LC369HHV User Manual

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PERFORMANCE DATA | 59

Performance Data

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Cooling / Heating Correction Factors

For Four-Way Ceiling Cassette systems, calculate the equivalent length of the liquid line from the outdoor unit to the indoor unit. 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 resultant is the NET cooling or heating capacity.

Refrigerant Line Length Derates

For air-cooled systems, a capacity correction factor will 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.

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EQUIPMENT SELECTION PROCEDURE

Piping Length (ft.) 16.4 24.6 32.8 49.2 65.6 82.0 98.4 114.8 131.2 147.6 164 180.4 196.9 213.3 229.7 246

Cooling Capacity Coefficient Factor.

Rate of Capacity

Change (%)

LC188HHV4 (18,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - - -

LC249HHV (24,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - - -

LC369HHV (36,000 Btu/h) 100 100 100 100 100 99.3 98.5 97.8 97.0 96.3 95.5 94.8 94.0 93.3 92.5 91.8

LC429HHV (42,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1

LC489HHV (48,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1

Heating Capacity Coefficient Factor.

Rate of Capacity

Change (%)”

LC188HHV4 (18,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - -

LC249HHV (24,000 Btu/h) 100 100 100 100 100 99.4 98.8 98.2 97.5 96.9 96.3 - - - -

LC369HHV (36,000 Btu/h) 100 100 100 100 100 99.3 98.5 97.8 97.0 96.3 95.5 94.8 94.0 93.3 92.5 91.8

LC429HHV (42,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1

LC489HHV (48,000 Btu/h) 100 100 98.8 97.5 96.3 95.1 93.9 92.7 91.5 90.3 89.1 87.9 86.7 85.5 84.3 83.1

Equivalent Piping Length for Piping Components

Component Size (Inches)

Elbow (ft.)

1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-5/8 1-3/4 2-1/8

0.5 0.6 0.7 0.8 1.2 1.3 1.5 1.6 1.8 2.0 2.1 2.3 2.5 2.8

Table 46: Equivalent Piping Length for Elbows.

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.

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LG Electronics LC369HHV LG Single Zone Mini Split System with 36000 BTU Cooling Capacity, 40000 BTU Heating Capacity, 230/208 Volts and LGRED Heat Technology in White