Zero
Clearance
Sleeve
Firestop
CFM133
Fig. 17 Firestop and zero clearance sleeve in place.
Finished Wall
Vent Termi- nation
FP1005
Fig. 18 Side view of final unit location.
Rear Wall Vent Installations -
Flex Vent Pipe
Follow Steps 1 and 2 on Page 13.
Step 3
Install the 4” (102mm) flex vent pipe to the appliance collars described in “General Information Assembling Vent Pipes”, Page 11. If the installation requires a 45° angle, grasp the vent pipe close to the appliance collar and bend to 45°. DO NOT exceed 45°. (Fig. 19)
Install the 7” vent pipe in the same manner as Step 2.
NOTE: There must be a 1” (25 mm) rise in a 24” (610mm) length of flex vent.
Step 4
Assemble the flex vent to the collars on the termination as you did on the appliance.
LDVR Series Direct Vent Gas Fireplace
Termination
Flex Section
Appliance Collars
FP1473
Fig. 19 Grasp the vent pipe close to the collar and bend to 45° angle. Do not exceed 45°.
Rise
FP1472
Fig. 20 There must be a 1/2” rise per foot length.
Vertical Sidewall Applications
Since it is very important that the vent- ing system maintain its balance between the combustion air intake and the flue gas exhaust, certain limitations as to vent configurations apply and must be strictly adhered to.
The Vent Graph shows the relationship between vertical and horizontal side wall venting and will help to deter- mine the various dimensions allowable.
Minimum clearance between vent pipes and combustible materials is 1”(25 mm) on top, bottom and sides unless otherwise noted.
When vent termination exits through foundations less than 20” below siding outcrop, the vent pipe must flush up with the siding. It is always best to locate the fireplace in such a way that minimizes the number of offsets and horizontal vent length.
The horizontal vent run refers to the total length of vent pipe from the flue collar of the fireplace to the face of the outer wall.
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