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UL listed, connect to NAC, polar two-wire, conventional device
The FW971R and FW971W Horns are audible signal appliances listed according to UL 464 and ULC-S525 for indoor use. The temporal tone generated by the horn portion is designed as per ANSI and NFPA72 for standard emergency evacuation signaling requirement. The horn has the feature that can synchronize multiple horns in a complete fire alarm system.

The product must be used within its published specifications and properly installed, operated, and maintained, in accordance with these instructions. Users are solely responsible for determining whether a product is suitable for the user’s purposes or achieves the intended results. Read the instructions carefully before using this product. Failure to comply with any of the instructions, cautions, and warnings could result in improper application, installation and/or operation of these products in an emergency situation. 

Do not paint this device.
Any material extrapolated from this document or from Maple Armor’s instructions or other documents describing the product for use in promotional or advertising claims, or for any other use, including description of the product’s application, operation, installation, and testing is the sole responsibility of the user. Maple Armor will not assume any liability for such use. In no case will Maple Armor’s liability exceed the purchase price paid for a product.

Operating Voltage           Regulated 16 to 33 VDC/FWR
RMS Operating Current (mA)DC35
Sound Level (dBA)Voltage16V24V33V
Directional CharacteristicsHorizontal AxisAngleOSPL (dBA)
0° (ref)0 (ref)
± 44°-3
± 54°-6
± 90°-10.5
Vertical AxisAngleOSPL (dBA)
0° (ref)0 (ref)
± 52°-3
± 55°-6
± 90°-12
Operating Temperature0° C to 49° C (32° F to 120° F)
Operating Humidity 0 to 93% RH
Horn PatternTemporal 3
Wire Size 12 to 18 AWG
Location Indoor wall/ceiling
Compatible ModelFW951 Sync Module, FW106 FACP

1.Mount the FW900 base onto a 4x4 electrical box, see Figure 1.

Figure 1. Base Installation
2.Connect the wires. See Figure 2 and Figure 3.
                         (a) Class A Circuit without Audible Silence Feature                        (b) Class A with Audible Silence Feature
                           (c) Class B without Audible Silence Feature                             (d) Class B with Audible Silence Feature

Figure 2 Wiring Diagram with FW951 Sync Module

                                                       (a) Class A circuit                                                             (b) Class B circuit
Figure 3 Wiring Diagram with FW106 FACP
3.Combine the horn with base – Align the horn onto the base then twist it in clockwise.
4.Test for proper operation. Initiate the horn from the connected sync module or FACP and observe for proper operation.
(1)To avoid electrocution that could result in personal injury or death, remove all sources of power and allow 10 minutes to discharge stored energy prior to installing or removing equipment. Install this device in accordance with all applicable codes and the Local Authorities Having Jurisdiction.
(2)Electrical supervision requires breaking the wire run at each terminal. Do not loop the signaling circuit field wires around the terminals.
(3)Check the manufacturer’s installation instructions for other equipment used in the system for any guidelines or restrictions on wiring and/or locating NACs and notification appliances. Some system communication circuits and/or audio circuits, for example, may require special precautions to assure electrical noise immunity (e.g., audio crosstalk).
(4)Check that the installed product will have sufficient clearance and wiring room prior to installing bases. Do not over tighten mounting screws as this can deform the base and may affect operation.

Scheduled inspection and operational test should be carried as per requirement set out by Local Authority Having Jurisdiction.
Return the device for reparation if it fails to alarm during testing. Do not disassemble the detector without permission.