3003 W CASINO RD BLDG 40-36 2025-03-25

Page 3 of 4 N I IQ W4, 1k I ' WATER MOTOR ALARMS The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058 Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com Visit the Viking website for the latest edition of this technical data page www.vikinggroupinc.com. 5. OPERATION (See Figure 3) When a sprinkler system is activated, water flows from the alarm outlet of the valve, through the 3/4" (20 mm) strainer and alarm line piping, into the inlet of the water motor. From the 1/8" inlet orifice, the water flows through a nozzle (4), which restricts the flow into a pressurized stream directed onto the impeller (7). Force from the water stream turns the impeller and drive shaft (10), causing the striker arm (20) to rotate. The striker (25) impacts against the gong (16), producing a continuous alarm. A minimum of 5 PSI (.34 bar) is required at the nozzle to cause a continuous alarm. When properly installed, the Water Motor Alarm produces the required 90 decibel output. After passing through the water motor, the water is discharged through a 1" (25 mm) drain outlet in the bottom of the impeller housing. The discharged water must be piped through the wall to atmosphere or to a suitable open drain. 6. INSPECTIONS, TESTS AND MAINTENANCE Weather -resistant materials are used in the construction of the water motor alarm. At regular intervals, examine and test the water motor to ensure that the nozzle and drain line are clean and free of obstruction, and that the alarm functions properly. Also, at regular intervals and before disassembly of the water motor, clean and inspect the alarm line strainer located at the alarm outlet of the water - flow detecting device, or the outlet of the retard chamber, if used. (Note: Some retard chambers may be equipped with a strainer built in). For minimum maintenance and inspection requirements, refer to NFPA 25. In addition, the Authority Having Jurisdiction may have additional maintenance, testing, and inspection requirements that must be followed. Before proceeding with disassembly of the water motor alarm, notify the Authority Having Jurisdiction and occupants of the area covered by the system affected. Take all appropriate precautions. The water motor alarm will be disabled during disassembly. A. Water Motor Disassembly (See Figure 3) 1. Isolate the water motor alarm by closing the alarm line valve in the trim of the waterflow detecting device. (Refer to appropri- ate technical data for the system used.) 2. Remove pipe plug (5). 3. Remove all round head machine screws (1) from the water motor cover. 4. Separate the cover (2) and the gasket (6) from the housing (3). 5. Remove the impeller (7). 6. Inspect and, if necessary, carefully clean the nozzle (4) with a wire or pipe cleaner brush. 7. Flush the nozzle way and drain line with water or compressed air. B. Water Motor Re -Assembly 1. Re -install the pipe plug (5). 2. Re -install the impeller (7). 3. Replace cover gasket (6) and attach cover (2) by using round head machine screws (1). 4. Open the alarm line valve. 5. Test the water motor alarm. 6. When test is complete and water motor alarm operation is satisfactory, place the alarm line valve in the proper "alarm" posi- tion. Reset and return the affected systems to service. 7. AVAILABILITY The Viking Water Motor Alarm is available through a network of domestic and international distributors. See the Viking Corp. Web site for closest distributor or contact The Viking Corporation. 8. GUARANTEES For details of warranty, refer to Viking's current list price schedule or contact Viking directly. Form No. F_082789 19.04.15 Rev 19.1