York Millennium YCAS 316 Installation Operation & Maintenance page 94

To program the SYSTEM 1 MOTOR CURR, access the
password protected values as described previously. Key
in the current value that equals 100% FLA and press the
ENTER key. The new value will be entered into memory
and the display will advance to the next user
programmable value.
SYSTEM 2 MOTOR CURR
S Y S T E M 2
1 8 3 A M P S
SYSTEM 2 MOTOR CURR allows the operator to display
the approximate current that the motor is drawing by
pressing the Display key labeled % MOTOR CURRENT.
SYSTEM 2 MOTOR CURR also allows the motor current
to be programmed at 100% full load to permit the micro to
determine the approximate slide valve position when
controlling loading/unloading. This is important to allow
load sharing.
Select the actual current at 100% load by selecting the
chiller model and voltage from Table 2 and its
corresponding AMPS at 100% RLA. Approximate FLA
can be determined by formula: RLA x 1.2 = 100% FLA.
To program the SYSTEM 2 MOTOR CURR, access the
password protected values as described previously. Key
in the current value that equals 100% FLA and press the
ENTER key. The new value will be entered into memory
and the display will advance to the next user
programmable value.
LIQUID INJECTION TEMP LIMIT
L I Q U I D I N J E C T I O N
T E M P L I M I T
LIQUID INJECTION TEMP LIMIT programs the
discharge temperature at which the liquid injection
solenoid is energized to allow liquid to be injected into the
TABLE 2 – CHILLER SYS 1 AND SYS 2 MOTOR CURRENT = 100% FLA
MODEL
YCAS ENGR. DATA SYS 1 FLA
140 6A2A2KN6A
160 6M4M4KN6A
170 6F5M5NN6A
180 6F5F5NN6A
190 6H6F5NN6A
216 6P7H6NN6A
236 6P7P7NN6A
246 6S7S7NN6A
216x 10H5H5NN6A
236x 10P6H6NN6A
266x 10S7S7NN6A
94
M O T O R C U R R
= 1 0 0 % F L A
= 1 8 0 . 0 ° F
200 VOLTS (-17) 230 VOLTS (-28)
SYS 2 FLA SYS 1 FLA SYS 2 FLA
338 338 294
406 406 354
484 484 421
484 484 421
598 484 522
— —
— —
— —
— —
— —
— —
compressor for oil cooling. This assures that temper-
atures of the oil are maintained low enough to assure
proper lubrication and compressor cooling.
The recommended program point is 180°F (82.1°C).
To program the LIQUID INJECTION TEMP LIMIT,
access the password protected values described
previously. Key in the value and press the ENTER key.
The new value will be entered into memory and the display
will advance to the next programmable value.
Once on, the liquid injection will turn off 20°F below the
"ON" temperature.
SYSTEM 1 COND TEMP
If loading/unloading is selected utilizing slide valve %, the
design condensing temperature (discharge pressure
converted to temperature or CTP) at 100% load must be
programmed for each system for the specific model of
chiller that is utilized.
To program SYSTEM 1 COND TEMP, access the
password protected values as previously described. Key
in the value for the specific model number from Table 3
and press the ENTER key. The new value will be entered
into memory and the display will advance to the next
programmable option.
NOTE: Proper operation is dependent on proper
programming of this value.
Shown below is an example of this display:
S Y S T E M
1 1 9 . 0
SYSTEM 2 COND TEMP
If loading/unloading is selected utilizing slide valve %, the
design condensing temperature (discharge pressure
converted to temperature or CTP) at 100% load must be
programmed for each system for the specific model of
chiller that is utilized.
460 VOLTS (-46)
SYS 1 FLA SYS 2 FLA
294 147
354 176
421 210
421 210
421 259
— — 320
— — 320
— — 320
— — 210
— — 259
— — 320
1 C O N D T E M P
° F = 1 0 0 % L O A D
575 VOLTS (-58)
SYS 1 FLA
147 118
176 141
210 169
210 169
210 207
259 254
320 254
320 254
210 169
259 207
320 254
YORK INTERNATIONAL
SYS 2 FLA
118
141
169
169
169
207
254
254
169
207
254