Johnson Controls York YKEP Series User Manual

FORM 160.77-O2
ISSUE DATE: 11/15/2011
SECTION 3 - YKEP CONTROL PANEL OPERATION
JOHNSON CONTROLS
37
3
Close
Access Level Required: OPERATOR
This key sends a close command to the Economizer
Valve. The Economizer Valve will decrease 1% for
each depress, hold for repeat.
Non Economized SP
Access Level Required: OPERATOR
This key allows the programing of the Economizer
Refrigerent Level target position for when the Econo-
mizer Compressor is OFF.
Economized SP
Access Level Required: OPERATOR
This key allows the programing of the Economizer
Refrigerent Level target position for when the Econo-
mizer Compressor is RUNNING.
P
Access Level Required: SERVICE
This key allows the progamming of the proportional
gain of the economizer level control independently for
zones 1 and 2.
I
Access Level Required: SERVICE
This key allows the programming of the integral gain
(minutes per repeat) of the economizer level control
independently for zones 1 and 2.
D
Access Level Required: SERVICE
This key allows the programming of the derivative
gain of the economizer level control for zones 1 and 2.
Zone
Access Level Required: SERVICE
Defines Zone 1 and Zone 2. The Zone value is the Per-
centage of the total range that Zone 1 tuning values
are used. For example, entering 10% will define a 10%
band around the setpoint where the steady state Zone 1
gains will be used.
Zone 1 is the steady state control loop gains, when the
process variable is near setpoint.
Zone 2 is the transient and more aggressive control
loop gains when the process variable is far away from
setpoint, and needs to be returned to setpoint more
quickly.
Ramp Rate
Access Level Required: SERVICE
This key allows the programming of the Economiz-
er setpoint change rate as a percentage per second
setpoint.
Min CV
Access Level Required: SERVICE
This key allows the programming of the Min Control
Value (CV) setpoint.
Start Delay
Access Level Required: SERVICE
This key allows the programming of the Level Control
Start Delay Setpoint. This defines the time delay from
when the chiller starts until when the level control be-
comes active and begins controlling level.
Standby
Access Level Required: SERVICE
This key allows the programming of the Economizer
Valve position at shutdown.
NAVIGATION
Previous
Returns the display to the previous screen.
Subcooler
Causes an instant navigation to view the Subcooler
Screen.
Alarm History
Causes an instant navigation to view the Alarm History
Screen.

Johnson Controls York YKEP Series Specifications

General

Brand	Johnson Controls
Model	York YKEP Series
Category	Chiller
Language	English