Desa Flame-Max VYD24 Specification sheet
For more information, visit www.desatech.com
WARNING: If the information in this manual is not
— WHAT TO DO IF YOU SMELL GAS
-
UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL
FLAME-MAX®GOLDEN OAk LOG DESIGN
Remote-Ready Models VYD18(N,P)RB, VYD24(N,P)RB and VYD30(N,P)RB
FLAME-MAX®VINTAGE OAk LOG DESIGN
Variable Manually-Controlled Models VYS18(N,P)B and VYS24(N,P)B
P
I
L
O
T
O
F
F
O
N
LO
OFF
ON
AUTO
HI
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SAFETY
TABLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 5
Product Identication........................................... 5
Optional Remote Control Accessories................. 5
Unpacking............................................................ 5
Air for Combustion and Ventilation ...................... 6
Product Features................................................. 6
Installation ........................................................... 8
Operation........................................................... 18
Inspecting Burners............................................. 23
Cleaning and Maintenance................................ 24
Replacement Parts............................................ 25
Wiring Diagram.................................................. 25
Troubleshooting................................................. 26
Specications .................................................... 30
Service Hints ..................................................... 30
Technical Service............................................... 30
Accessories ....................................................... 31
Parts .................................................................. 32
Warranty .............................................Back Cover
alteration, service or
maintenance can cause
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for correct installation
-
additional information
-
-
masonry or UL127 fac-
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in accordance with ANSI
includes instructions stat-
WARNING: This is an
-
from the room in which
and ventilation air must
Air
for Combustion and Ven-
tilation
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stalled in an aftermarket,*
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113093-01H 3
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known to the state of California
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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.
this heater or its controls can
WARNING: Do not use a
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SAFETY
Continued
WARNING: Do not allow fans
will remain hot for a time after
-
dren when they are in the room
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-
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SAFETY
Continued
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).
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 re department
4. This heater shall not be installed in a bed-
room or bathroom, unless installed as a
vented appliance. See Installing Damper
Clamp Accessory for Vented Operation,
page 12. This gas log set may not be
installed as a vented appliance in a bed-
room or bathroom in the Commonwealth
of Massachusetts.
5. 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.
6. Do not burn solid-fuel in a masonry or
UL127 factory-built replace in which a
vent-free room heater is installed.
7. 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.
8. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 24.
9. 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 and furniture.
10. This heater needs fresh, outside air venti-
lation to run properly. This heater has an
Oxygen Depletion Sensing (ODS) safety
shutoff system. The ODS shuts down the
heater if enough fresh air is not available.
See Air for Combustion and Ventilation,
page 6. If heater keeps shutting off, see
Troubleshooting, page 26.
11. Do not run heater
• where ammable liquids or vapors are
used or stored
• under dusty conditions
12. Do not use this heater to cook food or burn
paper or other objects.
13. 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.
14. Do not operate heater if any log is broken.
Do not operate heater if a log is chipped
(dime-sized or larger).
15. Turn heater off and let cool before ser-
vicing, installing or repairing. Make sure
the selector switch is in the OFF position
(Remote-Ready Models Only). Only a
qualied service person should install,
service or repair heater.
16. Make sure the selector switch is in the
OFF position when you are away from
home for long periods of time (Remote-
Ready Models Only).
17. Operating heater above elevations of
4,500 feet may cause pilot outage.
18. To prevent performance problems, do not
use propane/LP fuel tank of less than 100
lb. capacity (propane/LP units only).
19. Provide adequate clearances around air
openings.
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113093-01H 5
PRODUCT IDENTIFICATION
Optional
Remote
Control
Piezo
Ignitor
Base
Assembly
Flame-Max®Vintage Oak
Logs One Piece Log Set
Figure 1 - Product Identication
Flame-Max®Golden
Oak Logs Three
Piece Log Set
Control
Knob
Piezo
Ignitor
Flame
Adjustment
Knob
Optional
Selector
Switch
Control
Knob
Base
Assembly
OPTIONAL REMOTE
CONTROL ACCESSORIES
There are four optional remote controls that can
be purchased separately for Remote-Ready
Models Only:
• wall switch • wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 31.
The wall thermostat or hand-held thermostat
may not be used where vented decorative
listing is required.
State of Massachusetts: The installation
must be made by a licensed plumber
or gas fitter in the Commonwealth of
Massachusetts.
Sellers of unvented propane or natural
gas-fired 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.
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
Note: Where listed vented decorative logs
are required, thermostat operation is not
permitted.
UNPACkING
CAUTION:Do not removedata
1. Remove logs and heater base assembly
from carton.
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 Heating, LLC
at 1-866-672-6040 for replacement parts
before returning to dealer.
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AIR FOR COMBUSTION AND VENTILATION
PRODUCT FEATURES
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
both realistic ames and glowing coals. 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 heat-
ers. This heater may also be operated as a
vented decorative (ANSI Z21.60) product by
opening the ue damper.
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.
This heater has a piezo ignitor. This system re-
quires no matches, batteries or other sources
to light heater.
WARNING: This heater shall
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. Dur-
ing heating months, home owners want their
homes as airtight as possible.
While it is good to make your home energy
efcient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning ap-
pliances 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 6 through 8 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.
construction where:
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-112
and
and
If your home meets all of the three criteria
above, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 8.
If your home does not meet all of the three
criteria above, proceed to Determining Fresh-
Air Flow For Heater Location, page 7.
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113093-01H 7
AIR FOR COMBUSTION AND VENTILATION
Continued
The 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 per hour (4.8 m3 per kw) of the ag-
gregate 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 per hour (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 un-
conned 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 heater plus any adjoining rooms with
doorless passageways or ventilation grills
between the rooms.
1. Determine the volume of the space (length
x width x height).
Length x Width x Height =__________cu. ft.
(volume of space)
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2560 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: 2560 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
* 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 of Btu/Hr used)
Example: 51,200 Btu/Hr (maximum the
space can support)
73,000 Btu/Hr (actual amount of
Btu/Hr used)
The space in the above example is a conned
space because the actual Btu/Hr used is more
than the maximum Btu/Hr the space can sup-
port. 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, page 8.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
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.
WARNING:Iftheareainwhich
-
National Fuel
Gas Code,ANSI Z223.1/NFPA 54,
the International Fuel Gas Code,
40,000
33,000
73,000
www.desatech.com 113093-01H8
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 3 - Ventilation Air from Outdoors
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
INSTALLATION
This fresh air would come from an adjoining
unconned 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.
Figure 2 - Ventilation Air from Inside
Building
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.
NOTICE: This heater is intended
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NOTICE:State orlocalcodesmay
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WARNING: Make sure the
selector switch is in the OFF
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113093-01H 9
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WARNING: Seal any fresh
air vents or ash clean-out doors
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WARNING: Never install the
heater
unless installed as a vented
INSTALLATION
Continued
CAUTION: This heater cre-
currents move heat to wall sur-
heater next to vinyl or cloth wall
-
the air exist, may discolor walls
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 6.
Use the correct gas type (natural or propane/
LP) for your unit. If your gas supply is not cor-
rect, do not install log set. Call dealer where
you bought log set for proper type replace.
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INSTALLATION AND CLEARANCES
WARNING: Maintain the
Carefully follow these instructions. This will
ensure safe installation into a masonry, UL127-
listed manufactured replace or listed vent-free
rebox.
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INSTALLATION
Continued
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 cabinet (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".
NOTICE: Manual control heaters
If so, you must always run heater
Installing Damper
Clamp Accessory for Vented
Operation
Size
Front
Width
Rear *
Width
18" 17" 14" 24" 20"
24" 17" 14" 28" 21"
30" 17" 14" 34" 24"
* Measured at 14" depth.
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16 inches from Side Wall
*
Example
Clearances
Note: If using a mantel proceed to If Using
Mantel, page 11. If not using a mantel, follow
the information on this page.
You must have noncombustible material(s)
above the replace opening. Noncombustible
materials (such as slate, marble, tile, etc.) must
be at least 1/2 inch thick. With sheet metal, you
must have noncombustible material behind
it. Noncombustible material must extend at
least 8" up (for all models). If noncombustible
material is less than 12", you must install
the replace hood accessory (24" and 30"
Models Only). See Figure 5 for minimum
clearances.
Material Distance
Installation
12" or more Noncombustible material
okay.
Between 8" and
12"
24" or 30" Models: Install
replace hood accessory
(GA6050, GA6052 or
GA6053 see Accesso-
ries, page 31).
18" Model: Noncombus-
tible 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.
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace
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113093-01H 11
INSTALLATION
Continued
Minimum
Noncombustible
Material
Minimum Non-
Combustible
Material Height
Distances to
Underside of
Mantel
T o p of
Fireplace
Opening
Underside of
Mantel Shelf
Mantel Shelf
12"
8"
(A)
18"
8"
20"
14"
22"
17"
24"
20"
Log Set
24"/30"
Models
18" Model
2 ½"
6"
8"
10"
Figure 6 - Minimum Mantel Clearances
Without Using Hood
Minimum
Noncombustible
Material
8"
Min.
12" 15" 18" 20"
2½"
6"
8"
10"
12"
Distances to
Underside of
Mantel
Hood
(GA6050,
GA6052 or
GA6053)
To p of
Fireplace
Opening
Underside
of Mantel
Shelf
Mantel Shelf
Figure 7 - Minimum Mantel Clearances
When Using Hood
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 behind it.
Noncombustible material must extend at least
8 inches up (for all models). If noncombustible
material is less than 12", you must install the
replace hood accessory (24" and 30" Mod-
els Only). 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, page 10, and Figures 6
and 7 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 12.
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
listed below, 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 when using hood.
minimum clearances shown in
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
-
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INSTALLATION
Continued
14"
Min.
Combustible
Material
Noncombustible Material
Figure 8 - Minimum Fireplace Clearances
If Installed at Floor Level
Figure 9 - Minimum Fireplace Clearances
Above Combustible Flooring
Noncombustible Material
Hearth
5"
Min.
Combustible
Material
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).
Round Flues
Diameter Area
5" 20 sq. in.
6" 29 sq. in.
7" 39 sq. in.
8" 51 sq. in.
Chimney
6' to 15' 39 sq. in.
15' to 30' 29 sq. in.
Figure 10 - Attaching Damper Clamp
Damper
Damper
Clamp
Damper
Damper
Clamp
Damper
Note: When used as a vented heater, ap-
pliance must be installed only in a solid-fuel
burning fireplace with a working flue and
constructed of noncombustible material.
For Massachusetts Residents Only: Instal-
lation of this vented gas log set in the Com-
monwealth of Massachusetts requires 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.
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
31). This will insure vented operation (see Fig-
ure 10). The damper clamp will keep damper
open. Installation instructions are included
with clamp accessory.
See chart for minimum permanent ue open-
ing you must provide.Attach damper clamp so
the minimum permanent ue opening will be
maintained at all times.
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113093-01H 13
WARNING: You must secure
not, heater will move when you
-
-
-
IMPORTANT: Make sure the heater burners
are level. If heater is not level, heater will not
work properly.
Installation Items Needed
• hardware package (provided with heater)
• approved exible gas hose and ttings
(provided) (if allowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• electric drill with 3/16" drill bit (metal or
masonry as applicable)
• athead screwdriver
• pipe wrench
1. Apply pipe joint sealant lightly to male
threads of gas fitting (provided). For
Variable Manually-Controlled Models,
connect approved exible gas hose to gas
regulator of heater (see Figure 11). For
Remote-Ready models connect approved
exible gas hose to gas control tting in
heater (see Figure 12).
IMPORTANT: Hold gas regulator with
wrench when connecting exible gas hose
(Variable Manually-Controlled Models
Only). Hold gas tting with wrench when
connecting exible gas hose (Remote-
Ready Models Only).
2. Locate two masonry screws in hardware
package.
3. Place heater base in replace.
4. Place logs in their proper position on heater
base (see Installing Logs, page 17).
5. Center heater base and logs front-to-back
and side-to-side in replace.
6. Carefully remove logs without moving
heater base.
7. Mark screw locations through one hole on
each side of the mounting bracket (see
Figure 13, page 14). If installing in a brick-
bottom replace, mark screw locations in
mortar joint of bricks.
8. Remove heater base from replace. If
installing optional control accessories,
do so at this time (Remote-Ready Models
Only). Follow all directions provided with
accessory.
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).
Heater Gas
Regulator
Flexible Gas Hose
(Provided) (if allowed by
local codes)
Figure 11 - Attaching Flexible Gas
Hose to Heater Gas Regulator (Variable
Manually-Controlled Models Only)
Figure 12 - Attaching Flexible Gas Hose
to Heater (Remote-Ready Models Only)
Fitting
Flexible Gas
Hose (Provided)
(if allowed by
local codes)
Fitting
INSTALLATION
Continued
www.desatech.com 113093-01H14
INSTALLATION
Continued
-
CAUTION: Never connect
-
WARNING: Never connect
Figure 13 - Attaching Base to Fireplace
Floor (Variable Manually-Controlled
Models Only)
Masonry
Screw
Bracket
with Screw
Holes
Installation Items Needed
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
14. Pointing the vent down protects it from
freezing rain or sleet.
CAUTION: Use only new,
-
Propane/LP
Supply Tank External
Regulator
Figure 14 - External Regulator With Vent
Pointing Down
Vent
Pointing
Down
www.desatech.com
113093-01H 15
Figure 15 - Gas Connection (Variable
Manually-Controlled Models Only)
Tee Pipe Cap
Joint Nipple
3" Minimum
From External
Regulator (11" W.C.**
to 14" W.C. Pressure)
NATURAL
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
CSA Design-Certied
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
Sediment Trap
Gas
Regulator
INSTALLATION
Continued
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 15 or 16, depending on your model).
IMPORTANT: Install equipment shutoff 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 15 or Figure
16, page 15, depending on your model. Lo-
cate 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
contaminants. This keeps them from going
into heater controls. If sediment trap is not
installed or is installed wrong, heater may
not run properly.
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer.
** Minimum inlet pressure for purpose of input
adjustment.
Figure 16 - Gas Connection (Remote-
Ready Models Only)
Gas
Control
3” Minimum
CSA Design-
Certied Equipment
Shutoff Valve With
1/8" NPT Tap*
Approved
Flexible
Gas Hose (if
allowed by
local codes)
From External
Regulator (11"
W.C.** to 14" W.C.
Pressure)
NATURAL
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Cap Pipe Tee
Nipple Joint
Sediment Trap
www.desatech.com 113093-01H16
INSTALLATION
Continued
CHECKING GAS CONNECTIONS
and connections, internal and
external to unit, for leaks after
WARNING: Never use an
-
CAUTION: Make sure exter-
-
der Connecting to Gas Supply,
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 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.
4. Check all joints of gas supply piping system.
Apply 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.
1. Close equipment shutoff valve (see
Figure 17).
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 equipment
shutoff valve for natural gas or propane/LP
supply to equipment shutoff valve for pro-
pane/LP (see Figures 18 and 19, page 16).
Apply noncorrosive leak detection uid to
all joints. Bubbles forming show a leak.
4. Correct all leaks at once.
Figure 17 - Equipment Shutoff Valve
Open
Closed
Equipment
Shutoff
Valve
Figure 18 - Checking Gas Joints
(Propane/LP Model Shown)
Gas Control
Valve Location
Propane/LP
Supply Tank
Equipment
Shutoff Valve
Figure 19 - Checking Gas Joints (Natural
Gas Only)
Gas Meter
Gas Control Valve
Location
Equipment
Shutoff Valve
www.desatech.com
113093-01H 17
Figure 20 - Installing Vintage Oak One-
Piece Log Set
One Piece
Log Set
Chassis
Burner
“U”-shaped
Cutout in
Chassis
INSTALLATION
Continued
CONNECTIONS
1. Open equipment shutoff valve (see
Figure 17, page 16).
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 (Manually-Controlled
Models) or to gas control (Remote-Ready
Models) (see Figures 18 and 19, page 16).
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 18 for
Manually-Controlled Models or page 20
for Remote-Ready Models). Check all
other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to
Appliance, page 19 for Manually-Con-
trolled Models or page 21 for Remote-
Ready Models).
INSTALLING LOGS
CAUTION: After installa-
With the heater set to HI, check
-
It is very important to install the logs exactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
1. Place one piece log set on grate to t as
illustrated in Figure 20. Make sure bottom
of front log is in front of “U”-shaped cutout in
center of chassis (see Figure 20). IMPOR-
TANT: Make sure log does not cover any
burner ports (see Figure 22, page 18).
2. Place lava rock around base of heater if
desired.
1. Place back log #1 on grate to t as il-
lustrated in Figure 21. Make sure middle
section at bottom of log set is seated into
“U”-shaped cutout in center of chassis
(see Figure 21,). IMPORTANT: Make sure
log does not cover any burner ports (see
Figure 22, page 18).
Figure 21 - Installing Golden Oak Log Set
Chassis
Crossover
Log #3
Burner
Front
Log #2 Back
Log #1
Grate
Prongs
www.desatech.com 113093-01H18
INSTALLATION
Continued
Burner
Ports
Figure 22 - Installing Log Set, Top View
(Logs will vary from illustration)
OPERATION
MANUALLY-CONTROLLED MODELS
LIGHTING
INSTRUCTIONS
WARNING:
-
erate heater with doors closed,
-
FOR YOUR SAFETY
WARNING: If you do not fol-
low these instructions exactly,
-
WHAT TO DO IF YOU SMELL GAS
-
2. Place front log #2 against front grate
prongs as shown in Figure 21, page 17.
3. Place crossover log #3 on top of front
and back logs as shown in Figure 21,
page 17.
4. Place lava rock around base of heater if
desired.
www.desatech.com
113093-01H 19
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,
page 18.
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, page 18. If you don’t
smell gas, go to the next step.
5. Slightly depress and turn control knob
counterclockwise to the PILOT
position. Keep control knob pressed in
for ve (5) seconds (see Figure 23).
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 light, 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, page 20.
Figure 23 - Control Knob and Ignitor
Button Location
Control Knob
Ignitor Button
OPERATION Continued
MANUALLY-CONTROLLED MODELS
7. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob.
• If control knob does not pop out when
released, contact a qualified service
person or gas supplier for repairs.
Note: If pilot goes out, repeat steps 3
through 7.
8. Slightly depress and turn control knob
counterclockwise to the HI position.
The burner 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.
CAUTION: Do not try to ad-
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.
and HI
CAUTION: Do not try to ad-
TO TURN OFF GAS
1. Press in and turn control knob clockwise
to the HI position.
2. Turn the 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
17, page 16).
www.desatech.com 113093-01H20
OPERATION Continued
MANUALLY-CONTROLLED MODELS
MANUAL LIGHTING
1. Follow steps 1 through 5 under Lighting
Instructions, page 19.
2. Press 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, page 19.
REMOTE READY MODELS
LIGHTING
INSTRUCTIONS
WARNING:
-
erate heater with doors closed,
-
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.
Thermocouple
Ignitor Electrode Pilot
Burner
Figure 24 - Pilot
(Note: Appearance
of pilot assembly
will vary by model.)
FOR YOUR SAFETY
WARNING: If you do not fol-
low these instructions exactly,
-
WHAT TO DO IF YOU SMELL GAS
-
This manual suits for next models
11
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