York YK - SI Metric Conversion

JOHNSON CONTROLS
FORM 160.75-EG1 (519)
112
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.
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 efciency is measured
in kW / ton:
kW/ton =
kW input
tons refrigeration effect
In the Sl Metric system, chiller efciency is measured in
Coefcient of Performance (COP).
kW/ton =
kW input
kW refrigeration effect
kW / ton and COP are related as follows:
kW/ton =
3.516
COP
COP =
3.516
kW/ton
SI Metric Conversion
MEASUREMENT
MULTIPLY THIS
ENGLISH VALUE
BY
TO OBTAIN THIS
METRIC VALUE
CAPACITY
TONS REFRIGERANT
EFFECT (ton)
3.516 KILOWATTS (kW)
POWER
KILOWATTS (kW) NO CHANGE KILOWATTS (kW)
HORSEPOWER (hp) 0.7457 KILOWATTS (kW)
FLOW RATE GALLONS / MINUTE (gpm) 0.0631 LITERS / SECOND (L/s)
LENGTH
FEET (ft) 304.8 MILLIMETERS (mm)
INCHES (in) 25.4 MILLIMETERS (mm)
WEIGHT POUNDS (lb) 0.4536 KILOGRAMS (kg)
VELOCITY FEET / SECOND (fps) 0.3048 METERS / SECOND (m/s)
PRESSURE DROP
FEET OF WATER (ft) 2.989 KILOPASCALS (kPa)
POUNDS / SQ. INCH (psi) 6.895 KILOPASCALS (k Pa)
FOULING FACTOR
ENGLISH l-P
(fT
2
°F hr/Btu)
EQUIVALENT Sl METRIC
(m
2
k/kW)
0.0001 0.018
0.00025 0.044
0.0005 0.088
0.00075 0.132