Modine HDS Serie Manuel D'installation Et D'entretien 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):
➀ Concentric adapter assembly (same for horizontal and
vertical kits)
➁ Standard Gary Steel 1092 vent termination
➂ Specially designed inlet terminal (part #5H75154B1)
figure 10.1 - vertical Concentric vent Kit
Components
Combustion Air
Inlet Terminal
Concentric
Vent Adapter
Box
4" Combustion Air
for Horizontally vented units (refer to figure 10.2):
➀ Concentric adapter assembly (same for horizontal and
vertical kits)
➁ Special vent termination cap (part #5H75150B1)
➂ Special inlet air guard
figure 10.2 - Horizontal Concentric vent Kit
Components
Concentric
Vent Adapter
Box
Combustion Air
Intake Guard
10
Outlet Vent
Termination Cap
6" Min.
12" Min.*
* Size according
to expected
snow depth.
Building
Roof / Ceiling
4" Exhaust
Outlet Vent
14" Min.
Termination Cap
1" Min.
Building Side Wall
6-584.2
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.
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.
D6. 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. After determining the length of
the field supplied brackets, attach them to the sides of the
box using several corrosion resistant sheet metal screws.
See Figure 10.3 for typical installation and brackets.
figure 10.3 - Adapter Box with outlet vent pipe
Attached
Field Supplied
Mounting Brackets
8.25
"
D7. Determine the length of the vent pipe and combustion
air pipe that must be attached to the vent outlet and
combustion air inlet (on the concentric side) of the adapter
box (refer to Figure 10.3 and 11.1) to extend through the
building wall or roof. Be sure to add the length of the field
supplied brackets (if used) and the thickness of the wall or
roof. Note the following when determining the pipe lengths:
for vertical Concentric vent Kits
(refer to figure 10.1):
• The bottom of the combustion air intake pipe must
terminate above the snow line, or at least 12 inches above
the roof, whichever distance is greater.
• The bottom of the vent cap must terminate at least 6 inches
above the top of the combustion air intake cap.
for Horizontal Concentric vent Kits
(refer to figure 10.2):
• The combustion air intake pipe must terminate at least
1 inch from the wall to prevent water from running down
the wall and into the pipe.
• The back of the vent cap must terminate at least 14 inches
from the combustion air intake pipe.
4" Outlet Vent Pipe
Attached
4"
11.75
"