Get the heat load
Use the rejected heat in Btu/h or MBH, not the cooling capacity of the machine upstream. For water, heat load in Btu/h equals 500 times GPM times the temperature drop in °F.
Fix the fluid, flow and temperatures
State water or glycol and the glycol percentage, the flow in GPM, and the entering and leaving temperatures. Glycol carries less heat per gallon than water, so it needs more flow or more coil.
Pick the design ambient
Use the site's design dry-bulb, not the average. ASHRAE climatic design data lists the 0.4% dry-bulb for each location: the temperature exceeded only 35 hours a year.
Check the approach
Approach is leaving fluid minus design ambient. A tight approach needs a large coil and more fan power. If the approach is near zero or negative, add adiabatic pre-cooling or move to a tower.
Set the limits
Note the sound limit at the property line, the footprint and the supply voltage. Those decide flat bed or V-bank, fan size and EC fans or a VFD.
Design temperatures for most sites are published in the ASHRAE climatic design conditions.