Ansul INERGEN, Руководство по установке и обслуживанию

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SECTION III
UL EX-4510 7-15-02 Page 3-2
REV. 1
General Information
TYPES OF ACTUATION (Continued)
Pneumatic
Pneumatic actuation utilizes gas pressure from a cartridge
located in a releasing device such as an ANSUL
AUTOMAN II-C release. The gas pressure forces the piston
of the pneumatic actuator down, which in turn forces the
cylinder valve to open, releasing INERGEN agent from the
cylinder, through the piping and out the nozzles.
On a CV-98 valve, a 1/4 in. actuation line is attached to the
1/8 in. port on the side of the valve. Pneumatic pressure,
from an ANSUL AUTOMAN II-C or another pilot cylinder,
opens the valve through this port.
INERGEN FLOW
The flow of INERGEN in the system discharge piping is a
compressible flow. The agent is a compressed gas, the tem-
perature and density of which changes as the pressure in
the pipe decreases. The flow calculation is based on classi-
cal energy conservation considerations. For simple sys-
tems, an assumption of adiabatic expansion of the agent is
sufficient. The ANSUL flow calculation program, however,
accounts for heat transfer from the pipe into the flowing
agent. The consideration of heat input to the agent permits
a greater degree of flexibility in system design.
The ANSUL “INERGEN” system uses an orifice at the out-
let of the storage cylinder manifold to produce a substantial
pressure drop before the INERGEN enters the main distrib-
ution pipe network. The prediction of conditions immediately
after the orifice is based both on classical theory and empir-
ical data taken by ANSUL.
Discharge nozzles control the amount of INERGEN which
flows into various portions of the protected space. The flow
through the discharge nozzles is predicted by classical the-
ory enhanced by empirical data developed by ANSUL.
TYPES OF DETECTION
There are two approved types of detection available for the
INERGEN system: electronic control panel and electric
releasing device.
Electronic Control Panel
Electric actuation of the INERGEN system is obtained
through the use of electronic control systems which monitor
and control various system functions. All detection equip-
ment must be installed according to NFPA 70 and NFPA 72.
Detection devices available are: ionization smoke detectors,
photoelectric smoke detectors, flame detectors, and rate
compensated heat detectors. NOTE: When designing the
system, make certain the type of detector used is appropri-
ate for the type of hazard so proper response is attained in a
fire situation. When a detector senses a fire, a signal is sent
to the control panel. The panel in turn sends an electrical
signal to the solenoid actuator located on the pilot cylinder
valve. The actuator opens the cylinder valve releasing the
INERGEN agent into the manifold. The pressure in the mani-
fold then causes the slave valves to open and discharge
INERGEN into the piping network and out the nozzles.
Electric Releasing Device
The ANSUL AUTOMAN II-C electric releasing device uses
approved thermal detectors and actuates the INERGEN
cylinders pneumatically, utilizing high pressure nitrogen to
operate the cylinder valve.
SYSTEM LIMITATIONS
Design Limitations
• Unbalanced systems (protecting multiple hazards) oper-
ating temperature range: 60° to 80° F (15° to 27 °C)
• Unbalanced systems (protecting single hazards) operat-
ing temperature range: 32° to 130 °F (0° to 543 °C)
• Hazard temperature: –40° to 200 °F (–40° to 93 °C)
• Spare cylinder storage temperature: 0° to 130 °F
(–17° to 54 °C)
• Minimum Design Concentration: 34.2%
• Maximum Design Concentration for 52%
Occupied Spaces:
• Nozzle Linear Coverage: 32 ft. x 32 ft. (9.8 m x 9.8 m)
• Maximum nozzle height above floor level for a single row
of nozzles is 20 ft. (6.1 m). For ceiling heights over 20 ft.
(6.1 m), an additional row of nozzles is required.
• Nozzles to be located a maximum of 12 in. (305 mm)
down from the ceiling, positioned vertically down.
• Manifolding: All cylinders on the same manifold must be
the same size
• Minimum Ceiling Height: 8 in. (20.3 cm)
• Maximum length between node points in the manifold is
20 ft. (6.1 m).
• Maximum length between the final node point in the man-
ifold and the pressure reducer is 100 ft. (30.5 m).