YORK INTERNATIONAL
8
MANUAL SPEED CONTROL
The oil pump speed can be manually controlled using
the Pre-Rotation Vanes OPEN, CLOSE, HOLD or
AUTO keys in SERVICE mode. Manual pump speed
control must be selected using the procedure below.
After the pump has been turned on with the “MANUAL
OIL PUMP” key, the “OPEN” and “CLOSE” keys
can be used to increase or decrease the VSOP drive’s
output frequency over the range of 25Hz to 60Hz. Each
time the “OPEN” key is pressed, the frequency is in-
creased 0.5Hz. Each time the “CLOSE” key is pressed,
the frequency is decreased 0.5Hz. If the AUTO key is
pressed, automatic operation as described previously is
resumed.
A special feature allows the VSOP drive to output a
specific pre-determined frequency. This permits service
analysis of oil pressure at various oil pump speeds. This
frequency is programmed as the “OIL PUMP VSD
FREOUENCY=XX HZ” setpoint in the “Program-
ming” procedure below. If the “HOLD” key is pressed,
the VSD output goes to the OIL PUMP VSD FRE-
QUENCY.
During manual operation, the DISPLAY DATA key can
be used to monitor the VSOP drive’s commanded out-
put frequency and system oil pressure. One of the
scrolled messages is
OIL PUMP VSD FREQ=XX.XHZ;PRS=XX.XPSID
As on fixed speed oil pump applications, after the pump
is manually turned on, it is automatically turned off
after 10 minutes of operation, if not manually termi-
nated earlier.
To enable the keypad PRV Service keys for manual oil
pump speed control, perform the following:
1. This procedure assumes VSOP drive operation has
been selected using the procedure below under
“Programming”
2. Using Access Code 1 3 8 0, enter Program
Mode.
PROGRAM MODE SELECT SETPOINT
is displayed.
3. Press OPTIONS key.
4. Use the ADVANCE DAY/SCROLL key to scroll
to the message
MANUAL CONTROL = X (0=VANES, 2=OP)
If the Liquid Level option is not installed
MANUAL CONTROL = X (0=VANES, 1=LVL, 2=OP)
If the Liquid Level option is installed
5. Press the “2” key.
6. Press ENTER key.
7. Press PROGRAM key to exit.
Manual oil pump speed control can be confirmed by
pressing the “DISPLAY DATA” key. The first scrolled
message will be
MANUAL OIL PUMP SPEED CONTROL ALLOWED
PROGRAMMING
This EPROM version can be used in chillers that are
equipped with the VSOP Drive and those that are
equipped with the fixed speed oil pump. If the chiller is
equipped with the VSOP Drive, VSOP Drive applica-
tion must be selected below. If the chiller is not equipped
with the VSOP drive, fixed speed oil pump application
must be selected. If VSOP Drive application is selected,
additional VSD setpoints, as described below, must be
entered. Also, the “Standby Lubrication” feature, as
described below, can be enabled or disabled in this pro-
cedure.
1. Using Access Code 1 3 8 0, enter Program
Mode.
PROGRAM MODE, SELECT SETPOINT
is displayed.
2. Press OIL PRESSURE key.
VSD OIL PUMP INSTALLED = 0 (0=NO;1=YES)
is displayed.
3. Using ENTRY keys, press “1” if chiller is equipped
with the VSOP Drive. Press “0” if this is a fixed
speed oil pump application.
4. Press ENTER key.
5. Press ADVANCE DAY/SCROLL key.
ENABLE STANDBY LUBE = 0 (0=NO;1=YES)
is displayed.
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