28
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
SECTION G - TERMINATION, STARTING
ADAPTERS, DRAINING SECTIONS, RELIEF
VALVE AND ACCESSORIES
TERMINATION - GENERAL
An upward discharge (such as with a Finishing Cone
(FC)
or open top) provides the
most effective means of dispersing chimney gases into the atmosphere and away from
immediate surroundings. Such termination however will allow entry of rain unless there
is upward flow at high velocity. A Rain Cap
(RC)
is only partially effective in excluding
rain. Its effectiveness depends on chimney gas flow rate, raindrop characteristics
and wind velocity. For diesel or turbine exhaust, a Flip Top
(FT)
can be use for vertical
chimney and the Miter Cut
(MC)
for horizontal discharge. For a termination with a very
low flow resistance loss, but maximum protection from rain, a No Loss Cap
(NLC)
can
be used on vertical run. If an Outer Band
(BSE)
or a Closure Ring
(CR)
. is used with the
termination, it must be sealed to the section with outer sealant S-375.
FINISHING CONE (FC)
The Finishing Cone
(FC)
is a single wall construction (for Model DCL) or a Double wall
construction (for Models DAS PRO or DIS PRO), where the inner wall is straight, but the
outer wall is a cone.It attaches with a standard Inner V-Band
(BSI)
and Outer Band
(BSE)
for Models DIS PRO and DAS PRO (See
JOINT ASSEMBLY Section
) to the uppermost
chimney pipe section. To prevent rain from reaching an appliance this installation
requires use of a Drain Length
(DL)
in a vertical run or a Drain Tee Cap
(DTC)
at the
end of a vertical chimney. See
Figure 67
.
Figure 67- Exit Cone (EC) installed
RAIN CAP (RC) OR RAIN CAP WITH BIRD SCREEN (CRCB)
The Rain Cap combine partial protection against rain entry with low exit flow resistance
(resistance is roughly 0.5 velocity heads). It is mounted to the end of a standard pipe
section by use of the standard Inner V-Band
(BSI)
. See Step 1 to 4 in the
JOINT
ASSEMBLY Section
. It is a single wall assembly (for all Models DCL, DAS PRO and DIS
PRO), but a Closure Ring
(CR)
is provided as part of the Rain Cap so that the insulating
space is protected through the upper end of the chimney. The CR must be seal to the
inner wall with outer Sealant
S-375
. See
Figure 68
.
Figure 68 - Rain Cap (RC) installed
FLIP TOP (FT)
Used in vertical diesel or turbine exhaust, it prevents moisture and debris from entering
the system. It opens with internal pressure and closes when no pressure. It is a single
wall part (for all Models DCL, DAS PRO and DIS PRO), that is attached on
the uppermost chimney pipe section with a inner V-Band
(BSI)
(See
Step 1 to 4 in
the JOINT ASSEMBLY Section
). For the
DAS PRO / DIS PRO, a Closure Ring
(CR)
is
provided to protects the insulated space between standard pipe inner and outer. If a
FT is installed on a horizontal termination, the hinged side of the top must be oriented
at the top of the pipe keeping the counterweight up. The CR must be seal to the inner
wall with outer Sealant S-375. See
Figure 69
Figure 69 - Flip Top (FT) installed
MITER CUT (MC)
The Miter Cut a double wall construction and is intended for use as a termination for
a horizontal engine exhaust. It is designed to minimize the entry of rainwater when
installed in the proper orientation. It is equipped with a birdscreen at the end of the
Miter Cut. The
MC
must be installed so that the long side of miter is on the top of the
pipe to afford protection from rain. See
Figure 70
.
Figure 70 - Miter Cut (MC) installed
NO LOSS CAP (NLC)
The No Loss Cap is a “low loss” termination and is recommended by the
American
Conference of Government Industrial Hygienists (ACGIH): Industrial Ventilation
Manual, 23rd Edition
,
Figure 5-30
. Only as a vertical cap, it is designed to eliminate
back-pressure on positive-pressure exhausting equipment while still protecting the
equipment from the rain. This allows your equipment to operate as efficiently as
possible and also allows the exhaust to blast unhindered straight up with full velocity.
The last 6” of the inner flue is surrounded
by a larger outer wall (I.D +2”) that has a
height of 4 times the flue diameter and is
open at the bottom. The Closure Ring
(CR)
must be seal to the inner wall with outer
Sealant
S-375
. Rain water that falls into
the larger wall washes down the side of
the larger chimney and discharges at the
bottom. See
Figure 71a
.
For I.D. from 5” to 13”, the No Loss Cap
is an integral component that attaches to
the chimney flue using a standard inner
V-Band
(BSI)
(See
JOINT ASSEMBLY
Section
). For the DAS PRO / DIS PRO , a
Closure Ring
(CR)
is provided to protects
the insulated space between standard pipe
inner and outer. See
Figure 71a
Figure 71a - No Loss Cap (NLC) installed or I.D. from 5” to 13”
