Equipment Selection Procedure - LG LH247HV Engineering Manual

equiPment SeleCtion ProCedure

Cooling / Heating Correction Factors
For Ceiling-Concealed Duct (High Static)
Also, determine the elevation difference of the indoor unit above or below the outdoor unit. Find corresponding cooling or heating capacity
correction factors as shown below. Multiply the correction factors by the cooling or heating capacity obtained from the capacity table using
design conditions. The result is the NET cooling or heating capacity.
Refrigerant Line Length Derates
For air-cooled systems, a capacity correction factor may have to be applied to account for the length of the system's refrigerant pipe. Rate of
change in capacity due to increased piping lengths is shown below.
Table 21: Cooling Capacity Coefficient Factor.
Piping Length (ft.)
LH247HV (24,000 Btu/h)
Rate of Capacity
Change (%)
LH367HV (36,000 Btu/h)
Table 22: Heating Capacity Coefficient Factor.
Piping Length (ft.)
LH247HV (24,000 Btu/h)
Rate of Capacity
Change (%)
LH367HV (36,000 Btu/h)
Equivalent Piping Length for Piping Components
Table 23: Equivalent Piping Length for Elbows.
Component
1/4 3/8
Elbow (ft.)
0.5 0.6
Altitude Correction Factor
The impact of air density must be considered on systems installed at a significant altitude above sea level, therefore, locally accepted
altitude correction factors must be applied.
34 | duct (HIgH StatIc)
systems, calculate the equivalent length of the liquid line from the outdoor unit to the indoor unit.
16.4 32.8
100 99.3
100 99.3
16.4 32.8
100 99.7
100 99.7
1/2 5/8 3/4 7/8
0.7 0.8 1.2 1.3
Due to our policy of continuous product innovation, some specifications may change without notification.
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49.2 65.6 98.4 131.2
97.9 96.6 93.8 91.1
97.9 96.6 93.8 91.1
49.2 65.6 98.4 131.2
99.2 98.7 97.7 96.6
99.2 98.7 97.7 96.6
Size (Inches)
1 1-1/8 1-1/4
1.5 1.6 1.8
164.0 196.9 229.7
88.4 - -
88.4 85.6 82.9
164.0 196.9 229.7
95.6 - -
95.6 94.6 93.5
1-3/8 1-1/2 1-5/8 1-3/4
2.0 2.1 2.3 2.5
246.0
-
81.5
246.0
-
93.0
2-1/8
2.8