SECTION II
3-1-2010
Page 2-9
SYSTEM LIMITATIONS (Continued)
Application of Sidewall Constraints (Continued)
Sidewall Mounted Atomizers
• Distance from opposing wall = 12 ft 6 in. (3.8 m) minimum
to 50 ft (15.25 m) maximum.
• Atomizers shall be mounted on opposite walls with an
equal amount of atomizers on each opposing wall.
Note:
When there is an odd number of atomizers, there
shall be a difference of only one atomizer between
opposing walls.
Example:
For a hazard area requiring five atomizers, one
wall shall have three atomizers and the opposing shall
have two atomizers.
• Maximum horizontal spacing (HS) between centerlines of
discharge = 23 ft (7.0 m).
• Maximum vertical spacing (VS) between centerlines of
discharge = 17 ft (5.2 m).
• The wall spacing (WS) may be between 3 ft (0.9 m) and
8 ft 6 in. (2.6 m) and is measured from the centerline of
discharge of the atomizer closest to the adjacent wall.
• For enclosures where the opposing wall is greater than
33 ft (10 m) away, wall spacing must be observed by
atomizers at both opposing walls. See Figures 9b and 9d.
• When an opposing wall is less than or equal to 33 ft (10 m)
away, atomizers must be staggered so that the minimum
distance between the centerlines of discharge is 3 ft (0.9
m). The atomizers may be staggered vertically or horizon-
tally, or a combination of both. See Figures 9a and 9c.
• When the opposing wall is greater than 33 ft (10 m) away,
atomizers may be pointed directly at each other, or may
be staggered. See Figures 9b and 9d.
• For ceiling heights of 6 ft 8 in. (2.0 m) to 16 ft 5 in. (5.0 m),
the atomizers shall be located at a minimum of 3 ft
(0.9 m) below the ceiling and no further than half the
enclosure height from the ceiling. See Figures 9a and 9b.
• For ceiling heights greater than 16 ft 5 in. (5.0 m), half the
total number of atomizers shall be in the upper half of the
room. Half the total number of the atomizers shall be in
the lower half of the room and will be vertically spaced
between 6 ft 8 in. (2.0 m) and 17 ft (5.2 m) apart. The
atomizers shall be located at a minimum of 3 ft (0.9 m)
below the ceiling and no less than 6 ft 8 in. (2.0 m) above
the floor. See Figures 9c and 9d.
• For ceilings greater than 16 ft 5 in. (5.0 m), wall spacing
requirements shall be observed by the set of atomizers in
the upper half of the room as well as the set of atomizers
in the lower half of the room. See Figures 9c and 9d.
CONTROL OF RUN-OFF
Adequate provisions, corresponding to the nature of the
hazard being protected, need to be made to control or
contain all liquids, including any spilled contaminants, within
the area of the system discharge. For guidance, refer to
NFPA 15 and NFPA 30 or equivalent national or interna-
tional standards.
VENTILATION AND LEAKAGE
All forced ventilation, associated fans, and dampers are to
be shut off and closed upon system actuation.
Concerns:
• Identify any unclosable openings regardless of their size.
• Advise the customer of the possible need to seal these
openings to prevent agent loss.
• Advise the customer of the possible need to provide pres-
sure venting during discharge.
• Determine the route venting will need to take to reach
outside atmosphere.
• Will the venting route involve venting through other enclo-
sures or ducts? If so, provide details about the rooms or
duct routing information.
• If the venting will be through other enclosures, will they be
protected also? If so, will they be protected separately or
simultaneously?
• Will dampers be required for Inlet or Exhaust ducts? If so,
how will they be operated, electrically or pneumatically?
All compartment openings are to be closed using fire rated
closures upon system activation according to FM Approvals
requirements. When not possible to close all compartment
openings, it is at the discretion of the Authority Having
Jurisdiction to allow unclosed openings whose combined
total area does not exceed the maximum tested area. The
system has been tested to a maximum unclosed opening
area of 43 ft
2
(4 m
2
).
General Information
Summary of Contents for ANSUL AQUASONIC
Page 84: ...SECTION V 3 1 2010 Page 5 14 NOTES Installation ...
Page 88: ...SECTION VII 3 1 2010 Page 7 2 Inspection NOTES ...
Page 94: ...SECTION VIII 3 1 2010 Page 8 6 NOTES Maintenance ...
Page 116: ...APPENDIX C 3 1 2010 Page C 2 Main and Reserve Systems NOTES ...
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