York YK Style H Operation Manual page 80

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
Oil Heater (LED – Variable Speed Oil Pump
Only)
Indicates whether the oil heater output is energized.
Oil Return Solenoid
Illuminates when the Oil Return Solenoid output is en-
ergized.
Oil Pump Run Output
Illuminates when the Oil Pump Run output is ener-
gized.
Oil Pump Drive Command Frequency (Vari-
able Speed Oil Pump Only)
Displays the actual speed command being sent to the
VSOP. This value could be the result of automatic con-
trol based on the Oil Pressure Setpoint, or the result of
a manual speed command.
Setpoint Oil Pressure (Variable Speed Oil
Pump Only)
The Variable Speed Oil Pump (VSOP), if installed, op-
erates to control to a defined Oil Pressure value. Dur-
ing prelube, and for the first 15 seconds after prelube,
this setpoint value is 45.0 PSID. During this time, this
field will display the target value. After 15 seconds,
this value will display the user-programmed setpoint
Oil Pressure.
Variable Speed Oil Pump Control Mode (Vari-
able Speed Oil Pump Only)
Indicates whether the Variable Speed Oil Pump speed
is under manual or automatic control.
For fields requiring access level of SER-
VICE. Service Technicians refer to the
OptiView Control Center - Service Instruc-
tions (Form 160.76-M1) for operation
instructions and explanation of all pro-
grammable setpoints and displayed values.
PROGRAMMABLE
Raise
Access Level Required: SERVICE
This key puts the VSOP control into manual mode and
increments the present speed command by 0.5Hz.
Lower
Access Level Required: SERVICE
This key puts the VSOP control into manual mode and
decrements the present speed command by 0.5Hz.
80
Set
Access Level Required: SERVICE
This key allows the user to specify a fixed manual
speed at which the VSOP will run.
Auto
Access Level Required: SERVICE
This key returns the VSOP to automatic mode where
control is based on the Oil Pressure Setpoint.
Manual Pump
Access Level Required: OPERATOR
This key puts the oil pump control in manual mode and
forces it to RUN. The oil pump is limited to running
for a maximum of ten (10) minutes. If a longer running
time is desired, this key must be pressed again. Manual
Oil Pump control is disabled (and the button hidden)
during System Prelube, System Run, Proximity Probe
Calibration, Seal Lubrication, and System Coastdown.
Standby Lube (Enabled / Disabled)
Access Level Required: SERVICE
Allows the user to enable or disable the standby lube
operation. When enabled, this function causes the oil
pump to operate for a period of two (2) minutes at 24-
hour intervals from when the oil pump was last run for
at least 2 minutes.
OIL RETURN MIN
Access Level Required: SERVICE
To avoid an OIL – LOW TEMPERATURE DIFFER-
ENTIAL cycling condition from preventing a chiller
start after running at low load conditions for extend-
ed periods, the Oil Return Solenoid (1SOL) is cycled
closed when the oil temperature gets too low on the P,
Q and H9 compressor chillers, while the chiller is run-
ning. The OIL RETURN MIN SETPOINT key appears
on the OIL SUMP Screen when the Chiller Style/Com-
pressor Type Setpoint (on the OPERATIONS Screen)
is set to P, Q or H9 compressor in SERVICE access
level. This setpoint is programmable over the range of
80.0°F to 110.0°F (default 95.0°F) and controls the oil
return Solenoid as follows:
• When the compressor is running and the Oil
Sump Temperature is less than the Oil Return Min
Setpoint, close (de-energize) the Oil Return Sole-
noid by de-energizing K12 relay.
FORM 160.76-O2
issue date: 6/15/2015
JOHNsON CONtROLs