18
NOTE: The gasketing of the unit to the roof curb is critical for a
watertight seal. Install gasket supplied with the roof curb as shown
in Fig. 16-18. Improperly applied gasket can also result in air leaks
and poor unit performance.
ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
A non-combustible sleeper rail can be used in the unit curb sup-
port area. If sleeper rails cannot be used, support the long sides of
the unit with a minimum of 4 equally spaced 4-in. x 4-in. (102 mm
x 102 mm) pads on each side. Locate pads so that they support the
rails. Make sure to avoid the fork openings.
Fig. 14 — Unit Leveling Tolerances
Fig. 15 — Typical Access Panel and Compressor
Locations
Table 2 — Operating Weights
A-B
0.25 (6)
B-C
0.5 (12)
A-C
0.5 (12)
MAXIMUM ALLOWABLE
DIFFERENCE IN. (MM)
A
B
C
CONTROL BOX
ACCESS PANEL
FILTER AND
INDOOR COIL
ACCESS PANEL
INDOOR BLOWER
ACCESS PANEL
GAS HEAT
ACCESS PANEL
COMPRESSOR
(EACH SIDE)
HOOD CARTON LOCATION
(REAR ACCESS PANEL)
48TC
UNITS — lb (kg)
17 20 24 28 30
Base Unit
Novation
®
Coil 1824 (829) 1839 (836) 1989 (904) 2118 (963) N/A
RTPF Coil 1907 (867) 1922 (874) 2072 (942) 2197 (999) 2640 (1200)
Economizer 246 (112) 246 (112) 246 (112) 246 (112) 246 (112)
Powered Outlet 35 (16) 35 (16) 35 (16) 35 (16) 35 (16)
Humidi-MiZer
®
System 110 (50) 110 (50) 120 (54) 120 (54) N/A
Curb
14-in. (356 mm) 240 (109) 240 (109) 255 (116) 255 (116) 255 (116)
24-in. (610 mm) 340 (154) 340 (154) 355 (161) 355 (161) 355 (161)
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