Fire and Smoke actuator, 70in-lb, spring return, 350 degree F for limited time, 15 sec. cycle time| Application | The type FSNF spring-return actuator is intended for the operation of smoke and combination fire and smoke dampers in ventilation and air-conditioning systems. The actuator will meet requirements of UL555 and UL555S when tested as an assembly with the damper and will meet requirements of UBC for 15 second opening and closing at 350�F. Square footage of damper operated will depend on make and model and the temperature required. IMPORTANT 24VDC NOTE: The FSNF24 & -S models will not operate below 24VDC. A filtered and regulated power supply must be used. |
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| BAE165 US | 165� F electric thermal sensor, SPST, normally closed. |
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| S2A-F US | Auxiliary switch, 2x SPDT, 3A (0.5A inductive) @250 VAC max. |
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| AF-P | Anti-rotation bracket AF/NF. |
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| IND-AF2 | Classic AF/NF position indicator. |
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| K4-1 US | Classic AF/NF jackshaft clamp (up to 1.05?). |
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| KH-AF | Classic AF/NF crankarm for Shafts to 3/4?. |
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| KH-AF-1 US | Classic AF/NF crankarm for Jackshaft to 1.05?. |
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| SH8 | Push rod for KG6 & KG8 ball joints (36? L, 5/16? diameter). |
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| ZDB-AF2 US | Angle of rotation limiter for Classic AF/NF. |
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| ZG-100 | Univ. right angle bracket (17? H x 11-1/8? W x 6? base). |
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| ZG-101 | Univ. right angle bracket (13? H x 11? W x 7-7/16? base). |
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| ZG-AF US | Classic AF/NF crankarm adaptor kit. |
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| ZG-AF108 | Classic AF/NF crankarm adaptor kit with ZG-108. |
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| ZG-DC1 | Damper clip for damper blade, 3.5? width. |
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| ZG-DC2 | Damper clip for damper blade, 6? width. |
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| ZS-100 | Weather shield - galvaneal (13? L x 8? W x 6? D). |
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| ZS-150 | Weather shield - PC w/ foam seal (16? L x 8-3/8? W x 4? D). |
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| ZS-260 | Explosion proof housing. |
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| ZS-300 | NEMA 4X, 304 stainless steel enclosure. |
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| Operation | Mounting of the actuator to the damper axle shaft or jackshaft (3/8? to 1.05?) is via a cold-weld clamp. Teeth in the clamp and V-bolt dig into the metal of both solid and hollow shafts maintaining a perfect connection. The specially designed clamp will not crush hollow shafts. The bottom end of the actuator is held by an anti-rotation strap or by a stud provided by the damper manufacturer. The actuator is mounted in its fail safe position with the damper blade(s) closed. Upon applying power, the actuator drives the damper to the open position. The internal spring is tensioned at the same time. If the power supply is interrupted, the spring moves the damper back to its fail-safe position. |
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| Typical Specification | All smoke and combination fire and smoke dampers shall be provided with Belimo FSTF, FSLF, FSNF, or FSAF actuators. All substitutions must be approved before submission of bid. Damper and actuator shall have UL 555S Listing for 250�F (350�F). Actuator shall have been tested to UL 2043 per requirements of IMC 602.2 and NEC 300.22 (c). Where position indication is required -S models with auxiliary switches or damper blade switches will be provided per code requirements. |
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