Si Metric Conversion - York YLAA Operation Manual

SI Metric Conversion

Values provided in this manual are in the English inch-pound (I-P) system.
The following factors can be used to convert from English to the most common Sl Metric values.
MEASUREMENT
CAPACITY
POWER
FLOW RATE
LENGTH
WEIGHT
VELOCITY
PRESSURE DROP
TEMPERATURE
To convert degrees Fahrenheit (°F) to degrees Celsius
(°C), subtract 32° and multiply by 5/9 or 0.5556.
To convert a temperature range (i.e., 10°F or 12°F chilled
water range) from Fahrenheit to Celsius, multiply by 5/9
or 0.5556.
EFFICIENCY
In the English l-P system, chiller efficiency is measured
in kW / ton:
kW/ton =
tons refrigeration effect
I n the Sl Metric system, chiller efficiency is measured in
Coefficient of Performance (COP).
kW/ton =
kW refrigeration effect
kW / ton and COP are related as follows:
3.516
kW/ton =
COP
3.516
COP =
kW/ton
JOHNSON CONTROLS
MULTIPLY THIS
ENGLISH VALUE
TONS REFRIGERANT
EFFECT (ton)
KILOWATTS (kW)
HORSEPOWER (hp)
GALLONS / MINUTE (gpm)
FEET (ft)
INCHES (in)
POUNDS (lb)
FEET / SECOND (fps)
FEET OF WATER (ft)
POUNDS / SQ. INCH (psi)
kW input
kW input
BY
3.516
NO CHANGE
0.7457
0.0631
304.8
25.4
0.4536
0.3048
2.989
6.895
FOULING FACTOR
ENGLISH l-P
(fT °F hr/Btu)
2
0.0001
0.00025
0.0005
0.00075
FORM 150.72-EG6 (516)
TO OBTAIN THIS
METRIC VALUE
KILOWATTS (kW)
KILOWATTS (kW)
KILOWATTS (kW)
LITERS / SECOND (L/s)
MILLIMETERS (mm)
MILLIMETERS (mm)
KILOGRAMS (kg)
METERS / SECOND (m/s)
KILOPASCALS (kPa)
KILOPASCALS (k Pa)
EQUIVALENT Sl METRIC
(m k/kW)
2
0.018
0.044
0.088
0.132
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