Desa VJM50, VJM42, VJM36 User Manual

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RESIDENTIAL AND OUTDOOR WOODBURNING FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
(V)JM36, (V)JM42 AND (V)JM50
WOOD BURNING MASONRY FIREPLACES WITH INSULATION
SAVE THIS BOOK This book is valuable. In addition to instructing you on how to install and maintain your appliance, it also contains information that will enable you to obtain re­placement parts or accessory items when needed. Keep it with your other important papers.
This fireplace is approved for use as a wood burning fireplace or for use with a vented gas log approved to ANS Z21.60, Z21.84 or RGA 2-72 standards or for use with a vent-free gas log heater approved to ANS Z21.11.2 standard.
This wood burning fireplace complies with UL127­CAN/ULS-S610-M87 standard as a FACTORY BUILT APPLIANCE.
Save this manual for future reference.
For more information, visit www.desatech.com
WARNING: Improper installation, adjustment, altera­tion, service or maintenance can cause injury, property damage or loss of life. Refer to this manual for assis tance or additional information. Consult a qualified installer or local distributor.
TABLE OF CONTENTS
Safety Information ............................................... 2
Specifications ......................................................
Fireplace Installation ........................................... 6
Venting Installation ..............................................
Optional Gas Line Installation ........................... 12
Brick Installation ................................................ 13
5
Glass Door Installation ...................................... 20
Operation and Maintenance Guidelines ............ 21
Technical Service ..............................................
8
Replacement and Accessory Parts ................... 23
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22

SAFETY INFORMATION

IMPORTANT: Check local codes before installing this fireplace.
Before beginning the installation of the fireplace, read these instructions through completely.
• This DESA fireplace and its components are safe when installed according to this installation manual. Unless you use DESA components, which have been designed and tested for the fireplace system, you may cause a fire hazard.
• The DESA warranty will be voided by and DESA disclaims any responsibility for the following actions.
a. Modification of the fireplace, components,
doors, air inlet system and damper control.
b. Use of any component part not manufac
tured or approved by DESA in combination
with a DESA fireplace system. Proper installation is the most important step in ensuring safe and continuous operation of the fireplace. Consult the local building codes as to the particular requirements concerned with the installation of all factory built fireplaces.
WARNING: Do not install a fireplace insert in this box unless the manufacturer's instructions with the insert specifically state this fireplace has been tested for use with this insert.
FOR YOUR SAFETY
• Do not store or use gasoline or any other flammable vapors or liquids in the vicinity of this or any other appliance.
• Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.
• Do not place clothing or other flammable materials on or near the appliance.
• Never leave children unat tended when a fire is burning in the fireplace.
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WARNING: Use solid wood or processed solid fuel firelogs only. When processed wood fuel fire logs are used, do not poke or stir the logs while they are burn­ing. Use only fire logs that have been evaluated for the application in fireplace and refer to fire log warnings and caution markings on packaging prior to use.
This fireplace is not intended to be used as a substitute for a furnace to heat an entire home. Use for supplemental heat only.
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117541-01A
SPECIFICATIONS Continued
10.50
15.375
0.625
45.000
29.0
0
26.625
22.000
36.000
21.500
3.50
10.7
5
1.000
49.000
8.000
58.000
30.000
36.000
45.000
12.000
9.50
7.0
67.000
7.50
0
11/2" AIR SPACE
BACK AND SIDES
0" TO
BOTTOM
GAS LINE
KNOCKOUTS
12" EACH SIDE
COMBUSTIBL
E
WA
LL BOARD
NO COMBUSTIBL
E
MATERIAL ON FA
CE
MINIMUM 12" TO PERPENDICULA
R
SIDEWA
LL
HEARTH EXTENSION 60" X 20"
1" CHIMNEY AIRSPACE CLEARANCE TO COMBUSTIBLE MATERIAL
TERMINATIO
N
SQUARE CHASE-TOP
ROUND TOP TERMINATION
OUTSIDE AIR
20.000
GAS LINE KNOCK OUTS
AIR KI
T
KNOCK OUT
LEFT SIDE
MODELS VJM36 AND JM36
117541-01A 3
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SPECIFICATIONS Continued
10.50
17.0
0
0.625
51.000
30.500
28.500
21.250
41.250
23.500
24.250
3.50
13.0
0
1.000
49.000
8.000
58.000
30.000
42.000
51.000
12.000
9.50
8.50
67.000
11.000
GAS LINE
KNOCK OUTS
AIR KI
T
KNOCK OUT
LEFT SIDE
OUTSIDE AIR
11/2" AIR SPACE
BACK AND SIDES
0" TO
BOTTOM
GAS LINE
KNOCKOUTS
12" EACH SIDE
COMBUSTIBLE WALL BOARD
NO COMBUSTIBL
E
MATERIAL ON FA
CE
MINIMUM 18" TO PERPENDICULA
R
SIDEWA
LL
HEARTH EXTENSION 66" X 20"
2" CHIMNEY AIRSPACE CLEARANCE TO COMBUSTIBLE MA
TERIAL
ROUND TOP TERMINATION
TERMINATIO
N
SQUARE CHASE-TOP
MODELS VJM42 AND JM42
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117541-01A
MODELS VJM50 AND JM50
10.50
17.0
0
50.000
23.500
32.750
3.50
13.0
0
9.50
8.50
2" CHIMNEY AIRSPACE CLEARANCE TO COMBUSTIBLE MA
TERIAL
TERMINATIO
N
SQUARE CHASE-TOP
ROUND TOP TERMINATION
COMBUSTIBLE WA
LL BOARD
NO COMBUSTIBL
E
MATERIAL ON FA
CE
0" TO
BOTTOM
OUTSIDE AIR
11/2" AIR SPACE
BACK AND SIDES
GAS LINE
KNOCKOUTS
12" EACH SIDE
MINIMUM 18" TO PERPENDICULA
R
SIDEWALL
HEARTH EXTENSION 74" X 20"
0.625
59.000
38.500
28.500
21.250
11.000
1.000
49.000
8.000
58.000
30.000
50.000
59.000
12.000
67.000
LEFT SIDE
GAS LINE
KNOCK OUTS
AIR KIT
KNOCK OUT

SPECIFICATIONS

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117541-01A 5

FIREPLACE INSTALLATION

30.125
59.250 (50")
58.125
67.125
51.250 (42")
45.250 (36")
28.250 (36")
71.000 (50")
100.000 (50")
65.000 (42")
92.000 (42")
86.500 (36")
61.000 (36")
MAINTAIN 1 1/2" CLEARANCE AT SIDES AND BACK OF FIREPLACE
1 1/2" CLEARANCE NOT REQUIRED AT NAILING FLANGES
SELECTING LOCATION
To determine the safest and most efficient location for the fireplace, you must take into consideration the following guidelines:
1. The location must allow for proper clearances (see Figures 1 and 2).
2. Consider a location where the fireplace will not be affected by drafts, air conditioning ducts, windows or doors.
3. A location that avoids the cutting of joists or roof rafters will make installation easier.
4. An outside air kit is available with this fireplace (see Optional Outside Air Kit on page 8).
MINIMUM CLEARANCE TO COMBUSTIBLES
Back and sides of fireplace 1 1/2" minimum*
Front of fireplace 48" minimum
Floor** 0" minimum
Perpendicular wall to opening 18" minimum 12" min. JM36
Top spacers 0" minimum
Mantel clearances
Chimney outer pipe surface 2" minimum 1" min. JM36
* Not required at nailing flanges ** See step 2 of Framing
see Mantels, page 7
FRAMING
1. Frame the opening for the fireplace using the dimensions shown in Figures 1 and 2.
2. If the fireplace is to be installed directly on carpeting, tile (other than ceramic) or any combustible material other than wood floor ing, the fireplace must be installed upon a metal or wood panel extending the full width and depth of the fireplace.
3. Set the fireplace directly in front of this open ing and slide the unit back until the nailing flanges touch the side framing.
4. Check the level of the fireplace and shim with sheet metal if necessary.
5. Before securing fireplace to prepared framing, the ember protector (provided) must be placed between the hearth extension (not supplied) and under the bottom front edge of the fire place to protect against glowing embers falling through. If the fireplace is to be installed on a raised platform, a Z-type ember protector (not supplied) must be fabricated to fit your required platform height. The ember protector should extend under the fireplace a minimum of 1 1/2". The ember protector should be made of galvanized sheet metal (28 gauge minimum to prevent corrosion.
6. Using screws or nails, secure the fireplace to the framing through flanges located on the sides of the fireplace.
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WARNING: Do not pack re­quired air spaces with insulation or other materials.
Minimum/Maximum Chimney Height for Residential Installation
The minimum height of the chimney, measured from the base of the fireplace to the flue gas outlet of the termination, is 16 feet for straight flue or a flue with one elbow set. The maximum distance between elbows is 6 feet. For systems with two elbow sets, the minimum height is 22 feet. The maximum height of any system is 50 feet. This measurement includes the fireplace, chimney sec­tions and the height of the termination assembly at the level of the flue gas outlet (see Figure 15, page 11).
Minimum/Maximum Chimney Height for Outdoor Installation
The minimum height of the chimney, measured from the base of the fireplace to the flue gas outlet of the termination, is 9.5 feet (minimum of 4 feet of chimney pipe sections required for outdoor installation).
6
Figure 1 - Framing Dimensions
Figure 2 - Corner Installation
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117541-01A
FIREPLACE INSTALLATION
FIREBOX
SAFE ZONE
Continued
Note: For outdoor installations, the fireplace en­closure must allow for adequate drainage and fresh air ventilation. It is recommended that a sealed, corrosion resistant catch pan with provision for drainage be installed under the fireplace within the fireplace enclosure.
HEARTH EXTENSION
A hearth extension projecting a minimum of 20" in front of and a minimum of 12" beyond each side of the fireplace opening is required to protect combustible floor construction in front of the fire place. Fabricate a hearth extension using a material which meets the following specifications: a layer of noncombustible, inorganic material having a thermal conductivity of K=0.84 BTU IN/FT, HR. F (or less) at 1" thick. For example, if the material selected has a K factor of 0.25, such as glass fiber, the following formula would apply:
0.25 x 1.0" = 0.30" thickness required
0.84
Thermal conductivity "K" of materials can be obtained from the manufacturer or supplier of the noncombustible material. If the hearth extension is to be covered, use noncombustible material such as tile, slate, brick, concrete, metal, glass, marble, stone, etc. Provide a means to prevent the hearth extension from shifting and seal gap between the fireplace frame and hearth extension with a non combustible material (see Figure 3).
WARNING: Hearth extension is to be installed only as shown
MANTELS
A mantel may be installed if desired (see Figure
4). Woodwork such as wood trims, mantels or any other combustible material projecting from the front face must not be placed within 12" (JM36) or 18" (JM42/50) of the fireplace opening. Combus tible materials above 12" (JM36) or 18" (JM42/50) and projecting more than 1 1/2" from the fireplace must not be placed less than 15" (JM36) or 21" (JM42/50) from the top opening of the fireplace (NFPA STD 211, Sec. 7-3.3.3).
Mantels or any other combustible material also may come up to the side edge of the black metal face of the fireplace just as long as the projection
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from the front face fall within the limit shown in Figure 4.
Combustible Material
Safe Zone for Projection of Combustible Materials
Upper
Section of
Fireplace
6"
Ref.
15" Min.
(JM36)
21" Min.
(JM42/50)
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12" Min. (JM36)
18" Min. (JM42/50)
1
12
/
" Ref.
4
33°
3" Nom.
1
1
/
" Max.
2
Fireplace Opening
in Figure 3.
Fireplace Front
Seal Gap
Ember Protector
Fireplace Front Raised Hearth
Ember Protector
Hearth
Extension
Fireplace Front Elevated
Seal Gap
Ember Protector
Figure 3 - Hearth Extension
117541-01A 7
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Top View of Fireplace
7.75" (JM36)
11.5" (JM42/50)
33°
Min. to
Perpendicular
Side Wall
12" - JM36
18" - JM42/50
Figure 4 - Mantel Clearances to
Combustible Material
3" Max.
4.5"
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VENTING INSTALLATION

OPTIONAL OUTSIDE AIR KIT (MODEL AK4/AK4F)
The installation of an outside air kit should be per­formed during the rough framing of the fireplace due to the nature of it's location. Outside combus tion air is accessed through a vented crawl space (AK4F) or through a sidewall (AK4).
CAUTION: Combustion air inlet ducts shall not terminate in attic space.
Secure to Collars with Metal Tape, Screws or Straps (Min. of 1/4" x 20" in size)
Air Inlet Location Must Allow For Bushes or Snow
LINEAL GAIN
PART NO.
Georgian Fireplace 66 1/2" 12-12DM
12-12HT
18-12DM
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18-12HT
24-12DM
24-12HT
36-12DM
36-12HT
48-12DM
48-12HT RLT-12D
RLT-12HT
STL-12D
* The lineal gain for the terminations is mea­sured to the flue gas outlet height.
12" Galvanized Outer Pipe
DESCRIPTION GAIN (IN)
Pipe Section 10 5/8"
Pipe Section 16 5/8"
Pipe Section 23 5/8"
Pipe Section 34 5/8"
Pipe Section 46 5/8"
Round Termination
Square Chase-Top
with Slip Section
7" to 15"*
7 3/4"
*
Air Inlet Eyebrow
Vented Crawl Space (Check Local Codes Before Installing in a Vented Crawl Space)
Figure 5 - Outside Air Kit
Vent Hood Required for Wall Installation
CHIMNEY PIPE
The DESA chimney system consists of 12, 18, 24, 36 and 48" snap-lock, double-wall pipe segments, planned for maximum adaptability to individual site requirements. Actual lengths gained after fitting overlaps must be taken into consideration (lineal gain) and are given in the lineal gain chart (see Figure 6). Lineal Gain is the actual mea surable length of a part after two or more parts are connected. For Canada, use chimney parts designated "HT".
WARNING: The opening in the collar around the chimney at the top of the fireplace must not be obstructed. Never use blown insula­tion to fill the chimney enclosure.
3
"
/
12
8
Stainless Inner Pipe
Figure 6 - Lineal Gain
Hemmed End
ASSEMBLY AND INSTALLATION OF DOUBLE WALL CHIMNEY SYSTEM
Each double wall chimney section consists of a galvanized outer pipe, a stainless steel inner flue pipe and a wire spacer. The pipe sections must be as­sembled independently as the chimney is installed. When connecting chimney directly to the fireplace, the inner flue pipe section must be installed first with the lanced side up. The outer pipe section can then be installed over 5 the flue pipe section with the hemmed end up. Press down on each pipe section
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until the lances securely engage the hem on the fire place starter. The wire will assure the proper spacing between the inner and outer pipe sections.
Continue to assemble chimney sections as outlined above, making sure that both the inner and outer pipe sections are locked together. When install ing double wall snap-lock chimney together, it is important to assure the joint between the chimney sections is locked. Check by pulling chimney upward after locking. The chimney will not come apart if properly locked. It is not necessary to add screws to keep the chimney together (exception
- see Figure 9, page 10).
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117541-01A
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