Installation and Maintenance Manual

42 UNT-SVX07D-EN
Installation—General
Installing the Unit
Follow the procedures below to install the unit properly.
Refer to “Dimensions and Weights,” p. 12 for specific unit
dimensions and mounting hole locations.
Vertical Units
Install vertical units in an upright position using the 5/8-
inch diameter double key slot hanger holes, located on the
back of unit. The hanger holes allow a maximum shank
size of 5/16-inch diameter threaded rods or lag screws
(installer provides).
1. Prepare wall openings for recessed units. Reference
unit submittal for each unit size dimensions. When
installing vertical units, consideration should be given
for units with an outside air intake.
2. If the unit has leveling legs, adjust them correctly to
level unit.
3. Mark the position of the k
eyslot hanger holes on the
wall according to the dimensions given in
“Dimensions and W
eights,” p. 12 for each unit model
and size. Align the hole locations evenly.
4. Insert the threaded rods or lag screws in
the wall before
setting the unit in place.
5. Remove the front panel (cabinet un
it only) by lifting it
upward.
6. Position the hanger holes, located on the back of the
un
it, over the rod or lag screw heads, pushing the unit
downward to properly position.
7. Complete piping and wiring connections, in addition to
an
y necessary ductwork to the unit as instructed in the
following sections. Ensure that the auxiliary drain pan
is in position on fan-coil units.
8. Install the front panel before star
ting the unit.
On cabinet units, replace the front panel by aligning the
bo
ttom tabs on the unit with the respective slots on the
panel bottom. Slide the front panel down onto the tabs
while holding the panel close as possible to the cabinet.
While the bottom tabs are engaged, slide the front panel
upward enough to allow the top engaging edge of the front
panel to lap over the engaging edge of the unit. This
should allow the panel to drop down and lock into
position.
On recessed units, install the front panel by aligning and
locking together the interlocking support channel of the
panel and unit. While holding the panel against the unit,
tighten the screws at the top of the panel until it fits tight
against the unit’s front. Do not over tighten the screws.
Horizontal Units
Install horizontal units suspended from the ceiling using
the four 5/8-inch diameter double key slot hanger holes,
located on the top of the unit. The hanger holes allow a
maximum shank size of
5/16-inch diameter threaded rods or lag screws (installer
provided). Follow the installation procedure below.
Note: Follow the requirements of National Fire Protection
Association (NFPA) Standard 90A or 90B,
concerning the use of concealed ceiling spaces as
return air plenums.
1. Prepare the ceiling opening for recessed units.
Reference the unit submittals for dimensions.
2. Position and install the suspension rods or
a
suspension device (supplied by installer) according to
the unit model and size in “Dimensions and Weights,”
p. 12.
3. On cabinet units, remove the bottom panel by using a
5/
32-inch Allen wrench to unscrew fasteners. Swing
the panel down and lift outward.
4. Level the unit by referencing the chassis end panels.
Adjust t
he suspension device.
5. Complete piping and wiring connections, in addition to
an
y necessary ductwork as instructed in the following
sections. Ensure that the auxiliary drain pan is in
position on fan-coil units.
6. Install the bottom panel before starting the unit.
7. Ensure condensate drain line is pitched one inch per
ten
feet of pipe away from the fan-coil unit.
Cabinet Units
Install the bottom panel by placing the hinged end on the
unit’s hinged end (always at the return end of the unit).
Refer to “Dimensions and Weights,” p. 12 for keyslot
hanger hole locations. Swing the panel upward into
position. Secure the panel with the fasteners provided. Do
not overtighten the fasteners.
Recessed Units
Refer to “Dimensions and Weights,” p. 12 for mounting
locations and unit weights. Follow the procedure below
and see Figure 15, p. 43.
NOTICE:
Electrical Wiring!
Do not allow electrical wire to fall between the unit and
installation surface. Failure to comply may result in
electrical shorts or difficulty accessing wires.
NOTICE:
Motor Overload!
All unit panels and filters must be in place prior to unit
startup. Failure to have panels and filters in place may
cause motor overload.
UNT-SVX07_-EN.book Page 42 Friday, April 27, 2012 9:40 AM