Installation manual

Page 14 / IM 178

Lifting points

To determine the required lifting cable lengths and whether

four- or six-point lifting is required, use Tables 3 and 4 below

and Figure 8.

Referring to Figure 8, note that dimension A is the dis-

tance between the outer lifting points. The four outer rigging

cables must be equal to or longer than dimension A. Dimen-

sion 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 – Y).

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. “X” dimension (see Figure 8)

OUTDOOR/RETURN AIR

SECTION

800C 802C

100 O.A. 00

PLENUM 40" (1016 mm) 52" (1321 mm)

0-30% O.A. 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)

Y=0

Figure 8. Unit type RDS

4 lifting points 6 lifting points

800C: B Min. = 62" (1575 mm)

802C: B Min. = 84" (2134 mm)