Desa L32LHN User manual
UNVENTED (VENT-FREE) FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
MANUALLY CONTROLLED MODELS
NATURAL GAS
(V)L32(HN, LHN), (V)L36(EN, LEN)
PROPANE/LP GAS
(V)L32(HP, LHP), (V)L36(EP, LEP)
REMOTE CONTROL READY MODELS
NATURAL GAS
(V)L36(ZNR, LZNR), (V)L42(ZNR, LZNR)
PROPANE/LP GAS
(V)L36(ZPR, LZPR), (V)L42(ZPR, LZPR)
For more information, visit www.desatech.com
WARNING: If the information in this manual is not
— WHAT TO DO IF YOU SMELL GAS
-
www.desatech.com 115254-01B2
SAFETY
alteration, service or
maintenance can cause
-
for correct installation
-
additional information
-
WARNING: FOR USE
ONLY WITH A LISTED
DECORATIVE TYPE
UNVENTED ROOM HEAT-
-
stalled in an aftermarket,*
-
chemicals known to the state
of California to cause cancer or
-
TAbLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 4
Product Features................................................. 5
Product Specications......................................... 5
Locating Firebox.................................................. 7
Air For Combustion and Ventilation..................... 7
Installation ........................................................... 9
Operation........................................................... 19
Inspecting Burners............................................. 25
Cleaning and Maintenance................................ 26
Troubleshooting................................................. 27
Specications .................................................... 31
Wiring Diagram.................................................. 31
Parts .................................................................. 32
Replacement Parts............................................ 40
Service Hints ..................................................... 40
Technical Service............................................... 40
Accessories ....................................................... 41
Warranty ..............................................Back Cover
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115254-01B 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 affected by carbon monoxide than oth-
ers. These include pregnant women, people
with heart or lung disease or anemia, those
under the inuence 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
-
WARNING: Do not allow fans
-
-
away from hot surfaces to avoid
-
-
dren when they are in the room
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-
-
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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).
SAFETY
Continued
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SAFETY
Continued
system. The ODS shuts down the re-
place if enough fresh air is not available.
See Air for Combustion and Ventilation,
page 7. If replace keeps shutting off, see
Troubleshooting, page 27.
10. Do not run replace
• where ammable liquids or vapors are
used or stored
• under dusty conditions
11. Do not use this replace to cook food or
burn paper or other objects.
12. Do not use replace if any part has been
exposed to or under water. Immediately
call a qualied service technician to in-
spect the replace and to replace any part
of the control system and any gas control
which has been under water.
13. Do not operate fireplace if any log is
broken. Do not operate replace if a log
is chipped (dime-sized or larger).
14. Turn fireplace off and let cool before
servicing. Only a qualied service person
should service and repair replace.
15. Operating replace above elevations of
4,500 feet could cause pilot outage.
16. To prevent performance problems in
propane/LP units, do not use propane/LP
fuel tanks of less than 100 lbs. capacity
(propane/LP units only).
17. Provide adequate clearances around air
openings.
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 replace shall not be installed in a
bedroom or bathroom.
5. Do not use this replace as a wood-burn-
ing replace. Use only the logs provided
with the replace.
6. Do not add extra logs or ornaments such
as pine cones, vermiculite or rock wool.
Using these added items can cause soot-
ing. Do not add lava rock around base.
Rock and debris could fall into the control
area of replace.
7. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 26.
8. 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.
9. This replace needs fresh air ventilation to
run properly. This replace has an Oxygen
Depletion Sensing (ODS) safety shutoff
LOCAL CODES
Install and use replace 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.
State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Mas-
sachusetts.
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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115254-01B 5
PRODUCT SPECIFICATIONS
32" MODELS
25
1
/
8
"
29
1
/
2
"34
7
/
16
"
36
3
/
8
"
Standoffs
22
1
/
2
"
4"
29
1
/
2
"
16
3
/
4
"
18
7
/
16
"
32
1
/
4
"
36
1
/
2
"
14
15
/
16
"
6
5
/
16
"
3
3
/
8
"
6"
8
15
/
16
"
9
3
/
4
"
12
1
/
4
"
19
1
/
2
"
8
15
/
16
"
2
9
/
16
"
3
7
/
16
"
16
11
/
16
"
2
1
/
4
"
1
9
/
16
"
2
9
/
16
"
8
1
/
8
"
2
13
/
16
"
8
5
/
8
"
8
1
/
8
"
8
1
/
8
"
10
1
/
2
"
4
1
/
4
"
3
1
/
2
"
Built-In
Side
Nailing
Flanges
Square
Gas Line
Access
Holes
Electrical
Access Hole
5/8"
Figure 1 - Firebox Dimensions (32" Models)
Right Side
View
Firebox Top View
Front View
Outside Air
Kit Location
(Optional)
Left Side
View with
Air Kit
PRODUCT FEATURES
OPERATION
This rebox is designed for use with approved
ANSI Z21.11.2 decorative type unvented room
heaters. (Physical size limitations apply. Refer
to minimum rebox requirements supplied
with log heater.) It requires no outside vent-
ing or chimney making installation easy and
inexpensive. When used without the blower,
the rebox requires no electricity making it
ideal for emergency backup heat.
The circulating models will accept a rotary
type fan (model BK) accessory. The blower
circulates heated air from the rebox into the
room. Use of blower is optional.
Your rebox may feature a concrete refrac-
tory brick liner. As with all concrete liners,
this liner may develop slight cracks when
exposed to heat. These cracks will not affect
the performance of the replace or vent-free
gas logs.
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PRODUCT SPECIFICATIONS
Continued
Figure 2 - Firebox Dimensions (36" and 42" Models)
36" AND 42" MODELS
Note: If only one dimension is shown, the dimension is the same for both 36" and 42" models.
Firebox Top View
Front View
Right
Side
View
Outside Air
Kit Location
(Optional)
Left Side
View with
Air Kit
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115254-01B 7
LOCATING FIREbOx
2. Everything needed to complete installation.
3. These models CANNOT be installed in a
bedroom unless the maximum Btu rating of
the installed vent-free log set is less than
10,000 Btu/hr.
4. Proper air for combustion and ventilation
(below).
PLANNING
Plan where you will install the rebox. This will save
time and money later when you install the rebox.
Before installation, consider the following:
1. Where the rebox will be located. Allow for
wall and ceiling clearances (see Installation
Clearances, page 10).
AIR FOR COMbUSTION AND VENTILATION
WARNING: This heater shall
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National Fuel Gas Code, ANSI
Z223.1/NFPA54, the International
Fuel Gas Code,-
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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.
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, reboxes, 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.
PROVIDING ADEQUATE VENTILATION
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 page 7 through 9 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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2
and
and
If your home meets all of the three criteria
above, you must provide additional fresh air.
See Ventilation Air From Outdoors, page 9.
If your home does not meet all of the three
criteria above, proceed to Determining Fresh-
Air Flow for Firebox Location, page 8.
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/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.
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AIR FOR COMbUSTION AND VENTILATION
Continued
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 22 ft. (length) x 18
ft. (width) x 8 ft. (ceiling height) = 3168 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 deter-
mine the maximum Btu/Hr the space can
support.
_____ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 3168 cu. ft. (volume of space) x
20 = 63,360 (maximum Btu/Hr the space
can support)
3. Add the Btu/Hr of all fuel burning appli-
ances in the space.
Vent-free heater ________ 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 appli-
ances. Direct-vent draws combustion
air from the outdoors and vents to the
outdoors.
Example:
Gas water heater ________ Btu/Hr
Vent-free heater +_______ Btu/Hr
Total =_______ Btu/Hr
4. Compare the maximum Btu/Hr the space
can support with the actual amount of
Btu/Hr used.
40,000
39,000
79,000
_______ Btu/Hr (maximum the space
can support)
_______ Btu/Hr (actual amount used)
Example: 63,360 Btu/Hr (maximum
the space can support)
79,000 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 adjoining 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, page 9.
C. Install a lower Btu/Hr heater, if lower Btu/
Hr size makes room unconned.
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support, the
space is an unconned space. You will need
no additional fresh air ventilation.
WARNING: Ifthearea inwhich
-
National Fuel
Gas Code,ANSI Z223.1/NFPA54,
the International Fuel Gas Code,
VENTILATION AIR
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
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115254-01B 9
wall connecting the two spaces (see options
1 and 2, Figure 3). You can also remove door
into adjoining room (see option 3, Figure 3).
Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
AIR FOR COMbUSTION AND VENTILATION
Continued
Figure 4 - Ventilation Air from Outdoors
Figure 3 - Ventilation Air from Inside
Building
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, Section
5.3, 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.
INSTALLATION
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"
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
-
rents move heat to wall surfaces
next to vinyl or cloth wall cover-
-
the air exist, may discolor walls
IMPORTANT: Vent-free gas log heaters add
moisture to the air. Although this is benecial,
installing rebox in rooms without enough
ventilation air may cause mildew to form from
too much moisture. See Air for Combustion
and Ventilation, page 7.
-
WARNING: Never install the
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IMPORTANT: Make sure the rebox is level.
If rebox is not level, log set will not work
properly.
Note: Your rebox is designed to be used in
zero clearance installations. Wall or framing
material can be placed against any exterior
surface on the rear, sides, top or bottom of
your rebox, except where standoff spacers
are integrally attached. If standoff spacers are
attached to your rebox, these spacers can
be placed directly against wall or framing ma-
terials. Use the dimensions shown for rough
opening to create the easiest installation.
Use dimensions shown for rough openings
to create the easiest installation (see Built-In
Firebox Installation, page 11).
INSTALLATION CLEARANCES
WARNING: Maintain the
Carefully follow these instructions. This will
ensure safe installation.
A. Clearances from side of replace cabinet
to any combustible material and wall
should follow diagram in Figure 5.
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 side of
replace cabinet (see Figure 5).
B. Clearances from top of rebox opening to
ceiling should not be less than 42".
C. When rebox is installed on carpeting or
other combustible material, other than
wood ooring, rebox should be installed
on a metal or wood panel extending the
full width and depth of the enclosure.
D. Clearances from bottom of rebox to oor
is 0".
These reboxes can be installed as freestand-
ing units against a wall with the approved,
optional cabinet mantels (see Accessories,
page 41) or as a built-in unit. The clearances
are the same for either installation method.
INSTALLATION
Continued
Figure 5 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
CAUTION: Do not install
Example
Figure 6 - Minimum Mantel Clearances
for Built-In Installation
Supplied
Firebox Hood
Must Be Used
at All Times
Wire-mesh
Screen
Firebox
Noncombustible
Material May
Project Off this
Surface above
the Firebox Hood
Mantel Shelf
Note: Any portion of the
mantel shelf must NOT
extend beyond this profile.
12" 16" 20"
1 1
/
2"
6 3
/
4"
12"
Note: All vertical
measurements are
from top of fireplace
hood opening to
bottom of mantel shelf.
These minimum
clearances replace any
other recommended
clearances supplied
with your ANSI Z21.11.2
approved gas logs.
Wall board or facing
material (above
firebox) may be of
combustible material,
including decorative
mantel ornaments or
other similar projec-
tions off of the facing
material.
Framing
Material
Installation
If placing custom mantel above built-in re-
box, you must meet the minimum allowable
clearance between mantel shelf and top of
rebox opening shown in Figure 6. These are
the minimum allowable mantel clearances
for a safe installation. Use larger clearances
wherever possible to minimize the heating of
objects and materials placed on the mantel.
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115254-01B 11
CAUTION: Do not allow the
minimum clearances shown in
NOTICE: If your installation does
not meet the minimum clear-
ances shown, you must do one
-
Built-in installation of this rebox involves
installing rebox into a framed-in enclosure.
This makes the front of rebox ush with wall.
Optional brass trim accessories are available
(see Accessories, page 41). The brass trim
will extend past sides of rebox approximately
1/2". This will cover the rough edges of the
wall opening. If installing a mantel above the
rebox, you must follow the clearances shown
in Figure 6, page 10. Follow these instructions
to install the rebox in this manner.
1. Frame in rough opening. Firebox framing
should be constructed of 2 x 4 lumber or
heavier. Use dimensions in Table 1 and
rough opening layout in Figure 7a. Adjust
framing so that rebox ushes with n-
ished wall surface. If installing in a corner,
use dimensions in Figures 7b, 7c and 7d
for rough opening.
2. Install gas piping to rebox location (see
Connecting to Gas Supply, page 13).
INSTALLATION
Continued
Model Front Width
(Inside to Inside)
Height Depth
(Min.)
32" 34 7/836 3/416 1/4
36" 41 1/240 1/220 3/4
42" 48 5/844 1/222 5/8
Figure 7 - Rough Opening for Installing
in Wall
Depth
(Minimum)
Width
(Inside to Inside)
Height
Figure 7a
37"
45°
41
1
/
2
"
52
11
/
3
2
"
74"
TOP VIEW
FOR 36"
MODELS
Figure 7c
30"
45°
34
7
/
8
"
4
2
7
/
16
"
60"
TOP VIEW
FOR 32"
MODELS
43"
45°
485/8"
60
13
/
16
"
86"
TOP VIEW
FOR 42"
MODELS
Figure 7d
Figure 7b
IMPORTANT: If installing blower acces-
sory (circulating models with louvers only),
see Hard-Wiring Firebox, page 12.
3. Carefully set rebox in front of rough open-
ing with back of rebox inside wall open-
ing. IMPORTANT: If installing a perimeter
trim kit, see instructions included with
trim accessory. You must install shoulder
screws from trim kit now.
4.
Carefully insert rebox into rough opening.
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5. Attach rebox to wall studs using nails
or wood screws through holes in nailing
ange (see Figure 8).
6. If using an optional perimeter trim kit,
install the trim after nal nishing and/or
painting of wall. See instructions included
with trim accessory for attaching trim.
7. Install and properly test gas log heater.
Follow installation instructions included
with the vent-free gas log heater that is
being installed.
IMPORTANT: When nishing your rebox,
combustible materials such as wall board,
gypsum board, sheet rock, drywall, plywood,
etc. may be butted up next to the sides and top
of the rebox. Combustible materials should
never overlap the rebox front facing.
WARNING: Do not allow any
IMPORTANT: Noncombustible materials such
as brick, tile, etc. may overlap the front facing,
but should never cover any necessary open-
ings like louvered slots.
WARNING: Do not allow
WARNING: Use only non-
-
INSTALLING OPTIONAL
ACCESSORIES
To install a mantel or blower see instructions
provided with accessory.
Figure 8 - Attaching Firebox to Wall Studs
Nailing
Flanges
Nails or Wood
Screws
INSTALLATION
Continued
-
-
low The National Electric Code
ANSI/NFPA 70.
The “Handy Box” with duplex outlet is pro-
vided in the rebox located in the lower right
base area.
1. Remove screw holding duplex outlet cover
to handy box. Remove duplex outlet.
2. Route electrical cable through strain relief
and handy box (see Figure 9).
3. Connect electrical cable to duplex outlet.
Match wire colors to those on duplex out-
let. Be sure to connect the ground wire.
4. Place duplex outlet back into handy box
and secure with screws. Replace outlet
cover.
Strain Relief
Duplex Box/
Handy Box
Figure 9 - Hard-Wiring Firebox
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115254-01B 13
INSTALLATION
Continued
INSTALLING FIREPLACE HOOD
AND SCREEN
1. Attach hood to rebox using screws pro-
vided (see Figure 10).
2. Insert each rod through all rings located
at top of screen.
3. Insert rst rod into rear hole in left side
of rebox. Fasten rod to rear hole near
center of rebox using #10 x 3/8" Phillips
screw provided (see Figure 11).
4. Insert other rod into front hole on right
side of rebox and fasten using remaining
Phillips screw.
Figure 10 - Screw and Hood Placement
(Model May Vary From Illustration)
Figure 11 - Installing Fireplace Screen
(Model May Vary From Illustration)
Screw
Rear Hole
Top View of Rod Layout
Rod
Front
Hole
Ring
Screen
Identication
Label Location
CONNECTING TO GAS SUPPLY
-
CAUTION: Never connect
-
WARNING: Never connect
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
• approved exible gas line with gas con-
nector (if allowed by local codes) (not
provided)
* 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.
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INSTALLATION
Continued
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
12. Pointing the vent down protects it from
freezing rain or sleet.
CAUTION: Use only new,
-
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 13 or 14, 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.
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.
External
Regulator
with Vent
Pointing
Down
Propane/LP
Supply Tank
Figure 12 - External Regulator with Vent
Pointing Down
Tee Cap Pipe
Joint Nipple
Figure 14 - Attaching Flexible Gas Line
to Control Valve (Remote-Ready Models)
* Purchase the optional CSA design-certied
equipment shutoff valve from your dealer.
**Minimum inlet pressure for purpose of input
adjustment
Approved
Flexible
Gas Hose (if
allowed by
local codes)
Pipe Cap Tee
Nipple Joint
3" Minimum
Sediment Trap
- From External
Regulator
(11" W.C.** to 14"
W.C. Pressure)
Natural - From
Gas Meter (5"
W.C.** to 10.5"
W.C. Pressure)
Gas Control
CSA Design-Certied
Equipment Shutoff Valve
with 1/8" NPT Tap*
Figure 13 - Attaching Flexible Gas Line to
Control Valve (Manually-Controlled Models)
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)
3" Minimum
Sediment Trap
Gas
Regulator
We recommend that you install a sediment
trap in supply line as shown in Figures 13
and 14, depending on your model. 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
contaminants. This keeps them from going
into heater controls. If sediment trap is not
installed or is installed wrong, heater may
not run properly.
www.desatech.com
115254-01B 15
and connections, internal and
external to unit, for leaks after
WARNING: Never use an
-
CAUTION: Make sure exter-
-
der Connecting 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 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 sys-
tem. 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 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
propane/LP supply to equipment shutoff
valve for propane/LP (see Figure 16 and
17, page 16). Apply noncorrosive leak
detection uid to all joints. Bubbles form-
ing show a leak.
4. Correct all leaks at once.
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.
INSTALLATION
Continued
Open
Closed
Equipment
Shutoff Valve
Figure 15 - Equipment Shutoff Valve
www.desatech.com 115254-01B16
Propane/LP
Supply Tank
4. Check all joints from equipment shutoff
valve to control valve (Manually-Con-
trolled Models) or to gas control (Remote-
Ready Models) (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 19).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Ap-
pliance, page 20 for Manually-Controlled
Models or page 23 for Remote-Ready
Models).
INSTALLATION
Continued
Equipment
Shutoff Valve
Figure 17 - Checking Gas Joints
(Natural Gas Only)
Figure 16 - Checking Gas Joints
(Propane/LP Gas Only)
Equipment Shutoff Valve
Gas
Meter
Control Valve Location
Control Valve Location
INSTALLING LOGS
(Models
and
-
CAUTION: After installa-
With the heater set to HI, check
-
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 on top of grate and over
front posts on chassis (see Figure 18).
2. Place rear log on rear of chassis (see
Figure 18). Slide log forward so that it sits
against rear posts on chassis.
Front Post
Figure 18 - Installing Vintage Oak Two-
Piece Log Set
Log #2
Chassis
Rear
Post
Log #1
www.desatech.com
115254-01B 17
Figure 19 - Installing Vintage Oak Two-
Piece Log Set (Top View)
Two Piece Log Set
Burner Ports
INSTALLING LOGS
-
It is very important to install these logs exactly
as instructed. Do not modify logs. Only use
logs supplied with heater.
Note: Your appliance may vary from model
shown but log placement will be the same.
1. Place front logs (1L and 1R) on top of
grate. Make sure notches in bottom of logs
t over grate prongs (see Figure 20).
2. Rest bottom of center log (#2) behind
metal posts on front burner (see Figure
21). Make sure grooves in bottom of log
t over grate. Bring log forward against
metal posts.
INSTALLATION
Continued
Figure 20 - Installing Front Logs
Front Logs
Notch
Grate
Prong
IMPORTANT: Make sure logs do not cover
any burner ports (see Figure 19).
3. Place lava rock around base of heater if
desired.
Figure 22 - Installing Rear Log (#3)
Figure 23 - Installing Crossover Log (#4)
3. Slide groove on back of rear log against
rear grate prongs. Make sure peg on the
log is on top (see Figure 22).
4. Place crossover log on rear and middle
logs. Make sure peg on rear log is in the
hole in bottom of crossover log. Crossover
log should t in cutout of middle log (see
Figure 23).
Rear Log (#3)
Rear
Grate
Prong
Crossover
Log (#4)
Peg
Figure 21 - Installing Center Log
Center Log (#2)
Grate
Metal Post
Metal
Post
www.desatech.com 115254-01B18
INSTALLING LOGS
M
-
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.
Note: Your appliance may vary from model
shown but log placement will be the same.
1. Place ember bed in center of the base
assembly as shown in Figure 24.
2. Rest rear log in back corner sections of
base assembly as shown in Figure 24.
Make sure log is completely vertical and
not leaning in toward burner where the
ame will touch the log.
Base
Assembly
Figure 24 - Installing Ember Bed, Rear
and Middle Logs
Ember
Bed
Rear Log
Middle Log
INSTALLATION
Continued
Figure 25 - Installing Top Logs
Figure 26 - Installing Front Logs
Middle
Log
Top Left Log
Top Right Log
Left
Front
Log
Right Front Log
3. Position middle log as shown in Figure
24 making sure grooves in bottom of log
t over grate prongs. This log will rest on
top of bottom log.
4. Place top right log onto pins of middle
log (see Figure 24). Bottom of top log will
rest on middle log as shown in Figures
25 and 26.
5. Place top left log on middle log as shown
in Figure 25.
6. Place right and left front logs against grate
as shown in Figure 26 to hide controls.
www.desatech.com
115254-01B 19
OPERATION
MANUALLY-CONTROLLED MODELS
FOR YOUR SAFETY
WARNING: If you do not fol-
low these instructions exactly,
-
WHAT TO DO IF YOU SMELL GAS
-
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 High 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 in column 1. If
you don’t smell gas, go to the next step.
www.desatech.com 115254-01B20
5. Press in control knob and turn counter-
clockwise to the PILOT position.
Keep control knob pressed in for ve (5)
seconds (see Figure 27).
Note: You may be running this heater for
the rst time after hooking up to gas sup-
ply. 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 front 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.
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. Push in and turn control knob counter-
clockwise to the HI position. Both
burners should light. Set control knob to
desired setting.
LO
HI
OFF
PILOT
Thermocouple
Ignitor Electrode
Pilot Burner
Figure 27 - Control Knob and Ignitor
Button Location
Figure 28 - Pilots
OPERATION
Continued
MANUALLY-CONTROLLED MODELS
Ignitor
Button
Control Knob
Thermocouple
Ignitor
Electrode
Pilot Burner
9.
To leave pilot lit and shut off burners only,
turn control knob clockwise to the PI-
LOT position. Press in and turn control knob
clockwise to the PILOT position.
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 ames and glowing embers from two
burners. Selecting higher settings produces
greater heat output. This results in increased
heating comfort.
CAUTION: Do not try to ad-
TO TURN OFF GAS
TO APPLIANCE
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
15, page 15).
MANUAL LIGHTING
PROCEDURE
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, column 1.
This manual suits for next models
31
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