Step 3. Install The Vent System; Vertical Termination Systems - Lennox ELDV-45NE Installation Instructions Manual

Step 3. INSTALL THE VENT SYSTEM

General Information
These instructions should be used as a guide-
line and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and -
B149.2 in Canada.
These fireplaces are designed, tested
and listed for operation and installation
with, and only with, Secure Vent™ Direct
Vent System Components, Secure Flex™
Flexible Vent Components manufactured
by Security Chimneys International and
Z-FLEX™ Model GA Venting Systems
listed to UL1777 and ULCS635 manufac-
tured by Flexmaster Canada Limited.
These approved vent system components
are labeled for identification. DO NOT
use any other manufacturer's vent com-
ponents with these appliances.
These fireplaces must be vented directly
to the outside.
Determine the venting for the appliance. If the
vent run will include at least 8 feet of vertical
rise, then install the second restrictor in the
appliance collar before connecting any vent
(Refer to Figure 12 ). Place the second restric-
tor inside the fixed restrictor.
Note: The second restrictor is included within
the firebox.
Exhaust Vent
Figure 12
10
The vent system may not service multiple
appliances, and must never be connected to a
flue serving a solid fuel burning appliance. The
vent pipe is tested to be run inside an enclos-
ing wall (such as a chase). There is no require-
ment for inspection openings in the enclosing
wall at any of the joints in the vent pipe.
Select Venting System - Horizontal or Vertical
With the appliance secured in framing, deter-
mine vent routing and identify the exterior
termination location. The following sections
describe vertical (roof) and horizontal (exterior
wall) vent applications. Refer to the section
relating to your installation. A list of approved
venting components is shown in the tables on
page 26.
VERTICAL TERMINATION SYSTEMS (ROOF)
Figures 13, and 23 through 25 on pages 14
and 15 and their associated Vertical
Vent Tables illustrate the various vertical vent-
ing configurations that are possible for use with
these appliances. Secure Vent pipe applica-
tions are shown in these figures; Secure Flex
pipe may also be used.
A Vertical Vent Table summarizes each system's
minimum and maximum vertical and horizontal
length values that can be used to design and
install the vent components in a variety of
applications.
Both these vertical vent systems terminate
through the roof. The minimum vent height
above the roof and/or adjacent walls is speci-
fied in ANSI Z223.1-(latest edition) (In Canada,
the current CAN-1 B149 installation code) by
major building codes. Always consult your
Fixed
Restrictor
local codes for specific requirements. A gen-
eral guide to follow is the Gas Vent Rule (refer
to Figure 4 on page 6 ).
Second
Restrictor
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Vertical (Straight) Installation
Determine the number of straight vent sec-
tions required. 4-1/2" (114 mm), 10-1/2" (267
mm), 22-1/2" (572 mm), 34-1/2" (876 mm)
and 46-1/2" (1181 mm) net section lengths are
available. Plan the vent lengths so that a joint
does not occur at the intersection of ceiling or
roof joists. Refer to the Vent Section Length
Chart.
Figure 13