Installing the Honeywell System Sensor BEAM1224 conventional reflected optical beam smoke detector requires careful consideration of structural geometry, line-of-sight clearance, and electrical terminations. Because the detector features a single-ended reflective architecture, all active electrical wiring is confined to the transmitter/receiver transceiver unit. The passive retroreflector requires no power feeds or signaling connections, reducing labor and conduit costs across open industrial and commercial spaces.
Spatial Layout and Mounting Considerations
On smooth ceilings, projected beam detectors must be spaced between 30 and 60 feet (9.1 to 18.3 meters) apart. The maximum distance between a projected beam path and an adjacent sidewall must not exceed one-half of the selected beam spacing (15 to 30 feet). Transceiver units and retroreflectors should be mounted firmly to solid structural walls or supports to prevent beam drift caused by building deflection or vibration.
The standard 7.9-inch by 9.1-inch (200 mm by 230 mm) reflector supports operating spans from 16 to 230 feet (5 to 70 meters). For extended spans ranging from 230 to 328 feet (70 to 100 meters), the BEAMLRK long-range accessory kit—featuring a 15.7-inch by 18.1-inch (400 mm by 460 mm) 4-reflector assembly—must be installed. For complex mounting surfaces or irregular beam trajectories, installers can utilize the BEAMMMK multi-mount bracket or the BEAMSMK surface-mount kit. The unit also includes a paintable front trim cover to match specific interior aesthetics.
Field Wiring and Electrical Hookup
Field wiring terminates at plug-in removable screw terminal blocks designed to accommodate conductor sizes from 12 to 22 AWG. The BEAM1224 connects as a 4-wire conventional device to compatible fire alarm control panels supplying 10.2 to 32.0 VDC, or to addressable systems using conventional zone monitor/input modules.
- Standby Current (24 VDC): 17 mA maximum average
- Alarm Current (24 VDC): 38.5 mA maximum average
- Fault Current (24 VDC): 8.5 mA maximum average
- Alignment Mode Current (24 VDC): 28 mA maximum average
- Remote Station Integration: Compatible with RTS151, RTS151KEY, RTS451, and RTS451KEY remote test and reset stations
For installations exposed to condensation, freezing, or high humidity (unit operating envelope is -30°C to 55°C and 10% to 93% RH non-condensing), the optional BEAMHK transmitter/receiver heater kit and BEAMHKR reflector heater kit should be wired to prevent optical dew formation.
Optical Sighting and Alignment Procedure
Alignment is executed directly at the transceiver without requiring specialized digital voltmeters or external test meters:
- Coarse Optical Alignment: Look through the integrated optical sighting scope (gunsight) located behind the front cover. Adjust the independent horizontal and vertical mechanical thumbwheels (providing ±10 degrees of adjustment range) until the passive reflector is clearly centered in the gunsight view.
- Digital Signal Metering: Activate alignment mode and observe the integrated 2-digit digital display. Turn the adjustment thumbwheels incrementally to peak the signal strength readout to the maximum obtainable numerical value.
- Final Securement & Normal Mode: Once signal peaking is verified, exit alignment mode. The transceiver will calibrate its Automatic Gain Control (AGC) baseline. Observe the local status LEDs: the green LED flashes during normal standby operation, red indicates alarm, and yellow indicates trouble/fault (such as a 96% or greater beam blockage).
