9. Selection procedure
50Hz, R410A _
21
Single Package
Single Package
Selection Procedure - Heat pump(SI)
Step 1.
Based on building's cooling load calculation from ASHRAE or any approved
standard method.
a. Cooling Capacity ...................................................................58.6 kW
b. Sensible Cooling Capacity.....................................................49.8 kW
c. Heating Capacity ...................................................................58.6 kW
d. Outdoor Entering-air Temperature ........................................35°C
e. Outdoor Air winter design Temperature(DB) .........................4°C
f. Indoor Air winter design Temperature(DB) ............................21.1°C
g. Indoor Entering-air Temp.(D.B/W.B) .....................................26.7°C / 19.4°C
f. Indoor air-flow ........................................................................3,776 l/s
g. Electrical Characteristics(V-Ph-Hz) .......................................380-415 - 3 - 50
h. External static pressure .........................................................17.78mm 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(kW) 20 ton EK-H2408C02 (SI) table, at 3,776 l/s and 35°C out-
door ambient temperature, with 26.7°C DB. 19.4°C WB air entering temperature.
Total cooling capacity= 69.1kW, Sensible capacity = 54.6kW
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.
Cooling