Mounting Backbox

SECTION 2

Installation

Installation

The cabinet may be either semi-flush or surface mounted. The cabinet mounts using two key slots and two 0.250” (6.35 mm) diameter holes located in the backbox. The key slots are located at the top of the backbox and the two securing holes at the bottom.

Carefully unpack the system and check for shipping damage. Mount the cabinet in a clean, dry, vibration-free area where extreme temperatures are not encountered. The area should be readily accessible with sufficient room to easily install and maintain the panel. Locate the top of the cabinet approximately 5 feet (1.5 m) above the floor with the hinge mounting on the left. Determine the number of conductors required for the devices to be installed. Sufficient knockouts are provided for wiring convenience. Select the appropriate knockout(s) and pull the conductors into the box. All wiring should be in accordance with the National and/or Local codes for fire alarm systems.

2.1 Mounting Backbox

grounding stud

The circuit board contains static-sensitive components. Always ground yourself with a

!proper wrist strap before handling any boards so that static charges are removed from the body. Use static suppressive packaging to protect electronic assemblies.

To prevent damage to the circuit board and to facilitate backbox mounting, the chassis with main circuit board and transformer can be easily removed. Loosen the tow 3/8” nuts securing the top flanges of the chassis, then slide the chassis up to free it from the lower tabs. Place the chassis assembly in a safe location until it can be reinstalled in the backbox.

 Mark and predrill hole in the wall for the center top keyhole mounting bolt using the dimensions illustrated in Figure 2.3 on page 29

See Page

 Install center top fastener in the wall with the screw head protruding  Place backbox over the top screw, level and secure

 Mark and drill the left and right upper and lower mounting holes

Note: outer holes (closest to sidewall) are used for 16” O.C. stud mounting  Install remaining fasteners and tighten

Main Circuit Board on chassis

mounting studs

mounting slots

92udchassisinbox.cdr

 

Backbox

Figure 2.1 MS-9200UDLS Chassis Removal

MS-9200UDLS PN 52750:A 11/04/05

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