Legend LB 1000 Installation Operation & Maintenance - page 13
13
The Boot-Tee Drain Cover is required in order to dispose of
the condensate from the venting system. The plastic tube
(3/8 [9 mm] ID, 10 feet [3 m] long) needed to route the condensate
to a suitable drain is provided with the boiler.
1. Attach the Boot Tee Drain Cover to the appropriate leg of the
Boot-Tee, see figure 10.
2. A trap loop must be formed into the drain tube simply by looping
the tube to a minimum 3 inch (76 mm) diameter and secure
the loop with a cable tie, see figure 10.
3. Prior to final assembly the trap loop must be “primed” by
pouring a small quantity of water into the drain hose.
4. Connect the Boot-Tee and Drain Tee assembly to the boiler
vent connector, see figure 10.
5. Attach the hose to the drain fitting and run the hose to a sanitary
sewer drain maintaining the proper trap loop and following all
local, state and federal codes and regulations for draining of
acidic effluent (condensate).
FIGURE 10.
VENTING SUPPORTS
Care must be taken in the installation of the venting system that
adequate support is maintained throughout the installation
process. When extending more than 10 feet (3.0 m) vertically,
vertical support kits are required once every 10 feet (3.0 m) of
vertical run. Vertical support is also required immediately after
any transition (elbow, tee, etc.) to vertical of over 10 feet (3.0 m) of
run and after any offset in the vertical run.
The support bracket (supplied in the Vertical Support Kit) is to be
securely fastened to a solid vertical member of the building using
the appropriate fasteners; i.e., wood screws for wood framing,
machine or tapping screws for structural steel or masonry anchors
for solid masonry. The bracket should be located so that it will
not interfere with any joints of the venting system. The bottom
most support bracket should be located directly above the first
transition from horizontal to vertical, see Figure 10. Refer to figures
11, 11A, 11B and 11C.
If a means of support for the bracket is not available and horizontal
vent sections are present, install hanger straps (made from
non-combustible material) as close to the points of transition as
possible. If the horizontal portions of the vent and/or vent connector
are longer than 6 feet (2.0 m), then install hanger straps every
6 feet (2.0 m) to support the connector.
DO NOT rivet or screw the straps to the conduit or otherwise
puncture the conduit wall. Instead, wrap an extra loop of strap
around the conduit to hold it in position, or attach the strap to
the center screw of the double wall AL 29-4C
®
vent coupling, if
applicable.
VERTICAL INSTALLATION REQUIREMENTS
1. The vent system must terminate at least three (3) feet [1.0 m]
and no more than six (6) feet [2.0 m] above the roof line and no
closer than ten (10 ) feet [3.0 m] from any wall or vertical
structure. If the exhaust vent terminal is within 10’ (3.0 m) of a
wall or parapet, it must extend a minimum of 2’ (610 mm)
above the wall or parapet. See figures 9 and 11A.
2. For direct vent installations, the total distance of the vent system
from the boiler vent connector to the vertical vent termination
shall not exceed ninety (90) equivalent feet [27.4 m]. A
maximum of three (3) 90° elbows can be used. Minimum
vertical vent is nine (9) equivalent feet [2.7 m] for direct vent
installations. For standard installations where no air intake
piping is included, the total distance can be extended to
180 equivalent feet [54.9 m] with a maximum of five (5)
90° degree elbows. Standard minimum vertical vent length is
five (5) feet [1.5 m]. See figures 9, 11A, 11B, and 11C for
differences between standard and direct vent installations.
3. An AL 29-4C
®
Vent Vertical Vent Terminal must be used at the
termination.
4. Maintain a minimum of six (6) feet [2.0 m] separation between
the air intake and the exhaust terminals.
HORIZONTAL INSTALLATION REQUIREMENTS
1. The vent system must terminate with a AL 29-4C
®
Vent
Through-the-Wall Termination (TWT). Plan the terminal
location based on the dimensions given in figure 8. Do not
locate the terminal within eight (8) feet (2.5 m) of an inside
corner of a building or adjacent to outside walls, shrubs or
other such objects that may cause adverse wind conditions in
the immediate area.
2. The TWT shall be located not less than 12 inches (305 mm)
above grade or, in geographical areas where snow
accumulates, no less than 12 inches (305 mm) above the
anticipated snow line. Ensure that the TWT is protected
against blockage which may occur during ice buildup or
snowstorms.
The TWT shall terminate at least three (3) feet [1.0 m] above
any forced air inlet within ten (10) feet [3.0 m], except when the
forced air inlet is the combustion air intake of a direct vent
appliance. The TWT shall terminate at least four (4) feet
[1.2 m] below, four (4) feet [1.2 m] horizontally from or one (1)
foot [305 mm] above any door, window or gravity air inlet into
any building as provided in the latest edition of the NATIONAL
FUEL GAS CODE ANSI Z223.1, see figure 8. For Canadian
installations consult CSA B149.1-00 (and latest addenda).
In addition, a minimum clearance of four (4) feet (1.2 m)
horizontally from, and in NO CASE ABOVE OR BELOW, unless
the four (4) feet [1.2 m] of horizontal distance is maintained
from electric meters, gas meters, regulators and relief
equipment.
3. For direct vent installations, the total horizontal distance of the
vent system from the boiler vent connector to the outside of the