York YK-EP Operation And Maintenance Manual page 146

Table 141: Programmable
Button Access level
PRV Position Service
Motor Drive
Service
Type
Anti-Recycle Service
Head
Pressure Service
Control
Heat
Service
Recovery
Power Failure
Operator
Restart
Coastdown Service
Motor
Service
Monitoring
Pre-Run Service
Oil Pump
Service
Package
YK-EP
Service
Control
Line
Service
Frequency
Motor Heater Service
146
Description
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.
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.
Allows a Service Technician to enable or disable the anti-recycle
timer for test purposes only.
Allows the Service Technician to enable or disable the Head Pressure
Control feature.
Allows the Service Technician to enable or disable the Heat Recovery
feature.
Allows the user to select Manual or Automatic restart after power
failure.
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.
Allows the Service Technician to enable or disable the Motor
Monitoring feature.
Allows Service Technician to select either Standard (30 seconds) or
Extended (180 seconds).
Allows Service Technician to enter the applied oil pump drive type as
either Variable Speed or Fixed Speed.
Allows selection of YK-EP program functions.
Sets the Line Frequency to either 60 Hz or 50 Hz as appropriate.
Set to Enabled if motor heaters installed else, set to Disabled.
YK-EP Style B Centrifugal Chiller