Models FDBZ492, FDBZ492-R and FDBZ492-HR from Siemens Industry, Inc., are air .. To test the FP-11/-11C detector refer to its installation instructions. INTRODUCTION. The FDBZ-WT watertight enclosure provides protection to Siemens Smoke Detectors when installed in an Air. Duct Monitor Housing. Global Air Duct Monitoring Housing. Installation Instructions. Model FDBZ492-PR. INTRODUCTION. Model FDBZ492-PR from Siemens Industry, Inc., is a RoHS. INTRODUCTION. Models AD2-P, AD2-PR and AD2-XHR (AD2 Series) from. Siemens Building Technologies, Inc., are air duct monitoring housings containingModels FDBZ492, FDBZ492-HR, FDBZ492-R and FDBZ492-RP {with Refer to the installation manual of Compatible with various Siemens - Fire Safety. INTRODUCTION. The SIEMENS Model AD-HR is a sampling tube, air duct monitoring housing. When used with a compatible smoke detector, smoke and Installation Instructions. Model FDBZ492-RTL INTRODUCTION. The FDBZ492-RTL Remote Alarm Indicator (Figure 1) Siemens Canada Limited. Building The Siemens - Fire Safety Model 'FDBZ'-series of airduct-detector housings are Refer to the installation manual for the respective conventional fire system. The Siemens - Fire Safety Model 'FDBZ'-series of airduct-detector housings are Refer to the installation manual for the respective conventional fire system.