3.1 Bracket Mounting
NOTE: The use of the B334 Mounting Bracket (included) is strongly recommended when installing this detector.
Because variations exist in the surfaces of most mounting walls, most units are not mounted at perfect angles to the floor or walls. This may cause the pattern to point away from the “ideal” direction.
For example: A shift of only 1 degree will cause a pattern shift of
1.7ft. (0.52 m) at 100 ft. (30.5 m). Under worst case conditions, this will cause the pattern to be aimed over the head of intruders at maximum range, or into walls of narrow corridors. What may seem to be poor range or catch performance, may be the result of improper alignment.
B334 COVER
NOTCH
THREADED STUD
B334 BODY
DS794Z BASE
Lock Washer
WASHER EARS OUT 
CURVED WASHER
NOTCHED SIDE DOWN 
HEX NUT
Bracket to Base Assembly
To insure proper catch performance, a bracket mounted detector permits the flexibility needed to properly adjust the direction of the coverage pattern.
If Mounting to the B334 Mounting Bracket:
•Remove the cover of the bracket by inserting a thin screwdriver into the notch on the side of the bracket and twisting gently.
•Insert the alarm and power wiring through the center hole from the rear of the B334 base. (Do not insert wiring if the bracket is to be surface mounted).
•Mount the B334 to a standard
•Remove the circuit board from its base. Press the two circuit board retainer tabs outward and lift the circuit board away from the base.
•Remove the sticker covering the entrance from the back of the detector base.
•Insert the threaded stud through the appropriate stud hole in the B334 bracket. Use the bottom hole for wall mounting or the front hole for ceiling mounting. Make sure the hex head is seated in place.
•Complete the assembly by securing the detector base to the B334 bracket using the supplied curved washer and hex nut (see drawing).
•Hand tighten the hex nut.
•Thread the bracket wiring through the stud and along the wiring channel in the detector’s base to the area of the circuit board’s terminal strip.
•Return the circuit board to its base. Slide the back of the circuit board under the tabs at the back of the base, then snap the front into place.
•Aim the detector in the desired general direction and tighten the hex nut using the supplied hex wrench.
•Should the detector require realignment, loosen the hex nut, reposition the detector, and then retighten the nut.
WIRE ENTRANCE |
STUD HOLE FOR |
CEILING MOUNTED |
BRACKET |
STUD HOLE (HIDDEN) |
FOR WALL MOUNTED |
BRACKET |
MOUNTING |
HOLES (4) |
B334 Bracket
3.2 Surface or Corner Mounting
•Remove the circuit board from its base. Press the two circuit board retainer tabs outward and lift the circuit board away from the base.
•Select and break away the appropriate
•Using the base as a template, mark the location of the mounting holes on the mounting surface.
•Route the wiring to the rear of the base and through the wire entrance. Firmly mount the base to the mounting surface.
NOTE: Be sure all wiring is unpowered
•Return the circuit board to its base. Slide the back of the circuit board under the tabs at the back of the base, then snap the front into place.
4.0 Wiring
ONLY APPLY POWER AFTER ALL CONNECTIONS HAVE BEEN MADE AND INSPECTED.
NOTE: Do not coil excess wiring inside unit.
Locate the
•Terminals 1
•Terminals 3, 4, & 5: Alarm relay contacts rated 125 mA, 28 VDC maximum for DC resistive loads. Use terminals 4 & 5 for Normally Closed circuits. Do not use with capacitive or inductive loads.
•Terminals 6 & 7: Tamper contacts rated at 28 VDC, 125 mA.
•Terminal 8: Trouble. Solid State Trouble output. Shorts to ground
Page 2 | © 2011 Bosch Security Systems, Inc. | DS794Z Installation Instructions |
