York YK Style H, Руководство по эксплуатации

Страница: 78 / 212

Table 65: Display only fields
Field/LED name Description
Active Oil Pressure Setpoint
(Variable Speed Oil Pump Only)
The Variable Speed Oil Pump (VSOP), if installed, operates to control to a defined Oil
Pressure value. During 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.
Oil Pump Control State Indicates the current Control State of the Variable Speed Oil Pump.
Oil Pressure Control State Indicates the Oil Pressure Control State of the Variable Speed Oil Pump.
Note: For fields requiring access level of Service. Service Technicians must refer to the OptiView
Control Center - Service Instructions (Form 160.76-M1) for operation instructions and explanation
of all programmable setpoints and displayed values.
Table 66: Programmable
Button
V09 software
and earlier
V10 and later
with YORK
Chiller Access
Manager
Description
Raise Service JCI Service
This key puts the VSOP control into manual mode and increments the
present speed command by 0.5 Hz.
Lower Service JCI Service
This key puts the VSOP control into manual mode and decrements the
present speed command by 0.5 Hz.
Set Service JCI Service
This key allows the user to specify a fixed manual speed at which the
VSOP will run.
Auto Service JCI Service
This key returns the VSOP to automatic mode where control is based on
the Oil Pressure Setpoint.
Oil Return Min Service JCI Service
To avoid an
OIL – LOW TEMPERATURE DIFFERENTIAL
cycling condition
from preventing a chiller start after running at low load conditions for
extended 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 running. The Oil Return Min setpoint key appears on
the Oil Sump screen when the Chiller Style/Compressor 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 Solenoid by de-energizing K12 relay.
• When the compressor is running and Oil Sump Temperature is
more than Oil Return Min plus 7°F, open (energize) the Oil Return
Solenoid by energizing K12 relay.
• During coastdown, the solenoid operation is not changed from
standard logic, it remains closed. During startup the operation is
not changed from standard logic, it remains closed for 1 minute
after System Run.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center 78