York YS User Manual

Form 160.80-EG1 (708) Supersedes 160.80-EG1 (900)
Printed on recycled paper
© 2008 Johnson Controls, Inc. P.O. Box 423, Milwaukee, WI 53201 Printed in USA
www.johnsoncontrols.com
Metric Conversion Tables
MEASUREMENT MULTIPLY THIS BY TO OBTAIN THIS
ENGLISH VALUE 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 / SECONDS (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 (k Pa)
POUNDS / SQ. INCH (psi) 6.895 KILOPASCALS (k Pa)
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.
Efciency
In the English I-P system, chiller efciency is measured
in kW / ton:
kW / ton =
kW input
tons refrigerant effect
In the SI Metric system, chiller efciency is measured in
Coefcient of Performance (COP).
COP =
kW refrigeration effect
kW input
kW / ton and COP are related as follows:
kW / ton =
3.516
COP
COP =
3.516
kW / ton
Integrated Part Load Value (IPLV)
In the English I-P system, IPLV is calculated by the following
formula. A full explanation is shown on page 4:
1
IPLV* =
0.01
+
0.42
+
0.45
+
0.12
A B C D
Where: A = kW / ton at 100% Load @ 85°F ECFT
B = kW / ton at 75% Load @ 75°F ECFT
C = kW / ton at 50% Load @ 65°F ECFT
D = kW / ton at 25% Load @ 65°F ECFT
In SI Metric, the formula is:
IPLV* = 0.01A + 0.42B + 0.45C + 0.12D
Where: A = COP at 100% Load @ 29.4°C ECFT
B = COP at 75% Load @ 23.9°C ECFT
C = COP at 50% Load @ 18.3°C ECFT
D = COP at 25% Load @ 18.3°C ECFT
* NOTE: The Non-Standard Part-Load Value (NPLV) uses
the IPLV formula with the following exceptions: the ECFT
for part-load points varies linearly from the selected EFT to
65°F (18.3°C) from 100% to 50% loads, and xed at 65°F
(18.3°C) for 50% to 0% loads.
FOULING FACTOR
ENGLISH I-P EQUIVALENT SI METRIC
(ft
2
°F hr/BTU) (M
2
K/kW)
0.0001 0.018
0.00025 0.044
0.0005 0.088
0.00075 0.132

York YS Specifications

General

Brand	York
Model	YS
Category	Chiller
Language	English