TAPERED INCREASER
TAPERED
PITCH 1/4" PER RUNNING FOOT
UPWARD TOWARD CHIMNEY
C
H
I
M
N
E
Y
C
H
I
M
N
E
Y
FULL SIZE
PITCH 1/4" PER RUNNING FOOT
UPWARD TOWARD CHIMNEY
PREFERRED
DOUBLE "Y" FITTING
"Y" FITTING
45 ELBOW
0
ACCEPTABLE
CHIMNEY
BREECHING
RUN
BREECHING
RUN
STEP 4: BREECHING RUNS
14
FIG. 4.8
FIG. 4.9
1. Breeching can be full size for an entire bank of boilers
(Figure 4.8 left) or may be tapered (Figure 4.9 right).
using one tapered division within a bank of eight mod-
ules.
2. For tapered breeching, the smallest sized breeching
division is always the furthest from the chimney with
transition to the larger division leading toward the chim-
ney (see Figure 4.9 right). All increaser fittings must be
tapered to assure proper flue gas flow.
3. Remember, for rectangular breeching, the larger di-
mension of the rectangle must be in the vertical position,
4. ALL BREECHING RUNS MUST BE PITCHED 1/4”
PER FOOT OF LENGTH UPWARDS TOWARD THE
CHIMNEY.
5. Where one breeching run connects into another
breeching run, they must be connected so the flow-
streams from each breeching run do not face or oppose
each other. They must flow in the same general direction
(see Figure 4.10). Construction involves using “Y”-fittings
and rounded 45° elbows angled towards the chimney to
assure proper flue gas flow, specifically “Y” together
rather than “tee” together.
FIGURE 4.10
FIGURE 4.11
6. Where two or more breeching runs connect into the
same chimney, make sure the openings into the chimney
do not directly face or oppose each other.
7. At the breeching-chimney connection, breeching must
be flush with the inside of the chimney liner and sealed.
8. Always use “Y” fittings rather than “tee” fittings when
connecting breeching together.
Содержание MultiTemp MR Series
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