14
Note: See Framing and Dimension Chart for the sizes of the ceiling and roof openings. The size of the roof opening varies with the degree of pitch of the roof.
Offset Elbow Assembly
Offset elbows install the same as chimney sections. First, snap the inner section INTO the preceding inner section of flue. Check connec- tion by pulling up slightly to ensure a tight fit. Next, the outer sections snap lock OVER the preceding outer section of chimney. Again, check outer section by pulling up slightly to ensure proper connection is made.
Return Elbow Assembly
Return elbows install the same way as round terminations and stabilizers:
Step 1. Hold return elbow over top of last chimney section.
Step 2. Center inner slip section into inner flue
Step 3. Center
Step 4. Pull up slightly on return elbow to ensure locking joint has firmly engaged.
Step 5. Secure support straps to framing members by nailing under tension in sheer (Figure 39 ).
Return
Elbow
Figure 39
Note: The return elbow assembly performs the same function as a stabilizer. Consider this when determining the need for a stabilizer.
Note: Do not apply excessive pressure to any subsequent chimney section following return elbow assembly when installing. Ensure that each subsequent chimney section is securely attached by testing as noted above.
Combustion Air Kits
The installation of an outside combustion air kit is highly recommended. It is very impor- tant to ensure good fireplace operation in homes which are tightly weather sealed or have ventilating appliances installed.
Step 1. Determine the source for outside air, which can be installed through an outside wall or into a ventilated crawl space. In either case, a 4 1/2" diameter hole will be required for installation of the air inlet assembly.
CAUTION: AVOID INSTALLING THE AIR IN- LET WHERE THE OPENING COULD BE BLOCKED BY SNOW, BUSHES OR OTHER OBSTACLES. THE MAXIMUM HEIGHT FOR THE OUTSIDE AIR IS 50 FEET ABOVE THE HEARTH, PROVING THE AIR INLET IS TERMI- NATED A MINIMUM OF THREE (3) FEET BE- LOW THE CHIMNEY CAP LEVEL.
Note: Combustion air inlet ducts must not terminate in attic space.
AIR INLET
EYEBROW
ASSEMBLY
FOAK
Figure 40
Step 2. Install the air inlet eyebrow
Step 3. With the two remaining sheet metal screws and the two clamp brackets supplied, secure the duct to the air gate assembly as shown in Figure 41.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 41
OPTIONAL EQUIPMENT
CONSIDERATIONS
Gas Line Connection
Install a ¹⁄₂" gas supply line through fireplace wall for connection to a decorative gas appli- ance inside the firebox. Outside, the gas supply line connects to a gas
Always plumb gas line installation per local codes. Check all connections with soap suds; leaks will bubble. Never test any gas line con- nection with a match or open flame.
This provision is intended for connection to a decorative gas appliance incorporating an au- tomatic
Vent Free Appliances
These units have been tested and approved to ANSI/IAS/AGA Z21.11.2 for use with unvented gas appliances and complies with the stan- dard for
The unit has been tested for use with any unvented gas log sets having a maximum rating of 40,000 BTU. The minimum mantle configurations are outlined in Figure 42.