Selection Procedure - LG AK-H1208C02 Engineering Product Data Book

Single Package

9. Selection procedure

Selection Procedure - Heat pump(English)
Cooling
Step 1. Based on building's cooling load calculation from ASHRAE or any approved
standard method.
a. Cooling Capacity ...................................................................200,000 Btu/h
b. Sensible Cooling Capacity.....................................................170,000 Btu/h
c. Heating Capacity ...................................................................200,000 Btu/h
d. Outdoor Entering-air Temperature ........................................95°F
e. Outdoor Air winter design Temperature(DB) .........................39.2°F
f. Indoor Air winter design Temperature(DB)............................70°F
g. Indoor Entering-air Temperature(DB/WB) .............................80°F/67°F
f. Indoor air-flow........................................................................8,000 CFM
g. Electrical Characteristics(V-Ph-Hz) .......................................380-415 - 3 - 50
h. External static pressure .........................................................0.70 in.Aq.
Step 2. Select unit based on required cooling capacity.
Based on total cooling capacity choose suitable model from Specifications table.
20RT unit can be selected.
Verify the unit performance at the given conditions in accordance with step #3.
Step 3.
From Gross Cooing Capacity(MBH) 20 ton EK-H2408C02 (English) table, at 8,000 CFM and 95
DB ambient temperature, with 80°F DB. 67°F WB air entering temperature.
Total cooling capacity= 235,900 Btu/h, Sensible capacity = 186,400 Btu/h
To find the capacity at intermediate points between any two values mentioned in the
capacity table, interpolation should be used. Extrapolation is not recommended.
50Hz, R410A _ 19