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• TFP370 Page 11 of 12 Releasing Panel Model ORS Electronic Accelerator(Ref. It is highly recommended that imple- 11110 Potter Electric Series Table D,Nominal Pressure column). mentation of the design features be PFC-4410-RC Releasing Panel utilizes During the system set-up acceptance performed through the coordination of a NEMA Type 1 enclosure(i.e.,general the architect/engineer,owner,authority purpose enclosure). Therefore the tests, a calibrated pressure gauge having jurisdiction, mechanical panel must be located where it will not should be used to set the system air designer,and fire protection designer. be subject to direct or indirect wetting pressure that had been entered into the (e.g.,condensation). Program. FDT-Q Fluid Delivery Calculation An engineering evaluation should be Progr After the proper air pressure performed based upon the specific Fire Detection has been established, use the call- penthouse and storage arrangement For preaction systems,135°F(57°C)or brated gauge to determine the standard to determine the preferred method of 155°F(68*C) rated LHD wire must be air pressure gauge deviation(d any)and protection including consideration of installed. note the calibration deviation between the following: the calibrated gauge and the standard • quantity and class of material stored The LHD may be run along the branch- lines or perpendicular to the branch- gauge for future reference. below penthouse lines.The following requirements shall Mechanical System Shut-Down • area of openings between storage apply when installing LHD. The fire detection system must be space and penthouse If along branchlines: designed to shut fans down in powered range• arrangement of air distribution ventilation systems or to close dampers • duct-work • on branchline piping in natural ventilation systems upon • along branchlines (i.e., parallel to actuation.The system is to be designed To ensure the proper operation of the but not directly attached to branch- to shut down fans to avert delayed fire sprinkler system in this area,the lines)provided LHD is no further than operation of the first sprinklers. following design features should be 12 inches (305 mm) laterally from A separately ordered Auxiliary Relay included whenever possible: branchlines Module Potter MR-201/C for the Potter • Minimize openings between the If perpendicular to branchlines: Electric Series PFC-4410-RC Releasing storage space and the penthouse Panel must be utilized to perform this to the minimum area necessary to • LHD must be spaced no further function. pro-vide makeup air for the chillers. than maximum spacing between AuxiliaryRelayModules are available branchlines • Minimize total penthouse volume. for mounting either inside or outside • LHD must cross within 12 inches(305 of the Series PFC-4410-RC Releasing • Install sub-ceiling beneath open mm)laterally of sprinklers Panel. For QUELL Systems, only use areas with Ultra K17 Sprinklers �, The fire detection zone must match the externally located Auxiliary Relay installed below.Sub-ceiling should the sprinkler system area.Overlapping Module to avoid electrical interfer- be provided in accordance with FM pac g ence with the wiring connections to Sheet gApprovals' Loss Prevention Data of the fire detection zone to adjacent Sheet 2-0,Paragraph 2.2.1.8(a). sprinkler system areas is not permitted. the Model ORS Electronic Accelerator. Using an externally located Auxiliary • Install draft curtains around the All other LHD manufacturers installation Relay Module will also maximize on perimeter of the penthouse open- instructions and hanging methods must battery space within the PFC-4410-RC. ings. be followed. Fire Pump Start-Up • Eliminate storage beneath mechan- Fire Detection Circuit To ensure that the lull hydraulic ical penthouses. The fire detection circuit illustrated in capacity is available for system filling, Figure 2 is shown as Class B. Class A fire pump start-up is recommended to Operation detection circuit may be utilized when be initiated upon actuation of the fire installed per Potter Manual 85403550, detection system. Double Interlock Preaction System Rev L or greater,describing the Potter A separately ordered Auxiliary Relay When the system is set for service, Electric Secriesies PFC-4410-RC Releasing Module Potter MR-201/C for the Potter the system piping is pressurized with Panel. Electric Series PFC-4410-RC Releasing a dry source of air, and the releasing Battery Back-Up Panel must be utilized to perform this panel is in a normal standby condition. TFPP recommends a minimum of 90 function. In the event of a fire,the fire detection hours of battery backup for the QUELL Auxiliary Relay Modules are available will respond(15�F(fib maximum)to design methodology. To achieve this initiate Zoned of the releasing panel.As with the Potter PFC4410 RC panel,18 for mounting either inside or outside the fire continues to grow,the opening with hear batteries are provided with of the Series PFC-4410-RC Releasing of one or more Ultra K17 sprinklers amp the panel package. If the AHJ and/or Panel. For QUELL Systems, only use (266°F(141°C))will begin to relieve air end user will accept less than 90 hours the externally located Auxiliary Relay pressurerefrom the system piping. The Module to avoid electrical interior- Model ORS Electronic Accelerator will of battery backup (e.g., 24 hours), ante with the wiring connections to respond to an air decayrate of at least other batteries may be ordered. In all the Model ORS Electronic Accelerator. p cases, battery calculations must be 0.10 es2soc releasing07 bar/sec)p to initiate. performed.A Battery Calculation form Using a Moduleeuernally located Auxilianry Zone 2 of and the i , panel. With Relay awithini also maximize C. Zones will r initiated, the releasing circuit can be accessed on the Potter web site battery space the PFC-A410-RC. panel energize the circus at: hit //www. ottersi nal.com/fire/ Penthouse to the solenoid valve in the DV-5 Deluge batt ger toolsP h Penthouse configurations vary consid- Valve trim.Opening the solenoid valve y p p erably,and as such there is no universal trips the DV-5 allowing water to enter Automatic Air Supply solution for providing protection the system piping and flow to the The normal system air pressure can beneath these areas. activated sprinkler(s). be at any pressure compatible to the