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Appendix B: Conversion factors and formulas

The conversion factors provided in this appendix are intended to ease data calculation for systems

that do not provide information in the format requested in this Site Preparation Guide. The following

list includes the conversion factors used in this document, as well as additional conversion factors that

might be helpful in determining those factors required for site planning.

Conversion factors for refrigeration

• 1 watt = 0.86 kcal/hour

• 1 watt = 3.412 British thermal unit (Btu)/hour

• 1 ton = 200 Btu/minute

• 1 ton = 12,000 Btu/hour

• 1 ton = 3,517.2 W

Metric equivalents

• 1 centimeter = 0.3937 inch

• 1 meter = 3.28 feet

• 1 meter = 1.09 yards

• 1 inch = 2.54 centimeter

• 1 feet = 0.305 meter

• 1 cubic feet/minute (CFM) = 1.7m

/hour

kVA conversions

• Three phase kiloVolt-Amps (kVA) = V × A × �

• Singl

e phase kVA = V × A⁄1000

Formulas

• kVA = [Voltage x Current (amps)]/1000

• Watts = VA x power factor (PF)

• Btu = Watts x 3.41

√3⁄1000

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HP Modular Cooling System Manuale di Installazione Pagina 57