23
8)
Assembly of the Air Intake System and Air Intake Terminals
:
a) Assemble the air intake system using either galvanized or PVC pipe.
b) If PVC piping is used, use PVC cement to assemble the PVC intake system components.
c) If galvanized piping is used, use at least two sheet metal screws per joint. Seal the outside of all joints.
d) The air intake collar will accept a crimped piece of galvanized pipe. Secure with a single #10 sheet metal screw
through the inlet collar and seal the outside of the joint with silicone. If PVC is used for the intake system, use a
short piece of galvanized pipe to connect the PVC to the boiler. Silicone the outside of the joint between the PVC
and galvanized pipe.
e) Horizontal intake terminal is a 90 degree elbow pointing down. Elbow should protrude the same distance from
the wall as the exhaust terminal.
f) Vertical air intake terminal consists of a 180 degree bend (composed of two 90 degree elbows) as shown in
Figure 6.8.
g) Install a rodent screen (not supplied) in the inlet terminal. Use a screen having 1/2” (2 x 2) or larger mesh.
E. Triad Concentric Venting Assembly
WARNING
Failure to follow the instructions could result in flue gas leakage into the combustion air or indoor air,
resulting in unsafe or unreliable operation.
• Do not lubricate concentric gaskets with anything other than water.
• Do not attempt to cut any piping except as permitted in this section. When cutting these sections, make sure
all cuts are square and allow for proper insertion.
• Do not attempt to try to mix this concentric pipe with other venting systems.
1) Before starting assembly of the vent system, make sure that the planned installation is in accordance with the “Vent
System Design” section of this manual and that all required vent components are on hand. These components are
available through Triad distributors.
2) Cutting Straight Pipe
- The following straight pipe sections may be cut:
100/150 Part #
Description
230560
19 1/2” Straight
230562
39” Straight
These sections have a plain male end (without beads - see Figure 6.17a). They are always cut from the male end.
Sections not shown on the above list may not be cut. These sections have beads on the male end (Figure 6.17b).
To cut the straight sections listed above refer to Figure 6.18 and the following instructions:
FIGURE 6.17a: CUTTABLE STRAIGHT SECTION
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