Enviro Ascot - Manual (Page 13)

13
Initial Installation
QUALIFIED INSTALLERS ONLY
P
LANNING
Y
OUR
I
NSTALLATION
:
When planning your installation, it will be necessary to select the proper length of vent pipe for your
particular requirements. It is important to note when passing through a wall, the maximum allowable
wall thickness is 10 inches (25.4 cm), 11⁄2 inches (3.8 cm) clearance to combustibles must be maintained.
Select the amount of vertical rise desired for “vertical-to-horizontal” type installations. To determine
the length of vent pipe required for vertical installations, measure the distance from the appliance flue
outlet to the ceiling, the ceiling thickness, the vertical rise through the attic or second story, and allow
for sufficient vent height above the roofline. For two story applications, a fire stop is required at each
floor level. If an offset is needed in the attic, additional pipe and elbows will be required. To connect the
venting system to the appliance flue outlet, a twist-lock adapter is built into the appliance at the factory.
Refer to I
NITIAL
I
NSTALLATION
- V
ENT
C
ONFIGURATION AND
R
ESTRICTOR
S
ETTINGS
for venting parameters.
Your total vent pipe length must be within the shaded area of Figure 36. If a 90° elbow is used in the
horizontal plane, 36” (91.4 cm) must be subtracted from the allowable horizontal run.
There are two (2) basic types of Direct Vent System installations. The two (2) types of installations are
shown below.
Vertical
Termination
Storm Collar
Flashing
Round Support
Box/Wall Thimble
Ceiling Firestop
Pipelength
Pipelength
Cathedral Ceiling
Support Box
Pipelength
Round Support
Box/Wall Thimble
Pipelength
Horizontal
Termination
90° Elbow
Figure 13: Common Horizontal Installation.
Figure 14: Common Vertical Installation.