13
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
5. Tighten all the bolts of the containing ring. For each bolt, use the supplied
tool as a guide between the two containing rings. See
Figure 18
.
Wrench
(by others)
Tool Supplied
Figure 18 - Step 5 of the Adjustable Length
6. Install the outer pipe casing insulation (and insulation strip if
Model DISPRO
)
so the side with the bracket goes on the upstream section. See
Figure 19
.
NOTE
: The outer wall must fit loosely and slide freely when the duct expands
or contracts.
NOTE
: If the outer casing is too long, it may be cut to length by respecting the
minimum overlap of 1” with the outer wall of the inlet end section.
VARIABLE LENGTH (LV): For Positive Pressure System and
Odd lengths
The Variable Length (
LV
) has one major function. It makes up odd lengths of
duct. It must not be used for expansion compensation.
NOTE:
For high positive pressure application, such as on diesel generator exhaust, it is
allowed on the outside of the building only.
It is shipped with a flanged retaining band assembly on the inner sliding wall.
See
Figure 20
.
Figure 19 - Installation of Adjustable Length Step 6
Gas Flow
Half Outer
Retaining Band
Cuttable Half
Outer Casing
Adjustable Flanged
Retaining Band
Cuttable Sliding
Inner Wall
Figure 20 - Variable Length
The whole
LV
assembly includes:
See
Figure 21
for details.
• A sliding inner wall that fit closely inside a standard pipe section and it is flanged on
one side.
• An adjustable flanged retaining band, composed of;
◦
Double flanged sleeve
◦
Retaining flanged collar
◦
An inner V-Band
(BSI)
• Insulation band
(DIS PRO)
• Split outer casing
(DIS PRO/DAS PRO)
NOTE:
Sealant must be ordered separately. See
SEALANT USAGE in SECTION C
.
Retaining
Flanged Collar
Inner V-Band
(BSI)
Double Flanged
Sleeve
Half Outer
Wall
Figure 21 - Detail of Variable Length
