York YK-EP, Operation And Maintenance Manual

Page: 88 / 268

Economizer capacity control setpoints screen
Figure 30: Economizer capacity control setpoints screen
This screen displays a view of the economizer capacity control setpoints and buttons. Service Level
Access is required to navigate to this screen.
Table 77: Adjustable
Field/LED
name
Access level Description
High
Head for
Refrigerant
Flow
Service
Range 5 to 150 PSID, Default 64 PSID
This displays the high head setpoints at which the economizer
will activate. These points can be changed according to when the
operator wishes the economizer to start operating.
Refrigerant
Flow Criteria
at High Head
Service
Range 100 to 50000 CFM, Default 6000 CFM
Displays the refrigerant flow in CFM that is where the economizer
will activate in the high head condition.
Low Head for
Refrigerant
Flow
Service
Range 5 to 150 PSID, Default 30 PSID
This displays the low head setpoints at which the economizer
will activate. These points can be changed according to when the
operator wishes the economizer to stop operating.
Refrigerant
Flow Criteria
at Low Head
Service
Range 100 to 50000 CFM, Default 8200 CFM
Displays the refrigerant flow in CFM that is where the economizer
will activate in the low head condition.
YK-EP Style B Centrifugal Chiller 88