Modine HDS Manuel D'installation page 10

INSTALLATION - VENTING
Section D – Concentric Vent System
Installation
D1. This section applies to both horizontally and vertically
vented concentric vent systems as defined in "Section A –
General Instructions – All Units", and is in addition to the
instructions in that section.
D2. When utilizing the concentric vent option, it should have
been predetermined whether the appliance will be
horizontally or vertically vented. Before proceeding, verify
that the concentric vent kit received contains the correct
components for the installation:
For Vertically Vented Units (Refer to Figure 10.1):
j Concentric adapter assembly (same for horizontal and
vertical kits)
k Standard listed vent cap
l Specially designed inlet terminal (part #5H0751540001)
Figure 10.1 - Vertical Concentric Vent Kit
Components
Combustion Air
Inlet Terminal
Concentric
Vent Adapter
Box
Combustion Air
For Horizontally Vented Units (Refer to Figure 10.2):
j Concentric adapter assembly (same for horizontal and
vertical kits)
k Special vent termination cap (part #5H0751500001)
l Special inlet air guard
Figure 10.2 - Horizontal Concentric Vent Kit
Components
10
Outlet Vent
Termination Cap
6" Min.
* Size according
12" Min.*
to expected
snow depth.
Building
Roof / Ceiling
Exhaust
6-584.11
CAUTION
The concentric vent adapter box must be installed inside of
the structure or building. Do not install this box on the exterior
of a building or structure.
D3. Once the kit contents have been verified as correct for the
direction of venting, the concentric vent adapter box is to
be installed. Determine the location of the box. Be sure to
maintain all clearances as listed in these instructions.
D4. The adapter box is to be mounted on the interior side of
the building. It must not be mounted outside the building.
The adapter box has integral mounting holes for ease of
installation.
D5. The adapter box can be mounted flush to the wall (for
horizontal kits) or to the ceiling (for vertical kits). The box
can also be offset from the wall or ceiling by using field
supplied brackets. When mounting the box, consider
serviceability and access to the vent and combustion air
pipes. If the box is to be mounted using field supplied
brackets, these brackets must be strong enough to rigidly
secure the box to the wall or ceiling, and should be made
from corrosion resistant material.
D6. Determine the length of the vent pipe and combustion air
inlet pipe for the selected location. THE VENT PIPE WILL
PASS THROUGH THE CONCENTRIC VENT BOX. THE
LAST SECTION OF VENT PIPE IS A CONTINUOUS
LENGTH OF DOUBLE WALL "B" VENT. See section A12
for attaching and terminating double wall pipe. Begin with
pipe lengths on the concentric pipe side of the adapter box
referring to Figures 10.1 and 10.2. These pipes will extend
through the building wall or roof as well as any added length
for the thickness of the wall and the offset from any field
installed brackets.
For Vertical Concentric Vent Kits
(refer to Figure 10.1):
• T he bottom of the combustion air intake pipe must
terminate above the snow line, or at least 12" above the
roof, whichever distance is greater.
• T he bottom of the vent cap must terminate at least 6"
above the top of the combustion air intake cap.
For Horizontal Concentric Vent Kits
(refer to Figure 10.2):
• T he combustion air intake pipe must terminate at least
1" from the wall to prevent water from running down the
wall and into the pipe.
• T he back of the vent cap must terminate at least 14" from
the combustion air intake pipe.
D7. Cut the concentric side vent and combustion air pipes to
the proper length as determined in the previous step. See
Table 11.1 for combustion air and vent pipe sizes. The pipes
must be single wall galvanized or stainless steel material,
except for the last section of vent pipe, which must be one
continuous length of double wall B-vent extended through
the concentric vent box and combustion air inlet pipe on the
concentric side of the box.
D8. Allow the concentric side vent pipe to pass through the
concentric vent adapter box, as shown in Figure 11.1.
Attach the double wall vent pipe to the single wall vent pipe
that goes to the unit. Be sure to seal the joint and the open
area around the double wall vent. Seal all joints and seams
using sealant suitable for temperatures up to 400°F.