York YK-EP, Operation And Maintenance Manual

Page: 146 / 268

Table 141: Programmable
Button Access level Description
PRV Position Service
This setpoint allows the software to be used in all YK-EP chillers,
whether equipped with the potentiometer or not. The PRV position
will be shown on respective screens when Enabled.
• Enabled – Automatically set to this setting if Hot Gas Bypass
or Variable Geometry Diffuser (VGD) is enabled on the
OPERATIONS Screen or Motor Drive Type Setpoint is set to
VSD or MVVSD. It is connected to the Microboard J7.
• Disabled – Set to this position when not equipped with a PRV
potentiometer. If equipped with a VSD, MVVSD or the Hot Gas
Bypass, or Variable Geometry Diffuser is enabled; this setpoint
is automatically enabled and cannot be set to disabled.
Motor Drive
Type
Service
Allows a Service Technician to enter the applied compressor motor
type as either Electro-Mechanical (EM), Solid State Starter (SSS-Mod
A), Solid State starter (SSS – Mod B), Variable Speed Drive-60 Hz
Variable Speed Drive-50 Hz, MVVSD or MVSSS.
Anti-Recycle Service
Allows a Service Technician to enable or disable the anti-recycle
timer for test purposes only.
Head
Pressure
Control
Service
Allows the Service Technician to enable or disable the Head Pressure
Control feature.
Heat
Recovery
Service
Allows the Service Technician to enable or disable the Heat Recovery
feature.
Power Failure
Restart
Operator
Allows the user to select Manual or Automatic restart after power
failure.
Coastdown Service
Allows a Service Technician to select either Standard (electric
motor) or Enhanced (15 minutes–Steam Turbine applications).
When Standard is selected, the duration is programmable using the
Coastdown Time Setpoint between 240 and 900 seconds.
Motor
Monitoring
Service
Allows the Service Technician to enable or disable the Motor
Monitoring feature.
Pre-Run Service
Allows Service Technician to select either Standard (30 seconds) or
Extended (180 seconds).
Oil Pump
Package
Service
Allows Service Technician to enter the applied oil pump drive type as
either Variable Speed or Fixed Speed.
YK-EP
Control
Service Allows selection of YK-EP program functions.
Line
Frequency
Service Sets the Line Frequency to either 60 Hz or 50 Hz as appropriate.
Motor Heater Service Set to Enabled if motor heaters installed else, set to Disabled.
YK-EP Style B Centrifugal Chiller 146