Amerex IS Local Application, Overhead (LAOH) Nozzle, Single Item, OEM - 16216
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The Amerex IS Local Application Overhead Nozzle (LAOH, P/N 16216) is the overhead discharge nozzle for local application configurations of the Amerex IS Industrial Dry Chemical Fire Suppression System. It is mounted above the specific surface-burning hazard it protects and discharges ABC dry chemical agent directly downward onto that hazard, applying the agent to the fuel surface rather than flooding the entire enclosed space with chemical. The LAOH is used with the IS45 cylinder, which supports four LAOH nozzles per system configuration.
The Amerex IS is a pre-engineered dry chemical suppression system for industrial hazards such as paint spray booths, dip tanks, mixing rooms, and similar high-hazard occupancies where flammable liquid fires are the primary risk. The IS system's nozzle family covers several distinct discharge patterns and applications within this hazard type. LAOH is for overhead local application; other nozzles in the family serve total flood, tankside, plenum, duct, screening, and three-way discharge configurations. Each nozzle type is specified based on the hazard geometry and the protection approach called out in the system design.
LAOH Nozzle Height Requirements
The LAOH nozzle position is critical to correct agent application. The Amerex IS manual specifies a maximum nozzle height of 10 feet above the hazard surface and a minimum height of 8 feet for fuel-in-depth or splash hazard applications. Mounting the nozzle outside this range can affect the agent's ability to cover the hazard surface correctly, so height must be verified during installation and again at semiannual service if the hazard or nozzle location has changed.
Nozzle Cap
A replacement blow-off cap (P/N 14988) is installed on the LAOH nozzle orifice to prevent contamination from dust, grease, and other industrial airborne materials that can accumulate in a spray booth or industrial environment during standby. The cap blows off automatically when the system discharges and should be replaced after any actuation or whenever a cap is found to be damaged during inspection.
| Feature | Details |
|---|---|
| Manufacturer | Amerex Corporation |
| Part Number | 16216 |
| Nozzle Type | Local Application Overhead (LAOH) |
| Thread Size | 3/4 Inch Male NPT |
| Compatible Cylinder | IS45 (Supports 4 LAOH Nozzles Per System) |
| Maximum Nozzle Height | 10 Feet Above Hazard Surface |
| Minimum Nozzle Height | 8 Feet (Fuel-in-Depth and Splash Hazards) |
| Discharge Pattern | Downward Local Application onto Hazard Surface |
| Replacement Cap | P/N 14988 (Shared with TS, TF, Three-Way, D/P, and SCR Nozzles) |
| System | Amerex IS Industrial Dry Chemical Fire Suppression System |
The Amerex IS system must be designed, installed, and serviced by an Amerex-certified industrial systems installer following the Amerex IS Design, Installation, Recharge, and Maintenance Manual.
- Nozzle Aiming: The LAOH nozzle must be aimed at the correct aiming point for the protected hazard as specified in the Amerex IS Design, Installation, Recharge, and Maintenance Manual. A certified Amerex industrial systems installer verifies correct nozzle aim during installation.
- Confirm Cylinder and Nozzle Count: The IS45 cylinder supports exactly four LAOH nozzles. Verify the cylinder and nozzle count match the system design before installation.
- Cap Inspection: Confirm the blow-off cap (P/N 14988) is in place and undamaged at each inspection. Replace it after any actuation or if found damaged.
- Semiannual Service: A certified technician inspects all nozzles for orifice blockage, corrosion, and correct positioning, and confirms cap integrity at each required service interval.
What is the difference between local application and total flood protection?
Local application directs agent specifically at the surface or object that is on fire, without attempting to fill the entire space with agent. Total flood fills an enclosed space with enough agent to extinguish a fire anywhere within that volume. The LAOH nozzle is a local application nozzle that aims agent downward at a specific hazard surface. The Amerex IS system also includes Total Flood (TF) and Total Flood Perimeter (TFP) nozzles for enclosed space applications.
Why is there a minimum height of 8 feet for the nozzle?
For fuel-in-depth or splash hazards, a nozzle positioned too close to the surface can cause the agent discharge to splash burning liquid outside the containment area rather than suppressing the fire. The 8-foot minimum prevents this by allowing the agent discharge to develop a proper pattern before it contacts the fuel surface.
Can this nozzle be used with cylinders other than the IS45?
No. The Amerex IS system design specifies which cylinder and nozzle combinations are permitted. The LAOH nozzle is specified for the IS45 cylinder. Using a different cylinder requires the system design to be re-evaluated by a certified Amerex industrial systems installer.
