Rapid Engineering CTHN-100, Руководство по установке и эксплуатации

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SECTION 9: M
ULTIBURNER
H
EATER
I
NSTALLATION
35 of 91
9.4 Radiant Tube Length
The radiant t u be length fixed for each b u rner is
sho w n on Page 34, Table 10 .
9.5 Manifold Tube
Any t u be beyond the radiant t u be length is
considered manifold. Manifold t u be can be u sed to
lengthen t u be r u ns beyond the radiant t u be length; to
connect m u ltiple r u ns of t u bing and connect the
system to the p u mp. Minimum and maximum
manifold tube lengths are shown on Page 34,
Table 10 . The table must be used in conjunction
with the additional rules for the diameter and
length of manifold in a system, as described
on
Page 35, Section 9.5.1 through Page 39, Section
9.6.3 .
9.5.1 Manifold Diameter
1. Manifold diameter for systems containing less
than 320,000 Bt u /h inp u t can be 4" (10 cm) or
6" (15 cm).
2. Manifold diameter for systems containing
320,000 Bt u /h inp u t and greater m u st be 6"
(15 cm).
Exception: If total manifold t u be length is 70'
(21 m) or less, 4" (10 cm) diameter manifold
t
u be can be u sed for systems u p to
800,000 Bt u /h.
9.6 Multiburner System Layouts and Manifold
Tube Length Rules
Most CTHN m u ltib u rner layo u ts can be classified as
one of the follo w ing five layo u t types:
Flag, Modified In-Series, T, Fork or Herringbone.
Please refer to
Page 35, Section 9.6.1 through Page
39, Section 9.6.3 for explanation of manifold r u les
and basic diagrams of each layo u t type. The
diagrams sho w very simple examples of each layo u t
type. Act u al layo u ts w ill vary in total n u mber of
b u rners in the system as w ell as the overall shape of
the system. Additional pieces s u ch as elbo w s may
change the overall layo u t appearance b u t are u s u ally
considered a variant of one of the five m u ltib u rner
layo u t types.
9.6.1 Flag and Modified In-Series Layouts and
Manifold Tube Length Rules
See Page 36, Figure 21 through Page 36, Figure 22
for diagrams of Flag and Modified In-Series layo u ts.
Minim u m and maxim u m manifold t u be length applies
to all t u bing bet w een the end of a radiant t u be r u n
and a tee or cross; all t u bing bet w een any tees and/
or crosses; and all t u bing bet w een the last tee or
cross and the p u mp. See Page 34, Table 10 .
Example: Consider a Flag or Modified In-Series
layo
u t w ith five CTHN-100 b u rners. Page 34, Table 10
sho w s a minim u m of 6' (2 m) and a maxim u m of 45'
(13.5 m) of manifold t u be req u ired per b u rner.
Therefore the entire five-b u rner system m u st have
bet w een 30' (10 m) and 225' (69 m) of manifold
t u bing. The manifold t u bing is in addition to the 40'
(12 m) of radiant t u be per b u rner. Radiant t u be may
end at a tee, or r u ns may be lengthened by adding
some manifold t u be bet w een the end of the radiant
t u be and a tee. Each b u rner in the system (except for
the b u rner f u rthest from the p u mp) m u st u se a
damper co u pling to properly adj u st the vac uu m at
each b u rner. The damper co u pling may be placed
any w here bet w een the end of the radiant pipe and
the tee.