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A gas line may be installed for the purpose of installing a 
vented or vent-free gas appliance available through your local 
distributor.  Use a ½” black iron pipe and appropriate fittings.  
When installing a gas line, a shut-off valve designed for 
installation outside the appliance is recommended. 
 
STEP 1: To install, remove the knockout indentation on the 
firebrick wall located approximately 2 inches above the 
refractory hearth floor on the required side.  The knockout 
indentation must be firmly tapped with any solid object until it 
is released.  Remove fragmented portions of refractory (see 
figure 8). 

 
STEP 2: Remove gas line cover plate on rear of fireplace and 
pull out insulation from gas line conduit sleeve.  Save 
insulation for reuse. 
 
STEP 3: Run a ½” (I.D.) black iron gas line into the fireplace 
through the gas line conduit sleeve (if using a raised platform, 
add height).  Provide sufficient gas line into fireplace chamber 
for fitting connection (see figure 9). 

 
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 between gas line and refractory 
knockout hole with refractory cement or commercial furnace 
cement.  Install the decorative gas appliance or cap-off gas 

line if desired.  Follow the manufacturer’s installation 
instructions provided with the gas appliance. 

 

VENT-FREE GAS LOG INSTALLATION: 

 
If you wish to install an unvented gas log set, only unvented 
gas log sets, which have been found to comply with the 
standard for unvented room heaters, ANS Z21.11.2, are to be 
installed in this fireplace. 
 

NOTE:

  A DESA hood must be installed when using an 

unvented gas log set (see accessories on page 11). 
 

 

VENTED GAS LOG INSTALLATION: 

 
If you install a decorative gas appliance (vented gas log), the 
decorative gas appliance must comply with the Standard for 
Decorative Gas Appliance for Installation in solid fuel burning 
fireplace, ANS Z21.60-1996, Z21.84 or RGA 2-72, and shall 
also be installed in accordance with the National Fuel Gas 
Code, ANS Z223.1-1996.  
 

 

COLD CLIMATE INSTALLATIONS: 
 

The following installation procedures are recommended when 
installing a fireplace system in a cold climate area.  Following 
these steps will aid in reducing cold air infiltration from the 
fireplace enclosure into living space. 
 
1.

 

The fireplace must be placed on a solid continuous 
surface.       You should insulate under the fireplace in all 
cold climate areas. 

2.

 

In the case of a raised platform or cantilevered chase, you 
should insulate under the structure to reduce air 
infiltration. 

3.

 

Insulate the walls of the chase, both on the outer and 
interior partitioning wall (see figure 10).  Clearances from 
pipe to insulating materials must be maintained. 

4.

 

Using a firestop spacer in the chase at the ceiling level is 
recommended for safety and reducing cold air movement 
(see accessories on page 11). 

 

Figure 8            GAS LINE KNOCKOUT 

Figure 9       GAS LINE INSTALLATION 

 CAUTION:

All gas piping and connections must be 

tested for leaks after the installation is completed.  After 
ensuring that the gas valve is on, apply a soap and water 
solution to all connections and joints.  Bubbles forming 
show a leak.  Correct all leaks at once.  DO NOT USE AN 
OPEN FLAME FOR LEAK TESTING AND DO NOT 
OPERATE ANY APPLIANCE IF A LEAK IS 
DETECTED.

 WARNING:

Do not operate an unvented gas log set in 

this fireplace with the chimney removed. 

 WARNING:

 When using a decorative gas appliance, 

the damper must be removed or permanently locked in the 
fully opened position.

Summary of Contents for 42C

Page 1: ...ndard A DESA hood must be installed when using a vent free gas log set See accessories on pg 11 WARNING ALWAYS LEAVE GLASS DOORS FULLY OPENED OR FULLY CLOSED WHEN OPERATING THIS FIREPLACE DESA INTERNATIONAL 2701 INDUSTRIAL DRIVE P O BOX 90024 BOWLING GREEN KY 42102 9004 www desatech com PN 54016 REV B 10 00 SAVE THIS BOOK This book is valuable In addition to instructing you on how to install your ...

Page 2: ...ALLING THE FIREPLACE PG 3 8 HEARTH EXTENSION PG 4 9 OUTSIDE AIR KIT PG 4 10 GAS LINE INSTALLATION PG 4 11 VENT FREE GAS LOG INSTALLATION PG 5 12 COLD CLIMATE INSTALLATIONS PG 5 13 CHIMNEY PIPE PG 6 7 14 PENETRATING THE ROOF PG 8 15 FLASHING INSTALLATION PG 9 16 STORM COLLAR INSTALLATIONS PG 9 17 TERMINATIONS PG 9 18 FINISHING THE FIREPLACE PG 10 19 MANTEL CLEARANCES PG 10 17 REPLACEMENT AND ACCESS...

Page 3: ...ortant step in ensuring safe and continuous operation of this fireplace SELECTING LOCATION To determine the safest and most efficient location for your fireplace consider the following guidelines The location must allow for all proper clearances see page 3 The location should be in a place where the fireplace will not be affected by drafts such as air condition ducts windows or doors A location th...

Page 4: ...e level of the fireplace and shim with sheet metal if necessary STEP 5 Before securing fireplace to prepared framing the ember protector provided must be placed between hearth extensions not supplied and under the bottom front edge of the fireplace 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 b...

Page 5: ...IT MODELS AK4 OR AK4F The outside air kit must be installed during the rough framing of the fireplace due to the nature of its location Outside combustion air can be accessed through an exterior wall Model AK4 or a vented crawl space Model AK4F See figure 6 and Accessories on page 11 Avoid installing outside air eyebrow in areas where inlet opening may be blocked by snow bushes or other obstacles ...

Page 6: ...t be installed when using an unvented gas log set see accessories on page 11 VENTED GAS LOG INSTALLATION If you install a decorative gas appliance vented gas log the decorative gas appliance must comply with the Standard for Decorative Gas Appliance for Installation in solid fuel burning fireplace ANS Z21 60 1996 Z21 84 or RGA 2 72 and shall also be installed in accordance with the National Fuel G...

Page 7: ...e wall pipe segments planned for maximum adaptability to individual site requirements Actual lengths gained lineal gain after fitting overlaps must be taken into consideration see figure 12 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 attach...

Page 8: ...as required by most codes When the double wall pipe passes through a framed opening into an attic space the firestop must be place into the attic floor as in figure 16 When the pipe passes through a framed opening into a living space above the firestop must be placed onto the ceiling from below as shown in figure 16 1 elbow set 16 to 60 ft system height 2 elbow sets 30 to 60 ft system height Figur...

Page 9: ...ure 19 to determine the correct opening length and flashing required STEP 4 Remove the shingles around the opening measured and cut out this section STEP 5 Add the next sections of the pipe until the end penetrates the roofline Check to see that the proper clearances are maintained Extend chimney by adding sections of double wall pipe until pipe is a minimum of 30 inches above the highest point of...

Page 10: ...lashing or chase and ETL 8DM for chase style termination only Figure 21 shows an RTL 8DM round top termination FOLLOW THE INSTALLATION INSTRUCTIONS PROVIDED WITH THE TERMINATION BEING USED 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...

Page 11: ...e placed at least 9 inches above the opening of the fireplace see figure 25 Combustible materials above 9 inches and projecting more than 1 inches from the front face of the fireplace must be place at least 12 inches above the fireplace opening Ref NFPA std 7 3 3 3 Mantels or any other combustible material may butt up to the side of the black metal face of the fireplace The clearances from the sid...

Page 12: ...n visit www desatech com Desa International 2701 Industrial Drive P O Box 90024 Bowling Green KY 42102 9004 www desatech com 800 323 5190 ACCESSORY PARTS REPLACEMENT PARTS CONTACT YOUR LOCAL DEALER CONTACT YOUR LOCAL DEALER ...

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