FMS-1655M
LIT-12013119
11
Thin flush mount mounting
procedure
The FMS-1655M thin flush mount
model offers an attractive stainless steel
faceplate with an ultra-thin enclosure
(less than ¾” thick) that may be installed
in any application where wall depth is
either unknown or extremely limited.
New construction applications can take
advantage of the included wall box
that may be installed during the rough-
in phase. For retrofit applications not
requiring electrical conduit termination,
the unit may be installed using the
retrofit mounting plate that simplifiesthe
installation process.
1. The FMS-1655M thin flush mount
modeloffers an attractive stainless
steel faceplate with an ultra-thin
enclosure (less than ¾” thick) that
may be installed in any application
where wall depth is either unknown or
extremely limited. New construction
applications can take advantage of the
included wall box that may be installed
during the rough-in phase. For retrofit
applications not requiring electrical
conduit termination, the unit may be
installed using the retrofit mounting
plate that simplifies the installation
process.
2. If this is a new construction project and
the wall box has been installed, you
may skip the next two steps. If this is a
retrofit application and existing drywall
is in place, then proceed with the next
step to prepare the opening for the
FMS-1655M thin flush mount model.
3. Using the retrofit mounting plate (see
Figure 3b) as a template, trace the
inner outline ontothe drywall at the
desired mounting location with a pencil
or marker. Also mark the location of the
two mounting holes on the drywall. Cut
along the traced outline with a drywall
knife or saw, taking care not to make
the opening too large. Drill out the two
holes to clear access to the mounting
clip nuts. Remove the cut section of
drywall and discard. Be sure to brush
off any drywall dust or remnants from
the inside surface of the opening to
ensure proper adhesion of the retrofit
mounting plate.
4. Remove the paper backing from the
two adhesive strips on the retrofit
mounting plate and insert it into the
cut opening of the drywall. The retrofit
plate should be oriented such that the
corner notch is located at the lower left
corner of the opening in the drywall,
with the tabs bent towards you. Using
the four tabs on the retrofit mounting
plate as alignment guides, press the
mounting plate onto the inside surface
of the drywall opening firmly to ensure
maximum adhesion.
Fig 3b. Retrofit Mounting Plate
5. The electrical connections must
terminated before installing the
stainless steel faceplate of the FMS-
1655M. Run the 4-conductor, dual
twisted pair, interface cable from the
FMS1655M remote sensor to the
FMS1655M display. Refer to the wiring
diagram shown at end of this manual
for details.
6. Terminate the interface cable
originating from the remote sensor
at the 4-position terminal block CN3
on the back side of the FMS-1655M
display, ensuring proper electrical
connections. Power connections
should be terminated at +V and GND
of the CN3 terminal block and sensor
comms at + & - terminals at CN3.
Insure proper polarity of the comms
wiring is maintained between sensor
and display.
7. For monitoring the FMS1655M over
a BACnet MS/TP network, terminate
the BACnet network cable at CN7 of
the FMS1655M display. Refer to wiring
diagrams at end of this manual for
details.
8. With the electrical connectionsproperly
terminated, the stainless steel
faceplate may be installed using
the two flat head machine screws.
For retrofit applications where the
mounting plate has been affixed to
the inside surface of the drywall, the
two mounting screws thread into the
clip nuts of the mounting plate. For
those applications where the wall box
has been installed, the two mounting
screws fasten the faceplate directly.
Fig 3c. Basic FMS1655M thin mount assembly
