York YDAJ87HU7, Руководство пользователя, Страница: 89 / 100

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