Outdoor Venting - RBI LCD Series Installation & Operation Manual

Horizontal vent systems shall terminate at least 4 ft,
1.3 m below, 4 ft, 1.3 m horizontally from or 1 ft, 0.23 m
above any door, window or gravity air inlet into any
building. It must not terminate less than 4 ft, 1.3 m
horizontally from, and in no case above or below, unless
a 4 ft, 1.3 m horizontal distance is maintained, from
electric meters, gas meters, regulators and relief
equipment and not less than 7 ft, 2.3 m from any adjacent
public walkway. The bottom of the vent terminal(s) shall
be located at least 5 ft, 1.5 m above the air intake
terminal(s) unless there is a minimum 5 ft, 1.5 m
horizontal separation between them. Avoid terminal
locations likely to be affected by winds, snowdrifts, people
and pets. Protect building materials and vegetation from
degradation caused by the flue gases.
Vertical Direct Vent Systems - Figure 6
The maximum length for the ver tical vent and
combustion air pipes is 35 ft, 10.8 m plus two 90˚
elbows. If any part of a single wall metal vent system
passes through an unheated space it must be insulated
with insulation rated for 400˚F, 204˚C . Structural
penetrations must be made using approved fire-stops.
A listed, nonrestrictive vent cap must be used. The top
of a vertical vent system must extend at least 5 1/2 ft,
1.8 m above the roof surface that it passes through,
4 ft, 1.3 m above the intake air cap, see Figure 6.
HORIZONTAL VENT,
NEGATIVE PRESSURE
In this configuration a wall-mounted power venter must
be used to pull the flue products horizontally from the
unit and vent them to the outdoors, see Figures 3, 4 &
5. The air for combustion is taken from the space in
which the unit is installed, or from the outdoors. The
applicable instructions under the "COMBUSTION AIR
& VENTILATION SECTION" must be followed!
To maximize the performance of single wall sheet metal
vent systems locate 90˚ elbows as far from the boiler
as possible and from one another. For best results,
horizontal vent systems should be as short and straight
as possible.
When horizontal vent runs exceed 5 ft, 1.5 m they
must be supported at 3 ft, 0.98 m intervals with
overhead hangers. The vent system must be pitched
down, toward the vent terminal, 1/4 in/ft, 21 mm/m .
If any part of a single wall metal vent system passes
through an unheated space it must be insulated with
insulation rated for 400˚F, 204˚C .
LCD INSTALLATION AND OPERATION INSTRUCTIONS
Horizontal vent systems shall terminate at least 4 ft,
1.3 m below, 4 ft, 1.3 m horizontally from or 1 ft,
0.23 m above any door, window or gravity air inlet
into any building. It must not terminate less than
4 ft, 1.3 m horizontally from, and in no case above
or below, unless a 4 ft, 1.3 m horizontal distance
is maintained, from electric meters, gas meters,
regulators and relief equipment and not less than 7 ft,
2.3 m from any adjacent public walkway. The bottom
of the vent terminal(s) shall be located at least 5 ft, 1.5
m above the air intake terminal(s) unless there is
a minimum 5 ft, 1.5 m horizontal separation between
them. Avoid terminal locations likely to be affected by
winds, snowdrifts, people and pets. Protect building
materials and vegetation from degradation caused by
the flue gases.
To determine the appropriate power venter for the
boiler/water heater, see Table 5. Follow the power venter
manufacturer's installation instructions.
Table 5 - Power Venter Sizes
LCD Power Venter
Model Model
225 - 300 HS-1
400 HS-2
600 HS-2
750-900 HS-3
1050-1200 HS-4
1480-2300 HS-5
*Choose HS115-2 for 100 ft. Max. Pipe length
**Choose HS-3 for 100 ft. 31 m , Max. Pipe Length

OUTDOOR VENTING

When installed outdoors the LCD must be fitted with
the factory supplied outdoor vent hood and air intake
hood, see Figure 8. Multiple units must be spaced per
Figure 9.
The boiler/water heater must be at least 10 ft, 3.0 m
from any door, window or gravity air inlet into any
building and at least 3 ft, 0.9 m from any overhang
unless local codes dictate differently.
CAUTION: Do not place the boiler/water heater in a
location that would subject it to runoff from adjacent
buildings or damage may occur voiding the
warranty!
Page 11
Max. Pipe Length
FT m
30* 9.3
100 31.0
67** 20.8
100 31.0
100 31.0
100 31.0