13
USING FLEXIBLE VENT COMPONENTS
FIGURE 19
ELBOW 
SPACERS
!WARNING
Do not allow the inside vent pipe to bunch up on horizontal or vertical runs and elbows. Keep it pulled tight. A 1 1/4” air gap between the liner and the outer liner all around is required for safe operation. A spacer is required at the start, middle and end of each elbow to ensure this gap is maintained. Spacers are attached to the inner flexible vent pipe at predetermined intervals to maintain a 1 1/4" air gap to the outer flexible vent pipe. These spacers must not be removed.
For safe and proper operation of the fireplace, follow the venting
instructions exactly.
All inner exhaust and outer intake vent pipe joists may be sealed using either red RTV high temp silicone sealant or black high temp Mill Pac with the exception of the fireplace exhaust flue collar which must be sealed using Mill Pac (not supplied).
Use only approved flexible vent pipe kits marked:
“Wolf Steel Approved Venting” as identified by the stamp only on the 7” outer vent pipe.
Six inches (6”) is the minimum bend radius allowed for the seven inch (7”) diameter flexible vent pipe.
HORIZONTAL AIR TERMINAL INSTALLATION
Note: Direct vent terminals shall not be recessed
into a wall or | CAULKING |
| |
siding. | 5"FLEX |
1. Stretch the | |
4" diameter | PIPE |
| |
flexible vent pipe | 8" FLEX PIPE |
to the required | 2" OVERLAP |
length taking into |
|
account the | |
additional length | SEALANT |
needed for the finished wall surface. Slip the liner a minimum of 2" over the inner sleeve of the air terminal and secure with 3 #8 screws. Apply a heavy bead of the high temperature sealant
2.Using the 7” diameter flexible vent pipe, slide over the outer combustion air sleeve of the air terminal and secure with 3 #8 screws. Seal as before.
3.Insert the vent pipe through the firestop maintaining the required clearance to combustibles. Secure to the exterior wall and make weather tight by sealing with caulking
4.If more vent pipe needs to be used to reach the fireplace, couple them together as illustrated in (Fig. 20). The vent system
must be supported | HIGH TEMP |
|
approximately every 3 | SEALANT | #8 X 1/2” SELF DRILLING |
feet for both vertical |
| SCREWS & WASHERS |
| 4” COUPLER 7” COUPLER | |
and horizontal runs. |
| |
|
| |
Use |
|
|
strapping to maintain | 7” FLEX | 7” FLEX PIPE |
the minimum 1” | 4” FLEX | |
clearance to combus- | PIPE | |
| PIPE | |
tibles. |
| FIGURE 21 |
For optimum performance it is recommended that all horizontal runs have a minimum 1” rise per foot using flexible venting.
VERTICAL AIR TERMINAL INSTALLATION
1. Move the fireplace into position.
2.Fasten the roof support to the roof using the screws provided. The roof support is optional. In this case the venting is to be adequately supported using either an alternate method
suitable to the authority having jurisdiction or the optional roof support.
3.Stretch the inner flexible vent pipe to the required length. Slip the liner a minimum of 2” over the inner vent pipe of the air terminal connector and secure with 3 #8 screws. Seal using a heavy bead of the high temperature sealant
4.Repeat using the outer
flexible vent pipe. | INNER |
5. Thread the air terminal | PIPE |
| |
connector / pipe assembly |
|
down through the roof. The air |
|
terminal must be located |
|
vertically and plumb. Attach the air terminal connector to the roof support, ensuring that the top of the air terminal is 16” above the highest point that it penetrates the roof. If the attic space is tight, we recom-
mend threading the Wolf Steel vent pipe collar or equivalent loosely onto the air terminal assembly as it is passed through the attic.
6. Remove nails from the shingles, above and to the
sides of the chimney. Place the flashing over the air terminal connector leaving a min. 3/4” of the air terminal connector showing above the top of the flashing. Slide the flashing underneath the sides and upper edge of the shingles. Ensure that the air terminal connector is properly centred within the flashing, giving a 3/4” margin all around. Fasten to the roof. Do not nail through the lower portion of the flashing. Make