FORM 150.75-NM2
89
YORK INTERNATIONAL
and electronic components in the control panel. Addi-
tionally, actual discharge pressure read-outs can now
be obtained from the micro panel.
Discharge Pressure unloading allows the microproces-
sor to unload a compressor when the discharge pres-
sure approaches a point nearing the discharge pres-
sure cut-out. This assures that the system does not shut
down completely if the cut-out were to open. See page
49 for programming the unloading pressure.
Fan cycling by discharge pressure is also available when
this option is installed (See DISCHARGE PRESSURE
READ-OUT OPTION, page 88), however it is of little
use in areas where ambients are generally high and
standard temperature control of the fans provides good
control and maximum efficiency.
NOTE: The two Discharge Pressure Read-out Options
471-01232-131 and 471-01232-136 are not re-
quired if already installed.
LOCAL PRINTER OPTION
The Micro Panel is capable of supplying a print-out of chiller
conditions or fault shutdown information at any given time.
This allows operator and service personnel to obtain data
and system status with the touch of the keypad. In addi-
tion to manual print selection, the micro panel will provide
an automatic print out whenever a fault occurs. An expla-
nation of the keypad use to obtain a print out is discussed
in the PRINT KEY Section on page 61.
YORK recommends the field tested WEIGH-TRONIX
IMP-24, Model 2600 printer. This is a compact low cost
printer that is ideal for service work and data logging.
Paper is in the form of a compact roll and is easily
handled compared to other printers using wider busi-
ness form style paper. The paper is 2.25" wide desk-
top calculator paper that can be easily and inexpen-
sively purchased at most stationery stores. Shown in
Fig. 40 and 33 is the WEIGH-TRONIX printer and a
typical sample print out.
23889A
YORK INTERNATIONAL CORPORATION
RECIPROCATING WATER CHILLERS
SYSTEM STATUS
5:24AM 1/02/95
SYS 1
COMPRESSOR RUNNING
SYS 2
COMPRESSOR RUNNING
SYS 3
COMPRESSOR RUNNING
SYS4
ANTI-RECYCLE TIMER 119 SEC
RETURN WATER TEMP 1
82.8 DEGF
RETURN WATER TEMP 2
83.7 DEGF
LEAVING WATER TEMP 1
60.1 DEGF
LEAVING WATER TEMP 2
73.5 DEGF
MIXED WATER TEMP
49.3 DEGF
LOW WATER CUTOUT
36.0 DEGF
SETPOINT TEMP
44.0 DEGF
OUTSIDE AIR TEMP
66.6 DEGF
LOW AMBIENT CUTOUT
25.0 DEGF
LOW PRESSURE CUTOUT
44 PSIG
LEAD SYSTEM
SYS 1
CONTROL TYPE
LCHWT
COOLING RANGE
44.0 TO 46.0 DEGF
SYSTEM 1 DATA
COMPRESSOR STATUS
ON
MOTOR AMPS
30 %FLA
SUCTION PRESSURE
46 PSIG
DISCHARGE PRESSURE
312 PSIG
OIL PRESSURE
92
PSID
LIQUID LINE SOLENOID
ON
RUN PERMISSIVE
ON
STAGES OF LOADING
4
FORWARD FANS
2
REVERSE FANS
OFF
HOT GAS BYPASS VALVE
OFF
SYSTEM 2 DATA
COMPRESSOR STATUS
ON
MOTOR AMPS
65 %FLA
SUCTION PRESSURE
68 PSIG
DISCHARGE PRESSURE
334 PSIG
OIL PRESSURE
72
PSID
LIQUID LINE SOLENOID
ON
RUN PERMISSIVE
ON
STAGES OF LOADING
3
FORWARD FANS
2
REVERSE FANS
OFF
HOT GAS BYPASS VALVE
OFF
SYSTEM 3 DATA
COMPRESSOR STATUS
ON
MOTOR AMPS
22 %FLA
SUCTION PRESSURE
59 PSIG
DISCHARGE PRESSURE
291 PSIG
OIL PRESSURE
95
PSID
LIQUID LINE SOLENOID
ON
RUN PERMISSIVE
ON
STAGES OF LOADING
4
FORWARD FANS
2
REVERSE FANS
OFF
SYSTEM 4 DATA
COMPRESSOR STATUS
ON
MOTOR AMPS
30 %FLA
SUCTION PRESSURE
62 PSIG
DISCHARGE PRESSURE
327 PSIG
OIL PRESSURE
83
PSID
LIQUID LINE SOLENOID
OFF
RUN PERMISSIVE
ON
STAGES OF LOADING
1
FORWARD FANS
OFF
REVERSE FANS
OFF
S M T W T F S
* = HOLIDAY
SUN
START=00:00AM
STOP=00:00AM
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
FIG. 49
WEIGH-TRONIX IMP-24 MODEL 2600
PRINTER
FIG. 41
SAMPLE PRINT-OUT
