State Water Heaters 301 Series Instruction Manual page 32

MULTIPLE CONCENTRIC TERMINATION CLEARANCES
When installing multiple concentric terminations vertically through
a roof or horizontally through a sidewall ensure the required
clearances (separation) between terminations are maintained.
Ensure multiple terminations are arranged or grouped as required.
Note: These clearances must be maintained to prevent the
recirculation of vent (exhaust) gases to the intake air.
Clearances are measured between the edges of the
concentric termination caps.
When installing multiple concentric terminations through a roof
or through a sidewall the clearances shown in
maintained.
See
Multiple Concentric Termination Arrangements
Close Proximity & Standard Clearance
1. The clearance between multiple termination caps must be zero
inches (touching) to a maximum of two inches (5 cm), dimension
A - , when installing concentric terminations in close
Figure 31
proximity. See (page 33).
Figure 36
2. The clearance between multiple termination caps must be
increased to a minimum of 24 inches (61 cm), dimension B
- , when installation in close proximity (above) is not
Figure 31
possible. This is the standard clearance.
CONCENTRIC
TERMINATION CAPS
A
END VIEW
OR
CLOSE PROXIMITY
A = 0 - 2 INCHES (0 - 5 cm)
TWO CONCENTRIC TERMINATIONS
Figure 31. Two Concentric Terminations
(THROUGH A ROOF OR SIDEWALL
- Through a Roof or Sidewall
Three Concentric Terminations
1. When installing three concentric terminations through a roof or
through a sidewall the third termination may be installed in close
proximity as indicated by dimension A in
2. If close proximity installation of the third termination is not
possible the third termination may be installed as indicated by
dimension B in .
Figure 32
A
CONCENTRIC
TERMINATION
CAPS END VIEW
A
A = 0 - 2 INCHES (0 - 5 cm)
CLOSE PROXIMITY
Figure 32. Three Concentric Terminations
THREE CONCENTRIC TERMINATIONS
-Through a Roof or Sidewall
(THROUGH A ROOF OR SIDEWALL
must be
Figure 31
(page 33).
B
STANDARD CLEARANCE
B = 24 INCHES (61 cm)
OR GREATER
)
.
Figure 32
B
THIRD
TERMINATION
B = 24 INCHES (61 cm)
OR GREATER
)
Four Concentric Terminations
1. When installing four concentric terminations through a roof or
through a sidewall in close proximity they may be arranged into
stacked rows of two as shown in
rows of two as shown in
2. Four is the maximum number of concentric terminations that
may be installed in a group where all terminations are in close
proximity as shown in
Figure 33
A
A = 0 - 2 INCHES (0 - 5 cm)
CLOSE PROXIMITY
FOUR CONCENTRIC TERMINATIONS
Figure 33. Four Concentric Terminations
(THROUGH A ROOF OR SIDEWALL
- Through a Roof or Sidewall
A
CAPS END VIEW
A = 0 - 2 INCHES (0 - 5 cm)
CLOSE PROXIMITY
FOUR CONCENTRIC TERMINATIONS
Figure 34. Four Concentric Terminations
(THROUGH A ROOF OR SIDEWALL
- Through a Roof or Sidewall
Groups Of Terminations
1. When installing multiple groups of concentric terminations
through a roof or through a sidewall in close proximity, they
can be installed into stacked groups of four as shown in
. Lateral groups of four as shown in
35
more convenient installation arrangement for multiple groups
depending on available space.
A
A
A = 0 - 2 INCHES (0 - 5 cm)
CLOSE PROXIMITY
EIGHT CONCENTRIC TERMINATIONS
Figure 35. Eight Concentric Terminations
(THROUGH A ROOF OR SIDEWALL
- Through a Roof or Sidewall
32
(page 32) or lateral
Figure 33
(page 32).
Figure 34
.
A
CONCENTRIC
TERMINATION
CAPS END VIEW
)
B
A
CONCENTRIC
TERMINATION
B = 24 INCHES (61 cm)
OR GREATER
)
may be a
Figure 34
CONCENTRIC
B
TERMINATION
CAPS END VIEW
B = 24 INCHES (61 cm)
OR GREATER BETWEEN
GROUPS OF FOUR
)
Figure