VIKING WATER MOTOR ALAMRS
The Viking water motor alarms are mechanical devices actuated by a flow of water. They are designed to sound a continuous alarm while a sprinkler system operates. An alarm is a required component of every sprinkler system having more than 20 sprinklers.
A. Features
- The water motor alarms are tapped 3/4” NPT on the inlet and 1” NPT on the drain outlet.
- The water motor alarm package includes a drive shaft 16-3/4” (425 mm) long for walls 14” (356 mm) thick or less. A special extension shaft is available for walls up to 30-1/4” (768 mm) thick.
- The package also includes the required 3/4” (20 mm) NPT strainer for installation on the alarm line.
- Rated water working pressure of Model F-2 is 250 PSI (17.2 bar).
B. Accessories: (order separately)
- Extension Mounting Cup: Viking Part Number 05957B, Material: 14-Gauge Cold Rolled Steel, UNS-G10080, coated with black E-coat. The extension mounting cup is required when the wall thickness is less than 3” (76.2 mm). Refer to “INSTALLATION” instructions. See Figure 2.
- Closure Plate: For use with Model F-2 only, Viking Part Number 05820B, Material: 16-Gauge Galvanized Steel, UNS-G10080. The closure plate is required when the Model F-2 Water Motor Alarm gong is mounted on an irregularly surfaced wall. It serves to prevent birds from entering the inside of the gong. The closure plate also serves as a mounting plate for sheet metal walls. Refer to “INSTALLATION” instructions. See Figure 2.
- Special Extension Shaft: Viking Part Number 03312B, Material: Stainless Steel, UNS-S30400. The extension shaft is required when the F-2 or G-2 Water Motor Alarm is installed on walls from 14” (356 mm) to 30-1/4” (768 mm) thick.
2. LISTINGS AND APPROVALS
Model F-2:
- cULus Listed - VPLX
- FM Approved - Water Motor Gongs
- LPCB Approved
- CE - Standard EN 12259-4, EC-certificate of conformity 1725-CPD-H0001
- New York City Board of Standards and Appeals - Calendar No. 219-76-SA
- VdS
- CE - Standard EN 12259-4, EC-certificate of conformity 1725-CPD-H0001
The 07862 and 07868 Water Motor Alarms Model F-2 and Model G-2 conform to the provision of EN12259-4 standard.
EN12259-4 approvals are provided by:FM Approvals Ltd. 1 Windsor Dials Windsor, Berkshire, UK. SL4 1 RS
Approval Certificate No. issued February 15, 2010.
3. TECHNICAL DATA
Specifications
Available since 1991
Shipping Weight: Model F-2: 11 lbs. (5.0 kg); Model G-2: 13 lbs. (5.9 kg)
Water working pressure: Rated to 175 PSI (12 bar)
Material Standards
Viking E-coat Spec: SPF02 W01
Ordering Information
Model F-2, Viking Part No. 07862
Model G-2, Viking Part No. 07868
4. INSTALLATION
Locate the water motor on an exterior wall as close as practical to the valve being monitored for water flow. A 3/4” (20 mm) strainer (included) is required on the alarm line as close as possible to the alarm outlet of the valve being monitored for water flow (or outlet of the retard chamber, if used). The location must be easily accessible for cleaning.
- Cut a 1-7/16” (36.5 mm) minimum to 1-5/8” (41.3 mm) maximum diameter hole in the building wall to accommodate the 3/4” (20 mm) galvanized spacer pipe. (Note: Spacer pipe is NOT included in Water Motor Alarm Package). The hole through the wall must be level or pitched slightly downward toward the water motor.
- Measure the wall thickness.
- Cut and thread the spacer pipe to a length equal to: The wall thickness minus 1” (25.4 mm). If the extension mounting cup is used, add an additional 3” (76 mm) to the spacer pipe.
- Cut the drive shaft (10) to a length equal to: The total wall thickness plus 2-3/4” (70 mm). If extension mounting cup is used, add an additional 3” (76 mm).
- File the drive shaft to provide a 3/32” (2.4 mm) x 450 chamfer on both corners of both ends. File off all burrs and insert the drive shaft into the hole of the striker arm shaft.
- Slide the spacer pipe over the shaft and thread the end of the spacer pipe into the gong support assembly coupling (12).
- Slide the closure plate (if used) over the free end of the spacer pipe, up to the back of the gong. If desired, the closure plate may be fastened to the gong support by using the 9/32” (7.14 mm) diameter hole in the gong support. Use only a flat or round headed fastener that will not interfere with striker arm movement.
- Position the support assembly on the exterior wall surface by sliding the free threaded end of the spacer pipe into the hole from outside the building.
- On the inside surface of the wall: Slide the wall plate provided (9), over the free threaded end of the spacer pipe. (If an extension mounting cup is used, place it over the end of the spacer pipe with the flared end toward the wall before sliding the wall plate into position)
- Remove the plastic thread protectors from the threaded openings in the body of the water motor.
- Attach the water motor assembly by threading the body (3) onto the free threaded end of the spacer pipe. The chamfered ends of the drive shaft allow it to slide into position as the water motor body is threaded onto the spacer pipe. When the assembly is properly tightened, the water motor should be positioned with the 1” (25 mm) NPT drain outlet facing downward and the 3/4” (20 mm) NPT alarm line inlet horizontal. See Figures 1 and 3.
- Attach the gong, the flat washer, and the gong label (16, 17, and 18) to the gong support installed on the exterior surface of the wall, with the 5/16-18 x 12” (13 mm) screw (19). Note: The flat washer must be installed between the gong and the gong support (17).
- With galvanized, brass, or other approved corrosion-resistant piping, not less than 3/4” (20 mm) diameter, connect the water motor inlet to the alarm outlet of the waterflow detecting device. A 3/4” (20 mm) strainer (included) is required on the alarm line as close as possible to the alarm outlet of the waterflow detecting device (or outlet of the retard chamber if used). The location must be easily accessible for cleaning.
- The drain outlet of the impeller housing must discharge to an open drain. Care shall be taken to keep the drain line clean at all times.
- Note: A water motor drain line that:
- Has too many fittings, and/or
- Has a very short length of pipe between the 1” (25 mm) outlet and the first elbow in the water motor drain pipe, and/or
- s very long may result in slow drainage and reduced water motor speed. This condition can be remedied by increasing the drain pipe diameter, increasing the length of pipe to the first elbow, and/or pitching the pipe toward the discharge location.
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