Specifications

32 YORK INTERNATIONAL
An optional status printer is available for this purpose
or Fig. 20 shows a log sheet used by YORK personnel
for recording test data on chillers. It is available from
the factory in pads of 50 sheets each under Form No.
160.44-F6 and may be obtained through the nearest
YORK office. Automatic data logging is possible by con-
necting the optional printer and programming the DATA
LOGGER function; Ref. Form 146.48-NO1.2.
An accurate record of readings serves as a valuable
reference for operating the system. Readings taken when
a system is newly installed will establish normal condi-
tions with which to compare later readings.
For example, dirty condenser tubes may be indicated
by higher than normal temperature differences between
leaving condenser water and refrigerant leaving the
condenser.
OPERATING INSPECTIONS (See Section 2)
By following a regular inspection using the display
readings of the MicroComputer Control Center, and
maintenance procedure, the operator will avoid se-
rious operating difficulty. The following list of inspec-
tions and procedures should be used as a guide.
Daily
1. Check MicroComputer Control Center displays.
2. If the compressor is in operation, check the bear-
ing oil pressure by pressing “OIL PRESSURE” key
to read the display on the Control Center. Also check
the oil level in the oil reservoir. Drain or add oil if
necessary.
3. Check entering and leaving condenser water pres-
sure and temperatures for comparison with job de-
sign conditions. Condenser water temperatures can
be checked by pressing “CONDENSER LIQUID TEM-
PERATURES” display key.
4. Check the entering and leaving chilled liquid tem-
peratures and evaporator pressure for comparison
with job design conditions. This can be accomplished
by pressing the “CHILLED LIQUID TEMPS” key and
the “Refrigerant Pressures” key.
5. Check the condenser saturation temperature (based
upon condenser pressure sensed by the condenser
transducer). Press the “DISPLAY DATA” key. This key
may be depressed repeatedly after depressing the
“Display Hold” key to display three different param-
eters.
6. Check the compressor discharge temperature.
Press “Display Data” key. During normal operation
discharge temperature should not exceed 220°F.
7. Check the compressor motor voltage and current
*NOTE: These items can be printed by an electronic printer connected to J-11 of the Micro Board and pressing the
PRINT key on the Micro Board or automatically using the Data Logger feature.
FIG. 20 - LIQUID CHILLER LOG SHEETS - FORM 160.44-F6
23889A
LD00467