14
handling. Never use the riser to lift the unit. To maintain the
straight and square cabinet alignment, avoid lifting or sup-
porting the cabinet only at the top and bottom.
While the manufacturer does not become involved in the de-
sign and selection of support methods and components, it
should be noted that unacceptable system operating charac-
teristics and/or performance may result from improper or in-
adequate unit structural support. Due to variations in building
construction, floor plans, and unit configurations, each instal-
lation is different. The actual step-by-step method of installa-
tion may vary from unit to unit. However, the risers should be
moved as little as possible to avoid damage to the unit and in-
ternal components.
42SG, SH, AND SJ UNITS
1. Begin on lowest floor and progress upward, floor by
floor, to top.
2. Examine drain line (Fig. 2-6). Be sure both ends are in
place and that it forms a trap. Avoid pinching drain line.
3. Tip unit over riser hole in building floor. As unit is
righted, align riser with unit below.
NOTE: The unit must be lowered into the space, taking care to
properly align the risers to engage the riser swaged section on the
unit below. The riser should never be bent or pushed together to
be passed through the floor slot and should never be lifted up or
pulled down to meet the riser on the floor below or above.
4. Install isolator pads beneath the four corners of unit if
applicable.
5. Before anchoring the equipment in place, the unit must
be leveled, and the cabinet must be squared and brought
into line with any adjacent or included walls. The unit
may be anchored in place by bolting directly through the
unit floor or attaching to the cabinet in some location that
will not interfere with drywall or other items such as the
supply grille, thermostat, or return access panel. When
attaching to the unit cabinet, care must be taken to not
penetrate the cabinet in locations that may damage inter-
nal components or wiring. The mounting technique is a
matter of choice; however, the unit should always be
anchored securely to prevent movement during construc-
tion and riser expansion and contraction. On certain
units, shipping screws or braces must be removed after
the unit is installed. Be sure to check all tags on the unit
to determine which, if any, of these devices need to be
removed.
6. If installing a 42SJ unit, follow steps a-h. For 42SG and
42SH units, continue to Step 7.
NOTE: The 42SJ back-to-back fan coils have been designed to
serve two separate rooms. These products are classified by Un-
derwriters Laboratories Inc. for use in penetration firestop sys-
tems, control number 27WL when ordered with 1-hr rated chase.
See UL Fire Resistance Directory for more information. Figure
12 shows the 42SJ unit with standard risers and with Siamese
risers.
a. Lay out the control lines for the drywall track and
studs in the floor and ceiling (see Fig. 13).
NOTE: Tracking may be installed now or after the unit is set.
b. Position the 42SJ fan coil assembly between two
rooms with the unit drywall separation spotted over
the wall control lines.
Fig. 12 — 42SJ Unit with Standard and Siamese
Risers
Fig. 13 — 42SJ Wall Board Installation
c. If not already installed, install the floor and ceiling
tracks up to and over the 42SJ fan coil unit.
d. Position the vertical studs and fasten into each of the
stud pockets formed into the chase side panels (see
Fig. 13).
NOTE: The studs may be mechanically fastened to the 42SJ fan
coil. Care should be taken, however, not to penetrate the supply
or return water risers or internal piping. Given the levelness of
the floor and/or the fan coil assembly, some shimming may be
necessary.
e. Assemble the specified wall construction up to and
over the top of the fan coil unit (see Fig. 14).
f. With the fire-wall separation being complete, the
drywall skin on the surface of the individual fan
coils can be applied. Drywall can be applied directly
to the surface, or, if necessary, studding may be
installed on the corners for vertical control (see Fig.
14).
g. For ease of installation of the access panel, apply
drywall on the return-air side directly to the surface
of the unit (see Fig. 14). When applying the wall
board directly to the unit cabinet, it may be neces-
sary to shim the wall board in some areas to achieve
the desired finished wall surface.
h. After all drywalling and painting is complete, install
thermostats, supply air grilles and return air panels.
42SJB
42SJA
42
SJB
42SJA
INSTALL WALL
STUD INTO
POCKET
FORMED BY
CHASE SIDE
PANEL
CHASE
SIDE
PANEL
DRYWALL
TRACK AND
STUD
CONTROL
LINES
INSTALL STUDS FROM TOP OF
UNIT TO CEILING (4 CORNERS)
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