York YK Style H Operation Manual page 62

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 45: Programmable
V09 software
Button
and earlier
Close
Service
Percentage
Hold Period Service
Minimum Load Service
Process Hot
Service
Gas
Hot Gas Liquid
Injection Service
(Optional)
Table 46: Navigation
V09 software
Button
and earlier
Home View
Capacity View
62
V10 and later
with YORK
Description
Chiller Access
Manager
Adjustable 1% to 15%; Default 5%
JCI Service
This is the incremental amount that the Hot Gas Valve will be closed at 10
minute intervals after the HOLD period has elapsed.
Adjustable 30 Min to 120 Min; Default 30 Min
JCI Service
This is the period of time after no more surges are detected that the Hot
Gas Valve will begin to close.
Enabled or Disabled; Default Enabled
This sets the offset below the Leaving Chilled Liquid Temperature Setpoint
JCI Service
at which the Hot Gas Valve will be opened to the position allowed by the
Maximum Open Setpoint.
Enabled or Disabled; Default Disabled
The Process Hot Gas setting allows the control to respond quicker to
fast load changes. When Process Hot Gas is enable and the chiller is in
Prelube, Running or Soft Shutdown the HGBP command is based on the
Entering Chilled Liquid Temperature.
ECHLT value
ECHLT < Selected Cooling Setpoint
JCI Service
ECHLT > Selected Cooling Setpoint +
Process Offset
(adjustable at service level from 0.5°F to
40.0°F, with 10°F default)
ECHLT is between the Selected Cooling
Setpoint and Selected Cooling Setpoint +
Process Offset
Enabled or Disabled; Default Disabled
The hot gas liquid injection is turned on, if all of the following are true:
• HGBP Command > Hot Gas Liquid Injection Threshold (Adjustable
5% to 100%, with a 100%default)
JCI Service
• Chiller state is running or soft shutdown
The hot gas liquid injection is turned off, if all of the following are true:
• HGBP Command < Hot Gas Liquid Injection Threshold (4.9%)
• Chiller state is not running or not soft shutdown
V10 and later
with YORK
Description
Chiller Access
Manager
View Returns the user to Home screen.
View Returns the user to Capacity Control screen.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
HGBP command
Maximum Open.
0.0%
Linear value between
Maximum Open and 0.0%