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The fire sprinkler system shall be of the cycling single interlocked preaction design. The system shall be designed to limit the damage, which may be caused by excessive water flow. The system shall be completely automatic and be designed for on/off operation. The method of detection shall be an approved fixed temperature, self restoring heat detector with a drop-off tab indicating the detector had been exposed to a temperature of 800°F and requires replacement. On/off operation shall cycle when heat detector senses heat regeneration; when detector cools and restores, system operation shall cease. Water flow shall be controlled through a 90° pattern, spring aided flow control valve. Once system has operated, a strobe and alarm shall be activated at the control panel. Strobe and alarm will not deactivate until system is manually reset to normal operation. The system release control panel shall be equipped with the capability for a discharge time from 30 seconds to 15 minutes after the detector circuit has returned to no fire or no heat present condition.

System shall operate as a preaction system as outlined in NFPA 13, Standard for the Installation of Sprinkler Systems. Flow control valve trim shall be equipped with a hydraulically latching pressure operated relief valve (PORV) to ensure system will fail open or "fail safe", if system were to lose power during operation.

The system shall incorporate a restricted regulated air supply to supervise the integrity of system piping network. Supervisory air shall be maintained at 30 PSI. A pneumatic actuator between the air supply and the system piping shall be utilized for "fail safe" operation of the system.

Cycling single interlocked preaction system shall be equipped with an A/C powered release control panel with a 90-hour battery backup power supply. The release control panel shall annunciate a trouble piezo alarm for the following conditions: low system air supply, detector zone disabled, power supply absent, low battery supply, inadequate field wiring.

System riser shall be equipped with a rubber seated check valve with gauge connections and a system main drain connection. Check valve shall have a removable access plate for periodic inspection as per NFPA 25, Standard for the Inspection, Testing and Maintenance of Water-Based Fire Protection Systems.

Cycling single interlocked preaction system shall be a listed system with all system componentsl isted for use in the system. The cycling single interlocked preaction system shall be manufactured by The Viking Corporation. Cycling single interlocked preaction system shall be a Firecycle lll-OH Single Interlocked Preaction System. System shall be UL listed and Factory Mutual approved, and installed according to the manufacturer's installation guidelines.

SYSTEM DEVICES

Firecycle® IIl-OH Release Control Panel
The control panel shall incorporate the necessary relays, timer, and alarm and trouble connections essential to the operation of a Firecycle IIl-OH system. The release control panel shall be housed in a UL listed and Factory Mutual approved enclosure. The release control panel shall be equipped with 2 detection circuits - 1 detection circuit for normally open detectors and 1 detection circuit for normally close detectors. The release control panel shall accommodate a back-up power supply. The release control panel shall be a Viking Model E-1 Firecycle IIl-OH Release Control Panel.

Firecycle® lll-OH Preaction System Trim
The valve trim shall be UL listed for service in the Firecycle lll-OH cycling preaction system trim. Cycling preaction system trim shall incorporate the following as stock options when ordering (but not limited to); 1 normally open electric solenoid, 1 normally closed solenoid, 1 water flow alarm pressure switch, 1 pressure operated relief valve, 1 pneumatic actuator, 1 supervisory air pressure switch, 1 alarm shut-off valve, 1 alarm test valve, 1 priming connection, 1 ported riser check valve, 1 flow test valve, 1 manual emergency release, 1 priming chamber water pressure gauge and three-way valve, and 1 water supply pressure gauge and three-way valve.

Firecycle® lll-OH Detector
The heat sensitive normally closed detectors utilized in the detection system of the Firecycle lll-OH cycling system shall be fixed temperature, rate-compensating detectors listed for use on the Firecycle lll-OH cycling system. The detector shall incorporate a wax heat activated exposure strip, which will discolor at 300 degrees Fahrenheit indicating possible detector damage. The heat probe utilized in the heat detector shall be constructed of stainless steel. The resistance drop across the detector in a closed position shall be 0.03 Ohms. The conduit box shall be a 4" Octagonal outlet box. The detector utilized in Firecycle lll-OH cycling system shall utilize Viking Model C Firecycle-OH detector.

Firecycle® lll-OH Detector Cable
The cable used with the Firecycle III-OH system shall be listed power limited fire alarm cable (FPL). The cable shall be listed for a two-hour fire rating when installed in ½" or larger EMT (or conduit). The cable shall meet the 1999 National Fire Alarm Code for survivability and be UL listed as a NEC type FPL Fire Alarm Cable.

Discharge Devices
(Insert applicable product specification)

Detection System
The electrical devices utilized in the supplemental detection system shall be compatible with the water control valve release control panel. Installation of electrical supplemental detection system shall be in accordance with NFPA 70, NFPA 72 and local installation requirements. An accessible detector shall be placed for annual testing of deluge system.

System Piping
The system piping shall conform to NFPA 13, Standard for the Installation of Sprinkler Systems. The system piping shall be listed for the maximum system pressure it is to be exposed to. All system piping shall be metallic and shall be protected against corrosion if corrosive conditions exist.

Hangers
The preaction sprinkler system hangers shall conform to NFPA 13, Standard for the Installation of Sprinkler Systems. System piping shall be substantially supported to prevent sway or thrust. The hanging of non-system components from the sprinkler piping shall be strictly prohibited. The use of non-metallic hanger materials shall be prohibited unless expressed otherwise.

Fittings
The pipe fittings installed on the preaction sprinkler system shall be in conformance with NFPA 13, Standard for the Installation of Sprinkler Systems. The fittings shall be listed for use at the system pressures to be encountered. The fittings shall be corrosion resistant if they are to be installed in a corrosive atmosphere.

Flow Control Valve
Sprinkler systems requiring a means of automatic or remote manual opening or closing of the water supply shall utilize a flow control valve with a spring aided clapper. The flow control valve shall be so constructed that the force of the spring and the differential of the valve clapper to water seat will close valve if detection or release system is reset. The valve trim shall be compatible and listed for valve. The flow control valve shall be UL listed and Factory Mutual approved. The Flow Control Valve manufacturer to be The Viking Corporation. Valve to be Viking Model H-1.

Fire Department Connection
A system fire department connection shall be provided on the system riser in accordance with NFPA 13, Standard for Installation of Sprinkler Systems. The fire department connection shall be of a brass body with an integral clapper assembly to separate flow between inlets. The fire department connection shall be installed in an area accessible for the first response unit. The fire department connection shall be UL listed and Factory Mutual approved for fire protection use.

System Control Valve
The preaction system control valve shall be a listed indicating type valve. The control valve shall be UL listed and Factory Mutual approved for fire protection installations. The system control valve shall be rated for normal system pressure but in no case less than 175 PSI.

System Check Valve
Check valves utilized in the sprinkler system riser shall be UL listed and Factory Mutual approved for use on fire protection systems. The sprinkler riser check valves shall be manufactured with supply side and system side gauge connections and a main drain outlet in conformance with NFPA 13, Standard for Installation of Sprinkler Systems. The check valves shall be constructed of a ductile iron body with a brass seat and a rubber faced clapper assembly hinged to a removable access cover. The check valves shall be equipped with a removable access cover for periodic inspection as required in NFPA 25, Standard for the Inspection, Testing and Maintenance of Water-Based Fire Protection Systems. The check valves shall have a working water pressure of 250 PSI. The Check Valve manufacturer to be The Viking Corporation. Valve Model to be F-1 Easy Riser Check Valve.

Compressed Air Supply
An air supply capable of restoring system pressure within 30 minutes shall be provided. Acceptable air supply arrangements are:

1. An owner-supplied air system with an air maintenance device on the supply side of the air supply inlet.

2. A tank-mounted air compressor with an air maintenance device between the air compressor and the air supply inlet on the system riser.

3. A riser-mounted air compressor feeding an air reservoir. An air maintenance device shall be placed between the air reservoir and the system riser.

Water Motor Alarm
Water flow will activate a hydraulic powered water motor alarm by way of integral valve alarm line trim piping. The water motor gong shall be connected to a water pressure retarding chamber to limit the propensity of unnecessary alarms. The water motor alarm shall be equipped with a rear closure plate to limit the access of foreign materials and accumulation of debris. The water motor alarm shall be UL listed and Factory Mutual approved for the application in which it is used. The Water Motor Alarm manufacturer to be The Viking Corporation. The Water Motor Alarm to be Viking Model F-2/G-2.

Foam Products
Concentrate Control Valve
Concentrates
Bladder Tank
Proportioners
Discharge Devices