a permanent method as soon as possible.
If spillage still occurs, leave window or door open and go to next step.
C. If you have kitchen and bathroom exhaust fans, turn them off. Test again for
spillage. If spillage stops, do not use exhaust fans. Turn off circuit breakers for
fans if possible. Permanently supply fresh, outside air as soon as possible.
Providing Permanent Fresh-Air Ventilation
If draft hood spillage occurs, you must permanently supply fresh, outside air to the
inside of your house. Provide extra fresh air by using ventilation grills or ducts.
Connect these items directly to the outdoors or spaces open to the outdoors. These
spaces include attics and crawl spaces. If you install this heater in an area with
other gas appliances, you must total the BTU/Hr input rating of all appliances.
Follow the National Fuel Gas Code NFPA 54/ANSI Z223.1. It lists fresh-air
requirements for fuel-burning appliances.
IMPORTANT
Do not provide openings for inlet or outlet air into attic
if attic has a thermostat controlled power vent.
Chimney
or Gas
Vent
Ventilated
Attic
Outlet
Air
Outlet
Air
To Attic
To
Crawl
Space
Inlet
Air
Ventilated
Crawl Space
Inlet Air
Figure 10 - Ventilation Air from Outdoors
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Example 2: Locating Heater in Confined (Closed) Area
FRESH AIR FOR
COMBUSTION
AND
NOTICE
A confined area has an air volume of less than 50 cubic
feet for each 1000 BTU/Hr input rating of all appliances
in the area (cubic feet equals length x width x height of
area). Include adjoining rooms only if there are no doors
between the rooms.
VENTILATION
Continued
If you install this heater in a confined area, you must provide additional fresh air.
Ventilating Confined Area
This fresh air would come from an adjoining open area or outdoors.
WARNING
The adjoining open area must have enough fresh,
outside air ventilation to supply any appliance in that
area plus the confined area. Follow instructions under
Example 1: Locating Heater in Unconfined (Open) Area,
page 15 to make sure fresh air ventilation is adequate.
When ventilating to an adjoining open area, 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 areas. Follow the National Fuel Gas Code NFPA 54/ANSI
Z223.1. It lists fresh-air requirements for fuel-burning appliances.
12"
Ventilation Grills
Connecting Two Rooms
to Meet Unconfined Space
Ventilation
Grills into
Closet for
Hot Water
Heater
12"
Recommended
Fresh Air Duct
into Crawl Space in
Furnace Area or in
Closet with Water Heater
Figure 11 - Ventilation Air from Inside Building
After providing ventilation between rooms, check for draft hood spillage (see Draft
Hood Spillage Test, page 15). If draft hood spillage still occurs, provide more
ventilation between rooms or provide permanent ventilation from outdoors. See
Providing Permanent Fresh-Air Ventilation, page 16.
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OPERATING
HEATER
WARNING
Heater and venting system surfaces are very hot during
operation. Keep children and adults away from hot sur-
facestoavoidburnsandclothingignition. Carefullysuper-
vise young children when they are in the same room as
heater.Heaterwillremainhotforatimeaftershutdown.Let
surface cool before touching.
NOTICE
If operating heater for the first time, a slight odor will occur.
This odor will go away after a few hours of operation.
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, per-
sonal 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. If heater is equipped with a blower, turn off all electric power to the heater.
3. Make sure manual shutoff valve is fully open.
4. Locate control knob on top of heater. Fully depress control knob in any position
other than PILOT to shut off burner and pilot.
DEPRESS
Ignitor Button
FOR OFF
PILOT
VEILLEUSE
APPUYER POUR
ARRÊTER
Control Knob
LOW
BAS
HIGH
HAUT
Figure 12 - Control Knob and Ignitor Button
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5. 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 18. If you don’t smell gas, go to the next step.
OPERATING
HEATER
Continued
6. Remove lower front access panel on heater.
7. Turn control knob clockwise
control knob for five seconds.
to the PILOT position. Fully depress
Clockwise
Note: You may be running this heater for the first time after hooking up to gas
supply. If so, you may need to depress control knob in for 15 seconds or more.
This allows air to bleed from the gas system.
8. With control knob depressed, push down and release ignitor button. This will
light pilot. The pilot is attached to the front of burner. You can see pilot with front
access panel of heater removed (see Figure 13). If needed, keep pressing ignitor
button until pilot lights.
Note: If pilot does not stay lit, refer to Troubleshooting pages 24 through 27.
Also contact a qualified service person or gas supplier for repairs. Until repairs
are made, light pilot with match. To light pilot with match, see Manual Lighting
Procedure, page 20
9. Keep control knob depressed for 30 seconds after lighting pilot. After 30 seconds,
release control knob.
• If control knob does not pop up when released, contact a qualified service
person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 4 through 9.
10. Replace lower front access panel on heater.
11. If heater is equipped with a blower, turn on all electrical power to the heater.
12. Turn control knob counterclockwise
to desired setting.
C-clockwise
13. If equipped, turn blower control to the AUTO or ON position (if desired).
CAUTION
Do not try to adjust heating levels by using the manual
shutoff valve.
Figure 13 - Viewing Pilot
Continued
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MANUAL LIGHTING PROCEDURE
OPERATING
HEATER
1. Remove lower front access panel on heater.
Continued
2. Locate pilot. Pilot is attached to the front of burner.
3. Follow steps 1 through 7 under Lighting Instructions, pages 18 and 19.
4. With control knob depressed, strike match. Hold match to pilot until pilot lights.
5. Follow steps 9 through 13 under Lighting Instructions, page 19.
BLOWER OPERATION
(For Models with Blower)
WARNING
This heater has a three-prong, grounded electrical plug.
This plug helps protect you against electrical shock.
Only connect plug to a properly grounded, three-prong
receptacle. Do not cut or remove the grounding prong
from this plug.
1. Plug power cord into a standard 115 volt, 60 hertz outlet.
2. Turn the blower control to either the AUTO or ON position. In the AUTO
position, as the heater begins to heat, the blower will automatically come on.
The blower will remain on until the burner shuts off and cools down. In the ON
position, the blower will stay on constantly. Turn the blower control to the OFF
position to stop the blower at any time.
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
1. Fully depress control knob in any position other than PILOT to shut off burner
and pilot.
2. If equipped, turn blower control to OFF position.
Shutting Off Burner Only (pilot stays lit)
1. Turn control knob to the PILOT position. At this setting, only the pilot remains
lit.
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Check pilot flame pattern and burner flame pattern often.
INSPECTING
PILOT AND
BURNER
PILOT FLAME PATTERN
Figure 14 shows a correct pilot flame pattern. Figure 15 shows an incorrect pilot
flame pattern. The incorrect pilot flame is not touching the thermocouple. This will
prevent the thermocouple from getting hot, causing the heater to shut down.
FLAME
Thermocouple
Thermocouple
Figure 14 - Correct Pilot
Flame Pattern
Figure 15 - Incorrect
Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 15
• turn heater off (see To Turn Off Gas to Appliance, page 20)
• contact a qualified service person
BURNER FLAME PATTERN
Note: To view burner flame, remove lower front access panel of heater. View burner
flame through oval viewing hole on combustion chamber.
Figure 16, page 22, shows a correct burner flame pattern. Figure 17, page 22,
shows two incorrect burner flame patterns. The two incorrect flame patterns show
high yellow flames and flames lifting off of burner.
WARNING
If high yellow flame occurs, your heater could produce
increased levels of carbon monoxide. If burner flame is
incorrect, follow instructions on page 22.
NOTICE
Do not mistake orange flames with yellow flame. Dirt or
other fine dust particles enter the heater and burn
causing brief patches of orange flame.
Continued
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INSPECTING
PILOT AND
BURNER
Sharp Blue
Flame
FLAME
Continued
Figure 16 - Correct Burner Flame Pattern
High
Yellow
Flame
Flame
Lifting
Off of
Burner
Figure 17 - Incorrect Burner Flame Patterns
If burner flame pattern is incorrect, as shown in Figure 17.
• turn heater off (see To Turn Off Gas to Appliance, page 20)
• see Troubleshooting, pages 24 through 27.
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CLEANING
AND
WARNING
Turn off heater and let cool before cleaning or servicing.
MAINTENANCE
WARNING
Keep heater clear and free from combustible materials,
gasoline, and other flammable vapors and liquids.
CAUTION
You must keep control areas, burner, and circulating air
passageways of heater clean. Inspect these areas of
heater before each use. Have heater and venting system
inspected yearly by a qualified service person. Heater
may need more frequent cleaning due to excessive lint
from carpeting, bedding material, etc.
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.
COMBUSTION CHAMBER AND BURNER
Clean the combustion chamber and burner if you have run the heater with a high
yellow flame. Incomplete combustion from lack of air causes the yellow flame.
This will deposit soot inside the combustion chamber and on the burner. To clean
combustion chamber and burner, you must remove the burner from heater. See
Service Procedures, page 28, to remove burner. After removing burner, blow inside
of combustion chamber clean with compressed air. Clean burner with a steel-wire
brush. Blow soot from burner with compressed air.
PILOT
Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean.
BURNER ORIFICE
Use a vacuum cleaner, compressed air, or small, soft-bristled brush to clean. You
can also use a tooth pick to clean orifice. Do not enlarge or damage orifice hole.
PILOT AND BURNER FLAME
Check the pilot and burner flame monthly. Make sure pilot and burner flame is
burning correctly. See Inspecting Pilot and Burner Flame, page 21.
VENTING SYSTEM
Check the venting system at least once a year. Make sure joints are secure and vent
pipe is in good condition. Do not obstruct combustion and ventilation air entering
the rear of heater.
BLOWER MOTOR (For Models with Blower)
The motor on a new blower is properly lubricated at the factory. The first heating
season, the motor will need no additional care. At the beginning of each season
afterwards, place a few drops of SAE 20 motor oil in the lubrication holes of motor.
Locate the lubrication holes at front and rear of motor on motor casing.
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TROUBLE-
SHOOTING
WARNING
Turn off and unplug heater and let cool before servicing.
Unless you need gas supply for testing, shut off manual
shutoff valve before servicing. Only a qualified service
person should service and repair heater and venting
system.
Note: All troubleshooting
items are listed in order of
operation.
CAUTION
Never use a wire, needle, or similar object to clean pilot.
This can damage pilot.
OBSERVED
PROBLEM
POSSIBLE
CAUSE
REMEDY
When ignitor button
is pressed, there is no 2. Ignitor electrode posi-
1. Incorrect spark gap.
1. Adjustsparkgapto1/16".
2. Replace ignitor.
spark at pilot.
tioned wrong.
3. Ignitor electrode broken. 3. Replace ignitor.
4. Ignitor electrode not con- 4. Reconnect ignitor cable.
nected to ignitor cable.
5. Ignitor cable pinched or
wet.
5. Free ignitor cable if
pinched by any metal or
tubing. Keep ignitor
cable dry.
6. Piezo ignitor nut is loose. 6. Tighten nut holding piezo
ignitor to heater cabinet.
Nut is located inside
heater cabinet at top.
7. Broken or frayed ignitor
cable.
7. Replace ignitor cable.
8. Loose ignitor cable.
9. Bad piezo ignitor.
8. Reconnect ignitor cable.
9. Replace piezo ignitor.
When ignitor button
is pressed, there is
spark at pilot but no
ignition.
1. Gas supply turned off or
manual shutoff valve
closed.
2. Control knob not in
PILOT position.
1. Turn on gas supply or
open manual shutoff
valve.
2. Turn control knob to
PILOT position.
3. Control knob not
pressed in while in
PILOT position.
3. Press in control knob
while in PILOT position.
4. Air in gas lines when
installed.
4. Continue holding down
control knob. Repeat
igniting operation until
air is removed.
5. Pilot is clogged.
5. Clean pilot (see Clean-
ing and Maintenance,
page 23) or replace pilot
assembly.
6. Gas regulator setting is
not correct.
6. Replace control valve.
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OBSERVED
PROBLEM
POSSIBLE
CAUSE
TROUBLE-
REMEDY
SHOOTING
Pilot lights but flame
goes out when
control knob is
released.
1. Manual shutoff valve
not fully open.
2. Control knob not fully
pressed in.
3. Control knob not
pressed in long
enough.
4. Safety interlock system
has been triggered.
1. Fully open manual
shut-off valve.
2. Press in control knob
fully.
3. After pilot lights, keep
control knob pressed in
30 seconds.
4. Wait one minute for
safety interlock system
toreset.Repeatignition.
5. Hand tighten until
snug, then tighten 1/4
turn more.
Continued
5. Thermocouple connec-
tion loose at control
valve.
6. Pilotflamenottouching
thermocouple, which
allows thermocouple to
cool, causing pilot
flame to go out. This
problem could be
caused by any or all of
the following:
6. A) Contact qualified
service person to
properly adjust pilot
flame
B) Contact local
natural gas company.
C) Clean pilot (see
Cleaning and Mainte-
nance, page 23) or
replace pilot assembly.
A) Improperly ad-
justed pilot flame
B) Low gas pressure
C) Dirty or partially
clogged pilot
7. Thermocouple damaged.
8. Control valve damaged.
7. Replace thermocouple.
8. Replace control valve.
Burner does not light
after pilot is lit.
1. Fully depress control
knob in any position
otherthanpilot. Waitone
minute for safety inter-
lock system to reset. Re-
peat ignition.
1. Safety interlock
system has been
inadvertently trig-
gered.
2. Clean burner (see
Cleaning and Mainte-
nance, page 23) or
2. Burner orifice is
clogged.
replace burner orifice
(see Changing Burner
Orifice, page 30).
3. Burner orifice diameter
is too small.
3. Replace burner orifice
(see Changing Burner
Orifice, page 30).
4. Contact local natural
gas company.
4. Inlet gas pressure is
too low.
Delayed ignition of
burner.
1. Manifold pressure is
too low.
2. Burner orifice is
clogged.
1. Contact local natural
gas company.
2. Clean burner (see
Cleaning and Mainte-
nance, page 23) or
replace burner orifice
(see Changing Burner
Orifice, page 30).
Continued
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OBSERVED
PROBLEM
POSSIBLE
CAUSE
TROUBLE-
REMEDY
SHOOTING
Burner backfiring
during combustion.
1. Burner orifice is
clogged or damaged.
1. Clean burner (see
Cleaning and Mainte-
nance, page 23) or
replace burner orifice
(see Changing Burner
Orifice, page 30).
Continued
2. Burner damaged.
2. Replace burner.
3. Gas regulator defective. 3. Replace control valve.
4. Delayed ignition.
1. Not enough air.
4. See above.
Yellow flame during
burner combustion.
1. Check burner for dirt
and debris. If found,
clean burner (see
Cleaning and Mainte-
nance, page 23).
2. Gas regulator defective. 2. Replace control valve.
Slight smoke or odor
during initial opera-
tion.
1. Residues from manu-
facturing processes.
1. Problem will stop after a
few hours of operation.
Burner fails to
respond to thermo-
stat.
1. Pilot flame not lit.
1. Light pilot burner (see
Lighting Instructions,
page 18).
2. Pilot flame not prop-
erly heating end of
thermocouple.
3. Pilot burner orifice
clogged or damaged.
2. Pilot flame needs
adjusting. Contact a
qualified service person.
3. Clean pilot burner (see
Cleaning and Mainte-
nance, page 23).
4. Control valve defec-
tive.
4. Replace control valve.
5. Temperature at ther-
mostat bulb satisfied.
Heater produces a
whistling noise when
burner is lit.
1. Air in gas line.
1. Operate burner until air
is removed from line.
Have gas line checked
by local natural gas
company.
2. Air passageways on
heater blocked.
2. Observe minimum
installation clearances
(see Figure 3, page 7).
3. Clean burner (see
Cleaning and Mainte-
nance, page 23) or
3. Dirty or partially
clogged burner orifice.
replace burner orifice
(see Changing Burner
Orifice, page 30).
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TROUBLE-
WARNING
If you smell gas
SHOOTING
• Shut off gas supply.
Continued
• 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.
OBSERVED
PROBLEM
POSSIBLE
CAUSE
REMEDY
1. This is common with
most heaters. If noise is
excessive, contact quali-
fied service person.
1. Metal expanding while
heating or contracting
while cooling.
Heater produces a
clicking/ticking noise
just after burner is lit
or shut off.
Heater produces
unwanted odors.
1. Heater burning vapors
from paint, hair spray,
glues, etc.
2. Gas leak. See Warn-
ing statement at
top of page.
1. Ventilate room. Stop us-
ingodorcausingproducts
while heater is running.
2. Find and correct all leaks
(see Checking Gas
Connections, page 13).
1. Heater not venting
correctly. Vent safety
switch shuts off
heater.
1. Check venting system.
If damaged or blocked,
repair. If venting
Heater shuts off in
use.
system is OK, have
qualified service person
replace vent safety
switch, wire harness, or
thermocouple inter-
rupter.
2. Low line pressure.
2. Contact local natural
gas company.
3. Pilot partially clogged.
3. Clean pilot (see Clean-
ing and Maintenance,
page 23).
Gas odor even when
control knob is in
OFF position.
1. Gas leak. See Warn-
ing statement at
top of page.
2. Control valve dam-
aged.
1. Find and correct all leaks
(see Checking Gas
Connections, page 13).
2. Replace control valve.
1. Foreign matter between
controlvalveandburner.
Gas odor during
combustion.
1. Take apart gas tubing and
remove foreign matter.
2. Find and correct all
leaks (seeCheckingGas
Connections, page 13).
3. Ventilate area around
heater to remove any
foreign fumes.
2. Gas leak. See Warn-
ing statement at
top of page.
3. Foreign fumes in area
of heater being drawn
through burner com-
bustion.
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SERVICE
PROCEDURES
WARNING
Turn off and unplug heater and let cool before servicing.
Unless you need gas supply for testing, shut off manual
shutoff valve before servicing. Only a qualified service
person should service and repair heater and venting
system.
Removing Control Valve
and Burner Tube
1. Shut off gas supply to
heater.
2. Remove lower front
access panel on heater.
3. Disconnect burner tube
from orifice holder (see
Figure 18).
4. Remove pilot gas line
from control valve (see
Control Rod
Cotter Pin
Control Valve
Control Valve
Bracket
Figure 18).
5. Disconnect wire connec-
tors from thermocouple
interrupter (see Figure
18).
6. Remove thermocouple
and thermocouple inter-
rupter from control valve.
7. Remove cotter pin from
control valve. This
Mounting
Screw
Orifice
Holder
releases the control rod
from valve (see Figure
18).
Burner Tube
Wire Connector
8. Remove the two mounting
screws from control valve
mounting bracket (see
Thermocouple
Interrupter
Figure 18).
9. Remove assembly from
the rear of heater. Pull
burner tube through hole
in combustion chamber.
10. To reinstall, reverse above
steps. Turn on gas to
heater and check for gas
leaks. Apply a mixture of
liquid soap and water to
all joints. Bubbles forming
show a leak. Correct all
leaks at once.
Thermocouple
Pilot Gas Line
Wire Connector
Figure 18 - Removing Control Valve and Burner Tube
11. Replace lower front
access panel.
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SERVICE
PROCEDURES
Continued
Removing Burner
1. Shut off gas supply to
heater.
Burner
2. Remove lower front
access panel on heater.
3. Disconnect burner tube
from orifice holder (see
Figure 19).
4. Remove orifice holder
Burner
Tube
from burner (see Figure
19).
5. Remove pilot burner
Pilot Burner
Assembly
Pilot Burner
Bracket Nut
bracket nuts and remove
pilot assembly (see Figure
19).
Orifice
Holder
6. Move burner to the right
for clearance. Rotate
burner 90° and remove
burner through lower front
access opening.
7. To reinstall, reverse above
steps. Turn on gas to
heater and check for gas
leaks. Apply a mixture of
liquid soap and water to
all joints. Bubbles form-
ing show a leak. Correct
all leaks at once.
Figure 19 - Removing Burner Tube, Orifice Holder, and Pilot Burner Assembly
(35,000 BTU/Hr Burner Shown)
Continued
8. Replace lower front
access panel.
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SERVICE
PROCEDURES
Continued
Burner
Changing Burner Orifice
1. Shut off gas supply to
heater.
2. Remove lower front
access panel on heater.
3. Disconnect burner tube
from orifice holder (see
Figure 20).
4. Remove orifice holder
Orifice
Burner
Tube
from burner (see Figure
20).
5. Use socket or open-end
wrench to remove the old
orifice from the orifice
holder.
Orifice
Holder
6. Clean and replace orifice,
or replace with new
orifice.
Figure 20 - Orifice Location (35,000 BTU/Hr Burner Shown)
7. Turn on gas to heater and
check for gas leaks. Apply
a mixture of liquid soap
and water to all joints.
Bubbles forming show a
leak. Correct all leaks at
once.
8. Replace lower front
access panel.
Figure 21 - Orifice
Fan Switch
(Off/On/Auto)
Auto
BLOWER
WIRING
DIAGRAM
(For Models With
Blower Assembly)
Off
On
Fan
Switch
(N.O.)
Red
Black
Blue
Black
Blower
Motor
110/115 V.A.C.
Black
Red
White
Green
White
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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
35,000 BTU/Hr 50,000 BTU/Hr 65,000 BTU/Hr
SPECIFICATIONS
Model
Model
Model
BTU
35,000
50,000
65,000
Type Gas
Ignition
Natural Only
Piezo
Natural Only
Piezo
Natural Only
Piezo
Pressure Regulator Setting 3.5" W.C.
Inlet Gas Pressure
3.5" W.C.
3.5" W.C.
Maximum
Minimum
7" W.C.
5" W.C.
7" W.C.
5" W.C.
7" W.C.
5" W.C.
Dimensions, Inches
Heater (H x W x D) 25 x 27 1/4 x 16
Shipping Weight (pounds) 78
28 x 32 1/2 x 16
98
31 x 37 3/4 x 16
120
Flue Vent Size
Orifice Size
4" dia.
4" dia.
5" dia.
34 drill, ø .111
3.8 mm, ø .1496 29 drill, ø .136
Note: These heaters are certified for elevations of 0-4500 feet above sea level. For
elevations above 2000 feet, de-rate heater 4% for each 1000 feet above sea level.
When gas pressure is too low
• pilot will not stay lit
SERVICE
HINTS
• burner will have delayed ignition
• heater will not produce specified heat
When gas quality is bad
• pilot will not stay lit
• burner will produce yellow 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.
Purchase these heater accessories from your local dealer. If they can not supply
these accessories, contact your nearest Parts Central (see page 32). You can also
write to the address listed on the back page of this manual for information.
ACCESSORIES
BLOWER KIT - PART
NUMBER GA6010
For all models. Provides better
heat distribution. Makes heater
more efficient. Complete
installation and operating
instructions provided with
MANUAL SHUTOFF
VALVE - GA5010
For all models. Manual
shutoff valve with 1/8"
NPT tap.
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Note: Use only original replacement parts. This will protect your warranty cover-
age for parts replaced under warranty.
ORDERING
REPLACEMENT
PARTS
Parts Under Warranty
Contact Vanguard dealer or call DESA International’s Technical Service Depart-
ment at 1-800-323-5190. When calling 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 Vanguard dealer. If they can’t supply original replacement part(s), either
contact your nearest Parts Central (below) or 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
These Parts Centrals are privately owned businesses. They have agreed to support
our customer’s needs by providing original replacement parts and accessories. For
certain parts, some Parts Centrals may refer you to a dealer in your area. When
calling a Parts Central, ask for the Parts Department.
PARTS
CENTRALS
Howard Industries
1514 South Maple Ave.
Los Angeles, CA 90015
213-747-5121
Washer Equipment Co.
1715 Main Street
Kansas City, MO 64108
KS, MO, AR
Warmer Image/Halco
Enterprises
208 Carter Dr., Unit 21
West Chester, PA 19382
215-696-2670
816-842-3911
Victor Manufacturing
42 Rumsey Road
1-800-368-0803
Controls, Inc.
E. Hartford, CT 06108
NY, NJ, DE, PA, MD
203-289-4223
6820 Glenwood Ave.
Raleigh, NC 27612
NC, SC, VA, MD
919-787-2242
LaPorte’s Parts & Service
2444 North 5th Street
Hartsville, SC 29550
803-879-3009
Controlled Engineering
299 Roosevelt Road
Glen Ellyn, IL 60137
708-469-7300
1-800-334-5886
Cans Unlimited, Inc.
P. O. Box 645
Taylor, SC 29687
All States
803-879-3009
1-800-845-5301
Tarantin Tank Co.
P.O. Box 6129
Freehold, NJ 07728
908-780-9340
Portable Heater Parts
342 N. County Rd 400E
Valparaiso, IN 46383
All States
219-462-7441
1-800-362-6951
800-922-0724
East Coast Energy
707 Broadway
W. Long Branch, NJ 07764
908-870-8809
Dealers LP Equip. Co.
P.O. Box 341145
Bartlett, TN 38184
Al, TN
901-386-8780
800-428-8902
FBD
1-800-755-8809
601 Hope Street
Bowling Green, KY 42101
502-796-8406
800-654-8534
ATP Services
990 Avenue of Americas
New York, NY 10018
212-967-6255
Capitol Hydronic Supply
104 West Jefferson Street
Falls Church, VA 22046
703-416-8555
American Air Dist.
537 W. 62nd Street
Shreveport, LA 71108
318-861-0634
Dayton Hardware
P. O. Box 275
North Dayton Station
Dayton, OH 45404
All States
Tuco Industrial Products
P.O. Box 5076
Lynwood, WA 98046
206-743-9533
Master Service Center
1184 Wilson
Grand Rapids, MI 49504
616-791-4760
513-258-3721
OH only 1-800-762-3426
1-800-735-1268
Central Air Supply
424 North Rockwell
Oklahoma City, OK 73127
405-495-0014
Auer Steel & Heating Supply
2935 W. Silver Spring Dr.
Milwaukee, WI 53209
414-463-1234
800-446-1446
32
100749
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Thislistcontainsreplaceablepartsusedinyourheater. Whenorderingparts, followthe
instructions listed under Ordering Replacement Parts on page 32 of this manual.
ILLUSTRATED
PARTS LIST
Cabinet
5
Assembly
7
6
8
4
3
5
2
5
1
PART NUMBER FOR
KEY
NO.
GVC65NA
GVC50NA
GVC35NA
DESCRIPTION
QTY.
1
2
3
4
5
100202-03
098304-01
100202-02
098304-01
100046-02BS
100049-02BP
M11084-26
——
100202-01
098304-01
100046-01BS
100049-01BP
——
Lower Front Panel
Screw, #10-24 x 3/8"
Screen Bottom Trim
Grill Assembly
1
2
100046-03BS
100049-03BP
M11084-26
——
1
1
Screw, #10-16 x 3/8"
Screw, #10-16 x 3/8"
Cabinet Assembly
Cabinet Back
22
23
1
M11084-26
100203-01
100101-01BS
099997-01
6
7
8
100203-03
100101-03BS
099997-01
100203-02
100101-02BS
099997-01
1
Switch Plug
1
PARTS AVAILABLE - NOT SHOWN
099988-01
100157-01
099988-01
099988-01
Lighting Instructions
Decal, English
1
100157-01
100157-01
Lighting Instructions
Decal, French
1
1
1
099987-01
100154-01
099987-01
100154-01
099987-01
100154-01
Control Position Decal
Warning Decal
33
100749
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ILLUSTRATED
PARTS LIST
Burner
Assembly
1
2
3
4
27
7
50 and 65
Models
11
6
35 Model
Only
7
6
8
5
22
10
11
23
25
9
12
26
24
13
14
15
21
20
17
16
19
16
4
18
17
34
100749
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Thislistcontainsreplaceablepartsusedinyourheater. Whenorderingparts, followthe
instructions listed under Ordering Replacement Parts on page 32 of this manual.
PARTS LIST
Burner
Assembly
PART NUMBER FOR
KEY
NO.
GVC65NA
100729-06
098324-02
097159-02
098271-05
099974-03
100482-01
——
GVC50NA
100729-05
098324-02
097159-02
098271-05
099974-02
100482-01
——
GVC35NA
100729-04
098324-02
097159-02
098271-05
099974-01
063014
DESCRIPTION
Combustion Chamber
Control Knob
QTY.
1
1
2
1
3
Piezo Ignitor
1
4
Ignitor Cable
1
5
Control Rod
1
6
Limit Switch Bracket
Screw, #10-16 x 3/8"
Wire Assembly
Cotter Pin
1
7
M11084-26
099986-01
100000-01
231940
3
8
099986-02
100000-01
231939
099986-01
100000-01
231939
1
9
1
10
11
Limit Switch
1
M11084-38
——
M11084-38
——
——
Screw, #8-18 x 3/8"
Screw, #8-18 x 3/8"
Screw, #10-16 x 2 1/4"
Control Valve
Elbow
3
M11084-38
099211-01
100207-01
098265-01
098936-02
100028-02
100307-01
099976-02
530988
2
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
099211-01
100207-01
098265-01
098936-02
100028-02
100307-01
099976-02
530988
099211-01
100207-01
098265-01
098936-02
100028-02
100307-01
099976-02
530988
2
1
1
Thermocouple Interrupter
Pilot Tubing
1
1
Thermocouple
Burner Tube
1
1
Control Bracket
Orifice Holder
Orifice
1
100309-01
180257
100309-01
180245
100309-01
180233
1
1
100706-01
100310-01
100308-01
M12461-25
098249-01
100090-01
100385-01
100310-01
100308-01
M12461-25
098249-01
100090-01
100384-01
100310-01
100308-01
M12461-25
098249-01
100090-01
Burner
1
Pilot Mounting Bracket
Pilot
1
1
Screw, #10-32 x 1/4"
Nut, M5 x 0.8
2
2
Burner Bracket
1
35
100749
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WARRANTY INFORMATION
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 VENTED NATURAL GAS HEATERS
LIMITED ONE YEAR WARRANTY
This DESA product is warranted to the original purchaser to be free from defect in material and workmanship under normal use and
maintenance for a period of one year from the date of installation whether or not actual use begins on that date. It is the responsibility
of the consumer/owner to establish the warranty period. You are required to furnish proof of installation date, which may be a Bill of
Sales or other payment record which verifies the original installation. A new or remanufactured part to replace any defective part will
be provided, at DESA’s sole option, without charge for the part itself, FOB the shipping point. The exchanged part will be warranted
for only the unexpired portion of the original warranty. Defective parts must be returned to DESA, transportation charges prepaid,
(DESAisnotresponsibleforanyfreightcharges),whereDESAwillestablishtoitssolesatisfactionthatthepartwasorbecamedefective
under normal use and maintenance. This warranty provides a labor allowance to restore the product to proper operating condition. No
reimbursementwillbemadefortransportation,diagnostics,shipping,handling,orotherincidentalexpenses.Thiswarrantyappliesonly
to the product in its original installation location and is voided if the product is reinstalled elsewhere.
LIMITED FIVE YEAR WARRANTY ON COMBUSTION CHAMBER
During the second through fifth years after the date of original installation, DESA further warrants the combustion chamber against
defects in material and workmanship under normal use and maintenance. A replacement combustion chamber will be provided under
the same conditions as stated in the one year warranty.
LIMITED TEN YEAR WARRANTY ON STAINLESS STEEL BURNER
During the second through tenth years after the date of original installation, DESA further warrants the stainless steel burner against
defects in material and workmanship under normal use. Should the burner ever need to be replaced due to a defect in material or
workmanship, it will be exchanged free of charge upon return of the defective burner to DESA International, freight prepaid, along with
the model and serial number of the heater. The burner will not be warranted if broken, altered, or modified in any way. This warranty
does not include damages or repairs caused by floods, corrosive atmosphere, abuse, misapplication, unreasonable use, improper
servicing, improper operation, or failure to provide reasonable and necessary maintenance. Any and all freight and labor charges
incurred are not covered by this warranty and shall be borne by the owner/user.
LIMITATION OF WARRANTIES
All implied warranties (including implied warranties of merchantability) are hereby limited in duration to the period for which each
limited warranty is given. Some states do not allow limitations on how long an implied warranty lasts so the above limitations may not
apply to you. The expressed warranties made in this warranty are exclusive and may not be altered, enlarged, or changed by any
distributor, dealer, or other person whomsoever.
DESA WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the owner’s operation and installation manual including cleaning of component parts; such as,
orifices and burners.
2. Failure to start and/or operate due to voltage or gas condition, blown fuses, open circuit breakers, loose or disconnected wires, low
gas pressure, or other damages due to inadequacy or interruption of electrical service or gas supply.
3. Damage or repairs required as a consequence of faulty or incorrect installation not in conformance with DESA instructions.
4. Damage as a result of floods, winds, lightning, accidents, corrosive atmosphere, or other conditions beyond the control of DESA.
5. Parts or accessories not supplied by DESA.
6. Costs incurred in gaining access to the heater.
7. Damage or repairs needed as a consequence of any misapplication, abuse, unreasonable use, unauthorized alteration, improper
servicing, improper operation, or failure to provide reasonable and necessary maintenance.
8. Freight charges incurred from parts replacement.
9. DESA product installed outside the Continental U.S.A., Alaska, and Canada.
10. DESA products whose serial number has been altered, defaced, or removed.
11. Fuel or electricity costs or increases in such costs from any reason whatsoever.
12. Any special, indirect or consequential property, economic, or commercial damage of any nature whatsoever. Some states do not
allow the exclusion of incidental or consequential damages, so the above limitation may not apply to you.
No representative, dealer, or other person is authorized to assume for DESA International any additional, different, or other liability
in connection with the sale of this DESA product.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
For more information about this warranty, write:
2701 Industrial Drive
P.O. Box 90004
Bowling Green, KY 42102-9004
100749-01
REV. D
12/94
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