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110749-01E

9

These fireboxes can be installed as freestand

-

ing units against a wall with approved cabinet 

mantels that may be available from your retailer 
or supplier, or as a built-in unit. The clearances 
are the same for either installation method.

  cAutIoN:  do  not  install 

the  firebox  directly  on  carpet 

or vinyl.

mantel clearances for built-In 
Installation

If placing custom mantel above built-in fire

-

box, you must meet the minimum allowable 
clearance  between  mantel  shelf  and  top  of 
firebox opening shown in Figure 5. 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 

vent-free gas log heater to touch 

or extend beyond the fireplace 

screen.

notiCe: surface temperatures 

of  adjacent  walls  and  mantels 

become  hot  during  operation. 

walls  and  mantels  above  the 

firebox  may  become  hot  to 

the touch. if installed properly, 

these  temperatures  meet  the 

requirement  of  the  national 

product  standard.  follow  all 

minimum clearances shown in 

this manual.

NotIce: If your installation does 

not  meet  the  minimum  clear-

ances shown, you must do one 

of the following:

•  raise mantel to an acceptable 

height

•  remove mantel

buIlt-IN FIRebox INstAllAtIoN

Built-in  installation  of  this  firebox  involves 
installing firebox into a framed-in enclosure. 

installation

Continued

This makes front of firebox flush with wall. If 
installing a mantel above firebox, you must fol

-

low clearances shown in Figure 5. Follow these 
instructions to install firebox in this manner.

1.  Frame in rough opening. Firebox framing 

should be constructed of 2 x 4 lumber or 

heavier. Use dimensions and rough open

-

ing  layout  in  Figure  6a. Adjust  framing 

so  that  firebox  flushes  with  finished  wall 

surface. If installing in a corner, use dimen-
sions in Figures 6b for rough opening.

Figure 5 - 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

/

2

"

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

 

Figure 6 - Rough Opening for Installing 

in Wall

30"

59 

1

/

2

"

(Inside to Inside)

55" 

Figure 6b

Figure 6a

Summary of Contents for V50S

Page 1: ...s fired unvented decorative room heater Not to exceed 40 000 Btu Hr Do not build a wood fire Carefully review the instructions supplied with the decorative type unvented room heater for the minimum fi...

Page 2: ...operty damage Refer to this manual for correct in stallation and operational procedures For assistance or additional information consult a qualified installer service agency or the gas supplier WARNIN...

Page 3: ...sed or stored under dusty conditions 6 Do not use this firebox to cook food or burn paper or other objects 7 Turn unit off and let cool before servicing Only a qualified service person should service...

Page 4: ...ner Your firebox features 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 f...

Page 5: ...rectly with the space in which the appliances are installed through openings not furnished with doors are considered a part of the unconfined space Adjoining rooms are communicating only if there are...

Page 6: ...tion air from the outdoors and vents to the outdoors Example Gas water heater __________ Btu Hr Vent free fireplace _________ Btu Hr Total _________ Btu Hr 4 Compare the maximum Btu Hr the space can s...

Page 7: ...ills or ducts You must provide two perma nent openings one within 12 of the ceiling and one within 12 of the floor Connect these items directly to the outdoors or spaces open to the outdoors These spa...

Page 8: ...flooring firebox should be installed on a metal or wood panel extending the full width and depth of enclosure D Clearances from the bottom of firebox to the floor is 0 Installation Figure 4 Minimum C...

Page 9: ...emove mantel Built In Firebox Installation Built in installation of this firebox involves installing firebox into a framed in enclosure Installation Continued This makes front of firebox flush with wa...

Page 10: ...ke louvered slots Installation Continued Figure 7 Attaching Firebox to Wall Studs Nailing Flanges Nails or Wood Screws Figure 8 Installing Cabinet Mantel Mantel May Vary From Illustration Cabinet Mant...

Page 11: ...s Line and Equipment Shutoff Valve Model May Vary From Illustration Knockout Locations Knock Out One Hole Gas Line Hole Locate recessed knockout in one of the fire brick sidewall liners see Figures 10...

Page 12: ...FIREPLACE HOOD AND SCREEN 1 Attach hood to firebox using screws pro vided see Figure 12 2 Insert each rod through all rings located at top of screen 3 Insert first rod into rear hole in left side of...

Page 13: ...alling DESA Heating LLC have ready model and serial numbers of your heater the replacement part number You may have further questions about installa tion operation or troubleshooting If so con tact DE...

Page 14: ...www desatech com 110749 01E 14 Parts Models V50H V50S and VFB50NC 1 1 1 2 3 4 5 7 28 9 10 6 11 12 13 29 31 8 16 17 18 19 33 34 19 26 25 25 23 38 32 36 37 35 20 21 22 14 24 30 6...

Page 15: ...111428 02 Bottom Rear Refractory Red 1 111512 02 Bottom Rear Refractory H Bone 1 22 111423 01 Right Refractory 1 111423 02 Right Refractory Red 1 111507 02 Right Refractory H Bone 1 23 111424 01 Left...

Page 16: ...proved by DESA Heating LLC Warranty parts must be obtained through authorized dealers of this prod uct and or DESA Heating LLC who will provide original factory replacement parts Failure to use origin...

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