117
YORK INTERNATIONAL
FORM 201.18-NM2
The Cooler Inlet Temp. display will
only appear if the chiller is selected
for R-407C.
Temperatures and pressures are either measured di-
rectly by transducers and temperature sensors, or com-
puted from these measurements as follows :
Differential oil pressure is the pressure difference be-
tween oil leaving the discharge oil separator and oil pres-
sure reaching the compressor. It is computed by sub-
tracting oil pressure measured after the oil line filter
from discharge pressure (oil in the oil separator is at
discharge pressure.). Typically for a clean oil filter the
drop will be 0.1 - 0.7 bar (2 - 10 PSID) but may reach
up to 3 bar (40 PSID).
Saturated discharge and suction temperatures are com-
puted by converting measured pressure to temperature.
Slide Valve Position is computed based on the number
of loading steps that the micro has sent to the slide valve
solenoid in the form of a current signal. To the Micro-
processor, Step 0 equals fully unloaded and step 75 equals
fully loaded.
Slide valve position is approximate
and should be used for reference only.
Under actual conditions, the compres-
sor may be fully loaded between step
60 -75 and fully unloaded between step
0 -40.
Superheats are the difference between the respective
saturated temperature (converted from pressure) and
the actual. Display Limits for the System Pressures and
Temperatures displays are as follows:
Minimum and maximum values may
change as software (EPROM) revi-
sions are made.
* Below 13ºC (9.0ºF), the Suction
Temp. display will disappear. This will
in turn cause the Superheat display to
disappear.
3.4 AMBIENT TEMP KEY
When the Ambient Temperature key is pressed, ambi-
ent air temperature, as measured surrounding the chiller,
is displayed.
Display Limits: Minimum =
-20.3ºC
(-4.6ºF)
Maximum =
58.8ºC
(137.9ºF)
3.5 MOTOR CURRENT KEY
Pressing the Motor Current key displays compressor
current for each system:
This display shows the average motor current in amps
and average compressor motor current as a percentage
of FLA. All values are approximate. Keep in mind that
current in “amps” is an “approximate” value.
A M B I E N T
A I R
T E M P
=
2 2 . 2
° C
S #
S A T
D S C H =
5 4 . 4 ° C
D S C H
S H E A T
=
3 0 . 2 ° C
S Y S
#
S
V
S T E P
=
3
S Y S
#
C O O L E R
I N L E T
R E F R I G
T E M P =
– 2 . 1 ° C
S Y S
#
O I L =
0 . 3
B A R
S P =
6 4
D P =
1 3 . 4
B A R
S Y S
#
O I L
=
6 9 . 7 ° C
S T =
3 1 . 0
D T =
5 0 . 7 ° C
S #
S A T
S U C T
=
0 . 5 ° C
S U C T
S H E A T
=
8 . 3 ° C
C O M P
1 = 6 3
A M P
8 5 % F L A
C O M P
2 = 3 0
A M P
4 1 % F L A
9
MIN. LIMIT
MAX. LIMIT
Oil Pressure
14 bar (208 psid)
0 bar
(0 psid)
Suction Pressure
0 bar
(0 psig)
14 bar (199 psig)
Discharge Pressure
0 bar
(0 psig)
28 bar (399 psig)
Suction Temp.
*13.0 °C
(9.0°F)
29°C
(84.2°F)
Discharge Temp.
5 °C
(40.3°F)
150°C (302.6 °F)
Oil Temp.
5 °C
(40.3°F)
116°C (240.0 °F)
Sat. Discharge Temp.
-41.0 °C
(-41°F)
60°C (140.5 °F)
Sat. Suction Temp.
-41.0 °C
(-41°F)
39°C (101.3 °F)
Slide Valve Position
0
75
Suction Superheat
-35.3 °C
(37.4°F)
16°C
(60.9 °F)
Discharge Superheat
5.3°C
(22.5ºF)
102°C
(216ºF)
Summary of Contents for MILLENNIUM YCAS
Page 53: ...53 YORK INTERNATIONAL FORM 201 18 NM2 WIRING DIAGRAM ACROSS THE LINE START 7...
Page 54: ...54 YORK INTERNATIONAL FIG 12 CONTINUED ELEMENTARY DIAGRAM Technical Data...
Page 59: ...59 YORK INTERNATIONAL FORM 201 18 NM2 WIRING DIAGRAM WYE DELTA START LD03229 FIG 15 CONT D 7...
Page 60: ...60 YORK INTERNATIONAL FIG 15 CONTINUED ELEMENTARY DIAGRAM Technical Data...
Page 62: ...62 YORK INTERNATIONAL FIG 16 POWER PANEL FRONT INSIDE VIEW WYE DELTA START Technical Data...
Page 68: ...68 YORK INTERNATIONAL FIG 24 DETAIL B Technical Data...
