Installation manual
IM-487 Page 19
Lifting Points
Use Table 3 & Table 4 and Figure 19 to determine lifting
cable lengths and if four or six-pint lifting is required.
Refer to Figure 19 and note that dimension A is the distance
between the outer lifting points. The four outer rigging cables
must be equal to or longer than dimension A. Dimension B
shows the minimum distance between the outer and the inner
lifting points for six-point lifting. This can be used to roughly
determine the required length of the middle cables for six-
point lifting. Dimension A can be determined by subtracting
dimensions X and Y from dimension Z.
(i.e., A = Z - X).
Where:
Z =Total unit length in inches
(refer to certified drawings for this dimension).
X =Outdoor/return air section length
(refer to Table 3 for this dimension).
If A ≤ 288" (7315 mm), 4-point lifting is sufficient.
If A > 288" (7315 mm), 6-point lifting is required.
Table 3: RAH "X" Dimension (see Figure 19)
Table 4: RDS "X" Dimension (see Figure 19)
Figure 19. Unit Type RAH Lifting Points
Split Units
Although units typically ship from the factory as complete
units, they can be factory split at the supply fan bulkhead and
connected later on the roof. This configuration is ordered if
the shipping length or a weight limitation prevents ordering a
packaged unit.
A single nameplate is attached to the air handler section and
power is supplied to both sections through the optional main
control box as in a packaged unit.
Type of Economizer
Section
047C 077C
100% OA 00
Plenum 48” (1219 mm) 72” (1829 mm)
0- 30% OA 48” (1219 mm) 72” (1829 mm)
0 - 100% Economizer 72” (1829 mm) 96” (2438 mm)
0 - 100% Economizer
With Return Fan
72” (1829 mm) 96” (2438 mm)
Outdoor/Return Air
Section
800C 802C
100% OA 0 0
Plenum 40” (1016 mm) 52" (1321 mm)
0- 30% OA 40” (1016 mm) 52" (1321 mm)
0 - 100% Economizer 40” (1016 mm) 52" (1321 mm)
0 - 100% Economizer
With 15" Return Fan
62" (1575 mm) —
0 - 100% Economizer
With 30" Return Fan
52" (1321 mm) 52" (1321 mm)
0 - 100% Economizer
With 40" Return Fan
— 80" (2032 mm)
A
Z
X
4 Lifting Points
X
6 Lifting Points
B
A
Z
RDS 800: B Min. = 62" (1515 mm)
RDS 802: B Min. = 84" (2134 mm)
RAH 47: B Min. = 96" (2438 mm)
RAH 77: B Min. = 120" (3048 mm)