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, - P/115040 System Design Page3A'16 ` 3A.4 Vehicle Paint Spray Booths (VPSB): The Amer6x Vehicle Paint Spray Booth Fire Suppression System isof the pre-engineered typeasdefinedbytheNFPA Standard for Dry Chemical Extinguishing Systems,NFPA 17 and the Standard for Spray Application Using Flammable or Combustible Materials,NFPA33. The extinguishing systems described in this manual are intended to be installed, maintained,and serviced in accordance with NFPA17 and NFPA33' The Annerex Vehicle Paint Spray Booth System has been evaluated by Underwriters Laboratories(UL) in accordance with the specific test protocol found in the UL1254 Standard (Pre-engineered Dry Chemical System Units). Used for painting or coating cars,trucks, buses and large mobile equipment,Vehicle Paint Spray Booths come in a variety of configurations and sizes. The basic volumes of a Vehicle Paint Spray Booth to be protected by the Amerex System consists of three main components. They are: Work Area�-Where the vehicle ispainted. —Exhaust-channbersadUacenttotheVVorhA[aa. Plenums utilize filters to trap oveopray particles that escape from the Work Area. The-primary purpose of the plenum is to expose a sufficiently large area of filter media to the ovespray that|s carried along lna smooth current ofair, -Fan-powered air channels that draw air through the Work Area,the Plenum(s),and finally out through the Duct' 0FPA33 Standard for Spray App lication Using Flammable,and Combustible Materials classifies the interior sections nf paint spray booths,and certain areas adjacent to booth openings,as Class' orcJass-1LDivison'1 or Divisioin-2 locations. Electrical components mfonindustrial Dry Chemical System,Such asthemmostatslocated within these areas shall be rated for use ln classified areas,endal|mddngto1hesemonnponentsshaOconformniptheprovisionsof NPP&7Q,National Electrical Code,for Class—1mrCXass-1,Dhvisipn-1or0]vYsion'2 locations. Any industrial System Control Head with amoicrpsm/itcbis not suitable for use ina classified area. Most of the time,the air isdrawn downward over the vehicle during the painting process(as\n eitheran Under Floor, Pit,or Down Draft/Side-Exhaust\cnnMguration). Other booths,such asa Back Draft orPant-le8(Hooeshoe)design, draw air down and across,toward the rear of the booth. Fresh air|s usually drawn in through intake filters either in the Work Area telling or on the upper walls of the Work Area. Many installations ub|izea Heated Make-Up / Recirculation option,which re-circulates filtered,heated air through_the bo oth,thereby b ei-fig more energy efficient. The Anlerex Vehicle Paint Spray Booth System requires that the booth exhaust fan(s) be shut doyvnpriortothe discharge the ABC drychemicaL This is accomplished with the use of the Mechanical Time Delay(P/0 15765) with mechanically-released systems,or by the use of the Amerex Electric Control Panel (P/N 15780)with the use of the timed.discharge c|rcuh. |tis the responsibility of the installer to prupedy}deotifvthe con-figuration of,the booth-and to follow the requirements of this manual in order to achieve proper fire suppression. Sometimes,additional turns, baffles,or obstructions in the booth's plenum and duct may dictate the use of additionalnozzles in order to.ensure good distribution of dry chemical. P/0: TF 16172 Standard Work Area; 8ackdraft/Pande8/Underfloor Plenum 3-Way 16174 pit wf Tunnel(ceoteprnount);Downdraft Plenum with or without Vertical Transition(center- mount) D/P 16190 Exhaust Duct; Pit Plenum (end-position) ' TFP 17809 Module Perimeter Work Area Coverage,ONLY ' Cylinders: and IS 35 models are used for Duct and Plenum coverage, using either the DP,TF,or 3-Waynozdes.The |S45nnode| must use two or fourTF nozzles (P/N16172) under Standard Work Area Coverage. The|S45 model uses one ortwo TFP nozzles/p/Nl78O9\ under Module Perimeter Work Area Coverage. ULE%5ZD8 April 9,2D13