Desa Vanguard GVC50NA Quick start guide

Save this manual for future reference.
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.
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.
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.
OWNER’S OPERATION AND INSTALLATION MANUAL
®
VENTED NATURAL
GAS HEATERS
®
Models: GVC65NA, GVC50NA, GVC35NA

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100749
CONTENTS SECTION PAGE
Safety Information.........................................................................3
Product Identification .................................................................... 5
Local Codes ...................................................................................6
Unpacking ....................................................................................6
Product Features ............................................................................ 6
Installing Heater ............................................................................ 6
Check Gas Type...................................................................... 6
Installation Items..................................................................... 6
Locating Heater....................................................................... 7
Venting Heater ........................................................................ 8
Connecting to Gas Supply ...................................................... 11
Checking Gas Connections..................................................... 13
Fresh Air For Combustion and Ventilation...................................14
Determining Fresh-Air Flow for Heater Location
Example 1: Locating Heater in Unconfined (Open) Area 15
Draft Hood Spillage Test............................................ 15
Providing Permanent Fresh-Air Ventilation ..............16
Example 2: Locating Heater in Confined (Closed) Area..17
Ventilating Confined Area .........................................17
Operating Heater ...........................................................................18
For Your Safety Read Before Lighting ..................................18
Lighting Instructions............................................................... 18
Manual Lighting Procedure ....................................................20
Blower Operation (For Models with Blower) ........................20
To Turn Off Gas To Appliance .............................................. 20
Inspecting Pilot and Burner Flame................................................ 21
Pilot Flame Pattern..................................................................21
Burner Flame Pattern ..............................................................21
Cleaning and Maintenance ............................................................ 23
Troubleshooting............................................................................. 24
Service Procedures ........................................................................ 28
Removing Control Valve and Burner Tube............................28
Removing Burner.................................................................... 29
Changing Burner Orifice ........................................................ 30
Blower Wiring Diagram................................................................ 30
Technical Service .......................................................................... 31
Specifications ................................................................................ 31
Service Hints ................................................................................. 31
Accessories ....................................................................................31
Ordering Replacement Parts.......................................................... 32
Parts Centrals................................................................................. 32
Illustrated Parts List ...................................................................... 33-35
Warranty Information.................................................................... Back Cover

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100749
SAFETY
INFORMATION WARNINGS
IMPORTANT: Read this owner’s manual carefully and completely be-
foretrying toassemble,operate, orservice thisheater. Improperuse 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. Getfresh airat 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.
Makecertain you read and understandallWarnings.Keepthis 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. Thisheatermusthave fresh air for proper operation. If not, poor fuel combustion
andimproperventingoffluegases 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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100749
SAFETY
INFORMATION
Continued
WARNINGS Continued
6. Providethe following minimum heater clearances from combustibles (as viewed
from the front of heater):
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
beforeservicing. Onlyaqualified service personshouldservice and repairheater
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
servicepersontoinspecttheheaterandtoreplaceanypartofthecontrolsystemand
any gas control which has been under water.

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100749
PRODUCT
IDENTIFICATION
Figure 1 - Vented Natural Gas Heater
Lower Front
Access Panel
Ignitor
Button
Control
Knob
Figure 2 - Vented Natural Gas Heater, Rear View
Draft Hood
Outlet for
Venting
System
Blower
(on models
equipped with
blower)
Control
Valve

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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:
• 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
LOCAL CODES
UNPACKING 1. Remove heater from carton.
2. Remove all protective packaging applied to heater for shipment.
3. Check heater for any shipping damage. If heater is damaged, promptly inform
dealer where you bought heater.
NOTICE
Thisheatermustbeelectricallygroundedifequippedwith
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).
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.
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.
* 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.
• piping (check local codes)
• sealant (resistant to propane gas)
• manual shutoff valve *
• ground joint union
• test gauge connection * (see
Figure 7, page 12)
• sediment trap
• tee joint
• pipe wrench
• venting materials
PRODUCT
FEATURES
Piezo Ignition System
This heater has a piezo ignitor. This system requires no matches, batteries, or other
sources to light heater.
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.

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100749
INSTALLING
HEATER
Continued
LOCATING HEATER
WARNING
Maintain the minimum clearances shown in Figure 3,
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.
Figure 3 - Heater Clearances
53"
Minimum
CEILING
Left
Side
6"
Minimum
Right
Side
48" Minimum from
Front of Heater
6" Minimum
from Back
12"
Minimum
Continued

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100749
Note: Venting/chimney materials are not supplied with heater.
VENTING HEATER
INSTALLING
HEATER
Continued
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.
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.

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100749
INSTALLING
HEATER
Continued
VENTING HEATER (continued)
WARNING
Do not vent heater in any of the following ways (see Figure 4).
Heater must be vented to the out-
doors. Never vent heater to another
room or inside a building.
The vertical section of vent pipe must
extend at least two feet above the
highest point of any roof within ten
feet.
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.
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.
Vertical run of pipe must be at least
five feet from elbow to elbow.
Figure 4 - Improper Venting Systems
Continued
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;;
Less than 5' between elbows

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100749
VENTING HEATER (continued)
INSTALLING
HEATER
Continued
Proper Size Vent
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.
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.
Figure 5 - Typical Construction of Venting Systems
5'
Min. 6"
Min.
Heater
Vent
Connector
Lock Joints
Vertical Vent
53"
Min.
Maintain Listed
Clearance of
Vent
Lock Joints
Position
Firestop Support
Laterals
Lock
Joints
Support If
Necessary
Maintain Listed
Clearance of Vent
Vent Cap
Must Be At
Least 2 Feet
Above
Highest Point
Within 10
Feet.
Seal Around
Collar and
Flashing
Type-B Vent
Prefabricated or Masonry
All-Fuel Chimney
Heater
Terminate at least 5' above draft hood. If vent extends over
5' above roof, support with guy wires or braces.

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100749
INSTALLING
HEATER
Continued
CONNECTING TO GAS SUPPLY
WARNING
A qualified service person must connect heater to gas
supply. Follow all local codes.
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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100749
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.
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).
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.
INSTALLING
HEATER
Continued
Acceptable
construction
of inlet gas
line
From Gas
Meter (5" W.C.
Min** to 7"
W.C. Max)
From
Gas
Meter (5"
W.C.
Min** to
7" W.C.
Max)
Pipe
Nipple
Tee Joint
Cap
Manual
Shutoff
Valve *
Ground
Joint
Union
Tee Joint
1/8" NPT
Plug Tap
Reducer
Bushing to
1/8" NPT
Test
Gauge
Connection*
Preferred
construction
of inlet gas
line
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.
Sediment
Trap
Control
Valve
CAUTION
Use pipe joint sealant that is resistant to liquid petro-
leum (LP) gas.

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100749
INSTALLING
HEATER
Continued
CHECKING GAS CONNECTIONS
WARNING
Test all gas piping and connections for leaks after install-
ing or servicing. 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).
P
O
On Position
Off Position
Figure 8 - Manual Shutoff Valve
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.

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100749
FRESH AIR FOR
COMBUSTION
AND
VENTILATION
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.
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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100749
FRESH AIR FOR
COMBUSTION
AND
VENTILATION
Continued
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Example 1: Locating Heater in Unconfined (Open) Area
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).
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.
Typical
Water
Heater
Match
Draft Hood
Vent Pipe
Heater
Match
Draft Hood
Opening
Vent Pipe
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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100749
FRESH AIR FOR
COMBUSTION
AND
VENTILATION
Continued
Figure 10 - Ventilation Air from Outdoors
Draft Hood Spillage: This is a hazardous situation. Draft hood spillage re-
leases poisonous carbon monoxide gas into your home.
DANGER
Carbon monoxide poisoning may lead to death!
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
occursortherewasnoblockage,youneedmorefresh,outsideairinthehouse.You
must provide additional fresh-air ventilation. Follow the steps below at once.
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 exhaustfans.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 Outlet
Air Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic

17
100749
FRESH AIR FOR
COMBUSTION
AND
VENTILATION
Continued
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.
Figure 11 - Ventilation Air from Inside Building
Example 2: Locating Heater in Confined (Closed) Area
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.
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.
Ventilation
Grills into
Closet for
Hot Water
Heater
Recommended
Fresh Air Duct
into Crawl Space in
Furnace Area or in
Closet with Water Heater
Ventilation Grills
Connecting Two Rooms
to Meet Unconfined Space
12"
12"

18
100749
OPERATING
HEATER
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.
PILOT
VEILLEUSE
HIGH
HAUT
LOW
BAS
DEPRESS
FOR OFF
APPUYER POUR
ARRÊTER
Figure 12 - Control Knob and Ignitor Button
Ignitor Button
Control Knob
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.
NOTICE
If operating heater for the first time, a slight odor will occur.
This odor will go away after a few hours of operation.
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.

19
100749
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.
6. Remove lower front access panel on heater.
7. Turn control knob clockwise
Clockwise
to the PILOT position. Fully depress
control knob for five seconds.
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 C-clockwise to desired setting.
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
OPERATING
HEATER
Continued
Continued

20
100749
MANUAL LIGHTING PROCEDURE
1. Remove lower front access panel on heater.
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)
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.
OPERATING
HEATER
Continued
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.