Desa V32S Quick start guide

For more information, visit www.desatech.com
WARNING: If the information in this manual is not


FOR USE ONLY WITH A LISTED GAS-FIRED UNVENTED
DECORATIVE ROOM HEATER NOT TO EXCEED 40,000

      


DO NOT INSTALL AN APPLIANCE IN THIS FIREBOX
UNLESS THIS FIREBOX MEETS THE MINIMUM DIMEN-

       

      

UNVENTED (VENT-FREE) UNIVERSAL FIREBOX
OWNER’S OPERATION AND INSTALLATION MANUAL
NON-CIRCULATINg MODELS
V32S, VFB32NC, V36S, V36SH, VFB36NC1, V42S, V42SH AND VFB42NC1
CIRCULATINg MODELS
V32, V36, V42, CUVF36C, VFB32C, VFB36C1, VFB42C1, V36H AND V42H
OUTSIDE AIR MODELS
V32A, V32AS, VFB32AC, VFB32ANC, V36A, V36AS, V36ASH,
V36AH, VFB36AC, VFB36ANC, V42A, V42AS, V42ASH, V42AH,
VFB42AC, VFB42ANC

www.desatech.com 108662-01K2
SAFETy
   
  
chemicals known to the state
of California to cause cancer or
-

  
 
alteration, service or
maintenance can cause
   -

for correct installation
  -
   
additional information
   -


-
stalled in an aftermarket,*
 
 
-



IMPORTANT: Read this owner’s

   
    
    
    
    -


    


WARNING: Do not allow fans



    
   

-



  
    

     

TABLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 3
Product Features................................................. 4
Locating Firebox.................................................. 4
Product Specications......................................... 5
Air For Combustion and Ventilation ..................... 7
Installation ........................................................... 9
Replacement Parts............................................ 18
Technical Service............................................... 18
Accessories ....................................................... 18
Parts .................................................................. 20
Warranty ..............................................Back Cover

www.desatech.com
108662-01K 3

    


   
will remain hot for a time after


-
dren when they are in the room


   
    
    
     
   





   

SAFETy
Continued
1. Do not use this rebox as a wood-burning
replace. Use only decorative unvented
room heaters (log sets).
2. Do not add extra logs or ornaments such
as pine cones, vermiculite or rock wool.
Using these added items can cause
sooting.
3. Do not use blower accessory with model
VFB32NC Series. Use only the provided
hood or appropriate hood accessory. See
Accessories on page 18.
4. Vent-free gas log heaters installed in these
reboxes require fresh air ventilation to
run properly. See Air for Combustion and
Ventilation, page 7.
5. Do not run rebox
• where ammable liquids or vapors are
used or stored
• under dusty conditions
6. Do not use this rebox to cook food or
burn paper or other objects.
7. Turn rebox off and let cool before servic-
ing. Only a qualied service person should
service and repair rebox.
8. Operating rebox above elevations of
4,500 feet could cause pilot outage.
9. Do not use the rebox if it has been un-
der water due to the shock hazard that
could result with the blower accessary (if
installed) in place.
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*. Firebox must
be electrically grounded in accordance with
the National Electrical Code, ANSI/NFPA70
(latest edition).
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
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 108662-01K4
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.
BLOWER ACCESSORY
The circulating models will accept either a ro-
tary type fan (model BK) or the triple radial fan
blower system (model BK3) accessories. The
blower circulates heated air from the rebox
into the room. Use of blower is optional.
REFRACTORY BRICK LINER
Your rebox may feature a concrete refractory
brick liner. As with all concrete liners, this liner
may develop slight cracks when exposed to
heat. These cracks will not affect the perfor-
mance of the replace or vent-free gas logs.
OUTSIDE AIR KIT ACCESSORY
Fireboxes that include “A” in their model
number can accept any AK4 series outside
air kit accessory.
The optional AK4 air kit provides additional
outdoor air to improve burner efciency and
reduce build-up of condensation in the living
space. Follow the instructions included with
the air kit.
LOCATINg FIREBOX
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 Installa-
tion Clearances, page 10).
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
(page 7).

www.desatech.com
108662-01K 5
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"
PRODUCT SPECIFICATIONS
Figure 1 - Firebox Dimensions (32" Models)
Right Side View
Firebox Top View
Front View
32" MODELS
Outside Air
Kit Location
(Optional)
Left Side View
with Air Kit

www.desatech.com 108662-01K6
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" mod-
els.
Firebox Top View
Front View
Right Side
View
Outside Air
Kit Location
(Optional)
Left Side
View with
Air Kit

www.desatech.com
108662-01K 7
AIR FOR COMBUSTION AND 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:
 -
    
      
-112

and
 
and
      
     


    


If your home meets all of the three criteria

  Ventilation Air From Outdoors,

If your home does not meet all of the three
    Determining
Fresh-Air Flow for Firebox 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 ag-
gregate 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 communicating
directly with the space in which the appliances
are installed*, through openings not furnished
with doors, are considered a part of the un-
conned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
WARNING: This heater shall
      
-
    
  -
National Fuel Gas
Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code, or


     
  

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 appli-
ances.
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.

www.desatech.com 108662-01K8
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
AIR FOR COMBUSTION AND VENTILATION
Continued
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: 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, page 9.
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:Iftheareain which


-


   National Fuel
Gas Code,ANSI Z223.1/NFPA 54,
the International Fuel Gas Code,

40,000
39,000
79,000

www.desatech.com
108662-01K 9
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
wall connecting the two spaces (see options
1 and 2, Figure 4). 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.
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 4 - Ventilation Air from Outdoors
Figure 3 - Ventilation Air from Inside
Building
Ventilation Air From Outdoors
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.
INSTALLATION
Or
Remove
Door into
Adjoining
Room,
Option
3
V e ntilation Grills
Into Adjoining Room,
Option 2
V e ntilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
Outlet
Air
V e ntilated
Attic
Outlet
Air
Inlet
Air
Inlet Air V e ntilated
Crawl Space
T o
Crawl
Space
T o Attic
 -


WARNING: Never install the

 
 
 -

arelessthan42"fromthefront,

 
 

rated at 10,000 Btu/Hr or less


   
    
    -
rents move heat to wall surfaces

next to vinyl or cloth wall cover-

    
-
 
     
the air exist, may discolor walls


www.desatech.com 108662-01K10
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.
IMPORTANT: Make sure firebox 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 the side of fireplace
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 the side
of the replace cabinet (see Figure 5).
B. Clearances from the 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 enclosure.
D. Clearances from bottom of rebox to the
oor is 0".
These reboxes can be installed as freestand-
ing units against a wall with the approved,
INSTALLATION
Continued
Figure 5 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
optional cabinet mantels (see Accessories,
page 18) or as a built-in unit. Clearances are the
same for either installation method.
CAUTION: Do not install
    

Example
Mantel Clearances for Built-In Installation
If placing custom mantel above built-in rebox,
you must meet the minimum allowable clear-
ance between mantel shelf and top of rebox
opening shown in Figure 6, page 11. 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.
CAUTION: Do not allow the




    
   
    
    

   
   
   
minimum clearances shown in
