Siemens FDBZ492 Duct Smoke Detector P/N:S54319-B22-A1

The Siemens FDBZ492 Duct Smoke Detector P/N: S54319-B22-A1 is a two-wire air-duct smoke detection housing designed for direct use on heating, ventilation, and air-conditioning (HVAC) duct systems. When equipped with a compatible Siemens smoke detector and sampling tube, it detects smoke being transported through the ductwork.

The FDBZ492 supports both addressable and conventional detector applications and is the non-relay configuration within the FDBZ492 family. Siemens currently identifies S54319-B22-A1 as an active product.

Product Functions

• Provides HVAC duct smoke detection
• Two-wire configuration
• Supports addressable detector applications
• Supports conventional detector applications
• Monitors smoke transported through HVAC ductwork
• Non-relay configuration
• Supports multiple Siemens smoke detector models
• Supports multiple sampling tube lengths
• Provides local detector status indication
• Supports compatible remote indication
• Provides cover-removal trouble supervision
• Designed for fire alarm and HVAC control applications

Duct Smoke Detection

The FDBZ492 monitors air traveling through an HVAC duct.

A sampling tube extends into the duct and directs a representative air sample through the detector housing. The compatible smoke detector evaluates the sampled air for products of combustion.

When smoke is detected, the installed detector reports the condition to the associated fire alarm control system.

Two-Wire Operation

The FDBZ492 is specifically a:

Two-Wire Air-Duct Housing

It can support either an addressable or conventional detector depending on the compatible detector and fire alarm system configuration.

The housing itself does not include auxiliary control relays.

Non-Relay Configuration

The standard FDBZ492 is the non-relay version of the product family.

Related configurations include:

FDBZ492 — Two-wire housing without relays

FDBZ492-HR — Two-wire addressable housing with programmable relay

FDBZ492-R — Two-wire conventional housing with relay

FDBZ492-PR — Conventional housing with relay and built-in power supply

The FDBZ492 is appropriate where local auxiliary relay contacts are not required.

Compatible Smoke Detectors

Siemens documents the FDBZ492 for use with multiple detector models, including:

8710

FP-11

8854

HFP-11

8713

HFPO-11

PE-11

PE-11C

OP121

OOH941

OOHC941

SFP-11

SFPO-11

Additional detector compatibility can vary by fire alarm platform, so the exact detector and control panel combination should be verified.

Sampling Tubes

The FDBZ492 uses separately selected sampling tubes according to duct width.

Common options include:

ST-10 — Short sampling tube

ST-25 — Medium sampling tube

ST-50 — Longer sampling tube

ST-100 — Sampling tube for large duct widths

The detector and sampling tube are purchased separately from the FDBZ492 housing.

HVAC System Operation

The FDBZ492 is intended to detect smoke carried through HVAC ductwork rather than provide general open-area room detection.

When smoke is detected, the connected fire alarm system can initiate programmed responses such as:

• HVAC shutdown
• Fan control
• Damper control
• Fire alarm annunciation
• Smoke-control sequences
• Building automation interfaces

Actual control functions depend on the fire alarm system programming and associated equipment.

Product Identification

Model: FDBZ492

Part Number: S54319-B22-A1

Product Type: Air-Duct Smoke Detector Housing

Configuration: Two-wire

Application: Addressable or Conventional

Relay: No

System: HVAC Duct Smoke Detection

Manufacturer: Siemens

Product Status: Active

The Siemens Industry Mall currently identifies the product as FDBZ492 – Air-Duct Housing, with market-facing part number S54319-B22-A1.

FDBZ492 Datasheet