Carrier A180218C - Decorative Trim Plate; Mounting

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4.5. Decorative Trim Plate
Sold separately, a thin decorative trim plate is available to hide any marks/screw
holes left from the previous thermostat. The trim plate is captured between the
backplate and the system control. Align the trim plate around the backplate, and
snap on the system control.
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NOTE: Once the Infinity System Control is secured to wall with the backplate
assembly (snapped together), care must be taken not to bend or break the
interlocking tabs when removing.
4.5.1 Mounting
First become familiar with all plastic assembly pieces shown on the following page.
The Infinity System Control will snap together with the standard backplate supplied
with the wall control. Attach backplate using only a small hole in the wall allowing
a four wire connection to pass through. Mount the front assembly to the standard
backplate. The figure below shows the optional decorative trim plate, described in
Section 4.5, installed with the standard backplate. The decorative trim plate is
captured between the backplate and the system control. Align the decorative trim
plate around the backplate, and snap on the system contro l.