Si Metric Conversion - York YR Owner's Manual

Accessories and Modifications (continued)
MARINE WATER BOXES
Marine water boxes allow service access for cleaning
of the heat exchanger tubes without the need to break
the water piping. Bolted-on covers are arranged for con-
venient access. Victaulic nozzle connections are stan-
dard; flanges are optional. Marine water boxes are avail-
able for condenser and/or evaporator.
KNOCK-DOWN SHIPMENT
The chiller can be shipped knocked-down into major
assemblies (evaporator, condenser, driveline, etc.) as

SI Metric Conversion

The following factors can be used to convert from English to the most common Sl Metric values.
MEASUREMENT
CAPACITY TONS REFRIGERANT EFFECT (ton)
POWER
FLOW RATE
LENGTH
WEIGHT
VELOCITY
PRESSURE DROP
Integrated Part Load Value (IPLV)
In the English I-P system, IPLV is calculated by the fol-
lowing formula. A full explanation is shown on page 4:
IPLV* =
0.01 0.42
+
A
Where: A = kW / ton at 100% Load @ 85°F ECFT
B = kW / ton at
C = kW / ton at
D = kW / ton at
18
MULTIPLY THIS
ENGLISH VALUE
KILOWATTS (kW)
HORSEPOWER (hp)
GALLONS / MINUTE (gpm)
FEET (ft)
INCHES (in)
POUNDS (lb)
FEET / SECOND (fps)
FEET OF WATER (ft)
POUNDS / SQ. INCH (psi)
1
0.45
0.12
+ +
B C D
75% Load @ 75°F ECFT
50% Load @ 65°F ECFT
25% Load @ 65°F ECFT
required to rig into tight spaces. This is particularly con-
venient for existing buildings where equipment room
access does not allow rigging a factory packaged chiller.
REFRIGERANT STORAGE/RECYCLING SYSTEM
A refrigerant storage/recycling system is a self-contained
package consisting of a refrigerant compressor with oil
separator, storage receiver, water-cooled condenser, fil-
ter drier and necessary valves and hoses to remove,
replace and distill refrigerant. All necessary controls and
safety devices are a permanent part of the system. Typi-
cally not required if unit isolation valves are provided.
BY
3.516
NO CHANGE
0.7457
0.0631
304.8
25.4
0.4536
0.3048 METERS / SECOND (m/s)
2.989
6.895
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 fixed at 65°F (18.3°C) for 50% to 0% loads.
FORM 160.81-EG1
TO OBTAIN THIS
METRIC VALUE
KILOWATTS (kW)
KILOWATTS (kW)
KILOWATTS (kW)
LITERS / SECOND (L/s)
MILLIMETERS (mm)
MILLIMETERS (mm)
KILOGRAMS (kg)
KILOPASCALS (k Pa)
KILOPASCALS (k Pa)
YORK INTERNATIONAL