Desa FLAME-MAX VML27NR Specification sheet

For more information, visit www.desatech.com
WARNING: If the information in this manual is not fol-


         


— WHAT TO DO IF YOU SMELL GAS
 
• Do not touch any electrical switch; do not use any

 

 

 -




O
F
F
L
O
FLAME-MAX®MULTI-SIDED LOG DESIGN
VML27NR AND VML27PR
REMOTE CONTROL READY MODEL
UNVENTED (VENT-FREE) GAS LOG HEATER
OWNER’S OPERATION AND INSTALLATION MANUAL


www.desatech.com 111115-01F2
SAFETY INFORMATION
TABLE OF CONTENTS
Safety Information ............................................... 2
Product Identication........................................... 5
Local Codes......................................................... 5
Unpacking............................................................ 5
Product Features................................................. 5
Remote Control Accessories ............................... 5
Air For Combustion and Ventilation ..................... 6
Installation ........................................................... 8
Operating Heater............................................... 19
Inspecting Burners ............................................ 22
Cleaning and Maintenance................................ 23
Wiring Diagram.................................................. 24
Specications .................................................... 24
Replacement Parts............................................ 24
Service Hints ..................................................... 24
Technical Service............................................... 24
Troubleshooting................................................. 25
Accessories ....................................................... 29
Illustrated Parts Breakdown and Parts List........ 30
Warranty Information ...........................Back Cover
  -
-
teration, service or main-
tenance can cause in-

Refer to this manual for
correct installation and
 
For assistance or addi-
tional information con-
   



is for installation only in a
-
   
-

  
installationsinaccordance
-
tion: Do not install this

  
 



WARNING: This is an
  -
    
from the room in which


and ventilation air must
Air
for Combustion and Ven-
tilation

-
stalled in an aftermarket,*
 
 
-


     
   
   
   




www.desatech.com
111115-01F 3
-

known to the State of California




    -
    
    
    
    -




 Early signs of carbon
monoxide poisoning resemble the u, with head-
aches, dizziness or nausea. If you have these signs,
the heater may not be working properly. Get fresh
air at once! Have heater serviced. Some people
are more affected by carbon monoxide than others.
These include pregnant women, people with heart
or lung disease or anemia, those under the inuence
of alcohol and those at high altitudes.
    Natural and pro-
pane/LP gases are odorless. An odor-making
agent is added to these gases. 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 warn-
ings. 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
   
-

SAFETY INFORMATION
Continued WARNING: Do not allow fans



    
   

    



   
    






   
will remain hot for a time after


-
dren when they are in the room
    
hand-held remote accessory,

   
    

    

    

    
-
-


www.desatech.com 111115-01F4
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) in-
side 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 bedroom or
bathroom, unless installed as a vented appliance.
See Installing Damper Clamp Accessory for
Vented Operation, page 12.
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 qualied chimney cleaner. Creosote will
ignite if highly heated. Inspect chimney ue
for damage. If damaged, repair ue 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. This log heater is designed to be smokeless. If
logs ever appear to smoke, turn off heater and
call a qualied service person. Note: During
initial operation, slight smoking could occur
due to log curing and heater burning manu-
facturing residues.
9. To prevent the creation of soot, follow the
instructions in Cleaning and Maintenance,
page 23.
10. 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.
SAFETY INFORMATION
Continued
11. This heater needs fresh, outside air ventilation to
run properly. This heater has an oxygen depletion
sensing (ODS) pilot light safety system. The
ODS shuts down the heater if not enough fresh
air is available. See Air for Combustion and
Ventilation, page 6. If heater keeps shutting off,
see Troubleshooting, page 25.
12. Do not run heater
• where ammable liquids or vapors are
used or stored
• under dusty conditions
13. Do not use this heater to cook food or burn
paper or other objects.
14. Do not use heater if any part has been exposed
to or under water. Immediately call a qualied
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.
15. Do not operate heater if any log is broken. Do
not operate heater if a log is chipped (dime-
sized or larger).
16. Turn heater off and let cool before servicing
or repairing. If using optional remote control
accessories, make sure the selector switch is in
the OFF position. Only a qualied service per-
son should install, service or repair heater.
17. If using optional remote control accessories,
make sure the selector switch is in the OFF
position when you are away from home for
long periods of time.
18. This heater must not be connected to any
external electrical source.
19. To prevent performance problems, do not
use propane/LP fuel tank of less than 100 lb.
capacity (propane/LP units only).
20. Operating heater above elevations of 4,500
feet could cause pilot outage.
21. Provide adequate clearances around air openings.
State of Massachusetts: The installa-
tion must be made by a licensed plumber
or gas fitter in the Commonwealth of
Massachusetts.
Sellers of unvented propane or natural
gas-red supplemental room heaters shall
provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for
bedroom and bathroom installation in the
Commonwealth of Massachusetts.

www.desatech.com
111115-01F 5
PRODUCT
IDENTIFICATION
Figure 1 - Product Identication
O
F
F
P
I
L
O
T
O
N
H
I
L
O
O
F
F
P
I
L
O
T
O
N
H
I
L
O
Control Knob
Log Set
Base
Assembly
Optional
Hand-Held
Remote
Control
Flame Adjustment Knob
Control Cover Log
Piezo
Ignitor
LOCAL CODES
Install and use heater with care. Follow all local
codes. In the absence of local codes, use the lat-
est 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 remove the
     -

   

1. Remove logs and heater base assembly from
carton. Note: Do not pick up heater base assem-
bly by the burner. This could damage heater.
Always handle base assembly by grate.
2. Remove all protective packaging applied to
logs and heater for shipment.
3. Check all items for any shipping damage. If
damaged, promptly inform dealer where you
bought heater.
PRODUCT FEATURES
OpERATION
This heater is clean burning. It requires no outside
venting. There is no heat loss out a vent or up a
chimney. Heat is generated by realistic, dancing
yellow ames. This heater is designed for vent-free
operation with ue damper closed. It has been
tested and approved to ANSI Z21.11.2 standard
for unvented heaters. State and local codes in some
areas prohibit the use of vent-free heaters. This
heater may also be operated as a vented decorative
product (ANSI Z21.60) by opening ue damper
(non-thermostat operation only).
AppLICATION
These multisided logs are designed to be equally
beautiful when viewed from any angle. They
are designed specically for use in see-through,
peninsula and island fireboxes with multiple
openings. You may also install this log heater in
a standard rebox.
SAFETY pILOT
This heater has a pilot with an Oxygen Deple-
tion Sensing (ODS) safety shutoff system. The
ODS/pilot is a required feature for vent-free room
heaters. The ODS/pilot shuts off the heater if there
is not enough fresh air.
pIEzO IGNITION SYSTEM
This heater has a piezo ignitor. This system re-
quires no matches, batteries or other sources to
light heater.
REMOTE CONTROL
ACCESSORIES
There are four optional remote controls that can be
purchased separately for this log heater:
• wall switch
• wall thermostat
• hand-held ON/OFF remote
• hand-held thermostat remote
See Accessories, page 29.
Note: The wall thermostat or hand-held thermostat
may not be used where vented decorative listing
is required.

www.desatech.com 111115-01F6

construction where:
 -
    
      
-112

and
 
and
      
     


    


If your home meets all of the three criteria

See Ventilation Air From Outdoors
If your home does not meet all of the three
    Determining
Fresh-Air Flow For Heater Location

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
per hour (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 per hour
(4.8 m3 per kw) of the aggregate input rating of
all appliances installed in that space. Rooms com-
municating 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.
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 pas-
sageways 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)
AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
     
    -

-


     
  

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 appliances need fresh
air for proper combustion and ventilation.
Exhaust fans, replaces, clothes dryers and fuel
burning appliances draw air from the house to
operate. You must provide adequate fresh air for
these appliances. This will insure proper venting
of vented fuel-burning appliances.


The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Section 5.3,
Air for Combustion and Ventilation.
All spaces in homes fall into one of the three fol-
lowing ventilation classications:
1. Unusually Tight Construction
2. Unconned Space
3. Conned Space
The information on pages 4 through 6 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 unusually
tight construction, you must provide additional
fresh air.

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111115-01F 7
Example: Space size 20 ft. (length) x 16 ft.
(width) x 8 ft. (ceiling height) = 2,560 cu. ft.
(volume of space)
If additional ventilation to adjoining room is
supplied with grills or openings, add the volume
of these rooms to the total volume of the space.
2. Multiply the space volume by 20 to determine
the maximum Btu/Hr the space can support.
__________ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 2,560 cu. ft. (volume of space) x 20 =
51,200 (maximum Btu/Hr the space can support)
3. Add the Btu/Hr of all fuel burning appliances in
the space.
Vent-free replace __________ Btu/Hr
Gas water heater* __________ Btu/Hr
Gas furnace __________ Btu/Hr
Vented gas heater __________ Btu/Hr
Gas replace logs __________ Btu/Hr
Other gas appliances* + __________ Btu/Hr
Total =__________ Btu/Hr
* Do not include direct-vent gas appliances. Di-
rect-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 example is a conned space because
the actual Btu/Hr used is more than the maximum
Btu/Hr the space can support. You must provide ad-
ditional fresh air. Your options are as follows:
A. Rework worksheet, adding the space of an adjoin-
ing 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 Ventila-
tion Air From Outdoors.
C. Install a lower Btu/Hr replace, if lower Btu/Hr
size makes room unconned.
AIR FOR COMBUSTION
AND VENTILATION
Continued
40,000
33,000
73,000
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: If the area in
-


    



in the National Fuel Gas Code,
ANSI Z223.1/NFPA54 Section 5.3



This fresh air would come from an adjoining un-
con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 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, Section 5.3, 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
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills Into
Adjoining
Room,
Option 1
12"
12"

www.desatech.com 111115-01F8
INSTALLATION
NOTICE: This heater is intended
    


     -








 -


NOTICE:Stateorlocalcodesmay
-
    




cleaned of soot, creosote, ashes
-
    



-


WARNING: Seal any fresh
air vents or ash clean-out doors
-

     
   

WARNING: Never install the
heater
 -
-

• in a recreational vehicle
• where curtains, furniture, cloth-

are less than 42" from the front,

 
• in windy or drafty areas
Figure 3 - Ventilation Air from Outdoors

Provide extra fresh air by using ventilation grills or
ducts. You must provide two permanent 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 thermostat-
controlled power vent. Heated air entering the attic
will activate the power vent.
AIR FOR COMBUSTION
AND VENTILATION
Continued
Outlet
Air
Ventilated
Attic
Outlet
A
ir
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic

www.desatech.com
111115-01F 9
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 benecial, installing heater
in rooms without enough ventilation air may cause
mildew to form from too much moisture. See Air
for Combustion and Ventilation, page 6.
CHECK GAS TYpE
Use the correct gas type (natural or propane/LP)
for your unit. If your gas supply is not correct, do
not install heater. Call dealer where you bought
heater for proper type heater.
   
-
   

INSTALLATION AND CLEARANCES

WARNING: Maintain the



INSTALLATION
Continued

 
    
27" 17" 19" 32"
MINIMUM FIREpLACE CLEARANCE TO

  
27" 16" 42"
Carefully follow the instructions below. This will
ensure safe installation into a masonry, UL127-
listed manufactured replace or listed vent-free
rebox.
Minimum Clearances For Side


A. Clearances from the side of the fireplace
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 combus-
tible material must be 4" from the side of the
replace cabinet (see Figure 4).
Note: When installing your gas logs into
a manufactured firebox, follow firebox
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".
Figure 4 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
Example
NOTICE: Manual control heaters

If so, you must always run heater

    


Installing Damper
Clamp Accessory for Vented
Operation

www.desatech.com 111115-01F10
INSTALLATION
Continued

Clearances

Note: If using a mantel, proceed to If Using
Mantel. If not using a mantel, follow the informa-
tion below.
You must have noncombustible material(s) above
both replace openings. Noncombustible materials
(such as slate, marble, tile, etc.) must be at least
1/2" thick. With sheet metal, you must have non-
combustible 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. See
Figure 5 at right for minimum clearances.
IMPORTANT: If you cannot meet these minimum
clearances, you must operate heater with chimney
ue damper open. Go to Installing Damper Clamp
Accessory for Vented Operation, page 12.

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 non-
combustible 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. Even if
noncombustible material is more than 12", you
may need the hood accessory to deect heat away
from your mantel shelf. See Figure 5 and 6 and
Figure 7, page 9, for minimum clearances.
IMPORTANT: If you cannot meet these minimum
clearances, you must operate heater with chimney
ue damper open. Go to Installing Damper Clamp
Accessory for Vented Operation, page 12.
Figure 5 - Heat Resistant Material (Slate,
Marble, Tile, etc.) Above Fireplace

 
 
12" or more Noncombustible
material OK.
Between 8" Install replace hood
and 12" accessory (GA6050,
GA6052 or GA6053, see
Accessories, page 29).
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.
MANTEL CLEARANCES
In addition to meeting noncombustible material
clearances, you must also meet required clearances
between replace openings and mantel shelf on
each side of the replace. 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, page 11).


If minimum clearances in Figure 6, page 11 are not
met, you must have a hood. When using a hood
there are still certain minimum mantel clearances
required. Follow minimum clearances shown in
Figure 7, page 11 when using hood.