Combination Ratio Restrictions; Center Of Gravity - Carrier 38VMA072RDS5-1 Engineering Data Book

Combination Ratio Restrictions

e.g. Outdoor unit 38VMA240RDS5-1(6-1) has 240 as the capacity index.
It is recommended to keep a proper combination ratio for the entire system.
MIN. COMBINATION
RATIO
50%
NOTES:
1. When 40VMH048, 054, 072, 096---3 is installed.
2. When outside air processing units (40VMA) and standard indoor units are connected, the total capacity index of the 40VMA must
be limited to 30% or less of the capacity index of the outdoor unit. When 40VMA and 40VMZ indoor units are connected with
no additional indoor units, the 30% rule does not apply.

Center Of Gravity

Table 17 —Combination Ratio
40VMH *1 only When 40VMA and indoor
40VMV only
100%
52-3/4
NOTE: All dimensions are shown in inches.
Fig. 1 —38VMA072, 096, 120RDS Models
MAX. COMBINATION RATIO
Including 40VMH *1 or 40VMV
units connected
100% *2
18
Other indoor unit
at least one unit
130% *3
11-13/16
31-7/64
models
150%