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 Specications......................................... 5
Locating Firebox.................................................. 7
Air For Combustion and Ventilation..................... 7
Installation ........................................................... 9
Operation........................................................... 19
Inspecting Burners............................................. 25
Cleaning and Maintenance................................ 26
Troubleshooting................................................. 27
Specications .................................................... 31
Wiring Diagram.................................................. 31
Parts .................................................................. 32
Replacement Parts............................................ 40
Service Hints ..................................................... 40
Technical Service............................................... 40
Accessories ....................................................... 41
Warranty ..............................................Back Cover

www.desatech.com
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 inuence 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

   -
   
   



    
     -
     

    
-
-

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

www.desatech.com 115254-01B4
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 qualied 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 qualied 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.

www.desatech.com
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.

www.desatech.com 115254-01B6
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

www.desatech.com
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

-


National Fuel Gas Code, ANSI
Z223.1/NFPA54, the International
Fuel Gas Code,-
-



Today’s homes are built more energy efcient
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
efcient, 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 classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned 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:
 -
    

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 denes a conned 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 unconned 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 unconned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.

www.desatech.com 115254-01B8
AIR FOR COMbUSTION AND VENTILATION
Continued
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION


Use this work sheet to determine if you have
a conned or unconned 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 conned
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 unconned 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 unconned.
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support, the
space is an unconned 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
unconned space. When ventilating to an
adjoining unconned space, you must provide
two permanent openings: one within 12" of the
ceiling and one within 12" of the oor on the

www.desatech.com
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 benecial,
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

 
 
   
   



 
 



www.desatech.com 115254-01B10
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.