American Dynamics ad1646 Installation Instruction

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INSTALLATION
Preparation
Several user configuration switches must be set (see SETUP
instructions, page 4).  If the unit is not configured correctly,
damage to the unit, and any other device connected to it, may
result.  Check all wiring and cabling before applying power.
Mounting
The 1646 Receiver is an outdoor unit but can be used indoors
also.  Mount the unit with the hinges on the left.  To minimize
the voltage drop in the wiring, mount the unit near the camera
to be controlled. For maximum heater performance mount the
unit with the hinges on the left.
Different mounting procedures are recommended when
attaching the unit to different surfaces.  Mount the unit with
four 1/4-inch bolts appropriate to the type of mounting surface.
See Figure 2 for mounting dimensions. 
When mounting to wood studs:
Use lag bolts (with a drilled pilot hole) or wood screws which
will penetrate the wood for a minimum of 1 1/4 inches. 
When mounting to concrete:
Use lead or plastic anchors, or expansion bolts, with at least a
10-pound pullout rating.  Install according to the
manufacturer's instructions.
When mounting to steel surfaces:
Drill four bolt clearance holes and use bolts with lockwashers
and nuts.
When mounting to drywall (gypsum board):
Material must be at least 1/2 inch thick, and the unit must be
mounted with toggle bolts.  
The housing dimensions which include the NEMA-4 box are 5
3/8-inches high x 8 3/4-inches wide x 11 5/16-inches in length.
3
INSTALLATION
6.0" (152 mm)
10.75"
(270 mm)
5/16" (0.3125) (12mm) Diameter
Hole - 4 Places
Figure 2 - Mounting Hole Dimensions