Water Motor Gong Vs Electric Bell

The requirement is that if not part of an alarm system it must be installed per nfpa 70 article 760 instead of nfpa 72.

Water motor gong vs electric bell. Listed electric gongs bells horns or sirens inside the building or a combination of such used inside and out are sometimes advisable. They are designed to sound a continuous alarm while a sprinkler system operates. Give me a central station monitored sprinkler system. The water motor gong is a large wall mounted.

The image below shows the internal mechanism of an electric bell. 2 the detecting devices must trigger the alarm signal independently of the flow pressure switches in the system valve. Water motor gong bell. The model wma 1 water motor alarm is a re designation for the central model f 2 gem model f630 and star model s450.

In my experience water gongs can barely be heard at 20 feet distance. It is light weight and durable. An alarm is a required component of every sprinkler system having more than 20 sprinklers. 3 the flow pressure switch is still required.

If they do not have a central station alarm they pay more premium and depending on the type of occupancy we. Any design issues or concerns with existing installation errors c. Content provided will be based on nfpa 25 unless specified specifically in the video. I can tell you from an insurance point of view we place little value to the local bell on the outside of the building.

The polymer drive bearings do not require lubrication and the gong is closely fitted to the gong mount to eliminate the need for a sepa rate cover. The gong gong mount and water motor housing are fabricated from corrosion resistant aluminum alloys. In case of fire sprinkler systems the alarm gong can be installed on a wall with the motor inside the building and the gong outside for maximum audibility. In these system risers fire alarm bells activate electronically after a physical trigger.

The electric circuit is completed by. Straight risers use a standard check valve instead of an alarm valve. The viking water motor alarms are mechanical devices actuated by a flow of water. An electric source for example a battery can be used to power the electromagnet used in an electric bell.

1 i wouldn t bother with an alarm gong instead i would install an electric bell. Not many how many water motor gongs do not work because of bees or a bird and or lack of maintenance a lot. Unlike electric bells a water motor gong relies only on the force of moving water to turn. The gong protection cover and motor housing are made of corrosion resistant.

Outside alarms might not be necessary where the sprinkler system is used as part of a central station auxilliary remote station or proprietary signaling fire alarm system utilizing listed audible inside alarm devices. Hd water motor gong is a hydraulically operated outdoor alarm for use with fire protection systems. Notice the tyco model. So in an electric bell an electromagnet forms an important part along with armature spring armature rod hammer and a gong.