LG Multi V 5 User Manual

158 | CORRECTION FACTORS
MULTI V 5 Outdoor Unit Performance Data Manual
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Equivalent Length Calculation for Correction Factors
TEL = (ELM x Correction Factor) + ELB, where
TEL = Total equivalent length
ELM = Equivalent length to first Y-branch
ELB = Equivalent length from first Y-branch to farthest indoor unit
HU = Indoor units above outdoor unit
HL = Indoor units below outdoor unit
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Outdoor Unit = ARUM072BTE5
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Correction Factor
Overall Equivalent Pipe Length
Standard Application
Overall Equivalent
Length 295 feet
ARUM072-504BTE5 / DTE5
Cooling 1.0 0.5
Entering DB (ºF)
19.4 23.0 26.6 32.0 37.4 41.0 44.6
Derate factor
0.98 0.95 0.93 0.86 0.93 0.96 1.0
Table 1: Outdoor Unit Frost Accumulation Factor (Heating)
1
.
Defrost Correction Factor for Heating Operation
Figure 1: Equivalent Length.
Capacity tables do not take into consideration capacity reduction
when frost has accumulated on the condenser coil, nor during
defrost operation. Integrated heating capacity values can be
obtained as follows:
Formula: A = B x C
Where: A = Integrated heating capacity
B = Heating capacity value given in table of capacity
characteristics
C = Integrated correction factor for frost accumulation
There will be temporary reduction in capacity when snow piles up on the outside surface of the outdoor unit heat exchanger. The level of capacity
reduction depends on a number of factors, for example, outdoor temperature (°F DB), relative humidity (RH), and the amount of frost present.
1
At 85% outdoor air relative humidity.
Table 2: Pipe Length Correction Factor.
The correction factors shown below are calculated in the LATS software programs.
Outdoor Unit
Equivalent length
262 ft
Equivalent length
131ft
Branch
Indoor Unit
Indoor Unit
Gas pipe
Liquid pipe
HU
HL
ELM
ELB
CORRECTION FACTORS

LG Multi V 5 Specifications

General

Type	VRF (Variable Refrigerant Flow)
Refrigerant	R410A
Compressor Type	Inverter Scroll Compressor
Outdoor Unit Fan Type	Axial Fan
Cooling Capacity	22.4 kW to 270 kW
Energy Efficiency	High
Operating Range	Cooling: -5°C to 48°C
Power Supply	380-415V, 50/60Hz
Heat Exchanger Type	Microchannel
Control Type	Centralized Control
Indoor Unit Options	Cassette, Wall Mounted, Ducted
Heat Recovery	Available
Warranty	Varies by region (typically 5 years compressor, 1-2 years parts)