Desa HDVF3018N Quick start guide
UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
VARIAbLE MANUALLy-
CONTROLLED MODELS
HDVF3018P AND HDVF3018N
OFF
PILOT
HI
LO
For more information, visit www.desatech.com
— WHAT TO DO IF YOU SMELL GAS
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SAFETy
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Refer to Air for Combustion
and Ventilation
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TAbLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 4
Product Identication........................................... 5
Unpacking............................................................ 5
Product Features................................................. 5
Air for Combustion and Ventilation ...................... 5
Installation ........................................................... 8
Operation........................................................... 17
Inspecting Burners ............................................ 19
Cleaning and Maintenance................................ 19
Troubleshooting................................................. 21
Specications .................................................... 24
Replacement Parts............................................ 25
Technical Service............................................... 25
Service Hints ..................................................... 25
Accessories ....................................................... 25
Parts .................................................................. 26
Warranty ..............................................Back Cover
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119421-01E 3
Early signs
of carbon monoxide poisoning resemble the
u, with headaches, dizziness or nausea. If
you have these signs, the heater may not be
working properly. Have
heater serviced. Some people are more af-
fected by carbon monoxide than others. These
include pregnant women, people with heart or
lung disease or anemia, those under the inu-
ence of alcohol and those at high altitudes.
Natural and
propane/LP gases are odorless. An odor-
making agent is added to the gas. The odor
helps you detect a gas leak. However, the
odor added to the gas can fade. 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.
SAFETy
Continued
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1. This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
2. Do not place propane/LP supply tank(s)
inside any structure. Locate propane/LP
supply tank(s) outdoors (propane/LP units
only).
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3. To prevent performance problems, do
not use propane/LP fuel tank of less than
100 lb. capacity (propane/LP units only).
4. 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 sup-
plier’s instructions
• if you cannot reach your gas supplier,
call the re department
5. This heater shall not be installed in a
bedroom or bathroom unless installed as
a vented appliance (see Installing Damper
Clamp Accessory for Vented Operation,
page 11). This gas log set may not be
installed as a vented appliance in a bed-
room or bathroom in the Commonwealth
of Massachusetts.
6. Before installing in a solid fuel burning re-
place, the chimney ue and rebox must
be cleaned of soot, creosote, ashes and
loose paint by a qualied chimney cleaner.
Creosote will ignite if highly heated. A dirty
chimney ue may create and distribute
soot within the house. Inspect chimney
ue for damage. If damaged, repair ue
and rebox before operating heater.
7. Do not burn solid-fuel in a masonry or
UL127 factory-built replace in which a
vent-free room heater is installed.
8. If replace has glass doors, never operate
this heater with glass doors closed. If you
operate heater with doors closed, heat
buildup inside replace will cause glass to
burst. Make sure there are no obstructions
across openings of replace.
9. This log heater is designed to be smoke-
less. If logs ever appear to smoke, turn off
heater and call a qualied service person.
Note: During initial operation, slight smok-
ing could occur due to log curing and
heater burning manufacturing residues.
10. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 19.
11. Before using furniture polish, wax, carpet
cleaner or similar products, turn heater off. If
heated, the vapors from these products may
create a white powder residue within burner
box or on adjacent walls or furniture.
12. This heater needs fresh, outside air ven-
tilation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if not enough fresh air is available.
See Air for Combustion and Ventilation,
page 5. If heater keeps shutting off, see
Troubleshooting, page 21.
13. Do not run heater
• where ammable liquids or vapors are
used or stored
• under dusty conditions
14. Do not use this heater to cook food or burn
paper or other objects.
15. Do not use heater if any part has been ex-
posed to or under water. Immediately call
a qualied service technician to inspect
the room heater and to replace any part
of the control system and any gas control
which has been under water.
16. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped
(dime-sized or larger).
17. Turn heater off and let cool before servic-
ing. Only a qualied service person should
service and repair heater.
18. Operating heater above elevations of
4,500 feet could cause pilot outage.
19. Provide adequate clearances around air
openings.
SAFETy
Continued
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes,
use the latest edition of The National Fuel
Gas Code, ANSI Z223.1/NFPA 54*.
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
The installa-
tion must be made by a licensed plumber
or gas fitter in the Commonwealth of
Massachusetts.
Sellers of unvented propane or natural
gas-red supplemental room heaters shall
provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for
bedroom and bathroom installation in the
Commonwealth of Massachusetts.
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Figure 1 - Vent-Free Gas Log Heater
Base
Grate
Log Set
Control
Knob Burner
Piezo
Ignitor
PRODUCT IDENTIFICATION
Note: Do not pick up heater base assem-
bly by burners. This could damage heater.
Always handle base assembly by grate.
2. Remove all protective packaging applied
to logs and heater for shipment.
3. Check heater for any shipping damage.
If heater is damaged call DESA Heat-
ing, LLC at 1-866-672-6040 for replace-
ment parts before returning to dealer.
UNPACkING
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1. Remove logs and heater base assembly
from carton.
PRODUCT FEATURES
OPERATION
This heater is clean burning. It requires no
outside venting. There is no heat loss out a vent
or up a chimney. Heat is generated by realistic
dancing, yellow ames. This heater is designed
for vent-free operation with ue damper closed.
It has been tested and approved to ANSI
Z21.11.2 standard for unvented heaters. State
and local codes in some areas prohibit the use
of vent-free heaters. This heater may also be
operated as a vented decorative (ANSI Z21.60)
product by opening the ue damper.
SAFETY PILOT
This heater has a pilot with an Oxygen Deple-
tion Sensing (ODS) safety shutoff system. The
ODS/pilot is a required feature for vent-free
room heaters. The ODS/pilot shuts off the
heater if there is not enough fresh air.
PIEZO IGNITION SYSTEM
This heater has a piezo ignitor. This system re-
quires no matches, batteries or other sources
to light heater.
AIR FOR COMbUSTION AND VENTILATION
National Fuel Gas Code, ANSI Z223.1/
NFPA 54, the International Fuel Gas Code,
Today’s homes are built more energy efcient 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.
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While it is good to make your home energy ef-
cient, your home needs to breathe. Fresh air must
enter your home. All fuel-burning appliances need
fresh air for proper combustion and ventilation.
Exhaust fans, replaces, clothes dryers and
fuel burning appliances draw air from the house
to operate. You must provide adequate fresh
air for these appliances. This will insure proper
venting of vented fuel-burning appliances.
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation.
All spaces in homes fall into one of the three
following ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 5 through 7 will help
you classify your space and provide adequate
ventilation.
The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.
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See Ventilation Air From Outdoors
Determining
Fresh-Air Flow for Heater Location
National Fuel Gas Code, ANSI Z223.1/NFPA
54 denes a conned space as a space whose
volume is less than 50 cubic feet per 1,000 Btu/
hr (4.8 m3 per kw) of the aggregate input rating
of all appliances installed in that space and an
unconned space as a space whose volume
is not less than 50 cubic feet per 1,000 Btu/hr
(4.8 m3 per kw) of the aggregate input rating of
all appliances installed in that space. Rooms
communicating directly with the space in which
the appliances are installed*, through openings
not furnished with doors, are considered a part
of the unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Use this work sheet to determine if you have
a conned or unconned space.
Includes the room in which you will install
replace plus any adjoining rooms with door-
less passageways or ventilation grills between
the rooms.
1. Determine the volume of the space (length
x width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2,560 cu. ft.
(volume of space)
If additional ventilation to adjoining room
is supplied with grills or openings, add the
volume of these rooms to the total volume
of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 cu. ft. (volume of space) x
20 = 51,200 (maximum Btu/Hr the space can
support)
3. Add the Btu/Hr of all fuel burning appliances
in the space.
Vent-free replace __________ Btu/Hr
Gas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/Hr
Other gas appliances* + _________ Btu/Hr
Total = _________ Btu/Hr
AIR FOR COMbUSTION AND VENTILATION
Continued
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119421-01E 7
* Do not include direct-vent gas appliances.
Direct-vent draws combustion air from the
outdoors and vents to the outdoors.
Example:
Gas water heater __________ Btu/Hr
Vent-free replace + _________ Btu/Hr
Total = _________ Btu/Hr
4.
Compare the maximum Btu/Hr the space can
support with the actual amount of Btu/Hr used.
_______ Btu/Hr (maximum the space can
support)
_______ Btu/Hr (actual amount used)
Example: 51,200 Btu/Hr (maximum the
space can support)
79,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the example is a conned space
because the actual Btu/Hr used is more than the
maximum Btu/Hr the space can support. You
must provide additional fresh air. Your options
are as follows:
A. Rework worksheet, adding the space of an
adjoining room. If the extra space provides
an unconned space, remove door to adjoin-
ing room or add ventilation grills between
rooms. See Ventilation Air From Inside
Building.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors.
C. Install a lower Btu/Hr replace, if lower Btu/
Hr size makes room unconned.
If the actual Btu/Hr used is less than the maxi-
mum Btu/Hr the space can support, the space is
an unconned space. You will need no additional
fresh air ventilation.
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National Fuel
Gas Code,ANSI Z223.1/NFPA 54,
the International Fuel Gas Code,
This fresh air would come from an adjoining
unconfined space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the oor on the
wall connecting the two spaces (see options 1
and 2, Figure 2). You can also remove door into
adjoining room (see option 3, Figure 2). Follow
the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, Air for Combustion and Ventilation for
required size of ventilation grills or ducts.
AIR FOR COMbUSTION AND VENTILATION
Continued
40,000
39,000
79,000
Figure 3 - Ventilation Air from Outdoors
Figure 2 - Ventilation Air from Inside
Building
Outlet
Air
V e ntilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air V e ntilated
Crawl Space
T o
Crawl
Space
T o Attic
Or
Remove
Door into
Adjoining
Room,
Option
3
Ve ntilation Grills
Into Adjoining Room,
Option 2
Ve ntilation
Grills Into
Adjoining
Room,
Option 1
12"
12"
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
and one within 12" of the oor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
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INSTALLATION
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IMPORTANT:Vent-free heaters add moisture
to the air. Although this is benecial, installing
heater in rooms without enough ventilation
air may cause mildew to form from too much
moisture. See Air for Combustion and Ventila-
tion, page 5.
CHECK GAS TYPE
Use the correct gas type (natural or propane/
LP) for your unit. If your gas supply is not cor-
rect, do not install heater. Call dealer where
you bought heater for proper type heater.
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119421-01E 9
INSTALLATION AND CLEARANCES
MINIMUM FIREPLACE CLEARANCE
Side Wall 16", Ceiling 42"
Height Front
17" 14" 24" 20"
* Measured at 14" depth.
Carefully follow the instructions below. This
will ensure safe installation into a masonry,
UL127-listed manufactured replace or certi-
ed vent-free rebox.
Ceiling
A. Clearances from the side of the replace
cabinet to any combustible material and
wall should follow diagram in Figure 4.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3 1/2" from the wall. This com-
bustible material must be 4" from the side
of the replace opening (see Figure 4).
Note: When installing your gas logs into
a manufactured rebox, follow rebox
manufacturer’s instructions for minimum
clearances to combustible materials.
B. Clearances from the top of the replace
opening to the ceiling should not be less
than 42".
INSTALLATION
Continued
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
Example
*
Installing Damper
Clamp Accessory for Vented
Operation
Note: If using a mantel, proceed to If Using
Mantel, page 10. If not using a mantel, follow
the information below.
You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,
you must have noncombustible material be-
hind it. Noncombustible material must extend
at least 8" up. If noncombustible material is
less than 12", you must install the replace
hood accessory. See Figure 5, page 10 for
minimum clearances.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney ue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 11.
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You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.)
must be at least 1/2" thick. With sheet metal,
you must have noncombustible material be-
hind it. Noncombustible material must extend
at least 8" up. Even if noncombustible material
is more than 12", you may need the hood ac-
cessory to deect heat away from your mantel
shelf. See Figure 5 and 6 and Figure 7 on
page 11 for minimum clearances.
MANTEL CLEARANCES
In addition to meeting noncombustible mate-
rial clearances, you must also meet required
clearances between replace opening and
mantel shelf. If you do not meet the clearances
in Figure 6 you will need a hood.
If you meet minimum clearance between
mantel shelf and top of replace opening, a
hood is not required (see Figure 6).
If minimum clearances in Figure 6 are not
met, you must have a hood. When using a
hood there are still certain minimum mantel
clearances required. Follow minimum clear-
ances shown in Figure 7, page 11 when
using hood.
INSTALLATION
Continued
12" or more Noncombustible material
okay.
Between 8"
and 12"
Noncombustible material
okay.
Less than 8" Noncombustible material
must be extended to at
least 8". See Between
8" and 12", above. If you
cannot extend material,
you must operate heater
with ue damper open.
IMPORTANT: If you cannot meet these mini-
mum clearances, you must operate heater
with chimney ue damper open. Go to Install-
ing Damper Clamp Accessory for Vented
Operation, page 11.
Heat Resistant
Material
(A)
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum
Noncombustible
Material
Minimum
Noncombustible
Material Height
Distances to
Underside of
Mantel
T o p of
Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
8"
(A)
8" 14" 17" 20"
All minimum
distances are
in inches
2 1/2"
6"
8"
10"
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119421-01E 11
Minimum
Noncombustible
Material 8"
Min.
12" 15" 18"
All minimum
distances are
in inches
Log Set
18", 24",
30" Models
20"
2 1/2"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052)
T o p of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
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of the following:
height
INSTALLATION
Continued
Figure 7 - Minimum Mantel Clearances
When Using Hood
14"
Min.
Combustible
Material
Noncombustible
Material
Hearth
5"
Min.
Combustible
Material
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Figure 8 - Minimum Fireplace Clearances
if Installed at Floor Level Figure 10 - Attaching Damper Clamp
Manufactured
Fireplace
Masonry
Fireplace
Damper
Damper
Clamp
Damper
Damper
Clamp
Damper
FLOOR CLEARANCES
A. If installing appliance on the oor level,
you must maintain the minimum distance
of 14" to combustibles (see Figure 8).
B. If combustible materials are less than 14"
to the replace, you must install appliance
at least 5" above the combustible ooring
(see Figure 9).
INSTALLING DAMPER CLAMP
OPERATION
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning replace with a working ue and con-
structed of noncombustible material.
Instal-
lation of this gas log set as a vented appliance
in the Commonwealth of Massachusetts re-
quires the damper be permanently removed
or welded in the fully open position.
If your heater is a manually-controlled model,
you may use this heater as a vented product.
There are three reasons for operating your
heater in the vented mode.
1. The replace does not meet the clearance
to combustibles requirements for vent-
free operation.
2. State or local codes do not permit vent-
free operation.
3. You prefer vented operation.
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6' to 15' 39 sq. inches
15' to 30' 29 sq. inches
If reasons number 1 or 2 apply to you, you
must permanently open chimney ue damper.
You must install the damper clamp accessory
(to order, see Accessories,page 25). This
will insure vented operation (see Figure 10).
The damper clamp will keep damper open.
Installation instructions are included with
clamp accessory.
See chart below for minimum permanent ue
opening you must provide. Attach damper
clamp so the minimum permanent ue open-
ing will be maintained at all times.
INSTALLATION
Continued
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IMPORTANT: Make sure the heater burners
are level. If heater is not level, heater will not
work properly.
• hardware package (provided with heater)
• approved exible gas hose (not provided)
(if allowed by local codes)
• sealant resistant to propane (propane/LP)
gas, not provided
• electric drill with 3/16" drill bit
• athead screwdriver
1. Apply pipe joint sealant lightly to male
threads of the tting to be threaded into
gas regulator. Connect approved exible
gas hose to gas regulator of heater (see
Figure 11).
IMPORTANT: Hold gas regulator with
wrench when connecting exible gas hose.
2. Locate masonry screws in hardware
package.
3.
Position heater base assembly in replace.
4. Place logs in their proper position on heater
base, see Installing Logs on page 15.
5. Center heater base and logs front-to-back
and side-to-side in replace.
6. Carefully remove logs without moving
heater base.
5" 20 sq. inches
6" 29 sq. inches
7" 39 sq. inches
8" 51 sq. inches
Figure 11 - Attaching Flexible Gas Hose
to Heater Gas Regulator
Heater Gas
Regulator
Flexible Gas Hose
(if allowed by local codes)
Fitting
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119421-01E 13
INSTALLATION
Continued
Figure 12 - Attaching Base Assembly to
Fireplace Floor - Dual Burner Model
Masonry
Screw
Mounting
Bracket
CONNECTING TO GAS SUPPLY
Before installing heater, make sure you have
the items listed below.
• external regulator (supplied by installer)
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• equipment shutoff valve *
• test gauge connection *
• sediment trap
• tee joint
• pipe wrench
* A CSA design-certied equipment shutoff
valve with 1/8" NPT tap is an acceptable al-
ternative to test gauge connection. Purchase
the optional CSA design-certied equipment
shutoff valve from your dealer.
For propane/LP units, the installer must
supply an external regulator. The external
regulator will reduce incoming gas pressure.
You must reduce incoming gas pressure to
between 11" and 14" of water. If you do not re-
duce incoming gas pressure, heater regulator
damage could occur. Install external regulator
with the vent pointing down as shown in Figure
13. Pointing the vent down protects it from
freezing rain or sleet.
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Figure 13 - External Regulator With Vent
Pointing Down
Propane/LP
Supply Tank
External
Regulator
with Vent
Pointing
Down
7. Mark screw locations through holes in
mounting brackets (see Figure 12). If
installing in a brick-bottom replace, mark
screw locations in mortar joint of bricks.
8. Remove heater base from replace.
9. Drill holes at marked locations using 3/16"
drill bit.
10. Attach base assembly to replace oor
using two masonry screws (in hardware
package) (see Figure 12).
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Installation must include an equipment shutoff
valve, union and plugged 1/8" NPT tap. Locate
NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see
Figure 14).
IMPORTANT: Install equipment valve in an
accessible location. The equipment shutoff
valve is for turning on or shutting off the gas
to the appliance.
Check your building codes for any special
requirements for locating equipment shutoff
valve to replaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could
result in clogged heater valves.
We recommend that you install a sediment
trap in supply line as shown in Figure 14.
Locate sediment trap where it is within reach
for cleaning. Install in piping system between
fuel supply and heater. Locate sediment trap
where trapped matter is not likely to freeze.
A sediment trap traps moisture and contami-
nants. This keeps them from going into heater
INSTALLATION
Continued
Figure 14 - Gas Connection
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer.
** Minimum inlet pressure for purpose of input
adjustment.
3" Minimum
Sediment Trap
Gas
Regulator
CSA Design-
Certied
Equipment
Shutoff Valve
With 1/8"
NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
Tee Pipe Cap
Joint Nipple
From External Regulator
(11" W.C.** to 14" W.C.
Pressure)
NATURAL
From Gas Meter (5" W.C.**
to 10.5"
W.C.
Pressure)
controls. If sediment trap is not installed or is
installed wrong, heater may not run properly.
CHECKING GAS CONNECTIONS
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Con-
necting to Gas Supply
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
1. Disconnect appliance with its appliance
main gas valve (control valve) and equip-
ment shutoff valve from gas supply piping
system. Pressures in excess of 1/2 psig
will damage heater regulator.
2. Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3. Pressurize supply piping by either opening
propane/LP supply tank valve for propane/
LP gas or opening main gas valve located
on or near gas meter for natural gas or
using compressed air.
4. Check all joints of gas supply piping system.
Apply a noncorrosive leak detection uid to
all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected
ttings for leaks.
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119421-01E 15
INSTALLATION
Continued
1. Close equipment shutoff valve (see Fig-
ure 15).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
3. Check all joints from gas meter to equip-
ment shutoff valve for natural gas or pro-
pane/LP supply to equipment shutoff valve
for propane/LP (see Figures 16 and 17).
Apply noncorrosive leak detection uid to
all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Figure 15 - Equipment Shutoff Valve
Figure 16 - Checking Gas Joints
(Propane/LP Gas Models)
Equipment
Shutoff Valve
Propane/LP
Supply Tank
Control Valve Location
Figure 17 - Checking Gas Joints (Natural
Gas Models)
Gas Meter
Equipment Shutoff Valve
Control Valve Location
Equipment
Shutoff
Valve
Open
Closed
PRESSURE TESTING HEATER GAS
CONNECTIONS
1. Open equipment shutoff valve (see Fig-
ure 15).
2. Open main gas valve located on or near
gas meter for natural gas or open pro-
pane/LP supply tank valve.
3. Make sure control knob of heater is in the
OFF position.
4. Check all joints from equipment shutoff
valve to control valve (see Figures 16 and
17). Apply noncorrosive leak detection uid
to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operation, page 17).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 18).
INSTALLING LOGS
-
-
-
Each log is marked with a number. These
numbers will help you identify the log when
installing. It is very important to install these
logs exactly as instructed. Do not modify logs.
Only use logs supplied with heater.
1.
Place front log (#1) on grate ngers. Make sure
front log rests rmly between grate ngers and
grate base (see Figure 18, page 16).
2.
Place base of middle log (#2) in U-shaped
slots of grate base. The large cutout on bot-
tom right of middle log should t over burner
(see Figure 19, page 16). Make sure front of
middle log is resting on tabs of grate base.
www.desatech.com 119421-01E16
INSTALLATION
Continued
Figure 19 - Installing Middle Log #2
Figure 20 - Installing Back Log #3
Middle
Log (#2)
Tab
Burner
U-Shaped
Slot
Hole in
Grate Base
Pins
Burner
Back
Log (#3)
Figure 18 - Installing Front Log #1
Front
Log (#1)
Grate
Fingers
Grate
Base
3. Locate pins on bottom of back log (#3).
Slide these pins into holes in grate base
behind burner (see Figure 20).
4. Locate holes on bottom of right crossover
log (#4). Slide holes onto right pin on
middle log (#2) and right pin on back log
(#3). See Figure 21 for placement.
5. Locate holes on bottom of middle cross-
over log (#5). Slide holes over middle pin
on middle log (#2) and left pin on back log
(#3). See Figure 21.
6. Locate holes on bottom of left crossover
log (#6). Slide these holes onto left pins
located on middle log (#2) and front log
(#1). See Figure 21.
7. Add lava rock around base of heater if
desired. Do not place any lava rock on
logs or burner.
Figure 21 - Installing Crossover Logs
www.desatech.com
119421-01E 17
OPERATION
LIGHTING
INSTRUCTIONS
WARNING
-
-
-
Note: Home owners generally prefer to oper-
ate their heater with the chimney damper
closed. This will put all the heat into the room.
However, there may be times you will desire
the full ames of the HI heat setting but will
nd the heat output excessive. You can open
the chimney damper (if you have one) fully or
partially to release some of the heat.
1. STOP! Read the safety information in
column 1.
2. Make sure equipment shutoff valve is fully
open.
3. Press in and turn control knob clockwise
to the OFF position.
4. Wait ve (5) minutes to clear out any gas.
Then smell for gas, including near the
oor. If you smell gas, STOP! Follow “B”
in the safety information, column 1. If you
don’t smell gas, go to the next step.
FOR YOUR SAFETY
-
-
WHAT TO DO IF YOU SMELL GAS
-
www.desatech.com 119421-01E18
Figure 22 - Control Knob and Ignitor
Button Location
Ignitor Button Control Knob
Figure 23 - Pilot
Thermocouple
Pilot Burner
Ignitor
Electrode
OPERATION
The variable control valve can be set to any
heat setting and ame height desired, by sim-
ply turning the control knob until that setting
is attained. Even the lowest setting provides
realistic, dancing yellow ames. Selecting
higher settings produces greater heat output.
This results in increased heating comfort.
-
TO TURN OFF GAS
TO APPLIANCE
1. Press in and turn control knob clockwise
to the HI position.
2. Turn control knob clockwise to the
pilot position.
3. Press in control knob and turn clockwise
to the OFF position.
4. Close equipment shutoff valve (see Figure
15, page 15).
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under Lighting
Instructions, page 17.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob. Now follow step 8,
under Lighting Instructions, column 1.
5. Slightly press and turn control knob coun-
terclockwise to the PILOT position.
Press in control knob for ve (5) seconds
(see Figure 22).
Note: You may be running this heater
for the rst time after hooking up to gas
supply. If so, the control knob may need
to be pressed in for 30 seconds or more.
This will allow air to bleed from the gas
system.
6. With control knob pressed in, press and
release ignitor button. This will light pilot.
The pilot is attached to the burner. If
needed, keep pressing ignitor button until
pilot lights.
Note: If pilot does not stay lit, contact a
qualied service person or gas supplier
for repairs. Until repairs are made, light
pilot with match. To light pilot with match,
see Manual Lighting Procedure.
7. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob.
Note: If pilot goes out, repeat steps 3
through 7. If control knob does not pop out
when released, contact a qualied service
person or gas supplier for repairs.
8. Slightly press and turn control knob
counterclockwise to desired heat-
ing level. The burner(s) should light. Set
control knob to any heat level between HI
and LO.
9. To leave pilot lit and shut off burners only,
turn control knob clockwise to the
HI position then press in and turn clock-
wise to PILOT position.
OPERATION
Continued
www.desatech.com
119421-01E 19
INSPECTING bURNERS
Air is drawn into the burner through the holes
in the tting at the entrance to the burner.
These holes may become blocked with dust,
lint or pet hair. Periodically inspect these holes
for any blockage and clean as necessary.
Blocked air holes will create soot.
Periodically inspect all burner ame holes with
the heater running. All slotted burner ame
holes should be open with yellow ame pres-
ent. All round burner ame holes should be
open with a small blue ame present. Some
burner ame holes may become blocked by
debris or rust, with no ame present. If so,
turn off heater and let cool. Remove blockage.
Blocked burner ame holes will create soot.
Figure 24 - Correct Pilot Flame Pattern
Figure 25 - Incorrect Pilot Flame Pattern
Thermocouple
Pilot Burner
Thermocouple
Pilot Burner
CLEANING AND MAINTENANCE
Check pilot ame pattern and burner ame
patterns often.
PILOT FLAME PATTERN
Figure 24 shows a correct pilot ame pattern.
Figure 25 shows an incorrect pilot ame pat-
tern. The incorrect pilot ame is not touching
the thermocouple. This will cause the thermo-
couple to cool. When the thermocouple cools,
the heater will shut down.
If pilot ame pattern is incorrect, as shown
in Figure 25
• turn heater off (see To Turn Off Gas to Ap-
pliance), page 18
• see Troubleshooting, page 21
Note: The pilot ame on natural gas units will
have a slight curve, but ame should be blue
and have no yellow or orange color.
-
-
PILOT AIR INLET HOLE
The primary air inlet holes allow the proper
amount of air to mix with the gas. This pro-
vides a clean burning flame. Keep these
holes clear of dust, dirt, lint and pet hair.
Clean these air inlet holes prior to each
heating season. Blocked air holes will create
soot. We recommend that you clean the unit
every three months during operation and
have heater inspected yearly by a qualied
service person.
We also recommend that you keep the burner
tube and pilot assembly clean and free of dust
and dirt. To clean these parts we recommend
using compressed air no greater than 30 PSI.
Your local computer store, hardware store or
home center may carry compressed air in a
can. If using compressed air in a can, please
follow the directions on the can. If you don’t
follow directions on the can, you could dam-
age the pilot assembly.
www.desatech.com 119421-01E20
1. Shut off unit, including pilot. Allow unit to
cool for at least thirty minutes.
2. Inspect burner, pilot and primary air inlet
holes on injector holder for dust and dirt
(see Figure 26).
3. Blow air through the ports/slots and holes
in the burner.
4. Check the injector holder located at the
end of the burner tube again. Remove
any large particles of dust, dirt, lint or pet
hair with a soft cloth or vacuum cleaner
nozzle.
5. Blow air into the primary air holes on the
injector holder.
6. In case any large clumps of dust have now
been pushed into the burner repeat steps
3 and 4.
Clean the pilot assembly also. A yellow tip on
the pilot ame indicates dust and dirt in the
pilot assembly. There is a small pilot air inlet
hole about 2" from where the pilot ame comes
out of the pilot assembly (see Figure 27). With
the unit off, lightly blow air through the air inlet
hole. You may blow through a drinking straw
if compressed air is not available.
Figure 26 - Injector Holder On Outlet
Burner Tube
Burner
Tube
Primary Air
Inlet Holes
Injector Holder
Figure 27 - Pilot Inlet Air Hole
Burner
Tube
Pilot Assembly
Pilot Air
Inlet Hole
Ports/
Slots
LOGS
• If you remove logs for cleaning, refer to
Installing Logs, page 15, to properly replace
logs.
• Replace log(s) if broken or chipped (dime-
sized or larger).
Periodically inspect all burner ame holes with
the heater running. All slotted burner ame
holes should be open with yellow ame pres-
ent. All round burner ame holes should be
open with a small blue ame present. Some
burner ame holes may become blocked by
debris or rust, with no ame present. If so,
turn off heater and let cool. Remove blockage.
Blocked burner ame holes will create soot.
CLEANING AND MAINTENANCE
Continued
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