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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 15 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 16). 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
*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 17). 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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 16      MULTIPLE CHASE INSTALLATION 

Figure 17                 10-FOOT RULE 

CAUTION

: Do not seal openings on the rooftop flashing.

Follow the installation instructions provided with the
termination being used. 

 

Figure 15                   TERMINATION 

Summary of Contents for C42L-FS

Page 1: ...nted 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 A DESA hood must be installed when using a vent free gas l...

Page 2: ...DE AIR KIT INSTALLATION PG 3 7 FAN BLOWER KIT ASSEMBLY PG 4 8 CHIMNEY PIPE AND OFFSET INSTALLATION PG 4 5 9 FIRESTOP SPACERS PG 5 10 FLASHING AND TERMINATION PG 6 7 11 FINISHING YOUR FIREPLACE PG 7 12...

Page 3: ...l to Opening of unit 12 minimum Top Spacers 0 minimum Mantel Clearances see page 8 Mantels Chimney Outer Pipe Surfaces 2 minimum MINIMUM MAXIMUM CHIMNEY HEIGHT The minimum height of the chimney measur...

Page 4: ...ce 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 fron...

Page 5: ...nd 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 wit...

Page 6: ...ipe passes through a framed opening into an attic space the firestop must be placed into an attic floor as shown in figure 11 PENETRATING THE ROOF OFFSET RISE A B 48 36 24 18 12 4 3 8 16 3 8 9 3 4 25...

Page 7: ...ASHING 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 cov...

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 1...

Page 9: ...lowed 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 pr...

Page 10: ...for fitting connection see figure 22 NOTE Secure incoming gas line to wood framing to provide rigidity for threaded end STEP 4 Repack insulation around gas line and into sleeve opening Seal any gaps b...

Page 11: ...ure 23 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...

Page 12: ...107805 01 PANEL CLOSURE SMOOTH 1 48 15246 LABEL 3 4 AIRSPACE CLEARANCE 1 15 107809 01 BOTTOM FIREBOX 1 49 16405 INSULATION COLLAR 1 16 107810 01 SURROUND FIREBOX 1 50 16502 BAG POLY 1 17 107811 01 SEP...

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 VC42H VC42LH C42H C42LH VC42 I VC42L I CWC42C C42 I C42L I...

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