P82475 K
Sheet 7 of 9
MOUNTING NOTES:
CAUTION:
Check that the installed product will have sufficient clearance and wiring room prior to installing backboxes and
conduit, especially if sheathed multiconductor cable or 3/4" conduit fittings are used.
1. Multitone Strobe models can be flush mounted to a standard 4 inch square by 2-1/8 inch deep electrical box (Figure A) or a
standard 2-gang by 3-1/2" inch minimum deep electrical box (Figure B).
2. All models can also be surface mounted to Wheelock's model IOB backbox (Figure C or D) or to a 4" square backbox (model
DBB or BB) with Wheelock's model ISP extender (Figure F and G).
3. Multitone Strobe models can also be retrofitted to an existing FSB backbox to replace Wheelock's model 7001 Strobe Horn
when used with Wheelock adapter plate model RP (Figure E).
4. All models are supplied with four snap-in covers to hide the mounting holes and provide an attractive installation. The snap-in
covers are interchangeable and have slots on each end so they can be removed if necessary (by prying them up with a thin blade
screwdriver). To insert snap-in cover, slide the outside edge of the cover (furthest edge from the strobe lens) partially into the
mounting hole recess; then align the cover so it is parallel to the grille (not tilted) and snap cover into place.
5. The IOB surface backbox has 1/2-inch conduit knockouts on two sides. It has a variety of knockouts on the back for mounting
it to recessed electrical boxes and for wire entrances (Figure D). It can also be mounted to a surface with the two mounting ears
that are supplied. The ears slide into slots on the back of the box (Figure C). Use appropriate anchors for the wood screws that
are supplied with the box (if necessary).
6. The IOB includes a prefastened gasket and four hole plugs. Make sure the condensation drain holes on the box face down and
that the box is vertical to permit drainage of any moisture. Use the mounting ears to secure the box (do not use the back
knockouts). Use the hole plugs to seal the unused mounting holes on the Multitone grille (press them in securely from the
backside of the grille). Mount the unit to the IOB with the four #8-18 screws supplied with the box.
7. Mounting hardware for each mounting option is supplied.
8. Conduit entrances to the backbox should be selected to provide sufficient wiring clearance for the installed product. When
extension rings are required, conduit should enter through the backbox, not the extension ring. Use Steel City #53151 (1-1/2"
deep) or #53171 (2-1/8" deep) extension rings (as noted in the mounting options) or equal with the same cutout area.
9. When terminating field wires, do not use more lead length than required. Excess lead length could result in insufficient wiring
space for the signaling device.
10. Use care and proper techniques to position the field wires in the backbox so that they use minimum space and produce minimum
stress on the product. This is especially important for stiff, heavy gauge wires and wires with thick insulation or sheathing.
11. Do not pass additional wires (used for other than the signaling device) through the backbox. Such additional wires could result
in insufficient wiring space for the signaling device.
