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TERMINATIONS / SPARK ARRESTOR 
 

The fireplace system must be terminated with the listed round 
top or chase terminations.  In any case, refer to the installation 
instructions supplied with the termination.  The terminations 
approved for this fireplace are the RT-8DM and RTL-8DM 
that can be used for flashing or chase and ET-8DM, ETO-
8DM, ETL-8DM and ETLO-8DM for chase style termination 
only. Figure 14 shows an RTL-8DM round top termination. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 

 
Terminations with 16” slip pipe sections are available.  The 
RTT-8DM and RTTL-8DM are approved for flashing 
installations.  When needed, these adjustable terminations may 
be used in combination with the pipe assembly to achieve the 
correct chimney height. 
 

NOTE: 

In the rare instance there is a problem with the side 

driven rain or wind or the chimney is not drafting properly, an 
ADS-8DM Anti Draft Shield can be used with round 
terminations. 
 

CHASE INSTALLATIONS 
 

Instructions for chase installations are included with the chase 
style termination chosen.  In a multiple chase installation, be 
sure to provide adequate distance between terminations to 
prevent smoke spillage from one termination to another.  We 
suggest that terminations be separated at least 24 inches, 
center to center and stacked at vertical height difference of 18 
inches (see figure 15). 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
*NOTE: If a decorative shroud is to be installed, contact the 
manufacturer for specifications. 
 

10-FOOT RULE 
 

All flue gas outlet of chimney termination must extend a 
minimum of 3 feet in height above the highest point where it 
passes through the roof and must be at least 2 feet above the 
highest point of the roof that is within a horizontal distance of 
10 feet (see figure 16). 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
FINISHING THE FIREPLACE 
 

Combustible materials, such as wallboard, gypsum board, 
sheet rock, drywall, plywood, etc. may make direct contact 
with sides and top periphery of the fireplace face. It is 
important that combustible materials do not overlap the face 
itself.  Brick, glass, tile or other non-combustible materials 
may overlap the front face provided they do not obstruct 
essential openings like louvered slots or any other opening.  
When overlapping with a non-combustible facing material, 
use only non-combustible mortar or adhesive. 
 

Figure 15      MULTIPLE CHASE INSTALLATION 

Figure 16                 10-FOOT RULE 

CAUTION

: Do not seal openings on the rooftop flashing.

Follow the installation instructions provided with the
termination being used. 

 

Figure 14                   TERMINATION 

Summary of Contents for VS42 Series

Page 1: ... RGA 2 72 standards or for use with a vent free gas log heater approved to ANS Z21 11 2 standard A DESA hood must be installed when using a vent free gas log heater see Accessories p 12 WARNING Always leave glass doors fully opened or fully closed when operating this fireplace S42 42 textured white refractory brick S42H 42 textured white herringbone refractory brick S42R 42 textured red refractory...

Page 2: ...TION PG 3 6 OUTSIDE AIR KIT INSTALLATION PG 3 7 CHIMNEY PIPE AND OFFSET INSTALLATION PG 4 5 8 FIRESTOP SPACERS PG 5 9 FLASHING AND TERMINATION PG 6 7 10 FINISHING YOUR FIREPLACE PG 7 11 MANTELS PG 8 12 GLASS DOORS PG 8 13 GAS LINE INSTALLATIONS PG 9 14 DAMPER OPERATION PG 10 15 TECHNICAL SERVICE PG 10 16 ILLUSTRATED PARTS PG 11 11a 17 REPLACEMENT AND TECHNICAL PARTS PG 12 ...

Page 3: ...TIAL INSTALLATION The minimum height of the chimney measured from the base of the fireplace to the flue gas outlet of the termination is 14 5 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 sectio...

Page 4: ...rough flanges located on the sides of the fireplace HEARTH EXTENSION A hearth extension projecting a minimum of 16 in front of and a minimum of 8 beyond each side of the fireplace opening is required to protect combustible floor construction in front of the fireplace Fabricate a hearth extension using a material which meets the following specifications a layer of non combustible inorganic material...

Page 5: ...dependently as the chimney is installed When connecting chimney directly to For Canada use chimney parts designated HT 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 the flue pipe section with the hemmed end up Press down on each pipe section until the lances securely engage the hem on the fireplace starte...

Page 6: ...re 9 They also provide complete separation from one floor space to another or attic space as required by most codes When the double wall pipe passes through a framed opening into an attic space the firestop must be placed into an attic floor as shown in figure 10 OFFSET RISE A B 48 36 24 18 12 4 3 8 16 3 8 9 3 4 25 1 2 1 12 3 4 30 3 4 1 15 34 3 4 1 18 40 1 1 21 1 4 46 1 4 1 23 3 4 49 1 4 1 1 27 3 ...

Page 7: ...LASHING INSTALLATION V6F 8DM or V12F 8DM Determine the flashing to be used with the roof opening chart Slide flashing over pipe until base is flat against roof Replace as many shingles as needed to cover exposed area and flashing base Secure in position by nailing through shingles see figure 13 DO NOT NAIL THROUGH FLASHING CONE INSTALLING FLASHING ON A METAL ROOF When installing the flashing on a ...

Page 8: ... prevent smoke spillage from one termination to another We suggest that terminations be separated at least 24 inches center to center and stacked at vertical height difference of 18 inches see figure 15 NOTE If a decorative shroud is to be installed contact the manufacturer for specifications 10 FOOT RULE All flue gas outlet of chimney termination must extend a minimum of 3 feet in height above th...

Page 9: ...he combustion air gate is not completely open The following tips should be followed to assure that both the fireplace and the glass door retain their beauty and function properly Both the flue damper and the glass doors must be fully opened before starting the fire This will provide sufficient combustion air and maintain safe temperatures in the firebox IMPORTANT The glass must be allowed to warm ...

Page 10: ...framing to provide rigidity for threaded end STEP 4 Repack insulation around gas line and into sleeve opening Seal any gaps between gas line and refractory knockout hole with refractory cement or commercial furnace cement Install the gas appliance or cap off gas line if desired NOTE A DESA hood must be installed when using an unvented gas log set see accessories on page 12 If you install a decorat...

Page 11: ...gure 21 Pulling the handle out will free the outside air door to open Pushing the handle in will lock the door close FOR FURTHER OPERATING GUIDELINES INSTRUCTIONS AND WARRANTY INFORMATION PLEASE REFER TO YOUR HOMEOWNERS GUIDE OR CONTACT YOUR AUTHORIZED DEALER TECHNICAL SERVICE You may have questions about installation operations or troubleshooting If so contact the Technical Service Department at ...

Page 12: ...7839 01 107839 01 107839 01 18 FIREBOX TOP ASSEMBLY 1 106694 02 106694 02 106694 02 106694 02 106694 02 106694 02 19 AIR KIT DOOR ASSEMBLY 1 106703 01 106703 01 106703 01 106703 01 106703 01 106703 01 20 FACE WELDMENT 1 111093 01 111093 01 111093 01 111093 01 111093 01 111093 01 21 AIR DEFLECTOR 1 110892 02 110892 02 110892 02 110892 02 110892 02 110892 02 22 FIREPLACE TOP INSULATION 1 107824 01 1...

Page 13: ... 11a For more information visit www desatech com ILLUSTRATED PARTS ...

Page 14: ... 12 For more information visit www desatech com REPLACEMENT PARTS ACCESSORY PARTS SEE PARTS LIST ON PAGE 11 FOR PART NUMBERS ...

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