York MILLENNIUM, Operating Instructions Manual

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8
YORK INTERNATIONAL
Condenser fan stage for the system.
Standard control:
Stage 1 = one fan forward
Stage 2 = two fans forward
Stage 3 = N/A
Low Ambient (optional)
Stage 1 = one fan reverse
stage 2 = one fan forward
stage 3 = two fans forward
See unit manual for details.
History Data
The HISTORY key gives the user access to many unit
and system operating parameters at the time of a unit
of system safety shutdown. When the HISTORY key
is pressed the following screen is displayed.
The user can use the arrow keys to choose a number
from 1 to 6 and ENTER to view any of the 6 history
buffers. Buffer number 1 is the most recent and buffer
number 6 is the oldest safety shutdown saved. The UP
and DOWN arrows can be used to scroll forwards and
backwards through the history buffers to view unit data,
unit status, and setpoints at the time of shutdown.
Data Printing
The PRINT key is used to initiate either an operating
data print or a history print if the optional printer
is attached to the RS-232 port in the RCC. When the
print key is pressed, the following message will
appear.
When the OPER DATA key is pressed after the PRINT
key, an operating data printout is initiated and the fol-
lowing message will be displayed for a few
seconds.
When the HISTORY key is pressed after the PRINT
key, a history printout is initiated and the following
message will be displayed for a few seconds.
If the PRINT key is pressed while a print is currently
being performed, the following message is displayed
for a few seconds and then unit status is displayed.
Sample Printout:
D I S P L A Y S A F E T Y S H U T -
D O W N N O . X ( 1 T O 6 )
P R E S S O P E R D A T A O R
H I S T O R Y K E Y T O P R I N T
P R I N T I N G
O P E R A T I N G D A T A
P R I N T E R
C U R R E N T L Y A C T I V E
YORK INTERNATIONAL CORPORATION
MILLENNIUM LIQUID CHILLER
UNIT STATUS
2:04PM 18 JUN 98
SYS 1 NO COOLING LOAD
SYS 2 COMPRESSORS RUNNING 2
OPTIONS
CHILLED LIQUID WATER
AMBIENT CONTROL STANDARD
LOCAL/REMOTE MODE REMOTE
CONTROL MODE LEAVING LIQUID
LEAD/LAG CONTROL AUTOMATIC
FAN CONTROL AMB & DSCH PRESS
UNIT DATA
RETURN LIQUID TEMP 58.2 DEGF
LEAVING LIQUID TEMP 53.0 DEGF
COOLING RANGE 42.0 +/- 2.0 DEGF
AMBIENT AIR TEMP 74.8 DEGF
LEAD SYSTEM SYS 2
EVAPORATOR PUMP ON
EVAPORATOR HEATER OFF
UNIT SOFTWARE VER C.MMC.01.00
RCC SOFTWARE VER C.MMC.02.00
SYSTEM 1 DATA
COMPRESSORS STATUS OFF
RUN TIME 0- 0- 0- 0 D-H-M-S
SUCTION PRESSURE 66 PSIG
DISCHARGE PRESSURE 219 PSIG
LIQUID LINE SOLENOID OFF
HOT GAS BYPASS VALVE OFF
CONDENSER FAN STAGES OFF
SYSTEM 2 DATA
COMPRESSORS STATUS 2
RUN TIME 0- 0- 1-46 D-H-M-S
SUCTION PRESSURE 51 PSIG
DISCHARGE PRESSURE 157 PSIG
LIQUID LINE SOLENOID ON
CONDENSER FAN STAGES 3
DAILY SCHEDULE
S M T W T F S *=HOLIDAY
MON START=00:00AM STOP=00:00AM
TUE START=00:00AM STOP=00:00AM
WED START=00:00AM STOP=00:00AM
THU START=00:00AM STOP=00:00AM
FRI START=00:00AM STOP=00:00AM
SAT START=00:00AM STOP=00:00AM
HOL START=00:00AM STOP=00:00AM
S Y S X F A N S T A G E X X X
P R I N T I N G
H I S T O R Y D A T A
Unit Data