LG Electronics 5CSV2-03A Selection Procedure, Select unit based on required cooling capacity

9. Selection Procedure

Step 1. Determine cooling load requirements at design conditions.

Required load conditions:
Required cooling capacity (TC)	25,000 Btu/h
Sensible capacity (SHC)	19,000 Btu/h
Temperature air entering Outdoor Unit	95°F
Temperature air entering Indoor Unit	80°F DB/67°F WB
DB — dry bulb temperature
WB — wet bulb temperature

Step 2. Select unit based on required cooling capacity.

Based on Total Cooling Capacity, choose suitable model from the specification table. The model with a nominal net capacity of 28,000 Btu/h cooling is selected.

The system consists of a LV-B2860CL.

Verify the unit performance at the given conditions in accordance with step #3.

Step 3. Determine if system selected satisfies cooling requirements.

Enter cooling capacities table on page 44 at high speed and 95°F outdoor entering air temperature with 80°F DB/67°F WB indoor entering air temperature.

Total cooling capacity = 28,000 Btu/h, Sensible capacity=21,600 Btu/h

To find capacity at intermediate conditions not in the table ;

Interpolation should be used when design conditions are between two numbers that are in the capacity table.

Extra-polation is not recommended.

If the interconnecting piping length is more than 7.5m ;

Find the capacity(%) at that particular interconnecting piping length from the coefficient of capacity change graph, on page 51.

Multiply coeffienct factor with Total Cooling Capacity & Sensible Capacity.

Ex: At 20m interconnecting piping length, from coefficient of capacity change graph, coeffienct factor is 0.94.

Total Cooling Capacity =		Capacity (%) x Total Cooling Capacity = 94x28000			=26,320Btu/h
		100		100
Sensible Capacity =	Capacity (%) x Sensible Capacity		= 94x21600	=20,304Btu/h
		100	100

42Ceiling & Floor, Ceiling Suspended (50Hz, R22)