Operating instructions

16
ENG
(see figure 6/a below)
1. Penetrating a combustible wall requires
the use of a wall thimble.
The pipe may be mortared in directly
without using a wall thimble, if the wall is
non-combustible. Install wall thimble into
wall, observing the aforementioned rules
and/or local building codes.
Select the point of wall penetration where
the minimum 1/4 “ per foot of slope (6.4
mm-0.25 in. per 305 mm-12 in.) can be
maintained.
A framed opening is required to insert the
thimble halves.
The thimble is adjustable for different wall
thicknesses.
Caulk around outside edge of plates as
necessary and fasten to wall using suitable
screws or nails.
The vent pipe must be sealed at wall
thimble as per code regarding continuous
vapor barrier.
2. The system can now be assembled through
the thimble (attach the termination first
- note “UP” arrow) and then back to the
appliance as per illustration using JOINT
PROCEDURE as described on page 21.
A gear clamp (or locking band) must be
installed around the pipe on the inside of
wall to trap pipe in position so that the
system cannot be moved in or out of wall.
This applies to both combustible and non-
combustible walls.
3. The system must be supported along its
horizontal length at all elbow locations
and joints (every forty-eight inches or less)
using straps around pipes maintaining
clearance to combustibles as per table on
page 21.
Any horizontally installed portion of a ven-
ting system shall have a slope (upwards
for Category II, III, or IV appliances or
downwards for Category III or IV applian-
ces) not less than 1/4” (6.4 mm) every 12
inches (305 mm) to prevent collection of
condensate at any location in the assem-
bly. Fasteners must not penetrate the
components of the system either when
joining pipes and fittings or using support
straps.
The lengths of pipe may be cut on non-
expanded end using aviation snips or a
hacksaw (24 tpi).
The cut end must be filed or sanded
smooth before joining. When installing the
condensate tube be sure to form a trap by
means of a 3” (76.2 mm) loop filled with
water.
This tube must be 3/8” (10 mm) ID high
temperature silicone for at least the first 6
inches (152 mm) and attached with a gear
clamp or hose clamp. The effluent must be
disposed of according to local regulations.
NOTE: Z-FLEX recommends using a neutrali-
zer kit when using a condensate trap. A con-
densate pump may be required.
Vertical venting