126
YORK INTERNATIONAL
the associated evaporator. Both sections have their own
control panel, but only the Section 1 and 2 panel is fitted
with a keypad and display.
When the History key is pressed, the following mes-
sage will appear:
To select a Safety Shutdown, press the appropriate key
on the numeric key pad then press Enter. Remember
that the most recent fault information is stored as shut-
down No. 1. Repetitively pressing the Enter key now
scrolls through the information available in the Safety
Shutdown buffer.
The Safety Shutdown displays for the YCAS 4-System
Models have the same structure and sequence as the
YCAS System 2 Model messages as given in the pre-
ceding paragraphs. The only difference is that after the
System 2 data is completed, pressing the
áá
áá
á key dis-
plays System 3 and System 4 data before looping back
to the start of the Safety Shutdown display.
4.7 FAULT HISTORY DATA -
REMOTE PRINTOUT
A printout history of unit and system operating condi-
tions, at the time of the fault, can be obtained by press-
ing the HISTORY Key with an optional printer installed.
2-compressor chillers will provide a history printout on
the last 6 faults and 3 & 4-compressor chillers will pro-
vide printouts on the last 4 faults. Printouts for 2, 3 and
4-compressor models will be similar.
An example of the HISTORY Printout is shown.
DI SPLAY SAFETY SHUT -
DOWN NO . 1 ( 1 TO 4 )
YORK INTERNATIONAL CORPORATION
MILLENNIUM SCREW CHILLER
SAFETY SHUTDOWN NUMBER 1
SHUTDOWN @ 3:56 PM 23 SEPT 99
SYS 1 HIGH DSCH PRESS SHUTDOWN
SYS 2 NO FAULTS
OPTIONS
CHILLED LIQUID WATER
AMBIENT CONTROL STANDARD
REFRIGERANT TYPE R-22
PROGRAM VALUES
DSCH PRESS CUTOUT 399 PSIG
DSCH PRESS UNLOAD 375 PSIG
SUCT PRESS CUTOUT 44 PSIG
HIGH AMBIENT CUTOUT 130.0 ºF
LOW AMBIENT CUTOUT 25.0 ºF
LEAVING LIQUID CUTOUT 36.0 ºF
MOTOR CURRENT UNLOAD 100 %FLA
ANTI RECYCLE TIME 600 SECS
LOCAL/REMOTE LEAD DATA REMOTE
LEAD /LAG CONTROL AUTOMATIC
UNIT DATA
LEAVING LIQUID TEMP 49.0 ºF
RETURN LIQUID TEMP 58.2 ºF
MIXED LIQUID TEMP 51.3 ºF
COOLING RANGE 42.0 +/-2.0 ºF
AMBIENT AIR TEMP 74.8 ºF
LEAD SYSTEM SYS 2
EVAPORATOR PUMP ON
EVAPORATOR HEATER OFF
ACTIVE REMOTE CONTROL NONE
SOFTWARE VERSION C.ACS.09.00
SYSTEM 1 DATA
COMPRESSORS STATUS OFF
RUN TIME 0- 0- 0- 0 D-H-M-S
MOTOR CURRENT 0 AMPS 0 %FLA
SUCTION PRESSURE 125 PSIG
DISCHARGE PRESSURE 131 PSIG
OIL PRESSURE 130 PSIG
SUCTION TEMPERATURE 68.4 ºF
DISCHARGE TEMPERATURE 68.8 ºF
OIL TEMPERATURE 68.8 ºF
SAT SUCTION TEMP 71.8 ºF
SUCTION SUPERHEAT 3.4 ºF
SAT DISCHARGE TEMP 74.5 ºF
DISCHARGE SUPERHEAT 6.3 ºF
SLIDE VALVE STEP 0
COOLER INLET REFRIG 44.6 ºF
LIQUID LINE SOLENOID OFF
ECONOMIZER TXV SOLENOID OFF
CONDENSER FAN STAGE OFF
COMPRESSOR HEATER ON
WYE-DELTA RELAY OFF
SYSTEM 2 DATA
COMPRESSORS STATUS ON
RUN TIME 0- 0-15-26 D-H-M-S
MOTOR CURRENT104 AMPS 87 %FLA
SUCTION PRESSURE 57 PSIG
DISCHARGE PRESSURE 233 PSIG
OIL PRESSURE 218 PSIG
SUCTION TEMPERATURE 42.9 ºF
DISCHARGE TEMPERATURE145.5 ºF
OIL TEMPERATURE 102.8 ºF
SAT SUCTION TEMP 31.7 ºF
SUCTION SUPERHEAT 11.2 ºF
SAT DISCHARGE TEMP 112.1 ºF
DISCHARGE SUPERHEAT 33.4 ºF
SLIDE VALVE STEP 70
COOLER INLET REFRIG 23.6 ºF
LIQUID LINE SOLENOID ON
ECONOMIZER TXV SOLENOID ON
CONDENSER FAN STAGE 3
COMPRESSOR HEATER OFF
WYE-DELTA RELAY ON
DAILY SCHEDULE
S M T W T F S *=HOLIDAY
Micropanel
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