Specifications

31
FORM 160.80-NOM1
YORK INTERNATIONAL
Refrigerant Leak Check
% Thoroughly leak check the entire chiller for leaks
prior to starting. Make certain to include relief
valves. This may require removing field-installed
relief valve piping.
Compressor Oil
% Check the compressor oil level. Oil should be vis-
ible in the top sight glass on the side of the oil
separator.
% Make certain that the oil heater has been ener-
gized at least 24 hours prior to starting the chiller.
Oil temperature should be at least 15°F above satu-
rated refrigerant temperature.
OIL SEPARATOR SCREEN
Enter the following setpoints:
c Auto Zero ENABLE/DISABLE
c Seal Oil Pressure Transducer ENABLE/
DISABLE
Cooling Tower
% Verify that the cooling tower is operational and
the fans and controls are ready for the chiller to
be started.
Water Treatment
% Make certain the water treatment is in place and
operational.
Wiring
% Check and verify all interconnecting wiring with
the wiring diagram.
% Make certain all wire terminals are tight and plugs
are properly secured.
GRAPHIC CONTROL CENTER
PROGRAMMABLE FUNCTIONS
PROGRAM JUMPERS / SWITCHES
c Verify Micro Board Program Jumpers and Pro-
gram Switches are configured appropriately.
VARIABLE ORIFICE CONTROL SCREEN
c Enter the Delta P setpoint.
HOT GAS BYPASS SCREEN
If the chiller is equipped with optional Hot Gas Bypass
control, enable operation on the OPERATIONS screen
and enter the following setpoints:
c ON Setpoint
c OFF Setpoint
SETPOINTS SCREEN
The setpoints listed on the SETPOINTS screen have
already been programmed on previous screens. The
values shown reflect the previously programmed val-
ues. However, the setpoints listed here can be changed
on this screen if desired. This screen is used primarily
as a central location from which most setpoints can be
programmed. If it is not desired to change any of the
listed setpoints, proceed to the SETUP screen.
SETUP SCREEN
c Enable Clock
c Enter Clock Time and Date
c Select 12 or 24 hour display mode
c The states of Program Jumpers/Switches that
affect Chiller Operation are shown on the
SETUP screen. These were configured in set 1,
above. Refer to Tables 1 and 2 of Service Manual
160.80-M1 if it is desired to change them.
SCHEDULE SCREEN
c Enable or Disable Daily Start/Stop schedule as
required
c Enter chiller START/STOP schedule, if required.
USER SCREEN
c Select desired Display Language
c Select desired Display units; English or Metric
c If desired, establish custom User IDs and
Passwords.
COMMS SCREEN
If Modem or Printer is connected to the Micro Board
Serial Data Ports, enter the following parameters as
required for each device connected:
c Baud Rate
c Number of Data Bits
c Number of Stop Bits
c Parity
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